CN108612487B - Self-rotating centralizer - Google Patents
Self-rotating centralizer Download PDFInfo
- Publication number
- CN108612487B CN108612487B CN201611138547.3A CN201611138547A CN108612487B CN 108612487 B CN108612487 B CN 108612487B CN 201611138547 A CN201611138547 A CN 201611138547A CN 108612487 B CN108612487 B CN 108612487B
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- China
- Prior art keywords
- sleeve
- self
- inner sleeve
- diameter
- rotating
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- 239000003921 oil Substances 0.000 description 10
- 239000010779 crude oil Substances 0.000 description 5
- 238000010586 diagram Methods 0.000 description 2
- 239000003129 oil well Substances 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000003116 impacting effect Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
- E21B17/10—Wear protectors; Centralising devices, e.g. stabilisers
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Earth Drilling (AREA)
Abstract
The invention discloses a self-rotating centralizer, which comprises a central rod and a centralizing sleeve, wherein the centralizing sleeve is freely and rotatably sleeved on the central rod and comprises an inner sleeve, an outer sleeve and blades, the inner sleeve is sleeved on the central rod, a plurality of uniformly arranged blades which can enable the inner sleeve to rotate due to an axially flowing medium are arranged on the outer cylindrical surface of the inner sleeve, the outer sleeve is sleeved on the inner sleeve, and the blades are arranged between the outer sleeve and the inner sleeve. The invention aims to provide a self-rotating centralizer for preventing eccentric wear.
Description
Technical Field
The invention relates to the field of centralizers, in particular to a self-rotating centralizer applied to an oil field.
Background
The common centralizer used in the oil well can extrude a centralizing sleeve of the centralizer on the wall of an oil pipe due to eccentric wear of an oil pumping rod, so that a groove is ground on the oil pipe due to the eccentric wear of the centralizing sleeve in the long-term use process, and sometimes, an oil well pump is clamped due to breakage of a pin shaft, so that the oil pumping equipment and the oil pipe are damaged, and the stability and the benefit of operation can not be ensured.
Disclosure of Invention
In view of the above problems, it is an object of the present invention to provide a self-rotating centralizer for preventing eccentric wear.
The invention is realized by the following technical scheme:
the self-rotating centralizer comprises a central rod and a centralizing sleeve, wherein the centralizing sleeve is freely and rotatably sleeved on the central rod and comprises an inner sleeve, an outer sleeve and blades, the inner sleeve is sleeved on the central rod, a plurality of uniformly arranged blades capable of enabling the inner sleeve to rotate due to an axially flowing medium are arranged on the outer cylindrical surface of the inner sleeve, the outer sleeve is sleeved on the inner sleeve, and the blades are arranged between the outer sleeve and the inner sleeve.
According to the self-rotating centralizer, the outer cylindrical surface of the outer cylinder is provided with a plurality of uniformly arranged through holes, and the diameter of each through hole is 4-10 mm.
The self-rotating centralizer is characterized in that convex shoulders are arranged on shafts at two ends of the centralizing sleeve, the outer diameter of each convex shoulder is smaller than the inner diameter of the outer cylinder, and a groove is formed in the side wall, close to the centralizing sleeve, of each convex shoulder.
According to the self-rotating centralizer, the diameter of the through hole in the outer cylinder is 6-8 mm.
According to the self-rotating centralizer, the outer diameter of the shoulder is 0.8 times of the inner diameter of the outer cylinder.
The invention has the beneficial effects that:
can flow in the blade in the cover of righting through crude oil to drive the cover of righting and rotate, thereby avoid the production of eccentric wear, and the recess that is equipped with on the shoulder can make the medium that flows through the blade pass through the recess backward flow, thereby slows down the cover of righting.
Drawings
FIG. 1 is a block diagram of a self-rotating centralizer;
figure 2 is a block diagram of a centralizing sleeve.
The labels in the figure are: 1 is a central rod, 2 is a centralizing sleeve, 3 is a blade, 4 is an inner sleeve, 5 is an outer cylinder, 6 is a through hole, and 7 is a groove.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings.
The self-rotating centralizer shown in fig. 1 and 2 comprises a central rod 1 and a centralizing sleeve 2, wherein the centralizing sleeve 2 is freely and rotatably sleeved on the central rod 1, the centralizing sleeve 2 comprises an inner sleeve 4, an outer sleeve 5 and blades 3, the inner sleeve 4 is sleeved on the central rod 1, a plurality of uniformly arranged blades 3 which can enable the inner sleeve to rotate are arranged on the outer cylindrical surface of the inner sleeve 4 in an axial flowing mode, the outer sleeve 5 is sleeved outside the inner sleeve 4, and the blades 3 are arranged between the outer sleeve 5 and the inner sleeve 4.
The outer cylindrical surface of the outer barrel 5 is provided with a plurality of uniformly arranged through holes 6, the diameter of each through hole is 4-10 mm, 6-8 mm can be achieved, and 6mm is best. The through hole 6 is arranged, so that crude oil can overflow from the through hole 6 and flow between the outer cylinder and the oil pipe to lubricate the outer cylinder and the oil pipe.
And convex shoulders are arranged on shafts at two ends of the centering sleeve 2, the outer diameter of each convex shoulder is smaller than the inner diameter of the outer cylinder 5, and a groove 7 is formed in the side wall of each convex shoulder close to the centering sleeve 2, so that crude oil can form backflow after impacting the groove 7, and the centering sleeve is decelerated. The outer diameter of the convex shoulder is 0.8 times of the inner diameter of the outer cylinder 5, and the outer diameter of the convex shoulder is 0.8 times of the inner diameter of the outer cylinder 5, so that crude oil can flow into the outer cylinder 5 in a large flow area, part of the crude oil can flow back under the action of the groove 7, and the centralizing sleeve can be decelerated. The self-rotating centering sleeve can avoid eccentric wear on the oil pipe, so that the oil pipe is higher in durability.
Claims (4)
1. A self-rotating centralizer is characterized by comprising a central rod (1) and a centralizing sleeve (2), wherein the centralizing sleeve (2) is freely rotatably sleeved on the central rod (1), the centralizing sleeve (2) comprises an inner sleeve (4), an outer sleeve (5) and blades (3), the inner sleeve (4) is sleeved on the central rod (1), a plurality of uniformly arranged blades (3) which can enable the inner sleeve to rotate due to an axially flowing medium are arranged on the outer cylindrical surface of the inner sleeve (4), the outer sleeve (5) is sleeved outside the inner sleeve (4), and the blades (3) are arranged between the outer sleeve (5) and the inner sleeve (4); and convex shoulders are arranged on shafts at two ends of the centering sleeve (2), the outer diameter of each convex shoulder is smaller than the inner diameter of the outer cylinder (5), and a groove (7) is arranged on the side wall of each convex shoulder close to the centering sleeve (2).
2. A self-rotating centraliser according to claim 1, wherein the outer cylindrical surface of the outer cylinder (5) is provided with a plurality of evenly arranged through holes (6) having a diameter of 4-10 mm.
3. A self-rotating centraliser according to claim 2, wherein the diameter of the through-hole in the outer barrel (5) is 6-8 mm.
4. A self-rotating centraliser according to claim 2, wherein the outer diameter of the shoulder is 0.8 times the inner diameter of the outer barrel (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611138547.3A CN108612487B (en) | 2016-12-12 | 2016-12-12 | Self-rotating centralizer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611138547.3A CN108612487B (en) | 2016-12-12 | 2016-12-12 | Self-rotating centralizer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108612487A CN108612487A (en) | 2018-10-02 |
| CN108612487B true CN108612487B (en) | 2021-03-19 |
Family
ID=63643268
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611138547.3A Active CN108612487B (en) | 2016-12-12 | 2016-12-12 | Self-rotating centralizer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108612487B (en) |
Family Cites Families (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1460632A (en) * | 1922-06-28 | 1923-07-03 | Wilson B Wigle | Centering cementing shoe |
| US1767198A (en) * | 1928-01-31 | 1930-06-24 | Baker Oil Tools Inc | Well-casing-centering device |
| CN2503195Y (en) * | 2001-08-09 | 2002-07-31 | 樊玉兰 | Centering sucker rod |
| CN2570438Y (en) * | 2002-09-09 | 2003-09-03 | 李德全 | Multiple function pumping rod |
| CN2685538Y (en) * | 2004-02-11 | 2005-03-16 | 鲁广立 | Rotary moving sucker rod centralising device |
| CN2799838Y (en) * | 2005-05-31 | 2006-07-26 | 中国石化集团胜利石油管理局总机械厂 | Screw type pumping rod centralizer |
| CN2937446Y (en) * | 2006-01-18 | 2007-08-22 | 山东九环石油机械有限公司 | Spacing rotation centering wax scraper |
| CN200961449Y (en) * | 2006-10-20 | 2007-10-17 | 赵科昌 | Oil sucking rod for resisting eccentric wear |
| CN201196033Y (en) * | 2008-05-22 | 2009-02-18 | 黄石市新科石油机械配件厂 | Self-rotating bias wearing-proof centralizer |
| CN101581203A (en) * | 2009-06-19 | 2009-11-18 | 中国海洋石油总公司 | Near-bit centralizer of riser pipe under simulated injection method |
| CN202202822U (en) * | 2011-09-08 | 2012-04-25 | 东北石油大学 | Torque-reducing connector for a drill rod |
| CN202401987U (en) * | 2011-12-02 | 2012-08-29 | 辽宁跨克石油装备有限公司 | Integral sliding-bush type sucker rod wear-resistant centralizer |
| CN204571869U (en) * | 2015-02-03 | 2015-08-19 | 李德全 | A kind of anticreep eccentric abrasion prevention paraffin cutting oil pumping rod centering device |
| CN205778580U (en) * | 2016-06-24 | 2016-12-07 | 中国石油天然气股份有限公司 | Sucker rod |
-
2016
- 2016-12-12 CN CN201611138547.3A patent/CN108612487B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN108612487A (en) | 2018-10-02 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20210506 Address after: 163000 No.4, Beiyi Road, Huoju village, Saertu District, Daqing City, Heilongjiang Province Patentee after: DALIAN SHENGWEI MACHINERY MANUFACTURING Co.,Ltd. Address before: 618000 Deyang High-tech Industrial Park, Sichuan Province, northeast corner of the intersection of Yinhe Road and Second Ring Road Patentee before: SICHUAN YUTIAN PETROLEUM MACHINERY EQUIPMENT Co.,Ltd. |
|
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20240607 Address after: 062450 the southern side of Cangbao Road, Yulin village, Xingcun village, Hejian City, Cangzhou, Hebei, China Patentee after: Hejian Huidong drilling Parts Co.,Ltd. Country or region after: China Address before: 163000 No.4, Beiyi Road, Huoju village, Saertu District, Daqing City, Heilongjiang Province Patentee before: DALIAN SHENGWEI MACHINERY MANUFACTURING Co.,Ltd. Country or region before: China |