CN201202903Y - High expansion rate allowance pipe junction seal structure - Google Patents
High expansion rate allowance pipe junction seal structure Download PDFInfo
- Publication number
- CN201202903Y CN201202903Y CNU2008200631687U CN200820063168U CN201202903Y CN 201202903 Y CN201202903 Y CN 201202903Y CN U2008200631687 U CNU2008200631687 U CN U2008200631687U CN 200820063168 U CN200820063168 U CN 200820063168U CN 201202903 Y CN201202903 Y CN 201202903Y
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- China
- Prior art keywords
- seal
- pipe
- compensation
- inclination angle
- screw
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- Expired - Fee Related
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Abstract
The utility model relates to a high-expansion rate compensation pipe joint seal structure for casing compensation in oil and gas well. The seal structure can make the casing pipe and the compensation pipe meet the seal requirements before and after expansion, and can keep enough connection strength, press-resistance and overtorque-resistance capability. The technical proposal thereof is that: an inward obliquity is arranged at the outer screw circular bead of the screw joint, and is matched with the obliquity of the screw end surface; 1-3 rubber seal rings whose section is semicircle shape are arranged at the outer screw nearby the circular bead; a step is arranged on the outer screw surface for arranging the rubber or metal seal ring, and is matched with the step in the screw. After the compensation pipe is expanded, three mechanisms for ensuring the joint seal capability are added under the condition that the original thread is deprived of seal performance because of distortion, thereby strengthening the joint press-resistance and overtorque-resistance capability, improving the seal effect after the compensation pipe is expanded, preventing the liquid in the pipe from impacting the thread button; and the utility model can be used in the compensation pipe joint seal structure for the casing compensation in oil and gas well.
Description
Technical field
The utility model relates to a kind of subsidy pipe joint sealing structure that is used for the subsidy of oil gas casing, is a kind of high expansivity subsidy pipe joint sealing structure form.
Technical background
At present, there is following problem in actual use in the round thread on state's inner sleeve: the one, and the shoulder of joint mostly is the plane shoulder perpendicular to casing axis, and behind casing expandable, shoulder also deforms, and compressive strength also obviously reduces with the ability that resisted moment of torsion.The 2nd, threaded together is all leaned in plain coupler, and the squeezing bushing end face reaches the purpose of sealing, and after sleeve pipe was inflated, box face deformed, and lost sealability.These defectives are difficult to overcome, and are further improved and innovate.
Summary of the invention:
The purpose of this utility model is: can both satisfy seal request before and after making sleeve pipe, subsidy tube swelling, and enough join strengths and resistance to compression are arranged, resisted the ability of moment of torsion, loosening and good seal do not take place in the back joint that expands, and the spy provides a kind of high expansivity subsidy pipe joint sealing structure.
In order to achieve the above object, the utility model is by the following technical solutions: a kind of high expansivity subsidy pipe joint sealing structure, inclination angle, seal ring, step by inclination angle, internal thread and the shoulder place thereof at outside thread and shoulder place thereof are formed, it is characterized in that: there is an inside inclination angle 3 at the shoulder place of the outside thread 1 of this inipple, and inclination angle 3 cooperates with the inclination angle 4 of internal thread 2 end faces; Near the shoulder place 1 to 3 cross section being installed at outside thread 1 is semicircular rubber seal 5; Outside thread 1 end face is processed with a step can install rubber or metal o-ring 7, and seal ring 7 matches with the step 6 of internal thread 2 inside.The inclination angle, shoulder place 3 of outside thread 1 and the inclination angle 4 of internal thread 2 end faces, its angle is in 20 to 80 degree scopes.
When being inflated, the shoulder 3 of outside thread 1 is limited in its inside with internal thread end face 4 at the subsidy pipe joint, in conjunction with tightr, can obtain the ability that strengthens compressive strength, resisted moment of torsion in inflation process, improves sealing effect simultaneously.The seal ring of semi-circular cross-section is adapted at working under the less situation in gap more, can improve the sealing effect behind the subsidy tube swelling when saving the space.Seal ring 7 matches with the step 6 of internal thread 2 inside.In the process that screw thread is tightened and is inflated plastic deformation taking place, fill the space at internal thread step 6 places, play seal action, stops tube fluid directly to impact the screw thread screw thread.
Compared with prior art, the beneficial effects of the utility model are: after the subsidy pipe was inflated, original screw thread lost under the situation of sealability because of distortion, had increased the sealability of three place mechanisms assurance joints; Externally threaded shoulder inclination angle cooperates with internal thread end face inclination angle, has improved sealing effect; The seal ring of semi-circular cross-section has improved the sealing effect behind the subsidy tube swelling; The outside thread end-face seal ring cooperates with the internal thread interior step, has played seal action, and a plurality of mechanisms have guaranteed the sealing effect of joint.
Description of drawings
Fig. 1 is the high expansivity subsidy of a utility model pipe joint sealing structure schematic representation.Among the figure: 1. outside thread; 2. internal thread; 3. inclination angle, outside thread shoulder place; 4. inclination angle, internal thread end face place; 5. semicircular rubber seal; 6. internal thread interior step; 7. seal ring.
Fig. 2 is that the cross section is the schematic cross-section of semicircular rubber seal 5 in the high expansivity subsidy of the utility model pipe joint sealing structure.
Embodiment
Below in conjunction with accompanying drawing mode of execution of the present utility model is described further.
According to shown in Figure 1, there is an inside inclination angle 3 at the shoulder place of the outside thread 1 of inipple, and it cooperates with the inclination angle 4 of internal thread end face, can obtain the ability that strengthens compressive strength, resisted moment of torsion, improves sealing effect simultaneously.Near the shoulder place 1 to 3 cross section being installed at outside thread is semicircular rubber seal 5, can improve the sealing effect behind the subsidy tube swelling.The outside thread end face is processed with a step can install rubber or metal o-ring 7, it matches with the step 6 of internal thread inside, and crush seal circle in the process that screw thread is tightened and is inflated makes it to deform, play seal action, stop tube fluid directly to impact the screw thread screw thread.
The production method of this high expansivity subsidy pipe joint sealing structure is: at the subsidy pipe two ends that process, on high-precision numerical control pipe thread lathe, use dedicated tool to process the internal and external screw thread joint respectively.
Claims (3)
1. one kind high expansivity is subsidized pipe joint sealing structure, inclination angle, semicircle seal ring by inclination angle, internal thread and the shoulder place at outside thread and shoulder place are formed, it is characterized in that: there is an inside inclination angle (3) at the outside thread of this inipple (1) shoulder place, and inclination angle (3) cooperate with the inclination angle (4) of internal thread (2) end face; Near the shoulder place 1 to 3 rubber seal (5) is installed at outside thread (1); Step of outside thread (1) end face processing is installed rubber or metal o-ring (7), and seal ring (7) matches with the step (6) of internal thread (2) inside.
2. high expansivity subsidy pipe joint sealing structure according to claim 1, it is characterized in that: the inclination angle (4) of the inclination angle (3) at outside thread (1) shoulder place and internal thread (2) end face, its angle is in 20 to 80 degree scopes.
3. high expansivity subsidy pipe joint sealing structure according to claim 1, it is characterized in that: in the rubber seal (5) that outside thread (1) is installed near the shoulder place, the cross section of its seal ring (5) is semicircle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200631687U CN201202903Y (en) | 2008-04-22 | 2008-04-22 | High expansion rate allowance pipe junction seal structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200631687U CN201202903Y (en) | 2008-04-22 | 2008-04-22 | High expansion rate allowance pipe junction seal structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201202903Y true CN201202903Y (en) | 2009-03-04 |
Family
ID=40425214
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008200631687U Expired - Fee Related CN201202903Y (en) | 2008-04-22 | 2008-04-22 | High expansion rate allowance pipe junction seal structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201202903Y (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102094985A (en) * | 2010-12-06 | 2011-06-15 | 无锡四方友信股份有限公司 | Corrosion-resisting high-intensity O-ring seal for tons of packaging dump butterfly valve |
| CN102460053A (en) * | 2009-05-06 | 2012-05-16 | 塞彭公司 | Tube bundle equipment with liquid flow regulator elements |
| CN102817562A (en) * | 2012-08-14 | 2012-12-12 | 中国石油天然气集团公司 | Sleeve joint |
| CN103321589A (en) * | 2013-05-20 | 2013-09-25 | 淮北林光钻探机电工程有限公司 | Waterproof end-expanding-prevention drill rod connection unit |
| CN108138994A (en) * | 2015-10-21 | 2018-06-08 | 新日铁住金株式会社 | Screw joint for steel pipe |
| CN112610763A (en) * | 2020-12-25 | 2021-04-06 | 安徽砼宇特构科技有限公司 | Expansion adhesive tape connecting structure |
-
2008
- 2008-04-22 CN CNU2008200631687U patent/CN201202903Y/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102460053A (en) * | 2009-05-06 | 2012-05-16 | 塞彭公司 | Tube bundle equipment with liquid flow regulator elements |
| CN102094985A (en) * | 2010-12-06 | 2011-06-15 | 无锡四方友信股份有限公司 | Corrosion-resisting high-intensity O-ring seal for tons of packaging dump butterfly valve |
| CN102817562A (en) * | 2012-08-14 | 2012-12-12 | 中国石油天然气集团公司 | Sleeve joint |
| CN102817562B (en) * | 2012-08-14 | 2014-09-03 | 中国石油天然气集团公司 | Sleeve joint |
| CN103321589A (en) * | 2013-05-20 | 2013-09-25 | 淮北林光钻探机电工程有限公司 | Waterproof end-expanding-prevention drill rod connection unit |
| CN103321589B (en) * | 2013-05-20 | 2016-03-09 | 淮北林光钻探机电工程有限公司 | Waterproof end-expanding-prevendrill drill rod connection unit |
| CN108138994A (en) * | 2015-10-21 | 2018-06-08 | 新日铁住金株式会社 | Screw joint for steel pipe |
| CN108138994B (en) * | 2015-10-21 | 2020-01-24 | 日本制铁株式会社 | Threaded joint for steel pipe |
| CN112610763A (en) * | 2020-12-25 | 2021-04-06 | 安徽砼宇特构科技有限公司 | Expansion adhesive tape connecting structure |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090304 Termination date: 20110422 |