Positioning device of downward crossing drilling anti-reflection extraction equipment

Abstract

The invention discloses a positioning device of downward crossing drilling anti-reflection extraction equipment, which comprises a sealing seat, a positioning device, a positioning device and a control device, and is characterized in that the sealing seat is hermetically mounted at a wellhead; the driving joint is fixedly mounted at the central position of the sealing seat and takes an external motor as a power source; the self-adjusting supporting mechanism is supported and fixed in the well through external expansion deformation, and the external expansion state of the self-adjusting supporting mechanism is driven and controlled by the driving joint; and the extraction pipe is fixedly mounted on the self-adjusting supporting mechanism and communicates with the inner cavity of the driving joint. The self-adjusting supporting mechanism is arranged in the device, the push-pull rod is controlled to move through the driving joint, the wall grabbing assembly is driven to stretch out and draw back in the radial direction, automatic attachment to the well wall is achieved, the mechanism can adapt to wellbores with different diameters or with local deformation, it is ensured that the extraction device is centered and stably installed, and deflection and looseness caused by drilling machine vibration or stratum displacement are reduced.

Description

Technical Field

[0001] This invention specifically relates to the field of coal mine gas extraction technology, and more specifically to a positioning device for a downward cross-layer drilling enhanced permeability extraction equipment. Background Technology

[0002] In safe coal mining and coalbed methane resource utilization, cross-strata drilling extraction is one of the core technologies for gas control, disaster prevention, and clean energy acquisition. Downward drilling (i.e., drilling direction inclined downwards or vertically downwards) is particularly widely used because it can effectively penetrate multiple coal seams or rock strata to achieve regional gas pre-extraction.

[0003] However, the construction and long-term stable operation of downhole drilling equipment face unique challenges: the wellbore is prone to non-uniform deformation or local shrinkage due to ground stress and mining activities, and the borehole trajectory has a certain degree of deviation, forming an irregular borehole wall environment; currently, the positioning and fixing of downhole extraction equipment often relies on methods such as mechanical slips, hydraulic supports, or grouting consolidation, which have the following drawbacks in practical applications:

[0004] 1. Most mechanical support devices have fixed dimensions or limited adjustment range, making it difficult to adapt to irregular well diameters or local deformations caused by varying geological conditions. This can easily lead to insufficient support or over-support that damages the well wall, resulting in equipment installation being eccentric or not securely fixed.

[0005] 2. Under dynamic disturbances such as continuous drilling vibration, coal seam gas pressure fluctuations, or slight stratum displacement, traditional rigid supports are prone to loosening, slippage, or even failure, causing the extraction tubing to deviate and the seal to fail, severely reducing the extraction concentration and efficiency. Summary of the Invention

[0006] Therefore, the present invention proposes a positioning device for a downward cross-layer drilling permeability enhancement extraction equipment to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a positioning device for a downward cross-layer drilling permeability enhancement extraction equipment, comprising:

[0008] The sealing seat is installed at the wellhead;

[0009] The drive section is fixedly installed at the center of the sealing seat and uses an external motor as its power source;

[0010] The self-adjusting support mechanism is fixed inside the well by an outward expansion deformation support, and the outward expansion state of the self-adjusting support mechanism is driven and controlled by the drive joint.

[0011] And the extraction pipe, which is fixedly installed on the self-adjusting support mechanism and connected to the inner cavity of the drive section.

[0012] Optionally, the self-adjusting support mechanism includes:

[0013] The support plate has a hollow structure.

[0014] The base plate is fixed to the bottom of the support plate;

[0015] An adjustment disc is rotatably mounted at the center of the base plate;

[0016] Multiple wall-gripping components are arranged in a ring around the edge of the bottom surface of the support plate;

[0017] And push-pull rods, which are the same number as the wall-gripping components, and are arranged in a circular array between the adjustment disk and the multiple wall-gripping components, and each of the push-pull rods is rotatably connected between the adjustment disk and the wall-gripping components.

[0018] Optionally, the wall-gripping assembly consists of a slide rail, a slide block, and a support claw. The slide rail is fixed to the base plate, and the slide block is slidably connected to the slide rail. The slide block and the support claw are elastically connected.

[0019] Optionally, a stress sensor is installed on the support claw, which can monitor the stress on the support portion of the support claw.

[0020] Optionally, the slide member includes:

[0021] The housing contains a closed cavity and an open cavity spaced apart from each other.

[0022] The slider is matched and slidably positioned within the closed cavity;

[0023] A sliding rod, one end of which is fixedly connected to a slider, and the other end of which is inserted into an opening and then fixedly connected to the support claw.

[0024] And a spring, which is disposed inside the opening and wrapped around the side wall of the slide rod, one end of the spring is fixed to the bottom of the opening, and the other end of the spring is fixed to the support claw.

[0025] Optionally, the oral cavity is slidably engaged with the supporting claw.

[0026] Optionally, the drive section includes:

[0027] The cylindrical shell is fixedly connected to the support plate;

[0028] There are two baffles, which are symmetrically fixed inside the shell, and a flow cavity is formed between the two baffles;

[0029] The inner shaft seat is fixed inside the cylindrical shell;

[0030] And the large drive tube, one end of which is driven and connected by an external motor, and the other end passes through the inner shaft seat and two partitions, and then is fixedly connected to the small drive tube.

[0031] Optionally, the small drive pipe and the extraction pipe are both connected to the central hole of the regulating disc.

[0032] Optionally, an air port is provided on the side wall of the large drive tube, and the air port is connected to the flow cavity;

[0033] The side opening of the cylinder shell is connected to a pipe. One end of the pipe is connected to the flow chamber, and the other end of the pipe passes through the seal and then connects to the external gas tank.

[0034] The present invention adopts the above technology and has the following beneficial effects compared with the existing technology: The device of the present invention is equipped with a self-adjusting support mechanism, which controls the movement of the push-pull rod through the drive joint, drives the wall grabbing assembly to extend and retract radially, and realizes automatic fitting with the well wall. This mechanism can adapt to wells of different diameters or with local deformation, ensuring that the extraction device is centered and installed stably, and reducing the deviation and loosening caused by drilling rig vibration or formation displacement. Attached Figure Description

[0035] Figure 1 A schematic diagram of the positioning device for a downward-through-layer permeability enhancement extraction equipment;

[0036] Figure 2 for Figure 1 Schematic diagram of the internal structure of the drive section;

[0037] Figure 3 for Figure 1 A three-dimensional structural diagram of the self-adjusting support mechanism;

[0038] Figure 4 for Figure 3 An enlarged schematic diagram of part A in the middle;

[0039] Figure 5 for Figure 4 A schematic diagram of the internal structure of the middle slide block.

[0040] In the diagram: 1. Sealing seat; 2. Drive section; 3. Pipeline; 4. Self-adjusting support mechanism; 5. Extraction pipe;

[0041] 201. Shell; 202. Flow chamber; 203. Baffle; 204. Inner shaft seat; 205. Air port; 206. Large drive pipe fitting; 207. Small drive pipe fitting;

[0042] 401. Support plate; 402. Push-pull rod; 403. Base plate; 404. Adjustment plate; 405. Slide rail; 406. Slide block; 407. Support claw; 408. Stress sensor;

[0043] 4061, housing; 4062, slide bar; 4063, spring; 4064, slider; 4065, closed cavity. Detailed Implementation

[0044] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0045] Example: Please refer to the appendix. Figure 1-5 The present invention provides a technical solution: a positioning device for a downward through-layer drilling permeability enhancement extraction equipment, comprising:

[0046] Sealing seat 1, its seal is installed at the wellhead;

[0047] The drive section 2 is fixedly installed at the center of the sealing seat 1 and uses an external motor as its power source;

[0048] The self-adjusting support mechanism 4 is fixed inside the well by an outward expansion deformation support, and the outward expansion state of the self-adjusting support mechanism 4 is driven and controlled by the drive section 2.

[0049] And the extraction pipe 5, which is fixedly installed on the self-adjusting support mechanism 4 and communicates with the inner cavity of the drive section 2.

[0050] It should be noted that the self-adjusting support mechanism controls the movement of the push-pull rod through the drive joint, which drives the wall-gripping assembly to extend and retract radially, thereby achieving automatic fit against the well wall. This mechanism can adapt to wellbores of different diameters or with local deformation, ensuring that the extraction device is centered and installed stably, reducing deviation and loosening caused by drilling rig vibration or formation displacement.

[0051] In this embodiment, the self-adjusting support mechanism 4 includes:

[0052] Support plate 401, which adopts a hollow structure;

[0053] The base plate 403 is fixed to the bottom of the support plate 401;

[0054] An adjusting disc 404 is rotatably mounted at the center of the base plate 403;

[0055] Multiple wall-gripping components are provided and are distributed in a ring around the edge of the bottom surface of the support plate 401;

[0056] And push-pull rods 402, which are the same number as the wall-gripping components, and are arranged in a circular array between the adjustment disk 404 and the multiple wall-gripping components, and each push-pull rod 402 can be rotatably connected between the adjustment disk 404 and the wall-gripping components.

[0057] In this embodiment, the wall-gripping assembly consists of a slide rail 405, a slide block 406, and a support claw 407. The slide rail 405 is fixed on the base plate 403, and the slide block 406 is slidably connected to the slide rail 405. The slide block 406 and the support claw 407 are elastically connected.

[0058] In this embodiment, a stress sensor 408 is installed on the support claw 407, and the stress sensor 408 can monitor the stress of the support portion of the support claw 407.

[0059] In this embodiment, the slide member 406 includes:

[0060] The housing 4061 has a closed cavity 4065 and an open cavity that are spaced apart from each other;

[0061] Slider 4064, whose matching sliding arrangement is located within closed cavity 4065;

[0062] The slide bar 4062 has one end fixedly connected to the slider 4064, and the other end of the slide bar 4062 is inserted into the opening and then fixedly connected to the support claw 407.

[0063] And spring 4063, which is disposed inside the opening and wrapped around the side wall of slide bar 4062. One end of spring 4063 is fixed to the bottom of the opening and the other end of spring 4063 is fixed to support claw 407.

[0064] It should be noted that the slide block is equipped with a combination of spring and slide rod. On the one hand, this provides elastic buffering when the support claw comes into contact with the well wall, thus avoiding rigid impact damage to the well wall structure.

[0065] On the other hand, the support claw integrates stress sensors, which can monitor the support force data and the local collapse of the well wall in real time. Through intelligent leveling and overload warning, it can prevent the device from becoming unstable due to insufficient support, and also avoid crushing the well wall due to excessive support force.

[0066] In this embodiment, the oral cavity and the support claw 407 are slidably connected.

[0067] In this embodiment, the drive section 2 includes:

[0068] The cylindrical shell 201 is fixedly connected to the support plate 401;

[0069] Two partitions 203 are provided and symmetrically fixed inside the shell 201, and a flow cavity 202 is formed between the two partitions 203;

[0070] The inner shaft seat 204 is fixed inside the cylindrical shell 201;

[0071] And the large drive tube 206, one end of which is driven and connected by an external motor, and the other end passes through the inner shaft seat 204 and two partitions 203, and is then fixedly connected to the small drive tube 207.

[0072] In this embodiment, both the small drive pipe 207 and the extraction pipe 5 are connected to the central hole of the regulating plate 404.

[0073] In this embodiment, an air port 205 is provided on the side wall of the large drive pipe 206, and the air port 205 is connected to the flow cavity 202.

[0074] The side opening of the shell 201 is connected to the drain pipe 3. One end of the drain pipe 3 is connected to the flow chamber 202, and the other end of the drain pipe 3 passes through the seal 1 and then connects to the external gas tank.

[0075] It should be noted that the drive section has an independent flow channel (flow chamber) inside, and the air port on the large drive pipe is connected to the flow chamber, so that the extraction pipe and the external gas tank form a continuous closed air path through the pipe. This structure realizes that power transmission and gas extraction are carried out simultaneously, without the need to lay additional pipelines, reducing the risk of leakage.

[0076] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A positioning device for a downward through-layer drilling permeability enhancement extraction equipment, characterized in that, It includes: Sealing seat (1), whose seal is installed at the wellhead; The drive section (2) is fixedly installed at the center of the sealing seat (1) and uses an external motor as its power source; The self-adjusting support mechanism (4) is fixed in the well by an outward expansion deformation support, and the outward expansion state of the self-adjusting support mechanism (4) is driven and controlled by the drive section (2); And the extraction pipe (5), which is fixedly installed on the self-adjusting support mechanism (4) and communicates with the inner cavity of the drive section (2).

2. The positioning device of the downward through-layer drilling permeability enhancement extraction equipment according to claim 1, characterized in that: The self-adjusting support mechanism (4) includes: The support plate (401) has a hollow structure; The base plate (403) is fixed to the bottom of the support plate (401); An adjustment disc (404) is rotatably mounted at the center of the base plate (403); Multiple wall-gripping components are provided and are distributed in a ring around the edge of the bottom surface of the support plate (401); And push-pull rods (402), which are the same number as the wall-gripping components and are arranged in a circular array between the adjustment disk (404) and the multiple wall-gripping components, and each of the push-pull rods (402) is rotatably connected between the adjustment disk (404) and the wall-gripping components.

3. The positioning device for a downward cross-layer drilling permeability enhancement extraction equipment according to claim 2, characterized in that: The wall-gripping assembly consists of a slide rail (405), a slide block (406), and a support claw (407). The slide rail (405) is fixed on the base plate (403), and the slide block (406) is slidably connected to the slide rail (405). The slide block (406) and the support claw (407) are elastically connected.

4. The positioning device of the downward through-layer drilling permeability enhancement extraction equipment according to claim 3, characterized in that: A stress sensor (408) is installed on the support claw (407), and the stress sensor (408) can monitor the stress of the support part of the support claw (407).

5. The positioning device for a downward through-layer drilling permeability enhancement extraction equipment according to claim 4, characterized in that: The slide member (406) includes: The housing (4061) has a closed cavity (4065) and an open cavity that are spaced apart; The slider (4064) is matched and slidably disposed within the closed cavity (4065); A slide bar (4062) is fixedly connected at one end to a slider (4064), and the other end of the slide bar (4062) is inserted into the opening and then fixedly connected to the support claw (407); And a spring (4063), which is disposed inside the opening and wrapped around the side wall of the slide bar (4062), one end of the spring (4063) is fixed to the bottom of the opening, and the other end of the spring (4063) is fixed to the support claw (407).

6. The positioning device for a downward through-layer drilling permeability enhancement extraction equipment according to claim 5, characterized in that: The opening mouth and the supporting claw (407) are slidably connected.

7. The positioning device of the downward through-layer drilling permeability enhancement extraction equipment according to claim 2, characterized in that: The drive section (2) includes: The cylindrical shell (201) is fixedly connected to the support plate (401); Two partitions (203) are provided and symmetrically fixed inside the shell (201), and a flow cavity (202) is formed between the two partitions (203). The inner shaft seat (204) is fixed inside the cylindrical shell (201); And a large drive tube (206), one end of which is driven and connected by an external motor, and the other end passes through the inner shaft seat (204) and two partitions (203) at one time, and then is fixedly connected to the small drive tube (207).

8. The positioning device of the downward through-layer drilling permeability enhancement extraction equipment according to claim 7, characterized in that: The small drive pipe (207) and the extraction pipe (5) are both connected to the central hole of the regulating plate (404).

9. The positioning device for a downward cross-layer drilling permeability enhancement extraction equipment according to claim 8, characterized in that: The large drive pipe (206) has an air port (205) on its side wall, and the air port (205) is connected to the flow chamber (202); The side opening of the shell (201) is connected to a drain pipe (3). One end of the drain pipe (3) is connected to the flow chamber (202), and the other end of the drain pipe (3) passes through the seal (1) and then connects to the external gas tank.

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