Fiber filtering device for fiber fracturing process

Abstract

The utility model discloses a fiber filtering device for fiber fracturing process, which comprises a female head, a ball head, a three-jaw, a sealing ring and a filtering component, the sealing ring is arranged at one end of the female head opposite to the ball head and is used for sealing the end of the female head opposite to the ball head, and the filtering component is used for filtering fibers. The filtering assembly comprises a filtering cylinder and a cylinder edge, the filtering cylinder is arranged in the ball head, and the cylinder edge is arranged between the female head and the ball head; by means of the design of the female head, the ball head, the three jaws and the filtering assembly, the device can be movably connected through threads formed in the outer wall of the female head and the inner wall of the ball head, the device can be flexibly connected with an on-site liquid drainage pipeline, the device is installed between a wellhead Christmas tree and an oil nozzle, fibers can be effectively filtered through the arrangement of the filtering cylinder, and the filtering effect is good. And fibers are prevented from flowing back to block the oil nozzle, so that the liquid drainage after pressing is smoother, and the purpose of continuous and stable production is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of production backflow of fiber fracturing technology, and particularly relates to a fiber filtering device for fiber fracturing technology. Background Art

[0002] In view of loose sandstone reservoirs and medium - shallow heavy oil reservoirs, formation sand production is likely to occur after fracturing transformation, which affects the normal post - fracturing production. At the same time, it brings potential safety hazards to the safe production of oil and gas wells. The fiber sand control fracturing technology can effectively prevent formation sand production after fracturing to ensure normal production. However, since a small amount of fibers will remain in the wellbore, or when the formation fractures are not closed during the initial stage of backflow, the fibers will flow back with the backflow fluid and block the choke nozzle, affecting the normal continuous post - fracturing production. At the same time, frequent blockage of the choke nozzle will cause frequent opening and closing of the well, which will cause bottom - hole pressure fluctuations, resulting in formation sand production and sand control failure. Therefore, preventing fiber blockage of the choke nozzle is an urgent problem to be solved in fiber fracturing production. Content of the Utility Model

[0003] The purpose of the utility model is to provide a fiber filtering device for fiber fracturing technology to solve the problems raised in the above - mentioned background art.

[0004] To achieve the above purpose, the utility model provides the following technical solution: A fiber filtering device for fiber fracturing technology, comprising:

[0005] A female head, which is used to connect with the Christmas tree;

[0006] A ball head, which is used to connect with the choke nozzle;

[0007] A three - jaw, which is used for the connection between the female head and the three - jaw;

[0008] A sealing ring, which is arranged at the opposite ends of the female head and the ball head, and is used for sealing the opposite ends of the female head and the ball head;

[0009] A filtering component, which is used for filtering fibers. The filtering component includes a filtering cylinder and a cylinder edge. The filtering cylinder is arranged inside the ball head, and the cylinder edge is arranged between the female head and the ball head.

[0010] Preferably, a first circular through - groove is opened on the front surface of the three - jaw. One end of the inner wall of the first circular through - groove is provided with a first internal thread, and the other end of the inner wall of the first circular through - groove is fixedly connected with a flange.

[0011] Preferably, a protruding block for clamping with the flange is opened at one end of the ball head, and a second internal thread is opened on the inner wall at the other end of the ball head.

[0012] Preferably, one end of the outer wall of the female head is provided with a first external thread, the other end of the outer wall of the female head is provided with a second external thread, and a retaining ring for restricting the movement of the filter assembly is fixedly connected inside the female head.

[0013] Preferably, the filter cylinder is sleeved inside the ball head, and one end of the filter cylinder is fixedly connected to one side of the cylinder edge.

[0014] Preferably, the other end and the outer wall of the filter cylinder are respectively provided with filter holes for filtering fibers.

[0015] Preferably, the aperture of the filter hole is 2-10 mm.

[0016] Preferably, the sealing ring is in the shape of O, V or U.

[0017] The technical effects and advantages of the present utility model:

[0018] With the design of the female head, ball head, three claws and filter assembly, the present utility model can achieve a flexible connection through the threads provided on the outer wall of the female head and the inner wall of the ball head, and can be flexibly connected to the on-site drainage pipeline. Installed between the wellhead Christmas tree and the choke, through the arrangement of the filter cylinder, fibers can be effectively filtered to prevent fiber backflow from blocking the choke, making the post-fracture production drainage smoother, and thus achieving the purpose of continuous and stable production. Description of the Drawings

[0019] Figure 1 It is a front view structural schematic diagram of the present utility model.

[0020] Figure 2 It is a side view sectional structural schematic diagram of the present utility model.

[0021] Figure 3 It is a rear view structural schematic diagram of the filter assembly of the present utility model.

[0022] Figure 4 It is a side view sectional structural schematic diagram of the filter assembly of the present utility model.

[0023] In the figure: 1, female head; 2, ball head; 3, three claws; 4, sealing ring; 5, filter assembly; 51, filter cylinder; 52, cylinder edge; 53, filter hole; 6, retaining ring. Detailed Embodiments

[0024] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0025] The present utility model provides a fiber filtration device for a fiber fracturing process as shown in Figures 1-4 and includes:

[0026] A female head 1, which is used to connect with a Christmas tree;

[0027] A ball head 2, which is used to connect with a choke;

[0028] A three-jaw 3, which is used for the connection between the female head 1 and the three-jaw 3;

[0029] A sealing ring 4, which is arranged at one end of the female head 1 opposite to the ball head 2, and the sealing ring 4 is used for sealing the opposite ends of the female head 1 and the ball head 2;

[0030] A filtering component 5, which is used to filter fibers. The filtering component 5 includes a filtering cylinder 51 and a cylinder edge 52. The filtering cylinder 51 is arranged inside the ball head 2, and the cylinder edge 52 is arranged between the female head 1 and the ball head 2.

[0031] Specifically, a first circular through groove is formed on the front surface of the three-jaw 3. One end of the inner wall of the first circular through groove is provided with a first internal thread, and the other end of the inner wall of the first circular through groove is fixedly connected with a flange. A protruding block for clamping with the flange is formed at one end of the ball head 2. A second internal thread is formed on the inner wall of the other end of the ball head 2. A first external thread is formed on the outer wall of one end of the female head 1, and a second external thread is formed on the outer wall of the other end of the female head 1. A retaining ring 6 for restricting the movement of the filtering component 5 is fixedly connected inside the female head 1. The sealing ring 4 is in an O shape, a V shape or a U shape.

[0032] Furthermore, the three-jaw 3 is composed of a cylinder and three convex blocks. The three convex blocks are welded and fixed to the outer wall of the cylinder. The three convex blocks are evenly spaced around the outer wall of the cylinder near one end of the ball head 2. The first internal thread is provided at one end of the first circular through groove near the female head 1. The flange is provided at one end of the first circular through groove near the ball head 2. The flange is annular. The protruding block is an annular block. The side of the protruding block facing the female head 1 is provided as an inclined surface. The end of the female head 1 facing the protruding block is provided as an inclined surface. The sealing ring 4 is arranged between the two inclined surfaces. The second internal thread on the inner wall of the three-jaw 3 is used for threaded connection with the nozzle. The first external thread on the outer wall of the female head 1 is used for threaded connection with the Christmas tree. The second external thread at the other end of the female head 1 is used for meshing with the first internal thread of the three-jaw 3. The retaining ring 6 is a circular ring. The outer wall of the retaining ring 6 is welded and fixed to the inner wall of the female head 1. The diameter of the middle circle of the retaining ring 6 corresponds to the diameter of the inner wall of the ball head 2. When installing this device, first, the ball head 2 is sleeved on the inner wall of the flange. The sealing ring 4 is placed on the inclined surface of the protruding block of the ball head 2. At the same time, the filter cartridge 51 is inserted into the ball head 2, so that the cylinder edge 52 is attached to the end face of the ball head 2 facing the female head 1. Then, the female head 1 is inserted into the inner wall of the first circular through groove of the three-jaw 3, and the female head 1 is rotated. Under the action of the first internal thread and the second external thread, the inclined surfaces of the female head 1 and the ball head 2 approach and fit with each other, squeezing the sealing ring 4, so that the sealing ring 4 seals the contact part between the female head 1 and the ball head 2. At the same time, under the action of the retaining ring 6 and the protruding block, the cylinder edge 52 is clamped and fixed.

[0033] Specifically, the filter cartridge 51 is sleeved inside the ball head 2. One end of the filter cartridge 51 is fixedly connected to one side of the cylinder edge 52. The other end and the outer wall of the filter cartridge 51 are respectively provided with filter holes 53 for filtering fibers. The aperture of the filter holes 53 is 2 - 10 mm.

[0034] Furthermore, the part of the filter cartridge 51 in contact with the cylinder edge 52 is fixed by welding. The outer wall and the end away from the cylinder edge 52 of the filter cartridge 51 are both provided with filter holes 53, which can effectively filter fibers, prevent fiber backflow from clogging the nozzle, make the post-press production drainage more smooth, and thus achieve the purpose of continuous and stable production.

[0035] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A fiber filtration device for a fiber fracturing process, characterized in that, Comprising: A female connector (1) for connecting with a Christmas tree; A ball head (2) for connecting with a choke; A three-jaw (3) for connecting the female connector (1) and the three-jaw (3); A sealing ring (4) arranged at the opposite ends of the female connector (1) and the ball head (2), and the sealing ring (4) is used for sealing the opposite ends of the female connector (1) and the ball head (2); A filter assembly (5) for filtering fibers, the filter assembly (5) includes a filter cylinder (51) and a cylinder edge (52), the filter cylinder (51) is arranged inside the ball head (2), and the cylinder edge (52) is arranged between the female connector (1) and the ball head (2).

2. The fiber filtration device for a fiber fracturing process according to claim 1, characterized in that, A first circular through groove is formed on the front surface of the three-jaw (3), a first internal thread is formed at one end of the inner wall of the first circular through groove, and a flange is fixedly connected to the other end of the inner wall of the first circular through groove.

3. The fiber filtration device for fiber fracturing process according to claim 2, wherein, A protruding block for clamping with the flange is formed at one end of the ball head (2), and a second internal thread is formed on the inner wall of the other end of the ball head (2).

4. The fiber filtration device for fiber fracturing process according to claim 1, characterized in that, A first external thread is formed at one end of the outer wall of the female connector (1), a second external thread is formed at the other end of the outer wall of the female connector (1), and a retaining ring (6) for restricting the movement of the filter assembly (5) is fixedly connected inside the female connector (1).

5. A fiber filtration device for a fiber fracturing process according to claim 1, characterized in that, The filter cylinder (51) is sleeved inside the ball head (2), and one end of the filter cylinder (51) is fixedly connected to one side of the cylinder edge (52).

6. The fiber filtration device for fiber fracturing process according to claim 1, characterized in that, Filter holes (53) for filtering fibers are formed at the other end and the outer wall of the filter cylinder (51).

7. The fiber filtration device for a fiber fracturing process according to claim 6, characterized in that, The aperture of the filter holes (53) is 2 - 10 mm.

8. A fiber filtration device for a fiber fracturing process according to claim 1, characterized in that, The sealing ring (4) is O-shaped, V-shaped or U-shaped.

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