CN202467732U - High-temperature-resistant expansion pipe string - Google Patents
High-temperature-resistant expansion pipe string Download PDFInfo
- Publication number
- CN202467732U CN202467732U CN2012200798573U CN201220079857U CN202467732U CN 202467732 U CN202467732 U CN 202467732U CN 2012200798573 U CN2012200798573 U CN 2012200798573U CN 201220079857 U CN201220079857 U CN 201220079857U CN 202467732 U CN202467732 U CN 202467732U
- Authority
- CN
- China
- Prior art keywords
- expansion
- tubing string
- connecting rod
- rod assembly
- temperature
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Abstract
The utility model relates to a high-temperature-resistant expansion pipe string, which comprises a connecting rod assembly, wherein one end of the connecting rod assembly is connected with a joint; the other end of the connecting rod assembly is connected with an expansion cone assembly; a plurality of pipe strings are arranged on the peripheries of the connecting rod assembly and the expansion cone assembly; adjacent pipe strings are connected through cone-shaped screw threads; and protective sleeves are arranged at connecting parts of adjacent pipe strings. By adopting the technical scheme, the high-temperature-resistant expansion pipe string has the advantages as follows: as the protective sleeves are arranged at the connecting parts among the pipe strings, the connecting parts of the pipe strings have low probability of being separated in the expansion process and after the expansion; and besides, the pipe strings are made of high-temperature-resistant materials, so that the pipe strings not only have enough strength, impact-resistant toughness, corrosion resistance, wear resistance and fracture resistance, but also resist to high temperature, so that the use range of the expansion pipe string is extended and the service life of the expansion pipe string is prolonged.
Description
Technical field
The utility model relates to a kind of OCTG, relates to a kind of employed expansion tubing string when in the oil exploitation process, drilling well being repaired specifically.
Background technology
Bulged tube technology is a new technology in petroleum works field; This technology is to make the expansion tube that is lowered in the oil gas well well produce expanded radially through methods such as machinery or hydraulic pressure; Expansion tube is close on the outer field borehole wall or the sleeve pipe, thereby is reached the purpose that the breakage of casing damaged well is repaired, reduced production costs.Characteristics such as expansion tube casing damaged well recovery technique has that technology is simple, less investment and instant effect, obvious to the crude oil effect of increasing production, compare with traditional handicraft, in the suitable zone of condition, cost can practice thrift 70%, and the time shortens 80%.
Its technological principle is: after the casing damaged well section is carried out shaping or milling processing, with oil pipe is repaired the expansion tube tubing string down to the needs subsidy well section, in oil pipe, suppress with high-pressure pump on ground; After expansion tube emission cavity internal pressure reached certain numerical value, it is up with oil pipe that expansion cone promotes oil pipe, when the expansion cone Top Runby surpasses the expansion tube column length; Oil jacket is communicated with, and pump pressure descends, and expansion tube is accomplished and expanded; And be close to basic internal surface of sleeve pipe, reach grappling, sealing and repair requirement.Play flowline then, drill through plug under the expansion tubing string, accomplish and repair.
But, in petroleum drilling and mining, also than higher, not only must have enough intensity to the requirement of expansion tubing string, tough, erosion resistant, wear-resistant and anti-breaking, but also can be high temperature resistant.At present, must expand tubing string in the petroleum drilling and mining aspect high temperature resistant, poor-performing can not satisfy the needs of petroleum drilling and mining.
The utility model content
The problem that the utility model will solve is to above problem, and a kind of high temperature resistant expansion tubing string is provided, solving in petroleum drilling and mining, and expansion tube major gene resistance to elevated temperatures difference and reduce the problem in its application life.
For addressing the above problem, the technical scheme that the utility model adopted is:
High temperature resistant expansion tubing string; Comprise the connecting rod assembly; One end of connecting rod assembly is connected with joint, and the other end of connecting rod assembly is connected with the expansion cone assembly, it is characterized in that: the periphery of said connecting rod assembly and expansion cone assembly is provided with some endowels; Connect through tapered thread between the adjacent tubing string, the junction of adjacent tubing string is provided with protective sleeve.
[0007]As a kind of improvement:
The junction of said adjacent two expansion tubing strings is provided with back-up ring and O RunddichtringO.
As further improvement:
Said tubing string is provided with dustproof fairlead near an end of joint.
Said tubing string is connected with down plug near an end of expansion cone assembly.
The utility model is taked above technical scheme, has the following advantages: because the junction between each expansion tube is provided with protective sleeve, so, in the expansion process of expansion tubing string with expand after difficult separation of junction.In addition, expansion tube is processed with exotic material, makes the expansion tubing string not only have enough intensity, tough, erosion resistant, wear-resistant and anti-breaking, can also be high temperature resistant, enlarged the scope of application of expansion tubing string, and prolonged its application life.
Below in conjunction with accompanying drawing and embodiment the utility model is described further.
Description of drawings
Accompanying drawing 1 is the structural representation of high temperature resistant expansion tubing string among the utility model embodiment;
Accompanying drawing 2 is the enlarged drawing at A place in the accompanying drawing 1.
Among the figure: plug under the 1-; 2-expansion cone assembly; 3-connecting rod assembly; 4-is high temperature resistant expansion tubing string; The 5-protective sleeve; 6-O RunddichtringO; The 7-back-up ring; The 8-fairlead that prevents dust; The 9-joint.
The specific embodiment
Embodiment: shown in accompanying drawing 1 and accompanying drawing 2; High temperature resistant expansion tubing string comprises connecting rod assembly 3, and an end of connecting rod assembly 3 is connected with joint 9; The other end of connecting rod assembly 3 is connected with expansion cone assembly 2, and the periphery of said connecting rod assembly 3 and expansion cone assembly 2 is provided with some endowels 4.
Connect through tapered thread between the adjacent tubing string 4; The junction of adjacent tubing string 4 is provided with protective sleeve 5; The junction of said adjacent two endowels 4 is provided with back-up ring 7 and O RunddichtringO 6; Said tubing string 4 is provided with dustproof fairlead 8 near an end of joint 9, and tubing string 4 is connected with down plug 1 near an end of expansion cone assembly 2.
Can repair the length of casing damaged well sleeve pipe as required, increase or reduce the quantity of high temperature resistant expansion tubing string 4, damage the needs that sleeve pipe is repaired thereby satisfy different length.
Claims (4)
1. high temperature resistant expansion tubing string; Comprise connecting rod assembly (3); One end of connecting rod assembly (3) is connected with joint (9), and the other end of connecting rod assembly (3) is connected with expansion cone assembly (2), it is characterized in that: the periphery of said connecting rod assembly (3) and expansion cone assembly (2) is provided with some endowels (4); Connect through tapered thread between the adjacent tubing string (4), the junction of adjacent tubing string (4) is provided with protective sleeve (5).
2. high temperature resistant expansion tubing string as claimed in claim 1 is characterized in that: the junction of said adjacent two endowels (4) is provided with back-up ring (7) and O RunddichtringO (6).
3. high temperature resistant expansion tubing string as claimed in claim 1 is characterized in that: said tubing string (4) is provided with dustproof fairlead (8) near an end of joint (9).
4. high temperature resistant expansion tubing string as claimed in claim 1 is characterized in that: said tubing string (4) is connected with down plug (1) near an end of expansion cone assembly (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200798573U CN202467732U (en) | 2012-03-06 | 2012-03-06 | High-temperature-resistant expansion pipe string |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200798573U CN202467732U (en) | 2012-03-06 | 2012-03-06 | High-temperature-resistant expansion pipe string |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202467732U true CN202467732U (en) | 2012-10-03 |
Family
ID=46915898
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012200798573U Expired - Fee Related CN202467732U (en) | 2012-03-06 | 2012-03-06 | High-temperature-resistant expansion pipe string |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202467732U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103696718A (en) * | 2013-12-19 | 2014-04-02 | 中国石油天然气股份有限公司 | Method and device for repairing double-clamping-sleeve of expansion pipe of long section of casing damage well in layered partition manner |
-
2012
- 2012-03-06 CN CN2012200798573U patent/CN202467732U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103696718A (en) * | 2013-12-19 | 2014-04-02 | 中国石油天然气股份有限公司 | Method and device for repairing double-clamping-sleeve of expansion pipe of long section of casing damage well in layered partition manner |
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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: 20121003 Termination date: 20130306 |