CN103541665B - Casting type oil pumping rod centering device - Google Patents
Casting type oil pumping rod centering device Download PDFInfo
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- CN103541665B CN103541665B CN201310517807.8A CN201310517807A CN103541665B CN 103541665 B CN103541665 B CN 103541665B CN 201310517807 A CN201310517807 A CN 201310517807A CN 103541665 B CN103541665 B CN 103541665B
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- centralizer
- wear
- resistant
- eccentric segment
- centering device
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Abstract
The present invention relates to a kind of casting type oil pumping rod centering device, comprise centralizer body, it is characterized in that: described centralizer body is provided with three eccentric segment wear-resistant blocks along its axis direction, described three eccentric segment wear-resistant blocks along centralizer body axially successively dislocation in 120 degree angles each other, formation original well liquid runner is on average set, be provided with runner interval between described eccentric segment wear-resistant block.Beneficial effect: the wear-resistant cycle of the external arc contact surface of three pieces of eccentric segment wear-resistant blocks is long, weakens the damage to tube inner wall; Fan-shaped wear-resistant block is that centralizer radial circumference 120 degree is evenly distributed, axially misplace design successively, runner area of passage is strengthened, can be widely used in all kinds of oily eccentric wear service shaft; Centralizer termination from end points to wear-resistant block maximum outside diameter is made up of R camber line and the tangent inclined-plane of oblique line, and the sucker rod body of rod corrosion of centralizer termination is alleviated or eliminated in the streamlined anti-eddy current in two ends, anti-choked flow design.
Description
Technical field
The invention belongs to oil pumping rod centering device, particularly relate to a kind of by the casting type oil pumping rod centering device of enhancing nylon injection-molding on sucker rod.
Background technology
In petroleum industry, the oil pumping rod centering device of the supporting eccentric abrasion prevention of pumping rod of well pumping unit has a variety of.Common nylon sucker rod clip centralizer, its fixed structure mutually plugs together interference by upper and lower two panels nylon block to be locked on sucker rod, and the weak point of this series products is: 1. axial locking power does not reach the>=requirement of the industry standard SY/T5832-2009 " oil pumping rod centering device " of 6KN at all; 2., due to the restriction of clip centralizer structure, oil pipe area of passage does not reach required by industry standard SY/T5832-2009 " oil pumping rod centering device " yet: oil pipe area of passage>=1100mm
2; 3. because the locking mechanism of nylon clip centralizer causes the end face at two ends to be plane, when sucker rod pumps, corresponding eddy current and choked flow is produced at the two ends original well liquid (being the oil-water mixture extracted out from underground) of centralizer, cause the sucker rod heavy corrosion at centralizer two ends, in use often cause sucker rod break bar accident occur; Number of patent application 200920095703.1 discloses a kind of clamp type centralizer, comprise centralizer body, centralizer body external surface is longitudinally provided with positioning supports muscle and crosses oil groove, it is characterized in that: centralizer body shape is jujube core shape, and two ends are provided with the channelization angle that angle is 60 ~ 68.This invention adopts upper and lower two pieces of centralizers to form one group, often organizes two pieces of centralizers and is 90 ° and is fixed on sucker rod.The settings mutually in 90 ° of corners of two pieces of centralizers, can not to play point effect to water conservancy diversion to tubing string Central Plains well liquid when reality uses, and its main cause is that the narrow narrow and liquid flow of guiding gutter that two pieces of centralizers are formed is obstructed; The channelization angle that these invention centralizer body two ends are arranged; its end face still remains with plane; find that fluid column is still very large to the shock loading of centralizer end face in actual use; can not complete incidence graph or eliminate fluid column to the corrosion of the centralizer termination sucker rod body of rod, can not play a good protection to sucker rod.
Summary of the invention
The object of the invention is to the deficiency overcoming above-mentioned technology, and provide a kind of by the nylon casting type oil pumping rod centering device of enhancing nylon injection-molding on sucker rod, the wear-resistant cycle of the arc contact surface of three pieces of eccentric segment wear-resistant blocks is long, weakens the damage to tube inner wall; Runner area of passage strengthens; The fusiform anti-eddy current in two ends, centralizer termination and anti-choked flow design, alleviate or eliminate original well liquid post to the corrosion of the centralizer termination sucker rod body of rod.
The present invention for achieving the above object, by the following technical solutions: a kind of casting type oil pumping rod centering device, comprise centralizer body, it is characterized in that: described centralizer body is provided with three eccentric segment wear-resistant blocks along its axis direction, described three eccentric segment wear-resistant blocks along centralizer body axially successively dislocation in 120 degree angles each other, formation original well liquid runner is on average set.
Runner interval is provided with between described eccentric segment wear-resistant block.
The external surface of described eccentric segment wear-resistant block is arc surface.
The shape of cross section at described centralizer body two ends is respectively by being the streamlined centralizer termination of concave to the camber line of axis direction and the tangent transition of oblique line.
Beneficial effect: the wear-resistant cycle of the arc contact surface of three pieces of eccentric segment wear-resistant blocks is long, weakens the damage to tube inner wall; Fan-shaped wear-resistant block is that centralizer radial circumference 120 degree is evenly distributed, axially misplace design successively, runner area of passage is strengthened, can be widely used in all kinds of oily eccentric wear service shaft; Centralizer termination from end points to wear-resistant block maximum outside diameter is made up of R camber line and the tangent inclined-plane of oblique line, the streamlined anti-eddy current in two ends and anti-choked flow design, alleviates or eliminate the sucker rod body of rod corrosion of centralizer termination.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention;
Fig. 2 a-Fig. 2 c is the generalized section that three eccentric segment wear-resistant blocks are arranged on centralizer body;
Fig. 3 is the partial enlarged drawing of centralizer body termination;
Fig. 4 is centralizer original well liquid runner schematic diagram.
In figure: 1, centralizer body, 2, eccentric segment wear-resistant block, 3, runner interval, 4, centralizer termination, 5, original well liquid runner, 6, sucker rod, 7, tube inner wall.
Detailed description of the invention
The specific embodiment of the present invention is described in detail below in conjunction with preferred embodiment.
Refer to accompanying drawing 1-4, the present invention is directed to the defect that prior art exists, according to CNPC's Oilfield Company bidding content, operative norm: SY/T5832-2009 " oil pumping rod centering device "; Q/12DG4827-2013 " oil pumping rod centering device (casting type) " is applicable to the inclined shaft of pumping production, the sucker rod diameter of the eccentric abrasion prevention measure of casing deformation well is: φ 19, φ 22 and pipe aperture are: φ 62mm uses.And provide a kind of by the nylon casting type oil pumping rod centering device of enhancing nylon injection-molding on sucker rod 6, comprise centralizer body 1, described centralizer body is provided with three eccentric segment wear-resistant blocks 2 along its axis direction, described three eccentric segment wear-resistant blocks along centralizer body axially successively dislocation in 120 degree angles each other, formation original well liquid runner 5 is on average set, be provided with runner interval 3 between described eccentric segment wear-resistant block.Runner area of passage is large, and three fan-shaped wear-resistant blocks of centralizer are that centralizer radial circumference 120 degree is evenly distributed, axially misplace design successively, and original well liquid runner makes area of passage obviously increase.Realize internal diameter 62mm oil pipe area of passage 1410mm
2, make the area of passage of centralizer reach 46.70% of the 62mm oil pipe overcurrent gross area, meet the centralizer area of passage>=1100mm in industry standard SY/T5832-2009 " oil pumping rod centering device "
2regulation.As Fig. 4 shows, the centralizer area of passage that original well liquid runner 7 is formed enlarges markedly.
Refer to Fig. 2, preferred version of the present invention is the external surface of described eccentric segment wear-resistant block is arc surface.Three fan-shaped wear-resistant blocks of centralizer, the radial load of tube inner wall 7 can be born respectively, eccentric segment wear-resistant block circular arc external surface contacts the rubbing surface formed with tube inner wall, its circular arc area is large, contact surface uniform force, therefore born pressure is less, can extend the effective time in oil well eccentric wear cycle and increase centralizer application life, and arc-shaped surface contact there will not be the centralizer friction scar of tube inner wall.
Refer to Fig. 3, preferred version of the present invention is that the shape of cross section at described centralizer body two ends is respectively by being the streamlined centralizer termination 4 of concave to the camber line of axis direction and the tangent transition of oblique line.The two ends of centralizer from sucker rod external diameter gradually to the indent camber line in fan-shaped wear-resistant block direction, for streamlined anti-eddy current and anti-choked flow design, namely centralizer termination is without end face, form streamlined by R camber line and the tangent inclined-plane of oblique line from end points to centralizer maximum outside diameter, original well liquid flow resistance can be made to reduce, reduce choked flow and eddy current that centralizer produces in the process of pumping, and alleviate or eliminate the corrosion phenomenon of original well liquid post to centralizer termination body of rod sucker rod.
The above is only preferred embodiment of the present invention, not does any pro forma restriction to structure of the present invention.Every above embodiment is done according to technical spirit of the present invention any simple modification, equivalent variations and modification, all still belong in the scope of technical scheme of the present invention.
Claims (3)
1. a casting type oil pumping rod centering device, comprise centralizer body, it is characterized in that: described centralizer body is provided with three eccentric segment wear-resistant blocks along its axis direction, described three eccentric segment wear-resistant blocks along centralizer body axially successively dislocation in 120 degree angles each other, formation original well liquid runner is on average set; The section shape of the termination at described centralizer body two ends is respectively by being that concave is streamlined to the camber line of axis direction and the tangent transition of oblique line.
2. casting type oil pumping rod centering device according to claim 1, is characterized in that: be provided with runner interval between described eccentric segment wear-resistant block.
3. casting type oil pumping rod centering device according to claim 2, is characterized in that: the external surface of described eccentric segment wear-resistant block is arc surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310517807.8A CN103541665B (en) | 2013-10-28 | 2013-10-28 | Casting type oil pumping rod centering device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310517807.8A CN103541665B (en) | 2013-10-28 | 2013-10-28 | Casting type oil pumping rod centering device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103541665A CN103541665A (en) | 2014-01-29 |
| CN103541665B true CN103541665B (en) | 2015-12-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310517807.8A Expired - Fee Related CN103541665B (en) | 2013-10-28 | 2013-10-28 | Casting type oil pumping rod centering device |
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| CN (1) | CN103541665B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104047561B (en) * | 2014-06-20 | 2016-09-21 | 中国地质大学（武汉） | Wireline Coring Off-Axis Anti-deviation Combined Drilling Tool |
| CN112211570B (en) * | 2020-10-14 | 2023-01-24 | 中油智科(吉林)技术装备有限公司 | Centralizer and preparation method thereof |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1512152A4 (en) * | 2002-05-17 | 2006-03-08 | Halliburton Energy Serv Inc | Method and apparatus for mwd formation testing |
| CN2637704Y (en) * | 2003-08-21 | 2004-09-01 | 曾正伟 | Tapered thread short contact strengthening apparatus |
| RU2312970C1 (en) * | 2006-12-06 | 2007-12-20 | Открытое акционерное общество "Татнефть" им. В.Д. Шашина | Device for sucker rod operation in well |
| CN201386517Y (en) * | 2009-02-27 | 2010-01-20 | 天津市青石科贸有限公司 | Clamp type centralizer |
| CN202970525U (en) * | 2012-11-28 | 2013-06-05 | 中国石油集团川庆钻探工程有限公司 | Centralizer structure of screw drilling tool |
| CN203626634U (en) * | 2013-10-28 | 2014-06-04 | 天津市伯乔工贸有限公司 | Casting type sucker rod centralizer |
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| CN103541665A (en) | 2014-01-29 |
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Granted publication date: 20151223 Termination date: 20211028 |
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| CF01 | Termination of patent right due to non-payment of annual fee |