CN105696949A - Moving type rotary centering guide - Google Patents
Moving type rotary centering guide Download PDFInfo
- Publication number
- CN105696949A CN105696949A CN201410685350.6A CN201410685350A CN105696949A CN 105696949 A CN105696949 A CN 105696949A CN 201410685350 A CN201410685350 A CN 201410685350A CN 105696949 A CN105696949 A CN 105696949A
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- CN
- China
- Prior art keywords
- movable rotary
- wiper block
- type rotary
- centering
- rotary centralizer
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Abstract
The invention provides a moving type rotary centering guide, and belongs to the field of exploration drilling. The moving type rotary centering guide comprises at least two centering blocks, wherein the centering blocks are sequentially connected to define a cylindrical structure; longitudinal discharge grooves parallel to the axial line of each centering block are formed in the outer surface of each centering block; and lead angles are arranged on the outer surfaces of positions of two end surfaces of each centering block. The moving type rotary centering guide has the advantages that simplicity is realized; the structure is simplified; the installation is convenient; and the two centering guide blocks can be fastened and connected through screw rods. During the horizontal well overhaul construction, a moving type rotary centering guide body can roll or slide; the friction resistance between a drill pipe and a casing pipe is reduced; the rotation torque is small; the friction coefficient is small; the moving type rotary centering guide per se cannot be abraded; the drill pipe and the casing pipe can be enabled not to be abraded; and the service life of the drill pipe and the service life of the casing pipe are prolonged. The underground tool circulation surface can be increased through the discharging grooves; and underground accidents caused by fluid blockage can be avoided.
Description
Technical field
The invention belongs to drilling field, be specifically related to a kind of movable rotary centralizer。
Background technology
Guangxi oil recovery factory of southwest oil gas branch company of SINOPEC is positioned at Baise Basin In Guangxi, and the first horizontal well of Baise Oilfield was finishing drilling on August 24 in 2013。Through formation testing, go into operation。For increasing this well capacity, in November, 2013, this well is carried out sand fracturing construction。Afterwards because of many reasons, packer is stuck in net horizontal section。
Overhaul unfreezing in order to complete this well is constructed, and instrument jointed rod need to be used to complete construction, and drilling rod enters net horizontal section, and body substantially drags and leans against internal surface of sleeve pipe, adds mill resistance, and not easily makes tools for alignment fish end face。Therefore also need to increasing stile in drill pipe section, common stile is that a similar drill pipe nipple expansion body forms to dimension size。Being typically in underground construction, the structure of drill string avoids too much pipe nipple as far as possible, when common stile just carries when unfreezing is constructed to rig floor plane simultaneously, it is impossible to carry out brill dish construction。
Summary of the invention
It is an object of the invention to the difficult problem solving exist in above-mentioned prior art, it is provided that a kind of movable rotary centralizer, solve in horizontal well overhaul is constructed, the problem stablizing drilling rod guiding。
The present invention is achieved by the following technical solutions:
A kind of movable rotary centralizer, is arranged on drilling rod body, and including at least two wiper block, wiper block is sequentially connected with and encloses cylinder-like structure；
Outer surface at each wiper block is equipped with longitudinal discharge launder parallel with its axis；
Outer surface in two ends of each wiper block is equipped with lead angle。
Inner surface in two ends of each wiper block is equipped with interior inclined-plane。
Outer surface at each wiper block is provided with at least two discharge launders, and every discharge launder extends to another end face from wiper block end face。
Edge at each wiper block is provided with screw, is coupled together by two wiper blocks by inserting screw rod in screw。
Described screw is arranged on the stage casing of wiper block, and uniform along the direction parallel with the axis of wiper block。
The gradient of described lead angle 5 is 5 °～45 °。
Described screw rod adopts interior hexagonal screw rod。
Described wiper block adopts grade of steel P110 to make。
The external diameter of described movable rotary centralizer is Φ 105.7mm to Φ 139.7mm, and the internal diameter of described movable rotary centralizer is Φ 73.02mm to Φ 80.96mm。
Compared with prior art, the invention has the beneficial effects as follows: the present invention is simple and easy, structure simplifies, easy for installation；By screw rod, two pieces of centralizers are fastenedly connected。Many specifications wiper block can be processed according to the specification of sleeve pipe Yu drilling rod。It adopts rigid support, in horizontal well overhaul is constructed, this movable rotary centralizer body can roll or slide, reduce the frictional resistance between drilling rod and sleeve pipe, rotation torque is little, and coefficient of friction is little, and self will not wear and tear, can guarantee that drilling rod, sleeve pipe do not wear and tear, improve the service life of drilling rod, sleeve pipe。Discharge launder can increase downhole tool circulating face, will not block fluid, causes down-hole accident。
Accompanying drawing explanation
The front view of the movable rotary centralizer of Fig. 1
The top view of the movable rotary centralizer of Fig. 2
The left view of the movable rotary centralizer of Fig. 3
The left view of Fig. 4 wiper block
The structural representation of Fig. 5-1 screw rod
Fig. 5-2 is the top view of Fig. 5-1。
Detailed description of the invention
Below in conjunction with accompanying drawing, the present invention is described in further detail:
This invention address that the operation of common stile under needing in running string structure, and directly on drilling rod, increase this device, make drilling rod inherently be provided with the effect of righting guiding。The discharge launder of device body also can increase the circulation of downhole fluid, does not result in down-hole accident。
This invention address that its technical problem employed technical scheme comprise that a kind of movable rotary centralizer, it is mainly used in horizontal well overhaul construction, it is arranged on drilling rod body, as Figure 1-Figure 4, described movable rotary centralizer includes wiper block 1, and (centralizer material can adopt grade of steel P110 to wiper block body。) it is provided with the discharge launder 2 that longitudinal axis with wiper block body is parallel, screw 3 (screwhole position designs the stage casing being evenly distributed in body, devises 4 in the present embodiment), interior hexagonal screw rod 4。During use, being fastened through screw 3 by screw rod 4 by two pieces of wiper blocks 1, this is external to be arranged on drilling rod, whole movable rotary centralizer installation。
One embodiment of the present of invention is as follows:
Described connection is that two pieces of wiper blocks 1 are fastened and fixed through screw 3 by screw rod 4。
Described 1 body diameter of movable rotary centralizer wiper block is 115.9mm, and length is that (this length protection domain is sufficient for the support at horizontal segment of two drilling rods to 350mm, also then is able to ensure that material weight installation process is easy, easily。), the gradient of the lead angle 5 of two ends of wiper block is 5 °～45 °, the present embodiment adopts 5 °, end face 6 external diameter is 142.0mm, internal diameter is 76.2mm, and thickness is 76mm, and interior inclined-plane 7 degree of depth is 20mm, discharge launder 2 degree of depth is the interior hexagonal screw rod 4 that 4.7mm screw 3 uses specification to be CS8.8, as shown in Fig. 5-1 and Fig. 5-2。Φ 105.7mm < centralizer external diameter < Φ 139.7mm, Φ 73.02mm < centralizer internal diameter < Φ 80.96mm。
This invention address that its technical problem employed technical scheme comprise that a kind of movable rotary centralizer, it is mainly used in horizontal well overhaul construction, may be installed (multiple centralizers are enclosed within many drilling rods, each drill rod sleeve one at horizontal segment) on many drilling rod bodies。Primary structure is: be made up of wiper block and screw rod, and body contours is cylindric, two pieces of wiper blocks be formed by connecting by screw rod, and the surface of each wiper block has at least 2 discharge launders, facilitates downhole fluid circulation between drilling tool, it is prevented that meets the accidents such as card and occurs。Both sides are respectively arranged with 4 screws, and 4 screws just disclosure satisfy that being fastenedly connected of this centralizer wiper block。
Technique scheme is one embodiment of the present invention, for those skilled in the art, on the basis that the invention discloses principle, it is easy to make various types of improvement or deformation, it is not limited solely to the structure described by the above-mentioned specific embodiment of the present invention, therefore previously described simply preferred, and not there is restrictive meaning。
Claims (9)
1. a movable rotary centralizer, is arranged on drilling rod body, it is characterised in that: described movable rotary centralizer includes at least two wiper block, and wiper block is sequentially connected with and encloses cylinder-like structure；
Outer surface at each wiper block is equipped with longitudinal discharge launder parallel with its axis；
Outer surface in two ends of each wiper block is equipped with lead angle。
2. movable rotary centralizer according to claim 1, it is characterised in that: the inner surface in two ends of each wiper block is equipped with interior inclined-plane。
3. movable rotary centralizer according to claim 2, it is characterised in that: the outer surface at each wiper block is provided with at least two discharge launders, and every discharge launder extends to another end face from wiper block end face。
4. movable rotary centralizer according to claim 3, it is characterised in that: the edge at each wiper block is provided with screw, is coupled together by two wiper blocks by inserting screw rod in screw。
5. movable rotary centralizer according to claim 4, it is characterised in that: described screw is arranged on the stage casing of wiper block, and uniform along the direction parallel with the axis of wiper block。
6. movable rotary centralizer according to claim 5, it is characterised in that: the gradient of described lead angle 5 is 5 °～45 °。
7. movable rotary centralizer according to claim 6, it is characterised in that: described screw rod adopts interior hexagonal screw rod。
8. the movable rotary centralizer according to claim 1 to 7, it is characterised in that: described wiper block adopts grade of steel P110 to make。
9. movable rotary centralizer according to claim 8, it is characterised in that: the external diameter of described movable rotary centralizer is Φ 105.7mm to Φ 139.7mm, and the internal diameter of described movable rotary centralizer is Φ 73.02mm to Φ 80.96mm。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410685350.6A CN105696949A (en) | 2014-11-25 | 2014-11-25 | Moving type rotary centering guide |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410685350.6A CN105696949A (en) | 2014-11-25 | 2014-11-25 | Moving type rotary centering guide |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105696949A true CN105696949A (en) | 2016-06-22 |
Family
ID=56940757
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410685350.6A Pending CN105696949A (en) | 2014-11-25 | 2014-11-25 | Moving type rotary centering guide |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105696949A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110630216A (en) * | 2019-10-15 | 2019-12-31 | 中国石油集团川庆钻探工程有限公司长庆钻井总公司 | Drill rod mud scraper and using method thereof |
| CN111022015A (en) * | 2018-10-10 | 2020-04-17 | 中国石油化工股份有限公司 | Horizontal well open hole staged fracturing pipe column well descending device |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5810100A (en) * | 1996-11-01 | 1998-09-22 | Founders International | Non-rotating stabilizer and centralizer for well drilling operations |
| CN2697302Y (en) * | 2004-04-02 | 2005-05-04 | 新疆石油管理局钻井公司钻井工具技术服务公司 | Rotary protector for pipe tool |
| GB2393984B (en) * | 2002-10-04 | 2006-04-19 | Polyoil Ltd | Improved downhole device and method |
| CN201184186Y (en) * | 2008-02-04 | 2009-01-21 | 中国石油天然气集团公司 | Snap ring of rubber centralizer |
| CN201460763U (en) * | 2009-05-21 | 2010-05-12 | 四川省杰尼亚化工有限责任公司 | Centralizer for petroleum logging instrument |
| CN201972627U (en) * | 2011-03-23 | 2011-09-14 | 徐德志 | Fastener embedded type centralizer for oil suction pipes |
-
2014
- 2014-11-25 CN CN201410685350.6A patent/CN105696949A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5810100A (en) * | 1996-11-01 | 1998-09-22 | Founders International | Non-rotating stabilizer and centralizer for well drilling operations |
| GB2393984B (en) * | 2002-10-04 | 2006-04-19 | Polyoil Ltd | Improved downhole device and method |
| CN2697302Y (en) * | 2004-04-02 | 2005-05-04 | 新疆石油管理局钻井公司钻井工具技术服务公司 | Rotary protector for pipe tool |
| CN201184186Y (en) * | 2008-02-04 | 2009-01-21 | 中国石油天然气集团公司 | Snap ring of rubber centralizer |
| CN201460763U (en) * | 2009-05-21 | 2010-05-12 | 四川省杰尼亚化工有限责任公司 | Centralizer for petroleum logging instrument |
| CN201972627U (en) * | 2011-03-23 | 2011-09-14 | 徐德志 | Fastener embedded type centralizer for oil suction pipes |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111022015A (en) * | 2018-10-10 | 2020-04-17 | 中国石油化工股份有限公司 | Horizontal well open hole staged fracturing pipe column well descending device |
| CN110630216A (en) * | 2019-10-15 | 2019-12-31 | 中国石油集团川庆钻探工程有限公司长庆钻井总公司 | Drill rod mud scraper and using method thereof |
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Application publication date: 20160622 |
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| RJ01 | Rejection of invention patent application after publication |