CN101514619B - Novel direct circulation well cementing device and well cementing method for high-pressure gas underground gas storage well - Google Patents

Novel direct circulation well cementing device and well cementing method for high-pressure gas underground gas storage well Download PDF

Info

Publication number
CN101514619B
CN101514619B CN2009100588686A CN200910058868A CN101514619B CN 101514619 B CN101514619 B CN 101514619B CN 2009100588686 A CN2009100588686 A CN 2009100588686A CN 200910058868 A CN200910058868 A CN 200910058868A CN 101514619 B CN101514619 B CN 101514619B
Authority
CN
China
Prior art keywords
plug
well
head
sealing
drilling rod
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
Application number
CN2009100588686A
Other languages
Chinese (zh)
Other versions
CN101514619A (en
Inventor
王健
黄林
唐贵华
宁望正
吴小和
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Zigong Huaqi Technology Co ltd
Original Assignee
HUAQI SCIENCE & TECHNOLOGY DEVELOPMENT Co Ltd ZIGONG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by HUAQI SCIENCE & TECHNOLOGY DEVELOPMENT Co Ltd ZIGONG filed Critical HUAQI SCIENCE & TECHNOLOGY DEVELOPMENT Co Ltd ZIGONG
Priority to CN2009100588686A priority Critical patent/CN101514619B/en
Publication of CN101514619A publication Critical patent/CN101514619A/en
Application granted granted Critical
Publication of CN101514619B publication Critical patent/CN101514619B/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Abstract

A novel direct circulation well cementing device and a well cementing method for a high-pressure gas underground gas storage well are characterized in that the well cementing device is composed of a bottom seal head (1), a stainless steel plug (2), a plug press rod (3), a second plug (4), a casing joint (5), a sealing ring (6), a bolt (7) and a well cementing connecting head (8); the second plug (4) is sleeved at the outside of the upper end of the plug press rod (3), and the casing joint (5) is sleeved at the outer circle of the upper section of the bottom seal head (1). The invention realizes the dual-sealing and leads the sealing to be more reliable and safer, and the first sealing adopts the cone sealing and the second sealing adopts 3-5 time sleeve button sealing. When in well cementing, a connecting well cementing pump pours cement slurry in, and the cement slurry enters space of an outer ring of a gas storage steel pipe from a hole (11) formed at the bottom part of the bottom seal head (1) to fill up the whole space of the outer ring, thereby realizing the direct circulation well cementing.

Description

Direct circulation cementing unit and cementing method that well for storage of high pressure gas is novel
Technical field
The present invention relates to high-pressure gas storage well and carry out a kind of direct circulation cementing unit and cementing method in the empty cementing practice process of gas storage well steel pipe pit shaft outer shroud.
Background technology
Store the well for storage of high pressure gas plurality of advantages such as other caissons are safe owing to having relatively, and risk is low of compressed natural gas, be widely used in places such as CNG gas station, city gas peak regulation station.Gas storage well has developed swift and violent since 2002 include the national standard standard in the whole nation; Because oil price promotion in recent years; Natural gas makes its purposes very extensive as alternative energy source of oil not only environmental protection but also economy, replaced gas bomb, the gasholder status at gas station, peak regulation station at present basically.
As influencing the gas storage well crucial worker of the security of operation preface " well cementation " of constructing in the future in the gas storage well building course, the cementing method that in present work progress, adopts, all in various degree exist the deficiency that some are difficult to overcome.
The kind and the deficiency of existing gas storage well cementing method:
1. utilize soft plain boiled water band to realize well cementation from the outer annular space of sleeve pipe, there is following shortcoming in this kind well cementation:
1. carelessness and the error owing to the operator causes the damage to the plain boiled water band easily in the setting of casing process.
2. this kind cementing method is to the having relatively high expectations of stratum, generally be applicable to earth formation more stable and can guarantee cementing quality preferably during for the stratum of light weight mud drilling well.Otherwise instead then.But it is low that the advantage of this kind well cementation is a difficulty of construction, and low and quality pit shaft of cost is guaranteed easily.
3. plain boiled water band self intensity is low, and difficulty satisfies the requirement of gas storage well to well depth.
2. utilize drilling rod to realize the direct circulation well cementation; This mode should be the developing direction of present gas storage well cementing method; But because will be in bottom (head) perforate and realization shutoff, difficulty of design and construction is all very big, and all there is deficiency in therefore at present existing several kinds of direct circulations well cementation mode:
1. residual cement cleans the airtight quality of influence to bottom (head) than difficulty in the well of well cementation back.
2. generally after well cementation, be mostly to realize shutoff to bottom (head) with plug, owing to the degree of depth reason of well, on detain difficulty and cause cross threading more easily, and the influence sealing is prone to leak.
3. to the operation require high.Because operator's carelessness and error will cause gas storage well and gas storage well well location to scrap easily because of pressure testing is defective enormous economic loss, construction risk is high.
Summary of the invention
The object of the invention just provides the novel direct circulation cementing unit of a kind of well for storage of high pressure gas.This device is the important innovation to several kinds of present cementing units; Except realizing that cementing quality of the present invention well, sealing is high, can secondary seal; Well cementation back cement paste is pollution-free etc. to gas storage well steel pipe inwall, greatly reduces the risk that the gas storage well construction is scrapped.
Another object of the present invention provides the novel direct circulation cementing method of a kind of well for storage of high pressure gas.
The direct circulation cementing unit that well for storage of high pressure gas is novel is characterized in that: be made up of bottom (head) 1, stainless steel plug 2, plug depression bar 3, the second road plug 4, casing coupling 5, sealing ring 6, bolt 7; The bottom of bottom (head) 1 is porose 11, and the bottom cylinder of stainless steel plug 2 is identical with the diameter in hole 11 and put in the hole 11, and the cylinder outer ring, bottom of stainless steel plug 2 is equipped with sealing ring 6; The middle part of stainless steel plug 2 is tapered; The upper end of stainless steel plug 2 is connected with bolt 7 with the bottom of plug depression bar 3, and the inner ring of plug depression bar 3 is a drum, and sealing ring 10 is installed in the epimere outer ring of plug depression bar 3; There is screw thread 31 outer ring, stage casing of plug depression bar 3, and there is screw thread 31 in the stage casing of bottom (head) 1 inwall; The second road plug 4 be shaped as the cylinder hat, the second road plug 4 is socketed in that the upper end of plug depression bar 3 is outside, the top of the second road plug 4 is fixedly connected nut 12, the slip joint casing box cupling 5 in the epimere outer ring of bottom (head) 1.
The direct circulation cementing unit that described well for storage of high pressure gas is novel is characterized in that: the plug of specification when the second road plug 4 is 3-5.
The direct circulation cementing unit that described well for storage of high pressure gas is novel is characterized in that: well cementation connector 8 is sleeve-shaped, and the upper end of well cementation connector 8 is the horn mouth shape, and screw thread 81 is arranged on the horn mouth, and the well cementation connector is outside equipped with sealing ring 10 in 8 lower ends.
The direct circulation cementing method that well for storage of high pressure gas is novel is characterized in that: carry out following steps in order
Step 1, brill vertical shaft; The dark 20-300 rice of vertical shaft;
Step 2, in floor-mounted, vertically after the assembling, the plug depression bar 3 of screwing compresses stainless steel plug 2 in the hole 11 of bottom (head) 1 with bottom (head) 1, stainless steel plug 2, plug depression bar 3, box cupling 5; The second road plug 4 is not installed before the well cementation.
Step 3, carry out the hydrostatic test on ground: connect pipeline on ground and carry out the water pressure testing, the assembly of the bottom (head) 1 that assembles, stainless steel plug 2, plug depression bar 3 is carried out the hydrostatic test, to hydraulic pressure be 33Mpa-42Mpa; Voltage stabilizing 10-50 minute; It is qualified detecting leakproof, if hydraulic pressure is defective, explain that bottom (head) 1 and stainless steel plug 2 are off quality or install defective; Change bottom (head) 1 and stainless steel plug 2, carry out the hydrostatic test after reinstalling until qualified;
Step 4, cementing unit is installed in well, with the assembly of the bottom (head) that assembles 1, stainless steel plug 2, plug depression bar 3 along the shaft bottom of falling under the well head; Carry out casing job then: confirm the number of casing coupling 5 and steel pipe casing coupling 5 to be enclosed within on the bottom (head) 1 according to the degree of depth of well, with steel pipe socket on casing coupling 5, mounting sleeve box cupling 5 and steel pipe step by step in order;
Step 5, make a strength test, mainly detect the intensity of sleeve pipe, water pipe is poured water in well from ground, and progressively being forced into hydraulic pressure is 33Mpa-42Mpa; Voltage stabilizing 3-8 hour, it was qualified that hydraulic pressure does not have pressure drop; If defective, then take out sleeve pipe, casing replacing more is in case gas storage well and sleeve pipe scrap, until qualified;
Step 6, carry out the direct circulation well cementing operation, carry out according to the following steps:
A, the connector 8 of will cementing the well are enclosed within on the plug depression bar 3,
When B, well cementation, rotary drill rod is connected drilling rod with well cementation connector 8; Joint face is at screw thread 81 places, and drilling rod down arrives shaft bottom with drilling rod by root with after well cementation connector 8 is connected; It is fastening that drilling rod is connected, and well cementation connector 8 is a sleeve-shaped, and the upper end of well cementation connector 8 is screw thread 81 connector shapes; During well cementation, with Type B pincers every drilling rod is tightened in the going down process, get into the top such as the shown position of plug depression bars 3, be outside equipped with sealing ring 10 in the well cementation connector 8 and be used for the shutoff cement paste and prevent in the cement paste entering sleeve pipe through well cementation connector 8 front ends guiding 82;
C, counter-rotating drilling rod withdraw from stainless steel plug 2 in the bottom outlet 11 of bottom (head) 1; (moving back button length is controlled at about 30mm--60mm; Do not thread off to guarantee plug depression bar 3 and bottom (head) 1), connecting the well cementation pump will grout in, along the diagram direction of arrow; Grout in from the top down and be followed successively by: the outside 23 of the hole 11--bottom (head) 1 of inner chamber 22--bottom (head) 1 bottom of the hole 9--bottom (head) 1 on the inner chamber 31--plug depression bar 3 of the inner chamber 83--plug depression bar 3 of well cementation special joint 8; Until injecting gas storage steel pipe outer annular space, fill whole outer annular space, thereby realize the direct circulation well cementation;
After D, well cementation are accomplished, inject clear water and replace out cement paste in the drilling rod, clean drilling rod and bottom (head) bottom outlet 11; The clear water amount is greater than the drilling rod internal volume; After shutting surface water mud pipeline valve, prevent that cement paste from returning in the drilling rod, is rotated in the forward drilling rod; Tighten plug depression bar 3 to compress stainless steel plug 2, realize sealing for the first time; On carry drilling rod and take out drilling rod, take out well cementation connector 8;
Step 7, sealing for the second time: the plug when the second road plug 4 is 3-5 for specification; Become the conical surface seal plug; Its sealing principle is with sealing for the first time, and its structure is that buckle in the cover pipe range garden when screw thread partly is 3-5; Sealing is high, and the second road plug, 4 front ends are provided with guide end 13 and are not easy thread alternating when guaranteeing to detain; Through drilling rod the second road plug 4 is sent in the well, be rotated in the forward drilling rod, tighten screw thread, moment of torsion meets API moment of torsion standard-required; Because the effect of sealing is for the first time arranged, and cement paste there should be no return in the gas storage steel pipe, therefore guaranteed the cleaning and the sealing effectiveness of screw thread part.
The direct circulation cementing method that well for storage of high pressure gas is novel the invention has the beneficial effects as follows with original compared with techniques:
1. be different from and lean on traditional direct circulation cementing unit to lean on the back pressure valve sealing, the present invention guarantees that drilling mud does not return in the sleeve pipe in the setting of casing process, has greatly improved gas storage well sealing, reliability.
2. be different from traditional direct circulation well cementation and need on the shaft bottom, occurring thread alternating easily, the great risk that causes sleeve pipe and well location to scrap by button after the well cementation.The present invention seals for the first time because when button was moved back in well cementation, plug depression bar 3 was not threaded off with bottom (head) 1, and easy thread alternating causes the useless great risk of gas storage steel pipe crossfire when therefore having avoided shaft bottom, traditional direct circulation well cementation back make-up.
3. the present invention is because its special construction, prevented that cement paste from getting back in the steel pipe, therefore guaranteed the cleaning and the sealing effectiveness of screw thread part.Overcome traditional direct circulation masty difficult problem of cementing the well.
4. the present invention has realized double containment, makes sealing more reliable and secure, and conical surface seal is adopted in the sealing of first road, and the middle part of stainless steel plug 2 is tapered; Sealing for the second time: the plug when the second road plug 4 is 3-5 for specification; Structure is: buckle in the cover pipe range garden when screw thread partly is 3-5; Sealing is high, and the second road plug, 4 front ends are provided with guide end 13 and are not easy thread alternating when guaranteeing to detain, the second road plug 4 be shaped as the cylinder hat; The second road plug 4 is socketed in the outside, upper end of plug depression bar 3, and the nut 12 of fixed connection is arranged at the top of the second road plug 4; Through drilling rod the second road plug 4 is sent into and to be rotated in the forward drilling rod in the well and to tighten screw thread, moment of torsion meets API moment of torsion standard-required.The first road seal form is less demanding to the condition of sealing surface, and device has guaranteed the clean of the second road seals at.Because the effect of sealing is for the first time arranged, and cement paste there should be no return in the gas storage steel pipe, therefore guaranteed the cleaning and the sealing effectiveness of screw thread part.
Description of drawings
Accompanying drawing 1 is the axial sectional view of the novel direct circulation cementing unit of well for storage of high pressure gas of the present invention.
Accompanying drawing 2 is the novel direct circulation of well for storage of high pressure gas of the present invention well cementation cementing methods when in this cementing unit, using, the axial sectional view of this cementing unit.
The specific embodiment elaborates to the present invention below in conjunction with accompanying drawing:
See Fig. 1, the direct circulation cementing unit that well for storage of high pressure gas is novel is characterized in that: be made up of bottom (head) 1, stainless steel plug 2, plug depression bar 3, the second road plug 4, casing coupling 5, sealing ring 6, bolt 7; The bottom of bottom (head) 1 porose 11; The bottom cylinder of stainless steel plug 2 is identical with the diameter in hole 11 and put in the hole 11; The cylinder outer ring, bottom of stainless steel plug 2 is equipped with sealing ring 6, and the middle part of stainless steel plug 2 is tapered, and the upper end of stainless steel plug 2 is connected with bolt 7 with the bottom of plug depression bar 3; The inner ring of plug depression bar 3 is a drum, and sealing ring 10 is installed in the epimere outer ring of plug depression bar 3; The second road plug 4 be shaped as the cylinder hat, the second road plug 4 is socketed in that the upper end of plug depression bar 3 is outside, the top of the second road plug 4 is fixedly connected nut 12, the slip joint casing box cupling 5 in the epimere outer ring of bottom (head) 1.
As shown in Figure 1: device is made up of bottom (head) 1, stainless steel plug 2, plug depression bar 3, the second road plug 4, casing coupling 5, sealing ring 6, bolt 7 etc.
See Fig. 2, the direct circulation cementing method that well for storage of high pressure gas is novel is characterized in that: carry out following steps in order
Step 1, brill vertical shaft; The dark 20-300 rice of vertical shaft;
Step 2, in floor-mounted, vertically after the assembling, the plug depression bar 3 of screwing compresses stainless steel plug 2 in the hole 11 of bottom (head) 1 with bottom (head) 1, stainless steel plug 2, plug depression bar 3, box cupling 5; The second road plug 4 is not installed before the well cementation.
Step 3, carry out the hydrostatic test on ground: connect pipeline on ground and carry out the water pressure testing, the assembly of the bottom (head) 1 that assembles, stainless steel plug 2, plug depression bar 3 is carried out the hydrostatic test, to hydraulic pressure be 33Mpa-42Mpa; Voltage stabilizing 10-50 minute; It is qualified detecting leakproof, if hydraulic pressure is defective, explain that bottom (head) 1 and stainless steel plug 2 are off quality or install defective; Change bottom (head) 1 and stainless steel plug 2, carry out the hydrostatic test after reinstalling until qualified;
Step 4, cementing unit is installed in well, with the assembly of the bottom (head) that assembles 1, stainless steel plug 2, plug depression bar 3 along the shaft bottom of falling under the well head; Carry out casing job then: confirm the number of casing coupling 5 and steel pipe casing coupling 5 to be enclosed within on the bottom (head) 1 according to the degree of depth of well, with steel pipe socket on casing coupling 5, mounting sleeve box cupling 5 and steel pipe step by step in order;
Step 5, make a strength test, mainly detect the intensity of sleeve pipe, water pipe is poured water in well from ground, and progressively being forced into hydraulic pressure is 33Mpa-42Mpa; Voltage stabilizing 3-8 hour, it was qualified that hydraulic pressure does not have pressure drop; If defective, then take out sleeve pipe, casing replacing more is in case gas storage well and sleeve pipe scrap, until qualified;
Step 6, carry out the direct circulation well cementing operation, carry out according to the following steps:
A, the connector 8 of will cementing the well are enclosed within on the plug depression bar 3,
When B, well cementation, rotary drill rod is connected drilling rod with well cementation connector 8; Joint face is at screw thread 81 places, and drilling rod down arrives shaft bottom with drilling rod by root with after well cementation connector 8 is connected; It is fastening that drilling rod is connected, and well cementation connector 8 is a sleeve-shaped, and the upper end of well cementation connector 8 is screw thread 81 connector shapes; During well cementation, with Type B pincers every drilling rod is tightened in the going down process, get into the top such as the shown position of plug depression bars 3, be outside equipped with sealing ring 10 in the well cementation connector 8 and be used for the shutoff cement paste and prevent in the cement paste entering sleeve pipe through well cementation connector 8 front ends guiding 82; Drilling rod is that inwall is cylindrical steel pipe.
C, counter-rotating drilling rod withdraw from stainless steel plug 2 in the bottom outlet 11 of bottom (head) 1; (moving back button length is controlled at about 30mm--60mm; Do not thread off to guarantee plug depression bar 3 and bottom (head) 1), connecting the well cementation pump will grout in, along the diagram direction of arrow; Grout in from the top down and be followed successively by: the bull stick inwall--the outside 23 of the hole 11--bottom (head) 1 of inner chamber 22--bottom (head) 1 bottom of the hole 9--bottom (head) 1 on the inner chamber 31--plug depression bar 3 of the inner chamber 83--plug depression bar 3 of well cementation special joint 8; Until injecting gas storage steel pipe outer annular space, fill whole outer annular space, thereby realize the direct circulation well cementation;
After D, well cementation are accomplished, inject clear water and replace out cement paste in the drilling rod, clean drilling rod and bottom (head) bottom outlet 11; The clear water amount is greater than the drilling rod internal volume; After shutting surface water mud pipeline valve, prevent that cement paste from returning in the drilling rod, is rotated in the forward drilling rod; Tighten plug depression bar 3 to compress stainless steel plug 2, realize sealing for the first time; On carry drilling rod and take out drilling rod, take out well cementation connector 8;
Step 7, sealing for the second time: the plug when the second road plug 4 is 3-5 for specification; Become the conical surface seal plug; Its sealing principle is with sealing for the first time, and its structure is that buckle in the cover pipe range garden when screw thread partly is 3-5; Sealing is high, and the second road plug, 4 front ends are provided with guide end 13 and are not easy thread alternating when guaranteeing to detain; Through drilling rod the second road plug 4 is sent in the well, be rotated in the forward drilling rod, tighten screw thread, moment of torsion meets API moment of torsion standard-required; Because the effect of sealing is for the first time arranged, and cement paste there should be no return in the gas storage steel pipe, therefore guaranteed the cleaning and the sealing effectiveness of screw thread part.
Embodiment 1: be pressurised into 36Mpa in the step 3, voltage stabilizing 10 minutes; Being forced into hydraulic pressure in the step 5 is 37Mpa, voltage stabilizing 4 hours.
Embodiment 2: be pressurised into 40Mpa in the step 3, voltage stabilizing 30 minutes; Being forced into hydraulic pressure in the step 5 is 39Mpa, voltage stabilizing 6 hours.

Claims (4)

1. the novel direct circulation cementing unit of well for storage of high pressure gas is characterized in that: be made up of bottom (head) (1), stainless steel plug (2), plug depression bar (3), the second road plug (4), casing coupling (5), sealing ring (6), bolt (7); The bottom of bottom (head) (1) porose (11); The diameter of the bottom cylinder of stainless steel plug (2) and hole (11) is identical and can put in the hole (11); The cylinder outer ring, bottom of stainless steel plug (2) is equipped with sealing ring (6), and the middle part of stainless steel plug (2) is tapered, and the upper end of stainless steel plug (2) is connected with bolt (7) with the bottom of plug depression bar (3); The inner ring of plug depression bar (3) is a drum, and sealing ring (10) is installed in the epimere outer ring of plug depression bar (3); There is screw thread (31) outer ring, stage casing of plug depression bar (3), and there is screw thread (31) in the stage casing of bottom (head) (1) inwall; The second road plug (4) be shaped as the cylinder hat, it is outside that the second road plug (4) is socketed in the upper end of plug depression bar (3), the top of the second road plug (4) is fixedly connected nut (12), at the epimere outer ring of bottom (head) (1) slip joint casing box cupling (5).
2. the direct circulation cementing unit that well for storage of high pressure gas according to claim 1 is novel is characterized in that: the second road plug (4) is the plug of 3-5 inch specification.
3. the direct circulation cementing unit that well for storage of high pressure gas according to claim 1 is novel; It is characterized in that: well cementation connector (8) is sleeve-shaped; The upper end of well cementation connector (8) is the horn mouth shape; Screw thread (81) is arranged on the horn mouth, and well cementation connector (8) is outside equipped with sealing ring (10) in the lower end.
4. the novel direct circulation cementing method of well for storage of high pressure gas is characterized in that: carry out following steps step 1 in order, bore vertical shaft; The dark 20-300 rice of vertical shaft;
Step 2, in floor-mounted, vertically after the assembling, the plug depression bar (3) of screwing compresses stainless steel plug (2) in the hole (11) of bottom (head) (1) with bottom (head) (1), stainless steel plug (2), plug depression bar (3);
Step 3, carry out the hydrostatic test on ground: connect pipeline on ground and carry out the water pressure testing; Assembly to the bottom (head) (1) that assembles, stainless steel plug (2), plug depression bar (3) carries out the hydrostatic test; To hydraulic pressure be 33Mpa-42Mpa, voltage stabilizing 10-50 minute, it was qualified detecting leakproof; If hydraulic pressure is defective; Explain that bottom (head) (1) and stainless steel plug (2) are off quality or it is defective to assemble, change bottom (head) (1) and stainless steel plug (2), carry out the hydrostatic test after ressembling until qualified;
Step 4, cementing unit is installed in well, the assembly of the bottom (head) that assembles (1), stainless steel plug (2), plug depression bar (3) is transferred to the shaft bottom along well head; Play the steel pipe operation then: confirm the number of casing coupling (5) and steel pipe casing coupling (5) to be enclosed within on the bottom (head) (1) according to the degree of depth of well, with steel pipe socket on casing coupling (5), mounting sleeve box cupling (5) and steel pipe step by step in order;
Step 5, make a strength test, mainly detect the intensity of steel pipe, water pipe is poured water in well from ground, and progressively being forced into hydraulic pressure is 33Mpa-42Mpa; Voltage stabilizing 3-8 hour, it was qualified that hydraulic pressure does not have pressure drop; If defective, then take out steel pipe, change steel pipe, in case gas storage well and steel pipe scrap, until qualified;
Step 6, carry out the direct circulation well cementing operation, carry out according to the following steps:
A, the connector (8) of will cementing the well are enclosed within on the plug depression bar (3),
When B, well cementation, rotary drill rod is connected drilling rod with well cementation connector (8); Joint face is located at screw thread (81); Drilling rod is after (8) is connected with the well cementation connector, with drilling rod by root down to the shaft bottom, make the drilling rod connection fastening; Well cementation connector (8) is a sleeve-shaped, and the upper end of well cementation connector (8) is screw thread (a 81) connector shape; During well cementation; With the Type B pincers every drilling rod is tightened in the going down process; Get into the upper position of plug depression bars (3) through well cementation connector (8) front end guiding (82), be outside equipped with sealing ring (10) in well cementation connector (8) lower end and be used for the shutoff cement paste and prevent that cement paste from getting in the steel pipe;
C, counter-rotating drilling rod withdraw from stainless steel plug (2) in the bottom outlet (11) of bottom (head) (1); Move back button length and be controlled at 30mm--60mm; Do not thread off to guarantee plug depression bar (3) and bottom (head) (1); Connecting the well cementation pump will grout in, and grout in from the top down to be followed successively by: the inner chamber (83) of well cementation connector (8), and------inner chamber (22) of bottom (head) (1)--hole (11) of bottom (head) (1) bottom--outside (23) of bottom (head) (1) is until injecting gas storage steel pipe outer annular space for the hole (9) on the plug depression bar (3) for the inner chamber (31) of plug depression bar (3); Fill whole outer annular space, thereby realize the direct circulation well cementation;
After D, well cementation are accomplished, inject clear water and replace out cement paste in the drilling rod, clean drilling rod and bottom (head) bottom outlet (11); The clear water amount is greater than the drilling rod internal volume; After shutting surface water mud pipeline valve, prevent that cement paste from returning in the drilling rod, is rotated in the forward drilling rod; Tighten plug depression bar (3) to compress stainless steel plug (2), realize sealing for the first time; On carry drilling rod and take out drilling rod, take out well cementation connector (8);
Step 7, sealing for the second time: the second road plug (4) is the plug of 3-5 inch for specification; Become the conical surface seal plug; Its sealing principle is with sealing for the first time, and its structure is that screw thread partly is the oval button of sleeve pipe of 3-5 inch; Sealing is high, and second road plug (4) front end is provided with guide end (13) and is not easy thread alternating when guaranteeing to detain; Through drilling rod the second road plug (4) is sent in the well, be rotated in the forward drilling rod, tighten screw thread, moment of torsion meets API moment of torsion standard-required; Because the effect of sealing is for the first time arranged, and cement paste there should be no return in the gas storage steel pipe, therefore guaranteed the cleaning and the sealing effectiveness of screw thread part.
CN2009100588686A 2009-04-08 2009-04-08 Novel direct circulation well cementing device and well cementing method for high-pressure gas underground gas storage well Expired - Fee Related CN101514619B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2009100588686A CN101514619B (en) 2009-04-08 2009-04-08 Novel direct circulation well cementing device and well cementing method for high-pressure gas underground gas storage well

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2009100588686A CN101514619B (en) 2009-04-08 2009-04-08 Novel direct circulation well cementing device and well cementing method for high-pressure gas underground gas storage well

Publications (2)

Publication Number Publication Date
CN101514619A CN101514619A (en) 2009-08-26
CN101514619B true CN101514619B (en) 2012-05-02

Family

ID=41039224

Family Applications (1)

Application Number Title Priority Date Filing Date
CN2009100588686A Expired - Fee Related CN101514619B (en) 2009-04-08 2009-04-08 Novel direct circulation well cementing device and well cementing method for high-pressure gas underground gas storage well

Country Status (1)

Country Link
CN (1) CN101514619B (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102373888A (en) * 2010-08-06 2012-03-14 安东石油技术(集团)有限公司 Sleeve floating coupling and well cementing method
CN114165190A (en) * 2021-12-10 2022-03-11 四川川油天然气科技股份有限公司 Method for ensuring smooth entry of hydrogen storage well casing and continuous and stable operation
CN117189017A (en) * 2023-11-07 2023-12-08 江苏金石机械集团有限公司 Sealing plug suite suitable for wellhead device and Christmas tree pipeline taper threads

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5333465A (en) * 1992-04-30 1994-08-02 Mcbride Terry R Underground storage system for natural gas
CN1384308A (en) * 2001-05-08 2002-12-11 自贡市华气科技开发有限公司 Well shaft fixing method for underground gas-storing well
CN1837672A (en) * 2006-04-07 2006-09-27 冉训 A fixation method for underground gas storage well bore
CN1952466A (en) * 2005-10-11 2007-04-25 冉训 Underground gas storage well shaft and its fixing method
CN200940768Y (en) * 2005-11-04 2007-08-29 仲文旭 Double pipe underground natural gas high pressure gas storage well

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5333465A (en) * 1992-04-30 1994-08-02 Mcbride Terry R Underground storage system for natural gas
CN1384308A (en) * 2001-05-08 2002-12-11 自贡市华气科技开发有限公司 Well shaft fixing method for underground gas-storing well
CN1952466A (en) * 2005-10-11 2007-04-25 冉训 Underground gas storage well shaft and its fixing method
CN200940768Y (en) * 2005-11-04 2007-08-29 仲文旭 Double pipe underground natural gas high pressure gas storage well
CN1837672A (en) * 2006-04-07 2006-09-27 冉训 A fixation method for underground gas storage well bore

Also Published As

Publication number Publication date
CN101514619A (en) 2009-08-26

Similar Documents

Publication Publication Date Title
CN102561992B (en) Grouting plugging process adopting deformation water stopper
CN102071961B (en) Downward gas drainage drill hole and pressure testing drill hole sealing method
CN109723404A (en) Coal measure gas prospect pit naked eye device for plugging and method
CN105804735A (en) Three-plunger type hydraulic fracturing ground stress measurement system
CN101514619B (en) Novel direct circulation well cementing device and well cementing method for high-pressure gas underground gas storage well
CN203847063U (en) Gradual-cracking bridge plug in horizontal well pipe
CN104948133B (en) The slip casting plugging device and its technique of a kind of suitable high-pressure high-flow drilling water burst
CN105241750B (en) Pressurized head systems for indoor three axle hydraulic fracturings experiment
CN201428415Y (en) Quick pressure testing device of well mouth blowout preventer
CN206204974U (en) A kind of device for plugging for concrete pipe base core-drawing hole water burst
CN202946094U (en) Double-power-source packer for air-tight seal detection of oil sleeve
CN114427438B (en) Multifunctional pressure testing device for shaft
CN201436369U (en) Positive circulation well reinforcement divice of a high pressure gas underground gas storage well
CN2849421Y (en) Detachable underground high-pressure gas storage device for wellhead
CN205103092U (en) A pressure head system for indoor triaxial hydraulic fracturing is experimental
CN209510288U (en) A kind of underground coal mine water guide borehole sealing device
CN209129575U (en) Water-swellable water injection packer
CN203672703U (en) Test device of hole reinforcement materials of grouting hole of broken roof of coal mine
CN203756067U (en) High-pressure test connector for expansion pipe
CN209556980U (en) Coal measure gas prospect pit naked eye device for plugging
CN202546236U (en) Multi-layer gas storage well barrel for high-pressure underground gas storage well
CN202546243U (en) Multilayer gas storage well barrel used for high-pressure underground gas storage well
CN203594400U (en) Blowout-prevention device for continuous pipe type cable test
CN205483607U (en) Caisson type is separator hyperbaric chamber test device under water
CN106837236A (en) A kind of self-service pressurized expansion packer

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
C14 Grant of patent or utility model
GR01 Patent grant
C56 Change in the name or address of the patentee

Owner name: ZIGONG GAS TECHNOLOGY CO., LTD.

Free format text: FORMER NAME: HUAQI SCIENCE +. TECHNOLOGY DEVELOPMENT CO., LTD., ZIGONG

CP03 Change of name, title or address

Address after: 643000, No. 8, industrial road, Sichuan Industrial Zone, Zigong high tech Zone

Patentee after: ZIGONG HUAQI TECHNOLOGY Co.,Ltd.

Address before: 643000 Zigong city of Sichuan Province, Ziliujing District Itakura Industrial Park C3-01B

Patentee before: Zigong Gas Technology Development Co.,Ltd.

CF01 Termination of patent right due to non-payment of annual fee
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20120502