CN101942973A - Hydraulic casing centralizer - Google Patents
Hydraulic casing centralizer Download PDFInfo
- Publication number
- CN101942973A CN101942973A CN 201010260624 CN201010260624A CN101942973A CN 101942973 A CN101942973 A CN 101942973A CN 201010260624 CN201010260624 CN 201010260624 CN 201010260624 A CN201010260624 A CN 201010260624A CN 101942973 A CN101942973 A CN 101942973A
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- main body
- wall
- jump ring
- cover
- sleeve
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Abstract
The invention discloses a hydraulic casing centralizer. The hydraulic casing centralizer comprises a main body; an outer wall of the main body is sleeved with a snap spring sleeve; the lower end of the snap spring sleeve is provided with a boss clamped with a shoulder on the outer wall of the main body; an outer wall of the snap spring sleeve is sleeved with a shear pin sleeve fixed with the snap spring sleeve through a shear pin; the outer wall of the snap spring sleeve above the shear pin sleeve is sleeved with a group of snap springs; the outer wall of the snap spring sleeve is provided with a group of snap spring grooves matched with the snap springs; the upper end of the shear pin sleeve is in threaded connection with a sliding sleeve sleeved on the outer walls of the snap spring sleeve and the main body; a ring cavity is formed between the upside of the snap spring sleeve and the sliding sleeve; the wall of the main body which corresponds to the ring cavity is provided with through holes; and a group of supporting blocks which can radially expand and shrink are hinged between the upper end of the sliding sleeve and the boss of the main body. The hydraulic casing centralizer can strictly ensure the centralization of a casing for a vertical well and a horizontal well, reduces the risk of blockage in the process of drilling down the casing due to the structural characteristics of the hydraulic casing centralizer, and has the advantages of safety, reliability, simple site operation and improvement of cementing quality.
Description
Technical field
The present invention relates to belong to drilling engineering completion cementing technology field, especially a kind of fluid pressure type casing stabbing board.
Background technology
In the well cementation process, casing centralization is the key factor that guarantees cementing quality, present applied casing stabbing board has two kinds: elastic centralizer and rigidity centralizer, two kinds of centralizers all exist significant disadvantages, elastic centralizer to set upright effect bad, be difficult to guarantee the centralizer of sleeve pipe, in horizontal cementing, be difficult to especially especially guarantee, near mineshaft diameter, the risk that is hampered, meets card in the setting of casing process is big especially because of external diameter for the rigidity centralizer.
Summary of the invention
In order to solve the problem that exists in the background technology, the purpose of this invention is to provide a kind of fluid pressure type casing stabbing board, this fluid pressure type casing stabbing board can strict guarantee casing centralization degree for straight well, horizontal well, because the design feature of fluid pressure type casing stabbing board has reduced and has been hampered, has met the risk of blocking being lowered to the sleeve pipe process, safe and reliable, site operation is simple, improves cementing quality.
The technical scheme of employing of the present invention is: this fluid pressure type casing stabbing board comprises main body, the main body outer wall is with the jump ring cover, jump ring cover lower end has boss to block mutually with shoulder on the main body outer wall, jump ring cover outer wall is with and cuts off cover, cutting off cover fixes by cutting off with the jump ring cover, the jump ring that cuts off the cover top overlaps on the outer wall and is with one group of jump ring, on the jump ring cover outer wall one group of jump ring groove that matches with jump ring is arranged, cut off the set upper side sliding sleeve that has been threaded, sliding sleeve is enclosed within the outer wall of jump ring cover and main body, between jump ring cover top and the sliding sleeve ring cavity is arranged, on the main wall of ring cavity correspondence through hole is arranged, between the upper end of sliding sleeve and the boss of main body along circumferentially be hinged with radially can breathing at least 3 back-up blocks.
The present invention has following beneficial effect: the state of setting upright of the back-up block of this fluid pressure type casing stabbing board is by pressure controlled, and is simple to operate, safe and reliable.Before suppressing, the back-up block of fluid pressure type casing stabbing board does not open, and the instrument external diameter can guarantee that much smaller than mineshaft diameter fluid pressure type casing stabbing board safety is lowered into assigned address.After suppressing, opening of six back-up blocks is supported on the borehole wall, and support force can reach more than the 11t, has guaranteed the centralizer of sleeve pipe, improves cementing quality, satisfies on-the-spot technological requirement.
This fluid pressure type casing stabbing board is through repeatedly ground experiment and field trial, respond well, satisfy on-the-spot instructions for use, can be used for using in any well types such as straight well, horizontal well, this instrument can also be used with packer, guarantee that packer setting is preceding placed in the middle, improve the quality of the safe and reliable of site operation and well cementation.
Description of drawings:
Accompanying drawing 1 is a structural representation of the present invention.
1-main body, 2-bearing pin, 3-connect that ear, 4-back-up block, 5-sliding sleeve, 6-jump ring cover, 7-jump ring, 8-cut off that cover, 9-cut off, 10-stop collar, 11-jump ring groove, 12-through hole, 13-bearing pin, 14-connection ear down.
The specific embodiment:
The invention will be further described below in conjunction with embodiment: as shown in Figure 1, this fluid pressure type casing stabbing board comprises main body 1, and main body 1 outer wall is with jump ring cover 6, and jump ring overlaps 6 lower ends has boss to block mutually with shoulder on main body 1 outer wall, prevents upwards slip of jump ring cover 6.Jump ring overlap 6 outer walls be with cut off the cover 8, cutting off cover 8 fixes with jump ring cover 6 by cutting off 9, the jump ring that cuts off cover 8 tops overlaps and is with one group of jump ring 7 on 6 outer walls, the upper surface of jump ring 7 is domatic, jump ring overlaps the jump ring groove 11 that has a group to match with jump ring 7 on 6 outer walls, jump ring 7 can only unidirectionally move after falling into jump ring groove 11, promptly can only move up to move down to prevent to move down after sliding sleeve 5 from propping back-up block 4.Cut off cover 8 upper end screw threads and be connected with sliding sleeve 5, sliding sleeve 5 is enclosed within the outer wall of jump ring cover 6 and main body 1, jump ring overlaps between 6 tops and the sliding sleeve 5 ring cavity, on main body 1 wall of ring cavity correspondence through hole 12 is arranged, the liquid of main body 1 inner chamber enters ring cavity through through hole 12, sliding sleeve 5 is cut off to cut off on 9 under hydraulic action and is moved, be hinged with between the boss of the upper end of sliding sleeve 5 and main body 1 radially can breathing one group of back-up block 4, back-up block 4 is at least 3, the present invention selects 6 for use, and the sliding sleeve 5 that moves up is propped the effect of setting upright of playing with back-up block 4, and the present invention's back-up block 4 in the process of going into the well is attached on main body 1 outer wall, avoided being hampered, meet the risk of card, safe and reliable.Down behind assigned address, by suppressing the purpose that back-up block 4 is set upright by jack-up reaching.
Back-up block 4 is by smooth jack-up for convenience, and an end of back-up block 4 passes through bearing pin 2 and connect ear 3 hinged with the boss of main body 1, and it is hinged with the upper end of sliding sleeve 5 to connect ear 14 under the other end of back-up block 4 reaches by lower bearing pin 13.
The lower end outer wall of main body 1 is fixed with stop collar 10, and the upper end inwall of stop collar 10 has annular spacing groove, and the lower end of jump ring cover 6 is stuck in the annular spacing groove and is fixing with it.The effect of stop collar 10 is the positions that limit jump ring cover 6, make it and can not descendingly move, and protection cuts off 9 and is not hung up, opens in advance in the process of going into the well.
The present invention in use, when fluid pressure type casing stabbing board splicing sleeve is lowered into assigned address, turn on pump is suppressed, drilling fluid is in the through hole 12 hydraulic pressure ring cavities of main body 1, when reaching to cut off, hydraulic pressure ring cavity internal pressure cuts off pressure, cutting off 9 cuts off, sliding sleeve 5, jump ring 7, cut off cover 8 because the pressure of hydraulic cavities moves up, hydraulic coupling passes to link ear 3 by sliding sleeve 5, and the connection ear 3 at back-up block 4 two ends supports to six back-up block 4 jack-up on the borehole wall as two power bars, after the pressure release, jump ring 7 enters into the jump ring groove on the jump ring cover 6, form self-locking, stoped sliding sleeve 5 to be return, realize the effect of casing centralization.
Claims (3)
1. fluid pressure type casing stabbing board, comprise main body (1), it is characterized in that: main body (1) outer wall is with jump ring cover (6), jump ring cover (6) lower end has boss to block mutually with shoulder on main body (1) outer wall, jump ring cover (6) outer wall is with and cuts off cover (8), cutting off cover (8) fixes with jump ring cover (6) by cutting off (9), cut off on jump ring cover (6) outer wall of cover (8) top and be with one group of jump ring (7), one group of jump ring groove (11) that matches with jump ring (7) is arranged on jump ring cover (6) outer wall, cut off cover (8) upper end screw thread and be connected with sliding sleeve (5), sliding sleeve (5) is enclosed within the outer wall of jump ring cover (6) and main body (1), between jump ring cover (6) top and the sliding sleeve (5) ring cavity is arranged, on the main body of ring cavity correspondence (1) wall through hole (12) is arranged, between the boss of the upper end of sliding sleeve (5) and main body (1) along circumferentially be hinged with radially can breathing at least 3 back-up blocks (4).
2. fluid pressure type casing stabbing board according to claim 1, it is characterized in that: it is hinged that an end of back-up block (4) reaches the boss that upward connects ear (3) and main body (1) by upper pin (2), and the upper end that connects ear (14) and sliding sleeve (5) under the other end of back-up block (4) reaches by lower bearing pin (13) is hinged.
3. fluid pressure type casing stabbing board according to claim 2, it is characterized in that: the lower end outer wall of main body (1) is fixed with stop collar (10), the upper end inwall of stop collar (10) has annular spacing groove, and the lower end of jump ring cover (6) is stuck in the annular spacing groove and is fixing with it.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010260624 CN101942973A (en) | 2010-08-24 | 2010-08-24 | Hydraulic casing centralizer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010260624 CN101942973A (en) | 2010-08-24 | 2010-08-24 | Hydraulic casing centralizer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101942973A true CN101942973A (en) | 2011-01-12 |
Family
ID=43435155
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201010260624 Pending CN101942973A (en) | 2010-08-24 | 2010-08-24 | Hydraulic casing centralizer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101942973A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103015915A (en) * | 2012-12-07 | 2013-04-03 | 东营百华石油技术开发有限公司 | Hydraulic power sleeve centralizer |
| CN103670297A (en) * | 2012-09-24 | 2014-03-26 | 中国石油天然气集团公司 | Hydraulic casing centralizer |
| CN103670296A (en) * | 2012-09-18 | 2014-03-26 | 中国石油天然气股份有限公司 | Casing centralizer |
| CN104153719A (en) * | 2013-05-13 | 2014-11-19 | 中国石油化工股份有限公司 | Centralizer |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4255847A (en) * | 1978-11-03 | 1981-03-17 | Halliburton Company | Method of making a knockdown centralizer |
| CN200978636Y (en) * | 2006-11-30 | 2007-11-21 | 新疆石油管理局钻井工艺研究院 | Diameter-variable rigid casing centralizer |
| CN201306133Y (en) * | 2008-11-27 | 2009-09-09 | 徐荣恩 | Variable-nominal-diameter centralizer |
-
2010
- 2010-08-24 CN CN 201010260624 patent/CN101942973A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4255847A (en) * | 1978-11-03 | 1981-03-17 | Halliburton Company | Method of making a knockdown centralizer |
| CN200978636Y (en) * | 2006-11-30 | 2007-11-21 | 新疆石油管理局钻井工艺研究院 | Diameter-variable rigid casing centralizer |
| CN201306133Y (en) * | 2008-11-27 | 2009-09-09 | 徐荣恩 | Variable-nominal-diameter centralizer |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103670296A (en) * | 2012-09-18 | 2014-03-26 | 中国石油天然气股份有限公司 | Casing centralizer |
| CN103670296B (en) * | 2012-09-18 | 2016-03-09 | 中国石油天然气股份有限公司 | Casing stabbing board |
| CN103670297A (en) * | 2012-09-24 | 2014-03-26 | 中国石油天然气集团公司 | Hydraulic casing centralizer |
| CN103670297B (en) * | 2012-09-24 | 2015-10-14 | 中国石油天然气集团公司 | Hydraulic casing pipe centering device |
| CN103015915A (en) * | 2012-12-07 | 2013-04-03 | 东营百华石油技术开发有限公司 | Hydraulic power sleeve centralizer |
| CN104153719A (en) * | 2013-05-13 | 2014-11-19 | 中国石油化工股份有限公司 | Centralizer |
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| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20110112 |