CN203626793U - Reliable differential pressure sliding sleeve - Google Patents
Reliable differential pressure sliding sleeve Download PDFInfo
- Publication number
- CN203626793U CN203626793U CN201320806481.6U CN201320806481U CN203626793U CN 203626793 U CN203626793 U CN 203626793U CN 201320806481 U CN201320806481 U CN 201320806481U CN 203626793 U CN203626793 U CN 203626793U
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- sliding sleeve
- top connection
- sleeve
- inner sliding
- pressure break
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Abstract
The utility model relates to the technical field of a differential pressure sliding sleeve and concretely relates to a reliable differential pressure sliding sleeve comprising an upper joint, an internal sliding sleeve, a connecting casing pipe, a first shearing pin and a second shearing pin. At least one fracture side hole is distributed on the upper part periphery of the upper joint; the internal sliding sleeve sealing the fracture side hole is arranged in the upper joint via the first shearing pin; the inner side of the lower end of the upper joint is provided with the lower joint via the second shearing pin; the external upper side of the upper joint is provided with a sliding sleeve external boss capable of sealing the fracture side hole; the middle part of the external annular surface of the sliding sleeve external boss is respectively provided with an opening ring installation groove; and a check opening ring is disposed in the opening ring installation groove. The reliable differential pressure sliding sleeve is simply structured with compactness and convenient usage; after the first shearing pin loses efficacy, the second shearing pin can be cut off via pressure increase; a fracture pipeline is opened when the lower joint brakes away from the upper joint; high reliability is provided; opening pressure is reduced; the fracture pipeline can be smoothly opened via pressure increase; and the reliable differential pressure sliding sleeve possesses great stability and safety.
Description
Technical field
the utility model relates to pressure reduction sliding sleeve technical field, is a kind of reliable formula pressure reduction sliding sleeve.
Background technology
adopt and point adopt, control in the construction operation processes such as water blocking water, reservoir reconstruction the exceptional wells such as Multilateral Wells mixed, often need to carry out separate stratum fracfturing to horizontal well or Multilateral Wells master, branch well hole different reservoir; With regard to staged fracturing technology, the existing main pressure break mode using adds sliding sleeve fracturing technical matters for packer; An indispensable technical requirements of this technique is used pressure reduction sliding sleeve exactly, pumps into high-pressure fluid sliding sleeve is opened by ground, and high-pressure fluid enters oil reservoir rock and carries out pressure break; And current used pressure reduction sliding sleeve easily cannot open sliding sleeve because shear pin lost efficacy, poor reliability; In the case, by increasing down-hole pressure, although can make to a certain extent part sliding sleeve open, also there is the possibility that cannot open, poor stability; Simultaneously excessive because of opening pressure, the setting ball valve in down-hole is easily affected, and has certain potential safety hazard, affects carrying out smoothly of pressure break work.
Summary of the invention
the utility model provides a kind of reliable formula pressure reduction sliding sleeve, has overcome the deficiency of above-mentioned prior art, and it can effectively solve pressure reduction sliding sleeve easily cannot open sliding sleeve because shear pin loses efficacy, and opening pressure is large, has the problem of potential safety hazard.
the technical solution of the utility model realizes by following measures: a kind of reliable formula pressure reduction sliding sleeve, comprises top connection, inner sliding sleeve, splicing sleeve, the first shear pin, the second shear pin; There is at least one pressure break side opening in the top of top connection circle distribution, in top connection, be provided with the inner sliding sleeve of pressure break side opening shutoff by the first shear pin; Inner side, lower end in top connection is provided with lower contact by the second shear pin.
the further optimization and/or improvements to above-mentioned utility model technical scheme below:
the outer upper of above-mentioned top connection can have the sliding sleeve outer lug boss of pressure break side opening shutoff; Outer ring surface middle part in sliding sleeve outer lug boss is respectively equipped with split ring mounting groove, and non-return split ring is installed in split ring mounting groove; Have respectively in the lower inside of top connection that Open Side Down and move spacing split ring stopper slot for inner sliding sleeve; Between split ring stopper slot and the bottom of inner sliding sleeve, form annular compression chamber; In the top connection corresponding with compression chamber, there is spout hole; Inner side, lower end in top connection is installed with splicing sleeve, and the lower end of inner sliding sleeve is sleeved in splicing sleeve; Lower contact upper end is arranged in the bottom of splicing sleeve by the second shear pin.
internal thread can be arranged respectively at the bottom of above-mentioned split ring stopper slot, and the upper end of splicing sleeve is fixedly mounted in one-level compression chamber by screw thread; The holding screw of anti-rotation is installed between the lower end of top connection and splicing sleeve.
in the top connection of above-mentioned inner sliding sleeve upper end, can there is sliding sleeve location inner convex platform; Or/and, being intervally distributed with two rows' pressure break side opening from top to bottom on the top of top connection, two rows' pressure break side openings are cross-distribution; Every package is drawn together six pressure break side openings circumference uniform distribution in top connection.
the upside of above-mentioned top connection can have the conical internal thread that is wide at the top and narrow at the bottom, and the downside of lower contact has the conical external screw thread that is wide at the top and narrow at the bottom.Can be convenient to like this utility model is connected with other downhole hardwares.
between the inner sliding sleeve of above-mentioned pressure break side opening top and top connection, be installed with sealing ring; Between the lower end of inner sliding sleeve and splicing sleeve, be installed with sealing ring.
the utility model reasonable and compact in structure, easy to use; After the first shear pin lost efficacy, can be by supercharging, the second shear pin is cut off, depart from top connection and make the unlatching of pressure break passage by lower contact, reliability is high; Reduce opening pressure, after supercharging, make pressure break passage open smoothly, stability and safe.
Accompanying drawing explanation
the master that accompanying drawing 1 is the utility model most preferred embodiment looks sectional structure schematic diagram.
coding in accompanying drawing is respectively: 1 is top connection, and 2 is inner sliding sleeve, and 3 is sliding sleeve outer lug boss, 4 is pressure break side opening, and 5 is the first shear pin, and 6 is non-return split ring, 7 is compression chamber, 8 is spout hole, and 9 is splicing sleeve, and 10 is the second shear pin, 11 is lower contact, 12 is sliding sleeve location inner convex platform, and 13 is holding screw, and 14 is sealing ring.
The specific embodiment
the utility model is not subject to the restriction of following embodiment, can determine concrete embodiment according to the technical solution of the utility model and actual conditions.
in the utility model, for convenience of description, the description of the relative position relation of each parts is to be all described according to the Butut mode of Figure of description 1, as: the position relationship of upper and lower, left and right etc. is to determine according to the Butut direction of Figure of description 1.
below in conjunction with embodiment and accompanying drawing, the utility model is further described:
as shown in Figure 1, this reliable formula pressure reduction sliding sleeve comprises top connection 1, inner sliding sleeve 2, splicing sleeve 9, the first shear pin 5, the second shear pin 10; There is at least one pressure break side opening 4 in the top of top connection 1 circle distribution, in top connection 1, be provided with the inner sliding sleeve 2 of pressure break side opening 4 shutoff by the first shear pin 5; Inner side, lower end in top connection 1 is provided with lower contact 11 by the second shear pin 10.To the pressure of spraining of pitching in well, the high-pressure fluid of down-hole enters in top connection 1, the pressure-acting of high-pressure fluid is in inner sliding sleeve 2 and lower contact 11, impose on inner sliding sleeve 2 and the downward thrust of lower contact 11, the first shear pin 5 is cut off, drive inner sliding sleeve 2 to move down, now pressure break side opening 4 is opened, and pressure break passage is normally opened; In the time that the first shear pin 5 cannot be cut off because of inefficacy, continuing increases down-hole pressure, until the second shear pin 10 is cut off, departs from top connection 1 pressure break passage is opened by lower contact 11, and reliability is high; Replace original mode that increases opening pressure and by pressure break side opening 4, pressure break passage is opened that only relies on simultaneously, reduced to a certain extent opening pressure; Guarantee to make pressure break passage to open smoothly after supercharging, stability and safe simultaneously.
can according to actual needs, above-mentioned pressure reduction sliding sleeve be made further optimization and/or improvements:
as shown in Figure 1, have the sliding sleeve outer lug boss 3 of pressure break side opening 4 shutoff in the outer upper of top connection 1; Outer ring surface middle part in sliding sleeve outer lug boss 3 is respectively equipped with split ring mounting groove, and non-return split ring 6 is installed in split ring mounting groove; Have respectively in the lower inside of top connection 1 that Open Side Down and move spacing split ring stopper slot for inner sliding sleeve; Between the bottom of split ring stopper slot and inner sliding sleeve 2, form annular compression chamber 7; In the top connection 1 corresponding with compression chamber 7, there is spout hole 8; Inner side, lower end in top connection 1 is installed with splicing sleeve 9, and the lower end of inner sliding sleeve 2 is sleeved in splicing sleeve 9; Lower contact 11 upper ends are arranged in the bottom of splicing sleeve 9 by the second shear pin 10.In the time that inner sliding sleeve 2 drives non-return split ring 6 to come downwards to split ring stopper slot, non-return split ring 6 radially opens and is stuck in the upper surface of split ring stopper slot, makes inner sliding sleeve 2 spacing; Prevent that inner sliding sleeve 2 from resetting, make pressure break passage remain opening.
as shown in Figure 1, internal thread is arranged respectively at the bottom of split ring stopper slot, and the upper end of splicing sleeve 9 is fixedly mounted in one-level compression chamber 7 by screw thread; The holding screw 13 of anti-rotation is installed between the lower end of top connection 1 and splicing sleeve 9.Be threaded and can be convenient to the dismounting between top connection 1 and splicing sleeve 9, easy to use; Holding screw 13 can prevent rotation dropout.
as shown in Figure 1, in the top connection 1 of inner sliding sleeve 2 upper ends, there is sliding sleeve location inner convex platform 12.Can be convenient to like this inner sliding sleeve 2 location is installed, easy for installation.
as shown in Figure 1, the pressure break side opening 4 that is intervally distributed with two rows' pressure break side opening 4, two row from top to bottom on the top of top connection 1 is cross-distribution; Every package is drawn together six pressure break side openings 4 circumference uniform distribution in top connection 1.
as shown in Figure 1, the upside of top connection 1 has the conical internal thread that is wide at the top and narrow at the bottom, and the downside of lower contact 11 has the conical external screw thread that is wide at the top and narrow at the bottom.Can be convenient to like this utility model is connected with other downhole hardwares.
as shown in Figure 1, between the inner sliding sleeve 2 of pressure break side opening 4 tops and top connection 1, be installed with sealing ring 14; Between the lower end of inner sliding sleeve 2 and splicing sleeve 9, be installed with sealing ring 14.Sealing ring 14 plays the effect that increases contact surface sealing.
above technical characterictic has formed most preferred embodiment of the present utility model, and it has stronger compliance and best implementation result, can increase and decrease according to actual needs non-essential technical characterictic, meets the demand of different situations.
Claims (10)
1. a reliable formula pressure reduction sliding sleeve, is characterized in that comprising top connection, inner sliding sleeve, splicing sleeve, the first shear pin, the second shear pin; There is at least one pressure break side opening in the top of top connection circle distribution, in top connection, be provided with the inner sliding sleeve of pressure break side opening shutoff by the first shear pin; Inner side, lower end in top connection is provided with lower contact by the second shear pin.
2. reliable formula pressure reduction sliding sleeve according to claim 1, is characterized in that the outer upper of top connection has the sliding sleeve outer lug boss of pressure break side opening shutoff; Outer ring surface middle part in sliding sleeve outer lug boss is respectively equipped with split ring mounting groove, and non-return split ring is installed in split ring mounting groove; Have respectively in the lower inside of top connection that Open Side Down and move spacing split ring stopper slot for inner sliding sleeve; Between split ring stopper slot and the bottom of inner sliding sleeve, form annular compression chamber; In the top connection corresponding with compression chamber, there is spout hole; Inner side, lower end in top connection is installed with splicing sleeve, and the lower end of inner sliding sleeve is sleeved in splicing sleeve; Lower contact upper end is arranged in the bottom of splicing sleeve by the second shear pin.
3. reliable formula pressure reduction sliding sleeve according to claim 2, is characterized in that internal thread is arranged respectively at the bottom of split ring stopper slot, and the upper end of splicing sleeve is fixedly mounted in one-level compression chamber by screw thread; The holding screw of anti-rotation is installed between the lower end of top connection and splicing sleeve.
4. according to the reliable formula pressure reduction sliding sleeve described in claim 1 or 2 or 3, it is characterized in that there is sliding sleeve location inner convex platform in the top connection of inner sliding sleeve upper end; Or/and, being intervally distributed with two rows' pressure break side opening from top to bottom on the top of top connection, two rows' pressure break side openings are cross-distribution; Every package is drawn together six pressure break side openings circumference uniform distribution in top connection.
5. according to the reliable formula pressure reduction sliding sleeve described in claim 1 or 2 or 3, it is characterized in that the upside of top connection has the conical internal thread that is wide at the top and narrow at the bottom, the downside of lower contact has the conical external screw thread that is wide at the top and narrow at the bottom.
6. reliable formula pressure reduction sliding sleeve according to claim 4, is characterized in that the upside of top connection has the conical internal thread that is wide at the top and narrow at the bottom, and the downside of lower contact has the conical external screw thread that is wide at the top and narrow at the bottom.
7. according to the reliable formula pressure reduction sliding sleeve described in claim 1 or 2 or 3, it is characterized in that being installed with sealing ring between the inner sliding sleeve of pressure break side opening top and top connection; Between the lower end of inner sliding sleeve and splicing sleeve, be installed with sealing ring.
8. reliable formula pressure reduction sliding sleeve according to claim 4, is characterized in that being installed with sealing ring between the inner sliding sleeve of pressure break side opening top and top connection; Between the lower end of inner sliding sleeve and splicing sleeve, be installed with sealing ring.
9. reliable formula pressure reduction sliding sleeve according to claim 5, is characterized in that being installed with sealing ring between the inner sliding sleeve of pressure break side opening top and top connection; Between the lower end of inner sliding sleeve and splicing sleeve, be installed with sealing ring.
10. reliable formula pressure reduction sliding sleeve according to claim 6, is characterized in that being installed with sealing ring between the inner sliding sleeve of pressure break side opening top and top connection; Between the lower end of inner sliding sleeve and splicing sleeve, be installed with sealing ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320806481.6U CN203626793U (en) | 2013-12-10 | 2013-12-10 | Reliable differential pressure sliding sleeve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320806481.6U CN203626793U (en) | 2013-12-10 | 2013-12-10 | Reliable differential pressure sliding sleeve |
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| Publication Number | Publication Date |
|---|---|
| CN203626793U true CN203626793U (en) | 2014-06-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320806481.6U Expired - Fee Related CN203626793U (en) | 2013-12-10 | 2013-12-10 | Reliable differential pressure sliding sleeve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203626793U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106522881A (en) * | 2016-12-07 | 2017-03-22 | 中国石油集团西部钻探工程有限公司 | Downhole isolating valve |
| CN106907146A (en) * | 2017-04-19 | 2017-06-30 | 中国电建集团中南勘测设计研究院有限公司 | One kind control valve and hydrofracturing geodetic stress test device |
| CN110905423A (en) * | 2019-12-18 | 2020-03-24 | 西南石油大学 | Double-gradient drilling string safety control device without marine riser |
| WO2022127155A1 (en) * | 2020-12-17 | 2022-06-23 | 中国石油化工股份有限公司 | Downhole blowout preventer and blowout prevention operation method |
-
2013
- 2013-12-10 CN CN201320806481.6U patent/CN203626793U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106522881A (en) * | 2016-12-07 | 2017-03-22 | 中国石油集团西部钻探工程有限公司 | Downhole isolating valve |
| CN106907146A (en) * | 2017-04-19 | 2017-06-30 | 中国电建集团中南勘测设计研究院有限公司 | One kind control valve and hydrofracturing geodetic stress test device |
| CN106907146B (en) * | 2017-04-19 | 2023-04-07 | 中国电建集团中南勘测设计研究院有限公司 | Control valve and hydrofracturing geodesic stress test device |
| CN110905423A (en) * | 2019-12-18 | 2020-03-24 | 西南石油大学 | Double-gradient drilling string safety control device without marine riser |
| WO2022127155A1 (en) * | 2020-12-17 | 2022-06-23 | 中国石油化工股份有限公司 | Downhole blowout preventer and blowout prevention operation method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140604 Termination date: 20201210 |