CN109736725A - Low-resistance rotary centralizer for workover operation - Google Patents
Low-resistance rotary centralizer for workover operation Download PDFInfo
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- CN109736725A CN109736725A CN201811508976.4A CN201811508976A CN109736725A CN 109736725 A CN109736725 A CN 109736725A CN 201811508976 A CN201811508976 A CN 201811508976A CN 109736725 A CN109736725 A CN 109736725A
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- main body
- resistance
- rotation
- top connection
- lower contact
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- 238000005728 strengthening Methods 0.000 claims description 17
- 238000010276 construction Methods 0.000 abstract description 6
- 238000000034 method Methods 0.000 abstract description 2
- 238000005299 abrasion Methods 0.000 abstract 1
- 238000000605 extraction Methods 0.000 abstract 1
- 239000003129 oil well Substances 0.000 abstract 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
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Abstract
The invention relates to the technical field of oil extraction engineering, and belongs to a low-resistance rotary centralizer for workover treatment. The problems of large friction resistance, quick abrasion and poor stability caused by rotation of the well inner tubular column in the construction process of the underground workover operation of the oil well and the water well are solved. The anti-rotation spring is composed of an upper joint (1), a hoop (2), a righting piece (3), a spring piece (4), a main body (5), a thrust bearing (6), an anti-rotation pin (7) and a lower joint (8); the anti-rotation sleeve is characterized in that an upper connector (1) is in threaded connection with a lower connector (8), the upper connector (1) is fixed with an anti-rotation pin (7) of the lower connector (8), a spring piece (4) is installed between a main body (5) and a righting piece (3), and the righting piece (3) is connected with the main body (5) through a hoop (2) from top to bottom.
Description
Technical field
The present invention relates to technical field of oil production engineering, belong to a kind of lower resistance rotary centralizer for workover treatment.
Background technique
During the Downhole Constructions such as oil, well well workover, it is often necessary to rotary operation tubing string, since tubing string diameter is small
It plays pendulum in casing inner diameter, tubing string rotary course, in order to keep tubing string steady during Downhole Construction
The control of qualitative and tubing string end direction need to install erection device in tubing string end.
Currently, common centralizer is ball type centralizer, there are stability in rotary course poor and wall friction resistance
Greatly, the problems such as ball is easily stuck, not only service life is short, but also reduces construction efficiency.
Summary of the invention
Preferable righting effect is provided the purpose of the present invention is design can not only be close to casing wall, but also can be relative to casing
Stablize rotation and a kind of low lower resistance rotary centralizer for workover treatment for being not easy sand card of frictional resistance.
The present invention is achieved through the following technical solutions:
A kind of lower resistance rotary centralizer for workover treatment, it by top connection, garter spring, body resistance-strengthening tablets, spring leaf, main body, push away
Power bearing, anti-rotation pin, lower contact composition；Wherein top connection is threadedly coupled with lower contact, top connection and lower contact anti-rotation pin
It is fixed, it is connect with top connection by thrust bearing at main body upper end step, with lower contact upper end by pushing away at lower body step
The connection of power bearing, spring leaf are mounted between main body and body resistance-strengthening tablets, and body resistance-strengthening tablets and main body are connected down through garter spring.
Body outer wall is provided with groove, and body resistance-strengthening tablets and spring leaf are mounted in the groove of body outer wall.
The lower resistance rotary centralizer body resistance-strengthening tablets and spring leaf to contract and can be sprung back, and top connection and lower contact can
It is rotated in body interior.
Compared with the prior art the present invention has the advantages that
The configuration of the present invention is simple, reliable operation, long service life, are designed using double-layer structure, and outer layer righting structure is shrinkable time
For bullet to adapt to casing inner diameter variation, internal layer is rotatable.It solves the problems, such as that tubing string stablizes righting and the rotation of tubing string lower resistance simultaneously, closes
The purpose that the realization tubing string of reason rotates smoothly in pit shaft.
Detailed description of the invention: Fig. 1 is the structural diagram of the invention；
It is connect under 1- top connection, 2- garter spring, 3- body resistance-strengthening tablets, 4- spring leaf, 5- main body, 6- thrust bearing, 7- anti-rotation pin, 8- in figure
Head, 9- groove.
Specific embodiment: the present invention will be further explained below with reference to the attached drawings:
Lower resistance rotary centralizer for workover treatment is by top connection 1, garter spring 2, body resistance-strengthening tablets 3, spring leaf 4, main body 5, thrust
Bearing 6, anti-rotation pin 7, lower contact 8 form；Wherein top connection 1 is threadedly coupled with lower contact 8, top connection 1 and 8 anti-rotation of lower contact
Pin 7 is fixed, is connect with top connection 1 by thrust bearing 6 at 5 upper end step of main body, at 5 lower end step of main body and lower contact 8
Upper end is connected by thrust bearing 6, and spring leaf 4 is mounted between main body 5 and body resistance-strengthening tablets 3, body resistance-strengthening tablets 3 and main body 5 down through
Garter spring 2 connects.
5 outer wall of main body of lower resistance rotary centralizer for workover treatment is provided with groove 9, and body resistance-strengthening tablets 3 and spring leaf 4 are pacified
In the groove 9 of 5 outer wall of main body.
The body resistance-strengthening tablets 3 and spring leaf 4 of lower resistance rotary centralizer for workover treatment to contract and can be sprung back.
The top connection 1 and lower contact 8 of lower resistance rotary centralizer for workover treatment can be in 5 internal rotatings of main body.
Scene in use, top connection 1 and lower contact 8 of the invention are connect with Downhole Construction tubing string respectively first,
Then the present invention with tubing string from well head tripping in, because 3 outer diameter of body resistance-strengthening tablets of free state is greater than the casing inner diameter of operation well, thus under
Body resistance-strengthening tablets 3 and spring leaf 4 are because being pressed against contract by internal surface of sleeve pipe during entering.After the present invention is completely into casing, righting
Piece 3 is acted on by 4 bounce of spring leaf, is close to internal surface of sleeve pipe, is played the role of righting tubing string.
When tubing string rotation, top tubing string of the invention drives top connection 1 to rotate, and top connection 1 is connected through a screw thread and prevents
Nail 7 of shipping and reselling on another market drives lower contact 8 to rotate, and lower contact 8 drives lower part tubing string of the invention to rotate, and top connection 1 is with lower contact 8 by pushing away
Power bearing 6 is rotated relative to main body 5, and the static friction of rotation is become rolling friction by thrust bearing 6, reduction when reaching tubing string rotation
The purpose of frictional resistance.
After completing Downhole Construction, the present invention is risen with tubing string to ground, it is reusable after disassembly.
Claims (4)
1. a kind of lower resistance rotary centralizer for workover treatment, it is characterised in that: it by top connection (1), garter spring (2), help
Positive (3), spring leaf (4), main body (5), thrust bearing (6), anti-rotation pin (7), lower contact (8) composition；Wherein top connection (1)
Be threadedly coupled with lower contact (8), top connection (1) and lower contact (8) anti-rotation pin (7) are fixed, at main body (5) upper end step with it is upper
Connector (1) is connected by thrust bearing (6), is connected with lower contact (8) upper end by thrust bearing (6) at the step of main body (5) lower end
It connects, spring leaf (4) is mounted between main body (5) and body resistance-strengthening tablets (3), and body resistance-strengthening tablets (3) and main body (5) connect down through garter spring (2)
It connects.
2. a kind of lower resistance rotary centralizer for workover treatment according to claim 1, it is characterised in that: main body
(5) outer wall is provided with groove (9), and body resistance-strengthening tablets (3) and spring leaf (4) are mounted in the groove (9) of main body (5) outer wall.
3. a kind of lower resistance rotary centralizer for workover treatment according to claim 1, it is characterised in that: body resistance-strengthening tablets
(3) it to contract and can be sprung back with spring leaf (4).
4. a kind of lower resistance rotary centralizer for workover treatment according to claim 1, it is characterised in that: top connection
(1) and lower contact (8) can be in main body (5) internal rotating.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811508976.4A CN109736725A (en) | 2018-12-11 | 2018-12-11 | Low-resistance rotary centralizer for workover operation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811508976.4A CN109736725A (en) | 2018-12-11 | 2018-12-11 | Low-resistance rotary centralizer for workover operation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109736725A true CN109736725A (en) | 2019-05-10 |
Family
ID=66358775
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811508976.4A Pending CN109736725A (en) | 2018-12-11 | 2018-12-11 | Low-resistance rotary centralizer for workover operation |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109736725A (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201202418Y (en) * | 2008-06-17 | 2009-03-04 | 中国石油化工股份有限公司江苏油田分公司石油工程技术研究院 | Self-locking type hydraulic casing tube centralizer |
| RU2411340C1 (en) * | 2009-09-11 | 2011-02-10 | Открытое акционерное общество "Татнефть" им. В.Д. Шашина | Centraliser for split hole reamer |
| CN201943608U (en) * | 2010-12-17 | 2011-08-24 | 中国石油天然气集团公司 | Excessively-moved pipe centering device |
| CN203655177U (en) * | 2013-12-17 | 2014-06-18 | 南车戚墅堰机车车辆工艺研究所有限公司 | Machine liquid type diameter-variable stabilizer |
| CN105221072A (en) * | 2015-10-30 | 2016-01-06 | 中国海洋石油总公司 | A kind of construction operation tubing string being applied to petroleum gas engineering |
| CN205714023U (en) * | 2016-06-30 | 2016-11-23 | 中国石油集团西部钻探工程有限公司 | Rotatable rigid centralizer |
| US20160348473A1 (en) * | 2015-05-27 | 2016-12-01 | Odfjell Partners Invest Ltd | Downhole Milling Tool |
| CN207568510U (en) * | 2017-10-30 | 2018-07-03 | 中国石油天然气股份有限公司 | Centering guide for ball throwing separate injection |
-
2018
- 2018-12-11 CN CN201811508976.4A patent/CN109736725A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201202418Y (en) * | 2008-06-17 | 2009-03-04 | 中国石油化工股份有限公司江苏油田分公司石油工程技术研究院 | Self-locking type hydraulic casing tube centralizer |
| RU2411340C1 (en) * | 2009-09-11 | 2011-02-10 | Открытое акционерное общество "Татнефть" им. В.Д. Шашина | Centraliser for split hole reamer |
| CN201943608U (en) * | 2010-12-17 | 2011-08-24 | 中国石油天然气集团公司 | Excessively-moved pipe centering device |
| CN203655177U (en) * | 2013-12-17 | 2014-06-18 | 南车戚墅堰机车车辆工艺研究所有限公司 | Machine liquid type diameter-variable stabilizer |
| US20160348473A1 (en) * | 2015-05-27 | 2016-12-01 | Odfjell Partners Invest Ltd | Downhole Milling Tool |
| CN105221072A (en) * | 2015-10-30 | 2016-01-06 | 中国海洋石油总公司 | A kind of construction operation tubing string being applied to petroleum gas engineering |
| CN205714023U (en) * | 2016-06-30 | 2016-11-23 | 中国石油集团西部钻探工程有限公司 | Rotatable rigid centralizer |
| CN207568510U (en) * | 2017-10-30 | 2018-07-03 | 中国石油天然气股份有限公司 | Centering guide for ball throwing separate injection |
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|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20190510 |