CN207092983U - Small―gap suture well one piece rigid centralizer - Google Patents
Small―gap suture well one piece rigid centralizer Download PDFInfo
- Publication number
- CN207092983U CN207092983U CN201721074226.1U CN201721074226U CN207092983U CN 207092983 U CN207092983 U CN 207092983U CN 201721074226 U CN201721074226 U CN 201721074226U CN 207092983 U CN207092983 U CN 207092983U
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- sleeve pipe
- top connection
- piece rigid
- righting strip
- external diameter
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Abstract
The utility model provides a kind of small―gap suture well one piece rigid centralizer, including：Body and the rigid righting strip around some axial directions of body even circumferential distribution, it is guiding gutter between adjacent righting strip, the body upper part connects top connection, its external diameter is slightly larger than body, as sleeve pipe box when using, at the top of top connection bottom and righting strip in the axial direction at intervals, the ring-shaped depression between the two forms fluid expansion slot.The utility model has the characteristics of righting intensity is high, casing centering tripping in is unimpeded, more importantly annular space circulation area outside enough pipes is ensure that by a series of structure designs of righting strip, guiding gutter and fluid expansion slot, fluid negotiability is effectively improved, than elastic centralizer area of passage increase more than 45%.It can effectively avoid sleeve pipe tripping in difficult using the utility model and circulation is sprained the problem of stifled, help to lift Slim Hole Cementing drilling fluid and circulate displacement efficiency, improve cementing quality.
Description
Technical field：
Field of oil drilling is the utility model is related to, is applied to more particularly to a kind of in small―gap suture well cementing operation
One piece rigid centralizer.
Background technology：
Various forms and the centralizer of specification are one of instruments the most frequently used in current cementing operation, and its main function is to protect
It is placed in the middle in pit shaft to demonstrate,prove sleeve pipe, improves cementing quality.It is existing conventional various to help in the cementing operation of small―gap suture casing programme
Positive device is enclosed in sleeve body when in use, but is enclosed on the centralizer body in sleeve body and can be reduced the circulation of annular space and lead to
Road, the problem of easily causing to be pumped height, displacement efficiency difference in cementing operation.In addition, for integral joint casing, conventional righting needs
To be fixed using clip, and the clamping force of clip is limited, in tripping in process due to the effect of frictional resistance and well stuck point, usually
Cause centralizer to be packed together, do not have centralizing function not only, and easily formed sprain it is stifled.
Field investigation also indicates that conventional centralizer is in small―gap suture well and integral joint casing well, because stationarity is poor, external diameter
Greatly, easily cause sleeve pipe tripping in difficult and circulation is sprained the problem of stifled, have a strong impact on well cementation second interface cement ring quality, cause to cement the well
Bias, cementing quality are poor.
The content of the invention：
In order to solve above-mentioned conventional centralizer problem present in small―gap suture well cementing operation, the utility model provides
A kind of one piece rigid centralizer being applied in small―gap suture well cementing operation, have in design structure circulation area it is big,
The advantages that righting intensity is high, stability is good.
The technical solution of the utility model is as follows：
The small―gap suture well one piece rigid centralizer, including：What body and circular body even circumferential were distributed
The rigid righting strip of some axial directions, it is guiding gutter between the adjacent righting strip；The top connection top connection of the body,
The external diameter of top connection is slightly larger than body external diameter, and body external diameter is consistent with sleeve outer, as cannula carrier when the top connection uses
At the top of button, top connection bottom and righting strip in the axial direction at intervals, the ring-shaped depression between the two forms fluid extension
Groove.
Further, the bottom connection lower contact of the body, the external diameter of the lower contact is slightly less than body external diameter, under connect
Head is used as sleeve pipe pin thread when in use.In order to further increase the circulation area at casing coupling, the length of the lower contact is set
Meter is preferred to be met：After connection sleeve pipe, the connecting portion of lower contact and body and sleeve pipe are in the axial direction at intervals.
Further, for the righting strip while righting intensity is ensured, the accumulative sectional area of all righting strips is less than set
Relative to the circulation area decrement of sleeve pipe at pipe box cupling.The design can increase the circulating face at righting strip to greatest extent
Product.
Further, the width of the fluid expansion slot is 20mm~40mm.The width design ensure that at casing coupling
With enough circulation areas, effectively prevent conventional cannula box cupling and righting strip it is direct dock caused by circulation area reduce
Synergistic effect.
Further, the profile at the righting strip both ends is High angle arc transition, so that pipe string slides in pit shaft,
It is easy to tripping in.
Further, the body, top connection and the internal diameter of lower contact are consistent with casing inner diameter, to ensure construction knot
Tripping in of the next step construction tool in pipe is not interfered with after beam.
The utility model has the characteristics of righting intensity is high, casing centering tripping in is unimpeded, it is often more important that by righting strip,
A series of structure designs of guiding gutter and fluid expansion slot ensure that the outer annular space circulation area of enough pipes, can effectively improve
Fluid negotiability, than elastic centralizer area of passage increase more than 45%.Sleeve pipe can effectively be avoided using the utility model
Tripping in is difficult and circulation is sprained the problem of stifled, helps to lift Slim Hole Cementing drilling fluid and circulates displacement efficiency, improves solid
Well quality.
Brief description of the drawings：
Fig. 1 is the structural representation of the utility model small―gap suture well one piece rigid centralizer；
Fig. 2 is body sectional view of the present utility model.
Embodiment：
The technical characteristics of the utility model and effect are specifically described below in conjunction with the accompanying drawings.As shown in Figures 1 and 2,
The small―gap suture well one piece rigid centralizer includes：Body 1 and some axles around the distribution of the even circumferential of body 1
To rigid righting strip 4, righting strip 4 and body 1 are the shaping of integral material turnning and milling in the present embodiment, to ensure the strong of centralizer
Degree, the bottom footpath (external diameter of body 1) of righting strip 4 are consistent with sleeve outer.It is guiding gutter 5 between adjacent righting strip 4, the body
1 top connection top connection 2, its external diameter are slightly larger than body 1, are provided with screw thread as sleeve pipe box, inner circumferential surface when using, can lead to
Cross screw thread mating connection sleeve pipe；At the top of the bottom of top connection 2 and righting strip 4 in the axial direction at intervals, the ring between the two
Shape depression forms fluid expansion slot 3.The bottom connection lower contact 6 of body 1, the external diameter of the lower contact 6 are slightly less than outside body 1
Footpath, external screw thread is provided with as sleeve pipe pin thread, the surface of lower contact 6 when using, can be by screw thread mating connection sleeve pipe, in the present embodiment
In, the Design of length of lower contact 6 meets：After connection sleeve pipe, (connecting portion of the two is because outer for the connecting portion of lower contact 6 and body 1
Footpath difference and form ring-shaped step) with sleeve pipe in the axial direction at intervals, thus can be in the step and set at the top of lower contact 6
The annular groove of similar fluid expansion slot 3 is formed between pipe.The accumulative sectional area of all righting strips 4 is relative less than at casing coupling
In the circulation area decrement of sleeve pipe, the design can increase the circulation area at righting strip to greatest extent.The present embodiment is adopted
With a kind of preferably selection：The quantity of righting strip 4 is 6, and every width is 15~20mm, and 6 righting strip even circumferentials are distributed
In the outer peripheral face of body 1.In addition, the profile at the both ends of righting strip 4 is designed as High angle arc transition, so that pipe string is slided in pit shaft
It is dynamic, it is easy to tripping in.In addition, the internal diameter of body 1, top connection 2 and lower contact 6 is also kept with the internal diameter of its sleeve pipe being connected
Unanimously, with ensure construction terminate after do not interfere with tripping in of the next step construction tool in pipe.
The width of fluid expansion slot 3 is 20mm~40mm, and the width design, which ensure that, has enough stream at casing coupling
Logical area, effectively prevent conventional cannula box cupling and righting strip it is direct dock caused by circulation area reduction synergistic effect.
After connection sleeve pipe, the ring that is formed between fluid expansion slot 3 and the ring-shaped step and sleeve pipe of lower contact 6 and the connecting portion of body 1
The structure design of connected in star makes the circulation area of whole centralizer all sites be all higher than or equal to the stream at conventional cannula box cupling
Logical area, also ensure that the circulating face of annular space outside whole pipe string pipe to greatest extent while ensure that the centralizer of sleeve pipe
Product, it is highly beneficial to small―gap suture well cementing operation.
Above-mentioned embodiment is merely to illustrate the utility model, every to be carried out on the basis of technical solution of the present invention
Equivalents and improvement, should not exclude outside protection scope of the present invention.
Claims (7)
- A kind of 1. small―gap suture well one piece rigid centralizer, it is characterised in that including：Body (1) and circular body (1) The rigid righting strip (4) of some axial directions of even circumferential distribution, is guiding gutter (5) between adjacent righting strip (4)；Body (1) top connection top connection (2), the external diameter of top connection (2) are slightly larger than body (1) external diameter, body (1) external diameter and sleeve outer Unanimously, the top connection (2) is used as sleeve pipe box when in use, top connection (2) bottom and phase in the axial direction at the top of righting strip (4) Every a certain distance, the ring-shaped depression between the two forms fluid expansion slot (3).
- 2. one piece rigid centralizer according to claim 1, it is characterised in that：Connect under body (1) the bottom connection Head (6), the external diameter of the lower contact (6) are slightly less than body (1) external diameter, and lower contact (6) is used as sleeve pipe pin thread when in use.
- 3. one piece rigid centralizer according to claim 2, it is characterised in that：The length of the lower contact (6) meets： After connection sleeve pipe, the connecting portion of lower contact (6) and body (1) and sleeve pipe are in the axial direction at intervals.
- 4. the one piece rigid centralizer according to any one in claims 1 to 3, it is characterised in that：Helped described in all The accumulative sectional area of positive bar (4) is less than the circulation area decrement at casing coupling relative to sleeve pipe.
- 5. the one piece rigid centralizer according to any one in claims 1 to 3, it is characterised in that：The fluid expands The width for opening up groove (3) is 20mm~40mm.
- 6. the one piece rigid centralizer according to any one in claims 1 to 3, it is characterised in that：The righting strip (4) profile at both ends is High angle arc transition.
- 7. the one piece rigid centralizer according to Claims 2 or 3, it is characterised in that：The body (1), top connection (2) And the internal diameter of lower contact (6) is consistent with casing inner diameter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721074226.1U CN207092983U (en) | 2017-08-25 | 2017-08-25 | Small―gap suture well one piece rigid centralizer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721074226.1U CN207092983U (en) | 2017-08-25 | 2017-08-25 | Small―gap suture well one piece rigid centralizer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207092983U true CN207092983U (en) | 2018-03-13 |
Family
ID=61539972
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721074226.1U Active CN207092983U (en) | 2017-08-25 | 2017-08-25 | Small―gap suture well one piece rigid centralizer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207092983U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113216870A (en) * | 2021-05-24 | 2021-08-06 | 中石化石油工程技术服务有限公司 | Straight wing type resin casing centralizer and installation method thereof |
-
2017
- 2017-08-25 CN CN201721074226.1U patent/CN207092983U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113216870A (en) * | 2021-05-24 | 2021-08-06 | 中石化石油工程技术服务有限公司 | Straight wing type resin casing centralizer and installation method thereof |
| CN113216870B (en) * | 2021-05-24 | 2022-05-20 | 中石化石油工程技术服务有限公司 | Straight wing type resin casing centralizer and installation method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20210629 Address after: 100007 No. 9 North Main Street, Dongcheng District, Beijing, Dongzhimen Patentee after: CHINA NATIONAL PETROLEUM Corp. Patentee after: CNPC Bohai Drilling Engineering Co.,Ltd. Address before: No.23 Yanshan Road, Renqiu City, Cangzhou City, Hebei Province 062552 Patentee before: CNPC Bohai Drilling Engineering Co.,Ltd. |
|
| TR01 | Transfer of patent right |