CN2769491Y - Viscous oil thermal recovery well jacket pipe connecting structure - Google Patents
Viscous oil thermal recovery well jacket pipe connecting structure Download PDFInfo
- Publication number
- CN2769491Y CN2769491Y CN 200420098832 CN200420098832U CN2769491Y CN 2769491 Y CN2769491 Y CN 2769491Y CN 200420098832 CN200420098832 CN 200420098832 CN 200420098832 U CN200420098832 U CN 200420098832U CN 2769491 Y CN2769491 Y CN 2769491Y
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- CN
- China
- Prior art keywords
- casing
- circular arc
- sleeve pipe
- coupling
- reducer
- Prior art date
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- Expired - Fee Related
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Abstract
The utility model relates to a viscous oil thermal recovery well sleeve pipe connecting structure comprising a sleeve pipe, a threaded joint and a sleeve pipe coupling; the utility model is characterized in that the connecting threads of the sleeve pipe and the sleeve pipe coupling are trapezoidal taper pipe threads of 6*65 DEG, and the taper is 1: 16; the end of a sleeve pipe joint is provided with a reducer which is provided with an inward circular arc, the taper of the reducer is 1: 8, and the end of the reducer is provided with an outward circular arc; a conical groove is arranged below a relief groove of the sleeve pipe coupling, the diameter of the conical groove is smaller than the diameter of the relief groove, and the taper of the conical groove is 1: 8; the reducers of the two grooves are provided with an outward circular arc, and the bottom part of the taper groove is provided with the inward circular arc; the sleeve pipe joint is connected to the sleeve pipe coupling, and the inward circular arc of the reducer of the sleeve pipe joint is pressed on the outward circular arc which is arranged on the outward circular arcs of the reducers of the relief groove of the sleeve pipe coupling and the conical groove below the relief groove; the outward circular arc of the end of the reducer of the sleeve pipe joint is pressed on the inward circular arc of the bottom of the conical groove of the sleeve pipe coupling. Therefore, two linear sealings of the connection of the sleeve pipe and the sleeve pipe coupling are formed.
Description
One, technical field
The utility model relates to a kind of thick oil thermal extraction casing-pipe connection structure.
Two, background technology
Solid thermal stress at thermal production well is big in the world, make the casing buckling distortion, loosening, leakage, seriously corroded are threaded, cause tubing string to damage problem and carried out extensive work, for example: Canadian C-FER company carried out further investigation to the casing failure in thermal recovery problem of this state, proposed some solutions, mainly contained and use special thread, adopt instlated tubular, adopt thermal stress releasing tool etc.Adopt instlated tubular or thermal stress releasing tool to reduce the thermal stress of casing string, cost is too high.In conjunction with national conditions, take into full account economy, what present stage adopted is earth anchor special cementing method.This has certain effect to solving the thermal production well problem, but the method also exists defective, is badly in need of a kind of special-purpose special thread sleeve pipe that is more suitable in thermal production well of exploitation.There are tame famous oil well pipe manufacturer more than 30 and scientific research institution to develop nearly more than 100 kinds of nipples at present both at home and abroad,, have only three kinds of special thread joints of NSCC, TM-SW and TC-2 can satisfy the thermal production well condition through the evaluation of Xi'an tubing research institute.But, indiscriminately imitate external experience or buy state's outer tube and solve the thermal production well tubing string and damage problem, and do not consider that cost is unpractical, and its screw thread right and wrong API standard, need production firm specialize in special measurer and detect, the thermal production well overhaul management is restricted.
Three, summary of the invention
The purpose of this utility model provides a kind of thick oil thermal extraction casing-pipe connection structure, solves the cover pipe thread because of the big effect of thermal stress, makes it loosening and disconnects poorly sealed leakage problem.
The technical solution of the utility model realizes in the following manner:
The utility model is by sleeve pipe, nipple and casing coupling are formed, it is characterized in that sleeve pipe and casing coupling connecting thread are 6 * 65 ° of ladder type taper pipe threads, its tapering is 1: 16, be provided with a reducer in the end of casing joint, the reducing place is made as inside circular arc, the tapering of reducer is 1: 8, its end is made as outside circular arc, being provided with a tapering less than the escape diameter in casing coupling escape bottom is 1: 8 cone tank, be made as outside circular arc at two groove reducing places, be provided with an inside circular arc in the cone tank bottom, casing joint is connected with the cover pipe collar, the inside circular arc in casing joint reducing place is pressed on the outside circular arc in casing coupling escape and its inferior pyramidal groove reducing place, the outside circular arc in reducer end of casing joint end is pressed on the inside circular arc in casing coupling cone tank bottom, the twice line style sealing that forming sleeves is connected with casing coupling.
On casing threads ending line, be provided with a little triangle that makes progress, sleeve pipe and casing coupling Connection Termination Point, casing coupling end face line aligns with the base of little triangle.
Casing threads is carried out nitriding handle or spray alloy treatment.
Compared with the prior art the utility model has the following advantages:
1, adopts the non-standard syndeton form of optimizing structure, improved yield strength and permitted stress intensity.
2, adopt the two seals toe-in to close form, improved tightness, the corrosion that has prevented leakage or caused because of leakage.
3, casing threads is carried out specially treated, prevented that sleeve pipe from using the thread abrasion that causes repeatedly, improve the application life of sleeve pipe.
Four, description of drawings
Fig. 1-connection diagram of the present utility model;
Fig. 2-casing joint structural representation;
I portion partial enlarged drawing among Fig. 3-Fig. 2;
Fig. 4-casing coupling structural representation;
B portion partial enlarged drawing among Fig. 5-Fig. 4.
Five, the specific embodiment
Be further openly the technical solution of the utility model, be described in detail by embodiment below in conjunction with Figure of description 1,2,3,4,5:
The utility model is made up of sleeve pipe 1 and casing coupling 2 as shown in Figure 1.6 * 65 ° of ladder type taper pipe threads of sleeve pipe and casing coupling connecting thread shown in Fig. 2,4, its tapering 1: 16.Be provided with a reducer as Fig. 2,3 ends that are shown in casing joint, the reducing place is made as inside circular arc, and the reducer tapering is 1: 8, and its end is made as outside circular arc.Shown in Fig. 4,5, being provided with a tapering less than the escape diameter in casing coupling escape bottom is 1: 8 cone tank, is made as outside circular arc at two groove reducing places, is provided with an inside circular arc in the cone tank bottom.When sleeve pipe is connected with casing coupling, the inside circular arc in casing joint reducing place is pressed on the outside circular arc in casing coupling escape and its inferior pyramidal groove reducing place, the outside circular arc in reducer end of casing joint end is pressed on the inside circular arc in casing coupling cone tank bottom, the corresponding coupling of each circular arc cooperates, the twice line style sealing that forming sleeves is connected with casing coupling has improved tightness.
Claims (3)
1, a kind of thick oil thermal extraction casing-pipe connection structure, by sleeve pipe, nipple and casing coupling are formed, it is characterized in that sleeve pipe and casing coupling connecting thread are 6 * 65 ° of ladder type taper pipe threads, its tapering is 1: 16, be provided with a reducer in the end of casing joint, the reducing place is made as inside circular arc, the tapering of reducer is 1: 8, its end is made as outside circular arc, being provided with a tapering less than the escape diameter in casing coupling escape bottom is 1: 8 cone tank, be made as outside circular arc at two groove reducing places, be provided with an inside circular arc in the cone tank bottom, casing joint is connected with the cover pipe collar, the inside circular arc in casing joint reducing place is pressed on the outside circular arc in casing coupling escape and its inferior pyramidal groove reducing place, the outside circular arc in reducer end of casing joint end is pressed on the inside circular arc in casing coupling cone tank bottom, the twice line style sealing that forming sleeves is connected with casing coupling.
2, thick oil thermal extraction casing-pipe connection structure according to claim 1 is characterized in that being provided with a little triangle that makes progress on casing threads ending line, sleeve pipe and casing coupling Connection Termination Point, and casing coupling end face line aligns with the base of little triangle.
3, thick oil thermal extraction casing-pipe connection structure according to claim 1 is characterized in that casing threads is carried out nitriding handles or spray alloy treatment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420098832 CN2769491Y (en) | 2004-11-11 | 2004-11-11 | Viscous oil thermal recovery well jacket pipe connecting structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420098832 CN2769491Y (en) | 2004-11-11 | 2004-11-11 | Viscous oil thermal recovery well jacket pipe connecting structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2769491Y true CN2769491Y (en) | 2006-04-05 |
Family
ID=36690572
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200420098832 Expired - Fee Related CN2769491Y (en) | 2004-11-11 | 2004-11-11 | Viscous oil thermal recovery well jacket pipe connecting structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2769491Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102121355A (en) * | 2010-12-31 | 2011-07-13 | 江苏常宝钢管股份有限公司 | Heat-insulating oil tube connecting structure of which user end of pipe-end inner pipe is welded fixedly |
| CN103670372A (en) * | 2013-12-20 | 2014-03-26 | 中国石油天然气集团公司 | System and method for judging strain of casing string of thermal production well |
-
2004
- 2004-11-11 CN CN 200420098832 patent/CN2769491Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102121355A (en) * | 2010-12-31 | 2011-07-13 | 江苏常宝钢管股份有限公司 | Heat-insulating oil tube connecting structure of which user end of pipe-end inner pipe is welded fixedly |
| CN102121355B (en) * | 2010-12-31 | 2015-09-30 | 江苏常宝钢管股份有限公司 | The heat-insulating oil pipe connection structure that in pipe end, pipe user side is welded and fixed |
| CN103670372A (en) * | 2013-12-20 | 2014-03-26 | 中国石油天然气集团公司 | System and method for judging strain of casing string of thermal production well |
| CN103670372B (en) * | 2013-12-20 | 2016-05-11 | 中国石油天然气集团公司 | A kind of Casing In Thermal Recovery Wells strain judges system and method thereof |
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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 |