CN202832276U - Coiled tubing with zones with different intensity - Google Patents
Coiled tubing with zones with different intensity Download PDFInfo
- Publication number
- CN202832276U CN202832276U CN 201220340482 CN201220340482U CN202832276U CN 202832276 U CN202832276 U CN 202832276U CN 201220340482 CN201220340482 CN 201220340482 CN 201220340482 U CN201220340482 U CN 201220340482U CN 202832276 U CN202832276 U CN 202832276U
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- coiled tubing
- pipeline section
- intensity rank
- intensity
- section
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Abstract
A coiled tubing with zones with different intensity is at least formed by a pipe section with a higher intensity level (1) and a pipe section with a lower intensity level (2), wherein the pipe section with the higher intensity level (1) is abutted against the pipe section with the lower intensity level (2) end-to-end. Outer diameters of the pipe section with the higher intensity level (1) and the lower intensity level (2) equal to thicknesses of walls of the outer diameters of the pipe section with the higher intensity level (1) and the lower intensity level (2). Compared with the prior art, under conditions that the outer diameters and the thicknesses of the walls of the coiled tubing do not change, intensity changes in a length direction, and therefore a plurality of zones with the different intensity are provided in the length direction of the coiled tubing and work depth and safety of the coiled tubing are improved.
Description
Technical field
The utility model relates to petroleum gas tubing technical field, is specifically related to a kind of coiled tubing with varying strength section.
Background technology
Coiled tubing (CT) also claim flexible pipe, coil pipe, be a kind of joint length hundreds of rice on myriametre, the petroleum pipe column that do not have box cupling to connect, its caliber is generally 20-89mm, by reel disc around getting up so that accumulating.Coiled tubing need to be derived from reel when operation, and enters and be suspended on operation in the pit shaft by guide arch (gooseneck) and injection head; Can from pit shaft, trip out after operation is finished, rewind on the reel in order to using next time.Coiled tubing generally adopts the manufacturing of low-carbon microalloy material.
Because continuous oil pipe operation pit is deeply generally between 2000 meters to 7000 meters, coiled tubing to some strength, increase along with depth of falling well, tubing string near well head will bear larger tensile load because of the increase of own wt, make tubing string be easy to rupture near pithead position, thereby limited the depth of setting of coiled tubing.That is to say, when one timing of coiled tubing intensity, the degree of depth that is lowered to during operation also is limited.Be the coiled tubing of φ 31.8 * 2.77mm such as CT80 grade of steel, specification, SMYS is 552MPa, and minimum tensile strength is 621MPa, and density is 7853kg/m
3, the body yield load is 13403kg.The impact of the factors such as the interior pressure when considering operation, lifting force, and set safe clearance, general maximum is lowered to well depth and is no more than 3800m.When using in greater than 3800 meters deep-well or ultradeep well, its safety can't guarantee.Adopting the high strength coiled tubing is the effective measures that increase depth of implements, but usually also is accompanied by the increase of cost and the reduction of other processing performances.
Summary of the invention
The purpose of this utility model provides a kind of coiled tubing with varying strength section, makes coiled tubing in the situation that external diameter and wall thickness are constant, realizes intensity change in the longitudinal direction, thereby improves depth of implements and the operational security of coiled tubing.
The technical scheme that the utility model is taked is: a kind of coiled tubing with varying strength section is docked from beginning to end by the higher pipeline section of intensity rank and the lower pipeline section of intensity rank at least and forms, and the lower pipeline section external diameter of the higher pipeline section of intensity rank and intensity rank is identical with wall thickness.
Be connected with the pipeline section that intensity rank takes second place between the lower pipeline section of the pipeline section that described intensity rank is higher and intensity rank, and external diameter and the wall thickness of the lower pipeline section of the higher pipeline section of the pipeline section that takes second place of intensity rank and intensity rank and intensity rank are identical.
The along its length gradual change of described coiled tubing intensity, the Strength Changes scope is 483MPa ~ 621MPa, or 552MPa ~ 689MPa, or 621MPa ~ 758MPa.
Described coiled tubing diameter is 25.4mm～88.9mm, and wall thickness is 1.9mm～7.6mm.
The utility model is compared with prior art in the situation that coiled tubing is constant at external diameter and wall thickness, realized the in the longitudinal direction change of intensity, make coiled tubing have in the longitudinal direction the section of a plurality of varying strengths, thereby improve depth of implements and the operational security of coiled tubing.
Description of drawings
Fig. 1 is the utility model structural representation.
The specific embodiment
1 a kind of embodiment of the present utility model is described by reference to the accompanying drawings.
A kind of coiled tubing with varying strength section is formed by the higher pipeline section 1 of intensity rank, pipeline section 3 and the lower pipeline section 2 head and the tail docking of intensity rank that intensity rank takes second place, and lower pipeline section 2 external diameters of the higher pipeline section 1 of intensity rank, pipeline section 3 that intensity rank takes second place and intensity rank are identical with wall thickness.The rest may be inferred extensible is to the design length of coiled tubing.
The along its length gradual change of described coiled tubing intensity, the Strength Changes scope is 483MPa ~ 621MPa, or 552MPa ~ 689MPa, or 621MPa ~ 758MPa.
Described coiled tubing diameter is 25.4mm～88.9mm, and wall thickness is 1.9mm～7.6mm.
Manufacture method: at first with the multistage varying strength wait the butt welding of wall thickness steel band head and the tail to connect after with the design length of steel band spreading to coiled tubing, and described butt weld carried out thermomechanical treatment, make the mechanical property of joint welding and mother metal suitable; Then the steel band with above-mentioned spreading is shaped to the vertical masonry joint tubulose by continuous forming process, and adopts straight seam welding technique to carry out welding fabrication and after heat treatment be wound on the reel, obtains having the coiled tubing of a plurality of varying strength sections.
The utility model is according to the degree of depth of Oil/gas Well with to the requirement of strength of coiled tubing, design coiled tubing intensity distributions along its length, make the coiled tubing near pithead position have higher-strength, and coiled tubing intensity reduces gradually along the well depth direction, under accession reduced cost when well depth, improve the continuous oil pipe operation safety, avoid easily fracture causes the coiled tubing well accident that falls to occur near pithead position.
Claims (4)
1. coiled tubing with varying strength section, it is characterized in that: described coiled tubing is formed by lower pipeline section (2) the head and the tail docking of the higher pipeline section of intensity rank (1) and intensity rank at least, and the higher pipeline section (1) of intensity rank pipeline section (2) external diameter lower with intensity rank is identical with wall thickness.
2. the coiled tubing with varying strength section according to claim 1, it is characterized in that: be connected with the pipeline section (3) that intensity rank takes second place between the lower pipeline section (2) of the pipeline section that described intensity rank is higher (1) and intensity rank, and external diameter and the wall thickness of the lower pipeline section (2) of the pipeline section (3) that takes second place of the intensity rank pipeline section (1) higher with intensity rank and intensity rank are identical.
3. the coiled tubing with varying strength section according to claim 1 and 2, it is characterized in that: the along its length gradual change of described coiled tubing intensity, the Strength Changes scope is 483MPa ~ 621MPa, or 552MPa ~ 689MPa, or 621MPa ~ 758MPa.
4. the coiled tubing with varying strength section according to claim 3, it is characterized in that: described coiled tubing diameter is 25.4mm～88.9mm, wall thickness is 1.9mm～76mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220340482 CN202832276U (en) | 2012-07-13 | 2012-07-13 | Coiled tubing with zones with different intensity |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220340482 CN202832276U (en) | 2012-07-13 | 2012-07-13 | Coiled tubing with zones with different intensity |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202832276U true CN202832276U (en) | 2013-03-27 |
Family
ID=47944008
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220340482 Expired - Fee Related CN202832276U (en) | 2012-07-13 | 2012-07-13 | Coiled tubing with zones with different intensity |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202832276U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103075111A (en) * | 2012-07-13 | 2013-05-01 | 宝鸡石油钢管有限责任公司 | Coiled tubing with different strength sections and manufacturing method thereof |
| CN106062302A (en) * | 2014-04-08 | 2016-10-26 | 哈利伯顿能源服务公司 | Flexible tool housing |
-
2012
- 2012-07-13 CN CN 201220340482 patent/CN202832276U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103075111A (en) * | 2012-07-13 | 2013-05-01 | 宝鸡石油钢管有限责任公司 | Coiled tubing with different strength sections and manufacturing method thereof |
| CN103075111B (en) * | 2012-07-13 | 2015-04-22 | 宝鸡石油钢管有限责任公司 | Coiled tubing with different strength sections and manufacturing method thereof |
| CN106062302A (en) * | 2014-04-08 | 2016-10-26 | 哈利伯顿能源服务公司 | Flexible tool housing |
| US10151154B2 (en) | 2014-04-08 | 2018-12-11 | Halliburton Energy Services, Inc. | Flexible tool housing |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20170605 Address after: 100007 Beijing, Dongzhimen, North Street, No. 9, No. Co-patentee after: Baoji Petroleum Steel Pipe Co., Ltd. Patentee after: China National Petroleum Corporation Address before: 721000, 10 Tan Tan Road, Shaanxi, Baoji Patentee before: Baoji Petroleum Steel Pipe Co., Ltd. |
|
| 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: 20130327 Termination date: 20200713 |