CN112360360A - Limit clamp of non-coupling casing centralizer - Google Patents
Limit clamp of non-coupling casing centralizer Download PDFInfo
- Publication number
- CN112360360A CN112360360A CN202011409071.9A CN202011409071A CN112360360A CN 112360360 A CN112360360 A CN 112360360A CN 202011409071 A CN202011409071 A CN 202011409071A CN 112360360 A CN112360360 A CN 112360360A
- Authority
- CN
- China
- Prior art keywords
- locking
- barb
- wall
- clamp spring
- jump ring
- 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.)
- Withdrawn
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Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP 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
- E21B17/1078—Stabilisers or centralisers for casing, tubing or drill pipes
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP 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
- E21B17/12—Devices for placing or drawing out wear protectors
Abstract
The invention relates to a limiting clamp of a non-coupling casing centralizer, which comprises an upper body, a locking clamp spring and a lower body, wherein the upper body, the locking clamp spring and the lower body are all of sleeve-shaped structures, the locking clamp spring is an opening clamp spring, and a plurality of inner teeth of the locking clamp spring are arranged on the inner wall of the locking clamp spring at intervals; go up body, lower body partial cover respectively establish on the both ends outer wall of locking jump ring, just go up the inner wall of body, lower body with lock through barb structure locking between the outer wall of locking jump ring. The limiting clamp can be fixed on a non-coupling casing pipe, one limiting clamp can be respectively arranged on the upper part and the lower part of the casing pipe centralizer, and bears large friction resistance in the process of lowering and lifting the casing pipe, so that the casing pipe centralizer is kept not to axially move on the casing pipe, and the casing pipe centralizer is not stacked together due to the friction resistance to cause a blockage accident in the process of lowering and lifting.
Description
Technical Field
The invention belongs to the technical field of well cementing and completing tools, and particularly relates to a limiting clamp of a non-coupling casing centralizer.
Background
Along with the development of the domestic drilling technology, unconventional well body structures of deep wells and ultra-deep wells appear in succession. The well body structure frequently adopted at present is difficult to meet the requirements of deep wells and ultra-deep wells on different pressure systems or complex series systems, and along with the development of unconventional casings and non-collar casings, the unconventional well body structure is widely applied, and new requirements are provided for corresponding well cementing accessories.
During the drilling, completion and well cementation operation, the centralizer is an effective means for keeping the centering degree of the casing and improving the well cementation quality, and the limiting clamp hoop of the centralizer is a tool for fixing the centralizer.
Go into the sleeve pipe at the well completion in-process of drilling according to the design requirement, because the problem of sleeve pipe dead weight, the wall of a well downwards one side is pressed close to always to the sleeve pipe, receive the frictional resistance influence, the sleeve pipe is transferred, it is great to lift the resistance, it is stuck to take place the sleeve pipe in-process easily, the spacing clamp of centralizer can be effectual fixed sleeve pipe centralizer on the non-coupling sleeve pipe, prevent because the non-coupling sleeve pipe does not have the coupling to block that the centralizer slides and piles up together, reduce the resistance that increases because the centralizer piles up in the casing pipe running process, guarantee the sheathed tube well of going into well smoothly.
Therefore, based on the problems, the limiting clamp for the non-collar casing centralizer is safe, simple to install, capable of locking the centralizer in the required position of the casing, capable of effectively and reliably fixing the centralizer and preventing the centralizer from axially moving relative to the casing, and has important practical significance.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a limiting clamp of a non-coupling casing centralizer, which is safe and simple to mount, can lock the centralizer at a required position of a casing, can effectively and reliably fix the centralizer and prevent the centralizer from axially moving relative to the casing.
The technical problem to be solved by the invention is realized by adopting the following technical scheme:
a limiting clamp of a non-coupling casing centralizer comprises an upper body, a locking clamp spring and a lower body, wherein the upper body, the locking clamp spring and the lower body are all of a sleeve-shaped structure, the locking clamp spring is an opening clamp spring, and a plurality of inner teeth of the locking clamp spring are arranged on the inner wall of the locking clamp spring at intervals;
go up body, lower body partial cover respectively establish on the both ends outer wall of locking jump ring, just go up the inner wall of body, lower body with lock through barb structure locking between the outer wall of locking jump ring.
Furthermore, an upper body locking barb is arranged on the inner wall of the upper body, an upper locking barb of the locking snap spring is arranged on the outer wall of one end of the locking snap spring, and the upper body locking barb is meshed with the locking barb of the locking snap spring, so that the upper body is locked in the direction of disengaging from the locking snap spring; be equipped with down body locking barb on the body inner wall down, be equipped with locking barb down on the locking jump ring other end outer wall, body locking barb and locking jump ring lock barb intermeshing down make the body breaks away from down by locking on the jump ring direction.
Further, go up its internal diameter of position that is equipped with body locking barb on the body inner wall and expand gradually from inside to outside, just go up body locking barb and keep away from locking jump ring side slope distributes, the structure and the distribution direction of locking barb on the locking jump ring outer wall with go up body locking barb cooperation.
Further, be equipped with down its internal diameter of position of body locking barb from inside to outside and enlarge gradually on the body inner wall down, just body locking barb is to keeping away from down the slope of locking jump ring side distributes, the structure and the distribution direction of locking barb down on the locking jump ring outer wall with body locking barb cooperation down.
Furthermore, a plurality of contraction grooves are formed in the outer walls of the two sides of the locking clamp spring at intervals.
The invention has the advantages and positive effects that:
the limiting clamp can be fixed on a non-coupling casing pipe, one limiting clamp can be respectively arranged on the upper part and the lower part of the casing pipe centralizer, and bears large friction resistance in the process of lowering and lifting the casing pipe, so that the casing pipe centralizer is kept not to axially move on the casing pipe, and the casing pipe centralizer is not stacked together due to the friction resistance to cause a blockage accident in the process of lowering and lifting.
Drawings
The technical solutions of the present invention will be described in further detail below with reference to the accompanying drawings and examples, but it should be understood that these drawings are designed for illustrative purposes only and thus do not limit the scope of the present invention. Furthermore, unless otherwise indicated, the drawings are intended to be illustrative of the structural configurations described herein and are not necessarily drawn to scale.
FIG. 1 is a cross-sectional view of the structure of a non-collar casing centralizer limiting clamp according to an embodiment of the present invention;
FIG. 2 is a cross-sectional view of the structure of the upper body of the limit clip of the non-collar casing centralizer according to an embodiment of the present invention;
FIG. 3 is a cross-sectional view of the structure of the locking clip spring of the limiting clamp of the non-collar casing centralizer according to the embodiment of the present invention;
FIG. 4 is a cross-sectional view of the structure of the lower body of the limit clip of the non-collar casing centralizer provided in accordance with an embodiment of the present invention;
FIG. 5 is a schematic side view of a locking clip spring of a limiting clamp of a non-collar casing centralizer according to an embodiment of the present disclosure;
FIG. 6 is a partial structural cross-sectional view of a locking clip spring of a limit clamp of a non-collar casing centralizer according to an embodiment of the present invention;
Detailed Description
First, it should be noted that the specific structures, features, advantages, etc. of the present invention will be specifically described below by way of example, but all the descriptions are for illustrative purposes only and should not be construed as limiting the present invention in any way. Furthermore, any single feature described or implicit in any embodiment or any single feature shown or implicit in any drawing may still be combined or subtracted between any of the features (or equivalents thereof) to obtain still further embodiments of the invention that may not be directly mentioned herein. In addition, for the sake of simplicity, the same or similar features may be indicated in only one place in the same drawing.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or the orientations or positional relationships that the products of the present invention are conventionally placed in use, and are only used for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.
The present invention will be specifically described with reference to fig. 1.
As shown in fig. 1-6, the hoop for limiting the centralizer of the casing without a coupling provided by the embodiment comprises an upper body 1, a locking clamp spring 3 and a lower body 6, wherein the upper body 1, the locking clamp spring 3 and the lower body 6 are all of sleeve-shaped structures, the locking clamp spring 3 is an open clamp spring, and a plurality of internal teeth 8 of the locking clamp spring are arranged on the inner wall of the open clamp spring at intervals, so that the internal teeth 8 of the locking clamp spring are thin teeth, and the damage to the casing without a coupling is reduced;
go up body 1, lower body 6 and partially overlap respectively and establish on the both ends outer wall of locking jump ring 3, just go up the inner wall of body 1, lower body 6 with lock through barb structure locking between the outer wall of locking jump ring 3.
Specifically, in this embodiment, an upper body locking barb 2 is arranged on the inner wall of the upper body 1, an upper locking barb 4 of the locking snap spring is arranged on the outer wall of one end of the locking snap spring 3, and the upper body locking barb 2 is meshed with the upper locking barb 4 of the locking snap spring, so that the upper body 1 is locked in a direction away from the locking snap spring 3; be equipped with down body locking barb 7 on the 6 inner walls of lower body, be equipped with locking barb 5 under the locking jump ring on the 3 other end outer walls of locking jump ring, body locking barb 7 locks 5 intermeshing with the locking jump ring down, makes body 6 breaks away from down by locking in the 3 directions of locking jump ring.
Go up and be equipped with its inner diameter of position of body locking barb 2 on the 1 inner wall of body and expand gradually from inside to outside, just go up body locking barb 2 and to keeping away from locking jump ring 3 is inclined distribution that inclines, locking jump ring on the 3 outer walls of locking jump ring on the structure of locking barb 4 with the direction of distribution with go up body locking barb 2 cooperation.
Its internal diameter of position that is equipped with down body locking barb 7 on the 6 inner walls of lower body enlarges from inside to outside gradually, just body locking barb 7 is to keeping away from down locking jump ring 3 is inclined to one side and is distributed, locking jump ring on the 3 outer walls of locking jump ring down lock barb 5's structure and distribution direction with body locking barb 7 cooperation down.
And a plurality of contraction grooves (10) are formed in the outer walls of the two sides of the locking clamp spring 3 at intervals.
For example, in this embodiment, the special installation tool is used to push the upper body 1 and the lower body 6 to move in opposite directions, the locking clamp spring 3 is tightened, the upper body locking barb 2 is engaged with the locking barb 4 on the locking clamp spring, the locking clamp spring lower locking barb 7 of the lower body 6 is engaged with the locking clamp spring lower locking barb 5, the locking clamp spring inner teeth 8 are engaged with the outer surface of the coupling-free casing pipe when a predetermined pressure is reached, and the fixed installation is performed on the outer surface of the casing pipe to realize the axial movement failure.
The present invention has been described in detail with reference to the above examples, but the description is only for the preferred examples of the present invention and should not be construed as limiting the scope of the present invention. All equivalent changes and modifications made within the scope of the present invention shall fall within the scope of the present invention.
Claims (5)
1. The utility model provides a spacing clamp of no coupling sleeve pipe centralizer which characterized in that: the clamping device comprises an upper body (1), a locking clamp spring (3) and a lower body (6), wherein the upper body (1), the locking clamp spring (3) and the lower body (6) are all of a sleeve-shaped structure, the locking clamp spring (3) is an opening clamp spring, and a plurality of locking clamp spring inner teeth (8) are arranged on the inner wall of the locking clamp spring at intervals;
go up body (1), lower body (6) and partially overlap respectively and establish on the both ends outer wall of locking jump ring (3), just go up the inner wall of body (1), lower body (6) with lock through barb structure between the outer wall of locking jump ring (3).
2. The non-coupled casing centralizer limiting clamp of claim 1, wherein: an upper body locking barb (2) is arranged on the inner wall of the upper body (1), an upper locking barb (4) of a locking clamp spring is arranged on the outer wall of one end of the locking clamp spring (3), and the upper body locking barb (2) is meshed with the upper locking barb (4) of the locking clamp spring, so that the upper body (1) is locked in the direction of disengaging from the locking clamp spring (3); be equipped with down body locking barb (7) on body (6) inner wall down, be equipped with locking barb (5) down on the locking jump ring (3) other end outer wall, body locking barb (7) and locking jump ring lock barb (5) intermeshing down make body (6) break away from down by locking in locking jump ring (3) direction.
3. The non-coupled casing centralizer limiting clamp of claim 2, wherein: go up its internal diameter of position that is equipped with body locking barb (2) on body (1) inner wall and expand gradually from inside to outside, just go up body locking barb (2) and to keeping away from locking jump ring (3) incline to distribute, the structure and the distribution direction of locking barb (4) on the locking jump ring on locking jump ring (3) outer wall with go up body locking barb (2) cooperation.
4. The non-collar casing centralizer limiting clamp of claim 2 or 3, wherein: its internal diameter of position that is equipped with down body locking barb (7) on lower body (6) inner wall enlarges from inside to outside gradually, just body locking barb (7) are to keeping away from down locking jump ring (3) incline and distribute, the structure and the distribution direction of locking under the locking jump ring on locking jump ring (3) outer wall barb (5) with body locking barb (7) cooperation down.
5. The non-coupled casing centralizer limiting clamp of claim 1, wherein: and a plurality of contraction grooves (10) are formed in the outer walls of the two sides of the locking clamp spring (3) at intervals.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011409071.9A CN112360360A (en) | 2020-12-03 | 2020-12-03 | Limit clamp of non-coupling casing centralizer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011409071.9A CN112360360A (en) | 2020-12-03 | 2020-12-03 | Limit clamp of non-coupling casing centralizer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112360360A true CN112360360A (en) | 2021-02-12 |
Family
ID=74535249
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011409071.9A Withdrawn CN112360360A (en) | 2020-12-03 | 2020-12-03 | Limit clamp of non-coupling casing centralizer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112360360A (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2357116A (en) * | 1999-12-11 | 2001-06-13 | Arnold Johan Homme Vervoort | A clamp for securing cables to a elongate member, e.g. a drill string of an oil or gas well |
| US20090255666A1 (en) * | 2008-04-14 | 2009-10-15 | Baker Hughes Incorporated | Stop Collar Friction Clamping Device |
| CN205503034U (en) * | 2016-04-15 | 2016-08-24 | 中国石油集团渤海钻探工程有限公司第一固井分公司 | A clamp for fixing last centralizer of petroleum casing pipe |
| CN207161001U (en) * | 2017-05-17 | 2018-03-30 | 中国石油化工股份有限公司 | A kind of casing stabbing board stopping means |
| CN208364068U (en) * | 2018-06-29 | 2019-01-11 | 四川兆虹油气田技术有限公司 | A kind of oil pumping rod centering device auxiliary locator |
| CN209924931U (en) * | 2019-05-06 | 2020-01-10 | 中国石油集团渤海钻探工程有限公司 | Small-gap well casing elastic centralizer limiting device |
| CN111005688A (en) * | 2018-10-05 | 2020-04-14 | 道恩浩尔产品有限公司 | Small-sized stop collar |
| CN210858608U (en) * | 2019-07-16 | 2020-06-26 | 中国石油化工股份有限公司 | Fixing device for casing centralizer |
-
2020
- 2020-12-03 CN CN202011409071.9A patent/CN112360360A/en not_active Withdrawn
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2357116A (en) * | 1999-12-11 | 2001-06-13 | Arnold Johan Homme Vervoort | A clamp for securing cables to a elongate member, e.g. a drill string of an oil or gas well |
| US20090255666A1 (en) * | 2008-04-14 | 2009-10-15 | Baker Hughes Incorporated | Stop Collar Friction Clamping Device |
| CN205503034U (en) * | 2016-04-15 | 2016-08-24 | 中国石油集团渤海钻探工程有限公司第一固井分公司 | A clamp for fixing last centralizer of petroleum casing pipe |
| CN207161001U (en) * | 2017-05-17 | 2018-03-30 | 中国石油化工股份有限公司 | A kind of casing stabbing board stopping means |
| CN208364068U (en) * | 2018-06-29 | 2019-01-11 | 四川兆虹油气田技术有限公司 | A kind of oil pumping rod centering device auxiliary locator |
| CN111005688A (en) * | 2018-10-05 | 2020-04-14 | 道恩浩尔产品有限公司 | Small-sized stop collar |
| CN209924931U (en) * | 2019-05-06 | 2020-01-10 | 中国石油集团渤海钻探工程有限公司 | Small-gap well casing elastic centralizer limiting device |
| CN210858608U (en) * | 2019-07-16 | 2020-06-26 | 中国石油化工股份有限公司 | Fixing device for casing centralizer |
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| 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 | ||
| WW01 | Invention patent application withdrawn after publication | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20210212 |