CN201661246U - Petroleum expansion pipe threaded joint connection structure - Google Patents
Petroleum expansion pipe threaded joint connection structure Download PDFInfo
- Publication number
- CN201661246U CN201661246U CN2010201160359U CN201020116035U CN201661246U CN 201661246 U CN201661246 U CN 201661246U CN 2010201160359 U CN2010201160359 U CN 2010201160359U CN 201020116035 U CN201020116035 U CN 201020116035U CN 201661246 U CN201661246 U CN 201661246U
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- expansion
- expansion pipe
- petroleum
- thread
- syndeton
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Abstract
The utility model provides a petroleum expansion pipe threaded joint connection structure, and overcomes the problem of sealing failure caused by expansion and deformation at the existing expansion pipe threaded connection part. The petroleum expansion pipe threaded joint connection structure is integrally formed by two or more expansion pipes with female threads at one end and male threads at the other end through threaded connection. Large-diameter parts with the female threads or the male threads are arranged at the two ends of each expansion pipe. The outer diameter of the large-diameter parts is larger than the outer diameter of the middle body part of the expansion pipe. In the process of the expansion of the expansion pipes, since the threaded joint connection structure is not expanded, the sealing effect of the threaded joint connection sealing structure can be ensured.
Description
Technical field
The utility model relates to a kind of petroleum expansion pipe nipple syndeton, particularly oil drilling, completion, the well workover interconnective screw connection structure of expansion tube.
Background technology
Bulged tube technology is exactly that tubing string is descended to the down-hole, with the method for machinery or hydraulic pressure, makes expansion tubing string generation permanent plastic deformation, the internal diameter of well or flow string is enlarged, to satisfy the field produces needs.Tubing string to be expanded is longer sometimes owing to go into the well, and two of needs or many expansion tubes are connected, and to adapt to different down-hole requirements, is connected with external screw thread by internal thread between the adjacent usually expansion tube.Because when expansion tube expands with bloat tool, plastic strain takes place with the expansion tubing string in the junction of screw connection structure, very easily makes connecting thread impaired and cause seal failure, joint takes place leak, and influences expansion effect.
The Chinese patent literature CN1420972A that open day is on May 28th, 2003 discloses a kind of connector of expansible joint, its screwed joint portion in the expanding pipe joint structure is provided with radial ringed groove, the externally threaded part that has with this linkage of box lunch radially is expanded in the part that has internal thread, and when the part that has externally threaded part and have an internal thread is then carried out further radial dilatation, sealing ring axially and is radially compressed, force space collar to abut against sealing ring, form wiper seal with between the relative wall that sealing ring is compressed in space collar and groove.
Yet, in actual application, find, no matter be the disclosed technical scheme of CN1420972A patent documentation, or other expansion tube nipple structure, still there are some problems.In the expansion tube expansion process, expansion tube nipple coupling part also will be along with expansion, because the threaded joint portion of expansion tube certain resilience can occur when expanding, might make so originally to cooperate between the tight screw thread slit to occur, cause thread seal to lose efficacy.
The utility model content
The purpose of this utility model is to provide a kind of non-bloating petroleum expansion pipe nipple syndeton, to overcome the seal failure problem that existing expansion tube threaded joints causes owing to dilatancy.
The petroleum expansion pipe nipple syndeton that the utility model provides, by an end is that the internal thread and the other end are that externally threaded two or many expansion tubes are integral by being threaded, the two ends of described expansion tube are for having described internal thread or described externally threaded particle size part, and the external diameter of described particle size part is too in the intermediate body member external diameter partly of described expansion tube.
The external diameter of described particle size part can be greater than the intermediate body member external diameter 1～5mm partly of described expansion tube.Preferably, the external diameter of described particle size part is greater than the external diameter 2～3mm of the intermediate body member part of described expansion tube.
The length of the described particle size part of the every end of described expansion tube can be 50～5000mm, is preferably 110～500mm.
Described internal thread and described external screw thread can be for being selected from a kind of in triangle thread, trapezoidal thread, buttress thread, round thread, rectangular thread and the hook screw thread.
Described internal thread and described external screw thread can be the screw thread of multistage button.
The described position that is threaded can scribble sealant layer.The place seals with the double thread joint gap, reaches better sealing effectiveness.
Petroleum expansion pipe nipple syndeton of the present utility model is in the expansion tube expansion process, and nipple syndeton part does not expand, and can guarantee that nipple connects the sealing effectiveness of hermetically-sealed construction.
Description of drawings
Fig. 1 is the schematic diagram of a part in the vertical section of petroleum expansion pipe nipple syndeton of the present utility model;
Reference numeral refers to as follows:
The intermediate body member part of 1-expansion tube, 2-particle size part, 3-external screw thread, 4-thread locking adhesive, 5-internal thread, the particle size part of 6-another root expansion tube, the intermediate body member part of 7-another root expansion tube.
The specific embodiment
Below in conjunction with accompanying drawing petroleum expansion pipe nipple syndeton of the present utility model is described further, to help understanding content of the present utility model.
Fig. 1 has represented petroleum expansion pipe nipple syndeton of the present utility model, and wherein, an expansion tube has the intermediate body member part 1 and the particle size part 2 of expansion tube, and particle size part 2 has external screw thread 3; Another root expansion tube has the intermediate body member part 7 of this another root expansion tube and the particle size part 6 of this another root expansion tube, and the particle size part 6 of this another root expansion tube has internal thread 5.Two expansion tubes are threaded togather by described external screw thread 3 and described internal thread 5, and the position that is threaded scribbles thread locking adhesive 4.
The length of the particle size part 6 that the particle size part 2 of described expansion tube and another root expand can be 100～5000mm, is preferably 150～500mm, for example is 260mm; The particle size part 6 that the particle size part 2 of described expansion tube and another root expand will be decided according to hole condition, be generally external diameter 1～200mm greater than expansion tube body 1, being preferably the external diameter 6～20mm greater than expansion tube body 1, for example is the external diameter 12mm greater than expansion tube body 1.
The utility model not only can be used for the casing patching of Oil, Water, Gas well, also can be used for simultaneously newly boring the open hole well borehole wall easily caves in or the stratum have leakage the well section the borehole wall firmly or leak stopping, also can be applicable to deepened well, sidetracked hole.
Claims (8)
1. petroleum expansion pipe nipple syndeton, by an end is that the internal thread and the other end are that externally threaded two or many expansion tubes are integral by being threaded, it is characterized in that: the two ends of described expansion tube are for having described internal thread or described externally threaded particle size part, and the external diameter of described particle size part is greater than the external diameter of the intermediate body member part of described expansion tube.
2. petroleum expansion pipe nipple syndeton according to claim 1 is characterized in that: the external diameter of described particle size part is greater than the external diameter 1～5mm of the intermediate body member part of described expansion tube.
3. petroleum expansion pipe nipple syndeton according to claim 1 is characterized in that: the external diameter of described particle size part is greater than the external diameter 2～3mm of the intermediate body member part of described expansion tube.
4. according to each described petroleum expansion pipe nipple syndeton of claim 1～3, it is characterized in that: the length of the described particle size part of the every end of described expansion tube is 50～5000mm.
5. petroleum expansion pipe nipple syndeton according to claim 4 is characterized in that: the length of the described particle size part of the every end of described expansion tube is 110～500mm.
6. according to each described petroleum expansion pipe nipple syndeton of claim 1～3, it is characterized in that: described internal thread and described external screw thread are to be selected from a kind of in triangle thread, trapezoidal thread, buttress thread, round thread, rectangular thread and the hook screw thread.
7. according to each described petroleum expansion pipe nipple syndeton of claim 1～3, it is characterized in that: described internal thread and described external screw thread are the screw thread of multistage button.
8. according to each described petroleum expansion pipe nipple syndeton of claim 1～3, it is characterized in that: the described position that is threaded scribbles sealant layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201160359U CN201661246U (en) | 2010-02-10 | 2010-02-10 | Petroleum expansion pipe threaded joint connection structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201160359U CN201661246U (en) | 2010-02-10 | 2010-02-10 | Petroleum expansion pipe threaded joint connection structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201661246U true CN201661246U (en) | 2010-12-01 |
Family
ID=43231661
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010201160359U Expired - Fee Related CN201661246U (en) | 2010-02-10 | 2010-02-10 | Petroleum expansion pipe threaded joint connection structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201661246U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103089183A (en) * | 2011-10-31 | 2013-05-08 | 中国石油化工股份有限公司 | Double bellmouth type expansion sleeve packing tool and operating method thereof |
-
2010
- 2010-02-10 CN CN2010201160359U patent/CN201661246U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103089183A (en) * | 2011-10-31 | 2013-05-08 | 中国石油化工股份有限公司 | Double bellmouth type expansion sleeve packing tool and operating method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20101201 Termination date: 20170210 |