CN2244093Y - Wellhead plugging device for natural gas well - Google Patents
Wellhead plugging device for natural gas well Download PDFInfo
- Publication number
- CN2244093Y CN2244093Y CN 95212931 CN95212931U CN2244093Y CN 2244093 Y CN2244093 Y CN 2244093Y CN 95212931 CN95212931 CN 95212931 CN 95212931 U CN95212931 U CN 95212931U CN 2244093 Y CN2244093 Y CN 2244093Y
- Authority
- CN
- China
- Prior art keywords
- hough
- pressurization
- natural gas
- injecting glue
- screw 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
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Abstract
The utility model relates to a wellhead plugging device for natural gas wells used for prospection and development of natural gas, comprising a compound lining half 3, a pressurizing screw 4, a pressurizing half 5, etc., wherein, a duplex short piece 2 is arranged in the compound lining half 3, and the pressurizing screw 4 is connected with the lower part of the compound lining half 3. The utility model has the advantages of simple and easy plugging process, short construction period, high-pressure resistance, high adhesive force and shearing strength, erosion resistance of hydrogen sulfide gas, long term good sealing effect and dispense with replacement of wellhead assemblies, and construction operation can be carried out under conditions of high pressure and no killing well.
Description
The utility model relates to natural gas exploration and the reparation of exploitation gas well mouth casing head place's gas leakage and the leak stopping of gas gathering pipeline.
At present, domestic natural gas well well head casing head is owing to the problem of thread seal quality, and As time goes on gas leak phenomenon increases, and after existing restorative procedure will adopt injection liquid to carry out kill job, changes flange and two public pipe nipples of well head air-leak section.Empirical evidence kill-job meeting is polluted gas-bearing formation and is reduced 30～50% of gas well output, even can kill gas-bearing formation and cause heavy economic losses, and construction link is many, and the cycle is long, and the cost height has had a strong impact on the exploitation of gas well.
The purpose of this utility model provides and does not a kind ofly need to inject liquid and carry out kill-job, need not change the well head CHF, and under high pressure (40MPa is following) does not need open flow can carry out the novel gas well mouth device for plugging of casing head leak stopping.
The utility model according to the gas well casing head at the bottom of flange and two public pipe nipple screw thread places this fact of leaking gas, a cover device for plugging is provided.It comprises injecting glue Hough and pressurization Hough, and they can be stuck on the sleeve outer wall by the bolt connection.Injecting glue Hough upper surface is regulated by the pressurization screw rod of pressurization Hough and is withstood on end flange lower end.After joint ring section on injecting glue Hough upper surface and axial bore end face and this both ends of the surface bonds with adhesive glue, with the seal ring seat of the joint ring of axial bore end and upper end surface in the groove of these both ends of the surface.The glue groove is held in injecting glue Hough endoporus and the design of the place of joining, upper surface, in adhesive glue Hou Ning process, holds the interior high-pressure natural gas of glue groove by hole for injecting glue emptying.Colloid-injecting gun can be injected into this with glue from the hole for injecting glue of injecting glue Hough cylindrical end and hold the glue groove, forms three grades of sealings, to block well head gas leakage.
Advantage of the present utility model is traditional gas well mouth renovation technique has been done the improvement of two aspects: the one, adopt snubbing serving technology, and the 2nd, need not change wellhead assembly.The utlity model has simple in structure, easy to operate, reasonable in design, construction safety, reliable, and leak-stopping technique is simple and easy to do, short construction period, high pressure resistant, the highest withstand voltage 40Pa, glue bond power and shear strength height, and corrosion-resistant, the anti-H 2 S gas pickling, long term seal is effective.Construction operation under the novel condition of not kill-job under high pressure of this reality is not changed wellhead assembly.Can reduce operating expenses, not pollute gas-bearing formation.In a word, the utility model is a new technology of natural gas well head leak stopping.
Below in conjunction with accompanying drawing, specifically introduce the utility model.
Fig. 1 is a structure installation drawing of the present utility model.
Fig. 2 is an injecting glue half slide structure schematic diagram of the present utility model.
Fig. 3 is the utility model pressurization half slide structure schematic diagram.
Fig. 4 is Fig. 3 Hough A-A partial sectional view that pressurizes.
Fig. 5 is that Fig. 3 pressurizes Hough A to partial view.
Referring to Fig. 1: 1 is end flange, and 2 is two public pipe nipples, and 3 is the injecting glue Hough, 4 are the pressurization screw rod, 5 are the pressurization Hough, and 6 is upper branching holder, and 7 is casing coupling, 8 is supporting base, 9 is production casing, and 10 are the taper slips, and 11 is slip spider, 12 is the lower support seat, 13 is doughnut-shaped steel plate, and 14 is surface pipe, injecting glue Hough 3 below end flange 1, two public pipe nipples 2 place in the injecting glue Hough 3, pressurization screw rod 4 connects with injecting glue Hough 3 bottoms, and pressurization Hough 5 connects with upper branching holder 6, and casing coupling 7 is arranged in upper branching holder 6, casing coupling 7 is enclosed within on the production casing 9, taper slips 10 connect with production casing 9 and the seat on slip spider 11, supporting base 8 bottoms connect with slip spider 11, lower support seat 12 places below the slip spider 11, and connect with doughnut-shaped steel plate 13, surface pipe 14 connects with doughnut-shaped steel plate 13.
Referring to Fig. 2: the injecting glue Hough is made up of two semi-rings 15 and 16, connects to be stuck on two public pipe nipples 2 by bolt 17 and forms an integral body.All there is a hole 18 in the two semi-rings outside, can be connected control tolerance, and the pressure meter of dress 60MPa by screw thread with outlet valve.
Referring to Fig. 3: the pressurization Hough by two semi-rings 19 be stuck on pair public pipe nipples 2 after 20 are connected by bolt 21, base part seat is on upper branching holder 6.Pressurization screw rod 22 is 6-6 and distributes symmetrically, and a groove is arranged on the screw rod, plays position-limiting action by pin 23.
The novel S-69 well (well head pressure 25MPa) in gas field, Changqing Petroleum Exploration Bureau northern Shensi of this reality has carried out operation, and has been crowned with complete success.
Claims (3)
1. natural gas gas well mouth device for plugging, it comprises end flange (1), two public pipe nipples (2) injecting glue Houghs (3), pressurization screw rod (4), pressurization Hough (5), upper branching holder (6), casing coupling (7), supporting base (8), production casing (9), taper slips (10), slip spider (11), lower support seat (12), doughnut-shaped steel plate (3), two public pipe nipples (2) place in the injecting glue Hough (3), pressurization screw rod (4) connects with injecting glue Hough (3) bottom, pressurization Hough (5) connects with upper branching holder (6), casing coupling (7) is arranged in upper branching holder (6), casing coupling (7) is enclosed within on the production casing (9), taper slips (10) connect with production casing (9) and the seat on slip spider (11), supporting base (8) bottom connects with slip spider (11), lower support seat (12) places below the slip spider (11), and connect with doughnut-shaped steel plate (13), surface pipe (14) connects with doughnut-shaped steel plate (13).
2. natural gas well well head device for plugging according to claim 1, it is characterized in that: the injecting glue Hough is made up of two semi-rings (15) and (16), be stuck in two public pipe nipples (2) by bolt (17) connection and go up composition one integral body, all there is a hole (18) in the two semi-rings outside, can be connected with outlet valve by screw thread.
3. natural gas well well head device for plugging according to claim 1 is characterized in that: the pressurization Hough is stuck on pair public pipe nipples (2) by two semi-rings (19) with after (20) are connected by bolt (21), and base part seat is on upper branching holder (6).Pressurization screw rod (22) is 6-6 and distributes symmetrically, and a groove is arranged on the screw rod, plays position-limiting action by pin (23).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 95212931 CN2244093Y (en) | 1995-06-13 | 1995-06-13 | Wellhead plugging device for natural gas well |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 95212931 CN2244093Y (en) | 1995-06-13 | 1995-06-13 | Wellhead plugging device for natural gas well |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2244093Y true CN2244093Y (en) | 1997-01-01 |
Family
ID=33862964
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 95212931 Expired - Fee Related CN2244093Y (en) | 1995-06-13 | 1995-06-13 | Wellhead plugging device for natural gas well |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2244093Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108716377A (en) * | 2018-08-15 | 2018-10-30 | 杨福苗 | A kind of gas well device for plugging and gas well drilling equipment |
| CN111021978A (en) * | 2018-03-12 | 2020-04-17 | 丁睿哲 | Petroleum industry well head prosthetic devices |
-
1995
- 1995-06-13 CN CN 95212931 patent/CN2244093Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111021978A (en) * | 2018-03-12 | 2020-04-17 | 丁睿哲 | Petroleum industry well head prosthetic devices |
| CN111021978B (en) * | 2018-03-12 | 2021-11-23 | 盐城瑞德石化机械有限公司 | Petroleum industry well head prosthetic devices |
| CN108716377A (en) * | 2018-08-15 | 2018-10-30 | 杨福苗 | A kind of gas well device for plugging and gas well drilling equipment |
| CN108716377B (en) * | 2018-08-15 | 2024-04-16 | 杨福苗 | Gas well plugging device and gas well drilling equipment |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |