A feathered borehole support device

Abstract

This invention provides a feather-shaped drilling support device, relating to the field of feather-shaped drilling technology. It addresses the problem that during the drilling of branch holes, the fracturing and loosening of rock strata can cause collapse at the branch hole location, affecting the accuracy of the branch hole drilling. The device comprises a main borehole on one side and branch holes on both sides. A support frame is connected to the inner wall of the main borehole, with a limiting ring at one end and a support component in the middle. The support component separates from the midpoint. This separation via the support component allows for the fitting and support of the inner wall of boreholes of different diameters, thereby making the rock strata inside the borehole more stable and reinforced under pressure, preventing collapse during the drilling of branch holes.

Description

Technical Field

[0001] This invention relates to the field of feather drilling technology, and more specifically, to a feather drilling support device. Background Technology

[0002] Feather drilling refers to drilling that begins during gas pre-extraction. By opening the main borehole and branch boreholes, a more comprehensive pre-extraction of a geological area can be carried out.

[0003] However, existing feather boreholes are drilled in one go, so when branch boreholes are drilled on the inner wall after the main borehole is opened, the vibration generated by drilling will cause the surrounding rock strata to break up and produce a large amount of gravel and sand. This will cause the rock strata at the location where the branch borehole is to be drilled on the inner wall of the main borehole to loosen and collapse, thus affecting the accuracy of the branch borehole and increasing the possibility of gas leakage. Summary of the Invention

[0004] The purpose of this invention is to provide a feather drilling support device to solve the problem that when feather drilling is used to open branch holes, the rock strata may be broken, causing the geological strata at the branch hole opening location to loosen and collapse, which affects the accuracy of the branch hole.

[0005] The embodiments of the present invention are achieved through the following technical solutions:

[0006] The present invention provides a feather-shaped drilling support device, including a body, a main drill hole on one side of the body, branch drill holes on both sides of the main drill hole, a support frame connected to the inner wall of the main drill hole, a limiting ring at one end of the support frame, a support component in the middle of the support frame, and the support component being separated from the midpoint.

[0007] Preferably, the limiting ring is a circular ring with a diameter at one end of the support frame that is larger than the diameter of the main borehole.

[0008] Preferably, the limiting ring further includes anchor rods, which are disposed on both sides of the limiting ring and are composed of two semicircles combined together.

[0009] Preferably, the support assembly includes a support ring and support blocks, with the support ring located in the middle of the support frame and the support blocks located on both sides of the support ring.

[0010] Preferably, the support ring consists of several rings arranged in the middle of the support frame, and each support ring is composed of two semicircles combined together.

[0011] Preferably, the support block is located at the connection between the two semicircles of the support ring, and the support block is made of an elastic material.

[0012] Preferably, the support ring includes a connecting rod, a telescopic groove, a limiting groove, a fitting groove, and a sliding groove. The connecting rod is located on one side of the support ring, the telescopic groove is located on one side of the connecting rod, the limiting groove is located at the top of the connecting rod, the fitting groove is located at the connection point of the two rings of the support ring, and the sliding groove is located on both sides of the middle part of the fitting groove.

[0013] Preferably, several support rings are connected to each other by a telescopic groove in a connecting rod on one side.

[0014] Preferably, the support block includes a sliding shaft, which is disposed on both sides of both ends of the support block.

[0015] Preferably, the sliding shaft and the sliding groove are matched together.

[0016] The technical solutions of the embodiments of the present invention have at least the following advantages and beneficial effects:

[0017] 1. The device is designed to separate the support components, which are suitable for boreholes of different diameters to provide support for the inner wall of the borehole. This makes the rock strata inside the borehole more stable and reinforced under pressure. When branch boreholes are drilled, the rock strata will not easily break and generate a large amount of sand and gravel, causing collapse and burial. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0020] Figure 2 This is a side view schematic diagram of the connection structure between the support frame and the main borehole of the present invention;

[0021] Figure 3 This is a front view cross-sectional structural diagram of the support ring of the present invention;

[0022] Figure 4 For the present invention Figure 3 Enlarged structural diagram at point A;

[0023] Figure 5 This is a partial structural schematic diagram of the support frame of the present invention;

[0024] Figure 6 For the present invention Figure 5 Enlarged structural diagram at point B;

[0025] Icons: Body 1, Main Drill Hole 101, Branch Drill Hole 102, Support Frame 2, Limiting Ring 201, Anchor Rod 2011, Support Ring 202, Connecting Rod 2021, Expansion Groove 20211, Limiting Groove 20212, Fitting Groove 2022, Sliding Groove 2023, Support Block 203, Sliding Shaft 2031. Detailed Implementation

[0026] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0027] The following is combined Figures 1 to 6 The present invention will be described in detail below.

[0028] A feather-shaped drilling support device includes a body 1, a main drill hole 101 on one side of the body 1, branch drill holes 102 on both sides of the main drill hole 101, a support frame 2 connected to the inner wall of the main drill hole 101, a limiting ring 201 at one end of the support frame 2, a support component in the middle of the support frame 2, the support component being separated from the midpoint, the limiting ring 201 being a ring with a diameter at one end of the support frame 2 larger than the diameter of the main drill hole 101, the limiting ring 201 also including an anchor rod 2011, the anchor rod 2011 being disposed on both sides of the limiting ring 201, and the anchor rod 2011 being composed of two semicircles combined together.

[0029] First, a main borehole 101 is drilled on the main body using a drill bit. Then, a drill bit that can be bent and connected to drill branch boreholes 102 on both sides of the main borehole 101, forming a feather-shaped borehole to facilitate more comprehensive extraction of gas.

[0030] After the main borehole 101 is opened, the support frame 2 is placed inside it, and then the support components separate to abut against the inner wall of the main borehole 101, applying pressure to support the inner wall of the main borehole 101. Then, the connection to the opening of the main borehole 101 is limited by the limiting ring 201. At the same time, the limiting ring 201 will also separate with the support components and then be limited by the anchor rod 2011, thereby limiting the support frame 2 and limiting the separation of the support components.

[0031] Furthermore, the support assembly includes a support ring 202 and a support block 203. The support ring 202 is located in the middle of the support frame 2, and the support blocks 203 are located on both sides of the support ring 202. The support ring 202 consists of several rings located in the middle of the support frame 2, and each support ring 202 is composed of two semicircles combined together. The support block 203 is located at the connection between the two semicircles of the support ring 202, and the support block 203 is made of an elastic material. The support ring 202 includes a connecting rod 2021, a telescopic groove 20211, and a limiting element. The connecting rod 2021 is located on one side of the support ring 202. The telescopic groove 20211 is located on one side of the connecting rod 2021. The limiting groove 20212 is located on the top of the connecting rod 2021. The telescopic groove 2022 is located at the connection between the two rings of the support ring 202. The sliding groove 2023 is located on both sides of the middle part of the telescopic groove 2022. Several support rings 202 are connected to each other by the telescopic groove 20211 in the connecting rod 2021 on one side.

[0032] Before the support frame 2 is placed into the main borehole 101, several support rings 202 in the support frame 2 are connected to each other through the telescopic groove 20211 in the connecting rod 2021. The connecting rod 2021 also provides certain support to its inner wall and contracts by different distances according to the position of the branch borehole 102 to be started. Then, by inserting a limiting rod into the limiting groove 20212 and abutting against one side of the support ring 202, the spacing between each support ring 202 is limited, so that the branch borehole 102 can be opened from the spacing between each support ring 202.

[0033] Then, the assembled support frame 2 is placed into the main borehole 101. Then, a cylindrical object or other object adapted to the diameter of the main borehole 101 is inserted into the middle of the support frame 2 to open the support ring 202. This causes the support ring 202 to separate to both sides and abut against the inner wall of the main borehole 101, thereby supporting the inner wall of the main borehole 101 and preventing loosening and collapse around the drilled branch borehole 102.

[0034] Furthermore, the support block 203 includes a sliding shaft 2031, which is disposed on both sides of both ends of the support block 203, and the sliding shaft 2031 cooperates with the sliding groove 2023.

[0035] Simultaneously, when the support ring 202 separates, the connection on both sides will stretch the support block 203 to extend from the fitting groove 2022. The elasticity of the support block 203 itself allows it to generate a certain arched restoring force to abut against the inner wall of the main borehole 101, thereby abutting the part of the support ring 202 that was not abutted after separation. At the same time, it also maintains a certain connection and stability for the support ring 202 after separation. Finally, the displacement of the support block 203 is achieved by the sliding shafts 2031 on both ends moving along the sliding grooves 2023 on both sides of the middle of the fitting groove 2022, making its movement and extension more stable.

[0036] The following is a specific implementation process of the present invention. First, a main borehole 101 is drilled on the main body using a drill bit. Then, a drill bit capable of bending and connecting to the main borehole 101 drills branch boreholes 102 on both sides, forming a feather-shaped borehole to facilitate more comprehensive gas extraction. Before the support frame 2 is placed into the main borehole 101, several support rings 202 in the support frame 2 are connected to each other through the telescopic groove 20211 in the connecting rod 2021. The rod contracts by different distances depending on the position of the branch boreholes 102. Then, a limiting rod is inserted into the limiting groove 20212 and abuts against one side of the support ring 202 to limit the spacing between each support ring 202, thus allowing the branch boreholes 102 to be opened from the spacing between each support ring 202. Finally, the entire assembled support frame 2 is placed into the main borehole 101, and then the main borehole 101 is adjusted accordingly. A cylindrical object or other external object is inserted into the middle of the support frame 2 to open the support ring 202, causing the support ring 202 to separate to both sides and abut against the inner wall of the main drill hole 101. This provides support to the inner wall of the main drill hole 101, preventing loosening and collapse around the drilled branch holes 102. Simultaneously, when the support ring 202 separates, the connection on both sides stretches the support block 203 from the fitting groove 2022. The elasticity of the support block 203 itself allows it to generate a certain arched restoring force to abut against the inner wall of the main drill hole 101, thus abutting the part of the support ring 202 that was not abutted after separation. It also maintains a certain connection and stability for the support ring 202 after separation. Finally, the displacement of the support block 203 is achieved by the sliding shafts 2031 on both ends moving along the sliding grooves 2023 on both sides of the middle of the fitting groove 2022, making its movement and extension more stable.

[0037] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A feather-like borehole support device comprising a body (1) provided with a main borehole (101) on one side, and branch boreholes (102) provided on both sides of the main borehole (101), characterized in that, The inner wall of the main borehole (101) is connected to a support frame (2), one end of the support frame (2) is provided with a limiting ring (201), and a support component is provided in the middle of the support frame (2), and the support component is separated from the midpoint; The support assembly includes a support ring (202) and a support block (203). The support ring (202) is located in the middle of the support frame (2), and the support block (203) is located on both sides of the support ring (202). The support ring (202) consists of several circular rings arranged in the middle of the support frame (2), and each support ring (202) is composed of two semicircles combined together; The support block (203) is located at the connection of the two semicircles of the support ring (202), and the support block (203) is made of an elastic material; The support ring (202) includes a connecting rod (2021), a telescopic groove (20211), a limiting groove (20212), a fitting groove (2022), and a sliding groove (2023). The connecting rod (2021) is located on one side of the support ring (202), the telescopic groove (20211) is located on one side of the connecting rod (2021), the limiting groove (20212) is located at the top of the connecting rod (2021), the fitting groove (2022) is located at the connection between the two rings of the support ring (202), and the sliding groove (2023) is located on both sides of the middle part of the fitting groove (2022). Several support rings (202) are connected to each other by a telescopic groove (20211) in a connecting rod (2021) on one side; The support block (203) includes a sliding shaft (2031), which is disposed on both sides of both ends of the support block (203); The sliding shaft (2031) and the sliding groove (2023) cooperate with each other.

2. The feather-shaped drilling support device according to claim 1, characterized in that, The limiting ring (201) is a circular ring with a diameter at one end of the support frame (2) that is larger than the diameter of the main drill hole (101).

3. The feather-shaped drilling support device according to claim 1, characterized in that, The limiting ring (201) also includes an anchor rod (2011), which is disposed on both sides of the limiting ring (201) and is composed of two semicircles combined together.

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