CN214997542U - High-bearing-pressure hydraulic anchor - Google Patents

Abstract

The utility model discloses a high pressure-bearing hydraulic anchor, including the anchor body, the anchor tooth, elastic component and spacing subassembly, the anchor body is provided with a plurality of anchor eyes, the middle part of spacing subassembly is provided with the through-hole, spacing subassembly is connected with the one end that the kerve pipe was kept away from to the anchor eye, the anchor tooth sets up in the anchor eye, the anchor tooth includes upper portion fluke and lower part stock, lower part stock and anchor eye sealing connection, the lower part stock passes through elastic component and is connected with spacing subassembly, the upper portion fluke passes elastic component and through-hole and external butt in proper order, the diameter of lower part stock is greater than the diameter that the diameter of through-hole is greater than the upper portion fluke. The utility model discloses in, when starting hydraulic anchor seat seal, exert pressure to the anchor tooth through the kerf pipe, order about the anchor tooth and outwards stretch out, spacing subassembly restriction anchor tooth's home range simultaneously makes the anchor tooth no longer continue to stretch out after stretching out the certain distance, realizes not changing operations such as sand washing well flushing under the high interior pressure operating mode of tubular column, and after hydraulic anchor pressure release, the anchor tooth resumes at original state under elastic component's effect.

Description

High-bearing-pressure hydraulic anchor

Technical Field

The utility model relates to an oil gas field borehole operation hydraulic anchor instrument technical field especially relates to a high pressure-bearing hydraulic anchor.

Background

In the process of oilfield development operation, the hydraulic anchor is an effective common tubular column anchoring device and is mainly used for underground operations such as hydraulic fracturing, hydraulic sand blasting cutting, perforation and the like of an oil-gas well. Under the general condition, the hydraulic anchor is lowered to a designed position along with an oil pipe, under the action of pressure in the oil pipe, the anchor teeth are gradually increased along with the pressure to extend out of the body, so that the anchor teeth are clamped on the inner wall of the casing pipe, the pipe string is prevented from being displaced and losing efficacy during working, and the effect of anchoring the pipe string is achieved. When the hydraulic anchor is unsealed, the pressure in the oil pipe is removed, the anchor teeth are retracted under the elastic action of the high-elasticity spring, and the hydraulic anchor can be unsealed.

The use of current hydraulic anchor must use in the pit shaft, and the anchor tooth can't bear higher internal pressure operating mode under the unsupported condition, has a series of problems in practical application: for example, in tail pipe suspended completion, the inner diameter of the upper borehole of a tail pipe hanger is generally larger than that of the lower borehole, after a downhole string completes operation in the lower borehole, if sand washing operation needs to be performed in the upper borehole, if the string is provided with a hydraulic anchor, the string needs to be replaced frequently, and the sand washing string is reconfigured to operate, so that the operation efficiency is influenced.

Disclosure of Invention

In order to overcome the defects of the prior art, the utility model aims to provide a high pressure-bearing hydraulic anchor, it can solve the pressure-bearing capacity of hydraulic anchor under the condition of no support, and the construction process is complicated, problem that the operating efficiency is low.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

a high pressure bearing hydraulic anchor comprises an anchor body, a plurality of anchor teeth, a through hole and a limiting assembly, wherein the inside of the anchor body is provided with a slit pipe, the anchor teeth are used for anchoring a pipe column, the elastic assembly is sleeved on the anchor teeth, the limiting assembly is used for limiting the displacement of the anchor teeth, the middle part of the limiting assembly is provided with a through hole communicated with the anchor holes, the limiting assembly is connected with one end, away from the slit pipe, of the anchor holes, the anchor teeth are arranged in the anchor holes, each anchor tooth comprises an upper anchor fluke and a lower anchor seat connected to one end of the upper anchor fluke, the lower anchor seat is in sealing connection with the anchor holes, one end of the elastic assembly is connected with a lower anchor seat, the other end of the elastic assembly is connected with one end, close to the anchor holes, of the limiting assembly, the upper anchor fluke sequentially penetrates through the elastic assembly and the through hole to be abutted against the outside, the diameter of the lower anchor seat is larger than that of the elastic assembly, and the diameter of the elastic assembly is larger than that of the through hole, the diameter of the through hole is larger than that of the upper anchor fluke; the slotted pipe is used for applying pressure to the lower anchor seat of the anchor tooth in the anchor hole so as to drive the upper anchor fluke of the anchor tooth to move in the direction away from the anchor hole; and the elastic component is used for driving the upper fluke of the anchor tooth to move towards the direction close to the anchor hole through the lower anchor seat.

Preferably, the hydraulic anchor further comprises an upper connector female buckle used for connecting the upper high pressure bearing hydraulic anchor and a lower connector male buckle used for connecting the lower high pressure bearing hydraulic anchor, the upper connector female buckle is connected with one end of the anchor body through a screw, and the lower connector male buckle is connected with the other end of the anchor body through a screw.

Preferably, the limiting assembly comprises a pressing plate fixedly connected to the anchor body and a limiting sleeve connected with the elastic assembly, the through hole is formed in the pressing plate corresponding to the anchor hole, the limiting sleeve is connected with one end, away from the slotted pipe, of the anchor hole, and the through hole is communicated with the anchor hole through the limiting sleeve.

Preferably, the elastic component is a spring.

Preferably, the anchor rod further comprises a sealing ring, and the lower anchor seat is connected with the anchor hole in a sealing mode through the sealing ring.

Preferably, the anchor holes are distributed on the anchor body along the radial direction.

Compared with the prior art, the beneficial effects of the utility model reside in that: the distance that outwards stretches out when bearing high pressure is restricted the anchor tooth through spacing subassembly, it is concrete, when starting hydraulic anchor seat seal, exert pressure to the lower part anchor socket of anchor tooth through the slotted pipe, extrusion elastic component, the upper portion fluke of ordering about the anchor tooth passes spacing subassembly and outwards stretches out, spacing subassembly restriction anchor tooth's home range this moment, the upper portion fluke that makes the anchor tooth no longer continues to stretch out after stretching out the certain distance, realize not trading operation such as sand washing well flushing under the high internal pressure operating mode of tubular column, when hydraulic anchor pressure release, the anchor tooth resumes at original state under elastic component's effect.

Drawings

Fig. 1 is a schematic structural view of the high pressure bearing hydraulic anchor of the present invention.

Fig. 2 is an enlarged schematic view of region a in fig. 1.

In the figure: 1-upper joint female buckle; 2-lower joint male buckle; 3-an anchor body; 4-slotting the tube; 5-anchor hole; 6-pressing a plate; 7-upper fluke; 8-lower anchorage; 9-a limiting sleeve; 10-an elastic component; 11-sealing ring.

Detailed Description

The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, and it will be understood that they are presented herein only to illustrate and explain the present invention, and not to limit the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, 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 invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The invention will be further described with reference to the accompanying drawings and specific embodiments:

as shown in fig. 1-2, a high pressure bearing hydraulic anchor comprises an anchor body 3 with a slit pipe 4 arranged inside, a plurality of anchor teeth for anchoring a pipe column, an elastic component 10 embedded on the anchor teeth, and a limiting component for limiting the displacement of the anchor teeth, wherein the anchor body 3 is provided with a plurality of anchor holes 5, the middle part of the limiting component is provided with a through hole communicated with the anchor holes 5, the limiting component is connected with one end of the anchor holes 5 far away from the slit pipe 4, the anchor teeth are arranged in the anchor holes 5, the anchor teeth comprise an upper anchor fluke 7 and a lower anchor seat 8 connected with one end of the upper anchor fluke 7, preferably, the anchor teeth can be integrally formed or independently processed and assembled, the lower anchor seat 8 is hermetically connected with the anchor holes 5, one end of the elastic component 10 is connected with the lower anchor seat 8, and the other end of the elastic component 10 is connected with one end of the limiting component close to the anchor holes 5, the upper anchor fluke 7 sequentially penetrates through the elastic assembly 10 and the through hole to be abutted against the outside, the diameter of the lower anchor block 8 is larger than that of the elastic assembly 10, the diameter of the elastic assembly 10 is larger than that of the through hole, and the diameter of the through hole is larger than that of the upper anchor fluke 7; the slotted pipe 4 is used for applying pressure to a lower anchor seat 8 of an anchor tooth in the anchor hole 5 so as to drive an upper anchor claw 7 of the anchor tooth to move in a direction away from the anchor hole 5; the elastic assembly 10 is used for driving the upper fluke 7 of the anchor tooth to move towards the direction close to the anchor eye 5 through the lower anchor seat 8.

Specifically, the anchor holes 5 are radially distributed on the anchor body 3 and penetrate through the anchor body 3, as shown in fig. 1, in this embodiment, 4 anchor holes 5 are distributed on the anchor body 3 in the same axial direction, an included angle between any two adjacent rows of the anchor holes is 120 °, the anchor teeth are movably arranged in the anchor holes 5, lower anchor seats 8 of the anchor teeth are hermetically connected with the anchor holes 5 through sealing rings 11, preferably, the limiting assembly comprises a pressing plate 6 fixedly connected to the anchor body 3 and a limiting sleeve 9 connected with an elastic assembly 10, the through hole is arranged on the pressing plate 6 corresponding to the anchor hole 5, preferably, the pressing plate 6 is fixedly connected with the anchor body 3 through a countersunk head pin, the limiting sleeve 9 is connected with one end of the anchor hole 5 far away from the slit pipe 4, preferably, the limiting sleeve 9 is connected with the anchor hole 5 through a thread, the through hole is communicated with the anchor hole 5 through the limiting sleeve 9, furthermore, the elastic component 10 is a spring, the spring is sleeved on the upper anchor fluke 7, and the lower anchor seat 8 is connected with the limiting sleeve 9 through the spring.

The high-pressure-bearing hydraulic anchor is characterized by further comprising an upper connector female buckle 1 used for connecting an upper-stage high-pressure-bearing hydraulic anchor and a lower connector male buckle 2 used for connecting a lower-stage high-pressure-bearing hydraulic anchor, wherein the upper connector female buckle 1 is connected with one end of the anchor body 3 through a screw, and the lower connector male buckle 2 is connected with the other end of the anchor body 3 through a screw.

In the embodiment, when the hydraulic anchor is seated in the casing, the lower anchor seat 8 of the anchor tooth extrudes the spring under the action of internal pressure to drive the upper fluke 7 to extend outwards, penetrate through the limiting sleeve 9 and the through hole on the pressure plate 6 and be anchored to the inner wall of the casing; when the hydraulic anchor is not supported outside, the convex anchor teeth are limited by one end of the limiting sleeve 9 close to the anchor hole 5, the upper anchor fluke 7 does not extend out any more after extending out a certain distance, and sand washing and well washing operations under the working condition of high internal pressure of the pipe column are realized. When the hydraulic anchor is decompressed, namely the interior does not apply pressure to the lower anchor seat 8 of the anchor tooth any more, the anchor tooth is restored to the original state under the action of the spring and retreats into the anchor hole 5.

Various other modifications and changes may be made by those skilled in the art based on the above-described technical solutions and concepts, and all such modifications and changes are intended to fall within the scope of the claims.

Claims (6)

1. The utility model provides a high pressure-bearing hydraulic anchor which characterized in that: comprises an anchor body, a plurality of anchor teeth, an elastic component and a limiting component, wherein the inside of the anchor body is provided with a slotted pipe, the anchor teeth are used for anchoring a pipe column, the elastic component is sleeved on the anchor teeth, the limiting component is used for limiting the displacement of the anchor teeth, the anchor body is provided with a plurality of anchor holes, the middle part of the limiting component is provided with a through hole communicated with the anchor holes, the limiting component is connected with one end of the anchor hole far away from the slotted pipe, the anchor teeth are arranged in the anchor hole, the anchor teeth comprise upper anchor flukes and lower anchor seats connected to one ends of the upper anchor flukes, the lower anchor seats are hermetically connected with anchor holes, one end of the elastic component is connected with the lower anchor seat, the other end of the elastic component is connected with one end of the limiting component close to the anchor hole, the upper anchor fluke sequentially penetrates through the elastic component and the through hole to be abutted against the outside, the diameter of the lower anchor seat is larger than that of the elastic component, the diameter of the elastic component is larger than that of the through hole, and the diameter of the through hole is larger than that of the upper anchor fluke; the slotted pipe is used for applying pressure to the lower anchor seat of the anchor tooth in the anchor hole so as to drive the upper anchor fluke of the anchor tooth to move in the direction away from the anchor hole; and the elastic component is used for driving the upper fluke of the anchor tooth to move towards the direction close to the anchor hole through the lower anchor seat.

2. A high pressure bearing hydraulic anchor as claimed in claim 1, wherein: the hydraulic anchor is characterized by further comprising an upper connector female buckle used for connecting the upper high-pressure-bearing hydraulic anchor and a lower connector male buckle used for connecting the lower high-pressure-bearing hydraulic anchor, wherein the upper connector female buckle is connected with one end of the anchor body through a screw, and the lower connector male buckle is connected with the other end of the anchor body through a screw.

3. A high pressure bearing hydraulic anchor as claimed in claim 1, wherein: the limiting assembly comprises a pressing plate fixedly connected to the anchor body and a limiting sleeve connected with the elastic assembly, the through hole is arranged on the pressing plate corresponding to the anchor hole, the limiting sleeve is connected with one end, away from the slotted pipe, of the anchor hole, and the through hole is communicated with the anchor hole through the limiting sleeve.

4. A high pressure bearing hydraulic anchor as claimed in claim 1, wherein: the elastic component is a spring.

5. A high pressure bearing hydraulic anchor as claimed in claim 1, wherein: the lower anchor seat is connected with the anchor hole in a sealing mode through the sealing ring.

6. A high pressure bearing hydraulic anchor as claimed in claim 1, wherein: the anchor holes are distributed on the anchor body along the radial direction.

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