CN105178882A - Elbow-type dual-thrust hydraulic centralizer - Google Patents
Elbow-type dual-thrust hydraulic centralizer Download PDFInfo
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- CN105178882A CN105178882A CN201510718243.3A CN201510718243A CN105178882A CN 105178882 A CN105178882 A CN 105178882A CN 201510718243 A CN201510718243 A CN 201510718243A CN 105178882 A CN105178882 A CN 105178882A
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Abstract
The invention provides an elbow-type dual-thrust hydraulic centralizer. The elbow-type dual-thrust hydraulic centralizer comprises a hydraulic thrust system and a centering system, wherein the hydraulic thrust system comprises a main body, hydraulic cylinders and a retaining system; the hydraulic cylinders are arranged on the main body; a piston is arranged in each hydraulic cylinder; the hydraulic cylinders and the pistons act on the centering system through in-pipe pressure building to realize centering; the retaining system can realize permanent centering after in-pipe pressure relief; the centering system comprises a push ring, a positioning block and at least four groups of elbows uniformly distributed on the circumference of the main body; the push ring is connected with the pistons; the positioning block is fixed to the middle of the main body; one end of each elbow is fixed on the push ring, and the other end of each elbow is fixed on the positioning block; an included angle is formed between each elbow and the main body; and the centering system can be started up by an extremely small starting force. The bidirectional hydraulic system ensures no axial displacement of the centering system; owing to the unique pre-bending structural design, the starting force of the centering system becomes smaller; and the elbow-type dual-thrust hydraulic centralizer is suitable for centering casings of both horizontal wells and highly-deviated wells.
Description
Technical field
The invention belongs to hydraulic centralizing device field, especially relate to a kind of curved elbow formula pair and push away hydraulic centralizing device.
Background technology
In prior art, the casing stabbing board often used mainly contains elastic centralizer and rigid centralizer.In horizontal well and High angle well, because pipe string is heavier, the elastic steel sheet of elastic centralizer is easy to deform, and righting effect is also bad.Rigid centralizer (comprising rolling wheel centralizer) adds the external diameter of whole pipe string, enters difficulty under causing pipe string.If borehole condition is not ideal enough, is easy to cause and is hampered.In horizontal well and high angle hole, due under enter process centralizer and against the borehole wall all the time, scraping well, be easy to cause silt particle to pile up, causing cannot turn on pump.In " sugarcoated haws " and " pregnant " well section, these two kinds of centralizers cannot play centralizing function more.For technological deficiency existing in prior art, research and develop a kind of enter well time do not increase the outside dimension of pipe string, enter under being easy to pipe string, after pipe string puts in place, rely on hydraulic thrust, realizing pipe string curved elbow formula placed in the middle, two to push away hydraulic centralizing device be a problem demanding prompt solution.
Summary of the invention
In view of this, the present invention is intended to propose a kind of structure curved elbow formula simple, easy to use pair and pushes away hydraulic centralizing device, is particularly useful in the solid completion practice of oil and gas industry.
For achieving the above object, technical scheme of the present invention is achieved in that
A kind of curved elbow formula is two pushes away hydraulic centralizing device, comprises hydraulic thrust system and centralizing system, described hydraulic thrust system comprises body, hydraulic cylinder and retaining system, be provided with two described hydraulic cylinders on the body, piston is provided with in described hydraulic cylinder, between described piston and hydraulic cylinder, hydraulic pressure cavity volume is equipped with between piston and body, gap is there is between described piston and body, and by the sealing of " O " RunddichtringO, the well cementation compression packer that described retaining system is ZL201420191847.8 with reference to the patent No. designs, the elastic collar that described retaining system comprises protection box and is arranged in described protection box, sawtooth draw-in groove is provided with on the body with described elastic collar corresponding section, described protection box is arranged on the top of described piston, enable elastic collar freely movable, move to the sawtooth draw-in groove place on body together with elastic collar under the effect of thrust, elastic collar shrinks, enter sawtooth draw-in groove, hydraulic cylinder is made to do one-way movement, limit its retraction, play the effect of retaining.Described two hydraulic cylinders are equipped with and cut off, by described cutting off, piston is fixed on hydraulic cylinder, cuts off when well head is suppressed after cutting off, two piston actions simultaneously, promotion retaining system and throw-out collar axially move along body to center, promote the distortion of curved elbow and realize righting function.Described centralizing system comprises throw-out collar, locating piece and the curved elbow of at least 4 groups, described curved elbow is evenly distributed on body circumferentially, guarantee the righting effect placed in the middle of sleeve pipe, ensure that the circulation area that well is starched simultaneously, described throw-out collar is connected with piston, described locating piece is fixed in the middle of body, carry out spacing to forward piston stroke, and distortion prestressing force angle is provided, one end of described curved elbow is fixed on throw-out collar, the other end is fixed on locating piece, has angle between described curved elbow and body, and very little tripping force can realize centralizing system and start.
Further, be also provided with Adjusting bolt Adjusting screw on the body, described Adjusting bolt Adjusting screw is connected with body by screw thread, and controls each part fits gap by screw thread rotation.
Further, the upper end of described body is connected with bunch tube by top connection, and described top connection upper end is casing threads box, be connected with bunch tube, lower end adopts casing threads to be connected with body, and the lower end of described body is casing threads pin thread, is connected with bunch tube.
Further, described curved elbow is 4-6 group, adopts and has the production of certain thickness high-quality steel bar, often organize between curved elbow and pass through pinned connection.
Further, described hydraulic cylinder and body are fixed by trip bolt.
Relative to prior art, curved elbow formula of the present invention pair pushes away hydraulic centralizing utensil following advantage: this centralizer entire outer diameter is little, enter under being convenient to bunch tube, after pipe string puts in place, relying on builds the pressure makes piston movement, promotes overall centralizing system and expands, support pipe string placed in the middle, two-way hydraulic cylinder can guarantee that centralizing system is without axial displacement, and unique pre-bent structure design makes the tripping force of centralizing system less, is applicable to the casing centering of horizontal well, high angle hole; There is the advantages such as global design precision, righting be effective, simple to operate, safe and reliable.
Accompanying drawing explanation
The accompanying drawing forming a part of the present invention is used to provide a further understanding of the present invention, and schematic description and description of the present invention, for explaining the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 is the structural representation before righting of the present invention;
Fig. 2 is the structural representation after righting of the present invention.
Description of reference numerals:
1-top connection, 2-body, 3-hydraulic cylinder, 4-piston, 5-cuts off, 6-Adjusting bolt Adjusting screw, 7-throw-out collar, 8-locating piece, the curved elbow of 9-.
Detailed description of the invention
It should be noted that, when not conflicting, the embodiment in the present invention and the feature in embodiment can combine mutually.
Below with reference to the accompanying drawings and describe the present invention in detail in conjunction with the embodiments.
As illustrated in fig. 1 and 2, a kind of curved elbow formula is two pushes away hydraulic centralizing device, comprises hydraulic thrust system and centralizing system; Described hydraulic thrust system comprises body 2, hydraulic cylinder 3 and retaining system, described body 2 is provided with two described hydraulic cylinders 3, described hydraulic cylinder 3 is fixed by trip bolt with body 2, piston 4 is provided with in described hydraulic cylinder 3, between described piston 4 and hydraulic cylinder 3, between piston 4 and body 2, be equipped with hydraulic pressure cavity volume, gap is there is between described piston 4 and body 2, and by the sealing of " O " RunddichtringO, the well cementation compression packer that described retaining system is ZL201420191847.8 with reference to the patent No. designs.The elastic collar that described retaining system comprises protection box and is arranged in described protection box; described body 2 is provided with sawtooth draw-in groove with described elastic collar corresponding section; described protection box is arranged on the top of described piston 4; enable elastic collar freely movable, under the effect of thrust, move to the sawtooth draw-in groove place on body 2 together with elastic collar, elastic collar shrinks; enter sawtooth draw-in groove; make hydraulic cylinder 3 do one-way movement, limit its retraction, play the effect of retaining.Described two hydraulic cylinders 3 are equipped with and cut off 5, cut off 5 by described piston 4 is fixed on hydraulic cylinder 3, cut off when well head is suppressed after cutting off 5, two pistons 4 actions simultaneously, promotion retaining system and throw-out collar 7 axially move along body 2 to center, promote the distortion of curved elbow 9 and realize righting function.The upper end of described body 2 is connected with bunch tube by top connection 1, described top connection 1 upper end is casing threads box, be connected with bunch tube, lower end adopts casing threads to be connected with body 2, the lower end of described body 2 is casing threads pin thread, is connected with bunch tube, and described body 2 is also provided with Adjusting bolt Adjusting screw 6, described Adjusting bolt Adjusting screw 6 is connected with body 2 by screw thread, and controls each part fits gap by screw thread rotation.
Described centralizing system comprises throw-out collar 7, the curved elbow 9 of locating piece 8 and at least 4 group, described curved elbow 9 is evenly distributed on body 2 circumferentially, guarantee the righting effect placed in the middle of sleeve pipe, ensure that the circulation area that well is starched simultaneously, preferably, described curved elbow 9 is 4-6 group, employing has certain thickness high-quality steel bar and produces, often organize between curved elbow 9 and pass through pinned connection, described throw-out collar 7 is connected with piston 4, described locating piece 8 is fixed in the middle of body 2, carry out spacing to piston 4 process, and distortion prestressing force angle is provided, one end of described curved elbow 9 is fixed on throw-out collar 7, the other end is fixed on locating piece 8, between described curved elbow 9 and body 2, there is certain angle, very little tripping force can realize centralizing system and start.
The course of work of this example: after pipe string puts in place, dependence builds the pressure and piston 4 is moved, and promotes centralizing system and expands, support pipe string placed in the middle, promote centralizing system and realize righting, retaining system realizes permanent righting after can guaranteeing to manage interior pressure release, and bidirectional hydraulic push system acts on simultaneously, promote curved elbow 9 and realize righting function, axial displacement is not had after the strong point can be made to start, safer, reliably.
This curved elbow formula is two to be pushed away under hydraulic centralizing device is convenient to the pipe string of horizontal well and high angle hole, and significantly improves drilling fluid, especially in " sugarcoated haws " " pregnant " well, thus improves cementing quality.The maximum advantage of this hydraulic centralizing device adopts two-way fluid cylinder to promote, and when centralizing system launches, the strong point is without the need to producing displacement, and other fluid pressure type centralizer strong point can be avoided to be absorbed in ground layer gap cannot be moved, and the situation causing righting effect bad occurs.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (5)
1. curved elbow formula is two pushes away a hydraulic centralizing device, it is characterized in that: comprise hydraulic thrust system and centralizing system;
Described hydraulic thrust system comprises body, hydraulic cylinder and retaining system, be provided with two described hydraulic cylinders on the body, piston is provided with in described hydraulic cylinder, between described piston and hydraulic cylinder, hydraulic pressure cavity volume is equipped with between piston and body, gap is there is between described piston and body, and by the sealing of " O " RunddichtringO, the elastic collar that described retaining system comprises protection box and is arranged in described protection box, sawtooth draw-in groove is provided with on the body with described elastic collar corresponding section, described protection box is arranged on the top of described piston, described two hydraulic cylinders are equipped with and cut off, by described cutting off, piston is fixed on hydraulic cylinder,
Described centralizing system comprises throw-out collar, locating piece and the curved elbow of at least 4 groups, described curved elbow is evenly distributed on body circumferentially, described throw-out collar is connected with piston, described locating piece is fixed in the middle of body, one end of described curved elbow is fixed on throw-out collar, the other end is fixed on locating piece, has angle between described curved elbow and body.
2. the curved elbow formula of one according to claim 1 is two pushes away hydraulic centralizing device, and it is characterized in that: be also provided with Adjusting bolt Adjusting screw on the body, described Adjusting bolt Adjusting screw is connected with body by screw thread.
3. the curved elbow formula of one according to claim 1 and 2 is two pushes away hydraulic centralizing device, it is characterized in that: the upper end of described body is connected with bunch tube by top connection, described top connection upper end is casing threads box, be connected with bunch tube, lower end adopts casing threads to be connected with body, the lower end of described body is casing threads pin thread, is connected with bunch tube.
4. the curved elbow formula of one according to claim 3 is two pushes away hydraulic centralizing device, it is characterized in that: described curved elbow is 4-6 group, adopts and have the production of certain thickness high-quality steel bar, often organize between curved elbow and pass through pinned connection.
5. the curved elbow formula of one according to claim 4 is two pushes away hydraulic centralizing device, it is characterized in that: described hydraulic cylinder and body are fixed by trip bolt.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510718243.3A CN105178882A (en) | 2015-10-29 | 2015-10-29 | Elbow-type dual-thrust hydraulic centralizer |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510718243.3A CN105178882A (en) | 2015-10-29 | 2015-10-29 | Elbow-type dual-thrust hydraulic centralizer |
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| Publication Number | Publication Date |
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| CN105178882A true CN105178882A (en) | 2015-12-23 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510718243.3A Pending CN105178882A (en) | 2015-10-29 | 2015-10-29 | Elbow-type dual-thrust hydraulic centralizer |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109236200A (en) * | 2018-09-28 | 2019-01-18 | 西南石油大学 | A kind of adjustable centralizer of explosion driving |
| 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 |
| CN112746815A (en) * | 2019-10-31 | 2021-05-04 | 中石化石油工程技术服务有限公司 | Controllable righting device for downhole instrument |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4790381A (en) * | 1985-04-11 | 1988-12-13 | Drexel Equipment (U.K.) Limited | Centralizing devices for use in bore-holes |
| US5765640A (en) * | 1996-03-07 | 1998-06-16 | Baker Hughes Incorporated | Multipurpose tool |
| US8365822B2 (en) * | 2009-08-31 | 2013-02-05 | Schlumberger Technology Corporation | Interleaved arm system for logging a wellbore and method for using same |
| CN203796217U (en) * | 2014-04-18 | 2014-08-27 | 中国石油集团渤海钻探工程有限公司 | Compression packer for well cementation |
| CN104405300A (en) * | 2014-11-26 | 2015-03-11 | 中国石油集团西部钻探工程有限公司 | Double-hydraulic-cylinder sleeve hydraulic centralizer |
| CN205089234U (en) * | 2015-10-29 | 2016-03-16 | 中国石油集团渤海钻探工程有限公司 | Two hydraulic centralizer that push away of curved elbow formula |
-
2015
- 2015-10-29 CN CN201510718243.3A patent/CN105178882A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4790381A (en) * | 1985-04-11 | 1988-12-13 | Drexel Equipment (U.K.) Limited | Centralizing devices for use in bore-holes |
| US5765640A (en) * | 1996-03-07 | 1998-06-16 | Baker Hughes Incorporated | Multipurpose tool |
| US8365822B2 (en) * | 2009-08-31 | 2013-02-05 | Schlumberger Technology Corporation | Interleaved arm system for logging a wellbore and method for using same |
| CN203796217U (en) * | 2014-04-18 | 2014-08-27 | 中国石油集团渤海钻探工程有限公司 | Compression packer for well cementation |
| CN104405300A (en) * | 2014-11-26 | 2015-03-11 | 中国石油集团西部钻探工程有限公司 | Double-hydraulic-cylinder sleeve hydraulic centralizer |
| CN205089234U (en) * | 2015-10-29 | 2016-03-16 | 中国石油集团渤海钻探工程有限公司 | Two hydraulic centralizer that push away of curved elbow formula |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109236200A (en) * | 2018-09-28 | 2019-01-18 | 西南石油大学 | A kind of adjustable centralizer of explosion driving |
| CN109236200B (en) * | 2018-09-28 | 2021-04-06 | 西南石油大学 | Adjustable centralizer of explosion drive |
| CN112746815A (en) * | 2019-10-31 | 2021-05-04 | 中石化石油工程技术服务有限公司 | Controllable righting device for downhole instrument |
| 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 |
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