CN211924116U - Hydraulic anchor of sand control type - Google Patents
Hydraulic anchor of sand control type Download PDFInfo
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- CN211924116U CN211924116U CN202020482671.7U CN202020482671U CN211924116U CN 211924116 U CN211924116 U CN 211924116U CN 202020482671 U CN202020482671 U CN 202020482671U CN 211924116 U CN211924116 U CN 211924116U
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- hydraulic anchor
- sand control
- control type
- upper joint
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Abstract
The utility model relates to a hydraulic anchor of sand control type belongs to oil gas well borehole operation instrument field. The sealing anchoring mechanism comprises an upper joint, a shell, a lining and a sealing anchoring mechanism, wherein the upper joint is installed on one end head of the shell in a threaded mode, the lining is arranged inside the shell on one side of the upper joint and is in contact connection with the upper joint, bosses are arranged on the circumference of the shell, mounting holes are formed in the bosses at intervals and are communicated with a center hole of the shell, and the sealing anchoring mechanism is installed in the mounting holes through a pressing plate. The hydraulic anchor can effectively prevent sand grains in liquid from eroding the shell through the sand prevention groove on the lining, does not influence the normal passing of the liquid, and effectively transmits the liquid pressure to the spherical teeth, so that the anchoring function of the hydraulic anchor is more stable and reliable; the pressure plate of the hydraulic anchor utilizes a dovetail groove on the shell and a double limiting mode of fastening the screw, and the structure can increase the stress area of the pressure plate so as to eliminate potential safety hazards caused by deformation of the pressure plate, damage of the screw and breakage of the screw.
Description
Technical Field
The utility model relates to a hydraulic anchor of sand control type belongs to oil gas well borehole operation instrument field.
Background
The hydraulic anchor can bear higher pressure, meets the requirement of an anchoring device for operation of a deeper well, and has the main function of ensuring the stability of an underground operation tool; when the hydraulic anchor works, the anchor flukes radially extend outwards under the action of liquid pressure to tightly clamp the inner wall of the casing pipe, so that the anchoring action of the underground working tool is realized; the pipe column can be effectively prevented from moving due to the change of temperature, pressure and load torque during construction.
When the existing hydraulic anchor on the market is used for underground acidification and sand fracturing operation, sand in liquid cannot be prevented from eroding the spherical tooth seat, so that the sealing between the spherical tooth and the spherical tooth seat is failed, the oil sleeve is communicated, the internal pressure and the external pressure of the pipe column are balanced to cause the spherical tooth to retract, the pipe column is displaced, the packer is not sealed, and finally the operation is failed; meanwhile, due to the structure of the anchoring mechanism, when the pressure difference between the inside and the outside is too large, the pressure plate is stressed too much, so that the pressure plate is deformed, the screw is damaged and broken, and potential safety hazards exist when operation and tubular column recovery are carried out. And therefore improvements thereof are necessary.
Disclosure of Invention
The utility model aims to provide a: the utility model provides a simple structure, equipment convenience can effectively prevent the sand grain to the erosion of ball toothholder, guarantees hydraulic anchor stability, has solved simultaneously because of hydraulic anchor self structure reason the clamp plate warp easily appears and the hydraulic anchor of sand prevention mould of screw damage, fracture problem.
The technical scheme of the utility model is that:
the utility model provides a prevent hydraulic anchor of sand mould, it comprises top connection, casing, bush and sealed anchoring mechanism, its characterized in that: the upper joint is installed on the end head of one end of the shell in a threaded mode, the lining is arranged inside the shell on one side of the upper joint and in contact with the upper joint, the boss is arranged on the circumference of the shell, mounting holes are formed in the boss at intervals and are communicated with the center hole of the shell, and a sealing anchoring mechanism is installed in the mounting holes through a pressing plate.
The shell and the upper joint are fixedly connected through a fastening screw.
The shell is cylindrical, and a central hole of the shell is a diameter-variable stepped hole.
The bosses are uniformly distributed at 120 degrees in the axial direction, and overflow grooves are axially arranged on the outer circle of the shell between the bosses.
The mounting hole is a reducing hole, and the bottom end of the mounting hole is in a contraction shape.
The bushing is cylindrical, and sand control grooves are uniformly distributed on the circumference of the bushing in the radial direction.
The sand prevention groove is in a strip penetrating shape.
The sealed anchoring mechanism comprises a spherical tooth and a return spring, an assembly concave hole is formed in the center of the spherical tooth, the return spring is arranged in the assembly concave hole, the top end of the return spring is connected with the pressing plate in an abutting mode, and the spherical tooth is arranged in the mounting hole.
And milling teeth are arranged on the spherical teeth on two sides of the assembling concave hole.
And a dovetail groove is axially arranged on the boss on the outer circle of the shell corresponding to the mounting hole.
The pressing plate is in a strip shape, and the section of the pressing plate is trapezoidal.
The utility model has the advantages that:
the sand-proof hydraulic anchor is simple in structure and convenient to assemble, and the upper joint is matched with the central hole of the shell to limit the liner, so that the normal work of the hydraulic anchor is prevented from being influenced after the liner moves in the shell; the erosion of sand grains in the liquid to the shell can be effectively prevented through the sand prevention groove on the lining, meanwhile, the normal passing of the liquid is not influenced, and the liquid pressure is effectively transmitted to the spherical teeth, so that the anchoring function of the hydraulic anchor is more stable and reliable; the pressure plate of the hydraulic anchor adopts a double limiting mode of a dovetail groove on the shell and a fastening screw, so that the stress area of the pressure plate can be increased, the acting force on a unit area can be reduced, and potential safety hazards caused by deformation of the pressure plate, breakage and fracture of the screw can be eliminated; the circumferential surface of the hydraulic anchor is provided with a flow through groove, so that erosion to the shell during injection or circulation due to large discharge can be reduced.
Description of the drawings:
fig. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic cross-sectional view taken along the line A-A in FIG. 1;
FIG. 3 is a schematic cross-sectional view taken along the direction B-B in FIG. 1;
FIG. 4 is a schematic structural view of the housing of FIG. 1;
fig. 5 is a schematic view of the working state structure of the present invention.
In the figure: 1. the device comprises an upper connector, 2, a shell, 3, a bushing, 4, a sand prevention groove, 5, a mounting hole, 6, a spherical tooth, 7, a return spring, 8, a pressure plate, 9, a dovetail groove, 10, an overflowing groove, 11, a sleeve, 12, a boss, 13, a milling tooth, 14 and a fastening screw.
Detailed Description
The hydraulic anchor of this sand prevention mould comprises top connection 1, casing 2, bush 3 and sealed anchoring mechanism, and casing 2 is the tube-shape, and the centre bore of casing 2 is reducing step hole, and threaded mounting has top connection 1 on the one end of casing 2, through set up screw 14 fixed connection between casing 2 and the top connection 1, is provided with O shape sealing washer between casing 2 and the top connection 1, effectively guarantees the leakproofness between casing 2 and the top connection 1.
The inside bush 3 that is provided with of casing 2 of top connection 1 one side, bush 3 are cylindricly, and radial equipartition is provided with a plurality of sand control groove 4 on the circumference of bush 3, and sand control groove 4 is rectangular run through form, and the during operation, sand control groove 4 can allow liquid to pass through, can the separation sand grain simultaneously, prevents that the sand grain from eroding the sealed face of casing 2.
Bush 3 is connected with the contact of top connection 1, and in operation, through the circular bead cooperation of top connection 1 terminal surface and casing 2's centre bore, can form axial spacing to bush 3, prevents that axial displacement from appearing in casing 2 in bush 3.
3 bosses 12 which are axially arranged are uniformly distributed on the outer circumference of the shell 2 at 120 degrees, and overflow grooves 10 are axially arranged between the bosses 12; the function of the overflow groove 10 is: when injecting the big discharge capacity liquid flow or carrying out the liquid cycle operation in the oil pipe, can effectual reduction liquid flow to the erosion of casing 2, the interval is provided with 2 mounting holes 5 on each boss 12, and mounting hole 5 communicates with the centre bore of casing 2, and mounting hole 5 is the reducing hole, and the bottom of mounting hole 5 is the shrink form.
Install sealed anchoring mechanism through clamp plate 8 in the mounting hole 5, sealed anchoring mechanism comprises ball tooth 6 and reset spring 7, ball tooth 6 dress is in mounting hole 5, it is provided with the O shape sealing washer to slide between ball tooth 6 and the 5 inner walls of mounting hole, can effectively guarantee the leakproofness between ball tooth 6 and the mounting hole 5, because mounting hole 5 is the reducing hole, mounting hole 5 forms radially spacingly to ball tooth 6 to prevent that ball tooth 6 from entering into the centre bore to casing 2 through mounting hole 5. An assembly concave hole is formed in the center of the spherical tooth 6, a return spring 7 is arranged in the assembly concave hole, and the top end of the return spring 7 is in abutting connection with a pressing plate 8; the return spring 7 has the functions of: after the operation is finished and the hydraulic pressure in the oil pipe is released, the reset spring 7 pushes the spherical teeth 6 to reset through the self elasticity; and milling teeth 13 are arranged on the spherical teeth 6 at the two sides of the assembling concave hole.
The pressure plate 8 of the hydraulic anchor is long-strip-shaped, the section of the pressure plate 8 is trapezoid, a dovetail groove 9 is axially arranged on a boss 12 corresponding to the mounting hole 5, the pressure plate 8 is inserted on the boss 12 through the dovetail groove 9, and one end of the pressure plate 8 is fixedly connected with the boss 12 through a fastening screw 14. The pressing plate 8 is matched with the dovetail groove 9 on the shell 2, so that the stress area of the pressing plate 8 can be increased, the acting force on the unit area is reduced, and the potential safety hazard caused by deformation and easy breakage and fracture of screws due to uneven stress of the pressing plate 8 is prevented.
This hydraulic anchor of sand control type during operation, at first connect the ball seat on the lower extreme of this hydraulic anchor, then be connected this hydraulic anchor and other corresponding instruments, along with oil pipe is gone into in the pit assigned position back together, drop into suitable ball in to oil pipe, after ball income ball seat, to the inside shutoff that forms of oil pipe, thereby make the hydraulic pressure in the oil pipe outwards stretch out this hydraulic anchor's button 6, 11 inner walls of chucking sleeve pipe, from this the realization is to the anchor action of borehole operation instrument.
The method specifically comprises the following steps: after the ball goes into the ball seat, to the interior pressure of hitting of oil pipe, make the inside fluid pressure increase of oil pipe to make the inside fluid pressure increase of this hydraulic anchor casing 2, the liquid in the casing 2 passes through sand control groove 4 on the bush 3 and gets into to mounting hole 5 in, sand control groove 4 plays the filtering action to the liquid in the casing 2, effectively avoids the erosion of the gravel in the liquid to sealed face between button 6 and the mounting hole 5, in order to avoid the pressure release that the erosion leads to.
After liquid in the shell 2 enters the mounting hole 5, under the action of liquid pressure, the spherical teeth 6 and the milling teeth 13 are pushed to radially extend outwards on two sides of the pressing plate 8, meanwhile, in the process that the spherical teeth 6 extend outwards, the spherical teeth 6 extrude the return spring 7 through the matching with the pressing plate 8, so that energy is stored in the return spring, when the pressure difference inside and outside the shell 2 reaches a certain value, the milling teeth 13 on the spherical teeth 6 bite the inner wall of the sleeve 11, and therefore through the axial load of the milling teeth 13, the anchoring of the hydraulic anchor to the sleeve 11 is realized, and the axial movement of a pipe column is prevented.
After the production increasing operation is completed, the hydraulic pressure in the oil pipe is released, the reset spring 7 is in a compression state, the reset spring 7 pushes the spherical teeth 6 to reset radially under the action of the elastic force of the reset spring 7, and when the pressure difference between the inside and the outside of the shell 2 is reduced to a certain value, the spherical teeth 6 retract completely, so that the anchoring of the hydraulic anchor to the sleeve 11 is released, and the tubular column is recovered at the moment.
The hydraulic anchor of the sand prevention mold is matched with the central hole of the shell 2 through the upper joint 1, and axial limit can be formed on the lining 3, so that the normal work of the hydraulic anchor is prevented from being influenced after the lining 3 moves in the shell 2; the erosion of sand in the liquid to the sealing surface of the seat of the spherical tooth 6 can be effectively prevented through the sand prevention groove 4 on the lining 3, the normal passing of the liquid is not influenced, the liquid pressure is effectively transmitted to the spherical tooth 6, and the anchoring function of the hydraulic anchor is more stable and reliable; the pressure plate 8 of the hydraulic anchor adopts a double limiting mode of a dovetail groove 9 and a fastening screw 14 on the shell 2, so that the stress area of the pressure plate 8 can be increased, the acting force on a unit area is reduced, and potential safety hazards caused by deformation of the pressure plate 8, breakage and breakage of the screw are eliminated; the overflow groove 10 is designed on the circumferential surface of the hydraulic anchor, so that the erosion to the shell 2 caused by the injection or circulation of drilling fluid with large discharge capacity can be reduced, and the sand-proof hydraulic anchor has the advantages of simple structure, convenience in assembly and positive significance for improving the production efficiency.
The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.
Claims (10)
1. The utility model provides a prevent hydraulic anchor of sand mould, it comprises top connection (1), casing (2), bush (3) and sealed anchoring mechanism, its characterized in that: the upper joint (1) is installed on one end of the shell (2) through threads, a bushing (3) is arranged inside the shell (2) on one side of the upper joint (1), the bushing (3) is in contact connection with the upper joint (1), bosses (12) are arranged on the circumference of the shell (2), mounting holes (5) are formed in the bosses (12) at intervals, the mounting holes (5) are communicated with a center hole of the shell (2), and a sealing anchoring mechanism is installed in the mounting holes (5) through a pressing plate (8).
2. The sand control type hydraulic anchor of claim 1, wherein: the shell (2) is fixedly connected with the upper joint (1) through a fastening screw (14).
3. The sand control type hydraulic anchor of claim 1, wherein: the shell (2) is cylindrical, and a center hole of the shell (2) is a diameter-variable stepped hole.
4. The sand control type hydraulic anchor of claim 1, wherein: the bosses (12) are uniformly distributed at 120 degrees in the axial direction, and overflow grooves (10) are axially arranged on the outer circle of the shell (2) between the bosses (12).
5. The sand control type hydraulic anchor of claim 1, wherein: the mounting hole (5) is a diameter-variable hole, and the bottom end of the mounting hole (5) is in a contraction shape.
6. The sand control type hydraulic anchor of claim 1, wherein: the lining (3) is cylindrical, sand control grooves (4) are uniformly distributed on the circumference of the lining (3), and the sand control grooves (4) are rectangular.
7. The sand control type hydraulic anchor of claim 1, wherein: the sealing anchoring mechanism is composed of spherical teeth (6) and a return spring (7), an assembly concave hole is formed in the center of each spherical tooth (6), the return spring (7) is arranged in the assembly concave hole, the top end of the return spring (7) is connected with a pressing plate (8) in an abutting mode, and the spherical teeth (6) are installed in the installation holes (5).
8. The sand control type hydraulic anchor of claim 7, wherein: and milling teeth (13) are arranged on the spherical teeth (6) on the two sides of the assembling concave hole.
9. The sand control type hydraulic anchor of claim 7, wherein: and a dovetail groove (9) is axially arranged on a boss (12) on the excircle of the shell (2) corresponding to the mounting hole (5).
10. The sand control type hydraulic anchor of claim 1, wherein: the pressing plate (8) is in a long strip shape, and the section of the pressing plate (8) is trapezoidal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020482671.7U CN211924116U (en) | 2020-04-06 | 2020-04-06 | Hydraulic anchor of sand control type |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020482671.7U CN211924116U (en) | 2020-04-06 | 2020-04-06 | Hydraulic anchor of sand control type |
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| Publication Number | Publication Date |
|---|---|
| CN211924116U true CN211924116U (en) | 2020-11-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020482671.7U Active CN211924116U (en) | 2020-04-06 | 2020-04-06 | Hydraulic anchor of sand control type |
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| CN (1) | CN211924116U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113047811A (en) * | 2021-03-18 | 2021-06-29 | 成都叁能锐达能源科技有限公司 | Liquid flow control sliding sleeve |
-
2020
- 2020-04-06 CN CN202020482671.7U patent/CN211924116U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113047811A (en) * | 2021-03-18 | 2021-06-29 | 成都叁能锐达能源科技有限公司 | Liquid flow control sliding sleeve |
| CN113047811B (en) * | 2021-03-18 | 2022-12-27 | 成都叁能锐达能源科技有限公司 | Liquid flow control sliding sleeve |
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