CN2549162Y - Air-tight threaded joint of petroleum casing - Google Patents
Air-tight threaded joint of petroleum casing Download PDFInfo
- Publication number
- CN2549162Y CN2549162Y CN 02209453 CN02209453U CN2549162Y CN 2549162 Y CN2549162 Y CN 2549162Y CN 02209453 CN02209453 CN 02209453 CN 02209453 U CN02209453 U CN 02209453U CN 2549162 Y CN2549162 Y CN 2549162Y
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- China
- Prior art keywords
- conical surface
- screw
- sealing
- thread
- box cupling
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- Expired - Lifetime
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- Non-Disconnectible Joints And Screw-Threaded Joints (AREA)
Abstract
The utility model discloses an oil sleeve air sealing screw joint, which is characterized in that the two ends of a coupling are symmetric, the female screw at each end is formed by an acme thread, and the front of the female screw is provided with an internal sealing conical surface; the end of the coupling internal conical surface is provided with a coupling internal torsion shoulder, and the screw at each end is connected with the sealing conical surface through a cutter withdrawing slot; moreover, a the front of a male screw at the end of the sleeve is provided with an external sealing conical surface, and the end of the external sealing conical surface is provided with an external torsion shoulder; the coupling internal sealing conical surface and the internal torsion shoulder contact the external sealing conical surface at the end of the sleeve and the external torsion shoulder. As the oil sleeves are connected in a metal-metal sealing manner, the utility model not only has reliable sealing and high air sealing performance as well as ensuring accurate screw positioning, but also has effects of enhancing the sealing capability, minimizing the bonding possibility of the screw and improving the abrasion resistance of the screw as well as reducing the disadvantages caused by the screw thread oil sealed after screwing.
Description
Technical field
The utility model is the hermetic seal connector of relevant seal for pipe joints connector, particularly petroleum casing pipe.
Background technology
Over past ten years, natural gas well drilling hole number constantly increases, and steam for thermal recovery injects also to be increased, and improves the requirement that gas sealing ability has become new designs of threaded joints.Obviously, if contact pressure height on the sealing surface, gas leaks and just is difficult for taking place.And when there was the gap in joint, no matter how high local contact pressure is, gas always leaked by the gap.Common API joint, owing to have the gap between screw thread, the air seal performance is very low.
Summary of the invention
In order to address the above problem, the utility model provides a kind of casing joint with gas sealing ability, and to be implemented under the high pressure condition, gas does not leak.
To achieve the above object, technical solution of the present utility model is a kind of petroleum casing pipe air-tight seal screw joint of design, comprise the box thread of box cupling, the male thread of cannula tip, box thread and male thread cooperatively interact, it is characterized in that described box cupling two-end structure is for being symmetrical arranged, the box thread of each end is to be made of buttress thread 1, sealing cone 2 in its place ahead has, the end of sealing cone 2 is processed with box cupling internal torque shoulder 3 in box cupling, and the screw thread of each end is connected with sealing cone by escape 4; There is the external seal conical surface 5 in male thread the place ahead of described cannula tip, and torque shoulder 6 outside its end is processed with, and sealing cone 2 and internal torque shoulder 3 contact with the external seal conical surface 5 and the outer torque shoulder 6 of petroleum casing pipe end in the box cupling.
Simultaneously, the outer torque shoulder 6 of box cupling internal torque shoulder 3 and cannula tip is wedge shape.
The tapering of the external seal conical surface 5 of sealing cone 2 and cannula tip is 1: 10 in the processing box cupling.
Effect of the present utility model is that sealing is reliable, the gas sealing ability height because the connected mode and the joint of this petroleum casing pipe air-tight seal screw joint employing band box cupling are metal to metal seal; Owing to the torque shoulder of negative angle is arranged, has just guaranteed that accurate twisting connects the location, strengthened sealability simultaneously; Adopt screw thread design of the present utility model, reduced the possibility of screw thread generation thread gluing to greatest extent, improved the antiwear property of screw thread, also reduced to twist connecing the back by the adverse effect that dope produced of shutoff.
Description of drawings
Fig. 1 is a box cupling semi-section schematic diagram.
Fig. 2 is a cannula tip semi-section schematic diagram.
Fig. 3 is box cupling and sleeve pipe coupling part schematic diagram.
Among the figure: 1, screw thread 2, interior sealing cone 3, internal torque shoulder
4, escape 5, the external seal conical surface 6, outer torque shoulder 6
The specific embodiment
Reaching embodiment is in conjunction with the accompanying drawings described in detail.
As Fig. 1, Fig. 2, shown in Figure 3, the petroleum casing pipe air-tight seal screw joint adopts the box cupling connected mode, the box cupling two-end structure is for being symmetrical arranged, the box thread of each end is to be made of buttress thread 1, sealing cone 2 in its place ahead has, the end of sealing cone 2 is processed with box cupling internal torque shoulder 3 in box cupling, and the screw thread of each end is connected with sealing cone by escape 4; There is the external seal conical surface 5 in male thread the place ahead of described petroleum casing pipe end, and torque shoulder 6 outside its end is processed with, and sealing cone 2 and internal torque shoulder 3 contact with the external seal conical surface 5 and the outer torque shoulder 6 of petroleum casing pipe end in the box cupling.
Simultaneously, the outer torque shoulder 6 of box cupling internal torque shoulder 3 and cannula tip is wedge shape.
The tapering of sealing cone 2 is 1: 10 in Fig. 2 middle sleeve external seal conical surface 5 and the box cupling, the measurement diameter of sealing cone 2 is less than the measurement diameter of the petroleum casing pipe external seal conical surface 5 in the box cupling, the measurement diameter of the sealing cone 2 and the sleeve pipe external seal conical surface 5 guarantees that according to the tolerance processing of design the magnitude of interference between the sealing cone 2 and 5 can satisfy the requirement of air seal in the box cupling.Box cupling internal torque shoulder 3 provides accurate localization, twist connect after, the sealing cone 2 and 5 the diameter magnitude of interference are in the scope of a designing requirement.Internal torque shoulder 3, outer torque shoulder 6 all are designed to the wedge structure of negative angle, can strengthen the sealability of metal to metal seal.
The threaded portion of each end of petroleum casing pipe air-tight seal screw joint is to be made of buttress thread 1, adopt the petroleum casing pipe of this screw thread, when the wall thickness of body during in certain scope, the bonding strength of petroleum casing pipe air-tight seal screw joint is higher than the yield strength of body.
Concrete enforcement petroleum casing pipe air-tight seal screw joint of the present utility model can adopt following data:
The box thread of petroleum casing pipe air-tight seal screw joint adopts buttress thread, and the angle that the angle of carrying side is 3 °, import the side is that 10 °, the pitch of screw thread are that 0.200in, the thickness of screw thread on pitch diameter of thread line are that the height of 0.100in, screw thread is that the tapering of 0.062in, screw thread is 0.0625in/in.The male thread of petroleum casing pipe air-tight seal screw joint adopts buttress thread equally, and the angle that the angle of carrying the side is 3 °, import the side is that 10 °, the pitch of screw thread are that 0.200in, the thickness of screw thread on pitch diameter of thread line are that the tapering of 0.099in, screw thread is 0.0625in/in.For improving petroleum casing pipe air-tight seal screw joint wear resistance, the tooth depth of box thread is slightly higher than male thread.
Claims (3)
1, a kind of petroleum casing pipe air-tight seal screw joint, comprise the box thread of box cupling, the male thread of cannula tip, box thread and male thread cooperatively interact, it is characterized in that described box cupling two-end structure is for being symmetrical arranged, the box thread of each end is to be made of buttress thread (1), interior sealing cone (2) is arranged in its place ahead, and the end of sealing cone in box cupling (2) is processed with box cupling internal torque shoulder (3), and the screw thread of each end is connected with sealing cone by escape (4); There is the external seal conical surface (5) in male thread the place ahead of described petroleum casing pipe end, torque shoulder outside its end is processed with (6), and sealing cone (2) and internal torque shoulder (3) contact with the external seal conical surface (5) and the outer torque shoulder (6) of cannula tip in the box cupling.
2, petroleum casing pipe air-tight seal screw joint according to claim 1 is characterized in that the outer torque shoulder (6) of described box cupling internal torque shoulder (3) and cannula tip is wedge shape.
3, petroleum casing pipe air-tight seal screw joint according to claim 1 is characterized in that the tapering of the external seal conical surface (5) of interior sealing cone (2) of described box cupling and cannula tip is 1: 10.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02209453 CN2549162Y (en) | 2002-04-05 | 2002-04-05 | Air-tight threaded joint of petroleum casing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02209453 CN2549162Y (en) | 2002-04-05 | 2002-04-05 | Air-tight threaded joint of petroleum casing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2549162Y true CN2549162Y (en) | 2003-05-07 |
Family
ID=33689866
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02209453 Expired - Lifetime CN2549162Y (en) | 2002-04-05 | 2002-04-05 | Air-tight threaded joint of petroleum casing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2549162Y (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011054161A1 (en) * | 2009-11-04 | 2011-05-12 | 天津钢管集团股份有限公司 | Hermetic threaded joint |
| CN102678071A (en) * | 2012-06-06 | 2012-09-19 | 无锡西姆莱斯石油专用管制造有限公司 | High-airtightness special buttress thread sleeve connection joint |
| CN102720440A (en) * | 2012-06-16 | 2012-10-10 | 无锡西姆莱斯石油专用管制造有限公司 | High-sealed BCSG joint |
| CN105298411A (en) * | 2015-11-18 | 2016-02-03 | 中国石油集团渤海石油装备制造有限公司 | Sleeve joint structure |
| CN111456649A (en) * | 2020-04-10 | 2020-07-28 | 刘超 | Special casing pipe nipple for oil well |
| CN111963076A (en) * | 2020-08-05 | 2020-11-20 | 中国石油天然气集团有限公司 | Air-tight screw-connected pipe joint |
| CN112525415A (en) * | 2020-11-02 | 2021-03-19 | 天津钢管制造有限公司 | Pressure detection method for oil tapping pressure in oil casing coupling |
-
2002
- 2002-04-05 CN CN 02209453 patent/CN2549162Y/en not_active Expired - Lifetime
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011054161A1 (en) * | 2009-11-04 | 2011-05-12 | 天津钢管集团股份有限公司 | Hermetic threaded joint |
| CN101696621B (en) * | 2009-11-04 | 2012-05-16 | 天津钢管集团股份有限公司 | Air-tight seal screw joint |
| CN102678071A (en) * | 2012-06-06 | 2012-09-19 | 无锡西姆莱斯石油专用管制造有限公司 | High-airtightness special buttress thread sleeve connection joint |
| CN102720440A (en) * | 2012-06-16 | 2012-10-10 | 无锡西姆莱斯石油专用管制造有限公司 | High-sealed BCSG joint |
| CN102720440B (en) * | 2012-06-16 | 2015-09-02 | 无锡西姆莱斯石油专用管制造有限公司 | High sealability buttress thread casing joint |
| CN105298411A (en) * | 2015-11-18 | 2016-02-03 | 中国石油集团渤海石油装备制造有限公司 | Sleeve joint structure |
| CN111456649A (en) * | 2020-04-10 | 2020-07-28 | 刘超 | Special casing pipe nipple for oil well |
| CN111963076A (en) * | 2020-08-05 | 2020-11-20 | 中国石油天然气集团有限公司 | Air-tight screw-connected pipe joint |
| CN112525415A (en) * | 2020-11-02 | 2021-03-19 | 天津钢管制造有限公司 | Pressure detection method for oil tapping pressure in oil casing coupling |
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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: TIANJIN STEEL TUBE GROUP CO., LTD. Free format text: FORMER NAME: TIANJIN PIPE CO., LTD. |
|
| CP01 | Change in the name or title of a patent holder |
Address after: Jintang Road, Dongli District, Tianjin, China: 300301 Patentee after: Tianjin Steel Pipe Group Co., Ltd. Address before: Jintang Road, Dongli District, Tianjin, China: 300301 Patentee before: Tianjin steel Pipe Co., Ltd. |
|
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |
Expiration termination date: 20120405 Granted publication date: 20030507 |