High pressure sand control hydraulic anchor for fracturing

Abstract

The utility model discloses a high pressure sand prevention hydraulic anchor for fracturing relates to hydraulic anchor technical field, the utility model discloses, including the anchor body, the surface of anchor body is opened with several groups of ladder hole, and the surface of anchor body and the opposite place of ladder hole is equipped with the mounting groove, the anchor claw is movably inserted in the ladder hole, the utility model discloses, through the sand prevention filter assembly of the slot in this anchor claw surface setting, can block the sand particle and enter the clearance between anchor claw and ladder hole, and then avoid the anchor claw to appear the jamming phenomenon when moving in the ladder hole, the anchor plate of mounting groove through screw fixed, anchor claw and anchor plate are movably inserted, and the spring between both can provide elastic force, so that when anchor claw can be withdrawn when no pressure or pressure reduces, realizes the anchor, and the rubber washer can enhance the sealing between anchor claw and ladder hole, guarantee the stability and reliability of anchoring, make the hydraulic anchor can effectively anchor the pipe column under the high pressure fracturing environment, prevent its displacement.

Description

Technical Field

[0001] This utility model relates to the field of hydraulic anchor technology, specifically to a high-pressure sand-control hydraulic anchor for fracturing. Background Technology

[0002] During the fracturing process of oil and gas wells, it is usually necessary to run the fracturing tubing into the well. In order to ensure that the tubing does not shift during the construction process, hydraulic anchors are widely used as a key downhole anchoring tool.

[0003] Under high-pressure fracturing conditions, existing hydraulic anchors may experience sand particles entering the inner cavity of the anchor claws in some sand-producing wells, causing the anchor claws to become stuck and preventing normal release, which brings many inconveniences to subsequent operations. In addition, the anchoring stability of existing hydraulic anchors under high pressure needs to be improved, and the tubing string may experience slight movement, thus affecting the precise control of the fracturing process.

[0004] Therefore, a high-pressure sand-control hydraulic anchor for fracturing is proposed. Utility Model Content

[0005] The purpose of this utility model is to provide a high-pressure sand-proof hydraulic anchor for fracturing in order to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model specifically adopts the following technical solution:

[0007] A high-pressure sand-control hydraulic anchor for fracturing includes an anchor body with several sets of stepped holes on its surface. An installation groove is formed on the surface of the anchor body opposite to the stepped holes. An anchor claw is movably inserted into each stepped hole. Rubber gaskets are fitted inside the stepped holes and on the surface of the anchor claws. A sand-control filter assembly is installed in the groove on the surface of the anchor claw, and the sand-control filter assembly is tightly fitted to the surface of the stepped holes to block sand particles from entering between the anchor claw and the stepped holes. An anchor plate is fixedly installed in the installation groove by screws, and the anchor claw is movably inserted into the anchor plate. A spring is provided between the anchor claw and the anchor plate.

[0008] Furthermore, the surface of the anchor claw is provided with an annular groove, and an O-ring is fitted inside the annular groove. The O-ring is made of high-strength corrosion-resistant rubber material.

[0009] Furthermore, the surface of the anchor body is provided with a protective component, wherein the protective component includes several sets of protrusions fixedly installed on the surface of the anchor body, a protective plate body is sleeved on the surface of the anchor body, and several sets of protrusions are located inside the protective plate body, and bolts are threaded into the protective plate body and the protrusions.

[0010] Furthermore, the sand filter assembly includes a limiting groove opened in the groove on the surface of the anchor claw, and the limiting groove is provided with an internal threaded hole. The limiting groove in the groove on the surface of the anchor claw and the surface of the anchor claw are provided with a sand filter screen, and a threaded pin is inserted into the sand filter screen and the internal threaded hole.

[0011] Furthermore, the groove on the surface of the anchor claw is provided with a groove, and the surface of the anchor plate is provided with a convex shaft, and the convex shaft and the groove correspond to each other, and the end of the spring is located in the groove, while the convex shaft is located in the spring.

[0012] Furthermore, one side wall of both the anchor claw and the anchor plate is arranged in an arc shape, and the arc surface of the anchor claw is provided with a patterned groove to increase the friction between the anchor claw and the pipe wall.

[0013] The beneficial effects of this utility model are as follows:

[0014] By installing a sand-proof filter component in the groove on the surface of the anchor claw, sand particles can be prevented from entering the gap between the anchor claw and the stepped hole, thus avoiding jamming when the anchor claw moves in the stepped hole. The anchor plate is fixed in the installation groove with screws, and the anchor claw and the anchor plate are movably inserted. The spring between the two can provide elastic force, so that the anchor claw can retract when there is no pressure or the pressure decreases, thus realizing the release of the anchor. The rubber gasket can enhance the sealing between the anchor claw and the stepped hole, ensuring the stability and reliability of the anchoring. This allows the hydraulic anchor to effectively anchor the pipe string and prevent its displacement under high pressure fracturing environment. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0016] Figure 2 This is a cross-sectional view of the present invention;

[0017] Figure 3 This is a utility model Figure 2 Enlarged view of part A;

[0018] Figure 4 This is a schematic diagram of the anchor claw of this utility model;

[0019] Figure 5 This is an exploded view of the anchor claw and sand-proof filter assembly of this utility model;

[0020] Reference numerals: 1. Anchor body; 11. Mounting groove; 2. Protective component; 201. Protrusion; 202. Protective plate body; 203. Bolt; 3. Stepped hole; 4. Anchor claw; 41. Groove; 5. O-ring seal; 6. Rubber gasket; 7. Sand filter component; 701. Limiting groove; 702. Sand filter screen; 703. Threaded pin; 8. Anchor plate; 81. Protruding shaft; 9. Spring. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0022] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0023] It should be noted that similar reference numerals and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures. Furthermore, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0024] In the description of the embodiments of this utility model, it should be noted that the terms "inner", "outer", "upper", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the utility model product is usually placed when in use. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0025] like Figures 1 to 5 As shown, a high-pressure sand-control hydraulic anchor for fracturing includes an anchor body 1. The surface of the anchor body 1 has several sets of stepped holes 3, and an installation groove 11 is formed on the surface of the anchor body 1 opposite to the stepped holes 3. Anchor claws 4 are movably inserted into the stepped holes 3. Figure 3 , Figure 4 and Figure 5 As shown, in some practical applications, the surface of the anchor claw 4 is provided with an annular groove, and an O-ring seal 5 is fitted inside the annular groove. The O-ring seal 5 is made of high-strength corrosion-resistant rubber material.

[0026] More specifically, the O-ring 5 can seal the space between the anchor claw 4 and the stepped hole 3, improving the stability of the anchoring. The rubber material of the O-ring 5 has elasticity and corrosion resistance, which improves its service life.

[0027] A rubber gasket 6 is fitted inside the stepped hole 3 and on the surface of the anchor claw 4. A sand-proof filter assembly 7 is installed in the groove on the surface of the anchor claw 4, and the sand-proof filter assembly 7 is tightly fitted to the surface of the stepped hole 3 to block sand particles from entering between the anchor claw 4 and the stepped hole 3; Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, specifically, the sand filter assembly 7 includes a limiting groove 701 opened in the groove on the surface of the anchor claw 4, and the limiting groove 701 is provided with an internal threaded hole. The limiting groove 701 in the groove on the surface of the anchor claw 4 and the surface of the anchor claw 4 are provided with a sand filter screen 702, and a threaded pin 703 is inserted into the sand filter screen 702 and the internal threaded hole.

[0028] More specifically, the limiting groove 701 is opened in the groove on the surface of the anchor claw 4, and the internal threaded hole on it cooperates with the threaded pin 703 to fix and install the sand filter 702. When the stepped hole 3 is opened, the sand filter 702 can effectively block sand particles from entering between the anchor claw 4 and the stepped hole 3, avoid the sand particles from interfering with the relative movement between the anchor claw 4 and the anchor body 1, prevent the anchor claw 4 from getting stuck, ensure that the hydraulic anchor can be released normally, and ensure the smooth progress of the fracturing operation.

[0029] An anchor plate 8 is fixedly installed in the mounting groove 11 by screws, and the anchor claw 4 is movably inserted into the anchor plate 8. A spring 9 is provided between the anchor claw 4 and the anchor plate 8.

[0030] like Figure 2 and Figure 3 As shown, in some practical applications, a groove 41 is provided in the slot on the surface of the anchor claw 4, and a convex shaft 81 is provided on the surface of the anchor plate 8, with the convex shaft 81 corresponding to the groove 41, and the end of the spring 9 located in the groove 41, while the convex shaft 81 is located in the spring 9.

[0031] More specifically, the groove 41 on the surface of the anchor claw 4 and the convex shaft 81 on the surface of the anchor plate 8 limit the spring 9 between the anchor claw 4 and the anchor plate 8, thereby achieving stable installation of the spring 9. At the same time, the elasticity of the spring 9 allows the anchor claw 4 to automatically retract after losing pressure, thus achieving anchor release.

[0032] like Figure 3 , Figure 4 and Figure 5 As shown, in some practical applications, both the anchor claw 4 and the anchor plate 8 have an arc-shaped sidewall, and the arc-shaped surface of the anchor claw 4 is provided with a groove to increase the friction between the anchor claw 4 and the pipe wall.

[0033] More specifically, the grooved surface of the anchor claw 4 increases the friction between the anchor claw 4 and the casing wall, preventing the anchor claw 4 from slipping during anchoring. This better resists the surging force that may be generated during high-pressure fracturing of the tubing, ensuring the stability of the tubing position and guaranteeing precise control of fracturing operations.

[0034] like Figure 1 and Figure 2 As shown, in some practical applications, the surface of the anchor body 1 is provided with a protective component 2, wherein the protective component 2 includes several sets of protrusions 201 fixedly installed on the surface of the anchor body 1, the surface of the anchor body 1 is covered with a protective plate body 202, and the several sets of protrusions 201 are located inside the protective plate body 202. Bolts 203 are threaded into the protective plate body 202 and the protrusions 201.

[0035] More specifically, the protective structure composed of the guard plate body 202 and the protrusion 201 can also shield and protect a part of the anchor body 1, further reducing the wear and erosion of the anchor body 1 surface by foreign objects such as sand particles, and ensuring that the anchor body 1 can maintain good performance after long-term use.

[0036] In summary: The pressure within the anchor body 1 causes the anchor claw 4 and the sand filter assembly 7 to move within the stepped hole 3, thereby compressing the spring 9 and allowing the anchor claw 4 to extend and anchor the pipe column. The sand filter assembly 7, installed in the groove on the surface of the anchor claw 4, prevents sand particles from entering the gap between the anchor claw 4 and the stepped hole 3, thus avoiding jamming when the anchor claw 4 moves within the stepped hole 3. The anchor plate 8, fixed in the mounting groove 11 by screws, allows the anchor claw 4 to be movably inserted into the anchor plate 8. The spring 9 between the two provides elastic force, allowing the anchor claw 4 to retract when there is no pressure or the pressure decreases, thus releasing the anchor. The rubber gasket 6 enhances the sealing between the anchor claw 4 and the stepped hole 3, ensuring the stability and reliability of the anchoring. This enables the hydraulic anchor to effectively anchor the pipe column and prevent displacement under high-pressure fracturing conditions.

[0037] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A high-pressure sand-control hydraulic anchor for fracturing, characterized in that, The device includes an anchor body (1), the surface of which is provided with a number of stepped holes (3), and an installation groove (11) is provided on the surface of the anchor body (1) and opposite to the stepped holes (3). An anchor claw (4) is movably inserted into the stepped holes (3). A rubber gasket (6) is fitted inside the stepped holes (3) and on the surface of the anchor claw (4). A sand filter assembly (7) is provided in the groove on the surface of the anchor claw (4), and the sand filter assembly (7) is tightly fitted to the surface of the stepped holes (3) to block sand particles from entering between the anchor claw (4) and the stepped holes (3). An anchor plate (8) is fixedly installed in the installation groove (11) by screws, and the anchor claw (4) is movably inserted into the anchor plate (8). A spring (9) is provided between the anchor claw (4) and the anchor plate (8).

2. The high-pressure sand-control hydraulic anchor for fracturing according to claim 1, characterized in that, The surface of the anchor claw (4) is provided with an annular groove, and an O-ring (5) is fitted inside the annular groove. The O-ring (5) is made of high-strength corrosion-resistant rubber material.

3. The high-pressure sand-control hydraulic anchor for fracturing according to claim 1, characterized in that, The surface of the anchor body (1) is provided with a protective component (2), wherein the protective component (2) includes a number of protrusions (201) fixedly installed on the surface of the anchor body (1), the surface of the anchor body (1) is covered with a protective plate body (202), and the number of protrusions (201) are located inside the protective plate body (202), and bolts (203) are threaded into the protective plate body (202) and the protrusions (201).

4. The high-pressure sand-control hydraulic anchor for fracturing according to claim 1, characterized in that, The sand filter assembly (7) includes a limiting groove (701) opened in the groove on the surface of the anchor claw (4), and the limiting groove (701) is provided with an internal thread hole. The limiting groove (701) in the groove on the surface of the anchor claw (4) and the surface of the anchor claw (4) are provided with a sand filter screen (702), and a threaded pin (703) is inserted into the sand filter screen (702) and the internal thread hole.

5. A high-pressure sand-control hydraulic anchor for fracturing according to claim 1, characterized in that, The anchor claw (4) has a groove (41) in the slot on its surface, and the anchor plate (8) has a convex shaft (81) on its surface. The convex shaft (81) and the groove (41) are corresponding to each other, and the end of the spring (9) is located in the groove (41), while the convex shaft (81) is located in the spring (9).

6. A high-pressure sand-control hydraulic anchor for fracturing according to claim 1, characterized in that, The anchor claw (4) and the anchor plate (8) are both provided with an arc-shaped structure on one side wall, and the arc-shaped surface of the anchor claw (4) is provided with a patterned groove to increase the friction between the anchor claw (4) and the pipe wall.

Images