CN219910689U

CN219910689U - Sand-proof hydraulic anchor

Info

Publication number: CN219910689U
Application number: CN202220425984.8U
Authority: CN
Inventors: 朱甜甜; 樊海龙; 朱荣; 许祥红
Original assignee: YANCHENG XINYUAN PETROCHEMICAL MACHINERY CO Ltd
Current assignee: YANCHENG XINYUAN PETROCHEMICAL MACHINERY CO Ltd
Priority date: 2022-03-01
Filing date: 2022-03-01
Publication date: 2023-10-27
Anticipated expiration: 2032-03-01

Abstract

The utility model provides a sand-preventing hydraulic anchor, which belongs to the field of hydraulic anchors and comprises an anchor body, a plurality of flukes embedded on the anchor body, a pressing strip embedded on the anchor body, a spring arranged between the pressing strip and the flukes and a sand-preventing pipe, wherein the sand-preventing pipe consists of a pipe body I and a pipe body II, the pipe body I is inserted into the anchor body, and the pipe body II is in threaded connection with the anchor body. The sand control pipe is of a segmented structure, and the gap between the upper position and the lower position of the pipe body I in the anchor body can be adjusted through the pipe body II according to different underground environments, so that the gap is far smaller than a slit gap, and the sand control effect is better.

Description

Sand-proof hydraulic anchor

Technical Field

The utility model belongs to the field of hydraulic anchors, and particularly relates to a sand control hydraulic anchor.

Background

The hydraulic anchor is an anchoring tool for underground operation pipe columns such as hydraulic fracturing of oil (gas) wells, water well injection reconstruction, hydraulic sand blasting, cutting (or sand blasting perforation) and the like, and can prevent up-down creeping of the packer caused by pressure fluctuation and prevent oil pipe top caused by uncoordinated up-down packer or damage of the lower packer during fracturing.

In carrying out the present utility model, the inventors have found that the existing hydraulic anchors have at least the following drawbacks:

sand control pipe in the anchor body is whole slot, and sand control pipe gap is between 0.2-0.3, receives the influence of pressure in the pit and can make the gap increase to appear blocking up sand, and the anchor tooth is retrieved often and is caused can not normally retrieve because of sand card to cause the fluke hole to block up, makes the operation tubular column can not normally play, causes the oil-water well to overhaul even.

Disclosure of Invention

Based on the background problem, the utility model aims to provide the sand control hydraulic anchor, a sand control pipe is arranged in the anchor body and consists of a pipe body I and a pipe body II, the pipe body I is directly inserted in the anchor body, the pipe body II is in threaded connection with the anchor body, and the sand control effect is better.

In order to achieve the above purpose, the technical scheme provided by the embodiment of the utility model is as follows:

the sand control hydraulic anchor comprises an anchor body, a plurality of flukes embedded on the anchor body, a pressing strip embedded on the anchor body, a spring arranged between the pressing strip and the flukes, and further comprises:

the sand control pipe comprises a pipe body I and a pipe body II, wherein the pipe body I is inserted into the anchor body, and the pipe body II is in threaded connection with the anchor body.

Further, a plurality of fluke holes are formed in the periphery of the anchor body, extend along the radial direction and are communicated with the inner cavity of the anchor body;

grooves are formed in the periphery of the anchor body along the axial direction, and the grooves span across a plurality of fluke holes distributed along the axial direction;

the fluke hole is internally provided with the fluke, and the groove is internally embedded with the pressing strip.

Furthermore, a sealing ring is sleeved on the periphery of the fluke, and the sealing ring is tightly abutted with the fluke hole.

Further, the batten is fixed with the anchor body through a screw.

Further, the outer end face of the fluke is provided with anchor teeth, and the axial included angle between the anchor teeth and the fluke is 50-70 degrees.

Further, the included angle between the anchor teeth and the axial direction of the fluke is 60 degrees.

Further, two groups of springs are arranged between each fluke and each pressing strip, and the two groups of springs are distributed in parallel.

Still further, the spring is a rectangular spring.

Further, a clamping groove for inserting the spring is concavely formed in the end face, opposite to the pressing strip, of the anchor fluke.

Further, the upper portion of the anchor body is provided with internal threads, and the lower portion of the anchor body is provided with external threads.

Compared with the prior art, the embodiment of the utility model has at least the following effects:

1. the sand prevention pipe is arranged in the anchor body and consists of the pipe body I and the pipe body II, the pipe body I is directly inserted into the anchor body, the pipe body II is in threaded connection with the anchor body, and the gap between the upper position and the lower position of the pipe body I in the anchor body can be adjusted through the pipe body II according to different underground environments, so that the gap is far smaller than the slit gap, the sand prevention is more effective, the processing difficulty is low, and the cost is reduced.

2. According to the utility model, the sealing ring is sleeved on the periphery of the fluke, and the sealing ring is tightly abutted with the fluke hole, so that fine sand can be prevented from entering the fluke hole.

3. According to the utility model, the axial included angle between the anchor teeth and the fluke is set to be 50-70 degrees, preferably 60 degrees, so that the hydraulic anchor can firmly grasp the sleeve, bearing pressure is higher and more firm when the hydraulic anchor acts underground, the requirement of deep well fracturing can be met, and the construction failure caused by bending or shifting of a pipe column and failure of the packer due to higher pressure at the lower part of the packer is avoided.

4. According to the utility model, two groups of springs are arranged between each fluke and each layering, and the springs are rectangular springs, so that the recovery of the flukes is facilitated, and the problem that the hydraulic anchor is blocked with the sleeve, and the oil well overhaul is caused by the fact that a construction pipe column cannot be lifted is avoided.

Drawings

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

FIG. 1 is a schematic diagram of a sand control hydraulic anchor according to an embodiment of the present utility model;

fig. 2 is a schematic view of the structure of the anchor claw according to the embodiment of the present utility model.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments of the present utility model. 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 "center," "top," "bottom," "left," "right," "vertical," "horizontal," "inner," "outer," "front," "rear," and the like indicate an azimuth or a positional relationship based on that shown in the drawings of the specification, and are merely for convenience of description and to simplify the description, but do not indicate or imply that the apparatus or elements to be referred to must have a specific azimuth, be configured and operated in a specific azimuth, and thus should not be construed as limiting the present utility model.

In order to solve the general defect of the sand prevention effect of the existing hydraulic anchor, the embodiment of the utility model provides a sand prevention hydraulic anchor, which comprises an anchor body 1, flukes 2, a pressing strip 3, a spring 4 and a sand prevention pipe 5 as shown in figure 1.

In this embodiment, the anchor body 1 is a cylindrical hollow tube body, and two ends are in a necking shape; the upper part of the anchor body 1 is provided with internal threads, and the lower part is provided with external threads so as to be connected with other parts.

In this embodiment, the fluke 2 is embedded in the anchor body 1, and in order to install the fluke 2, in this embodiment, a plurality of fluke holes 101 are formed in the periphery of the anchor body 1, and the plurality of fluke holes 101 are uniformly distributed in an array.

Taking fig. 1 as an example, 12 fluke holes 101 are formed in the outer periphery of the anchor body 1 in the present embodiment, and the 12 fluke holes 101 are divided into four groups uniformly distributed around the outer periphery of the anchor body 1, each group includes three fluke holes 101 distributed along the axial direction, but the number of the fluke holes 101 is not limited thereto.

Specifically, each fluke hole 101 extends along the radial direction, each fluke hole 101 is communicated with the inner cavity of the anchor body 1, and each fluke hole 101 is internally provided with a fluke 2.

As shown in fig. 1 and 2, in this embodiment, the outer end face of the fluke 2 is provided with the anchor tooth 201, as shown in fig. 2, the axial included angle between the anchor tooth 201 and the fluke 2 is 60 °, so that the hydraulic anchor can firmly grasp the casing, bearing pressure is higher and more firm when the hydraulic anchor acts underground, the requirement of deep well fracturing can be met, and the problem that the pipe column bends or moves due to higher pressure at the lower part of the packer, and the construction failure caused by the failure of the packer is avoided.

In order to prevent fine sand from entering the fluke hole 101, as shown in fig. 1, the outer periphery of the fluke 2 is further sleeved with a sealing ring 6, the sealing ring 6 can be specifically embedded on the outer wall of the fluke 2, and the sealing ring 6 is tightly abutted with the fluke hole 101.

In this embodiment, the batten 3 is also embedded in the anchor body 1, as shown in fig. 1, in this embodiment, a groove 102 is formed on the outer periphery of the anchor body 1 along the axial direction, and the groove 102 spans three fluke holes 101 distributed along the axial direction.

Specifically, the batten 3 of the present embodiment is fixed to the anchor body 1 by the screw 7, and specifically, the screw 7 is disposed between two adjacent fluke holes 101 and at both ends of the batten 3.

In order to correspond to the above arrangement of the fluke holes 101, four groups of grooves 102 are provided in this embodiment, and four groups of corresponding pressing strips 3 are provided, and the specific number of the four groups of grooves can be adjusted according to the arrangement of the fluke holes 101.

In this embodiment, as shown in fig. 1, the springs 4 are disposed between the fluke 2 and the batten 3, specifically, in this embodiment, two sets of springs 4 are disposed between the fluke 2 and the batten 3, and the two sets of springs 4 are distributed in parallel, and the springs 4 are rectangular springs, so that the recovery of the fluke 2 is facilitated, and thus, the problem that the hydraulic anchor and the casing are blocked, and the oil well overhaul is not caused by the lifting of the construction pipe column is avoided.

In order to install the spring 4, in this embodiment, a clamping groove 202 is concavely formed on an end surface of the fluke 2 opposite to the pressing bar 3, one end of the spring 4 can be inserted into the clamping groove 202, and the other end is abutted against the pressing bar 3, so that the spring 4 is prevented from being biased.

In this embodiment, the sand control pipe 5 is disposed in the anchor body 1, as shown in fig. 1, the sand control pipe 5 is composed of a pipe body I and a pipe body II, the pipe body I is located above the pipe body II, the pipe body I is directly inserted into the anchor body 1, the pipe body II is in threaded connection with the anchor body 1, and the up-down gap of the pipe body I in the anchor body can be adjusted through the pipe body II according to different downhole environments, so that the gap is far smaller than the slit gap, the sand control is more effective, the processing difficulty is low, and the cost is reduced.

The sand control hydraulic anchor of this embodiment can fix the tubular column in the pit when being used for fracturing to guarantee that the construction normally goes on, its concrete theory of operation is: after the oil pipe is pressurized, the anchor body 1 starts to compress the spring 4 to push outwards along with the rising of the pressure until the anchor teeth 201 of the fluke 2 are contacted with the casing wall, and the higher the pressure is, the tighter the pressure is embedded, so that the down-hole pipe column can be prevented from moving up and down in the well; when the pressure is relieved, the spring 4 drives the fluke 2 to recover, so that the anchor teeth 201 are separated from the inner wall of the sleeve, and the original position is recovered.

It should be noted that modifications and improvements can be made by those skilled in the art without departing from the inventive concept, and these are all within the scope of the present utility model.

Claims

1. The sand control hydraulic anchor comprises an anchor body, a plurality of flukes embedded on the anchor body, a pressing strip embedded on the anchor body and a spring arranged between the pressing strip and the flukes, and is characterized by further comprising:

the sand control pipe consists of a pipe body I and a pipe body II, wherein the pipe body I is inserted into the anchor body, and the pipe body II is in threaded connection with the anchor body; the outer end face of the fluke is provided with anchor teeth, and the axial included angle between the anchor teeth and the fluke is 50-70 degrees; the spring is a rectangular spring.

2. The sand control hydraulic anchor according to claim 1, wherein a plurality of fluke holes are formed in the periphery of the anchor body, extend in the radial direction and penetrate through the inner cavity of the anchor body;

3. The sand control hydraulic anchor of claim 2 wherein the fluke is peripherally sleeved with a sealing ring, the sealing ring being in tight abutment with the fluke bore.

4. The sand control hydraulic anchor of claim 2 wherein the bead is secured to the anchor body by a screw.

5. The sand control hydraulic anchor of claim 1 wherein the anchor teeth are axially angled at 60 ° relative to the fluke.

6. The sand control hydraulic anchor of claim 1 wherein two sets of springs are disposed between each fluke and the bead, the two sets of springs being disposed in parallel.

7. The sand control hydraulic anchor of claim 6, wherein the end surface of the fluke opposite the bead is recessed with a slot into which the spring is inserted.

8. The sand control hydraulic anchor of claim 1 wherein the upper portion of the anchor body is internally threaded and the lower portion of the anchor body is externally threaded.