CN221346844U

CN221346844U - Hydraulic anchor device

Info

Publication number: CN221346844U
Application number: CN202323527552.1U
Authority: CN
Inventors: 倪化龙; 倪若飞
Original assignee: YUEQING LEJI PETROLEUM MACHINERY PLANT
Current assignee: YUEQING LEJI PETROLEUM MACHINERY PLANT
Priority date: 2023-12-22
Filing date: 2023-12-22
Publication date: 2024-07-16
Anticipated expiration: 2033-12-22

Abstract

The utility model discloses a hydraulic anchor device, which comprises an anchor body, anchor claws, a pressing plate and a spring structure, wherein the anchor claws are arranged in through holes of the anchor body, the pressing plate is arranged at the outer port of the through holes, one end of each anchor claw is provided with a mounting through groove parallel and opposite to the pressing plate, the inner side surface of each pressing plate is provided with a stepped groove and a positioning groove with sequentially increasing depth, the length of each stepped groove is larger than that of each mounting through groove, the stepped grooves are formed on the outer sides of the positioning grooves in a surrounding mode, the relative movement distance between each anchor claw and each pressing plate can be increased through designing the stepped grooves, the travel distance of each anchor claw extending out of the anchor body is increased, even if a pipe column is subjected to local expansion deformation due to geological external force, the anchor claws and the pipe column can still be ensured to be kept in tight contact, reliable anchoring of the pipe column is realized, upward axial movement of the pipe column is prevented, the anchoring force of a product in working process is ensured, and the service performance of the product is improved.

Description

Hydraulic anchor device

Technical Field

The utility model relates to the technical field of downhole anchoring tools, in particular to a hydraulic anchor device.

Background

The hydraulic anchor is a well anchoring tool commonly used for fixing a pipe column in high-pressure operation such as underground water injection, fracturing, acidification and the like of an oil field. The fluke of the hydraulic anchor is of a piston structure, the fluke can extend outwards under the hydraulic action in the anchor body, and the biting teeth on the outer end face of the fluke can be anchored with the inner wall of the pipe column to fix the pipe column; when the high-pressure liquid in the oil pipe is discharged, the fluke returns under the action of the elastic force of the spring, and the fluke is pulled out along with the pipe column.

For example, chinese patent document CN201865633U discloses a hydraulic anchor, which comprises an anchor body, flukes and a pressing plate, wherein nine drilled flukes are provided on the anchor body, three flukes are uniformly distributed on the circumference of the anchor body, flukes are installed in the flukes, each fluke is formed with a fluke counter bore, the pressing plate is fixedly connected on the anchor body through a screw and is blocked at a port of the fluke bore, a pressing plate counter bore corresponding to the fluke counter bore is formed on the pressing plate, and a spring is installed between the fluke counter bore and the pressing plate counter bore. The existing hydraulic anchor still has the following problems in actual use: the hydraulic anchor is large in underground working pressure, the fluke can outwards move under the pressure action in the anchor body, so that the fluke is anchored with the inner wall of the pipe column, the pipe column is influenced by geological external force and is easy to generate local expansion deformation, the distance that the fluke extends out of the anchor body is short, the fluke and the pipe column are not tightly contacted, the anchoring force of the product in working is influenced, and the spring is excessively compressed by the fluke and is fatigued and damaged.

Disclosure of utility model

Therefore, the technical problem to be solved by the utility model is to solve the problems that the contact between the fluke and the pipe column is not tight and the working anchoring force of a product is influenced because the pipe column in the prior art is influenced by geological external force and can cause local expansion deformation.

In order to solve the technical problems, the utility model provides a hydraulic anchor device, which comprises an anchor body, flukes, a pressing plate and a spring structure, wherein a plurality of through holes are formed in the wall of the anchor body in a penetrating manner along the radial direction of the wall of the anchor body, each through hole is internally provided with the flukes, the pressing plate is arranged at the outer port of the through hole and is provided with a gap for the flukes to extend out, one end of the flukes, which faces the pressing plate, is provided with a mounting through groove which extends in the radial direction and penetrates through the side wall of the flukes, and the pressing plate and the mounting through groove are arranged in parallel and opposite manner; the inner side of the pressing plate is provided with a stepped groove and a positioning groove, the depth of the stepped groove is sequentially increased, the stepped groove is formed on the outer side of the positioning groove in a surrounding mode, the spring structure is arranged between the positioning groove and the mounting through groove, the length of the stepped groove is larger than that of the mounting through groove, the fluke is pressed to press the spring structure when moving outside the through hole, and the pressing plate is contained in the mounting through groove.

In the hydraulic anchor device, the positioning groove and the stepped groove are concentrically arranged on the inner side surface of the pressing plate, and the bottom surface of the mounting through groove is driven to contact with the bottom surface of the stepped groove when the fluke moves to the maximum travel outwards of the through hole.

In the hydraulic anchor device, the cross section of the inner side surface of the pressing plate, the stepped groove and the positioning groove is in a multi-stage stepped shape.

In the hydraulic anchor device, a central groove opposite to the positioning groove is formed in the bottom surface of the mounting through groove, and two ends of the spring structure are respectively arranged in the positioning groove and the central groove.

In the hydraulic anchor device, the spring structure comprises a first pressure spring and a second pressure spring concentrically arranged between the positioning groove and the central groove, and the second pressure spring is sleeved on the outer side of the first pressure spring.

In the hydraulic anchor device, the first compression spring and the second compression spring are arranged in opposite spiral directions.

In the hydraulic anchor device, one end of the fluke is provided with a plurality of biting tooth structures distributed on two sides of the installation through hole, an annular groove is formed in the peripheral side wall of the fluke, and a sealing ring is embedded in the annular groove.

In the hydraulic anchor device, a plurality of groups of anchor jaw hole units are uniformly distributed on the anchor body along the circumferential direction, and each group of anchor jaw hole units comprises three through holes which are arranged on the wall of the anchor body at intervals along the axial direction of the anchor body.

In the hydraulic anchor device, the pressing plate is arranged between the three through holes of the fluke hole unit along the axial extension of the anchor body, three groups of concentrically arranged stepped grooves and positioning grooves are correspondingly arranged on the pressing plate, the anchor body is provided with the accommodating groove which is suitable for accommodating the pressing plate, the accommodating groove is connected to the outer port of the through hole, and the pressing plate and the anchor body are fixedly connected through the fastening structure.

Compared with the prior art, the technical scheme of the utility model has the following advantages:

1. According to the hydraulic anchor device provided by the utility model, the stepped groove and the positioning groove with sequentially increasing depth are formed in the inner side surface of the pressing plate, the installation through groove parallel and opposite to the pressing plate is formed in one end of the anchor jaw, the length of the stepped groove is larger than that of the installation through groove, the relative moving distance between the anchor jaw and the pressing plate can be increased through designing the stepped groove, so that the travel distance of the anchor jaw extending out of the anchor body is increased, and the hydraulic anchor device has the advantages that even if a pipe column is subjected to local expansion deformation due to the influence of geological external force, the anchor jaw can be still ensured to be in close contact with the pipe column due to the fact that the movement travel of the anchor jaw is subjected to lifting compensation, so that the anchor jaw is contacted with the pipe column under the action of hydraulic pressure to generate higher extrusion stress, reliable anchoring of the pipe column is realized, upward axial movement of the pipe column is prevented, the anchoring force of a product in working process is ensured, and the service performance of the product is improved.

2. According to the hydraulic anchor device provided by the utility model, the spring structure is arranged between the positioning groove of the pressing plate and the central groove of the anchor jaw, the anchor jaw is blocked when being contacted with the bottom surface of the stepped groove in an outward moving manner, and meanwhile, the maximum travel distance is also reached, and as a certain height difference exists between the stepped groove and the positioning groove, the compression degree of the anchor jaw on the spring structure can be reduced, the compression amount of the spring structure extruded by the anchor jaw is ensured to be in a bearable range, the compressible allowance of the spring is kept, the situation that the spring structure is damaged due to elastic fatigue caused by excessive extrusion of the anchor jaw can be avoided, and the service life and the service performance of the spring structure are improved.

3. In the hydraulic anchor device provided by the utility model, the spring structure consists of the first pressure spring and the second pressure spring which are concentrically arranged, and the second pressure spring is sleeved on the outer side of the first pressure spring, so that the double-spring structure design can increase the elastic acting force of the fluke to realize automatic resetting, the fluke is easier to reset, the safety and the service life of the hydraulic anchor are improved, and the diameter of the second pressure spring is larger than that of the first pressure spring, and is oppositely arranged according to the spiral direction of the first pressure spring and the second pressure spring, so that the phenomenon of overlapping and staggering between the first pressure spring and the second pressure spring can be prevented, and the stability and the reliability of the installation of the two springs are ensured.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below.

FIG. 1 is a schematic view of a hydraulic anchor device of the present utility model in semi-section;

FIG. 2 is a schematic view of a partially enlarged construction of the hydraulic anchor device of FIG. 1;

FIG. 3 is a schematic plan view of an inventive platen;

FIG. 4 is a schematic cross-sectional view of an inventive platen;

FIG. 5 is a front view of the fluke of the utility model;

FIG. 6 is a top view of the fluke of the utility model;

Reference numerals illustrate: 1. an anchor body; 2. a through hole; 3. flukes; 31. installing a through groove; 32. a central groove; 33. a tooth biting structure; 34. an annular groove; 4. a pressing plate; 41. a positioning groove; 42. a stepped groove; 5. a spring structure; 51. a first compression spring; 52. a second compression spring; 6. and a fastening structure.

Detailed Description

The following description of the embodiments of the present utility model will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the utility model are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

In the description of the present utility model, it should be noted that the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

Examples

The present embodiment is specifically described below with reference to the accompanying drawings:

The embodiment provides a hydraulic anchor device as shown in fig. 1-6, which comprises an anchor body 1, flukes 3, a pressing plate 4 and a spring structure 5, wherein a plurality of through holes 2 are formed in the pipe wall of the anchor body 1 in a penetrating manner along the radial direction of the pipe wall, the flukes 3 are installed in each through hole 2, the pressing plate 4 is installed at the outer port of each through hole 2 and is provided with a gap for the flukes 3 to extend out, one end of each flukes 3, facing the pressing plate 4, is provided with an installation through groove 31 which extends in the radial direction and penetrates through the side wall of each flukes 3, and the pressing plate 4 and the installation through groove 31 are oppositely arranged in parallel; the inner side of clamp plate 4 is provided with the ladder groove 42 and the constant head tank 41 that the degree of depth increases gradually, the ladder groove 42 surrounds the shaping and is in the constant head tank 41 outside, spring structure sets up between constant head tank 41 and the installation logical groove 31, its effect is the drive anchor claw 3 realizes automatic return, the length of ladder groove 42 is greater than the length of installation logical groove 31, anchor claw 3 receives when pressing to through-hole 2 moves outward extrudees spring structure 5 to make clamp plate 4 hold in installation logical groove 31, pass through installation logical groove 31 for after clamp plate 4 gave way in order to realize that the anchor claw stretches out the anchor body.

The above embodiment is a core technical solution of this embodiment, through the step groove 42 and the positioning groove 41 with sequentially increasing depth are provided on the inner side surface of the pressing plate, and the installation through groove 31 parallel and opposite to the pressing plate is provided on one end of the fluke, the design of the step groove 42 can increase the relative movement distance between the fluke 3 and the pressing plate 4, thereby increasing the travel distance of the fluke 3 extending out of the anchor body 1, and the design has the advantages that even if the pipe column is subjected to local expansion deformation due to the influence of geological external force, due to the lifting compensation of the movement travel of the fluke 3, the tight contact between the fluke 3 and the pipe column can be ensured, the fluke is enabled to be contacted with the pipe column under the hydraulic action to generate higher extrusion stress, the reliable anchoring of the pipe column is realized, the upward axial movement of the pipe column is prevented, the anchoring force of the product during working is ensured, and the service performance of the product is improved.

As shown in fig. 1-4, the positioning groove 41 and the step groove 42 are concentrically arranged on the inner side surface of the pressing plate 4, the groove walls of the positioning groove 41 and the step groove 42 are respectively in arc shapes, the inner side surface of the pressing plate adopting structural design, the cross section shape between the step groove 42 and the positioning groove 41 is in multi-stage step shape, the movement distance of the fluke 3 extending out of the through hole is increased through the step groove 42, and the requirement of anchoring force between the fluke 3 and the pipe column is met, therefore, when the fluke 3 is subjected to the pressure action of the inside of the anchor body, the fluke 3 drives the bottom surface of the installation through groove 31 to contact with the bottom surface of the step groove 42, namely, the fluke 3 is expressed to move outwards to the maximum stroke.

The specific arrangement of the spring structure is described in detail below with reference to fig. 1-2:

The bottom surface of the installation through groove 31 is provided with a central groove 32 opposite to the positioning groove 41, two ends of the spring structure 5 are respectively arranged on the positioning groove 41 and the central groove 32, the structure is arranged, according to the fact that the anchor claw 3 is blocked when being in outward moving contact with the bottom surface of the stepped groove 42, meanwhile, the maximum travel distance is reached, due to the fact that a certain height difference exists between the stepped groove 42 and the positioning groove 41, the compression degree of the anchor claw 3 on the spring structure 5 can be reduced, the compression amount of the spring structure 5 extruded by the anchor claw 3 is ensured to be in a bearable range, the spring is enabled to keep a compressible allowance, the situation that elastic fatigue is damaged due to excessive extrusion of the spring structure 5 by the anchor claw 3 can be avoided, and the service life and the service performance of the spring structure are improved.

Further preferably, the spring structure 5 includes a first compression spring 51 and a second compression spring 52 concentrically disposed between the positioning groove 41 and the central groove 32, the second compression spring 52 is sleeved on the outer side of the first compression spring 51, and the positioning groove 41 and the central groove 32 play a role in positioning and mounting the two compression springs, so as to prevent the two compression springs from generating a phenomenon of offset of mounting positions, and the mounting is stable and reliable. The double-spring structure 5 can increase the elastic acting force of the fluke 3 for realizing automatic resetting, so that the fluke 3 is easier to reset, the safety and the service life of the hydraulic anchor are improved, and the diameter of the second pressure spring is larger than that of the first pressure spring, and the double-spring structure is oppositely arranged according to the spiral directions of the first pressure spring 51 and the second pressure spring 52, so that the phenomenon of overlapping and staggering between the first pressure spring and the second pressure spring can be prevented, and the stability and the reliability of installation of the two springs are ensured.

In this embodiment, one end of the fluke 3 is provided with a plurality of biting tooth structures 33 distributed on two sides of the installation through hole 2, an annular groove 34 is formed in the peripheral side wall of the fluke 3, a sealing ring is embedded in the annular groove 34, and sealing connection between the fluke 3 and the through hole 2 is achieved through the sealing ring, so that leakage accidents are prevented.

As shown in fig. 1, three groups of fluke hole units are uniformly distributed on the anchor body 1 along the circumferential direction, each group of fluke hole units comprises three through holes 2 which are arranged on the wall of the anchor body 1 along the axial direction of the anchor body 1 at intervals, three pressing plates 4 are arranged on the valve body corresponding to the three groups of fluke hole units, three groups of fluke 3 are arranged corresponding to the three groups of fluke hole units, the pressing plates 4 are arranged between the three through holes 2 of the fluke hole units along the axial direction of the anchor body 1 in an extending manner, three groups of concentrically arranged stepped grooves 42 and positioning grooves 41 are correspondingly arranged on the pressing plates 4, the holding grooves which are suitable for accommodating the pressing plates 4 are arranged on the anchor body 1 and are connected at the outer ports of the through holes 2, the pressing plates 4 are fixedly connected with the anchor body 1 through fastening structures 6, and the fastening structures 6 comprise threaded holes which are arranged in the holding grooves, and fixing screws which penetrate through the pressing plates and are fixedly connected with the threaded holes.

The hydraulic anchor is matched with an oil pump for use, and the working process is as follows: when the pressure on the pump rises, the internal pressure of the anchor body pushes the fluke out of the anchor body and anchors the fluke on the oil well pipe column, so that the anchoring action is realized, and the oil pipe is prevented from telescoping; when the anchoring is not needed, the pressure of the oil pipe is released, so that the anchor fluke returns under the elastic action of the spring structure, the anchoring action is released, and the oil well pipe column can be smoothly lifted.

It is apparent that the above examples are given by way of illustration only and are not limiting of the embodiments. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. While still being apparent from variations or modifications that may be made by those skilled in the art are within the scope of the utility model.

Claims

1. The utility model provides a hydraulic anchor device, includes anchor body (1), fluke (3), clamp plate (4) and spring structure (5), radially run through along it on anchor body (1) pipe wall and be equipped with a plurality of through-holes (2), every install fluke (3) in through-hole (2), clamp plate (4) are installed in the outer port department of through-hole (2) and are left the space that can supply fluke (3) to stretch out, the one end of fluke (3) towards clamp plate (4) is provided with along radial extension through-hole (31) of fluke (3) lateral wall, clamp plate (4) with installation through-hole (31) parallel relative setting; the method is characterized in that: the inner side of clamp plate (4) is provided with ladder groove (42) and constant head tank (41) that the degree of depth increases gradually, ladder groove (42) are in around the shaping outside of constant head tank (41), spring structure sets up between constant head tank (41) and installation logical groove (31), the length of ladder groove (42) is greater than the length of installation logical groove (31), extrusion spring structure (5) when fluke (3) pressurized outwards remove to through-hole (2) to make clamp plate (4) hold in installation logical groove (31).

2. A hydraulic anchor device according to claim 1, wherein: the positioning groove (41) and the step groove (42) are concentrically arranged on the inner side surface of the pressing plate (4), and the anchor fluke (3) drives the bottom surface of the mounting through groove (31) to contact with the bottom surface of the step groove (42) when moving to the maximum travel outside the through hole (2).

3. A hydraulic anchor device according to claim 2, wherein: the cross-sectional shapes of the inner side surface of the pressing plate (4), the stepped groove (42) and the positioning groove (41) are multi-stage step shapes.

4. A hydraulic anchor device according to claim 3, wherein: the bottom surface of the installation through groove (31) is provided with a central groove (32) opposite to the positioning groove (41), and two ends of the spring structure (5) are respectively arranged on the positioning groove (41) and the central groove (32).

5. A hydraulic anchor device according to any one of claims 1-4, wherein: the spring structure (5) comprises a first pressure spring (51) and a second pressure spring (52) which are concentrically arranged between the positioning groove (41) and the central groove (32), and the second pressure spring (52) is sleeved on the outer side of the first pressure spring (51).

6. A hydraulic anchor device according to claim 5, wherein: the first pressure spring and the second pressure spring are arranged in opposite spiral directions.

7. A hydraulic anchor device according to claim 6, wherein: one end of each fluke (3) is provided with a plurality of biting tooth structures (33) distributed on two sides of the installation through hole (2), annular grooves (34) are formed in the peripheral side wall of each fluke (3), and sealing rings are embedded in the annular grooves (34).

8. A hydraulic anchor device according to claim 1, wherein: the anchor body (1) is provided with a plurality of groups of anchor jaw hole units uniformly distributed along the circumferential direction, and each group of anchor jaw hole units comprises three through holes (2) which are arranged on the pipe wall of the anchor body (1) at intervals along the axial direction of the anchor body (1).

9. A hydraulic anchor device according to claim 8, wherein: the clamp plate (4) along the axial extension of anchor body (1) set up in between three through-hole (2) of fluke hole unit, and correspond be equipped with ladder groove (42) and constant head tank (41) that three group set up with one heart on clamp plate (4), be provided with on anchor body (1) and be fit for holding the accommodation groove of clamp plate (4), the accommodation groove is connected in the outer port department of through-hole (2), keep fixedly linking to each other through fastening structure (6) between clamp plate (4) and anchor body (1).