CN201436369U - Positive circulation well reinforcement divice of a high pressure gas underground gas storage well - Google Patents
Positive circulation well reinforcement divice of a high pressure gas underground gas storage well Download PDFInfo
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- CN201436369U CN201436369U CN2008202233932U CN200820223393U CN201436369U CN 201436369 U CN201436369 U CN 201436369U CN 2008202233932 U CN2008202233932 U CN 2008202233932U CN 200820223393 U CN200820223393 U CN 200820223393U CN 201436369 U CN201436369 U CN 201436369U
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Abstract
A positive circulation well reinforcement divice of a high pressure gas underground gas storage well is characterized in that a hole 11 is arranged at the bottom of a bottom gland 1, a bottom cylinder of a stainless steel plug 2 has the same diameter with the hole 11 and extends into the hole 11, the middle portion of the stainless steel plug 2 is conical, the upper end of the stainless stelel plug 2 ia connected with the bottom of a plug press lever 3 through a bolt 7, the inner ring of the plug press lever 3 is cylindrical; a second plug 4 is provided with a cylindrival cap shape, and is sleeved outside the upper end of the plug press lever 3, the upper portion of the second plug 4 is a connection nut 12, an upper segment outer ring of the bottom gland 1 is sleeved with a sleeve hoop 5, and the second plug 4 is a plug of 3-5 inches. The utility model is provided with double-sealing to enable the sealing safer and more raliable, the first sealing is a conical surface sealing, and the second sealing is sealing by using a 3-5 inches sleeve buckle. The first sealing has low requirement for sealing sureface condition, and cleaness at the second sealing protion is ensured.
Description
Technical field
The utility model relates to high-pressure gas storage well and carries out a kind of direct circulation cementing unit 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 is swift and violent in whole nation development since 2002 include the national standard standard in, 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 substantially.
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 well shaft fixing technology 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 well shaft fixing technology:
1. utilize soft plain boiled water band to realize that from the outer annular space of sleeve pipe there is following shortcoming in the well cementation of this kind of well cementation:
1. in the setting of casing process because operator's carelessness and error cause the damage to the plain boiled water band easily.
2. this kind well shaft fixing technology 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 well shaft fixing technology.
But owing to will and realize shutoff in the bottom (head) perforate, difficulty of design and construction is all very big, and all there is deficiency in therefore at present existing several direct circulation well cementation modes:
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, mostly be with plug and realize shutoff bottom (head), owing to the degree of depth reason of well, on detain difficulty and cause cross threading more easily, and the influence sealing is easily leaked.
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 purpose of this utility model 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 present several cementing units, except realizing that the utility model cementing quality well, the sealing height 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.
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, 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, 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 the outside, upper end of plug depression bar 3, the fixedly connected nut 12 in the top of the second road plug 4 is at the epimere outer ring of bottom (head) 1 slip joint casing box cupling 5.
Comparing the beneficial effects of the utility model with original technology is:
1. be different from by traditional direct circulation cementing unit and lean on all sealings of back pressure, the utility model 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 utility model 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 utility model 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 utility model has been realized double containment, makes sealing more reliable and secure, and conical surface seal is adopted in the sealing of first road, and the plug sealing of 3-5 inch is adopted in the sealing of second road.The first road seal form is less demanding to the condition of sealing surface, and device has guaranteed that the cleaning of second road sealing place is clean.
Description of drawings
Accompanying drawing 1 is an axial sectional view of the present utility model.
Accompanying drawing 2 is well shaft fixing technology structure charts of the present utility model.
The specific embodiment
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, 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, 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 the outside, upper end of plug depression bar 3, the fixedly connected nut 12 in the top of the second road plug 4 is at the epimere outer ring of bottom (head) 1 slip joint casing box cupling 5.
The direct circulation cementing unit that described well for storage of high pressure gas is novel is characterized in that: the second road plug 4 is the plug of 3-5 inch specification.
See Fig. 2, 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.
Below in conjunction with accompanying drawing principle of the present utility model is elaborated:
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.The second road plug 4 is not installed before the well cementation, screw the hole 11 that plug depression bar 3 compresses stainless steel plug 2 bottom (head) 1 earlier, carry out the hydrostatic test on the ground earlier by after connecting, get rid of, can carry out casing job after bottom (head) 1 is qualified as the defective factor relevant of back casing pressure test with bottom (head).Stainless steel plug 2 can also guarantee except playing seal of vessel that in the setting of casing process mud does not enter in the steel pipe in the well, more reliable than common back pressure valve sealing, after steel pipe has descended, promptly carry out the intensity pressure testing, avoid the defective and heavy losses that cause gas storage steel pipe and well location to scrap of well cementation back pressure testing earlier.Enter the direct circulation well cementing operation after the intensity pressure testing is qualified.
As shown in Figure 2: well cementation connector 8 is a sleeve-shaped, and the upper end of well cementation connector 8 is the screwed connection head shapes; During well cementation, drilling rod with after well cementation connector 8 is connected with drilling rod by root down to the shaft bottom, clamp with Type B in the going down process every drilling rod tightened.Enter shown position by well cementation connector 8 front ends guiding, be outside equipped with sealing ring 10 in the well cementation connector 8 and be used for the shutoff cement paste and prevent that cement paste from entering in the sleeve pipe.The drilling rod that reverses then withdraws from stainless steel plug 2 in the bottom outlet 11 of bottom (head) 1, move back button length and be controlled at and be fit to length and do not thread off, cement paste is injected the outer annular space of gas storage steel pipe along the diagram direction of arrow realize that direct circulation cements the well thereby connect the well cementation pump to guarantee plug depression bar 3 and bottom (head) 1.After well cementation is finished, 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, be rotated in the forward drilling rod and tighten plug depression bar 3 to compress stainless steel plug 2 realizations sealing for the first time.On carry drilling rod and take out drilling rod.Take out well cementation connector 8.
Sealing for the second time: the second road plug 4 is the plug of 3-5 inch for specification, and structure is: screw thread is partly buckled for the cover pipe range garden of 3-5 inch, and sealing height, the second road plug, 4 front ends are provided with guide end 13 and are not easy thread alternating when guaranteeing to detain.By 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.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.
Claims (3)
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 put in the hole (11), 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), 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 the outside, upper end of plug depression bar (3), the fixedly connected nut in top (12) of the second road plug (4) is 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, it is characterized in that: the second road plug (4) is the plug of 3-5 inch for specification, structure is: screw thread partly is the oval button of sleeve pipe of 3-5 inch, and second road plug (4) front end is provided with guide end (13).
3. the direct circulation cementing unit that well for storage of high pressure gas according to claim 1 and 2 is novel is characterized in that: well cementation connector (8) is a sleeve-shaped, and the upper end of well cementation connector (8) is the horn mouth shape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008202233932U CN201436369U (en) | 2008-12-15 | 2008-12-15 | Positive circulation well reinforcement divice of a high pressure gas underground gas storage well |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008202233932U CN201436369U (en) | 2008-12-15 | 2008-12-15 | Positive circulation well reinforcement divice of a high pressure gas underground gas storage well |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201436369U true CN201436369U (en) | 2010-04-07 |
Family
ID=42372823
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2008202233932U Expired - Lifetime CN201436369U (en) | 2008-12-15 | 2008-12-15 | Positive circulation well reinforcement divice of a high pressure gas underground gas storage well |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201436369U (en) |
-
2008
- 2008-12-15 CN CN2008202233932U patent/CN201436369U/en not_active Expired - Lifetime
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 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: Huaqi Science &. Technology Development Co., Ltd., Zigong |
|
| CX01 | Expiry of patent term |
Granted publication date: 20100407 |
|
| CX01 | Expiry of patent term |