CN202325279U - Direct-connected heat-insulated oil tube for thermal recovery wells - Google Patents
Direct-connected heat-insulated oil tube for thermal recovery wells Download PDFInfo
- Publication number
- CN202325279U CN202325279U CN2011204590071U CN201120459007U CN202325279U CN 202325279 U CN202325279 U CN 202325279U CN 2011204590071 U CN2011204590071 U CN 2011204590071U CN 201120459007 U CN201120459007 U CN 201120459007U CN 202325279 U CN202325279 U CN 202325279U
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- torque shoulder
- thread
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- internal
- shoulder
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- 238000011084 recovery Methods 0.000 title abstract description 4
- 238000004519 manufacturing process Methods 0.000 claims description 18
- 238000007906 compression Methods 0.000 abstract description 5
- 230000006835 compression Effects 0.000 abstract description 3
- 238000010793 Steam injection (oil industry) Methods 0.000 abstract description 2
- 239000002184 metal Substances 0.000 abstract description 2
- 239000003921 oil Substances 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
- 238000009413 insulation Methods 0.000 description 3
- 238000003754 machining Methods 0.000 description 3
- 239000011324 bead Substances 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000000605 extraction Methods 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 238000010794 Cyclic Steam Stimulation Methods 0.000 description 1
- 238000010796 Steam-assisted gravity drainage Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000295 fuel oil Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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Abstract
The utility model discloses a direct-connected heat-insulated oil tube for thermal recovery wells, which is suitable to be applied to steam-injection thermal recovery wells. Through the connection of an internal thread and an external thread processed on an inner tube, stress distributed on the joint of the internal thread and the external thread is more uniform, so that the oil tube can bear greater thermal compression loads. The oil tube disclosed by the utility model comprises an outer tube and inner tubes, wherein the outer tube is welded on the outside of the inner tubes, threads are processed on each inner tube, one end of each inner tube is an external thread end A, and the other end of each inner tube is an internal thread end N, the external thread ends A and the internal thread ends N of the two inner tubes are connected, each external thread end A is sequentially provided with an external buckled-end external-upset B, an external assistant torque shoulder C, an external cylindrical section D, an external thread E, an external conical surface F and an external main torque shoulder G; and the internal thread end N is sequentially provided with an internal assistant torque shoulder H, an internal cylindrical section I, an internal thread J, an internal conical surface K, an internal main torque shoulder L and an internal buckled-end external-upset M, and the external thread ends A and the internal thread end Ns form a metal interference fit, thereby improving the anti-compression capacity of the joint of the heat-insulated oil tube.
Description
Technical field
The utility model relates to petroleum industry thermal production well vacuum heat-insulation oil pipe; Particularly a kind of thermal production well direct linkage type insulated tubing is applicable to the heat extraction by steam injection well, is connected with external screw thread through processing internal thread on inner pipe; The stress distribution of junction is more even, can bear bigger hot compression load.
Background technology
China's heavy oil resource distribution is extensive, and viscous crude occupies suitable proportion in China's oil output, and each oil-field thick-oil output also improves year by year.Viscous crude mainly with the method exploitation of heating exploitation, can be divided into cyclic steam stimulation, steam driving exploitation and SAGD.Receive temperatures involved, the cover damage phenomenon of thermal production well is very serious.Adopted vacuum heat-insulation oil pipe afterwards, cover damage problem obtains solution to a certain degree, and insulated tubing is used in most domestic heavy crude heat extraction oil field at present.Insulated tubing is made up of inside and outside two-layer pipe; Outer tube is connected with interior pipe through welding; Be filled with insulated gas between the inner and outer pipes, guarantee that the heat of vapours is difficult for scattering and disappearing, traditional insulated tubing is processed the coupling type screw thread on outer tube; Through box cupling insulated tubing is connected, box cupling has taken bigger external diameter in the insulated tubing tubing string of thermal production well.The effect of heat insulation of in use finding joint is undesirable, and along with the appearance of horizontal well thermal recovery, all there are certain problem in the bonding strength of joint, incompressible intensity and steam seal etc., even failure accidents takes place.Because existing insulated tubing adopts box cupling to connect, and the external diameter of box cupling is greater than the external diameter of body, and therefore, for the conditional hole condition of insulated tubing tubing string external diameter, this kind insulated tubing is inapplicable.Recently the research that yet has machining screw on inner pipe to connect is not suitable for thermal production well but be to use regular screw threads to connect.
Summary of the invention
The purpose of the utility model provides a kind of thermal production well direct linkage type insulated tubing, improves the structure of screw thread and junction, improves bonding strength and anti-compression properties, makes it adapt to the hole condition of thermal production well more.
The technical solution of the utility model is: a kind of thermal production well direct linkage type insulated tubing comprises outer tube and interior pipe; The outside of pipe in outer tube is welded on; Screw thread is processed on inner pipe, and interior Guan Yiduan is male end A, and the other end is female end N; The male end A of pipe is connected with female end N in two, is provided with outer end of thread external upset (EU) B, outer accessory torque shoulder C, cylindrical shell of column D, external screw thread E, outer conical surface F and outer main torque shoulder G on the male end A successively; Accessory torque shoulder H, interior cylindrical section I, internal thread J, internal conical surface K in being provided with successively on the female end N, in main torque shoulder L and interior end of thread external upset (EU) M, male end A and female end N formation metal interference fit.
Compared with prior art the beneficial effect of the utility model is: the interior pipe junction of the utility model have the two shoulders of direct linkage type, external upset (EU), major and minor moment of torsion, conical surface seal, screw thread be processed in pipe go up isostructural advantage.After pipe connects in two; Internal thread and external screw thread engagement; Main torque shoulder cooperates on outer main torque shoulder on the male end and the female end; Outer accessory torque shoulder cooperates with interior accessory torque shoulder, and major and minor torque shoulder is born compressive load jointly, has improved the resistance to compression of insulated tubing junction.All design the external upset (EU) structure in female end and male end, increased the bonding strength of junction.Machining screw has changed traditional insulated tubing is processed the coupling type screw thread on outer tube type of attachment on inner pipe, has increased the outside dimension of insulated tubing tubing string, has enlarged the scope of application, has made things convenient for the construction of thermal production well down-stream.Change the production technology of insulated tubing, improved working (machining) efficiency, practiced thrift processing cost.
Description of drawings
Fig. 1 is the structural representation of the utility model junction.
Fig. 2 is the structural representation of the utility model female end.
Fig. 3 is the structural representation of the utility model male end.
Fig. 4 is the structure enlarged diagram of main torque shoulder in the utility model female end.
Fig. 5 is the structure enlarged diagram of the outer main torque shoulder of the utility model male end.
Fig. 6 is the enlarged diagram of the utility model buttress thread.
Fig. 7 is the structural representation of accessory torque shoulder in the utility model.
Fig. 8 is the structural representation of the outer accessory torque shoulder of the utility model.
The specific embodiment
Below in conjunction with accompanying drawing the utility model is done further detailed description: referring to Fig. 1, a kind of thermal production well direct linkage type insulated tubing comprises outer tube and interior pipe, and outer tube one end representes that with S the other end is represented with T, the outside of pipe in outer tube is welded on, and screw thread is processed on inner pipe.Interior Guan Yiduan is male end A, and the other end is female end N, and the male end A of pipe is connected with female end N in two; See Fig. 2
,Accessory torque shoulder H, interior cylindrical section I, internal thread J, internal conical surface K in being provided with successively on the female end N, in main torque shoulder L and interior end of thread external upset (EU) M.See Fig. 3, be provided with outer end of thread external upset (EU) B, outer accessory torque shoulder C, cylindrical shell of column D, external screw thread E, outer conical surface F and outer main torque shoulder G on the male end A successively.See Fig. 5 and Fig. 4, on the outer main torque shoulder G on the male end A and the female end N in main torque shoulder L cooperate, outer main torque shoulder G with in main torque shoulder L adopt the right angle shoulder; The cooperation of outer conical surface F and internal conical surface K utilizes two taper seats, makes the sealing effectiveness of junction better, and tapering is set between the 1:8-1:10.See Fig. 6, external screw thread E and internal thread J adopt buttress thread, the bearing surface angle of buttress thread
OBe set between-3 °-+3 °, be meant the angle of screw thread bearing surface and vertical tube axis
The spigot surface angle
PBe set between 10 °-20 °, be meant the angle of screw thread spigot surface and vertical tube axis
Its pitch is set at 6 teeth/in, thread taper is 1:16, and thread crest is parallel to the tubing bus, the bus of pipe and outer tube in comprising.See Fig. 7 and Fig. 8; Outer accessory torque shoulder C cooperates with interior accessory torque shoulder H; Outer accessory torque shoulder C and interior accessory torque shoulder H all adopt the negative angle shoulder; The angle U of its outer accessory torque shoulder C negative angle shoulder is set in+10 °-+15 ° between, be meant the outer circular bead surface of outer accessory torque shoulder C and the angle of vertical tube axis; The angle V of interior accessory torque shoulder H negative angle shoulder is set in+15 °～+ 30 ° between, the interior circular bead surface of accessory torque shoulder H and the angle of vertical tube axis in being meant.
Claims (6)
1. thermal production well direct linkage type insulated tubing; Comprise outer tube and interior pipe, the outside of pipe in outer tube is welded on, screw thread is processed on inner pipe; Interior Guan Yiduan is male end (A); The other end is female end (N), and the male end (A) of pipe is connected with female end (N) in two, it is characterized in that being provided with successively on the male end (A) outer end of thread external upset (EU) (B), outer accessory torque shoulder (C), cylindrical shell of column (D), external screw thread (E), outer conical surface (F) and outer main torque shoulder (G); Accessory torque shoulder (H), interior cylindrical section (I), internal thread (J), internal conical surface (K) in being provided with successively on the female end (N), in main torque shoulder (L) and interior end of thread external upset (EU) (M).
2. a kind of thermal production well direct linkage type insulated tubing according to claim 1; It is characterized in that on outer main torque shoulder (G) and the female end (N) on the said male end (A) in main torque shoulder (L) cooperate, outer accessory torque shoulder (C) cooperates with interior accessory torque shoulder (H); Outer main torque shoulder (G) and in main torque shoulder (L) adopt the right angle shoulder, outer accessory torque shoulder (C) and interior accessory torque shoulder (H) employing negative angle shoulder.
3. a kind of thermal production well direct linkage type insulated tubing according to claim 2, it is characterized in that the angle (U) of said outer accessory torque shoulder (C) negative angle shoulder is set in+10 °-+15 ° between; The angle (V) of interior accessory torque shoulder (H) negative angle shoulder is set in+15 °～+ 30 ° between
.
4. a kind of thermal production well direct linkage type insulated tubing according to claim 1 is characterized in that said external screw thread (E) and internal thread (J) adopt buttress thread, and its pitch is set at 6 teeth/in, thread taper is 1:16, and thread crest is parallel to the tubing bus.
5. a kind of thermal production well direct linkage type insulated tubing according to claim 4 is characterized in that the bearing surface angle (O) of said buttress thread is set between-3 °-+3 °, and spigot surface angle (P) is set between 10 °-20 °.
6. a kind of thermal production well direct linkage type insulated tubing according to claim 1 is characterized in that the tapering of said outer conical surface (F) and internal conical surface (K) is set between the 1:8-1:10.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204590071U CN202325279U (en) | 2011-11-18 | 2011-11-18 | Direct-connected heat-insulated oil tube for thermal recovery wells |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204590071U CN202325279U (en) | 2011-11-18 | 2011-11-18 | Direct-connected heat-insulated oil tube for thermal recovery wells |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202325279U true CN202325279U (en) | 2012-07-11 |
Family
ID=46437261
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011204590071U Expired - Fee Related CN202325279U (en) | 2011-11-18 | 2011-11-18 | Direct-connected heat-insulated oil tube for thermal recovery wells |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202325279U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113027350A (en) * | 2021-05-10 | 2021-06-25 | 中海油能源发展股份有限公司工程技术分公司 | Heat-point-free heat insulation oil pipe column structure |
| CN116136164A (en) * | 2021-11-18 | 2023-05-19 | 大庆石油管理局有限公司 | Extra-high temperature high pressure perforating gun |
-
2011
- 2011-11-18 CN CN2011204590071U patent/CN202325279U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113027350A (en) * | 2021-05-10 | 2021-06-25 | 中海油能源发展股份有限公司工程技术分公司 | Heat-point-free heat insulation oil pipe column structure |
| CN116136164A (en) * | 2021-11-18 | 2023-05-19 | 大庆石油管理局有限公司 | Extra-high temperature high pressure perforating gun |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20191219 Address after: 255000 west head of Weisi Road, Qilu Chemical Industry Zone, Linzi District, Zibo City, Shandong Province Patentee after: Zibo Fu ruit heat energy technology Co., Ltd. Address before: 257082 No. 203, South Road, Dongying District, Shandong, Dongying Patentee before: Shengli Oil Field Furuite Petroleum Equipment Co., Ltd. |
|
| TR01 | Transfer of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120711 Termination date: 20201118 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |