CN114837613A - Sand control fracturing ball injection sliding sleeve - Google Patents
Sand control fracturing ball injection sliding sleeve Download PDFInfo
- Publication number
- CN114837613A CN114837613A CN202210514418.9A CN202210514418A CN114837613A CN 114837613 A CN114837613 A CN 114837613A CN 202210514418 A CN202210514418 A CN 202210514418A CN 114837613 A CN114837613 A CN 114837613A
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- China
- Prior art keywords
- sliding sleeve
- sand control
- ball seat
- fracturing
- inner sliding
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- 239000004576 sand Substances 0.000 title claims abstract description 234
- 238000002347 injection Methods 0.000 title claims description 16
- 239000007924 injection Substances 0.000 title claims description 16
- 238000007789 sealing Methods 0.000 claims abstract description 59
- 238000004519 manufacturing process Methods 0.000 claims abstract description 49
- 238000010008 shearing Methods 0.000 claims abstract description 35
- 239000011148 porous material Substances 0.000 claims abstract description 15
- 238000001914 filtration Methods 0.000 claims description 9
- 230000002265 prevention Effects 0.000 claims description 8
- 239000011049 pearl Substances 0.000 claims description 4
- 229910001018 Cast iron Inorganic materials 0.000 claims description 3
- 230000006835 compression Effects 0.000 claims description 3
- 238000007906 compression Methods 0.000 claims description 3
- 239000007769 metal material Substances 0.000 claims description 3
- 230000003044 adaptive effect Effects 0.000 claims description 2
- 239000004744 fabric Substances 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 13
- 238000010276 construction Methods 0.000 description 11
- 238000009434 installation Methods 0.000 description 7
- 239000011324 bead Substances 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 229910000851 Alloy steel Inorganic materials 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 238000012216 screening Methods 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 210000005069 ears Anatomy 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 229910000990 Ni alloy Inorganic materials 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 239000003129 oil well Substances 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 239000003079 shale oil Substances 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001256 stainless steel alloy Inorganic materials 0.000 description 1
- 230000000638 stimulation Effects 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Images
Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B34/00—Valve arrangements for boreholes or wells
- E21B34/06—Valve arrangements for boreholes or wells in wells
- E21B34/14—Valve arrangements for boreholes or wells in wells operated by movement of tools, e.g. sleeve valves operated by pistons or wire line tools
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B34/00—Valve arrangements for boreholes or wells
- E21B34/06—Valve arrangements for boreholes or wells in wells
- E21B34/14—Valve arrangements for boreholes or wells in wells operated by movement of tools, e.g. sleeve valves operated by pistons or wire line tools
- E21B34/142—Valve arrangements for boreholes or wells in wells operated by movement of tools, e.g. sleeve valves operated by pistons or wire line tools unsupported or free-falling elements, e.g. balls, plugs, darts or pistons
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/02—Subsoil filtering
- E21B43/08—Screens or liners
- E21B43/086—Screens with preformed openings, e.g. slotted liners
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/25—Methods for stimulating production
- E21B43/26—Methods for stimulating production by forming crevices or fractures
Abstract
The application provides a sand control fracturing bowling sliding sleeve. The sand control fracturing ball-throwing sliding sleeve comprises an outer shell, wherein a sand control production channel and a fracturing channel are arranged on the outer wall of the outer shell at intervals, the sand control production channel comprises a plurality of sand control through holes distributed in the circumferential direction of the outer shell, a sand control sieve is arranged in each sand control through hole, and the fracturing channel comprises a plurality of fracturing pore passages distributed in the circumferential direction of the outer shell; the fracturing ball seat inner sliding sleeve is connected to the inside of the outer shell in a sealing mode and is fixed with the outer shell through a first shearing connecting piece, so that the fracturing ball seat inner sliding sleeve is located at a first position for shielding the fracturing channel; sand control ball seat inner sliding sleeve and sand control ball seat, sand control ball seat inner sliding sleeve sealing connection in the inside of shell body, and through the second shear connector with the shell body is fixed, so that sand control ball seat inner sliding sleeve is located and shelters from the second position of sand control production passageway.
Description
Technical Field
The application relates to the technical field of oil wells, in particular to a sand control fracturing ball injection sliding sleeve.
Background
At present, for the yield increase transformation of unconventional oil and gas wells with low permeability and compact oil and gas, shale gas and the like, processes such as a graded ball injection sliding sleeve, a full-bore sliding sleeve or a casing and bridge plug perforation combined action are mostly adopted, and production is directly carried out through a fracturing channel after construction is finished; however, in the production process of many wells, sand production and other phenomena are often encountered, which causes that the well bore is blocked and normal production cannot be carried out.
Therefore, at present, a need exists for providing a sand control fracturing ball-throwing sliding sleeve, so that when production increasing measures such as fracturing are implemented, a sand control function can be provided during production.
Disclosure of Invention
The purpose of this application embodiment is to provide a sand control fracturing bowling sliding sleeve to the realization can also can provide the sand control function when implementing yield-increasing measures such as fracturing, during production.
In order to solve the above technical problem, an embodiment of the present application provides the following technical solutions:
the application provides a sand control fracturing bowling sliding sleeve, this sand control fracturing bowling sliding sleeve includes: the outer wall of the outer shell is provided with a sand control production channel and a fracturing channel at intervals along a first direction, the sand control production channel comprises a plurality of sand control through holes distributed in the circumferential direction of the outer shell, a sand control screen is arranged in each sand control through hole, and the fracturing channel comprises a plurality of fracturing pore passages distributed in the circumferential direction of the outer shell;
the fracturing ball seat inner sliding sleeve is connected to the inside of the outer shell in a sealing mode and is fixed with the outer shell through a first shearing connecting piece, so that the fracturing ball seat inner sliding sleeve is located at a first position for shielding the fracturing channel, and the fracturing ball seat is installed in the fracturing ball seat inner sliding sleeve in a sealing mode;
the inner sliding sleeve of the sand control ball seat is connected to the inside of the outer shell in a sealing mode and is fixed with the outer shell through a second shearing connecting piece, so that the inner sliding sleeve of the sand control ball seat is located at a second position for shielding the sand control production channel, and the sand control ball seat is sealed and fixedly installed in the inner sliding sleeve of the sand control ball seat;
when the first shearing connector is disconnected, the fracturing ball seat inner sliding sleeve slides to a third position which is far away from the fracturing pore passage and is in contact with the male connector, and when the second shearing connector is disconnected, the sand control ball seat inner sliding sleeve slides to a fourth position which is far away from the sand control production passage, shields the fracturing passage and is in contact with the fracturing ball seat inner sliding sleeve;
wherein the first direction is a direction from the first end to the second end.
In some variations of the first aspect of the present application, the sand control screen includes:
the mounting ring is adaptive to and fixed on the sand prevention through hole;
the sieve utensil main part is fixed in the hole of collar, the sieve utensil main part is in by a plurality of filtration pearls according to in at least one section of hole according to the shape of cross-section is arranged in proper order and at least one deck screen cloth structure that reciprocal anchorage constitutes, and is adjacent form the hole between the filtration pearl.
In some modified embodiments of the first aspect of the present application, the mounting ring is screwed to the sand control through hole, and a plurality of mounting holes are circumferentially and uniformly distributed on an outer end surface of the mounting ring.
In some modified embodiments of the first aspect of the present application, the plurality of sand control holes are distributed in the circumferential direction of the outer shell and are arranged in a plurality of rows in the axial direction of the outer shell, and any two adjacent rows are staggered in axial position.
In some modified embodiments of the first aspect of the present application, a first annular groove is formed in an end, close to the male joint, of an outer wall of the inner sliding sleeve of the sand control ball seat, an elastic limit ring is sleeved in the annular groove, and an axially through opening is formed in the elastic limit ring in the circumferential direction;
a second annular groove is formed in the inner wall of the outer shell and close to the second end;
when the fracturing ball seat inner sliding sleeve is located at the first position, the elastic limiting ring is in a compression state, and when the fracturing ball seat inner sliding sleeve is located at the third position, the elastic limiting ring is located in the second annular groove and is expanded to be matched with the second annular groove.
In some modified embodiments of the first aspect of the present application, an end surface of the second ring groove, which is away from the male connector, is a first tapered surface, and a diameter of the second ring groove gradually increases from a size equal to an inner diameter of the outer housing to a size equal to a diameter of the second ring groove along the first direction.
In some modified embodiments of the first aspect of the present application, two first anti-rotation tabs are symmetrically disposed on an end surface of the fracturing ball seat inner sliding sleeve facing the second sliding sleeve, and two second anti-rotation tabs staggered with circumferential positions of the two first anti-rotation tabs are symmetrically disposed on an end surface of the fracturing ball seat inner sliding sleeve facing the fracturing ball seat inner sliding sleeve;
the end face of the first sliding sleeve facing the male joint is symmetrically provided with two third anti-rotation lugs, and the end face of the male joint facing the sliding sleeve in the fracturing ball seat is symmetrically provided with two fourth anti-rotation lugs staggered with the circumferential positions of the third anti-rotation lugs;
when the sliding sleeve in the fracturing ball seat is located at the third position, the two third rotation preventing lugs are respectively inserted between gaps at two sides of the two fourth rotation preventing lugs;
when the inner sliding sleeve of the sand control ball seat is located at the fourth position, the two second anti-rotation lug pieces are respectively inserted between the gaps at the two sides of the two first anti-rotation lug pieces.
In some modified embodiments of the first aspect of the present application, the inner wall of the sliding sleeve in the fracturing ball seat is close to the one end of the female joint is provided with a first key groove, the inside of the sliding sleeve in the sand control ball seat is close to the one end of the female joint is provided with a second key groove, and the first key groove and the second key groove are respectively used for matching with a sliding sleeve switch tool.
In some modified embodiments of the first aspect of the present application, one end of the inner bore of each of the fracturing ball seat inner sliding sleeve and the sand control ball seat inner sliding sleeve facing the first end is provided with a second tapered surface, and the diameter of the second tapered surface is gradually increased from a size equal to that of the fracturing ball seat inner sliding sleeve or the sand control ball seat inner sliding sleeve in the reverse direction of the first direction;
the first keyway with the second keyway is close to the terminal surface of second end is the third conical surface, and its diameter is followed first direction owing the size that the internal diameter of first keyway or second keyway equals reduces gradually to with the size that fracturing ball seat internal sliding sleeve or sand control ball seat internal sliding sleeve equals.
In some variations of the first aspect of the present application, the sand control ball seat and the fracturing ball seat are machined from a drillable cast iron or a soluble metallic material.
Compare in prior art, the sand control fracturing bowling sliding sleeve that this application provided, through set up sand control production passageway and fracturing passageway on the shell body, and set up the combination of fracturing ball seat inner sliding sleeve and fracturing ball seat inside the shell body, and the combination of sand control ball seat inner sliding sleeve and sand control ball seat, the sand control fracturing bowling sliding sleeve that can make this embodiment provide can drop into the sand control ball to the sand control ball seat when possessing the function of bowling fracturing, in order to open sand control production passageway, produce through sand control production passageway and can play the sand control effect.
Drawings
The above and other objects, features and advantages of exemplary embodiments of the present application will become readily apparent from the following detailed description read in conjunction with the accompanying drawings. Several embodiments of the present application are illustrated by way of example and not by way of limitation in the figures of the accompanying drawings and in which like reference numerals refer to similar or corresponding parts and in which:
FIG. 1 schematically illustrates a half-section structure of a sand control fracturing pitching sliding sleeve in an initial state, wherein the fracturing ball seat inner sliding sleeve is in a first position, and the sand control ball seat inner sliding sleeve is in a second position;
FIG. 2 is a schematic diagram of a half-section structure of a part of a sand control fracturing pitching sliding sleeve in an initial state, which is provided by the embodiment of the invention;
FIG. 3 is a schematic diagram of a half-section structure of another part of a sand control fracturing pitching sliding sleeve provided by the embodiment of the invention in an initial state;
FIG. 4 schematically shows a schematic half-section structure of a sand control fracturing pitching sliding sleeve provided by an embodiment of the invention in a fracturing construction state, wherein the fracturing ball seat inner sliding sleeve is in a third position, and the sand control ball seat inner sliding sleeve is in a second position;
FIG. 5 schematically shows a schematic half-section structure of a sand control fracturing pitching sliding sleeve provided by an embodiment of the invention in a fracturing construction displacement stage state, wherein the sliding sleeve in the fracturing ball seat is in a third position, and the sliding sleeve in the sand control ball seat is in a fourth position;
FIG. 6 schematically illustrates a front view structural schematic diagram of an outer shell of a sand control fracturing pitching sliding sleeve provided by an embodiment of the invention;
FIG. 7 schematically illustrates a left-side view structural schematic diagram of an outer casing of a sand control fracturing pitching sliding sleeve provided by an embodiment of the invention;
FIG. 8 schematically shows a cross-sectional structure view of section A-A in FIG. 7;
FIG. 9 schematically illustrates a schematic structural diagram of a sand control screen of a sand control fracturing ball injection sliding sleeve according to an embodiment of the invention in a front view;
FIG. 10 is a schematic diagram illustrating a left-view structural diagram of a sand control screen of a sand control fracturing ball injection sliding sleeve according to an embodiment of the invention
FIG. 11 schematically shows a cross-sectional structure view of section A-A in FIG. 10;
FIG. 12 schematically illustrates a schematic structural diagram of a fracturing ball seat inner sliding sleeve of a sand control fracturing pitching sliding sleeve provided by an embodiment of the invention in a front view;
FIG. 13 schematically shows a cross-sectional structure view of section A-A in FIG. 12;
FIG. 14 schematically shows a cross-sectional structural view of section B-B in FIG. 13;
FIG. 15 schematically illustrates a cross-sectional structural view of section C-C of FIG. 13;
FIG. 16 schematically illustrates a left-side view structural schematic diagram of a fracturing ball seat of a sand control fracturing pitching sliding sleeve provided by an embodiment of the invention;
FIG. 17 schematically shows a cross-sectional structure view of section A-A in FIG. 16;
FIG. 18 schematically illustrates a right-side structural view of a fracturing ball seat of a sand control fracturing pitching sliding sleeve provided by an embodiment of the invention;
FIG. 19 schematically illustrates a front view structural schematic diagram of a sand control ball seat inner sliding sleeve of the sand control fracturing pitching sliding sleeve provided by the embodiment of the invention;
FIG. 20 schematically shows a cross-sectional structural view of section A-A in FIG. 19;
FIG. 21 schematically illustrates a cross-sectional structural view of section B-B in FIG. 19;
FIG. 22 schematically illustrates a left-side view structural schematic diagram of a sand control ball seat of a sand control fracturing pitching sliding sleeve provided by an embodiment of the invention;
FIG. 23 schematically shows a cross-sectional structure view of section A-A in FIG. 22;
FIG. 24 schematically illustrates a right-side view structural schematic diagram of a sand control ball seat of a sand control fracturing pitching sliding sleeve provided by an embodiment of the invention;
FIG. 25 schematically illustrates a schematic structural diagram of a primary view of a male joint of a sand control fracturing pitching sliding sleeve provided by an embodiment of the invention;
FIG. 26 schematically illustrates a left-side view structural schematic of a male joint of a sand control fracturing pitching sliding sleeve provided by an embodiment of the invention;
FIG. 27 schematically shows a cross-sectional structural view of section A-A in FIG. 26;
the reference numbers illustrate:
the sand control device comprises an outer shell 1, a first end 1a, a second end 1b, a sand control through hole 101, a fracturing pore passage 102, a first trapezoidal thread 103, a second trapezoidal thread 104, a first shearing hole 105, a second shearing hole 106, a first tightening hole 107, a second tightening hole 108, a female joint 2, a male joint 3, a sand control screen 4, a fracturing ball seat inner sliding sleeve 5, a first shearing mounting hole 501, a third trapezoidal thread 502, a fracturing ball seat 6, a first shearing connecting piece 7, a sand control ball seat inner sliding sleeve 8, a second shearing mounting hole 801, a fourth trapezoidal thread 802, a sand control ball seat 9, a second shearing connecting piece 10, a first tightening screw 11, a first sealing piece 12, a second tightening screw 13, a second sealing piece 14, a third sealing piece 15, a fourth sealing piece 16, a fifth sealing piece 17, a sixth sealing piece 18, a ball seat taper hole 19, a first mounting hole 20, a mounting ring 21, a filter ball 22, a second mounting hole 23, The anti-rotation device comprises a first ring groove 24, an elastic limiting ring 25, a second ring groove 26, a first conical surface 26a, a first anti-rotation lug 27, a second anti-rotation lug 28, a third anti-rotation lug 29, a first key groove 30, a second key groove 31, a fracturing ball 32, a sand control ball 33, a third sealing groove 34, a fourth sealing groove 35, a fourth anti-rotation lug 36, a fifth sealing groove 37, a sixth sealing groove 38 and a first direction X.
Detailed Description
Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.
It is to be noted that, unless otherwise specified, technical or scientific terms used herein shall have the ordinary meaning as understood by those skilled in the art to which this application belongs.
In the prior art, the conventional fracturing sliding sleeve meets the requirement of fracturing discharge capacity (generally the minimum requirement is 3 m) 3 More than min), therefore, the open pore of the fracturing channel cannot be too small, and the channel cannot play a role in sand prevention when the channel is used for production after fracturing is finished; if the sand control screen pipe, the slotted pipe and other products are directly adopted for well completion in order to play the sand control role, and the inside and the outside of the screen pipe are communicated, the fracturing cannot be implementedAnd increasing production measures; at present, the scheme is that a sand control screen is welded on the outer side of an outer shell in a covering mode to prevent sand, but the maximum outer diameter of a tool is increased inevitably, so that the problem that the tool is difficult to put into a shaft is caused, and if the shaft descending difficulty is considered and the drift diameter in a sliding sleeve is reduced, the problem that the number of sections in the shaft with the same size is reduced is caused. Therefore, there is a need to develop a tool that can perform fracturing and other stimulation measures and also can provide a sand control function during production.
Examples
To solve the problems in the prior art, please refer to fig. 1-27, as shown in the figures, an embodiment of the present invention provides a sand fracture control ball injection sliding sleeve, which includes: the sand control device comprises an outer shell 1, wherein a first end 1a and a second end 1b, which are opposite to each other, of the outer shell 1 are respectively and fixedly connected with a female joint 2 and a male joint 3 in a sealing manner, sand control production channels and fracturing channels are arranged on the outer wall of the outer shell 1 at intervals along a first direction X, the sand control production channels comprise a plurality of sand control through holes 101 distributed in the circumferential direction of the outer shell 1, a sand control screen 4 is respectively arranged in each sand control through hole 101, and the fracturing channels comprise a plurality of fracturing pore channels 102 distributed in the circumferential direction of the outer shell 1; the fracturing ball seat inner sliding sleeve 5 is connected to the inside of the outer shell 1 in a sealing mode and is fixed with the outer shell 1 through a first shearing connecting piece 7, so that the fracturing ball seat inner sliding sleeve 5 is located at a first position for shielding a fracturing channel, and the fracturing ball seat 6 is installed in the fracturing ball seat inner sliding sleeve 5 in a sealing mode; the sand control ball seat inner sliding sleeve 8 is connected to the inside of the outer shell 1 in a sealing mode and is fixed with the outer shell 1 through a second shearing connecting piece 10, so that the sand control ball seat inner sliding sleeve 8 is located at a second position for shielding the sand control production channel, and the sand control ball seat 9 is installed in the sand control ball seat inner sliding sleeve 8 in a sealing mode and is fixed; when the first shear connector 7 is disconnected, the fracturing ball seat inner sliding sleeve 5 slides to a third position far away from the fracturing hole 102 and in contact with the male joint 3, and when the second shear connector 10 is disconnected, the fracturing ball seat inner sliding sleeve 8 slides to a fourth position far away from the sand control production passage, blocks the fracturing passage and is in contact with the fracturing ball seat inner sliding sleeve 5; wherein the first direction X is a direction from the first end 1a to the second end 1 b.
The sand control fracturing ball-throwing sliding sleeve provided by the embodiment can be used in a multi-section fracturing process of a vertical well and a horizontal well of unconventional oil and gas wells such as low-permeability, compact oil gas and shale oil gas, and can also be used for selectively producing near-production and production-increasing measure wells; in specific implementation, dividing a reservoir into a plurality of sections according to geological and technological requirements, putting packers at corresponding positions, putting the sand control fracturing ball-throwing sliding sleeves provided by the embodiment at corresponding positions to be modified, connecting the packers and the sand control fracturing ball-throwing sliding sleeves into a string, and setting the packers by operations such as pressing after a completion string is put to a designed position; referring to fig. 4, as shown in the figure, when fracturing construction is performed, a fracturing ball 32 corresponding to a fracturing ball seat 6 in a fracturing ball seat inner sliding sleeve 5 is thrown into the fracturing ball seat from a wellhead and reaches the position of the fracturing ball seat 6 after pumping, the fracturing ball 32 and the fracturing ball seat 6 are sealed through line contact, then after the fracturing is suppressed, the first shear connector 7 is disconnected, the fracturing ball seat inner sliding sleeve 5 slides from the first position to the third position, fracturing channels are communicated, and fracturing construction can be performed; referring to fig. 5, as shown in the figure, in a fracturing construction replacement stage of the interval, sand control balls 33 corresponding to the sand control ball seats 9 in the inner sliding sleeves 8 of the sand control ball seats are put into the fracturing construction replacement stage, and the sand control balls 33 and the sand control ball seats 9 reach the positions of the sand control ball seats 9 after pumping, the sand control balls 33 and the sand control ball seats 9 are sealed through line contact, then the second shearing connecting pieces 10 are disconnected after pressure is suppressed, the inner sliding sleeves 8 of the sand control ball seats slide to a fourth position from the second position, the fracturing channels are closed while the sand control production channels are opened, formation oil gas can enter the inside of a shaft through the sand control production channels for production, and the sand control screen 4 of the sand control production channels can effectively play a sand control role; after fracturing construction is accomplished, the fracturing ball seat 6 and the sand control ball seat 9 are bored and are removed or dissolve the back, can use sliding sleeve switching tool to carry out the switching operation to sliding sleeve 5 in the fracturing ball seat and sliding sleeve 8 in the sand control ball seat.
Specifically, referring to fig. 6-8, as shown in the figures, the outer casing 1 can be made of 42CrMo/35CrMo alloy steel, which is provided with a first end 1a and a second end 1b which are opposite, the inner wall of the first end 1a of the outer shell 1 is provided with a first trapezoidal thread 103 for connecting the female joint 2, and the circumferential directions of the outer shell 1 and the female joint 2 are correspondingly provided with 4 first fastening holes 107, the first set screw 11 is used for connecting the outer shell 1 and the female joint 2 to further fix, a first set hole 107 on the outer shell 1 can be located on one side of the first trapezoidal thread 103 far away from the second end 1b, a first sealing groove used for installing a first sealing element 12 is formed in the outer wall of the end part of the female joint 2 located inside the outer shell 1, the first sealing groove can be located on one side of the first trapezoidal thread 103 close to the second end 1b, and the outer shell 1 and the female joint 2 are connected in a sealing mode through the first sealing element 12; a second trapezoidal thread 104 for connecting the male connector 3 is arranged in the second end 1b of the outer shell 1, 4 second fastening holes 108 are correspondingly formed in the outer shell 1 and the male connector 3 and used for connecting second fastening screws 13 to further fix the outer shell 1 and the male connector 3, a second sealing groove for mounting a second sealing element 14 is formed in the inner wall of the outer shell 1 and on one side, close to the first end 1a, of the second trapezoidal thread 104, and the outer shell 1 and the male connector 3 are hermetically connected through the second sealing element 14; the sand control production channel and the fracturing channel are sequentially arranged on the outer shell 1 along a first direction X with a first end 1a pointing to a second end 1b, the sand control production channel comprises a plurality of axial sand control through holes 101 distributed on the outer shell, the sand control through holes 101 are communicated with a production layer, and a sand control screen 4 is arranged in the sand control through holes 101, so that the sand control effect can be achieved in production, and the influences on the maximum outer diameter and the inner diameter of the sand control fracturing ball throwing sliding sleeve provided by the embodiment can be avoided; the fracturing channel comprises a plurality of fracturing pore passages 102 which are respectively communicated with the circumferential direction of the outer shell 1, the fracturing pore passages 102 can be specifically arranged into elongated holes, the number of the fracturing pore passages can be but is not limited to 8, the fracturing pore passages 102 are communicated with a production layer, and when fracturing construction is carried out, fracturing liquid and propping agents can enter the production layer through the fracturing pore passages 102.
Specifically, referring to fig. 12 to 13, as shown in the drawings, the sliding sleeve 5 in the fracturing ball seat can be made of 42CrMo/35CrMo alloy steel; the middle part of the outer wall of the fracturing ball seat inner sliding sleeve 5 is circumferentially and uniformly provided with 8 first shearing mounting holes 501, the depth of each first shearing mounting hole 501 can be 4mm, one side, adjacent to the fracturing channel and located close to the second end 1b of the fracturing channel, of the outer shell 1 is correspondingly provided with 8 first shearing holes 105, and the first shearing mounting holes 501 are matched with the first shearing connecting pieces 7 to fix the fracturing ball seat inner sliding sleeve 5 to the first position in the outer shell 1, as shown in the attached drawings 1 and 3, when the fracturing ball seat inner sliding sleeve 5 is located at the first position, the fracturing ball seat inner sliding sleeve 5 corresponds to and shields the fracturing channel; a third trapezoidal thread 502 is arranged on one side, close to the second end 1b, of the inner wall of the sliding sleeve 5 in the fracturing ball seat and is used for connecting the fracturing ball seat 6; when fracturing construction is carried out, a fracturing ball 32 is thrown in from a wellhead to seal the fracturing ball 32 and the fracturing ball seat 6, the first shear connector 7 is disconnected after pressure is suppressed, as shown in the attached figure 4, a sliding sleeve 5 in the fracturing ball seat can slide to a third position contacting with the male connector 3 in the direction away from the fracturing hole 102, and a fracturing channel at the moment is communicated with a production zone; a third sealing groove 34 for installing a third sealing element 15 is respectively arranged at the two ends of the outer wall of the fracturing ball seat inner sliding sleeve 5, which are respectively close to the first end 1a and the second end 1b, and the fracturing ball seat inner sliding sleeve 5 is in sealing connection with the outer shell 1 through the third sealing element 15; the inner wall of the fracturing ball seat inner sliding sleeve 5 and the side, close to the first end 1a, of the third trapezoidal thread 502 are provided with a fourth sealing groove 35 for installing a fourth sealing element 16, and the fracturing ball seat inner sliding sleeve 5 is in sealing connection with the fracturing ball seat 6 through the fourth sealing element 16.
Specifically, referring to fig. 19-21, as shown in the drawings, the sliding sleeve 8 in the sand control ball seat may be made of 42CrMo/35CrMo alloy steel; the middle part of the outer wall of the sand control ball seat inner sliding sleeve 8 is axially and uniformly provided with 8 second shearing mounting holes 801, the depth of each second shearing mounting hole 801 can be 4mm, the outer shell 1 is correspondingly provided with 8 second shearing holes 106 at the position adjacent to the sand control production channel and at one side of the sand control production channel close to the second end 1b, and the second shearing mounting holes 801 are used for being matched with the second shearing mounting holes 801 to be connected with the second shearing connecting pieces 10 so as to fix the sand control ball seat inner sliding sleeve 8 to the second position in the outer shell 1, as shown in the attached drawings 1 and 2, when the sand control ball seat inner sliding sleeve 8 is at the second position, the sand control ball seat inner sliding sleeve 8 corresponds to and shields the sand control production channel; a fourth trapezoidal thread 802 is arranged on the inner wall of the inner sliding sleeve 8 of the sand control ball seat and on one side close to the second end 1b and is used for connecting the sand control ball seat 9; in the displacement stage of fracturing construction, the sand control ball 33 is put into the wellhead to seal the sand control ball 33 and the sand control ball seat 9, and the second shear connector 10 is disconnected after pressure is suppressed, as shown in the attached drawing 5, the sand control ball seat inner sliding sleeve 8 can slide from the second position to the direction far away from the sand control production channel to the fourth position which is in contact with the fracturing channel and shields the fracturing channel and is in contact with the fracturing ball seat inner sliding sleeve 5, and at the moment, the sand control production channel is opened; the outer wall of the sand control ball seat inner sliding sleeve 8 and two ends respectively close to the first end 1a and the second end 1b are respectively provided with a fifth sealing groove 37 for installing a fifth sealing element 17, and the sand control ball seat inner sliding sleeve 8 is in sealing connection with the outer shell 1 through the fifth sealing element 17; the inner wall of the inner sliding sleeve 8 of the sand control ball seat and the side of the fourth trapezoidal thread 802 close to the first end 1a are provided with a sixth sealing groove 38 for installing a sixth sealing element 18, and the inner sliding sleeve 8 of the sand control ball seat is connected with the sand control ball seat 9 in a sealing manner through the sixth sealing element 18.
Specifically, referring to fig. 16-18 and fig. 22-24, the fracturing ball seat 6 and the sand control ball seat 9 may be made of drillable cast iron or soluble metal material, and both sides of the fracturing ball seat 6 and the sand control ball seat 9 facing the first end 1a are provided with 60 ° ball seat taper holes 19 for seating of corresponding fracturing balls 32 or sand control balls 33; four first mounting holes 20 are uniformly distributed on one sides of the fracturing ball seat 6 and the sand control ball seat 9, which face the second end 1b, so that the ball seats can be mounted in the corresponding fracturing ball seat inner sliding sleeve 5 or sand control ball seat inner sliding sleeve 8 by using tools; a thread matched with the third trapezoidal thread 502 is arranged on one side, close to the second end 1b, of the outer wall of the fracturing ball seat 6, so that connection with the sliding sleeve 5 in the fracturing ball seat is achieved; threads matched with the fourth trapezoidal threads 802 are arranged on one side, close to the second end 1b, of the outer wall of the sand control ball seat 9, so that connection with the inner sliding sleeve 8 of the sand control ball seat is achieved; wherein, sand control ball seat 9 and fracturing ball seat 6 can adopt 1/16 grade difference, and sand control ball seat 9 is 1/16 inches than the size of fracturing ball seat 6 more promptly, and such design can improve the grading ability.
It should be noted that the above and the following descriptions of the positions of the structures relative to the first end 1a and the second end 1b are defined as relative positions of the structures and the outer shell 1 after installation; each shear connector can be a shear pin, each sealing element can be an O-shaped ring or a combination of two check rings and the O-shaped ring, and the groove of each check ring is required to be ensured to face towards the O-shaped ring.
According to the above list, the embodiment of the invention provides a sand control fracturing pitching sliding sleeve, a sand control production channel and a fracturing channel are arranged on an outer shell 1, a combination of a fracturing ball seat inner sliding sleeve 5 and a fracturing ball seat 6 and a combination of a sand control ball seat inner sliding sleeve 8 and a sand control ball seat 9 are arranged in the outer shell 1, so that sand control balls can be thrown into the sand control ball seat 9 while the sand control fracturing sliding sleeve provided by the embodiment has a pitching fracturing function, the sand control production channel is opened, and the sand control effect can be achieved by producing through the sand control production channel.
Further, referring to fig. 1, in the technical scheme adopted by the present invention, the structure of the sand control screen 4 specifically includes: the mounting ring 21 and the sifter body, wherein the mounting ring 21 is of an annular structure, the outline shape of the mounting ring 21 is adapted to the shape of the sand control through hole 101, the shape of the sand control through hole 101 can be circular, the corresponding mounting ring 21 is of a circular structure, threads are correspondingly arranged on the outer wall of the mounting ring 21 and the inner wall of the sand control through hole 101, so that the mounting ring 21 is in threaded connection with the sand control through hole 101, and a plurality of second mounting holes 23 are arranged on the outer end surface of the mounting ring 21, so that the mounting ring 21 can be conveniently mounted in the sand control through hole 101 of the outer shell 1 by using a tool; the main body of the screening device is fixed in an inner hole of the mounting ring 21, the main body of the screening device is formed by sintering or welding a plurality of filtering beads 22 into at least one layer of screen mesh structure, pores between the adjacent filtering beads 22 can enable formation oil gas to pass through to enter a shaft for production, the filtering beads 22 of the main body of the screening device can realize sand prevention through blocking effect, the filtering beads 22 can be made of stainless steel or nickel alloy materials, and the outer diameter of the filtering beads 22 can be selected to be 10, 12, 14, 16, 22, 30 meshes and the like according to the sand prevention requirement; it should be noted that, after sand control screen 4 is installed to sand control through-hole 101, the outer terminal surface of sand control screen 4 is not evaginated in the outer wall of shell body 1, does not occupy the inside and outside installation space of shell body 1, can not cause the increase to the maximum external diameter of sand control fracturing bowling sliding sleeve instrument promptly, and does not have the influence to inner tube segmentable quantity.
Further, referring to fig. 6 and 8, in the technical scheme adopted by the present invention, while the plurality of sand control holes 101 are uniformly distributed in the circumferential direction of the outer shell 1, a plurality of rows may be distributed in the axial direction of the outer shell 1, each row may include 4 sand control holes 101 arranged at intervals, and two adjacent rows of sand control holes 101 are arranged at 45 ° in a staggered manner, the number of rows in which the sand control holes 101 are specifically arranged may be determined according to the equivalent area of the inner hole, and is not specifically limited herein.
Further, referring to fig. 3, fig. 4, fig. 8 and fig. 12, in order to limit the sliding sleeve 5 in the fracturing ball seat when the sliding sleeve 5 slides to the third position, in the technical scheme adopted by the present invention, a first ring groove 24 is disposed on the outer wall of the sliding sleeve 5 in the fracturing ball seat and near the first end 1a, an elastic limit ring 25 is disposed in the first ring groove 24, the elastic limit ring 25 is axially provided with an axially through opening, i.e., the cross section of the elastic limit ring 25 is "C" -shaped, the cross section is a cross section perpendicular to the axial direction of the sliding sleeve 5 in the fracturing ball seat, by providing the opening, the elastic limit ring 25 can be conveniently sleeved in the first ring groove 24, correspondingly, a second ring groove 26 is disposed on the inner wall of the outer housing 1 and near the second end 1b, the second ring groove 26 is located on one side of the second trapezoidal thread 104 near the first end 1a, and the second seal groove may be disposed in the second annular groove 26 and located at a side close to the second acme thread 104; the elastic limit ring 25 has certain elasticity, when the sliding sleeve 5 in the fracturing ball seat is positioned at the first position, the elastic limit ring 25 is in a compression state, when the sliding sleeve 8 in the sand control ball seat is positioned at the third position, the elastic limit ring 26 is positioned in the second annular groove 26, and as the diameter of the second annular groove 26 is larger than the aperture of the outer shell 1, the elastic limit ring 26 can expand to a certain degree and is adapted to the second annular groove 26, so that the position of the sliding sleeve 5 in the fracturing ball seat can be limited, and when the fracturing ball seat 6 is drilled or dissolved, and the sliding sleeve in the fracturing ball seat is opened and closed through a sliding sleeve opening and closing tool, the clamping force of the elastic limit ring 26 and the second annular groove 24 can be overcome only by applying a certain force; in order to avoid the second ring groove 24 from clamping the elastic limiting member 26, as shown in fig. 8, the end surface of the second ring groove 24 far away from the first end 1a can be set as a first conical surface 26a, the diameter of the first conical surface 26a is gradually increased from the size equal to the inner hole diameter of the outer shell 1 to the size equal to the diameter of the second ring groove 24 along the first direction X, so that the inner holes of the second ring groove 24 and the outer shell 1 on the side of the second ring groove 24 close to the first end 1a can play a transition role, the limitation of the second ring groove 24 on the elastic limiting ring 25 and the sliding sleeve 5 in the fracturing ball seat can be realized, and the limitation on the elastic limiting ring 25 and the sliding sleeve 5 in the fracturing ball seat can be released under the condition of applying a certain acting force.
Further, in the technical scheme adopted by the invention, two mutually symmetrical first anti-rotation lugs 27 are respectively arranged on the end surface of the fracturing ball seat inner sliding sleeve 5 facing the fracturing ball seat inner sliding sleeve 8, the first anti-rotation lugs 27 can be two arc lugs with the same diameter as the fracturing ball seat inner sliding sleeve 5, two symmetrical second anti-rotation lugs 28 are correspondingly arranged on the end surface of the fracturing ball seat inner sliding sleeve 8 facing the fracturing ball seat inner sliding sleeve 5, the second anti-rotation lugs 28 can be two arc lugs with the same diameter as the fracturing ball seat inner sliding sleeve 8, the two second anti-rotation lugs 28 are staggered with the circumferential positions of the two first anti-rotation lugs 27, the axial sizes of the first anti-rotation lugs 27 and the second anti-rotation lugs 28 can be set to be equal, when the fracturing ball seat inner sliding sleeve 8 is at the fourth position, the two second anti-rotation lugs 28 are respectively inserted between the gaps at the two sides of the two first anti-rotation lugs 27, therefore, when the sand control ball seat 9 is drilled out, the function of limiting the rotation of the sliding sleeve 8 in the sand control ball seat is achieved, and more specifically, the circumferential sizes of the two second anti-rotation lugs 28 can be respectively matched with the circumferential size of the gap between the two first anti-rotation lugs 27; similarly, two symmetrical third anti-rotation lugs 29 can be arranged on the end surface of the fracturing ball seat inner sliding sleeve 5 facing the male joint 3, the third anti-rotation lugs 29 can be two arc lugs with the same diameter as the fracturing ball seat inner sliding sleeve 5, two symmetrical fourth anti-rotation lugs 36 can be correspondingly arranged on the end surface of the male joint 3 facing the fracturing ball seat inner sliding sleeve 5, the fourth anti-rotation lugs 36 can be two arc lugs with the same diameter as the male joint 3, the two third anti-rotation lugs 29 are staggered with the circumferential positions of the two fourth anti-rotation lugs 36, the axial sizes of the third anti-rotation lugs 29 and the fourth anti-rotation lugs 36 can be set to be the same size, when the fracturing ball seat inner sliding sleeve 5 is in the third position, the two third anti-rotation lugs 29 are respectively inserted between the gaps at the two sides of the two fourth anti-rotation lugs 36, so that when the fracturing ball seat 6 is drilled, the function of limiting the rotation of the fracturing ball seat inner sliding sleeve 5 is achieved, more specifically, the circumferential dimensions of the two third rotation prevention lugs 29 may be adapted to the circumferential dimensions of the gap between the two fourth rotation prevention lugs 36, respectively.
Further, referring to fig. 13 and 20, in order to perform opening and closing operations on the fracturing ball seat inner sliding sleeve 5 and the sand control ball seat inner sliding sleeve 8 by using a sliding sleeve opening and closing tool after the fracturing ball seat 6 and the sand control ball seat 9 are drilled or dissolved, in the technical scheme adopted by the invention, a first key groove 30 is arranged at one end, close to the female joint 2, of the inner wall of the fracturing ball seat inner sliding sleeve 5, a second key groove 31 is arranged at one end, close to the female joint 2, of the inner part of the sand control ball seat inner sliding sleeve 6, and the first key groove 30 and the second key groove 31 can be respectively used for matching with the sliding sleeve opening and closing tool; in order to guide the sliding sleeve opening and closing tool to go down, two conical surfaces are respectively arranged at the inner holes of the fracturing ball seat inner sliding sleeve 5 and the sand control ball seat inner sliding sleeve 8 and at one end facing the first end 1a, the diameter of each conical surface is gradually increased along the reverse direction of the first direction X by the size equal to that of the fracturing ball seat inner sliding sleeve 5 or the sand control ball seat inner sliding sleeve 8, and the sliding sleeve opening and closing tool can be used for guiding the sliding sleeve opening and closing tool and reducing the liquid erosion effect; and the end surfaces of the first key groove 30 and the second key groove 31 close to the second end 1b can be set to be third conical surfaces, and the diameter of the third conical surfaces is gradually reduced to the size equal to the fracturing ball seat inner sliding sleeve 5 or the sand control ball seat inner sliding sleeve 8 along the first direction X due to the size equal to the inner diameter of the first key groove 30 or the second key groove 31.
Specifically, the equipment process of sand control fracturing bowling sliding sleeve that this embodiment provided does:
installing a sixth sealing element 18 into a sixth sealing groove 38 on the inner wall of the sand-prevention ball seat inner sliding sleeve 8, installing a sand-prevention ball seat 9 into one end, close to the second end 1b, of the sand-prevention ball seat inner sliding sleeve 8, and performing threaded connection with a fourth trapezoidal thread 802, installing two fifth sealing elements 17 into two fifth sealing grooves 37 on the outer wall of the sand-prevention ball seat inner sliding sleeve 8 and respectively arranging two ends of the outer wall of the sand-prevention ball seat inner sliding sleeve 8, then installing the sand-prevention ball seat inner sliding sleeve 8 into an inner hole of the second end 1b of the outer shell 1, aligning 8 second shearing installation holes 801 of the sand-prevention ball seat inner sliding sleeve 8 with 8 second shearing holes 106 on the corresponding position of the outer shell 1, and connecting and fixing the 8 second shearing connection elements 10;
installing a first sealing element 12 into a first sealing groove on the outer wall of a female joint 2, connecting the female joint 2 with a first trapezoidal thread 103 at a first end 1a of an outer shell 1 in a threaded manner, installing 4 first fastening screws 11 into corresponding first fastening holes 107 on the outer shell 1 and the female joint 2, installing a sand control screen 4 into a sand control through hole 101 of the outer shell 1 through a tool, and fixedly connecting an installation ring 21 of the sand control screen 4 with the sand control through hole 101 in a threaded manner;
installing a fourth sealing element 16 into a fourth sealing groove 35 on the inner wall of the fracturing ball seat inner sliding sleeve 5, connecting the fracturing ball seat 6 with a third trapezoidal thread 502 on the fracturing ball seat inner sliding sleeve 5 close to the second end 1b in a threaded manner, installing two third sealing elements 15 into two third sealing grooves 34 which are respectively arranged outside the fracturing ball seat inner sliding sleeve 5 and are respectively arranged at two ends, then installing the fracturing ball seat inner sliding sleeve 5 into an inner hole of the second end 1b of the outer shell 1, during installation, requiring that two first anti-rotation lug plates 27 on the fracturing ball seat inner sliding sleeve 5 close to the first end 1a are circumferentially staggered with two second anti-rotation lug plates 28 of the fracturing ball seat inner sliding sleeve 8, and then enabling 8 first shearing installation holes 501 of the fracturing ball seat inner sliding sleeve 5 to be in one-to-one correspondence with 8 corresponding first shearing holes 105 on the outer shell 1 and fixedly connected through a first shearing connecting element 7;
install second sealing member 14 to the second seal groove of shell body 1 inner wall in, with the second trapezoidal thread 104 threaded connection of second end 1b of male joint 3 and shell body 1, during the installation, require fracturing ball seat sliding sleeve 5 to go up two third anti-rotation ears 29 that are close to second end 1b and two fourth anti-rotation ears 36 circumference of male joint 3 crisscross, then install 4 second holding screw 13 to shell body 1 and male joint 3 corresponding 4 second tight set hole 108 in, make it fixed male joint 3. The tool assembly is now complete.
It should be noted that in the description of the present specification, the terms "upper", "lower", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, which are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and operate, and thus, should not be construed as limiting the present invention; the terms "connected," "mounted," "secured," and the like are to be construed broadly and include, for example, fixed connections, removable connections, or integral connections; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the description herein, the description of the terms "one embodiment," "some embodiments," "specific embodiments," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.
Claims (10)
1. The utility model provides a sand control fracturing bowling sliding sleeve which characterized in that includes:
the outer wall of the outer shell is provided with a sand control production channel and a fracturing channel at intervals along a first direction, the sand control production channel comprises a plurality of sand control through holes distributed in the circumferential direction of the outer shell, a sand control screen is arranged in each sand control through hole, and the fracturing channel comprises a plurality of fracturing pore passages distributed in the circumferential direction of the outer shell;
the fracturing ball seat inner sliding sleeve is connected to the inside of the outer shell in a sealing mode and is fixed with the outer shell through a first shearing connecting piece, so that the fracturing ball seat inner sliding sleeve is located at a first position for shielding the fracturing channel, and the fracturing ball seat is installed in the fracturing ball seat inner sliding sleeve in a sealing mode;
the inner sliding sleeve of the sand control ball seat is connected to the inside of the outer shell in a sealing mode and is fixed with the outer shell through a second shearing connecting piece, so that the inner sliding sleeve of the sand control ball seat is located at a second position for shielding the sand control production channel, and the sand control ball seat is sealed and fixedly installed in the inner sliding sleeve of the sand control ball seat;
when the first shearing connector is disconnected, the fracturing ball seat inner sliding sleeve slides to a third position which is far away from the fracturing pore passage and is in contact with the male connector, and when the second shearing connector is disconnected, the sand control ball seat inner sliding sleeve slides to a fourth position which is far away from the sand control production passage, shields the fracturing passage and is in contact with the fracturing ball seat inner sliding sleeve;
wherein the first direction is a direction from the first end to the second end.
2. The sand control fracturing ball injection sliding sleeve according to claim 1,
the sand control screen includes:
the mounting ring is adaptive to and fixed on the sand prevention through hole;
the sieve utensil main part is fixed in the hole of collar, the sieve utensil main part is in by a plurality of filtration pearls according to in at least one section of hole according to the shape of cross-section is arranged in proper order and at least one deck screen cloth structure that reciprocal anchorage constitutes, and is adjacent form the hole between the filtration pearl.
3. The sand control fracturing ball injection sliding sleeve according to claim 2,
the mounting ring is in threaded connection with the sand-proof through hole, and a plurality of mounting holes are uniformly distributed on the outer end face of the mounting ring in the circumferential direction.
4. The sand control fracturing ball injection sliding sleeve according to claim 1,
the plurality of sand control pore canals are distributed in the circumferential direction of the outer shell, and are arranged in a plurality of rows in the axial direction of the outer shell, and any two adjacent rows are staggered in axial position.
5. The sand control fracturing ball injection sliding sleeve according to claim 1,
a first annular groove is formed in the outer wall of the sliding sleeve in the sand prevention ball seat and at one end close to the male connector, an elastic limiting ring is sleeved in the annular groove, and an axially through opening is formed in the circumferential direction of the elastic limiting ring;
a second annular groove is formed in the inner wall of the outer shell and close to the second end;
when the fracturing ball seat inner sliding sleeve is located at the first position, the elastic limiting ring is in a compression state, and when the fracturing ball seat inner sliding sleeve is located at the third position, the elastic limiting ring is located in the second annular groove and is expanded to be matched with the second annular groove.
6. The sand control fracturing ball injection sliding sleeve according to claim 5,
the end face, far away from the male connector, of the second annular groove is a first conical face, and the diameter of the second annular groove is gradually increased to the size equal to the diameter of the second annular groove from the size equal to the inner diameter of the outer shell along the first direction.
7. The sand control fracturing ball injection sliding sleeve according to claim 1,
the end face, facing the second sliding sleeve, of the fracturing ball seat inner sliding sleeve is symmetrically provided with two first anti-rotation lugs, and the end face, facing the fracturing ball seat inner sliding sleeve, of the fracturing ball seat inner sliding sleeve is symmetrically provided with two second anti-rotation lugs staggered with the circumferential positions of the two first anti-rotation lugs;
the end face of the first sliding sleeve facing the male joint is symmetrically provided with two third anti-rotation lugs, and the end face of the male joint facing the sliding sleeve in the fracturing ball seat is symmetrically provided with two fourth anti-rotation lugs staggered with the circumferential positions of the third anti-rotation lugs;
when the sliding sleeve in the fracturing ball seat is located at the third position, the two third rotation preventing lugs are respectively inserted between gaps at two sides of the two fourth rotation preventing lugs;
when the inner sliding sleeve of the sand control ball seat is located at the fourth position, the two second anti-rotation lug pieces are respectively inserted between the gaps at the two sides of the two first anti-rotation lug pieces.
8. The sand control fracturing ball injection sliding sleeve according to claim 1,
the inner wall of the fracturing ball seat inner sliding sleeve is close to one end of the female joint is provided with a first key groove, the inside of the sand control ball seat inner sliding sleeve is close to one end of the female joint is provided with a second key groove, and the first key groove and the second key groove are respectively used for being matched with a sliding sleeve switch tool.
9. The sand control fracturing ball injection sliding sleeve according to claim 8,
the inner holes of the fracturing ball seat inner sliding sleeve and the sand control ball seat inner sliding sleeve are respectively provided with a second conical surface towards one end of the first end, and the diameter of the second conical surface is gradually increased along the reverse direction of the first direction by the size equal to that of the fracturing ball seat inner sliding sleeve or the sand control ball seat inner sliding sleeve;
the first keyway with the second keyway is close to the terminal surface of second end is the third conical surface, and its diameter is followed first direction owing the size that the internal diameter of first keyway or second keyway equals reduces gradually to with the size that fracturing ball seat internal sliding sleeve or sand control ball seat internal sliding sleeve equals.
10. The sand control fracturing ball injection sliding sleeve according to claim 1,
the sand control ball seat and the fracturing ball seat are made of drillable cast iron or soluble metal materials.
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| CN202210514418.9A CN114837613A (en) | 2022-05-12 | 2022-05-12 | Sand control fracturing ball injection sliding sleeve |
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