US3724862A - Drill head and sealing apparatus therefore - Google Patents
Drill head and sealing apparatus therefore Download PDFInfo
- Publication number
- US3724862A US3724862A US00175153A US3724862DA US3724862A US 3724862 A US3724862 A US 3724862A US 00175153 A US00175153 A US 00175153A US 3724862D A US3724862D A US 3724862DA US 3724862 A US3724862 A US 3724862A
- Authority
- US
- United States
- Prior art keywords
- housing
- annular
- sleeve
- drill head
- packing
- 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 - Lifetime
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Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/02—Surface sealing or packing
- E21B33/08—Wipers; Oil savers
- E21B33/085—Rotatable packing means, e.g. rotating blow-out preventers
-
- 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
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/16—Sealings between relatively-moving surfaces
- F16J15/18—Sealings between relatively-moving surfaces with stuffing-boxes for elastic or plastic packings
- F16J15/184—Tightening mechanisms
- F16J15/185—Tightening mechanisms with continuous adjustment of the compression of the packing
Definitions
- ABSTRACT A drill head assembly for use in oil drilling operations in which there is provided a rotatable packing means for preventing abrasive well fluids or vapors from contacting the bearing surfaces of the rotatable portion of the drilling head and for preventing the escape of well fluids or vapors into the atmosphere.
- the packing means is constructed such that packing becomes tighter as the well pressure increases, thereby performing the function of a final control in the event of a blowout and is also constructed such that repacking may be performed externally to the drilling head without disassembly of the drill head many of the rotatable parts therein.
- This invention relates to a drill head with rotatable packing means contained therein for forming a tight packing between the rotatable and non-rotatable sections of the'drill head, this apparatus is particularly useful for use with a rotary table of the type used in oil well drilling operations.
- Drill heads for use in oil well drilling operations are well known.
- oil well drilling is presently accomplished by rotary drilling.
- This includes a rotary table for driving a rotatable member referred to as a kelley via well known driving means such as a non-circular bushing referred to in the industry as a kelley bushing.
- Attached to one end of the kelley is a drill pipe section which is lowered into the earth by the kelley and rotated by the kelley bushing during the drilling.
- the drill pipe section is raised and another drill pipe section is attached to the previously attached drill pipe forming what is commonly referred to as a drill string.
- the drill string in turn is reattached to the kelley whereupon drilling may be resumed.
- Applicant not only provides such an apparatus, but also provides anapparatus in which this may be accomplished external to the drilling head. Applicant further provides an apparatus which is mechanically simple, easy to maintain yet producing superior results in preventing abrasive well fluids from contacting any rotatable parts.
- the present invention relates to a drill head for use in rotary drilling operations.
- the instant invention is one solution to the problem.
- the design of the drill head along with the packing means prevents any debris, whether it be fluid, vapor or dry, airborne or whatever, from passing through the grease seals and contacting the rotating sections. Further, because of the inherent design of the instant invention, any debris which might be blown out would be directed out into the atmosphere away from the grease seals, bearings, ect.
- the packing means utilized herein are self energizing, i.e., if the internal well pressure increases, the packing means gets proportionally tighter by utilizing the forces generated by the well pressures.
- the drill head consists basically of a lower assembly and an upper assembly.
- the lower assembly is stationery and is usually mounted on a blowout preventer or well casing. It further provides a side outlet for the egress of debris formed by the cuttings and the various drilling muds and lubricants used in the drilling operation.
- the lower assembly also has formed therein a tubular projection finished in a smooth hard chrome finish, usually referred to as a wash'pipe. This tubular projection may or may not be made integral to the lower assembly. For purposes of this specification, it is assumed to be integral to the lower housing, although it would just as easily be a separate unit and threadedly affixed thereto.
- a gland is positioned over the wash pipe and is capable of longitudinal movement thereon.
- the upper housing includes a housing in which is positioned a rotating sleeve, which is also referred to in the trade as a rotating bowl. Interposed between the housing and sleeve are the necessary bearings and lubricating means.
- the upper housing is positioned on the lower housing and because of the inherent design of the apparatus, an annular space is formed between the outside surface of the projecting wash pipe and the inside surface of the rotating sleeve. Into this annular space is positioned the packing material which is used for the sealing means. Pressure is applied on the packing by the longitudinal drawing of the gland into the annular space.
- Means are provided on the bottom of the rotating sleeve for retaining the gland in fixed relation thereto such that the gland rotates with the rotating sleeve.
- a seal is formed when enough pressure is applied on the packing means by the adjustable gland. This seal becomes a rotatable seal when the sleeve is given rotation by some driver.
- Also provided in this invention are means for further securing a seal, particularly in the event of a blowout.
- a seal particularly in the event of a blowout.
- the annular groove opens up directly above the packing material.
- any pressures existing in the well will be directed immediately on top of the packing material via the inlets and annular groove. This direction is in direct opposition to the pressure directed by the gland resulting in the horizontal expansion of the packing material thereby further increasing the seal.
- FIG. 1 is a view of the drill head shown in cross section.
- FIG. 2 is an enlarged crossectional view taken of the upper drill head assembly.
- FIG. 3 is an enlarged crossectional view taken of one portion of the wash pipe and packing gland follower.
- FIG. 1 illustrates a drill head comprising a lower assembly 12 and an upper assembly 14, which is the subject of the present invention.
- the drill head 10 in operation, is mounted to the upper end of a well casing (not shown) or mechanical blowout preventers by conventional means such as a mounting flange 16.
- a kelley (not shown) is passed downwardly. through the drill head 10, the drill string being attached to the kelley.
- Attached to the mounting flange 16 is a lower housing 18 which may be attached to the mounting flange 16 by means such as welding.
- the lower housing 18 is provided on its exterior walls, for reinforcement, with a plurality of mounting struts 20 which are attached to a flange 22.
- the flange 22 contains a plurality of holes therethrough.
- the .inside diameter of the mounting flange 22 is greater than the outside diameter of the lower housing 18 such that an annular space is formed between the outside wall surface of the lower housing 18 and the inside wall surface of the mounting flange 22.
- a packing gland follower ring 28 is adapted to fit in the annular space formed by the housing 18 and the mounting flange 22..
- Integral to the interior of the housing 18 is a wash pipe 30 which may be machined from the metal forming the housing 18 down to a hard bored smooth chrome finish.
- the wash pipe section begins at the shoulder 32 machined on the lower housing 18. If desired the wash pipe 30 could be a separable member and attached to the housing 18 by conventional thread means.
- the outside diameter of the wash pipe 30 is smaller than the inside diameter of the packing gland follower 28 such that the packing gland 28 can be easily moved longitudinally up and down the wash pipe 30.
- the housing 18 is further provided with a side outlet tube 24 mounted thereon by conventional means such as welding. On the extreme end of the side outlet tube 24 is a side outlet flange 26. In the operation of the drill head 10, the cuttings, debris and fluids are exited from the well via the side outlet tube 24.
- the upper assembly 14 includes the rotating parts of the drill head 10 and may be assembled separately prior to being mounted on the upper mounting flange 22.
- the upper assembly 14 includes a bearing housing spacer tube34. Attached to the upper and lower ends of the bearing housing tube 34 are flanges 36 and 38 respectively which are held'in place by a plurality of upper assembly retaining bolts 40. The retaining bolts 40 are placed in position only after the complete assembly of the upper assembly 14.
- a rotating sleeve 42 is mounted within the annulus formed by the interior of the bearing housing spacer 34.
- the opening formed within the rotating sleeve 42 narrows at 104, which is located towards the bottom of the sleeve 42.
- a projection 102 is formed at the bottom edge of the sleeve 42.
- Means for receivingthreaded bolts are provided on both the upper and lower edges of the sleeve 42.
- the lower flange 38 is provided with a shoulder 44 on its interior surface in which rests an outer race member 46 which acts as a track for bearings 48a.
- the bearings 48a are received within a seat 50 of an inner race member 52 which engages a shoulder 54 formed on the lower exterior surface of the sleeve 42.
- the bearings used in the preferred embodiment are preferably of the roller tapered type having both thrust and radial capabilities.
- the upper flange 36 is provided with a shoulder 56 on its interior surface in which rests an outer race member 58 which acts as a track for bearings 48b which are received within a seat 60 of an inner race member 62 which engages a shoulder 64 formed at the upper exterior surface of the rotating sleeve 42.
- the upper assembly 14 is held together by the upper assembly retaining bolts 40. These bolts merely serve to hold the upper assembly 14-together should it be necessary to remove the upper assembly 14 from the lower assembly 12.
- the annular space formed by the inside wall of the bearing housing spacer 34 and the outside wall of the sleeve 42 is filled with some form of lubricant via, con ventional grease fittings or circulating coolant and or lubricant circulated by external mechanical means.
- the flanges 36, 38, and 22 are provided with a plurality of holes for receiving hold down bolts 74 when the holes are in alignment, these bolts should be fabricated from a hard tempered steel and are utilized to hold the upper assembly 14 to the lower assembly. Great strength is a characteristic necessary for the hold down bolts 74, for they are utilized to transfer any thrust generated against the rotating sleeve 42 down to the well head via the struts 20.
- a resilient mass 76 having a cap 78 at one end and an elongated taper at the other end and an opening formed through the longitudinal axis of the mass 76 forms what is commonly referred to as drilling rubber, this usually is a steel reinforced rubber.
- the cap 78 is adapted to rest on a shoulder 80 within the opening formed by an annular lip 82 on the upper interior wall of the sleeve 42.
- a metallic collar 84 having an annular recess formed by a shoulder 86 is designed to be placed over the drilling rubber 76 when seated on the shoulder 80 and is fixed to the rotating sleeve 42. by bolt means 88, thereby also compressively holding the drilling rubber to the rotating sleeve 42.
- the drill head has a kelley, passed downwardly through the drilling rubber 76 into the well casing which is of course rigid.
- the drilling rubber 76 provides a tight fit for the kelley thereby sealing the well pressure from the atmosphere. Because of the inherent design of the drilling rubber 76, the greater the interior well pressure, the greater the seal becomes between the .drilling rubber 76 and the kelley.
- the upper assembly 14 is mounted on thelower assembly by the mounting bolts 74.'There is thus formed an annular void between the shoulder 102 formed on the bottom of sleeve 42 and the outside surface at the upper extremity of the wash pipe 30. Into this void is packed a packing material 90 such as braided Teflon.
- the packing gland follower 28 is adapted to fit into the void for the application of compression on the packing material 90 and is held in place by adjusting bolts 92 which are threadedly fixed into the bottom of the sleeve 42. The tighter that the bolts 92 are made, the greater the compression, therefore the greater the seal which exists between the sleeve 42 and the wash pipe 30.
- gap 94 formed between the lower end of the sleeve 42 and the upper end of the wash pipe 30.
- the size for the gap is determined by the upper assembly 14 and is of a size approximating 0.004 inch, if necessary, conventional shims may be used in order to provide a gap.
- the sleeve 42 is caused to be rotated by the kelley.
- the packing gland follower 28 is constrained to rotate with the sleeve by the bolts 92.
- FIG. 2 illustrates the groove 96 connected to a plurality of what are referred to as pressure inlets 98.
- the pressure inlets 98 originate from the interior of the annulus 100, in other words, the pressure inlets 98 are in communication with whatever exists in the annulus 100, which in turn is in communication with the well. Initially, because of pressure applied by the packing gland follower-28, some of the packing 90 will flow into the gap 94 (FIG. 3).
- first annular housing adapted to concentrically receive said annular sleeve, thereby forming a chamber between said annular sleeve and said first annular housing;
- a second housing adapted to receive said first annular housing and said annular sleeve in a manner such that an annulus is formed between said annular sleeve and said second housing;
- a drill head according to claim 4 whereinsaid second housing includes a wash pipe such that when said second. housing receives said first annular housing, the outside wall of said wash pipe and the inside wall of said annular sleeve define said annulus.
- a drill head according to claim 1 wherein said means for directing any generated internal forces onto said packing means comprises an annular groove formed on the ,bottom end of the annular sleeve, said annular groove being connected to a plurality of inlets, said inlets being in communication with the annular chamber formed through said drill head.
- said packing means comprises an annular gland, wherein said annular gland has an inside diameter greater than the outside diameter of said wash pipe and positioned such that it encircles a portion of said second housing at the upper extremity thereof and is capable of Iongitudinal movement about said wash pipe.
- a drill head according to claim 9 wherein said means for applying pressure on said packing means is provided by said annular gland having a shoulder formed thereon, said shoulder being of a dimension and size such that said annulus formed between said annu-- lar sleeve and said second housing being adapted to receive said shoulder.
- a drill head according to claim 1 wherein said means for capping comprises an elongated resilient steel reinforced mass having an opening therethrough along the longitudinal axis thereof for the reception of said rotating driving member, the exterior of said resilient mass being tapered inwardly in a downwardly direction, said means for capping thereby providing a constrictive seal about said driving member extending therethrough and insuring a tighter seal upon the appli cation of any pressurized fluids thereto, said mass retained on said annular sleeve by compression means.
- first stationery housing including a tubular projection at the upper extremity thereof and also including an outlet tube for the egress of well fluids, cuttings and the like, said stationery housing having means for affixing same to a well casing; second stationery housing, adapted for mounting on said first stationary housing; rotatable sleeve member concentrically disposed within said second stationery housing, said second stationery housing adapted for mounting on said first stationery housing thereby forming an annulus between said sleeve member and said tubular pro jection; bearing means interposed between said rotatable sleeve and said second stationery housing; means for lubricating said bearing means; packing means positioned in said annulus; an adjustable gland to regulate the compression of said packing means in a first direction thereby forming a rotating hermetic seal between said rotating sleeve and said tubular projection, said adjustable gland being in fixed relationship with said rotatable sleeve;
- capping means for the upper extremity of said rotating sleeve member, said capping means adapted to receive a driving member and further providing a seal between said drill head and said driving member;
- a drill head according to claim 14 wherein said means for directing any internal well pressures onto said packing, means comprises an annular groove formed on the bottom edge of said rotatable sleeve, said annular groove positioned immediately adjacent the upper portion of said packing means and said annular groove being further connected to a plurality of inlets, said inlets being in communication with any. generated well pressures.
- a drill head according to claim wherein said adjustable gland has an inside diameter greater than the outside diameter of said tubular projection and positioned such that said gland encircles said tubular projection and is adjustably affixed to said rotating sleeve and is rotatable therewith.
- a drill head having an annular chamber formed therethrough in communication with any existing well pressures, said annular chamber adapted to receive a rotatable driver member for use in conventional and well drilling operations, comprising:
- first stationery housing including a hard smooth tubular projection at the upper extremity thereof, said first stationery housing further including an outlet for the egress of internal well wastes and also including means for affixing said stationery housing to-a well casing;
- a second stationary housing adapted for mounting on said first stationary housing
- capping means for the upper extremity of said rotating sleeve member, said capping means adapted to receive a driving member and further providing a seal between said drill head and said driving member;
- annular groove and a plurality of inlets formed on the bottom edge of said sleeve member, said annular groove being connected to said inlets, said inlets being in communication with the well chamber whereby any generated forces are directed through said inlets to said groove and applied directly to said packing means by said groove, said forces being directed onto said packing means in a direction opposing said first direction.
Abstract
Description
Claims (17)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US17515371A | 1971-08-21 | 1971-08-21 |
Publications (1)
Publication Number | Publication Date |
---|---|
US3724862A true US3724862A (en) | 1973-04-03 |
Family
ID=22639142
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US00175153A Expired - Lifetime US3724862A (en) | 1971-08-21 | 1971-08-26 | Drill head and sealing apparatus therefore |
Country Status (2)
Country | Link |
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US (1) | US3724862A (en) |
CA (1) | CA971552A (en) |
Cited By (32)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3868832A (en) * | 1973-03-08 | 1975-03-04 | Morris S Biffle | Rotary drilling head assembly |
US3934887A (en) * | 1975-01-30 | 1976-01-27 | Dresser Industries, Inc. | Rotary drilling head assembly |
US3965987A (en) * | 1973-03-08 | 1976-06-29 | Dresser Industries, Inc. | Method of sealing the annulus between a toolstring and casing head |
US4281724A (en) * | 1979-08-24 | 1981-08-04 | Smith International, Inc. | Drilling head |
US4538819A (en) * | 1980-09-19 | 1985-09-03 | Siemens-Allis, Inc. | Lead gasket for electric motors |
US4955436A (en) * | 1989-12-18 | 1990-09-11 | Johnston Vaughn R | Seal apparatus |
US5137084A (en) * | 1990-12-20 | 1992-08-11 | The Sydco System, Inc. | Rotating head |
US5409073A (en) * | 1992-10-22 | 1995-04-25 | The Sydco System | Rotating head with elastomeric member rotating assembly |
US5647444A (en) * | 1992-09-18 | 1997-07-15 | Williams; John R. | Rotating blowout preventor |
US5662181A (en) * | 1992-09-30 | 1997-09-02 | Williams; John R. | Rotating blowout preventer |
US6109348A (en) * | 1996-08-23 | 2000-08-29 | Caraway; Miles F. | Rotating blowout preventer |
US6138774A (en) * | 1998-03-02 | 2000-10-31 | Weatherford Holding U.S., Inc. | Method and apparatus for drilling a borehole into a subsea abnormal pore pressure environment |
US6263982B1 (en) | 1998-03-02 | 2001-07-24 | Weatherford Holding U.S., Inc. | Method and system for return of drilling fluid from a sealed marine riser to a floating drilling rig while drilling |
US6354385B1 (en) * | 2000-01-10 | 2002-03-12 | Smith International, Inc. | Rotary drilling head assembly |
US6470975B1 (en) | 1999-03-02 | 2002-10-29 | Weatherford/Lamb, Inc. | Internal riser rotating control head |
US20040178001A1 (en) * | 1998-03-02 | 2004-09-16 | Weatherford/Lamb, Inc. | Method and system for return of drilling fluid from a sealed marine riser to a floating drilling rig while drilling |
US20050061546A1 (en) * | 2003-09-19 | 2005-03-24 | Weatherford/Lamb, Inc. | Method for pressurized mud cap and reverse circulation drilling from a floating drilling rig using a sealed marine riser |
US20060108119A1 (en) * | 2004-11-23 | 2006-05-25 | Weatherford/Lamb, Inc. | Riser rotating control device |
US7836946B2 (en) | 2002-10-31 | 2010-11-23 | Weatherford/Lamb, Inc. | Rotating control head radial seal protection and leak detection systems |
US7926593B2 (en) | 2004-11-23 | 2011-04-19 | Weatherford/Lamb, Inc. | Rotating control device docking station |
US7997345B2 (en) | 2007-10-19 | 2011-08-16 | Weatherford/Lamb, Inc. | Universal marine diverter converter |
US20120073113A1 (en) * | 2010-09-28 | 2012-03-29 | Smith International, Inc. | Adaptor flange for rotary control device |
US8286734B2 (en) | 2007-10-23 | 2012-10-16 | Weatherford/Lamb, Inc. | Low profile rotating control device |
US8322432B2 (en) | 2009-01-15 | 2012-12-04 | Weatherford/Lamb, Inc. | Subsea internal riser rotating control device system and method |
US8347982B2 (en) | 2010-04-16 | 2013-01-08 | Weatherford/Lamb, Inc. | System and method for managing heave pressure from a floating rig |
US8347983B2 (en) | 2009-07-31 | 2013-01-08 | Weatherford/Lamb, Inc. | Drilling with a high pressure rotating control device |
US8826988B2 (en) | 2004-11-23 | 2014-09-09 | Weatherford/Lamb, Inc. | Latch position indicator system and method |
US8844652B2 (en) | 2007-10-23 | 2014-09-30 | Weatherford/Lamb, Inc. | Interlocking low profile rotating control device |
US9175542B2 (en) | 2010-06-28 | 2015-11-03 | Weatherford/Lamb, Inc. | Lubricating seal for use with a tubular |
US9359853B2 (en) | 2009-01-15 | 2016-06-07 | Weatherford Technology Holdings, Llc | Acoustically controlled subsea latching and sealing system and method for an oilfield device |
US10041335B2 (en) | 2008-03-07 | 2018-08-07 | Weatherford Technology Holdings, Llc | Switching device for, and a method of switching, a downhole tool |
US10385646B1 (en) * | 2013-03-15 | 2019-08-20 | Pruitt Tool & Supply Co. | Sealed grease head and top drive guide |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2243439A (en) * | 1938-01-18 | 1941-05-27 | Guiberson Corp | Pressure drilling head |
US2904357A (en) * | 1958-03-10 | 1959-09-15 | Hydril Co | Rotatable well pressure seal |
US3023012A (en) * | 1959-06-09 | 1962-02-27 | Shaffer Tool Works | Submarine drilling head and blowout preventer |
US3529835A (en) * | 1969-05-15 | 1970-09-22 | Hydril Co | Kelly packer and lubricator |
-
1971
- 1971-08-26 US US00175153A patent/US3724862A/en not_active Expired - Lifetime
-
1972
- 1972-07-13 CA CA147,072A patent/CA971552A/en not_active Expired
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2243439A (en) * | 1938-01-18 | 1941-05-27 | Guiberson Corp | Pressure drilling head |
US2904357A (en) * | 1958-03-10 | 1959-09-15 | Hydril Co | Rotatable well pressure seal |
US3023012A (en) * | 1959-06-09 | 1962-02-27 | Shaffer Tool Works | Submarine drilling head and blowout preventer |
US3529835A (en) * | 1969-05-15 | 1970-09-22 | Hydril Co | Kelly packer and lubricator |
Cited By (52)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3868832A (en) * | 1973-03-08 | 1975-03-04 | Morris S Biffle | Rotary drilling head assembly |
US3965987A (en) * | 1973-03-08 | 1976-06-29 | Dresser Industries, Inc. | Method of sealing the annulus between a toolstring and casing head |
US3934887A (en) * | 1975-01-30 | 1976-01-27 | Dresser Industries, Inc. | Rotary drilling head assembly |
FR2299493A1 (en) * | 1975-01-30 | 1976-08-27 | Dresser Ind | ROTARY DRILLING TUBING HEAD ASSEMBLY |
US4281724A (en) * | 1979-08-24 | 1981-08-04 | Smith International, Inc. | Drilling head |
US4538819A (en) * | 1980-09-19 | 1985-09-03 | Siemens-Allis, Inc. | Lead gasket for electric motors |
US4955436A (en) * | 1989-12-18 | 1990-09-11 | Johnston Vaughn R | Seal apparatus |
US5137084A (en) * | 1990-12-20 | 1992-08-11 | The Sydco System, Inc. | Rotating head |
US5647444A (en) * | 1992-09-18 | 1997-07-15 | Williams; John R. | Rotating blowout preventor |
US5662181A (en) * | 1992-09-30 | 1997-09-02 | Williams; John R. | Rotating blowout preventer |
US5409073A (en) * | 1992-10-22 | 1995-04-25 | The Sydco System | Rotating head with elastomeric member rotating assembly |
US6109348A (en) * | 1996-08-23 | 2000-08-29 | Caraway; Miles F. | Rotating blowout preventer |
US20040178001A1 (en) * | 1998-03-02 | 2004-09-16 | Weatherford/Lamb, Inc. | Method and system for return of drilling fluid from a sealed marine riser to a floating drilling rig while drilling |
US6263982B1 (en) | 1998-03-02 | 2001-07-24 | Weatherford Holding U.S., Inc. | Method and system for return of drilling fluid from a sealed marine riser to a floating drilling rig while drilling |
US6138774A (en) * | 1998-03-02 | 2000-10-31 | Weatherford Holding U.S., Inc. | Method and apparatus for drilling a borehole into a subsea abnormal pore pressure environment |
US6470975B1 (en) | 1999-03-02 | 2002-10-29 | Weatherford/Lamb, Inc. | Internal riser rotating control head |
US6354385B1 (en) * | 2000-01-10 | 2002-03-12 | Smith International, Inc. | Rotary drilling head assembly |
US8113291B2 (en) | 2002-10-31 | 2012-02-14 | Weatherford/Lamb, Inc. | Leak detection method for a rotating control head bearing assembly and its latch assembly using a comparator |
US8714240B2 (en) | 2002-10-31 | 2014-05-06 | Weatherford/Lamb, Inc. | Method for cooling a rotating control device |
US7836946B2 (en) | 2002-10-31 | 2010-11-23 | Weatherford/Lamb, Inc. | Rotating control head radial seal protection and leak detection systems |
US8353337B2 (en) | 2002-10-31 | 2013-01-15 | Weatherford/Lamb, Inc. | Method for cooling a rotating control head |
US7934545B2 (en) | 2002-10-31 | 2011-05-03 | Weatherford/Lamb, Inc. | Rotating control head leak detection systems |
US20050061546A1 (en) * | 2003-09-19 | 2005-03-24 | Weatherford/Lamb, Inc. | Method for pressurized mud cap and reverse circulation drilling from a floating drilling rig using a sealed marine riser |
US20060108119A1 (en) * | 2004-11-23 | 2006-05-25 | Weatherford/Lamb, Inc. | Riser rotating control device |
US10024154B2 (en) | 2004-11-23 | 2018-07-17 | Weatherford Technology Holdings, Llc | Latch position indicator system and method |
US9784073B2 (en) | 2004-11-23 | 2017-10-10 | Weatherford Technology Holdings, Llc | Rotating control device docking station |
US9404346B2 (en) | 2004-11-23 | 2016-08-02 | Weatherford Technology Holdings, Llc | Latch position indicator system and method |
US8939235B2 (en) | 2004-11-23 | 2015-01-27 | Weatherford/Lamb, Inc. | Rotating control device docking station |
US7926593B2 (en) | 2004-11-23 | 2011-04-19 | Weatherford/Lamb, Inc. | Rotating control device docking station |
US8408297B2 (en) | 2004-11-23 | 2013-04-02 | Weatherford/Lamb, Inc. | Remote operation of an oilfield device |
US8826988B2 (en) | 2004-11-23 | 2014-09-09 | Weatherford/Lamb, Inc. | Latch position indicator system and method |
US8701796B2 (en) | 2004-11-23 | 2014-04-22 | Weatherford/Lamb, Inc. | System for drilling a borehole |
US7997345B2 (en) | 2007-10-19 | 2011-08-16 | Weatherford/Lamb, Inc. | Universal marine diverter converter |
US9004181B2 (en) | 2007-10-23 | 2015-04-14 | Weatherford/Lamb, Inc. | Low profile rotating control device |
US10087701B2 (en) | 2007-10-23 | 2018-10-02 | Weatherford Technology Holdings, Llc | Low profile rotating control device |
US8844652B2 (en) | 2007-10-23 | 2014-09-30 | Weatherford/Lamb, Inc. | Interlocking low profile rotating control device |
US8286734B2 (en) | 2007-10-23 | 2012-10-16 | Weatherford/Lamb, Inc. | Low profile rotating control device |
US10041335B2 (en) | 2008-03-07 | 2018-08-07 | Weatherford Technology Holdings, Llc | Switching device for, and a method of switching, a downhole tool |
US9359853B2 (en) | 2009-01-15 | 2016-06-07 | Weatherford Technology Holdings, Llc | Acoustically controlled subsea latching and sealing system and method for an oilfield device |
US8770297B2 (en) | 2009-01-15 | 2014-07-08 | Weatherford/Lamb, Inc. | Subsea internal riser rotating control head seal assembly |
US8322432B2 (en) | 2009-01-15 | 2012-12-04 | Weatherford/Lamb, Inc. | Subsea internal riser rotating control device system and method |
US8347983B2 (en) | 2009-07-31 | 2013-01-08 | Weatherford/Lamb, Inc. | Drilling with a high pressure rotating control device |
US9334711B2 (en) | 2009-07-31 | 2016-05-10 | Weatherford Technology Holdings, Llc | System and method for cooling a rotating control device |
US8636087B2 (en) | 2009-07-31 | 2014-01-28 | Weatherford/Lamb, Inc. | Rotating control system and method for providing a differential pressure |
US9260927B2 (en) | 2010-04-16 | 2016-02-16 | Weatherford Technology Holdings, Llc | System and method for managing heave pressure from a floating rig |
US8347982B2 (en) | 2010-04-16 | 2013-01-08 | Weatherford/Lamb, Inc. | System and method for managing heave pressure from a floating rig |
US8863858B2 (en) | 2010-04-16 | 2014-10-21 | Weatherford/Lamb, Inc. | System and method for managing heave pressure from a floating rig |
US9175542B2 (en) | 2010-06-28 | 2015-11-03 | Weatherford/Lamb, Inc. | Lubricating seal for use with a tubular |
US9038729B2 (en) * | 2010-09-28 | 2015-05-26 | Smith International, Inc. | Adaptor flange for rotary control device |
US20120073113A1 (en) * | 2010-09-28 | 2012-03-29 | Smith International, Inc. | Adaptor flange for rotary control device |
US10385646B1 (en) * | 2013-03-15 | 2019-08-20 | Pruitt Tool & Supply Co. | Sealed grease head and top drive guide |
US11215025B1 (en) * | 2013-03-15 | 2022-01-04 | Pruitt Tool & Supply Co. | Sealed grease head and top drive guide |
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