CA2048390C - Extraction of underground pipe - Google Patents
Extraction of underground pipeInfo
- Publication number
- CA2048390C CA2048390C CA002048390A CA2048390A CA2048390C CA 2048390 C CA2048390 C CA 2048390C CA 002048390 A CA002048390 A CA 002048390A CA 2048390 A CA2048390 A CA 2048390A CA 2048390 C CA2048390 C CA 2048390C
- Authority
- CA
- Canada
- Prior art keywords
- pipe
- cable
- vehicle
- winch
- abutment
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L1/00—Laying or reclaiming pipes; Repairing or joining pipes on or under water
- F16L1/024—Laying or reclaiming pipes on land, e.g. above the ground
- F16L1/06—Accessories therefor, e.g. anchors
- F16L1/065—Accessories therefor, e.g. anchors fixed on or to vehicles
Abstract
"EXTRACTION OF UNDERGROUND PIPE"
ABSTRACT OF THE DISCLOSURE
Underground pipe is withdrawn in a continuous pipe portion without excavating the full length of the pipe by positioning in an opening at one end of the pipe portion a boom mounted on a vehicle. The boom carries a lower reaction member which projects forwardly from a rear end of the opening into contact with a brace at the front face of the opening. A winch mounted on the vehicle operates on a cable passing over pulleys carried on the boom including a pulley at the lowermost end of the boom at the rear end of the reaction member. The cable is passed through the pipe portion to an abutment member on the far end so the whole of the pipe portion can be pulled in one action. The abutment member can carry a plug or guide for a replacement pipe portion.
ABSTRACT OF THE DISCLOSURE
Underground pipe is withdrawn in a continuous pipe portion without excavating the full length of the pipe by positioning in an opening at one end of the pipe portion a boom mounted on a vehicle. The boom carries a lower reaction member which projects forwardly from a rear end of the opening into contact with a brace at the front face of the opening. A winch mounted on the vehicle operates on a cable passing over pulleys carried on the boom including a pulley at the lowermost end of the boom at the rear end of the reaction member. The cable is passed through the pipe portion to an abutment member on the far end so the whole of the pipe portion can be pulled in one action. The abutment member can carry a plug or guide for a replacement pipe portion.
Description
"EXTRACTION OF UNDF~RGROUND PIPE"
BACKGROUND OF THE INVENTION
This invention relates to a method and apparatu~
for extraction of underground pipe by a technique which involves pulling a portion of the pipe into an opening formed in the ground at one end of the portion without the necessity for excavating along the full length of the pipe portion.
The replacement of existing underground pipe is becoming more important now that the pipes are becoming old with the danger o~ breakage and leaking. It i9 well known that in many situation~ it is highly desirable to be able to remove the pipe without the necessity for excavating along the full length of the pipe pa~ticularly where the pipe cro~ses busy highways, rail lines or other obstacles.
However the desicability of carryiny out this step is known, up till now no suitable apparatus or me~hod has been available to enable this to be carried out. This is particularly because the amount of force involved in pulling a signi~icant length of the pipe from the ground is extremely high and no pcactical technique for generating this significant level of force has up till now been available.
Less satisfactory techniques have therefore involved pulling ~ wedge along the pipe which forces the pipe outwardly breaking it into pieces which is then forced radially o~twardly into the ground surrounding the position of the original pipe. A replacemen~ pipe can then be pulled ~: :
BACKGROUND OF THE INVENTION
This invention relates to a method and apparatu~
for extraction of underground pipe by a technique which involves pulling a portion of the pipe into an opening formed in the ground at one end of the portion without the necessity for excavating along the full length of the pipe portion.
The replacement of existing underground pipe is becoming more important now that the pipes are becoming old with the danger o~ breakage and leaking. It i9 well known that in many situation~ it is highly desirable to be able to remove the pipe without the necessity for excavating along the full length of the pipe pa~ticularly where the pipe cro~ses busy highways, rail lines or other obstacles.
However the desicability of carryiny out this step is known, up till now no suitable apparatus or me~hod has been available to enable this to be carried out. This is particularly because the amount of force involved in pulling a signi~icant length of the pipe from the ground is extremely high and no pcactical technique for generating this significant level of force has up till now been available.
Less satisfactory techniques have therefore involved pulling ~ wedge along the pipe which forces the pipe outwardly breaking it into pieces which is then forced radially o~twardly into the ground surrounding the position of the original pipe. A replacemen~ pipe can then be pulled ~: :
- 2 - 2~
longitudinally through the opening thus formed. This technique involves significantly less force and is thus readily available but i5 in many cases impractical since the broken pieces of the pipe generally of cast iron or steel are very sharp and can then penetrate the replacement pipe as the ground resettles.
Another technique shown in United States patent no:
4,626,134 (Coumont) attempts to pull the pipe by a hydraulic ram arrangement which is inserted into the pipe from one end and then acts to grasp an end of a pipe section and pull it into the opening where the ram is located~ Thi~ device has achieved little succe~s in view of the fact that l~ ~3 highly inefficient to pull the pipe one section at a time and in view o the fact that the hydraulic ram in many cases cannot generate enough force to provide the pulling action. The technique is also limited to relatively small pipes.
SUMMARY OF THE INVENTION
It is one object of the present invention, therefore, to provide an irnproved method and apparatus for removing underground pipe.
According to a first aspect of the invention, therefore, there is provided a method for extracting underground pipe compriqing excavating a first and a second opening in the ground to expose a first and a second end of a portion of the pipe, passing a cable through the pipe from the first end to the second end, attaching an abutment member : , :
~: :
longitudinally through the opening thus formed. This technique involves significantly less force and is thus readily available but i5 in many cases impractical since the broken pieces of the pipe generally of cast iron or steel are very sharp and can then penetrate the replacement pipe as the ground resettles.
Another technique shown in United States patent no:
4,626,134 (Coumont) attempts to pull the pipe by a hydraulic ram arrangement which is inserted into the pipe from one end and then acts to grasp an end of a pipe section and pull it into the opening where the ram is located~ Thi~ device has achieved little succe~s in view of the fact that l~ ~3 highly inefficient to pull the pipe one section at a time and in view o the fact that the hydraulic ram in many cases cannot generate enough force to provide the pulling action. The technique is also limited to relatively small pipes.
SUMMARY OF THE INVENTION
It is one object of the present invention, therefore, to provide an irnproved method and apparatus for removing underground pipe.
According to a first aspect of the invention, therefore, there is provided a method for extracting underground pipe compriqing excavating a first and a second opening in the ground to expose a first and a second end of a portion of the pipe, passing a cable through the pipe from the first end to the second end, attaching an abutment member : , :
~: :
3 ~ ~
to the cable at the second end so as to engage the second end of the pipe portion, winding the cable onto a winch mounted at the first opening, guiding the cable at the first opening so as to apply a longitudinal pulling force on the pipe portion to pull the pipe portion into the first opening and engaging a side of the opening adjacent the first end to apply a reaction forces from the pulling force to the ground surrounding the pipe wherein the winch is mounted on a vehicle at a position outside the opening and the cable is guided by pulleys from the vehicle into the opening, wherein the pipe is pulled through an lnitial movemen~ by winding said cable onto the winch while sAid ~eaction force~ are applied to the ground ~urrounding the pipe, and wherein the pipe is pulled through a subse~uent movement by halting the winding of the cable onto the winch and moving the vehicle away from the opening.
According to a second aspect of the invention, there i~ provided an apparatu~ for extracting underground pipe at an excavated hole in the ground at an end of the pipe, the excavated hole having a vertical planar end face through which the pipe projects, the apparatu~ comprising a vehicle having ground engaging means for movement of the vehicle across the ground, a winch mounted on the vehicle for winding and releasing a cable having a free end remote from the winch, abutment means on the remote end of the cable for engaging a remote end of the pipe to apply a pulling force : :
- 3 - 2~
thereto, an abutment frame structure for mounting in the excavated hole and defining a front substantially planar surface for engaging the end face of the hole, first pulley means arranged to direct the cable from the winch to turn downwardly into the hole, second pulley means, fra~e means mounting the second pulley means arranged at a position spaced from the abutment frame structure so as to direct the cable from the first pulley mean~ in a direction substantially at right angles to the front surface of the abutment frame ~tructure, mean~ in~erconnec~ing the :Erame means and the abutment frame structure to transm~.t reac~orl forces therebetween in response to the pulling Eorce on the cable and means for interconnecting the frame means and the vehicle to communicate said reaction forces therebetween, wherein said means interconnecting the frame means and the vehicle comprises a boom connected to the vehicle and pivotal relative thereto and wherein the winch is mounted upon a longitudinal frame o~ the vehicle at a po~ition underneath the boom.
According to a third aspect of the invention, there i~ provided an apparatus ~or extracting underground pipe at an excavated hole in the ground at an end of the pipe, the excavated hole having a vertical planar end face through which the pipe projects, the apparatus comprising a vehicle having ground engaglng means for movement of the vehicle across the ground, a winch mounted on the vehicle for winding . .
, , -- 3A -- 2 ~ ~ S~
and releasing a cable having a free end remote from the winch, abutment means on the remote end of the cable for engaging a remote end of the pipe to apply a pulling force thereto, an abutment frame structure for mounting in the excavated hole and defining a front substantially planar surface for engaging the end face of the hole, first pulley means arranged to direct the cable from the winch to turn down~ardly into the hole, second pulley means, frame means mounting the second pulley means arranged at a position ~paced from the abutment frame structure so as to direct the cable from the first pulley means in a direction substantially at right anyles to the front surface of the abutment frame structure, means interconnecting the frame ............................................................................. ... . . .
means and the abutment frame structure to transmit reaction .~
forces therebetween in response to the pulling force on the :;-:;
cable and means for interconnecting the frame means and the i vehicle to communicate said reaction forces therebetween, .~ .: : .: ;
wherein the winch is mounted on the vehicle separate from the frame means and the abutment frame structure, wherein the frame means comprises a substantially vertical beam, wherein the abutment frame structure comprises a pair of vertical members each for positioning on a re~pective side of the pipe and at least one transverse member connecting the vertical members, the vertical members and at least one transverse member lying in said substantially planar suface and a plurality of separate connecting members extending from said - 3B - ~
2~83~
abutment frame structure to said vertical beam at vertically spaced positions thereon, the first pulley being mounted at a top of the substantially vertical beam and the second pulley means being arranged at a bottom of the substantially vertical beam.
With the foregoing in view, and other advantages as .
to the cable at the second end so as to engage the second end of the pipe portion, winding the cable onto a winch mounted at the first opening, guiding the cable at the first opening so as to apply a longitudinal pulling force on the pipe portion to pull the pipe portion into the first opening and engaging a side of the opening adjacent the first end to apply a reaction forces from the pulling force to the ground surrounding the pipe wherein the winch is mounted on a vehicle at a position outside the opening and the cable is guided by pulleys from the vehicle into the opening, wherein the pipe is pulled through an lnitial movemen~ by winding said cable onto the winch while sAid ~eaction force~ are applied to the ground ~urrounding the pipe, and wherein the pipe is pulled through a subse~uent movement by halting the winding of the cable onto the winch and moving the vehicle away from the opening.
According to a second aspect of the invention, there i~ provided an apparatu~ for extracting underground pipe at an excavated hole in the ground at an end of the pipe, the excavated hole having a vertical planar end face through which the pipe projects, the apparatu~ comprising a vehicle having ground engaging means for movement of the vehicle across the ground, a winch mounted on the vehicle for winding and releasing a cable having a free end remote from the winch, abutment means on the remote end of the cable for engaging a remote end of the pipe to apply a pulling force : :
- 3 - 2~
thereto, an abutment frame structure for mounting in the excavated hole and defining a front substantially planar surface for engaging the end face of the hole, first pulley means arranged to direct the cable from the winch to turn downwardly into the hole, second pulley means, fra~e means mounting the second pulley means arranged at a position spaced from the abutment frame structure so as to direct the cable from the first pulley mean~ in a direction substantially at right angles to the front surface of the abutment frame ~tructure, mean~ in~erconnec~ing the :Erame means and the abutment frame structure to transm~.t reac~orl forces therebetween in response to the pulling Eorce on the cable and means for interconnecting the frame means and the vehicle to communicate said reaction forces therebetween, wherein said means interconnecting the frame means and the vehicle comprises a boom connected to the vehicle and pivotal relative thereto and wherein the winch is mounted upon a longitudinal frame o~ the vehicle at a po~ition underneath the boom.
According to a third aspect of the invention, there i~ provided an apparatus ~or extracting underground pipe at an excavated hole in the ground at an end of the pipe, the excavated hole having a vertical planar end face through which the pipe projects, the apparatus comprising a vehicle having ground engaglng means for movement of the vehicle across the ground, a winch mounted on the vehicle for winding . .
, , -- 3A -- 2 ~ ~ S~
and releasing a cable having a free end remote from the winch, abutment means on the remote end of the cable for engaging a remote end of the pipe to apply a pulling force thereto, an abutment frame structure for mounting in the excavated hole and defining a front substantially planar surface for engaging the end face of the hole, first pulley means arranged to direct the cable from the winch to turn down~ardly into the hole, second pulley means, frame means mounting the second pulley means arranged at a position ~paced from the abutment frame structure so as to direct the cable from the first pulley means in a direction substantially at right anyles to the front surface of the abutment frame structure, means interconnecting the frame ............................................................................. ... . . .
means and the abutment frame structure to transmit reaction .~
forces therebetween in response to the pulling force on the :;-:;
cable and means for interconnecting the frame means and the i vehicle to communicate said reaction forces therebetween, .~ .: : .: ;
wherein the winch is mounted on the vehicle separate from the frame means and the abutment frame structure, wherein the frame means comprises a substantially vertical beam, wherein the abutment frame structure comprises a pair of vertical members each for positioning on a re~pective side of the pipe and at least one transverse member connecting the vertical members, the vertical members and at least one transverse member lying in said substantially planar suface and a plurality of separate connecting members extending from said - 3B - ~
2~83~
abutment frame structure to said vertical beam at vertically spaced positions thereon, the first pulley being mounted at a top of the substantially vertical beam and the second pulley means being arranged at a bottom of the substantially vertical beam.
With the foregoing in view, and other advantages as .
- 4 ~
'' ' ' will become appar~nt to those skilled in the art to which ~ :
thi~ invention relates as this specification proceeds, the invention is herein described by reference to the accompanying drawings forming a part hereof, which include3 a description of the best mode known to the applicant and of the preferred typical embodiment of the principles of the present invention, in which: .
DESCRIPTION OF THE DRAWINGS: :
. ...
Figure 1 i~ a schmatic ~ide elevat.ional view of an . .
apparatu~ and ~y9tem ~or extracting underground pipe.
Figure 2 i9 a part cross sectional vlew along the lines 2~2 of Figure 1.
Figure 3 is a cross sectional view through a rear . .
end of the pipe portion together with a front section of a replacement pipe portion for insertion into the underground location.
Figure 4 is a schematic view along the lines 4-4 of Figure 1.
Figure 5 is a view similar to that of Figure 1 ~howing a further ~tep in the process. :
.... . . . .
:~ In the drawing~ like characters of reference : indicate corresponding parts in the different figures.
DETAILED DESCRIPTION : .
A portion o~ underground pipe in indicated at 10 buried within an overburden 11 and located between a first :
. ..-~ opening 12 in the ground and a second opening 13. The : .
:. . .
'' ' ' will become appar~nt to those skilled in the art to which ~ :
thi~ invention relates as this specification proceeds, the invention is herein described by reference to the accompanying drawings forming a part hereof, which include3 a description of the best mode known to the applicant and of the preferred typical embodiment of the principles of the present invention, in which: .
DESCRIPTION OF THE DRAWINGS: :
. ...
Figure 1 i~ a schmatic ~ide elevat.ional view of an . .
apparatu~ and ~y9tem ~or extracting underground pipe.
Figure 2 i9 a part cross sectional vlew along the lines 2~2 of Figure 1.
Figure 3 is a cross sectional view through a rear . .
end of the pipe portion together with a front section of a replacement pipe portion for insertion into the underground location.
Figure 4 is a schematic view along the lines 4-4 of Figure 1.
Figure 5 is a view similar to that of Figure 1 ~howing a further ~tep in the process. :
.... . . . .
:~ In the drawing~ like characters of reference : indicate corresponding parts in the different figures.
DETAILED DESCRIPTION : .
A portion o~ underground pipe in indicated at 10 buried within an overburden 11 and located between a first :
. ..-~ opening 12 in the ground and a second opening 13. The : .
:. . .
- 5 ~ 3~ ~
overburden in the ~rea between the openings 12 and 13 can be at an obstruction for example a busy road inter~ection where it is highly undesirable to excavate the whole of the length of the pipe between the openings 90 that it is necessary for the pipe to be extracted by pulling the pipe directly from the underground location in an axial direction to remove the pipe for replacement. The distance between the opening 12 and 13 is not shown to scale but in practice can be as much as 100 to 150 feet which i~ certianly ~ufficierlt to accommodate the ave~age ob~acle ~uch a~ roadway~, ~ail lines, landscaping, etc.
The 3ystem for removing the pipe includes a vehicle generally indicated at 14 shown schematically in Figures 1 and 4. The vehicle includes a main longitudinal frame 15, a cab and drive section 16 and driven tracks 17 on which ~he vehicle can move relative to the ground. Vehicles of this type are of course well known and are often u~ed for heavy excavation work. Such a vehicle generally include~ a lift arm 18 pivotally rnounted on the top of the vehicl~ for movement about a horizontal axis under control of a hydraulic lit system schematically indicated at 19.
At the outer end of the lift arm 18 is mounted a vertical arm ~ection 20 which is pivotal about a horizontal pivot pin 21 under control of a hydraulic actuating cylinder 22. Mounted on the lower end of the vertical portion 20 is a horizontal lower portion gener~lly indicated at 23 formed of - 6 - 2~
a lower beam 24 an~d an upper beam 25. The lower beam 24 i~
connected to the portion 20 just above the lowermost end thereof and the beam 25 i9 mounted thereon the position above the beam 24. The beams are connected by a vertical strut 26.
One or both of the beams i9 connected to the portion 20 by a pair of coupling pins 26 so as to prevent pivotal movement of the beams relative to the portion 20 and to hold the beams in a position generally at right angles to the portion 20.
A~ 3hown in Figure 2 each o the beam~ 24 and 25 is tubular 90 a~ to provide very high re~istance to compre~ion in the longitudinal direction oP the beam.
The main longitudinal frame element 15 of the vehicle projects ~orwardly to a front end 15A beyond the front edge of the cab 16. On the front end is welded a transverse vertical flange 28 which provides a support ~or a winch assembly 29 of very large force capacity. The winch 29 i3 driven by a hydraulic motor 30 receiving power from a pump schematically indicated at 31 driven by the engine of the vehicle. The motor 30 drives a step down box 32 which in turn drives a sprocket and chain drive system 33 providing input drive to a main shat 34 of the winch. A clutch 35 is operated hydraulically by control lines from the vehicle control sy~tem tnot shown). The winch carries the cable 36 which can thus be reeled in oc released by operation of the winch in a direction controlled by the hydraulic motor 30.
The cable 36 passes over a first pulley 37 and a second :
overburden in the ~rea between the openings 12 and 13 can be at an obstruction for example a busy road inter~ection where it is highly undesirable to excavate the whole of the length of the pipe between the openings 90 that it is necessary for the pipe to be extracted by pulling the pipe directly from the underground location in an axial direction to remove the pipe for replacement. The distance between the opening 12 and 13 is not shown to scale but in practice can be as much as 100 to 150 feet which i~ certianly ~ufficierlt to accommodate the ave~age ob~acle ~uch a~ roadway~, ~ail lines, landscaping, etc.
The 3ystem for removing the pipe includes a vehicle generally indicated at 14 shown schematically in Figures 1 and 4. The vehicle includes a main longitudinal frame 15, a cab and drive section 16 and driven tracks 17 on which ~he vehicle can move relative to the ground. Vehicles of this type are of course well known and are often u~ed for heavy excavation work. Such a vehicle generally include~ a lift arm 18 pivotally rnounted on the top of the vehicl~ for movement about a horizontal axis under control of a hydraulic lit system schematically indicated at 19.
At the outer end of the lift arm 18 is mounted a vertical arm ~ection 20 which is pivotal about a horizontal pivot pin 21 under control of a hydraulic actuating cylinder 22. Mounted on the lower end of the vertical portion 20 is a horizontal lower portion gener~lly indicated at 23 formed of - 6 - 2~
a lower beam 24 an~d an upper beam 25. The lower beam 24 i~
connected to the portion 20 just above the lowermost end thereof and the beam 25 i9 mounted thereon the position above the beam 24. The beams are connected by a vertical strut 26.
One or both of the beams i9 connected to the portion 20 by a pair of coupling pins 26 so as to prevent pivotal movement of the beams relative to the portion 20 and to hold the beams in a position generally at right angles to the portion 20.
A~ 3hown in Figure 2 each o the beam~ 24 and 25 is tubular 90 a~ to provide very high re~istance to compre~ion in the longitudinal direction oP the beam.
The main longitudinal frame element 15 of the vehicle projects ~orwardly to a front end 15A beyond the front edge of the cab 16. On the front end is welded a transverse vertical flange 28 which provides a support ~or a winch assembly 29 of very large force capacity. The winch 29 i3 driven by a hydraulic motor 30 receiving power from a pump schematically indicated at 31 driven by the engine of the vehicle. The motor 30 drives a step down box 32 which in turn drives a sprocket and chain drive system 33 providing input drive to a main shat 34 of the winch. A clutch 35 is operated hydraulically by control lines from the vehicle control sy~tem tnot shown). The winch carries the cable 36 which can thus be reeled in oc released by operation of the winch in a direction controlled by the hydraulic motor 30.
The cable 36 passes over a first pulley 37 and a second :
- 7 ~ 9~
pulley 38. The first pulley is mounted on the lift arm 18 at the end thereof adjacent the pivot couplng 21 by a support clevi~ 39. The clevis 39 i3 again formed of very qtrong construction so that vertical force on the clevia provided by the vertical portion of the cable can be communicated from the pulley 37 into the arm 18 to accommodate the full force capacity of the winch 29. The pulley 38 i9 similarly mounted upon a clevis 40 mounted on a rear face of the vertical portion 20 of the boom. The lower portion of the periphery of the pulley 38 is thus positioned ju~t below the lowe~most end o~ the vertiaal portion Z0 90 that the cable 36 can extend forwardly from the lower periphery of the pulley 38 in the horizontal direction shown for entering the pipe 10.
A separate H-beam section 42 comprises a pair of vertical angle irons 43 and 44 aq best ihown in Figure 2 :::
connected by horizontal struts 45. The spacing of the angle : . -irons 43 and 44 i~ arranged such that the beams 24 and 25 just enter into the interior and rest against the webs of the angIe irons ~orming the vertical front surface of the H-beam .:
42. The H-beam can thus be pressed against the front side of :. ~ .
the opening 12 to provide a reaction against the soil for ~:
forces genera~ed by ~he horizontal pulling action on the : -~
-.
:: cable 36. The position of the lower horizontal strut 45 i~
arranged 90 that the pipe 10 can be accommodated underneath :
the horizontal strut. Different diameters of pipe can thus be accommodated from small pipe of the order of four or five - 8 - 2~11339~
. .
inches up to large pipes of the o.-der of twenty-four inche~ ~ -diameter.
A~ particularly shown in Figur.e 3, the far end of the cable 36 include~ an end block 44 which i9 integrally :-~connected to the end o~ the cable ~o as to enable the communication of force on the cable ~o various coupling ..
element3. As shown in Figure 3 the end block i connected to .
an abutment member 45 including a disc-shaped end plate 46 ~ ;
and a cylindrical insert 47 which project~ into the interior ";
o~ the pipe 10. The disc-shapQd end plate 46 inCludes a ~lot 48 whichls keyhole-shaped so the block 44 can be pa3~0d through the wider portion and then moved downwardly into tho . .: .
narrower portion of the slot so that the block is held on the rear ~ace of the end di~c 46 to enable force to be ~
communicated to the abutment member 4$ and thu3 to the end of ~ ;
the pipe 10. Various shape3 and de3ign~ of abutment member 45 can be provided to accommodate different design3 and 3izes ~, . . .
o~ pipe 10.
The abutment member ~urther includes a ~ing 49 on the rear face ~or connection to a chain 50 by which the abutment member can be used to trail further equipment a~
explained hereinafter.
In Figure 1, the abutment 45 i~ trailed by a plug 51 including a ~front coupling ring 52 followed by a conical : surface S3 and a cylindrical surface 54. Th~ cylindrical 3ur~ace 54 haa a diametec~slight1y greater than that of the 9 2~ 39~
pipe 10 ~o that when pulled through the opening behind the pipe a~ it i9 removed, the plug member acts to clean the opening by compressing the ~oil around the area of the removed pipe so that further pipe section can be simply inserted into the bore thus formed.
In Figure 3, the chain 50 is connected to a front guide element 55 which forms a sleeve for receiving the front end of a new pipe section indicated at 56. Again the element include~ a conical front ~urface 57 and a cylLndrical 3urface 58 which act ag cleaning element3 ~or ~he bo~e and at the same time pcotect the front end of ~he pipe 56 ~o that they can be easily drawn into place. The chain 50 can be connected to the front end of the element 55 in any suitable manner and in one example, the front end can include a 310t for receiving one link of the chain 50. The chain 50 can then be threaded through the pipe section 56 to a further abutment member 59 at the rear end of the pipe section 56 to which the chain 50 i9 relea~ably attached again for example u~ing the 310t coupling which enagage3 one link of the chain 50. In thi9 way the abutment member 59 can be relea3ed from the chain and attached to the rear end of a further ~ection ..
after the further section i~ threaded onto the chain 50. In ~-this way a plurality o~ ~ections can be pulled into the bore formed by the removal of the existing pipe with each section ;
in turn being threaded onto the chain a3 the previou~ 3ection pulled into the bore hole.
Z~4~90 : -~
In Figur~e 1 i~ shown in addition to the pulling action of the cable 36 on the abutment member 45 an additional force geneeated by a cylinder 60 mounted in the opening 13. It has been determined that ths force to initially move the existing underground pipe from it- rest position through the first few inche~ or few ~eet of movement is significantly greater than the remaining force once the initial movement has taken place. It will be appreciated that the bonding which occur~ between the ~oil and the out~ide of the pipe o~ an~ opening~ or inderl~atlon~ on khe out~ide of the pipe i~ significantly greater than tha friction between the soil and the pipe once the bondiny has been broken. For thi~ purpose therefore the ram i~ also included to provide an additional force during the fir~ few inche~ or feet of movement that is the first movement of the pipe from the slightly exposed position at the front of the opening 12 to a position where the pipe reaches the rear end of the lower portion 23 of the boom. Once the initial movement is complete, the ram 60 can be removed.
As shown in Figure S, once the initial movement of the pipe i5 complete 90 that it is moved a ew feet from the initial re~t position to a posi~ion adjacent ~he pulley 38, the boom can be lifted from the opening 12 by raising the lift arm 18 90 the end of the pipe is pulled upwardly to just ; clear the upper cear edge indicated at 12A of the opening 12.
From this position the pipe and the cable 36 can be pulled 39~
from the opening simply by moving the cable and the pipe in a direction away from the opening by attachment to a suitable vehicle. In cases where it i3 unsuitable for the heavy track vehicle 14 to move away from ~he opening, the cable can be attached to a ~eparate vehicle on tires which pulls the pipe and the cable longitudinally away from the opening to pull the pipe out of the ground. In other caqes the vehicle 14 may simply move rearwardly away from the opening to pull the pipe ~ully from the ground.
The initial connection of the cable to the abutment member can be carrled out by th~eading th~ough t.he pipe portion in the underground location a stiff feeder wire which i9 then attached to a thin feeder cable which pulls the heavy cable 36 through the pipe from the winch to the second opening. The heavy cable 36 may have a diameter of the order of 1.5 inche~ to accommodate the very larges forces involved~
The winch can have a horsepower capacity of the orde~ of 900 hp. generated by the step-down gear system from the hydraulic motor 30.
A~ shown in Figure 5, the pipe portion is formed ln 3hort pipe section3 of the order of ten feet in length coupled by v~rious techniqueq depending on the pipe concerned. The whole of the pipe portion in its complete :: . .
sections can therefore be pulled out of the underground location in one action. ~ -Where the size or location of the pipe prevents it : . . :
1339~
' ' ' ' .
from being drawn out of the opening in the manner shown in Figure 5, the separate pipe sections can be broken within the ~:
opening 12 and removed manually. For this puepose a blade 61 .:-is mounted on the front edge of the vertical portion 20 of the boom so as to project forwardly just above the cable 36.
The end face of the pipe section drawn by the cable thus . .:,. .
comes into contact with the blade 61 so the pipe section is then fractured in longitudinal direction breaking it in~o pieces which can be i~imply manually removed ~rom the opening.
10Since variou9 modi~ica~ions can be made in my invention a~ herelnabove de~cribed, and many apparently widely di~erent embodiments o~ i~ame made within the spirit and scope of the claim~ without departing ~rom i3uch ~pirit and scope, it iis intended that all matter contained in the accompanying specification shall be interpreted as illustrative only and not in a limiting isense.
.:
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pulley 38. The first pulley is mounted on the lift arm 18 at the end thereof adjacent the pivot couplng 21 by a support clevi~ 39. The clevis 39 i3 again formed of very qtrong construction so that vertical force on the clevia provided by the vertical portion of the cable can be communicated from the pulley 37 into the arm 18 to accommodate the full force capacity of the winch 29. The pulley 38 i9 similarly mounted upon a clevis 40 mounted on a rear face of the vertical portion 20 of the boom. The lower portion of the periphery of the pulley 38 is thus positioned ju~t below the lowe~most end o~ the vertiaal portion Z0 90 that the cable 36 can extend forwardly from the lower periphery of the pulley 38 in the horizontal direction shown for entering the pipe 10.
A separate H-beam section 42 comprises a pair of vertical angle irons 43 and 44 aq best ihown in Figure 2 :::
connected by horizontal struts 45. The spacing of the angle : . -irons 43 and 44 i~ arranged such that the beams 24 and 25 just enter into the interior and rest against the webs of the angIe irons ~orming the vertical front surface of the H-beam .:
42. The H-beam can thus be pressed against the front side of :. ~ .
the opening 12 to provide a reaction against the soil for ~:
forces genera~ed by ~he horizontal pulling action on the : -~
-.
:: cable 36. The position of the lower horizontal strut 45 i~
arranged 90 that the pipe 10 can be accommodated underneath :
the horizontal strut. Different diameters of pipe can thus be accommodated from small pipe of the order of four or five - 8 - 2~11339~
. .
inches up to large pipes of the o.-der of twenty-four inche~ ~ -diameter.
A~ particularly shown in Figur.e 3, the far end of the cable 36 include~ an end block 44 which i9 integrally :-~connected to the end o~ the cable ~o as to enable the communication of force on the cable ~o various coupling ..
element3. As shown in Figure 3 the end block i connected to .
an abutment member 45 including a disc-shaped end plate 46 ~ ;
and a cylindrical insert 47 which project~ into the interior ";
o~ the pipe 10. The disc-shapQd end plate 46 inCludes a ~lot 48 whichls keyhole-shaped so the block 44 can be pa3~0d through the wider portion and then moved downwardly into tho . .: .
narrower portion of the slot so that the block is held on the rear ~ace of the end di~c 46 to enable force to be ~
communicated to the abutment member 4$ and thu3 to the end of ~ ;
the pipe 10. Various shape3 and de3ign~ of abutment member 45 can be provided to accommodate different design3 and 3izes ~, . . .
o~ pipe 10.
The abutment member ~urther includes a ~ing 49 on the rear face ~or connection to a chain 50 by which the abutment member can be used to trail further equipment a~
explained hereinafter.
In Figure 1, the abutment 45 i~ trailed by a plug 51 including a ~front coupling ring 52 followed by a conical : surface S3 and a cylindrical surface 54. Th~ cylindrical 3ur~ace 54 haa a diametec~slight1y greater than that of the 9 2~ 39~
pipe 10 ~o that when pulled through the opening behind the pipe a~ it i9 removed, the plug member acts to clean the opening by compressing the ~oil around the area of the removed pipe so that further pipe section can be simply inserted into the bore thus formed.
In Figure 3, the chain 50 is connected to a front guide element 55 which forms a sleeve for receiving the front end of a new pipe section indicated at 56. Again the element include~ a conical front ~urface 57 and a cylLndrical 3urface 58 which act ag cleaning element3 ~or ~he bo~e and at the same time pcotect the front end of ~he pipe 56 ~o that they can be easily drawn into place. The chain 50 can be connected to the front end of the element 55 in any suitable manner and in one example, the front end can include a 310t for receiving one link of the chain 50. The chain 50 can then be threaded through the pipe section 56 to a further abutment member 59 at the rear end of the pipe section 56 to which the chain 50 i9 relea~ably attached again for example u~ing the 310t coupling which enagage3 one link of the chain 50. In thi9 way the abutment member 59 can be relea3ed from the chain and attached to the rear end of a further ~ection ..
after the further section i~ threaded onto the chain 50. In ~-this way a plurality o~ ~ections can be pulled into the bore formed by the removal of the existing pipe with each section ;
in turn being threaded onto the chain a3 the previou~ 3ection pulled into the bore hole.
Z~4~90 : -~
In Figur~e 1 i~ shown in addition to the pulling action of the cable 36 on the abutment member 45 an additional force geneeated by a cylinder 60 mounted in the opening 13. It has been determined that ths force to initially move the existing underground pipe from it- rest position through the first few inche~ or few ~eet of movement is significantly greater than the remaining force once the initial movement has taken place. It will be appreciated that the bonding which occur~ between the ~oil and the out~ide of the pipe o~ an~ opening~ or inderl~atlon~ on khe out~ide of the pipe i~ significantly greater than tha friction between the soil and the pipe once the bondiny has been broken. For thi~ purpose therefore the ram i~ also included to provide an additional force during the fir~ few inche~ or feet of movement that is the first movement of the pipe from the slightly exposed position at the front of the opening 12 to a position where the pipe reaches the rear end of the lower portion 23 of the boom. Once the initial movement is complete, the ram 60 can be removed.
As shown in Figure S, once the initial movement of the pipe i5 complete 90 that it is moved a ew feet from the initial re~t position to a posi~ion adjacent ~he pulley 38, the boom can be lifted from the opening 12 by raising the lift arm 18 90 the end of the pipe is pulled upwardly to just ; clear the upper cear edge indicated at 12A of the opening 12.
From this position the pipe and the cable 36 can be pulled 39~
from the opening simply by moving the cable and the pipe in a direction away from the opening by attachment to a suitable vehicle. In cases where it i3 unsuitable for the heavy track vehicle 14 to move away from ~he opening, the cable can be attached to a ~eparate vehicle on tires which pulls the pipe and the cable longitudinally away from the opening to pull the pipe out of the ground. In other caqes the vehicle 14 may simply move rearwardly away from the opening to pull the pipe ~ully from the ground.
The initial connection of the cable to the abutment member can be carrled out by th~eading th~ough t.he pipe portion in the underground location a stiff feeder wire which i9 then attached to a thin feeder cable which pulls the heavy cable 36 through the pipe from the winch to the second opening. The heavy cable 36 may have a diameter of the order of 1.5 inche~ to accommodate the very larges forces involved~
The winch can have a horsepower capacity of the orde~ of 900 hp. generated by the step-down gear system from the hydraulic motor 30.
A~ shown in Figure 5, the pipe portion is formed ln 3hort pipe section3 of the order of ten feet in length coupled by v~rious techniqueq depending on the pipe concerned. The whole of the pipe portion in its complete :: . .
sections can therefore be pulled out of the underground location in one action. ~ -Where the size or location of the pipe prevents it : . . :
1339~
' ' ' ' .
from being drawn out of the opening in the manner shown in Figure 5, the separate pipe sections can be broken within the ~:
opening 12 and removed manually. For this puepose a blade 61 .:-is mounted on the front edge of the vertical portion 20 of the boom so as to project forwardly just above the cable 36.
The end face of the pipe section drawn by the cable thus . .:,. .
comes into contact with the blade 61 so the pipe section is then fractured in longitudinal direction breaking it in~o pieces which can be i~imply manually removed ~rom the opening.
10Since variou9 modi~ica~ions can be made in my invention a~ herelnabove de~cribed, and many apparently widely di~erent embodiments o~ i~ame made within the spirit and scope of the claim~ without departing ~rom i3uch ~pirit and scope, it iis intended that all matter contained in the accompanying specification shall be interpreted as illustrative only and not in a limiting isense.
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Claims
CLAIMS:
(1) A method for extracting underground pipe comprising excavating a first and a second opening in the ground to expose a first and a second end of a portion of the pipe, passing a cable through the pipe from the first end to the second end, attaching an abutment member to the cable at the second end so as to engage the second end of the pipe portion, winding the cable onto a winch mounted at the first opening, guiding the cable at the first opening so as to apply a longitudinal pulling force on the pipe portion to pull the pipe portion into the first opening and engaging a side of the opening adjacent the first end to apply a reaction forces from the pulling force to the ground surrounding the pipe wherein the winch is mounted on a vehicle at a position outside the opening and the cable is guided by pulleys from the vehicle into the opening, wherein the pipe is pulled through an initial movement by winding said cable onto the winch while said reaction forces are applied to the ground surrounding the pipe, and wherein the pipe is pulled through a subsequent movement by halting the winding of the cable onto the winch and moving the vehicle away from the opening.
(2) The invention according to Claim 1 wherein the pipe is formed in a plurality of separate sections and wherein the portion includes more than one section.
(3) The invention according to Claim 1 including attaching a plug member behind the abutment member, the plug member having a diameter greater than that of the pipe so as to clean the hole as the pipe is removed.
(4) The invention according to Claim 3 including attaching a new pipe behind the plug member such that the new pipe is pulled into the hole as the old pipe is withdrawn.
(5) The invention according to Claim 4 wherein the new pipe is formed in sections and wherein an abutment member is placed behind each new section in turn as the new pipe section is drawn into place.
(6) The invention according to Claim 1 including providing a hydraulic ram at the second end of the pipe portion and actuatng the ram to provide an additional pushing force against the second end of the pipe portion during at least a first portion of the movement of the pipe portion.
(7) The invention according to Claim 1 including breaking the pipe by pulling an end face of the pipe against a fixed blade.
(8) Apparatus for extracting underground pipe at an excavated hole in the ground at an end of the pipe, the excavated hole having a vertical planar end face through which the pipe projects, the apparatus comprising a vehicle having ground engaging means for movement of the vehicle across the ground, a winch mounted on the vehicle for winding and releasing a cable having a free end remote from the winch, abutment means on the remote end of the cable for engaging a remote end of the pipe to apply a pulling force thereto, an abutment frame structure for mounting in the excavated hole and defining a front substantially planar surface for engaging the end face of the hole, first pulley means arranged to direct the cable from the winch to turn downwardly into the hole, second pulley means, frame means mounting the second pulley means arranged at a position spaced from the abutment frame structure so as to direct the cable from the first pulley means in a direction substantially at right angles to the front surface of the abutment frame structure, means interconnecting the frame means and the abutment frame structure to transmit reaction forces therebetween in response to the pulling force on the cable and means for interconnecting the frame means and the vehicle to communicate said reaction forces therebetween, wherein said means interconnecting the frame means and the vehicle comprises a boom connected to the vehicle and pivotal relative thereto and wherein the winch is mounted upon a longitudinal frame of the vehicle at a position underneath the boom.
(9) The apparatus according to Claim 8 wherein the frame means comprises a substantially vertical beam, wherein the abutment frame structure comprises a pair of vertical members each for positioning on a respective side of the pipe and at least one transverse member connecting the vertical members, the vertical members and at least one transverse member lying in said substantially planar surface and a plurality of separate connecting members extending from said abutment frame structue to said vertical beam at vertically spaced positions thereon, the first pulley being mounted at a top of the substantially vertical beam and the second pulley means being arranged at a bottom of the substantially vertical beam.
(10) Apparatus for extracting underground pipe at an excavated hole in the ground at an end of the pipe, the excavated hole having a vertical planar end face through which the pipe projects, the apparatus comprising a vehicle having ground engaging means for movement of the vehicle across the ground, a winch mounted on the vehicle for winding and releasing a cable having a free end remote from the winch, abutment means on the remote end of the cable for engaging a remote end of the pipe to apply a pulling force thereto, an abutment frame structure for mounting in the excavated hole and defining a front substantially planar surface for engaging the end face of the hole, first pulley means arranged to direct the cable from the winch to turn downwardly into the hole, second pulley means, frame means mounting the second pulley means arranged at a position spaced from the abutment frame structure so as to direct the cable from the first pulley means in a direction substantially at right angles to the front surface of the abutment frame structure, means interconnecting the frame means and the abutment frame structure to transmit reaction forces therebetween in response to the pulling force on the cable and means for interconnecting the frame means and the vehicle to communicate said reaction forces therebetween, wherein the winch is mounted on the vehicle separate from the frame means and the abutment frame structure, wherein the frame means comprises a substantially vertical beam, wherein the abutment frame structure comprises a pair of vertical members each for positioning on a respective side of the pipe and at least one transverse member connecting the vertical members, the vertical members and at least one transverse member lying in said substantially planar suface and a plurality of separate connecting members extending from said abutment frame structure to said vertical beam at vertically spaced positions thereon, the first pulley being mounted at a top of the substantially vertical beam and the second pulley means being arranged at a bottom of the substantially vertical beam.
(11) The apparatus according to Claim 10 wherein the winch comprises, a winch drum, a hydraulic drive motor for generating primary force for driving the winch drum and a mechanical transmission system providing a gear reduction for communicating drive from the hydraulic motor to the winch drum.
(1) A method for extracting underground pipe comprising excavating a first and a second opening in the ground to expose a first and a second end of a portion of the pipe, passing a cable through the pipe from the first end to the second end, attaching an abutment member to the cable at the second end so as to engage the second end of the pipe portion, winding the cable onto a winch mounted at the first opening, guiding the cable at the first opening so as to apply a longitudinal pulling force on the pipe portion to pull the pipe portion into the first opening and engaging a side of the opening adjacent the first end to apply a reaction forces from the pulling force to the ground surrounding the pipe wherein the winch is mounted on a vehicle at a position outside the opening and the cable is guided by pulleys from the vehicle into the opening, wherein the pipe is pulled through an initial movement by winding said cable onto the winch while said reaction forces are applied to the ground surrounding the pipe, and wherein the pipe is pulled through a subsequent movement by halting the winding of the cable onto the winch and moving the vehicle away from the opening.
(2) The invention according to Claim 1 wherein the pipe is formed in a plurality of separate sections and wherein the portion includes more than one section.
(3) The invention according to Claim 1 including attaching a plug member behind the abutment member, the plug member having a diameter greater than that of the pipe so as to clean the hole as the pipe is removed.
(4) The invention according to Claim 3 including attaching a new pipe behind the plug member such that the new pipe is pulled into the hole as the old pipe is withdrawn.
(5) The invention according to Claim 4 wherein the new pipe is formed in sections and wherein an abutment member is placed behind each new section in turn as the new pipe section is drawn into place.
(6) The invention according to Claim 1 including providing a hydraulic ram at the second end of the pipe portion and actuatng the ram to provide an additional pushing force against the second end of the pipe portion during at least a first portion of the movement of the pipe portion.
(7) The invention according to Claim 1 including breaking the pipe by pulling an end face of the pipe against a fixed blade.
(8) Apparatus for extracting underground pipe at an excavated hole in the ground at an end of the pipe, the excavated hole having a vertical planar end face through which the pipe projects, the apparatus comprising a vehicle having ground engaging means for movement of the vehicle across the ground, a winch mounted on the vehicle for winding and releasing a cable having a free end remote from the winch, abutment means on the remote end of the cable for engaging a remote end of the pipe to apply a pulling force thereto, an abutment frame structure for mounting in the excavated hole and defining a front substantially planar surface for engaging the end face of the hole, first pulley means arranged to direct the cable from the winch to turn downwardly into the hole, second pulley means, frame means mounting the second pulley means arranged at a position spaced from the abutment frame structure so as to direct the cable from the first pulley means in a direction substantially at right angles to the front surface of the abutment frame structure, means interconnecting the frame means and the abutment frame structure to transmit reaction forces therebetween in response to the pulling force on the cable and means for interconnecting the frame means and the vehicle to communicate said reaction forces therebetween, wherein said means interconnecting the frame means and the vehicle comprises a boom connected to the vehicle and pivotal relative thereto and wherein the winch is mounted upon a longitudinal frame of the vehicle at a position underneath the boom.
(9) The apparatus according to Claim 8 wherein the frame means comprises a substantially vertical beam, wherein the abutment frame structure comprises a pair of vertical members each for positioning on a respective side of the pipe and at least one transverse member connecting the vertical members, the vertical members and at least one transverse member lying in said substantially planar surface and a plurality of separate connecting members extending from said abutment frame structue to said vertical beam at vertically spaced positions thereon, the first pulley being mounted at a top of the substantially vertical beam and the second pulley means being arranged at a bottom of the substantially vertical beam.
(10) Apparatus for extracting underground pipe at an excavated hole in the ground at an end of the pipe, the excavated hole having a vertical planar end face through which the pipe projects, the apparatus comprising a vehicle having ground engaging means for movement of the vehicle across the ground, a winch mounted on the vehicle for winding and releasing a cable having a free end remote from the winch, abutment means on the remote end of the cable for engaging a remote end of the pipe to apply a pulling force thereto, an abutment frame structure for mounting in the excavated hole and defining a front substantially planar surface for engaging the end face of the hole, first pulley means arranged to direct the cable from the winch to turn downwardly into the hole, second pulley means, frame means mounting the second pulley means arranged at a position spaced from the abutment frame structure so as to direct the cable from the first pulley means in a direction substantially at right angles to the front surface of the abutment frame structure, means interconnecting the frame means and the abutment frame structure to transmit reaction forces therebetween in response to the pulling force on the cable and means for interconnecting the frame means and the vehicle to communicate said reaction forces therebetween, wherein the winch is mounted on the vehicle separate from the frame means and the abutment frame structure, wherein the frame means comprises a substantially vertical beam, wherein the abutment frame structure comprises a pair of vertical members each for positioning on a respective side of the pipe and at least one transverse member connecting the vertical members, the vertical members and at least one transverse member lying in said substantially planar suface and a plurality of separate connecting members extending from said abutment frame structure to said vertical beam at vertically spaced positions thereon, the first pulley being mounted at a top of the substantially vertical beam and the second pulley means being arranged at a bottom of the substantially vertical beam.
(11) The apparatus according to Claim 10 wherein the winch comprises, a winch drum, a hydraulic drive motor for generating primary force for driving the winch drum and a mechanical transmission system providing a gear reduction for communicating drive from the hydraulic motor to the winch drum.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA002048390A CA2048390C (en) | 1991-08-02 | 1991-08-02 | Extraction of underground pipe |
| US07/740,098 US5211509A (en) | 1991-08-02 | 1991-08-05 | Extraction of underground pipe |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA002048390A CA2048390C (en) | 1991-08-02 | 1991-08-02 | Extraction of underground pipe |
| US07/740,098 US5211509A (en) | 1991-08-02 | 1991-08-05 | Extraction of underground pipe |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2048390A1 CA2048390A1 (en) | 1993-08-24 |
| CA2048390C true CA2048390C (en) | 1993-08-24 |
Family
ID=25674722
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002048390A Expired - Fee Related CA2048390C (en) | 1991-08-02 | 1991-08-02 | Extraction of underground pipe |
Country Status (2)
| Country | Link |
|---|---|
| US (1) | US5211509A (en) |
| CA (1) | CA2048390C (en) |
Families Citing this family (30)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5674030A (en) * | 1991-08-27 | 1997-10-07 | Sika Equipment Ag. | Device and method for repairing building branch lines in inacessible sewer mains |
| US5482404A (en) * | 1993-07-27 | 1996-01-09 | Tenbusch, Ii; Albert A. | Underground pipe replacement technique |
| US5626442A (en) * | 1995-10-24 | 1997-05-06 | Boyer, Inc. | Pipe rehabilitation system and methods |
| US6494437B1 (en) | 1995-10-24 | 2002-12-17 | Mark L. Boyer | Boom mounted winch |
| WO1998030350A1 (en) * | 1997-01-09 | 1998-07-16 | Robert Ward Carter | Device for trenchless replacement of underground pipe |
| US5913639A (en) * | 1998-01-05 | 1999-06-22 | Ellis; George E. | Mechanized cable puller |
| US6149349A (en) * | 1998-10-14 | 2000-11-21 | Nikiforuk; Nick | Apparatus and method for extracting and replacing buried pipe |
| US6585453B2 (en) | 2001-07-19 | 2003-07-01 | Gerald M. Robinson | Apparatus for trenchless underground pipe replacement |
| US6551028B2 (en) | 2001-09-17 | 2003-04-22 | Gerald M. Robinson | Pipe replacement apparatus |
| US6672802B2 (en) * | 2001-09-24 | 2004-01-06 | Samuel W. Putnam | Vertical pull apparatus |
| US6702521B2 (en) | 2002-06-03 | 2004-03-09 | Gerald M. Robinson | Pipe replacement apparatus |
| US7048257B2 (en) * | 2003-09-19 | 2006-05-23 | Earth Tool Company, L.L.C. | Winch with telescoping mast |
| US7156585B2 (en) * | 2004-02-18 | 2007-01-02 | Pettibone, Llc | Method and apparatus for drawing a mole through a composition |
| US7770869B2 (en) | 2006-05-18 | 2010-08-10 | Tt Technologies, Inc. | Portable winch |
| BR112013013675B1 (en) * | 2010-12-03 | 2021-01-12 | Tric Tools, Inc. | pipe breaking equipment |
| US20120151978A1 (en) * | 2010-12-17 | 2012-06-21 | Zepp William L | Platform Mill for Producing Helically Wound Pipe and Related Method |
| US8540458B2 (en) | 2011-06-14 | 2013-09-24 | Roodle, Inc. | Center hole ram cable puller |
| US9791069B2 (en) | 2011-12-20 | 2017-10-17 | Tt Technologies, Inc. | Frame for trenchless pipe replacement system and method |
| US9261220B2 (en) * | 2012-08-02 | 2016-02-16 | Tt Technologies, Inc. | Winch boom and method for trench less replacement |
| CA2947934A1 (en) * | 2014-05-08 | 2015-11-12 | Jsm Construction Limited | Conveyance member removal method and device |
| US10167986B2 (en) | 2015-09-28 | 2019-01-01 | Tt Technologies, Inc. | Cable puller and method |
| US20180045334A1 (en) * | 2016-08-13 | 2018-02-15 | Joseph Timothy Nippes | Lead service water pipe line removal apparatus and method |
| CN107255188B (en) * | 2017-06-21 | 2019-04-02 | 中国水利水电第七工程局有限公司 | A kind of lifting pipeline method suitable at pipe gallery intersection node |
| US10550961B2 (en) | 2017-08-11 | 2020-02-04 | Joseph Timothy Nippes | Lead service water pipe line removal apparatus and method |
| US10935162B2 (en) * | 2018-04-24 | 2021-03-02 | Tt Technologies, Inc. | Device and method for pulling pipe |
| US11258237B2 (en) * | 2018-07-30 | 2022-02-22 | AIS Construction Equipment Corporation | Cable puller and method of use |
| US10895332B2 (en) | 2018-09-04 | 2021-01-19 | Joseph Timothy Nippes | Lead service water pipe line removal apparatus and method |
| US10464790B1 (en) * | 2018-12-01 | 2019-11-05 | Viorel Gabriel Brutaru | Fiber pulling winch attachment for an excavator bucket |
| US11619336B2 (en) * | 2019-09-16 | 2023-04-04 | The Charles Machine Works, Inc. | Pipe slitting machine with rope storage reel |
| US11913570B1 (en) | 2020-06-02 | 2024-02-27 | The Charles Machine Works, Inc. | System for applying torsional force to a buried pipe to facilitate extraction |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2297164A (en) * | 1941-07-01 | 1942-09-29 | Daniel L Roberts Jr | Pipe replacing apparatus |
| US3907253A (en) * | 1974-06-24 | 1975-09-23 | William O Schosek | Pipe guide means for a rod and pipe pusher |
| CA1216276A (en) * | 1984-08-29 | 1987-01-06 | Martin Coumont | Apparatus and method for extracting horizontal underground pipe |
| US4637756A (en) * | 1985-01-23 | 1987-01-20 | Boles Flounoy W | Apparatus for removing and replacing pipe beneath an earthfill |
| US5013188A (en) * | 1990-04-17 | 1991-05-07 | Campbell David B | Process for replacing a length of buried pipe |
-
1991
- 1991-08-02 CA CA002048390A patent/CA2048390C/en not_active Expired - Fee Related
- 1991-08-05 US US07/740,098 patent/US5211509A/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CA2048390A1 (en) | 1993-08-24 |
| US5211509A (en) | 1993-05-18 |
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| EEER | Examination request | ||
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