CN201671560U - Single hook-shaped end-face metal self-sealing expansion casing thread joint - Google Patents
Single hook-shaped end-face metal self-sealing expansion casing thread joint Download PDFInfo
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- CN201671560U CN201671560U CN2010201531217U CN201020153121U CN201671560U CN 201671560 U CN201671560 U CN 201671560U CN 2010201531217 U CN2010201531217 U CN 2010201531217U CN 201020153121 U CN201020153121 U CN 201020153121U CN 201671560 U CN201671560 U CN 201671560U
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- sealing
- screw thread
- metal self
- thread joint
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Abstract
The utility model relates to a single hook-shaped end-face metal self-sealing expansion casing thread joint, which is used for a screw thread of an expansion casing in the oil and gas well engineering and mainly consists of an external thread joint, an internal thread joint and rectangle rubber inner sealing rings, wherein the thread end part of the external thread joint is provided with an external thread joint metal self-sealing conical surface with non-equal tapers; the outer wall of the root part of the internal thread joint of the expansion casing is provided with a metal self-sealing conical surface with non-equal tapers; the thread root part of the internal thread joint is provided with the rubber sealing ring; a screw thread between the external thread joint and the internal thread joint is a hook-shaped screw thread; and the root part of the external thread joint is provided with the rectangle rubber sealing ring. The single hook-shaped end-face metal self-sealing expansion casing thread joint has a function of sealing for four times, has better sealing completeness and uniformity of expansion strength, overcomes the defects of loss of self-sealing performance after expansion in the prior art and has low processing cost.
Description
Technical field
The utility model relates to the Oil-Gas Well Engineering technical field, be particularly related to expansion sleeve, be the special thread joint that a kind of expansion sleeve connects, be applicable to that the expansion sleeve of no box cupling connects, be applicable to the expansion sleeve subsidy and the expansion sleeve cementing technology of high pressure, high gas rate well.
Background technology
At present, the expansion sleeve technology will become 21 century petroleum drilling and mining industry and play one of technology of key effect.Be mainly used in a plurality of fields such as drilling well, the complicated layer of shutoff, extension hanger and sleeve pipe reparation, the final purpose of this technology is to realize using the sleeve pipe of same size to replace existing multilayer sleeve, tackle the ability of a plurality of bad grounds with raising, improve drillng operation efficient, reduce drilling cost.The expansion sleeve technology is expanded radially into the plastic strain zone with tubing string exactly in well, to reach a kind of drilling engineering new technology that " saving " borehole diameter is a purpose.In drilling well, expansion sleeve is lowered in the protective casing, with special tool(s) and technology the expansion sleeve that is lowered to is expanded to upper strata protective casing inwall then and is close to.But in the open hole portion cementing, lap has suspension and potted component in sleeve pipe.Difference in internal diameters between the two-layer sleeve pipe only is the wall thickness of expansion rear sleeve, thereby saved borehole diameter to greatest extent, the sleeve pipe number of plies that can be lowered to is increased, give deep-well, the drilling well and the casing programme of complex geological condition brings the influence and the great technical economic benefit of " revolutionary character ".
Studies have shown that by computer simulation technology and indoor full-scale investigation: for " waiting tapering " metal self-sealing joint, if sleeve pipe does not expand, these conical surfaces can form self sealss face so, if but sleeve pipe expands, owing to the wall thickness of male connection that waits tapering sealing surface place and female adapter is unequal, be the change wall thickness, cause that sleeve pipe expanded radially rigidity herein is unequal, the radial deformation of two conical surfaces is unequal, become " the non-tapering that waits " after expanding by original " waiting tapering ", thereby lost self sealss.Otherwise,, so just need be designed to the expansion front connector joint of " the non-tapering that waits " if make the back of expanding form the metal self-sealing of " waiting tapering ".
The utility model content
The purpose of this utility model is: a kind of single hook-type end plane metal self-sealing expansion sleeve pipe nipple is provided, overcome conventional screw thread and can not directly be machined in technological deficiency on the thin expansion sleeve of no box cupling and wall thickness, based on the finite element simulation analogue technique of height nonlinear elasticity plasticity screw thread contact problems and non-linear super-elasticity rubber and metal surface contact problems, for expansion sleeve provides a kind of inhomogeneity tapering metal self-sealing expansion sleeve pipe hook screw thread joint such as non-of good sealing integrity and expansion strength that has.
The technical solution adopted in the utility model is: single hook-type end plane metal self-sealing expansion sleeve pipe nipple, mainly be made up of male connection, female adapter and rectangular rubber inner seal ring, it is characterized in that: the thread head in the expansion sleeve male connection has the non-male connection metal self-sealing conical surface that waits tapering; The non-metal self-sealing conical surface that waits tapering is arranged on the root outer wall of expansion sleeve female adapter, and this place is the initial position of escape of liquid, so this place is called sealing for the first time;
At the female adapter thread root is not etc. that the female adapter seal groove is arranged at the top of the metal self-sealing conical surface of tapering, and it is the rubber rectangular ring of rectangle that cross section is arranged in the female adapter seal groove.It is big that rubber rectangular ring has contact range, and this rubber rectangular ring has the very strong sealing effectiveness second time;
Screw thread between male connection and the female adapter is a hook screw thread, and promptly hook screw thread is that the hook screw thread sealing contact surface and the hook screw thread back side are formed.The hook screw thread sealing contact surface is vertical with the screw thread center line, can produce the Metal Contact sealing effectiveness, the gradient of the hook screw thread back side and screw thread center line is 20～25 °, the hook screw thread of this negative angle has very strong sealing effectiveness for the third time and the uniform characteristics of distribution of contact, has stronger axial tensile strength and very strong anti-slip ability simultaneously.
Root in male connection has the male connection seal groove, and it is the rubber rectangular ring of rectangle that cross section is arranged in male connection seal groove 3.Rubber rectangular ring herein is the 4th sealing of single hook-type end plane metal self-sealing expansion sleeve pipe nipple.
Behind the casing expandable, the utlity model has non-wait tapering metallic seal (sealing for the first time), female adapter root rubber seal (sealing for the second time), threading hook face metallic seal (sealing for the third time) and male connection root rubber seal (the 4th sealing), have sealing function altogether four times.
Single hook-type end plane metal self-sealing expansion sleeve pipe nipple based on the Computer Numerical Simulation design of Simulation of the present utility model has the tight interlock of hook-type internal and external threads of negative angle, has eliminated stress and has concentrated the intensity height.The metal self-sealing conical surface of tapering such as non-has been designed in female adapter root and male connection end, and the tapering of the metal self-sealing face in the female adapter is a bit larger tham the tapering of the metal self-sealing face in the male connection.Therefore this utility model has non-metal-metal self sealss, metal-rubber-metal sealing and the sealing of screw thread hook-type face Metal Contact etc. that wait tapering, has sealing integrity and strength evenness.
The beneficial effects of the utility model: single hook-type end plane metal self-sealing expansion sleeve pipe nipple of the utility model " the non-tapering that waits " compared with prior art, uniformity with better sealing integrity and expansion strength, studies have shown that by computer simulation technology and indoor full-scale investigation: existing " waiting tapering " metal self-sealing joint has the deficiency that has lost self sealss after expansion, and single hook-type end plane metal self-sealing expansion sleeve pipe nipple of the utility model " the non-tapering that waits ", overcome the deficiency that has lost self sealss after prior art expands, guaranteed its sealing integrity, processing cost is low.
Description of drawings
Fig. 1 is the one-sided longitudinal cross-section schematic diagram of the utility model list hook-type end plane metal self-sealing expansion sleeve pipe nipple.
Fig. 2 is the local amplification profile of A among the utility model Fig. 1.
Fig. 3 is the local amplification profile of B among the utility model Fig. 1.
Fig. 4 is the local amplification profile of C among the utility model Fig. 1.
Among the figure, 1. male connection, 2. female adapter, 3. male connection seal groove, 4. rubber rectangular ring, 5. hook screw thread, 6. female adapter seal groove, the 7. non-metal self-sealing conical surface that waits tapering, the 8. non-male connection metal self-sealing conical surface that waits tapering, 9. hook screw thread sealing contact surface, 10. the hook screw thread back side.
The specific embodiment
Embodiment 1: with a single hook-type end plane metal self-sealing expansion sleeve pipe nipple is example, and the utility model is described in further detail.
Consult Fig. 1.Single hook-type end plane metal self-sealing expansion sleeve pipe nipple mainly is made up of male connection 1, female adapter 2 and rectangular rubber inner seal ring 4.
Consult Fig. 4.Thread head in expansion sleeve male connection 1 has the non-male connection metal self-sealing conical surface 8 that waits tapering; The non-metal self-sealing conical surface 7 that waits tapering is arranged on the root outer wall of expansion sleeve female adapter 2.Cooperatively interact between the male connection metal self-sealing conical surface 8 of the non-metal self-sealing conical surface 7 that waits tapering and tapering such as non-, play the metallic seal effect.The tapering of the metal self-sealing conical surface 7 of non-tapering such as grade is greater than 1.5 ° of the male connection metal self-sealing conical surface 8 taperings.
Consult Fig. 4.At female adapter 2 thread roots is not etc. that a female adapter seal groove 6 is arranged at the top of the metal self-sealing conical surface 7 of tapering, the rubber rectangular ring 4 that in female adapter seal groove 6 cross section to be arranged be rectangle;
Consult Fig. 3.Screw thread between male connection 1 and the female adapter 2 is a hook screw thread, and promptly hook screw thread is that the hook screw thread sealing contact surface 9 and the hook screw thread back side 10 are formed.Hook screw thread sealing contact surface 9 is vertical with the screw thread center line, and the hook screw thread back side 10 is 22 ° with the gradient of screw thread center line.
Consult Fig. 2.Root in male connection 1 has a male connection seal groove 3, the rubber rectangular ring 4 that in male connection seal groove 3 cross section to be arranged be rectangle.
Claims (1)
1. single hook-type end plane metal self-sealing expansion sleeve pipe nipple, mainly be made up of male connection (1), female adapter (2) and rectangular rubber inner seal ring (4), it is characterized in that: the thread head in expansion sleeve male connection (1) has the non-male connection metal self-sealing conical surface (8) that waits tapering; The non-metal self-sealing conical surface (7) that waits tapering is arranged on the root outer wall of expansion sleeve female adapter (2);
At female adapter (2) thread root is not etc. that female adapter seal groove (6) is arranged at the top of the metal self-sealing conical surface (7) of tapering, and it is the rubber rectangular ring (4) of rectangle that cross section is arranged in female adapter seal groove (6);
Screw thread between male connection (1) and the female adapter (2) is a hook screw thread, and promptly hook screw thread is that hook screw thread sealing contact surface (9) and the hook screw thread back side (10) are formed.Hook screw thread sealing contact surface (9) is vertical with the screw thread center line, and the hook screw thread back side (10) are 20～25 ° with the gradient of screw thread center line;
Root in male connection (1) has male connection seal groove (3), and it is the rubber rectangular ring (4) of rectangle that cross section is arranged in male connection seal groove (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201531217U CN201671560U (en) | 2010-04-07 | 2010-04-07 | Single hook-shaped end-face metal self-sealing expansion casing thread joint |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201531217U CN201671560U (en) | 2010-04-07 | 2010-04-07 | Single hook-shaped end-face metal self-sealing expansion casing thread joint |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201671560U true CN201671560U (en) | 2010-12-15 |
Family
ID=43328972
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010201531217U Expired - Lifetime CN201671560U (en) | 2010-04-07 | 2010-04-07 | Single hook-shaped end-face metal self-sealing expansion casing thread joint |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201671560U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103075115A (en) * | 2012-12-25 | 2013-05-01 | 胜利油田龙玺石油钢管有限公司 | Double-thread quick sleeve joint |
| CN108756773A (en) * | 2018-06-05 | 2018-11-06 | 江苏常宝钢管股份有限公司 | Direct linkage type oil bushing threaded connector structure |
-
2010
- 2010-04-07 CN CN2010201531217U patent/CN201671560U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103075115A (en) * | 2012-12-25 | 2013-05-01 | 胜利油田龙玺石油钢管有限公司 | Double-thread quick sleeve joint |
| CN108756773A (en) * | 2018-06-05 | 2018-11-06 | 江苏常宝钢管股份有限公司 | Direct linkage type oil bushing threaded connector structure |
| CN108756773B (en) * | 2018-06-05 | 2024-04-02 | 江苏常宝钢管股份有限公司 | Directly-connected oil casing threaded joint structure |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20101215 |