CN104153751A - Static pressure differential pressure sliding sleeve - Google Patents
Static pressure differential pressure sliding sleeve Download PDFInfo
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- CN104153751A CN104153751A CN201410418124.1A CN201410418124A CN104153751A CN 104153751 A CN104153751 A CN 104153751A CN 201410418124 A CN201410418124 A CN 201410418124A CN 104153751 A CN104153751 A CN 104153751A
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- sliding sleeve
- pressure
- seal
- static pressure
- upper shell
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Abstract
The invention discloses a static pressure differential pressure sliding sleeve. The static pressure differential pressure sliding sleeve comprises a shell and an inner sliding sleeve arranged in the shell. The inner sliding sleeve axially slides in the shell. The shell comprises an upper shell body and a lower shell body. The top of the inner sliding sleeve is provided with at least one overflow hole. The sidewall of the inner sliding sleeve is provided with a constant pressure valve and a sliding sleeve boss. The constant pressure valve is arranged on the sidewall of the inner sliding sleeve and located below the upper shell body. The sliding sleeve boss is arranged below the constant pressure valve. A first sealing part is arranged between the upper shell body and the lower shell body. A second sealing part is arranged between the sliding sleeve boss and the lower shell body. The static pressure differential pressure sliding sleeve can not be affected by cement in the well cementing and fracturing process, and the well cementing process has no influence on work of the static pressure differential pressure sliding sleeve.
Description
Technical field
The present invention relates to the sliding bush apparatus technical field of oil-gas field fracturing completion practice staged fracturing, especially a kind of static pressure pressure reduction sliding sleeve.
Background technology
Along with the exploration and development of the oil-gas reservoir transfer to directions such as compactness oil gas field, shale gas reservoirs, fracturing technique is a kind of indispensable technological means.Utilize fracturing technique to compactness oil-gas reservoir transform, thereby realize the high yield of oil gas field.This has been proved to be a feasible technology path.Along with constantly carrying out of exploitation, fracturing technique and fracturing technology have been proposed to more and more higher requirement.
Well cementation fracturing technique starts to study and apply as a kind of novel fracturing technology.This kind of technique is different from conventional bore hole staged fracturing technology, does not need a large amount of open hole packers to separate stratum, but relies on the mode of the outer well cementation of sleeve pipe, realizes and separating, and can, for formation at target locations, realize pinpoint pressure break.Especially at water layer and oil reservoir, intersect the region existing, can be at good packing water layer, and can accurately pressure break formation at target locations, realize the target of high yield.
Existing pressure reduction sliding sleeve, be mainly used in conventional bore hole Fracturing Technology of not cementing the well, its operating principle is to rely on the upper and lower pressure reduction area of sliding sleeve inner sleeve different, thereby fluid pressure reaches after certain numerical value in sleeve pipe, can produce pressure differential, thereby shear pin, the action of promotion inner sleeve, opens sliding sleeve thereby realize, and links up the object on stratum.But this pressure reduction sliding sleeve, in order to prevent that the existence of liquid lock from can offer opening, is communicated with outside thereby realize.Yet, if be used in well cementation fracturing technique, will be in well cementing process, cement enters in inner sliding sleeve and housing, thereby causes inner sliding sleeve and cannot move, and affects the carrying out of whole construction technology.
Therefore, need to invent a kind of novel static pressure pressure reduction sliding sleeve.
Summary of the invention
The object of this invention is to provide a kind of Novel static pressure and defeat poor sliding sleeve, overcome shortcoming above, prevent that cementing concrete is dead by sliding sleeve in the process of well cementation, and cannot complete corresponding action.Described static pressure pressure reduction slides over G.I.H, and after normal well cementation, the pressure in tube post is opened sliding sleeve, links up stratum.
The object of the invention to solve the technical problems realizes by the following technical solutions.
By a kind of static pressure pressure reduction sliding sleeve, comprise housing and be arranged on the inner sliding sleeve in described housing, described inner sliding sleeve endwisely slips in described housing; Described housing comprises upper shell and lower house; At the top of described inner sliding sleeve, be provided with at least one flowing hole; On the sidewall of described inner sliding sleeve, be provided with constant pressure valve and sliding sleeve boss, described constant pressure valve is arranged on the sidewall of the described inner sliding sleeve below described upper shell, and described sliding sleeve boss is arranged on described constant pressure valve below; Between described upper shell and described lower house, be provided with the first seal, between described sliding sleeve boss and described lower house, be provided with the second seal.
Preferably, described upper shell and described lower house are through being threaded.
Preferably, described upper shell is fixedly connected with through static determinacy screw with described lower house.
Preferably, in described flowing hole, be provided with full-bodied grease.
Preferably, described lower house lower end is provided with positive stop lug boss, between described inner sliding sleeve and described positive stop lug boss, is provided with spacing back-up ring.
Preferably, on described lower house, be provided with stopper slot, for coordinating with described spacing back-up ring.
Preferably, between described inner sliding sleeve and described positive stop lug boss, be also provided with the 3rd seal.
Preferably, described the 3rd seal is arranged on described spacing back-up ring top.
Preferably, be provided with pressure break hole on described upper shell, be respectively equipped with the 4th seal and the 5th seal in the inner side of described upper shell, described the 4th seal and the 5th seal are separately positioned on the both sides up and down in described pressure break hole.
By technique scheme, a kind of static pressure pressure reduction sliding sleeve that the present invention proposes at least has following advantages:
1) static pressure pressure reduction sliding sleeve disclosed in this invention, by the setting of constant pressure valve, can make static pressure pressure reduction slide under setting pressure condition and just can open, thereby can not open in advance static pressure pressure reduction sliding sleeve, has improved the safety of static pressure pressure reduction sliding sleeve.
2) static pressure pressure reduction sliding sleeve disclosed in this invention is not subject to the impact of cement in well cementation pressure break, and the process of well cementation can not affect the work of static pressure pressure reduction sliding sleeve.
3) static pressure pressure reduction sliding sleeve disclosed in this invention also can be used in conventional bore hole fracturing technology and use.
Above-mentioned explanation is only the general introduction of technical solution of the present invention, in order to better understand technological means of the present invention, and can be implemented according to the content of manual, below with preferred embodiment of the present invention and coordinate accompanying drawing to be described in detail as follows.
Accompanying drawing explanation
Fig. 1 is the structural representation of static pressure pressure reduction sliding sleeve of the present invention;
Fig. 2 is the structural representation of static pressure pressure reduction sliding sleeve inner sliding sleeve downslide process of the present invention.
The specific embodiment
For further setting forth the present invention, reach technological means and the effect that predetermined goal of the invention is taked, below in conjunction with accompanying drawing and preferred embodiment, the specific embodiment, structure, feature and effect thereof to a kind of static pressure pressure reduction sliding sleeve proposing according to the present invention, be described in detail as follows.In following explanation, the not necessarily same embodiment that different " embodiment " or " embodiment " refer to.In addition, special characteristic, structure or the feature in one or more embodiment can be combined by any suitable form.
A kind of static pressure pressure reduction sliding sleeve as depicted in figs. 1 and 2, comprises housing and is arranged on the inner sliding sleeve 2 in described housing, described inner sliding sleeve 2 endwisely slips in described housing; Described housing comprises upper shell 1 and lower house 4; Top at described inner sliding sleeve 2 is provided with flowing hole; On the sidewall of described inner sliding sleeve 2, be provided with constant pressure valve 5 and sliding sleeve boss 7, described constant pressure valve 5 is arranged on the sidewall of described inner sliding sleeve 2 of described upper shell 1 below, and described sliding sleeve boss 7 is arranged on described constant pressure valve below; Between described upper shell 1 and described lower house 4, be provided with the first seal 11, between described sliding sleeve boss 7 and described lower house 4, be provided with the second seal 12.
The sidewall of described upper shell 1, lower house 4, inner sliding sleeve 2 and sliding sleeve boss 7 forms the first airtight cavities, and described constant pressure valve 5 is arranged on the wall of described airtight cavity (being on the sidewall of inner sliding sleeve 2).Described sliding sleeve boss 7, inner sliding sleeve 2 sidewalls and lower house 4 form the second airtight cavity.Wherein, inner sliding sleeve 2 has inner chamber, the static pressure pressure reduction sliding sleeve of the present embodiment in the course of the work, first in the inner chamber from ground to inner sliding sleeve 2, pump into high-pressure fluid, described constant pressure valve 5 is opened under preset pressure condition, after described constant pressure valve 5 is opened, fluid is flowed in described the first airtight cavity by elongated orifices 17 by constant pressure valve 5, and be air in the second airtight cavity of described sliding sleeve boss 7 belows, on identical area, the two ends up and down of sliding sleeve boss 7 produce pressure differential, thereby can promote described inner sliding sleeve 2 moves downward, thereby realize, open static pressure pressure reduction sliding sleeve, to realize, link up stratum, realize the object of pressure break.
By the setting of described constant pressure valve 5, can make described static pressure pressure reduction slide under setting pressure condition and just can open, thereby can not open in advance described static pressure pressure reduction sliding sleeve, the safety that has improved described static pressure pressure reduction sliding sleeve.
Described static pressure pressure reduction sliding sleeve is not subject to the impact of cement in well cementation pressure break, can normally open use.Meanwhile, described static pressure pressure reduction sliding sleeve also can be used in conventional bore hole fracturing technology.
Preferably, the number of described flowing hole is at least one.
Preferably, described constant pressure valve 5 has a setting that meets field requirement to open force value.In the present embodiment, by suppressing in described inner sliding sleeve 2 from ground, when force value reaches constant pressure valve, set while opening force value, described constant pressure valve 5 is opened, and fluid flows in described the first airtight cavity, thereby, promote described inner sliding sleeve 2 descending.
Preferably, described upper shell 1 and described lower house 4 are through being threaded.
Selectively, described upper shell 1 is fixedly connected with through static determinacy screw 3 with described lower house 4.
Selectively, after described upper shell 1 and described lower house 4 are threaded connection, then be fixedly connected with by described static determinacy screw 3, thereby make the connected mode of described upper shell 1 and described lower house 4 firmer.
Preferably, in described flowing hole, be provided with full-bodied grease, play the effect of isolation cement, thereby guarantee that cement can not enter in the gap between described housing and inner sliding sleeve 2.
Preferably, described lower house 4 lower ends are provided with positive stop lug boss 8, are provided with spacing back-up ring 6 between described inner sliding sleeve 2 and described positive stop lug boss 8.
Preferably, on described lower house 4, be provided with stopper slot, for coordinating with described spacing back-up ring 6.Spacing back-up ring 6 moves to stopper slot place and can eject, and prevents from moving on described inner sliding sleeve 2, guarantees the opening of circulation passage.
Preferably, between described inner sliding sleeve 2 and described positive stop lug boss 8, be also provided with the 3rd seal 13.
Preferably, described the 3rd seal 13 is arranged on described spacing back-up ring 6 tops.
Preferably, on described upper shell 1, be provided with pressure break hole, be respectively equipped with the 4th seal 14 and the 5th seal 15 in the inner side of described upper shell 1, described the 4th seal 14 and the 5th seal 15 are separately positioned on the both sides up and down in described pressure break hole.When reality is used, rely on the acting in conjunction of seal and high viscosity grease, cementing concrete can not enter into the gap of sliding sleeve component, and after theing cement solidifies, described static pressure pressure reduction sliding sleeve remains sealing.
Concrete implementation process, first described constant pressure valve 5, described the first seal 11, described the second seal 12, described the 3rd seal 13 assemblings, described the 4th seal 14 are assembled to respectively to the relevant position on described inner sliding sleeve 2 to, described the 5th seal 15, then, the sealing shroud that is equipped with constant pressure valve 5 and seal is packed in described upper shell 1, again described inner sliding sleeve 2 lower ends are inserted in described lower house 4, and described lower house 4 is fixed and is connected with described upper shell 1.Thereby, complete the whole assembling process of described static pressure pressure reduction sliding sleeve.
The above, it is only preferred embodiment of the present invention, not the present invention is done to any pro forma restriction, any simple modification, equivalent variations and the modification above embodiment done according to technical spirit of the present invention, all still belong in the scope of technical solution of the present invention.
Claims (9)
1. a static pressure pressure reduction sliding sleeve, is characterized in that, comprises housing and is arranged on the inner sliding sleeve in described housing, and described inner sliding sleeve endwisely slips in described housing;
Described housing comprises upper shell and lower house;
At the top of described inner sliding sleeve, be provided with at least one flowing hole;
On the sidewall of described inner sliding sleeve, be provided with constant pressure valve and sliding sleeve boss, described constant pressure valve is arranged on the sidewall of the described inner sliding sleeve below described upper shell, and described sliding sleeve boss is arranged on described constant pressure valve below;
Between described upper shell and described lower house, be provided with the first seal, between described sliding sleeve boss and described lower house, be provided with the second seal.
2. static pressure pressure reduction sliding sleeve according to claim 1, is characterized in that,
Described upper shell and described lower house are through being threaded.
3. static pressure pressure reduction sliding sleeve according to claim 1, is characterized in that,
Described upper shell is fixedly connected with through static determinacy screw with described lower house.
4. static pressure pressure reduction sliding sleeve according to claim 1, is characterized in that,
In described flowing hole, be provided with full-bodied grease.
5. static pressure pressure reduction sliding sleeve according to claim 1, is characterized in that,
Described lower house lower end is provided with positive stop lug boss, between described inner sliding sleeve and described positive stop lug boss, is provided with spacing back-up ring.
6. static pressure pressure reduction sliding sleeve according to claim 5, is characterized in that,
On described lower house, be provided with stopper slot, for coordinating with described spacing back-up ring.
7. static pressure pressure reduction sliding sleeve according to claim 5, is characterized in that,
Between described inner sliding sleeve and described positive stop lug boss, be also provided with the 3rd seal.
8. static pressure pressure reduction sliding sleeve according to claim 7, is characterized in that,
Described the 3rd seal is arranged on described spacing back-up ring top.
9. static pressure pressure reduction sliding sleeve according to claim 1, is characterized in that,
On described upper shell, be provided with pressure break hole, be respectively equipped with the 4th seal and the 5th seal in the inner side of described upper shell, described the 4th seal and the 5th seal are separately positioned on the both sides up and down in described pressure break hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410418124.1A CN104153751B (en) | 2014-08-22 | 2014-08-22 | A kind of static pressure pressure reduction sliding sleeve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410418124.1A CN104153751B (en) | 2014-08-22 | 2014-08-22 | A kind of static pressure pressure reduction sliding sleeve |
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| Publication Number | Publication Date |
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| CN104153751A true CN104153751A (en) | 2014-11-19 |
| CN104153751B CN104153751B (en) | 2016-06-29 |
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| CN201410418124.1A Active CN104153751B (en) | 2014-08-22 | 2014-08-22 | A kind of static pressure pressure reduction sliding sleeve |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107923233A (en) * | 2015-06-19 | 2018-04-17 | 基尔格工具有限责任公司 | Circulating valve |
| CN110284852A (en) * | 2019-08-02 | 2019-09-27 | 思达斯易能源技术(集团)有限公司 | A kind of multi-functional formation testing packer |
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| US4475599A (en) * | 1981-05-01 | 1984-10-09 | Baker International Corporation | Valve for subterranean wells |
| CN201420536Y (en) * | 2009-06-08 | 2010-03-10 | 阜新市石油工具厂 | Well completion sliding sleeve fracturing valve |
| CN102071911A (en) * | 2010-12-17 | 2011-05-25 | 中国石油集团长城钻探工程有限公司 | External pressure difference opening circulating valve |
| CN202731841U (en) * | 2012-06-01 | 2013-02-13 | 中国石油天然气股份有限公司 | Controllable differential pressure type sliding sleeve |
| CN203308447U (en) * | 2013-06-09 | 2013-11-27 | 中国石油化工股份有限公司 | Intelligent electric switch sliding sleeve |
| CN204060660U (en) * | 2014-08-22 | 2014-12-31 | 安东石油技术（集团）有限公司 | A kind of static pressure pressure reduction sliding sleeve |
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2014
- 2014-08-22 CN CN201410418124.1A patent/CN104153751B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4475599A (en) * | 1981-05-01 | 1984-10-09 | Baker International Corporation | Valve for subterranean wells |
| CN201420536Y (en) * | 2009-06-08 | 2010-03-10 | 阜新市石油工具厂 | Well completion sliding sleeve fracturing valve |
| CN102071911A (en) * | 2010-12-17 | 2011-05-25 | 中国石油集团长城钻探工程有限公司 | External pressure difference opening circulating valve |
| CN202731841U (en) * | 2012-06-01 | 2013-02-13 | 中国石油天然气股份有限公司 | Controllable differential pressure type sliding sleeve |
| CN203308447U (en) * | 2013-06-09 | 2013-11-27 | 中国石油化工股份有限公司 | Intelligent electric switch sliding sleeve |
| CN204060660U (en) * | 2014-08-22 | 2014-12-31 | 安东石油技术（集团）有限公司 | A kind of static pressure pressure reduction sliding sleeve |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107923233A (en) * | 2015-06-19 | 2018-04-17 | 基尔格工具有限责任公司 | Circulating valve |
| US10745996B2 (en) | 2015-06-19 | 2020-08-18 | Drlg Tools, Llc | Circulation valve |
| CN110284852A (en) * | 2019-08-02 | 2019-09-27 | 思达斯易能源技术(集团)有限公司 | A kind of multi-functional formation testing packer |
| CN110284852B (en) * | 2019-08-02 | 2024-01-09 | 思达斯易能源技术(集团)有限公司 | Multifunctional oil testing packer |
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| CN104153751B (en) | 2016-06-29 |
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Effective date of registration: 20190107 Address after: 300450 No. 309, Second Street, Central and South China, West Binhai New Area, Tianjin Patentee after: Tianjin An Dong petroleum machinery Manufacturing Co., Ltd Address before: 100102 No. 8 Pingcui West Road, Donghuqu, Chaoyang District, Beijing Patentee before: Anton Oilfield Services (Group) Ltd. |
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