CN104153722A - Casing centralizer - Google Patents
Casing centralizer Download PDFInfo
- Publication number
- CN104153722A CN104153722A CN201410332882.1A CN201410332882A CN104153722A CN 104153722 A CN104153722 A CN 104153722A CN 201410332882 A CN201410332882 A CN 201410332882A CN 104153722 A CN104153722 A CN 104153722A
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- CN
- China
- Prior art keywords
- casing
- main body
- stabbing board
- piston
- casing stabbing
- 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 discloses a casing centralizer and relates to the field of petroleum machinery. The casing centralizer comprises a centering device, a stop device, a hydraulic device and a body. The casing centralizer is characterized in that the centering device refers to a spring piece, and 3-8 evenly, axially, symmetrically distributed support pieces are arranged on the centering spring piece. The casing centralizer has the advantages of safe tripping in, cyclone generation and high centering performance.
Description
Technical field
The present invention relates to petroleum machinery field, be specifically related to casing stabbing board.
Technical background
According to statistics, surpass 90% shale gas horizontal well and adopt casing cementing, be conducive to wellbore stability and later stage to take well stimulation etc.For improving cementing quality, centralizer is installed on sleeve pipe conventionally.Because shale water suction can be expanded, well easily collapses and is out of shape, therefore more harsh to the requirement of centralizer.Current centralizer all exists the problem that centralizer is not high, and because the restriction of external diameter makes servant's difficulty.
Summary of the invention
In order to address the above problem, the invention provides a kind of casing stabbing board that safety was lowered to, produced eddy flow, has higher centralizer performance that simultaneously possesses.
Casing stabbing board of the present invention, comprises erection device, stopping device, hydraulic means and main body, and described righting mechanism is righting spring leaf, is provided with the support chip that 3～8 Homogeneous Axisymmetricals distribute on described righting spring leaf.
Preferably, stopping device comprises spring and retaining hole, and described retaining hole is arranged in main body, and described retaining is also provided with retaining pin in hole.
Preferably, hydraulic means comprises inner seal ring, exterior seal ring, piston and hydraulic cavities, and described hydraulic cavities outside has several helicla flutes, and piston is hollow circular ring shape, and described piston bush is connected in main body, is also provided with hydraulic pressure hole in main body.
Preferably, casing stabbing board one end is connected with casing coupling, it is characterized in that described casing stabbing board external diameter equates with casing coupling external diameter.
The present invention possesses safety simultaneously and is lowered to, produces eddy flow, has higher centralizer performance.
Accompanying drawing explanation
Fig. 1 is casing stabbing board structural representation.
Reference numeral: 1-casing coupling, 2-hydraulic pressure hole, 3-inner seal ring, 4-exterior seal ring, 5-piston, 6-spring, 7-retaining pin, 8-hydraulic cavities, 9-retaining hole, 10-righting spring leaf, 11-main body.
The specific embodiment
Casing stabbing board of the present invention, comprises erection device, stopping device, hydraulic means and main body 11, and described righting mechanism is righting spring leaf 10, is provided with the support chip that 3～8 Homogeneous Axisymmetricals distribute on described righting spring leaf 10.Stopping device comprises spring 6 and retaining hole 9, and described retaining hole 9 is arranged in main body 11, in described retaining hole 9, is also provided with retaining pin 7.Hydraulic means comprises inner seal ring 3, exterior seal ring 4, piston 5 and hydraulic cavities 8, and described hydraulic cavities 8 outsides have several helicla flutes, and piston 5 is hollow circular ring shape, and described piston 5 is socketed in main body 11, is also provided with hydraulic pressure hole 2 in main body 11.Casing stabbing board one end is connected with casing coupling 1, it is characterized in that described casing stabbing board external diameter equates with casing coupling 1 external diameter.
Before being lowered to, make righting spring leaf 10 in pre-bending state radially, so that its hydraulic pressure required during to casing centering is less, easier righting.Sleeve pipe is lowered in process, righting spring leaf 10 is contracted in hydraulic cavities the inside, not only can guarantee that the process that the is lowered to reed of being hit by a bullet can not overhang, can also make to become very little with the external diameter of the radial variable casing tube centralizer of eddy flow function, during setting of casing, can significantly reduce sleeve pipe frictional resistance, significantly increase cased safety.When well cementation pipe string is lowered into assigned address, radial variable casing tube centralizer with eddy flow function is added to hydraulic pressure, now the hydraulic pressure hole of hydraulic pressure main body 11 is delivered on piston, piston moves right, thereby axial compression righting spring leaf, support chip radial deformation in radially pre-bending on righting spring leaf, spring and retaining pin move right simultaneously.When moving to design attitude, retaining pin coordinates with retaining hole under the elastic force of spring, thereby stops spring leaf to be moved to the left, and now spring leaf can not radial contraction, and casing centering is complete.During to well cementing well, cement paste produces eddy flow on helicla flute, thereby improves the displacement efficiency of cement paste, finally reaches the object that improves cementing quality.
Claims (4)
1. a casing stabbing board, comprise erection device, stopping device, hydraulic means and main body (11), it is characterized in that described righting mechanism is righting spring leaf (10), on described righting spring leaf (10), be provided with the support chip that 3～8 Homogeneous Axisymmetricals distribute.
2. casing stabbing board as claimed in claim 1, is characterized in that described stopping device comprises spring (6) and retaining hole (9), and it is upper that described retaining hole (9) is arranged on main body (11), is also provided with retaining pin (7) in described retaining hole (9).
3. casing stabbing board as claimed in claim 1, it is characterized in that described hydraulic means comprises inner seal ring (3), exterior seal ring (4), piston (5) and hydraulic cavities (8), described hydraulic cavities (8) outside has several helicla flutes, piston (5) is hollow circular ring shape, it is upper that described piston (5) is socketed in main body (11), is also provided with hydraulic pressure hole (2) in main body (11).
4. casing stabbing board as claimed in claim 1, casing stabbing board one end is connected with casing coupling (1), it is characterized in that described casing stabbing board external diameter equates with casing coupling (1) external diameter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410332882.1A CN104153722A (en) | 2014-07-14 | 2014-07-14 | Casing centralizer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410332882.1A CN104153722A (en) | 2014-07-14 | 2014-07-14 | Casing centralizer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104153722A true CN104153722A (en) | 2014-11-19 |
Family
ID=51879333
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410332882.1A Pending CN104153722A (en) | 2014-07-14 | 2014-07-14 | Casing centralizer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104153722A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105756563A (en) * | 2016-05-04 | 2016-07-13 | 沧州格锐特钻头有限公司 | Combined PDC (Polycrystalline Diamond Compact) bit |
| CN105756564A (en) * | 2016-05-04 | 2016-07-13 | 沧州格锐特钻头有限公司 | Efficient drilling combined coring PDC drill bit |
| CN111441743A (en) * | 2020-04-22 | 2020-07-24 | 中石化石油工程技术服务有限公司 | Diversion locator for casing of highly deviated well and horizontal well |
| CN113123733A (en) * | 2021-05-18 | 2021-07-16 | 中国农业大学 | Variable-diameter centralizer based on control of self-expanding material meeting oil when meeting water and mechanical performance testing device thereof |
-
2014
- 2014-07-14 CN CN201410332882.1A patent/CN104153722A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105756563A (en) * | 2016-05-04 | 2016-07-13 | 沧州格锐特钻头有限公司 | Combined PDC (Polycrystalline Diamond Compact) bit |
| CN105756564A (en) * | 2016-05-04 | 2016-07-13 | 沧州格锐特钻头有限公司 | Efficient drilling combined coring PDC drill bit |
| CN105756564B (en) * | 2016-05-04 | 2018-05-25 | 沧州格锐特钻头有限公司 | A kind of combined type coring PDC bit efficiently crept into |
| CN105756563B (en) * | 2016-05-04 | 2018-08-31 | 沧州格锐特钻头有限公司 | A kind of combined type PDC drill bit |
| CN111441743A (en) * | 2020-04-22 | 2020-07-24 | 中石化石油工程技术服务有限公司 | Diversion locator for casing of highly deviated well and horizontal well |
| CN113123733A (en) * | 2021-05-18 | 2021-07-16 | 中国农业大学 | Variable-diameter centralizer based on control of self-expanding material meeting oil when meeting water and mechanical performance testing device thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20141119 |
|
| WD01 | Invention patent application deemed withdrawn after publication |