Multifunctional drilling machine for coal bed gas exploration and development and system thereof

Abstract

The invention relates to the technical field of coal bed gas exploration and development, in particular to a multifunctional drilling machine for coal bed gas exploration and development and a system thereof. The exploration assembly comprises a lifting mechanism, a lifting seat, a coring cylinder, a drill bit, a driving mechanism, a drilling mechanism, a placing mechanism and a clamping rod mechanism; the clamping rod mechanism comprises a mounting cylinder, a plurality of mounting shafts, a plurality of rotating plates, an adjusting piece and two side lugs; under the action of the lifting mechanism and the driving mechanism, the drill bit gradually drills into the ground, the cylindrical geological core sample gradually enters the coring cylinder, after drilling is completed, the drilling mechanism drills a vertical clamping hole in the geological core sample, the mounting cylinder is aligned with the clamping hole to be inserted into the clamping hole, the multiple rotating plates rotate to be unfolded and abut against the inner wall of the clamping hole, and then the geological core sample is taken out. Then the lifting mechanism drives the coring barrel to move upwards, and the geological core sample is taken out from the ground together; therefore, a complete geological core sample can be taken out, and the exploration accuracy is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of coalbed methane exploration and development, and particularly to a multi-functional drilling rig and its system for coalbed methane exploration and development. Background Art

[0002] Coalbed methane, also known as coal mine gas, is a gas resource associated with and coexisting with coal, and its main component is methane. With the increasing demand for clean energy and technological progress, coalbed methane, as an important unconventional natural gas resource, has received more and more attention in the process of its exploration and development. During the exploration of coalbed methane, samples of the target coal seam are usually taken for analysis and testing.

[0003] The prior art (CN113309477A) discloses a multi-functional drilling rig for coalbed methane exploration and development applicable to multi-coal seam conditions. First, the positioning mechanism is used to stably support the device, and the first motor, driving pulley and belt are arranged to drive the drilling pipe to rotate, so as to drive the drilling teeth to quickly drill the ground. At the same time, through the U-shaped frame, the first hydraulic cylinder, the I-shaped sleeve, the driving plate and the upper connecting plate, the drilling pipe can be driven to move up and down, so as to achieve the purpose of deep drilling. At the same time, the second motor drives the rotating shaft to drive the crushing knife and the L-shaped tool rest to crush the coal soil at the bottom end inside the drilling pipe, and the spiral blade will push the crushed coal soil upward inside the drilling pipe, so that the material driving mechanism will orderly drive the coal soil into the discharging mechanism, so as to facilitate unified material collection, thus achieving the multi-functional effect.

[0004] However, by using the above method, the obtained geological core samples are broken and cannot provide important information such as the structure, structure and thickness of the coal seam and surrounding rocks, which affects the accuracy of exploration. Summary of the Invention

[0005] The purpose of the present invention is to provide a multi-functional drilling rig and its system for coalbed methane exploration and development, which can take out complete geological core samples and improve the exploration accuracy.

[0006] To achieve the above object, in the first aspect, the present invention provides a multi-functional drilling rig for coalbed methane exploration and development, including a trailer;

[0007] It further includes an exploration component;

[0008] The exploration component includes a lifting mechanism, a lifting seat, a core barrel, a drill bit, a driving mechanism, a drilling mechanism, a placing mechanism and a clamping rod mechanism;

[0009] The lifting mechanism is arranged on one side of the trailer; the lifting seat is arranged on the lifting mechanism and can be driven by the lifting mechanism to move up and down; the core barrel is rotatably arranged on the lifting seat; the drill bit is fixedly arranged at the bottom of the core barrel; the driving mechanism is arranged on the side of the core barrel and is used to drive the core barrel to rotate; the drilling mechanism is arranged on the top of the lifting seat; the placing mechanism is arranged on the top of the lifting seat; the clamping rod mechanism is placed on the placing mechanism;

[0010] The clamping rod mechanism includes a mounting cylinder, a plurality of mounting shafts, a plurality of rotating plates, an adjusting member and two side ears;

[0011] The mounting cylinder has a plurality of side holes, and every four side holes form a group. The four side holes in the same group are circumferentially and evenly distributed at the same height; one mounting shaft is fixedly arranged in each side hole; one rotating plate is rotatably arranged on each mounting shaft, and the bottom end of the rotating plate is rotatably connected to the mounting shaft; the adjusting member is arranged on the mounting cylinder and is used to drive the plurality of rotating plates to rotate; the two side ears are respectively fixedly arranged on the side of the mounting cylinder.

[0012] Wherein, the adjusting member includes a slider, a driving rod, a plurality of connecting rods, a screw rod and a knob;

[0013] The slider is slidably arranged in the mounting cylinder; the driving rod is fixedly arranged at the bottom of the slider; one end of each connecting rod is rotatably connected to one rotating plate, and the other end of each connecting rod is rotatably connected to the driving rod; the screw rod is rotatably connected to the slider, threadedly connected to the mounting cylinder and passes through the mounting cylinder; the knob is fixedly arranged at the top of the screw rod.

[0014] Wherein, the lifting mechanism includes two mounting plates, two guide rods, a lead screw and a first motor;

[0015] The two mounting plates are respectively fixedly arranged on the side of the trailer; the two guide rods are fixedly arranged between the two mounting plates and are slidably connected to the lifting seat; the lead screw is rotatably arranged on the two mounting plates and is threadedly connected to the lifting seat; the first motor is fixedly arranged on the upper mounting plate, and the output end of the first motor is fixedly connected to the lead screw.

[0016] Wherein, the driving mechanism includes a gear ring, a second motor and a gear;

[0017] The gear ring is fixedly arranged on the core barrel; the second motor is fixedly arranged on the lifting seat; the gear is fixedly arranged at the output end of the second motor and meshes with the gear ring.

[0018] Among them, the drilling mechanism includes a multi-stage hydraulic cylinder, a mounting seat, a third motor, and a spiral drill rod;

[0019] The multi-stage hydraulic cylinder is fixedly arranged on the top of the lifting seat; the mounting seat is rotatably arranged at the output end of the multi-stage hydraulic cylinder; the third motor is fixedly arranged on the top of the mounting seat; the spiral drill rod is rotatably arranged on the mounting seat and is fixedly connected to the output end of the third motor.

[0020] Among them, the drilling mechanism further includes a limiting rod, a mounting box, and a limiting block;

[0021] The limiting rod is fixedly arranged on the top of the lifting seat; the mounting box is fixedly arranged on one side of the mounting seat; the limiting block is slidably arranged inside the mounting box, is slidably connected to the limiting rod, and is penetrated by the limiting rod.

[0022] Among them, the drilling mechanism further includes a mounting rod and a spring;

[0023] The mounting rod is fixedly arranged in the mounting box and is slidably connected to the limiting block; the spring is sleeved on the mounting rod.

[0024] Among them, the placing mechanism includes a vertical rod, a U-shaped clamp, and a hand-tightening screw;

[0025] The vertical rod is fixedly arranged on the top of the lifting seat; the U-shaped clamp is fixedly arranged on the top of the vertical rod; the hand-tightening screw is threadedly connected to the U-shaped clamp and is located on one side of the U-shaped clamp.

[0026] Among them, the exploration component further includes a stabilizing plate;

[0027] The stabilizing plate is fixedly arranged on one side of the lower mounting plate and is penetrated by the core barrel.

[0028] In a second aspect, the present invention further provides a multi-functional system for coalbed methane exploration and development, including the multi-functional drilling rig for coalbed methane exploration and development described above.

[0029] A multi-functional drilling rig and its system for coalbed methane exploration and development according to the present invention, when in use, move the trailer to a designated position, start the drive mechanism to drive the core barrel to rotate, and then the lifting mechanism drives the lifting seat to move downward, so that the drill bit gradually drills into the ground, and the cylindrical geological core sample gradually enters the core barrel. After drilling is completed, start the drilling mechanism, enter from the opening at the top of the core barrel, drill a vertical clamping hole in the geological core sample, then remove the installation cylinder from the placement mechanism, pass the installation cylinder through the opening at the top of the core barrel, and insert it into the clamping hole until the two side ears contact the top of the core barrel. Then, use the adjusting member to drive the rotation and expansion of the plurality of rotating plates, extend out from the side holes, and press against the inner wall of the clamping hole. Then, the lifting mechanism drives the core barrel to move upward, and the core barrel drives the installation cylinder to move upward through the two side ears, and takes out the geological core sample from the ground together. Finally, use the adjusting member again to drive the rotation of the plurality of rotating plates and retract them into the corresponding side holes, no longer stuck in the clamping hole, then the installation cylinder can be moved upward and taken out, and then the complete geological core sample can be slowly taken out from the core barrel; thus, a complete geological core sample can be taken out, improving the exploration accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art.

[0031] Figure 1 It is a schematic structural diagram of the first embodiment of the present invention.

[0032] Figure 2 It is a front view of the first embodiment of the present invention.

[0033] Figure 3 It is a schematic structural diagram of another angle of the first embodiment of the present invention.

[0034] Figure 4 It is Figure 3 A partial enlarged view of detail A.

[0035] Figure 5 It is a cross-sectional view of the clamping rod mechanism of the first embodiment of the present invention.

[0036] Figure 6 It is Figure 5 A partial enlarged view of detail B.

[0037] Figure 7 It is a schematic structural diagram of another angle of the first embodiment of the present invention.

[0038] Figure 8 It is Figure 7 A partial enlarged view of detail C.

[0039] 1 - Trailer, 2 - Lifting mechanism, 3 - Lifting seat, 4 - Core barrel, 5 - Drill bit, 6 - Driving mechanism, 7 - Drilling mechanism, 8 - Placing mechanism, 9 - Clamping rod mechanism, 10 - Stabilizing plate, 21 - Mounting plate, 22 - Guide rod, 23 - Lead screw, 24 - First motor, 61 - Ring gear, 62 - Second motor, 63 - Gear, 71 - Multi - stage hydraulic cylinder, 72 - Mounting seat, 73 - Third motor, 74 - Auger stem, 75 - Limiting rod, 76 - Mounting box, 77 - Limiting block, 78 - Mounting rod, 79 - Spring, 81 - Upright rod, 82 - U - shaped clamp, 83 - Hand - tightened screw, 91 - Mounting cylinder, 92 - Mounting shaft, 93 - Rotating plate, 94 - Adjusting part, 95 - Side ear, 911 - Side hole, 941 - Slide block, 942 - Driving rod, 943 - Connecting rod, 944 - Screw rod, 945 - Knob. Detailed implementation mode

[0040] The first embodiment of this application is as follows:

[0041] Please refer to Figures 1 - 8 , where Figure 1 is the structural schematic diagram of the first embodiment of the present invention. Figure 2 is the front view of the first embodiment of the present invention. Figure 3 is the structural schematic diagram of the first embodiment of the present invention from another angle. Figure 4 is Figure 3 the partial enlarged view of detail A. Figure 5 is the cross - sectional view of the clamping rod mechanism of the first embodiment of the present invention. Figure 6 is Figure 5 the partial enlarged view of detail B. Figure 7 is the structural schematic diagram of the first embodiment of the present invention from another angle. Figure 8 is Figure 7 the partial enlarged view of detail C.

[0042] The present invention provides a multi-functional drilling rig for coalbed methane exploration and development, which includes a trailer 1; and also includes an exploration component; the exploration component includes a lifting mechanism 2, a lifting seat 3, a core barrel 4, a drill bit 5, a driving mechanism 6, a drilling mechanism 7, a placement mechanism 8 and a clamping rod mechanism 9; the clamping rod mechanism 9 includes a mounting cylinder 91, a plurality of mounting shafts 92, a plurality of rotating plates 93, an adjusting member 94 and two side ears 95; the mounting cylinder 91 has a plurality of side holes 911; the adjusting member 94 includes a slider 941, a driving rod 942, a plurality of connecting rods 943, a screw rod 944 and a knob 945; the lifting mechanism 2 includes two mounting plates 21, two guide rods 22, a lead screw 23 and a first motor 24; the driving mechanism 6 includes a gear ring 61, a second motor 62 and a gear 63; the drilling mechanism 7 includes a multi-stage hydraulic cylinder 71, a mounting seat 72, a third motor 73 and a screw drill rod 74; the drilling mechanism 7 further includes a limiting rod 75, a mounting box 76 and a limiting block 77; the drilling mechanism 7 further includes a mounting rod 78 and a spring 79; the placement mechanism 8 includes a vertical rod 81, a U-shaped clamp 82 and a hand-tightening screw 83; the exploration component further includes a stabilizing plate 10; through the foregoing solution, a complete geological core sample can be taken out, and the exploration accuracy can be improved.

[0043] For this specific embodiment, the lifting mechanism 2 is arranged on one side of the trailer 1; the lifting seat 3 is arranged on the lifting mechanism 2 and can be driven by the lifting mechanism 2 to lift and lower; the core barrel 4 is rotatably arranged on the lifting seat 3; the drill bit 5 is fixedly arranged at the bottom of the core barrel 4; the driving mechanism 6 is arranged on the side of the core barrel 4 and is used to drive the core barrel 4 to rotate; the drilling mechanism 7 is arranged on the top of the lifting seat 3; the placement mechanism 8 is arranged on the top of the lifting seat 3; the clamping rod mechanism 9 is placed on the placement mechanism 8;

[0044] The mounting cylinder 91 has a plurality of side holes 911. Every four side holes 911 form a group, and the four side holes 911 in the same group are evenly distributed in a circle at the same height; one mounting shaft 92 is fixedly arranged in each side hole 911; one rotating plate 93 is rotatably arranged on each mounting shaft 92, and the bottom end of the rotating plate 93 is rotatably connected to the mounting shaft 92; the adjusting member 94 is arranged on the mounting cylinder 91 and is used to drive a plurality of rotating plates 93 to rotate; two side ears 95 are respectively fixedly arranged on the side of the mounting cylinder 91.

[0045] In this embodiment, the lifting mechanism 2 is used to drive the lifting of the lifting seat 3, thereby driving the lifting of the core barrel 4; the driving mechanism 6 drives the rotation of the core barrel 4, thereby driving the rotation of the drill bit 5; the drilling mechanism 7 is used to drill a clamping hole in the geological core sample, and the clamping rod mechanism 9 is used to insert into the clamping hole and clamp inside the geological core sample; the bottom end of the rotating plate 93 is rotatably connected to the mounting shaft 92, so the rotating plate 93 can rotate around the mounting shaft 92. Under the driving and adjustment of the adjusting member 94, multiple rotating plates 93 can rotate, change from vertical to inclined, and expand in an inverted umbrella shape, and extend out from the side holes 911;

[0046] During use, move the trailer 1 to the designated position, start the driving mechanism 6 to drive the rotation of the core barrel 4, and then the lifting mechanism 2 drives the lifting seat 3 to move downward, so that the drill bit 5 gradually drills into the ground, and the cylindrical geological core sample gradually enters the core barrel 4. After drilling is completed, start the drilling mechanism 7, enter from the opening at the top of the core barrel 4, drill a vertical clamping hole in the geological core sample, then remove the mounting cylinder 91 from the placement mechanism 8, pass the mounting cylinder 91 through the opening at the top of the core barrel 4, and insert it into the clamping hole until the two side ears 95 contact the top of the core barrel 4. Then, use the adjusting member 94 to drive multiple rotating plates 93 to rotate and expand, extend out from the side holes 911, and press against the inner wall of the clamping hole. Then, the lifting mechanism 2 drives the core barrel 4 to move upward, and the core barrel 4 drives the mounting cylinder 91 to move upward through the two side ears 95, and takes out the geological core sample from the ground together. Finally, use the adjusting member 94 to drive multiple rotating plates 93 to rotate and retract into the corresponding side holes 911, no longer stuck in the clamping hole, then the mounting cylinder 91 can be moved upward and removed, and then the complete geological core sample can be slowly taken out from the core barrel 4; thus, a complete geological core sample can be taken out, improving the exploration accuracy.

[0047] Further, the adjusting member 94 includes a slider 941, a driving rod 942, multiple connecting rods 943, a screw rod 944, and a knob 945;

[0048] The slider 941 is slidably arranged in the mounting cylinder 91; the driving rod 942 is fixedly arranged at the bottom of the slider 941; one end of each connecting rod 943 is rotatably connected to a rotating plate 93, and the other end of each connecting rod 943 is rotatably connected to the driving rod 942; the screw rod 944 is rotatably connected to the slider 941, threadedly connected to the mounting cylinder 91, and passes through the mounting cylinder 91; the knob 945 is fixedly arranged at the top of the screw rod 944.

[0049] In this embodiment, the knob 945 is used to facilitate the turning of the screw rod 944. By turning the screw rod 944, the slider 941 can be driven to slide up and down. When the slider 941 slides down, the driving rod 942 is driven to move downward. The driving rod 942 drives a plurality of the rotating plates 93 to rotate through a plurality of the connecting rods 943, changing from vertical to inclined, unfolding in an inverted umbrella shape, and extending out from the side holes 911. When the slider 941 slides up, the driving rod 942 is driven to move upward. The driving rod 942 drives a plurality of the rotating plates 93 to rotate through a plurality of the connecting rods 943, changing from inclined to vertical, and each retracting into the corresponding side hole 911.

[0050] Furthermore, the lifting mechanism 2 includes two mounting plates 21, two guide rods 22, a lead screw 23, and a first motor 24.

[0051] The two mounting plates 21 are respectively fixedly arranged on the side of the trailer 1. The two guide rods 22 are fixedly arranged between the two mounting plates 21 and are slidably connected to the lifting seat 3. The lead screw 23 is rotatably arranged on the two mounting plates 21 and is threadedly connected to the lifting seat 3. The first motor 24 is fixedly arranged on the upper mounting plate 21, and the output end of the first motor 24 is fixedly connected to the lead screw 23.

[0052] In this embodiment, the two mounting plates 21 are used to mount the two guide rods 22. The two guide rods 22 are used to slidably mount the lifting seat 3. The first motor 24 drives the lead screw 23 to rotate, and the lead screw 23 then drives the lifting seat 3 to slide up and down along the two guide rods 22.

[0053] Furthermore, the driving mechanism 6 includes a gear ring 61, a second motor 62, and a gear 63.

[0054] The gear ring 61 is fixedly arranged on the core barrel 4. The second motor 62 is fixedly arranged on the lifting seat 3. The gear 63 is fixedly arranged on the output end of the second motor 62 and meshes with the gear ring 61.

[0055] In this embodiment, the second motor 62 drives the gear 63 to rotate. The gear 63 then drives the meshing gear ring 61 to rotate. The gear ring 61 drives the core barrel 4 to rotate, and the core barrel 4 drives the drill bit 5 to rotate.

[0056] Furthermore, the drilling mechanism 7 includes a multi-stage hydraulic cylinder 71, a mounting seat 72, a third motor 73, and a spiral drill rod 74.

[0057] The multi-stage hydraulic cylinder 71 is fixedly arranged at the top of the lifting seat 3; the mounting seat 72 is rotatably arranged at the output end of the multi-stage hydraulic cylinder 71; the third motor 73 is fixedly arranged at the top of the mounting seat 72; the screw drill rod 74 is rotatably arranged on the mounting seat 72 and is fixedly connected to the output end of the third motor 73.

[0058] In this embodiment, the multi-stage hydraulic cylinder 71 drives the mounting seat 72 to move downward, the mounting seat 72 drives the screw drill rod 74 to move downward, the screw drill rod 74 passes through the opening at the top of the core barrel 4, and under the drive of the third motor 73, a vertical clamping hole is drilled in the cylindrical geological core sample.

[0059] Furthermore, the drilling mechanism 7 further includes a limiting rod 75, a mounting box 76 and a limiting block 77;

[0060] The limiting rod 75 is fixedly arranged at the top of the lifting seat 3; the mounting box 76 is fixedly arranged on one side of the mounting seat 72; the limiting block 77 is slidably arranged inside the mounting box 76, is slidably connected to the limiting rod 75, and is penetrated by the limiting rod 75.

[0061] In this embodiment, when the mounting seat 72 moves up and down, it drives the mounting box 76 to move up and down, and the limiting block 77 also moves up and down accordingly. Since the limiting block 77 is slidably sleeved on the limiting rod 75, the mounting seat 72 will not rotate when moving up and down; when the mounting seat 72 moves downward and drives the screw drill rod 74 to drill a clamping hole in the geological core sample, the multi-stage hydraulic cylinder 71 drives the mounting seat 72 to reset and move up to the topmost position, and then the limiting block 77 can be manually slid upward so that the limiting block 77 disengages from the top of the limiting rod 75. At this time, the mounting seat 72 can be rotated to move the screw drill rod 74 away from the top of the core barrel 4, which is convenient for inserting the mounting cylinder 91 subsequently.

[0062] Furthermore, the drilling mechanism 7 further includes a mounting rod 78 and a spring 79;

[0063] The mounting rod 78 is fixedly arranged in the mounting box 76 and is slidably connected to the limiting block 77; the spring 79 is sleeved on the mounting rod 78.

[0064] In this embodiment, the mounting rod 78 is used to mount the spring 79, and the spring 79 gives the limiting block 77 an elastic force, so that the limiting block 77 is close to the inner bottom end of the mounting box 76 and moves up and down with the mounting box 76 as synchronously as possible.

[0065] Furthermore, the placing mechanism 8 includes a vertical rod 81, a U-shaped clamp 82 and a hand-tightening screw 83;

[0066] The vertical rod 81 is fixedly arranged on the top of the lifting seat 3; the U-shaped clamp 82 is fixedly arranged on the top of the vertical rod 81; the hand-tightening screw 83 is threadedly connected to the U-shaped clamp 82 and is located on one side of the U-shaped clamp 82.

[0067] In this embodiment, the vertical rod 81 supports the U-shaped clamp 82. The installation cylinder 91 is located inside the U-shaped clamp 82 and is hung on the U-shaped clamp 82 through two side ears 95. The hand-tightening screw 83 arranged on the side blocks it. Unscrew the hand-tightening screw 83, and the installation cylinder 91 can be removed.

[0068] Furthermore, the exploration assembly further includes a stabilizing plate 10;

[0069] The stabilizing plate 10 is fixedly arranged on one side of the lower mounting plate 21 and is penetrated by the core barrel 4.

[0070] In this embodiment, the stabilizing plate 10 guides the core barrel 4.

[0071] For the multi-functional drill for coalbed methane exploration and development described in this embodiment, during use, move the trailer 1 to the designated position, start the driving mechanism 6 to drive the core barrel 4 to rotate, and then the lifting mechanism 2 drives the lifting seat 3 to move downward, so that the drill bit 5 gradually drills into the ground, and the cylindrical geological core sample gradually enters the core barrel 4. After drilling is completed, start the drilling mechanism 7, enter from the opening at the top of the core barrel 4, drill a vertical clamping hole in the geological core sample, then remove the installation cylinder 91 from the placement mechanism 8, pass the installation cylinder 91 through the opening at the top of the core barrel 4, and insert it into the clamping hole until the two side ears 95 contact the top of the core barrel 4. Then use the adjusting member 94 to drive the plurality of rotating plates 93 to rotate and unfold, extend out from the side holes 911, and press against the inner wall of the clamping hole. Then the lifting mechanism 2 drives the core barrel 4 to move upward, and the core barrel 4 drives the installation cylinder 91 to move upward through the two side ears 95, and the geological core sample is taken out of the ground together. Finally, use the adjusting member 94 again to drive the plurality of rotating plates 93 to rotate and retract into the corresponding side holes 911, no longer stuck in the clamping hole, then the installation cylinder 91 can be moved upward and removed, and then the complete geological core sample is slowly taken out from the core barrel 4; thus, a complete geological core sample can be taken out to improve the exploration accuracy.

[0072] The second embodiment of this application is:

[0073] A multi-functional system for coalbed methane exploration and development provided by the present invention includes the multi-functional drill for coalbed methane exploration and development described above.

[0074] The above disclosure is only one or more preferred embodiments of the present application, and cannot be used to limit the scope of rights of the present application. Those of ordinary skill in the art can understand all or part of the processes of implementing the above embodiments, and the equivalent changes made according to the claims of the present application still fall within the scope covered by the present application.

Claims

1. A multi-functional drilling rig for coalbed methane exploration and development, including a trailer; characterized in that, it further includes an exploration component; the exploration component includes a lifting mechanism, a lifting seat, a core barrel, a drill bit, a driving mechanism, a drilling mechanism, a placement mechanism and a clamping rod mechanism; the lifting mechanism is arranged on one side of the trailer; the lifting seat is arranged on the lifting mechanism and can be driven by the lifting mechanism to move up and down; the core barrel is rotatably arranged on the lifting seat; the drill bit is fixedly arranged at the bottom of the core barrel; the driving mechanism is arranged on the side of the core barrel for driving the core barrel to rotate; the drilling mechanism is arranged on the top of the lifting seat; the placement mechanism is arranged on the top of the lifting seat; the clamping rod mechanism is placed on the placement mechanism; the clamping rod mechanism includes an installation cylinder, a plurality of installation shafts, a plurality of rotating plates, an adjusting member and two side ears; the installation cylinder has a plurality of side holes, and every four side holes form a group. The four side holes in the same group are evenly distributed in a circle at the same height; one installation shaft is fixedly arranged in each side hole; one rotating plate is rotatably arranged on each installation shaft, and the bottom end of the rotating plate is rotatably connected to the installation shaft; the adjusting member is arranged on the installation cylinder for driving a plurality of the rotating plates to rotate; the two side ears are respectively fixedly arranged on the side of the installation cylinder.

2. The multi-functional drilling rig for coalbed methane exploration and development according to claim 1, characterized in that, the adjusting member includes a slider, a driving rod, a plurality of connecting rods, a screw rod and a knob; the slider is slidably arranged in the installation cylinder; the driving rod is fixedly arranged at the bottom of the slider; one end of each connecting rod is rotatably connected to one rotating plate, and the other end of each connecting rod is rotatably connected to the driving rod; the screw rod is rotatably connected to the slider, threadedly connected to the installation cylinder and passes through the installation cylinder; the knob is fixedly arranged at the top of the screw rod.

3. The multi-functional drilling rig for coalbed methane exploration and development according to claim 2, characterized in that, the lifting mechanism includes two mounting plates, two guide rods, a lead screw and a first motor; the two mounting plates are respectively fixedly arranged on the side of the trailer; the two guide rods are fixedly arranged between the two mounting plates and are slidably connected to the lifting seat; the lead screw is rotatably arranged on the two mounting plates and is threadedly connected to the lifting seat; the first motor is fixedly arranged on the upper mounting plate, and the output end of the first motor is fixedly connected to the lead screw.

4. The multi-functional drilling rig for coalbed methane exploration and development according to claim 3, characterized in that, the driving mechanism includes a gear ring, a second motor and a gear; the gear ring is fixedly arranged on the core barrel; the second motor is fixedly arranged on the lifting seat; the gear is fixedly arranged at the output end of the second motor and meshes with the gear ring.

5. The multi-functional drilling rig for coalbed methane exploration and development according to claim 4, characterized in that, the drilling mechanism includes a multi-stage hydraulic cylinder, a mounting seat, a third motor and a spiral drill rod; The multi-stage hydraulic cylinder is fixedly arranged at the top of the lifting seat; the mounting seat is rotatably arranged at the output end of the multi-stage hydraulic cylinder; the third motor is fixedly arranged at the top of the mounting seat; the screw drill rod is rotatably arranged on the mounting seat and is fixedly connected to the output end of the third motor.

6. The multi-functional drilling rig for coalbed methane exploration and development according to claim 5, wherein the drilling mechanism further comprises a limiting rod, a mounting box and a limiting block; the limiting rod is fixedly arranged at the top of the lifting seat; the mounting box is fixedly arranged on one side of the mounting seat; the limiting block is slidably arranged inside the mounting box, is slidably connected to the limiting rod and is penetrated by the limiting rod.

7. The multi-functional drilling rig for coalbed methane exploration and development according to claim 6, wherein the drilling mechanism further comprises a mounting rod and a spring; the mounting rod is fixedly arranged inside the mounting box and is slidably connected to the limiting block; the spring is sleeved on the mounting rod.

8. The multi-functional drilling rig for coalbed methane exploration and development according to claim 7, wherein the placing mechanism comprises a vertical rod, a U-shaped clamp and a hand-tightening screw; the vertical rod is fixedly arranged at the top of the lifting seat; the U-shaped clamp is fixedly arranged at the top of the vertical rod; the hand-tightening screw is threadedly connected to the U-shaped clamp and is located on one side of the U-shaped clamp.

9. The multi-functional drilling rig for coalbed methane exploration and development according to claim 8, wherein the exploration assembly further comprises a stabilizing plate; the stabilizing plate is fixedly arranged on one side of the lower mounting plate and is penetrated by the core barrel.

10. A multi-functional system for coalbed methane exploration and development, characterized in that it comprises a multi-functional drilling rig for coalbed methane exploration and development according to any one of claims 1 to 9.

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