CN201241633Y - Rotary centralizer - Google Patents
Rotary centralizer Download PDFInfo
- Publication number
- CN201241633Y CN201241633Y CNU2008201095704U CN200820109570U CN201241633Y CN 201241633 Y CN201241633 Y CN 201241633Y CN U2008201095704 U CNU2008201095704 U CN U2008201095704U CN 200820109570 U CN200820109570 U CN 200820109570U CN 201241633 Y CN201241633 Y CN 201241633Y
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- China
- Prior art keywords
- centralizer
- cannelure
- rotation
- gland
- rotating
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Abstract
Disclosed is a rotating centralizer, which is used to overcome shortages that the bearing of the existing rotating stabilizer is easy to be damaged, which leads the centralizer not to be capable of rotating according to the design requirement, and causes abnormal construction operations. The rotating centralizer comprises a body (1) and a centralizer (3), the surface of the centralizer (3) is provided with a spiral vane (8), the centralizer (3) is axially located on the body (1) through a gland bush (2), the gland bush (2) is fixedly connected with the body (1), a sealing ring (7) is mounted between the centralizer (3) and the body (1), a ring-shaped groove (9) is arranged on the excircle surface of the body (1) on which the centralizer (3) is mounted, and a steel ball (6) which is located in the ring-shaped groove (9) is mounted on the centralizer (3) corresponding to the ring-shaped groove (9) on the body (1). The utility model has the advantages that the centralizer with the spiral vane can rotate to effectively clear miscellanies in well barrels of horizontal wells, side tracking wells and screen-pipe completion wells, thereby reducing drilling resistance of pipe columns, and increasing one-step drilling success ratio of the pipe columns.
Description
Affiliated technical field
The utility model relates to directional well in a kind of petroleum exploration and development, sidetracked hole construction operation centralizer, particularly relates to a kind of rotation centralizer.
Background technology
Along with the continuous development of drilling technology, directed drilling, sidetracked hole technology are used widely.When the horizontal well completion operation, the downhole tool tubing string is except passing through the flex socket of angle buildup interval, when entering horizontal bare hole well Duan Shihui, instrument runs into very big frictional resistance, having accumulated in reservoir sand in the well and rock fragment will make tubing string be lowered to resistance further to increase, when resistance is excessive, tubing string is lowered to operation and will be forced to stop, usually tubing string need be risen out and carry out the drifting operation, perhaps shorten completion length, finish construction operation in advance, bring unnecessary loss for the horizontal well oil and gas development.
2006 disclosed Chinese utility model patent on December 27, " rotating stabilize " (CN2851518Y), be mainly used in the drillng operation of extended reach well, high-inclination directional well, horizontal well.This rotating stabilize is made up of body, hold-down screw, seal cover, sealing ring, bearing and centralizer, centralizer relies on the bearing rotation, can reduce the centralizer of conventional stabilisers and the moment of torsion that the stratum friction is produced, but because the suffered power of drill string is very complicated during operation, bearing wherein is easy to damage, centralizer can not be rotated by designing requirement, cause construction operation normally not carry out.
The utility model content
Damage easily in order to overcome existing rotating stabilize middle (center) bearing, centralizer can not be rotated by designing requirement, the deficiency that causes construction operation normally not carry out, the utility model provide a kind of can satisfy the rotation centralizer that the horizontal well completion operation is lowered to the tool tubular column needs.
The technical scheme that its technical problem that solves the utility model adopts is: the rotation centralizer comprises body, centralizer, centralizer passes through the gland axial location on body, gland is fixedlyed connected with body, centralizer and body are matched in clearance, between centralizer and the body sealing ring is installed, centralizer is the axle rotation with the body; The fin on centralizer surface is a screw type; The outer round surface that centralizer is installed at body has cannelure, and the quantity of cannelure is at least 2, and cannelure is positioned at the fin both ends of centralizer, and the bottom of cannelure is a circular arc; With on the centralizer of cannelure correspondence position on the body steel ball is installed and is positioned at cannelure; Steel ball is installed in the radial direction through hole of centralizer upper panel, and the outer end of radial direction through hole is installed with the top bolt on the fin.
The beneficial effects of the utility model are, rational in infrastructure, processing and manufacturing is simple, is convenient to assembling, good sealing effect, steel ball is not easy to damage, in horizontal well, sidetracked hole sieve tube completion, when tubing string was lowered to the bore hole section and is hampered power, the foreign material in the pit shaft can be effectively removed in the rotation that has a helical form fin centralizer, reduce tubing string and be lowered to resistance, improve one time the running string success rate.
Description of drawings
Fig. 1 is the utility model rotation centralizer structure schematic diagram.
Fig. 2 is the B-B sectional drawing of Fig. 1.
Fig. 3 is the C-C sectional drawing of Fig. 1.
Among the figure: 1. body, 2. gland, 3. centralizer, 4. jackscrew, 5. top bolt, 6. steel ball, 7. sealing ring, 8. fin, 9. cannelure.
The specific embodiment
The utility model is described in further detail below in conjunction with drawings and Examples.
The utility model rotation centralizer comprises body 1, centralizer 3, and the fin 8 on centralizer 3 surfaces is a screw type, and centralizer 3 is installed on the cylindrical of body 1, and is gapped between centralizer 3 endoporus and body 1 cylindrical.The outer round surface that body 1 is installed centralizer 3 has cannelure 9, has at least 2 cannelures 9 to lay respectively at the two ends of centralizer 3; The bottom of cannelure 9 is a circular arc; With on the centralizer 3 of cannelure 9 correspondence positions on the body 1 steel ball 6 is installed and is positioned at cannelure 9.Because the fin 8 on the centralizer 3 is thicker, steel ball 6 is installed on the fin 8 usually; Be drilled with radial direction through hole on fin 8, steel ball 6 is installed in the radial direction through hole, and the outer end of radial direction through hole is installed with top bolt 5 in order to stationary balls 6; For the ease of adjusting the radial position of steel ball 6 in through hole, top bolt 5 can be threaded with the radial direction through hole of fin 8 and adjust, can adopt welding procedure that top bolt 5 is fixed on the fin 8 when suitable size is adjusted in the gap, the position of avoiding rotating steel ball 6 in the centralizer lower going-into-well changes.Usually on the centralizer 3 3～5 fins 8 are arranged, best in the two ends of 3 fins 8 installation steel ball 6 effects at least.
On body 1, fixedly connected with body 1 by the two ends that gland 2 is positioned at centralizer 3 by gland 2 axial location for the centralizer 3 of the utility model rotation centralizer, all gapped between gland 2 and centralizer 3 are axial, between radially; Usually gland 2 adopts with body 1 and is threaded, be convenient to gland 2 and centralizer 3 axially between the adjustment in gap, after the gap adjustment is suitable, by the radial direction top thread 4 on the gland 2 gland 2 and body 1 are fixed again.Between centralizer 3 and the body 1 sealing ring 7 is installed, can prevents effectively that down-hole liquid and foreign matter from entering in the gap between body 1 and the centralizer 3, the phenomenon of avoiding damages such as steel ball 6 and cannelure 9 to cause that centralizer 3 can not rotate occurs.
The utility model rotation centralizer structure is reasonable, processing and manufacturing is simple, is convenient to assembling, good sealing effect, steel ball is not easy to damage, except that having common centralizer down-hole string is supported, the function placed in the middle, having increased the rotation that is hampered and having dialled the thing function, in the construction of horizontal well sieve tube completion, when being lowered to tubing string and being hampered, centralizer can rotate, and rock chip and loose material that the helical form fin in the rotation will hinder in the tubing string lower going-into-well are pushed aside, improves tubing string and is lowered to ability.
The utility model rotation centralizer is not only applicable to the horizontal well completion operation, is applicable to that the tubing string of other well type is lowered to operation yet.
Claims (5)
1. rotation centralizer, comprise body, centralizer, centralizer passes through the gland axial location on body, gland is fixedlyed connected with body, centralizer and body are matched in clearance, between centralizer and the body sealing ring is installed, centralizer is the axle rotation with the body, it is characterized in that: the fin (8) on centralizer (3) surface is screw type; The outer round surface that centralizer (3) is installed at body (1) has cannelure (9); Go up with body (1) and on the centralizer (3) of cannelure (9) correspondence position steel ball (6) to be installed and to be positioned at cannelure (9).
2. rotation centralizer according to claim 1 is characterized in that: described steel ball (6) is installed in the radial direction through hole of centralizer (3) upper panel (8), and the outer end that fin (8) is gone up radial direction through hole is installed with top bolt (5).
3. rotation centralizer according to claim 2 is characterized in that: the quantity of described cannelure (9) is at least 2, and the bottom of cannelure (9) is a circular arc.
4. rotation centralizer according to claim 3 is characterized in that: described cannelure (9) is positioned at fin (8) both ends of centralizer (3).
5. rotation centralizer according to claim 4 is characterized in that: described gland (2) is threaded with body (1), gland (2) and centralizer (3) axially between, gapped between radially; Described gland (2) radially is equipped with jackscrew (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201095704U CN201241633Y (en) | 2008-07-31 | 2008-07-31 | Rotary centralizer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201095704U CN201241633Y (en) | 2008-07-31 | 2008-07-31 | Rotary centralizer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201241633Y true CN201241633Y (en) | 2009-05-20 |
Family
ID=40714929
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008201095704U Expired - Fee Related CN201241633Y (en) | 2008-07-31 | 2008-07-31 | Rotary centralizer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201241633Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103321594A (en) * | 2013-06-27 | 2013-09-25 | 中国海洋石油总公司 | Closed spiral wing anti-balling centralizer for well drilling |
| CN106285512A (en) * | 2016-10-10 | 2017-01-04 | 贵州高峰石油机械股份有限公司 | A kind of eccentric centralizer and using method thereof |
| CN113107390A (en) * | 2021-04-22 | 2021-07-13 | 中铁二院工程集团有限责任公司 | Drill rod centralizing ring and drilling device for horizontal drilling |
-
2008
- 2008-07-31 CN CNU2008201095704U patent/CN201241633Y/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103321594A (en) * | 2013-06-27 | 2013-09-25 | 中国海洋石油总公司 | Closed spiral wing anti-balling centralizer for well drilling |
| CN103321594B (en) * | 2013-06-27 | 2015-11-04 | 中国海洋石油总公司 | The drilling well anti-mud drum centralizer of closed screw wing |
| CN106285512A (en) * | 2016-10-10 | 2017-01-04 | 贵州高峰石油机械股份有限公司 | A kind of eccentric centralizer and using method thereof |
| CN106285512B (en) * | 2016-10-10 | 2018-10-30 | 贵州高峰石油机械股份有限公司 | A kind of bias centralizer and its application method |
| CN113107390A (en) * | 2021-04-22 | 2021-07-13 | 中铁二院工程集团有限责任公司 | Drill rod centralizing ring and drilling device for horizontal drilling |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090520 Termination date: 20150731 |
|
| EXPY | Termination of patent right or utility model |