CN213392120U - Rotatable-salvageable ball-throwing fracturing sliding sleeve - Google Patents
Rotatable-salvageable ball-throwing fracturing sliding sleeve Download PDFInfo
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- CN213392120U CN213392120U CN202021784097.7U CN202021784097U CN213392120U CN 213392120 U CN213392120 U CN 213392120U CN 202021784097 U CN202021784097 U CN 202021784097U CN 213392120 U CN213392120 U CN 213392120U
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Abstract
The utility model relates to an oil well completion instrument field. Provides a rotatable salvageable pitching fracturing sliding sleeve and a using method thereof. Including top connection, lower clutch, urceolus and fracturing hole, endotheca and locking piece, open cover and ball seat, salvage anchor, wherein: a plurality of fracturing holes and locking block clamping grooves are arranged on the outer cylinder body, and the inner sleeve can be fixed on the outer cylinder; the inner sleeve is connected with the outer cylinder through the locking block, the top of the inner sleeve is in a spline structure, and the inner sleeve is separated from the outer cylinder by rotating the spline through an inner pipe tool; the bottom of the inner sleeve is connected with a butt-joint anchor through a screw thread, and 3 sliding blocks with slips are uniformly distributed on the butt-joint anchor, so that the next stage of fracturing inner sleeve can be conveniently entered and fished, and the one-time fishing of the multistage fracturing sliding sleeve is realized; the opening sliding sleeve assembly comprises a sealing ring, an opening, a pin and a ball seat, the ball seat is in threaded connection with the bottom of the opening sliding sleeve, and the ball seat and the fracturing ball are in level difference fit. The horizontal well multistage fracturing lower working device is suitable for horizontal well multistage fracturing lower working, normal opening of fracturing holes and cleaning of inner sleeves are achieved, and therefore fracturing working efficiency is improved.
Description
Technical Field
The utility model relates to a rotatable bowling fracturing sliding sleeve and application method who salvages in the oil well completion instrument field is applicable to operation under the multistage fracturing of horizontal well, utilizes to drag for the anchor and will fracture sliding sleeve endotheca rotatory beating and pull out the well, need not to bore the stopper, can realize full latus rectum to guarantee the successful implementation of fracturing technology, improve fracturing operation efficiency, reduce fracturing operation cost.
Background
Along with the development of domestic oil and gas resources, low-permeability oil reservoirs with rich reserves are more and more emphasized, and become a main position for increasing storage and increasing production of various large oil fields. The problem that how to realize effective utilization of reserves and greatly improve the yield of a single well is urgently needed to be solved for developing the low-permeability oil reservoir under the influence of the pore permeability characteristics and the seepage rule of the low-permeability oil reservoir. The horizontal well multistage staged fracturing technology becomes an effective technical means for developing unconventional and low-permeability oil and gas reservoirs. The ball-throwing fracturing technology becomes a key technology of the horizontal well multistage staged fracturing technology due to the characteristics of high tool reliability and simple technology.
At present, the common techniques of the ball-throwing fracturing technology mainly comprise the following steps: firstly, the fracturing ball and the fracturing sliding sleeve are in level difference fit, the inner sleeve can not be salvaged, the inner drift diameter is relatively small or the inner sleeve needs to be drilled, plugged and drilled to remove, and the larger inner drift diameter is established. And secondly, a plurality of fracturing sliding sleeves are opened simultaneously by utilizing a fracturing ball with one specification, the level difference is reduced, the inner drift diameter is increased, and the sliding sleeves and the fracturing ball can not be salvaged. Thirdly, some parts of the tool are made of soluble materials, and can be dissolved automatically after fracturing. Fourthly, the inner sleeve is separated from the outer cylinder by using a special tool, so that the inner sleeve can be fished out of the well.
For example, a multi-cluster infinite well cementation staged fracturing string and a fracturing method (application number: 201510725756.7), a plurality of clusters of fracturing sliding sleeves are opened one by putting a special opening tool, the fracturing stages are not limited, and fracturing at any stage can be realized, but the fracturing sliding sleeves and the special opening tool can not be salvaged. A stepless full-diameter fracturing sliding sleeve (application number: 201820245163. X) has no stepped difference between a fracturing ball and a ball seat, and all the fracturing sliding sleeves can be opened by only throwing the fracturing ball with the same size by utilizing an elastic claw structure. The rotary control stepless ball-throwing fracturing sliding sleeve (patent number: CN 201621073148.9) is used for controlling the rotary sliding sleeve to pull the split claws to rotate different grooves, so that pressure balls pass through, and the purpose of stepless control is achieved. The ball throwing sliding sleeve capable of fishing the ball seats (application number: CN 201810567984) is connected with a horizontal section well completion pipe string in sequence according to the grading of the ball seats, the ball throwing sliding sleeve capable of fishing the ball seats is put into the design position of the ball throwing sliding sleeve in sequence, the ball is thrown in sequence for fracturing construction, a fishing tool is put into a threaded fish top in the well to pull and unlock the ball seat at the uppermost stage and the sliding sleeve and push the ball seat down to the next stage, and the lower end of the ball seat at the upper stage unlocks the ball seat at the lower stage and forms fishing until all the ball seats are unlocked and fish.
In comparison, in order to improve the inner drift diameter of the well completion, increase the production liquid and the operation channel and meet the requirements of repeated fracturing and inner pipe operation of the low-permeability oil reservoir, the best fracturing mode is to fish out the inner sleeve by a special tool.
SUMMERY OF THE UTILITY MODEL
The utility model aims at overcoming the defects of the prior art and providing a fracturing sliding sleeve which is reliable in connection mode of an inner sleeve and an outer sleeve and can be rotationally salvaged and a use method.
The technical scheme is as follows:
the utility model provides a rotatable bowling fracturing sliding sleeve of salvaging, includes urceolus, endotheca, opens sliding sleeve, ball seat, butt joint anchor, bowling, the endotheca, butt joint anchor threaded connection back cover are located in the urceolus, open sliding sleeve, ball seat threaded connection back cover and locate in the endotheca, the endotheca sets firmly in the urceolus through locking block and the locking block draw-in groove that sets up in the urceolus inner wall, be provided with a plurality of fracturing holes on the urceolus, the bowling is arranged in the ball seat.
Furthermore, the top of the inner sleeve is of a spline structure.
Furthermore, 3 sliding blocks with slips are evenly distributed on the butt joint anchor in the circumferential direction.
Furthermore, the ball seat and the fracturing ball are in level difference fit.
Further, the butt joint anchor end is provided with 3 sliders with slips.
Further, the butt-jointed anchor can be screwed and matched with the spline at the top of the inner sleeve.
Furthermore, the fracturing hole is arranged on the outer cylinder section of the ball seat corresponding to the connecting section of the opening sliding sleeve.
Further, an upper joint is arranged at the upper end of the outer barrel.
Further, the lower end of the outer barrel is provided with a lower joint.
Furthermore, the use method of the rotatable salvageable pitching fracturing sliding sleeve comprises the following steps: according to the requirements of well conditions, a plurality of sets of ball throwing fracturing sliding sleeves capable of being rotatably fished are connected through the screwing matching of the butt joint anchor and the inner barrel.
The utility model discloses different with other first ball fracturing sliding sleeves, be a can salvage, the big novel fracturing tool of internal diameter, compare in prior art, this utility model's advantage shows following several:
firstly, an inner sleeve is connected with an outer cylinder through a locking block, the top of the inner sleeve is in a spline structure, and the inner sleeve is separated from the outer cylinder by rotating the spline through an inner pipe tool;
secondly, the tool has simple structure and feasible principle, and is beneficial to supplement the types of the existing ball throwing fracturing tools;
and the action switch of the tool is reliable, so that the risk of the operation of links such as circulation, fracturing, salvaging and the like is reduced.
Drawings
FIG. 1 is a schematic view of a rotatable salvageable pitching fracturing sleeve;
in the figure: 1-upper joint, 2-lower joint, 3-butt joint anchor slide block, 4-inner sleeve spline, 5-fixed locking block and clamping groove, 6-inner sleeve, 7-sealing ring, 8-opening sliding sleeve, 9-outer sleeve fracturing hole, 10-pin, 11-outer sleeve, 12-butt joint anchor, 13-opening sliding sleeve hole, 14-fracturing ball and 15-ball seat;
FIG. 2 is a schematic view of a special tool for fishing the inner sleeve;
in the figure: 16-fishing tool body, 17-fishing anchor slide block and 18-spline rotating strip;
fig. 3 is a schematic view of a spline structure.
Detailed Description
The present invention will be further specifically described with reference to the following specific examples.
The first embodiment is as follows:
a rotatable salvageable pitching fracturing sliding sleeve and a use method thereof. Including top connection, lower clutch, urceolus and fracturing hole, endotheca and locking piece, open cover and ball seat, salvage anchor, wherein: a plurality of fracturing holes and locking block clamping grooves are arranged on the outer cylinder body, and the inner sleeve can be fixed on the outer cylinder; the inner sleeve is connected with the outer cylinder through the locking block, the top of the inner sleeve is in a spline structure, and the inner sleeve is separated from the outer cylinder by rotating the spline through an inner pipe tool; the bottom of the inner sleeve is connected with a butt-joint anchor through a screw thread, and 3 sliding blocks with slips are uniformly distributed on the butt-joint anchor, so that the next stage of fracturing inner sleeve can be conveniently entered and fished, and the one-time fishing of the multistage fracturing sliding sleeve is realized; the opening sliding sleeve assembly comprises a sealing ring, an opening, a pin and a ball seat, the ball seat is in threaded connection with the bottom of the opening sliding sleeve, and the ball seat and the fracturing ball are in level difference fit. The utility model is suitable for an operation under the multistage fracturing of horizontal well realizes normally opening of fracturing hole and cleaing away of endotheca, guarantees the successful implementation of fracturing technology to improve fracturing operation efficiency. The advantages are as follows: the fracturing ball and the ball seat are in level difference fit; the fracturing sliding sleeve inner sleeve is completely fished out of the well by utilizing the fishing anchor without drilling plugs, so that the full drift diameter can be realized.
The above scheme further comprises:
the pitching fracturing sliding sleeve can be combined and applied in a plurality of groups, so that the staged fracturing operation efficiency of horizontal wells and extended reach wells is improved, and the fracturing cost is reduced.
In order to realize the purpose of staged fracturing, the diameters of the openings of the fracturing sliding sleeve ball seats at all stages are different, and the fracturing sliding sleeve ball seats can be matched with fracturing balls with different sizes.
After the well is salvaged to the inside annex of sliding sleeve, can realize that the instrument internal diameter is unanimous with the sleeve pipe internal diameter to improve the success rate of later stage operation greatly.
Example two:
as shown in figure 1, the rotatable salvageable pitching fracturing sliding sleeve and the using method thereof comprise a 1-upper joint, a 2-lower joint, a 3-butt joint anchor sliding block, a 4-inner sleeve spline, a 5-fixed locking block and a clamping groove, a 6-inner sleeve, a 7-sealing ring, an 8-opening sliding sleeve, a 9-outer barrel fracturing hole, a 10-pin, an 11-outer barrel, a 12-butt joint anchor, a 13-opening sliding sleeve hole, a 14-fracturing ball and a 15-ball seat. Wherein: a plurality of fracturing holes 9 and locking block clamping grooves 5 are arranged on the outer cylinder 11, so that the inner sleeve 6 can be fixed on the outer cylinder 11; the inner sleeve 6 is connected with the outer cylinder 11 through the locking block 5, the top of the inner sleeve is in a spline structure 4, and the inner sleeve 6 is separated from the outer cylinder 11 by rotating the spline 4 through an inner pipe tool; the bottom of the inner sleeve 6 is connected with a butt-joint anchor through a screw thread, and 3 sliding blocks 3 with slips are uniformly distributed on the butt-joint anchor, so that the next-stage fracturing inner sleeve can be conveniently entered and fished, and one-time fishing of the multistage fracturing sliding sleeve is realized.
As shown in figure 2, the special tool for fishing the inner sleeve comprises a fishing tool body 16, an anchor fishing sliding block 17 and a spline rotating strip 18. The anchor fishing sliding block 17 can move along the slideway, so that the anchor fishing sliding block is guaranteed to be lifted more and more tightly after fishing; the spline rotating strip 18 is matched with the inner sleeve spline 4, and the inner sleeve is unlocked through rotation.
As shown in fig. 3, a spline structure 19 is located in the inner sleeve 6, and 6 internal groove structures are matched with the spline rotating strip 18.
In the construction process, according to the rotatable salvaging and pitching fracturing sliding sleeve shown in figure 1, multi-stage fracturing can be combined according to well conditions and technical requirements, a plurality of sets of rotatable salvaging and pitching fracturing sliding sleeves are connected, and a casing string is put in; and after the casing string is put in place, operating according to the procedures of well cementation, ball throwing, fracturing, next-stage ball throwing and next-stage fracturing.
The embodiments disclosed herein are to be considered in all respects as illustrative and not restrictive. The above-described embodiments may be omitted, replaced, or modified in various ways without departing from the scope of the appended claims and the gist thereof.
Claims (9)
1. The utility model provides a rotatable bowling fracturing sliding sleeve of salvaging which characterized in that, includes urceolus, endotheca, opens sliding sleeve, ball seat, butt joint anchor, bowling, the endotheca, butt joint anchor threaded connection back cover are located in the urceolus, open sliding sleeve, ball seat threaded connection back cover and locate in the endotheca, the endotheca sets firmly in the urceolus through locking block and the locking block draw-in groove that sets up in the urceolus inner wall, be provided with a plurality of fracturing holes on the urceolus, the bowling is arranged in the ball seat.
2. The rotatable salvageable pitching fracturing sleeve as claimed in claim 1, wherein the top of said inner sleeve is a spline structure.
3. The rotatable salvageable pitching fracturing sliding sleeve according to claim 2, wherein 3 sliding blocks with slips are evenly distributed on the butt anchor in the circumferential direction.
4. The rotatable salvageable pitching fracturing sleeve of claim 3, wherein the ball seat and fracturing ball are in differential fit.
5. The rotatable salvageable pitching fracturing sleeve of claim 4, wherein the butt anchor end is provided with 3 slips.
6. The rotatable salvageable pitching fracturing sleeve of claim 5, wherein the butt anchors are capable of being threadedly engaged with splines on the top of the inner sleeve.
7. The rotatable salvageable pitching fracturing sleeve of claim 6, wherein the fracturing hole is formed in the outer barrel section of the ball seat corresponding to the opening sleeve connecting section.
8. The rotatable fishing pitching fracturing sliding sleeve according to any one of claims 1 to 7, wherein the upper end of the outer barrel is provided with an upper joint.
9. The rotatable salvageable pitching fracturing sleeve as claimed in any one of claims 1 to 7, wherein said outer barrel is provided at its lower end with a lower joint.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021784097.7U CN213392120U (en) | 2020-08-24 | 2020-08-24 | Rotatable-salvageable ball-throwing fracturing sliding sleeve |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021784097.7U CN213392120U (en) | 2020-08-24 | 2020-08-24 | Rotatable-salvageable ball-throwing fracturing sliding sleeve |
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| CN213392120U true CN213392120U (en) | 2021-06-08 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114086936A (en) * | 2020-08-24 | 2022-02-25 | 中国石油化工股份有限公司 | Rotatable salvageable ball injection fracturing sliding sleeve and use method |
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2020
- 2020-08-24 CN CN202021784097.7U patent/CN213392120U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114086936A (en) * | 2020-08-24 | 2022-02-25 | 中国石油化工股份有限公司 | Rotatable salvageable ball injection fracturing sliding sleeve and use method |
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