A gas sampling device for drilling

Abstract

This invention relates to the field of geological exploration technology, and in particular to a gas-while-drilling (WSD) sampling device. Addressing the problems of existing WSD devices' inability to conveniently collect gas from different locations and their inability to effectively separate cuttings and mud from the gas during sampling, this invention proposes the following solution: The device includes a drill rod, characterized in that the drill rod has an internal mounting cavity, a feed pipe fixed to the inner wall of one side of the drill rod below a positioning plate, and a feed inlet communicating with the feed pipe is opened on the outer wall of the drill rod. This invention utilizes the kinetic energy generated by air pressure for gas collection, thereby avoiding the need for electrical components inside the drill rod, reducing the frequency of component damage. It also allows for convenient gas collection from different locations and effectively prevents cuttings or mud from mixing with the collected gas, facilitating use by sampling personnel.

Description

Technical Field

[0001] This invention relates to the field of geological exploration, and more particularly to a gas-while-drilling acquisition device. Background Technology

[0002] In geological exploration, the collection of underground gases is often involved, thus requiring gas-while-drilling (GWD) devices. The main component of existing GWD devices is the collection chamber, which collects gas at specific locations as the drill bit travels. After the drill bit is withdrawn from the ground, the collection chamber is retrieved to collect the gas inside.

[0003] However, the current collection chamber has some shortcomings in use, which causes some problems. On the one hand, it cannot collect gas from multiple areas in different locations. On the other hand, it cannot effectively prevent slag or mud from mixing with the gas during the collection process. Therefore, this solution proposes a gas collection device while drilling. Summary of the Invention

[0004] The present invention proposes a gas-while-drilling acquisition device, which solves the problems of existing gas-while-drilling acquisition devices being unable to conveniently acquire gas from different locations and being unable to effectively separate slag and mud from gas during the gas acquisition process.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A gas collection device while drilling includes a drill rod, an installation cavity inside the drill rod, a feed pipe fixed on one inner wall of the drill rod below a positioning plate, a feed port communicating with the feed pipe on the outer wall of the drill rod, and a detachable collection mechanism installed in the installation cavity.

[0007] The collection mechanism includes a collection chamber, a transition box fixed to the bottom of the collection chamber, a fixed pipe fixed to the top of the transition box, and an insertion pipe fixed to the bottom of the transition box. An installation pipe is installed at the other end of the fixed pipe, and a one-way valve is installed on the installation pipe. The collection chamber is composed of multiple air chambers fixed together in a vertical direction. The multiple air chambers are connected to the fixed pipe through branch pipes. A gate valve is installed on the branch pipe. A collection pipe is also installed on the side of the air chamber where the branch pipe is installed. A linkage component for driving the gate valve to open and close is installed on the outer wall of the air chamber. A piston plate is installed inside each of the multiple air chambers. An air extraction component for driving the piston plate to move away from the branch pipe is installed on the outer wall of the air chamber. One end of the insertion pipe is detachably connected to one end of the feed pipe. A fixing component for fixing the collection chamber is installed in the installation cavity.

[0008] The fixing assembly includes a pressure plate disposed in the mounting cavity and a locking member for locking the pressure plate. A connecting pipe is fixed on the pressure plate, and one end of the connecting pipe is detachably connected to the other end of the mounting pipe. An air supply pipe is fixed to the other end of the connecting pipe, and the other end of the air supply pipe extends to the outside of the drill pipe and is connected to external gas to purge the residual gas in the fixing pipe and the transition box. A transmission unit for driving the air extraction assembly and the linkage assembly is also installed on the pressure plate.

[0009] The above technical solution utilizes the kinetic energy generated by air pressure to collect gas, thereby avoiding the need to install electrical components inside the drill pipe, reducing the frequency of component damage, facilitating the collection of gas from different locations, and effectively preventing slag or mud from mixing with the collected gas, thus simplifying the use by the collection personnel.

[0010] As a further improvement to the above solution, a through hole is provided on the outer wall of the gas chamber on the side away from the branch pipe. The air extraction assembly includes an installation shaft installed on the outer wall of the gas chamber on the side with the through hole, a transmission gear and a rope wheel sleeved outside the installation shaft. A connecting rope is fixed in the rope groove of the rope wheel, and the other end of the connecting rope passes through the through hole and extends into the gas chamber and is fixedly connected to the outer wall of the piston plate.

[0011] The above technical solution utilizes the movement of piston plate one to create negative pressure inside the gas chamber, thereby drawing gas into the gas chamber for collection.

[0012] As a further improvement to the above solution, the transmission unit includes a fixed rod movably mounted on the pressure plate, an abutment plate fixed to the bottom of the fixed rod, and a transmission rack fixed to the outer wall of one side of the abutment plate for driving the transmission gear to rotate. The fixed rod is located on the side of the pressure plate away from the collection chamber, and a driving component for driving the fixed rod to move is installed in the mounting cavity.

[0013] The above technical solution can be used to drive the transmission gear to rotate, thereby winding up the connecting rope, which in turn can drive the piston plate to move.

[0014] As a further improvement to the above solution, the driving component includes a piston cylinder with an opening at one end fixed in the mounting cavity, a piston plate II installed in the piston cylinder, and a piston rod fixed on the outer wall of the piston plate II near the opening. The other end of the piston rod extends to the outside of the piston cylinder and is fixed to a fixing block. The end of the fixing rod away from the abutment plate is fixedly connected to the bottom surface of the fixing block. A pressure pipe communicating with the end of the piston cylinder away from the opening is installed, and the other end of the pressure pipe extends to the outside of the drill rod.

[0015] The above technical solution allows for the use of high-pressure gas input into the piston chamber to drive the piston plate to move, thereby causing the contact plate to move as well, achieving the goal of using air energy to drive the contact plate to move.

[0016] As a further improvement to the above solution, one end of the valve stem of the gate valve extends to the outside of the gate valve and is equipped with a fixed gear. The linkage assembly includes a transmission rod movably mounted on the outer wall of the gas chamber, a linkage rack fixed to one end of the transmission rod, a limiting plate movably sleeved on the outside of the transmission rod, and a spring. The linkage rack meshes with the fixed gear. One end of the limiting plate is fixed to the outer wall of the gas chamber. A spring catch is sleeved on the outside of the transmission rod. The spring is located between the spring catch and the limiting plate, and one end of the spring is fixed to the limiting plate, while the other end of the spring is fixed to the spring catch. The bottom of the abutment plate has a right-angled triangular structure, and the inclined surface of the right-angled triangle faces the gas chamber. The abutment plate cooperates with the transmission rod to drive it to move away from the abutment plate after abutting with the transmission rod.

[0017] The above technical solution uses a contact plate to drive the transmission rod to move, thereby opening the gate valve. After the contact plate is no longer pressed, the transmission rod can close the gate valve again under the rebound action of the spring, thus preventing the gas in the gas chamber from escaping.

[0018] As a further improvement to the above solution, a clearing assembly for unblocking the insertion tube is installed inside the transition box. The clearing assembly includes a gear ring rotatably connected to the inner wall of the top of the transition box, a side plate fixed to the bottom surface of the gear ring, a bottom plate fixed to the bottom surface of the side plate, a telescopic column installed on the inner wall of the top of the transition box, and a connecting piece installed on the side plate for driving the telescopic column to extend and retract. The inner wall of the transition box is a cylindrical structure, with the side plate abutting against the inner wall of the transition box and the bottom plate abutting against the inner wall of the bottom of the transition box. The telescopic column includes components fixed to the inner wall of the transition box. The top inner wall of the box has a fixed cylinder and a movably sleeved in the fixed cylinder. One end of the moving rod is connected to the inner wall of the fixed cylinder by a spring. The other end of the moving rod has a tapered structure and extends to the outside of the fixed cylinder. A fixed sleeve is fixedly sleeved on the outside of the moving rod. The top surface of the fixed sleeve is an inclined slope. The moving rod and the insertion tube are coaxially arranged. The connecting part includes a crossbar fixed on the side plate and a ball bearing installed on the bottom surface of the crossbar. The ball bearing abuts against the top surface of the fixed sleeve. A power component for driving the gear ring to rotate is installed on the outer wall of the collection chamber.

[0019] The above technical solution allows the unblocking rod to move up and down when emptying the gas remaining in the fixed pipe and the gas, slag and mud remaining in the transition box, thus avoiding blockage of the insertion pipe. At the same time, the mud adhering to the inner wall of the transition box can be removed through the side plate and bottom plate.

[0020] As a further improvement to the above solution, the power assembly includes a bellows installed on the outer wall of the collection chamber, a transition pipe fixed to the bottom of the bellows, an air outlet pipe fixed to one side of the outer wall of the transition pipe, a ground connection pipe fixed to the top of the bellows, and a rotating shaft rotatably connected to the inner wall of the transition pipe on the side away from the bellows. The bellows and the rotating shaft are connected. One end of the rotating shaft extends into the bellows and is equipped with a fan. The fan is directly opposite the ground connection pipe. The other end of the rotating shaft extends into the inner side of the transition box and is equipped with a connecting gear. The connecting gear is located inside the gear ring and meshes with the inner ring of the gear ring. Connecting pipe two and connecting pipe three are fixed on the pressure plate. One end of connecting pipe three is detachably connected to the other end of the air outlet pipe. One end of connecting pipe two is detachably connected to one end of the ground connection pipe. The other end of connecting pipe two is equipped with air supply pipe two, and the other end of connecting pipe three is equipped with an exhaust pipe. The other ends of the air supply pipe and the exhaust pipe both extend to the outside of the drill pipe.

[0021] The above technical solution utilizes external airflow to drive the fan to rotate, thereby generating kinetic energy and ultimately driving the shaft to rotate, enabling the unblocking components to function normally.

[0022] As a further improvement to the above solution, positioning plates are fixed on the inner walls of the opposite sides of the mounting cavity, the transition box is placed on top of the two positioning plates, and multiple positioning rods are fixed on the bottom surface of the pressure plate. Multiple positioning cylinders that match the positioning rods are fixed on the top of the collection chamber.

[0023] The above technical solution can fix the acquisition mechanism between the positioning plate and the pressure plate, preventing it from moving during acquisition.

[0024] As a further improvement to the above solution, the locking component includes a movable rod fixed to the top surface of the pressure plate and a fixed plate movably sleeved outside the movable rod. One end of the fixed plate is fixedly connected to the inner wall of the mounting cavity, and a locking bolt is threaded onto the outer wall of the fixed plate. One end of the locking bolt abuts against the outer wall of the movable rod.

[0025] The above technical solution can easily fix the pressure plate, thereby facilitating the disassembly and assembly of the collection mechanism.

[0026] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0027] 1. Through the cooperation of the linkage component, the air extraction component and the transmission unit, the gas at different locations can be drawn into different gas chambers. At the same time, through the setting of the transition box, the slag and mud mixed with the gas can be temporarily retained in the transition box when it enters the transition box, while the gas can enter different gas chambers through the fixed pipe and the branch pipe.

[0028] 2. Through the cooperation between the transition box, the unblocking component, the second air supply pipe, the exhaust pipe, the second connecting pipe, and the third connecting pipe, the gear ring can be driven to rotate by the air pressure provided by the outside. This allows the side plate and the bottom plate to scrape off the mud and water adhering to the inner wall of the transition box when the residual slag and mud in the transition box and the fixed pipe are discharged to the outside of the drill rod. At the same time, the unblocking rod is also continuously extended and retracted into the insertion pipe, thereby preventing the insertion pipe from being blocked.

[0029] 3. By using air pressure to drive the transmission unit and the unblocking mechanism, the installation of electrical components inside the drill pipe is eliminated, making operation more convenient. The collection mechanism can also be easily disassembled and assembled, making it easier for operators to use. Attached Figure Description

[0030] Figure 1 This is a front sectional view of the present invention;

[0031] Figure 2 for Figure 1 Enlarged view of point A in the middle;

[0032] Figure 3 for Figure 2 A front view of the data acquisition mechanism;

[0033] Figure 4 This is a front sectional view of the transition box;

[0034] Figure 5 A 3D view of the data acquisition mechanism;

[0035] Figure 6 This is a front sectional view of the transmission assembly;

[0036] Figure 7 This is a schematic diagram of the mechanism on the back of the collection chamber;

[0037] Figure 8 This is a front view of the present invention.

[0038] Explanation of key symbols:

[0039] 1. Drill rod; 2. Piston cylinder; 3. Fixing block; 4. Fixing rod; 5. Pressure plate; 6. Collection chamber; 7. Gas chamber; 8. Transition box; 9. Insertion tube; 10. Feed pipe; 11. Feed inlet; 12. Positioning plate; 13. Piston plate one; 14. Fixing pipe; 15. Branch pipe; 16. Gate valve; 17. Check valve; 18. Positioning rod; 19. Connecting pipe one; 20. Fixing plate; 21. Movable rod; 22. Gas supply pipe one; 23. Exhaust pipe; 24. Gas supply pipe two; 25. Transmission rack; 26. Transmission gear 27. Gear wheel; 28. Mounting shaft; 29. ​​Abutment plate; 30. Mounting plate; 31. Connecting pipe two; 32. Connecting pipe three; 33. Transmission rod; 34. Connecting pipe; 35. Rotating shaft; 36. Air box; 37. Transition pipe; 38. Air outlet pipe; 39. Side plate; 40. Fixing cylinder; 41. Gear ring; 42. Base plate; 43. Crossbar; 44. Fixing sleeve; 45. Unblocking rod; 46. Positioning cylinder; 47. Fan; 48. Fixing gear; 49. Spring clip; 50. Limiting plate; 51. Cover plate. Detailed Implementation

[0040] The present invention will now be further described in conjunction with the accompanying drawings and specific embodiments. It should be noted that, without conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0041] Example 1

[0042] Please combine Figure 1-3 , Figure 5 and Figure 7-8 This embodiment of a gas sampling device for drilling includes a drill rod 1. The drill rod 1 has an internal mounting cavity. A feed pipe 10 located below a positioning plate 12 is fixed on the inner wall of one side of the drill rod 1. A feed port 11 communicating with the feed pipe 10 is opened on the outer wall of the drill rod 1. A detachable sampling mechanism is installed in the mounting cavity. An operation port communicating with the mounting cavity is opened on the outer wall of the drill rod 1, and the operation port is sealed by a cover plate 51. The cover plate 51 is detachably fixed to the drill rod by bolts.

[0043] The collection mechanism includes a collection chamber 6, a transition box 8 fixed to the bottom of the collection chamber 6, a fixed pipe 14 fixed to the top of the transition box 8, and an insertion pipe 9 fixed to the bottom of the transition box 8. An installation pipe is installed at the other end of the fixed pipe 14, and a one-way valve 17 is installed on the installation pipe. The collection chamber 6 consists of multiple gas chambers 7 fixed together in a vertical direction. Each gas chamber 7 is connected to the fixed pipe 14 via a branch pipe 15, on which a gate valve 16 is installed. A collection pipe is also installed on the side of the gas chamber 7 where the branch pipe 15 is installed, and a valve is installed on the collection pipe. The collection pipe is used to discharge the gas collected in the gas chamber 7 after gas collection is completed. A piston plate 13 is installed inside each of the multiple gas chambers 7. A sealing ring 1 is fitted around the outer ring of the piston plate 13 to prevent the piston plate 13 from... Air leakage occurs between the gas chamber 7 and the inner wall. An air extraction assembly is installed on the outer wall of the gas chamber 7 to drive the piston plate 13 to move away from the branch pipe 15. A through hole is opened on the outer wall of the gas chamber 7 away from the branch pipe 15. The air extraction assembly includes a mounting shaft 28 installed on the outer wall of the gas chamber 7 with the through hole, a transmission gear 26 sleeved on the outside of the mounting shaft 28, and a rope wheel 27. A connecting rope is fixed in the rope groove of the rope wheel 27. The other end of the connecting rope extends through the through hole into the gas chamber 7 and is fixed to the outer wall of the piston plate 13. The rotation of the transmission gear 26 drives the rope wheel 27 to rotate, so that the connecting rope can be gradually wound onto the rope wheel 27, thereby pulling the piston plate 13 towards the through hole, thereby drawing the gas in the fixed pipe 14 into the interior of the gas chamber 7.

[0044] Positioning plates 12 are fixed on the inner walls of the two opposite sides of the mounting cavity. The transition box 8 is placed on top of the two positioning plates 12. Multiple positioning rods 18 are fixed on the bottom surface of the pressure plate 5. Multiple positioning cylinders 46 that match the positioning rods 18 are fixed on the top of the collection chamber 6. One end of the insertion tube 9 is detachably connected to one end of the feed tube 10. A fixing assembly for fixing the collection chamber 6 is installed in the mounting cavity. The fixing assembly includes a pressure plate 5 set in the mounting cavity and a locking member for locking the pressure plate 5. A connecting pipe 19 is fixed on the pressure plate 5, and one end of the connecting pipe 19 is detachably connected to the other end of the mounting tube. A gas supply pipe 21 is fixed to the other end of the connecting pipe 19, and the other end of the gas supply pipe 21 extends to the outside of the drill rod 1 and is connected to external gas to purge the residual gas in the fixing tube 14 and the transition box 8. The locking member is also included in the mounting cavity. The components include a movable rod 21 fixed to the top surface of the pressure plate 5 and a fixed plate 20 movably sleeved outside the movable rod 21. One end of the fixed plate 20 is fixed to the inner wall of the mounting cavity, and a locking bolt is threaded onto the outer wall of the fixed plate 20. One end of the locking bolt abuts against the outer wall of the movable rod 21. The pressure plate 5 is used to press and fix the collection mechanism between the positioning plate 12 and the pressure plate, while the positioning rod is inserted into the positioning cylinder 46, so that the collection mechanism can be installed in the mounting cavity. The static friction between the locking bolt and the movable rod 21 can lock the movable rod 21. The connection between the connecting pipe 19 and the mounting pipe is connected by a pipe clamp, which facilitates the disassembly and assembly of the two. Nitrogen gas is connected to the outside of the connecting pipe 19, so that the residual gas in the fixed pipe 14 and the transition box 8 can be purged by introducing nitrogen gas into the fixed pipe 14.

[0045] A linkage assembly for driving the gate valve 16 is installed on the outer wall of the gas chamber 7. A transmission unit for driving the air extraction assembly and the linkage assembly is also installed on the pressure plate 5. The transmission unit includes a fixed rod 4 movably mounted on the pressure plate 5, an abutment plate 29 fixed to the bottom of the fixed rod 4, and a transmission rack 25 fixed to one side of the outer wall of the abutment plate 29 for driving the transmission gear to rotate. The fixed rod 4 is located on the side of the pressure plate 5 away from the collection chamber 6. A driving component for driving the fixed rod 4 to move is installed in the mounting cavity. The driving component includes a piston cylinder 2 with an opening at one end fixed in the mounting cavity, a piston plate 2 installed in the piston cylinder 2, and an outer wall fixed to the side of the piston plate 2 near the opening. The piston rod is mounted on the upper part of the piston cylinder 2. The other end of the piston rod extends to the outside of the piston cylinder 2 and is fixed to a fixing block 3. The end of the fixing rod 4 away from the abutment plate 29 is fixed to the bottom surface of the fixing block 3. The end of the piston cylinder 2 away from the opening is equipped with a pressure pipe 30 communicating with it, and the other end of the pressure pipe 30 extends to the outside of the drill rod 1. One end of the valve stem of the gate valve 16 extends to the outside of the gate valve 16 and is equipped with a fixing gear 48. The linkage assembly includes a transmission rod 33 movably mounted on the outer wall of the air chamber 7, a linkage rack fixed to one end of the transmission rod 33, a limiting plate 50 movably sleeved on the outside of the transmission rod 33, and a spring. The linkage rack meshes with the fixing gear 48, and one end of the limiting plate 50 is fixed to the outside of the air chamber 7. On the wall, a spring clip 49 is sleeved on the outside of the transmission rod 33. A spring is located between the spring clip 49 and the limiting plate 50, with one end of the spring fixed to the limiting plate 50 and the other end fixed to the spring clip 49. The bottom of the abutment plate 29 is a right-angled triangle structure, with the inclined surface of the right-angled triangle facing the air chamber 7. The abutment plate 29 cooperates with the transmission rod 33 to drive it to move away from the abutment plate 29 after abutting with the transmission rod 33. The pressurization pipe 30 is connected to an external air compressor. By supplying gas into the piston cylinder 2, it drives the piston plate 2 to move out of the piston cylinder 2, thereby using air kinetic energy to drive the abutment plate 29 to move, and finally remove the abutment plate 29 from the transmission rod 33. The moving rod 33 contacts and presses the transmission rod 33 away from the abutment plate 29. The spring is thus compressed, thereby opening the gate valve 16 before starting to drive the piston plate 13 in the air chamber 7 to move. When one end of the transmission rod 33 abuts against the vertical surface of the abutment plate 29, the transmission rod 33 stops rotating, and the gate valve 16 is fully opened. Then the abutment plate 29 continues to descend, and the transmission rack 25 meshes with the trigger gear 48, thereby driving the air extraction assembly to work, causing the piston plate 13 to move closer to the through hole. After the abutment plate 29 passes the transmission rod 33 on one side of the air chamber, the transmission rod 33 moves back to its original position under the action of the spring, thereby closing the gate valve 16.

[0046] The implementation principle of this embodiment is as follows: When the drill bit descends to the gas collection position, gas is input into the piston cylinder 2 through an external air compressor, thereby increasing the internal pressure drop. The piston plate 2 then moves towards the side of the piston cylinder 2 with the opening, which in turn drives the fixed rod 4 to move. The fixed rod 4 then drives the abutment plate 29 to move until the bottom of the abutment plate 29 contacts the transmission rod 33 on the uppermost gas chamber 7. The transmission rod 33 is then moved away from the abutment plate 29 until the end of the transmission rod 33 that abuts the abutment plate 29 moves from the bottom inclined surface of the abutment plate 29 to the vertical surface on its side. At this point, the transmission rod 33 stops moving. During this process, the spring 1 is compressed, and the fixed gear 48 also begins to rotate forward under the drive of the transmission rod 33, thereby opening the gate valve 16. After the gate valve 16 is opened, the transmission rack 25 begins to mesh with the transmission gear 26 as the abutment plate 29 moves downward. During the movement, the drive gear 26 rotates, which in turn drives the rope wheel 27 to rotate, thus gradually winding the connecting rope onto the rope wheel 27. This pulls the piston plate 13 at the other end of the connecting rope to move closer to the through hole, thereby drawing outside gas into the transition box 8 through the feed port. Then, it enters the branch pipe 15 of the gate valve 16 through the fixed pipe 14, and finally enters the corresponding air chamber 7 through the branch pipe 15. The piston plate 13 stops moving when the drive rack 25 stops moving or when the drive rack 25 passes the drive gear 26. When the drive rack 25 passes the drive gear 26, the drive rod 33, which abuts against the side of the abutment plate 29, also passes the abutment plate 29. Under the rebound of the spring, the drive rod 33 moves closer to the abutment plate 29, thereby driving the fixed gear 48 to reverse and closing the gate valve 16.

[0047] When external gas enters the transition box 8 through the feed inlet 11, the slag and mud entering the transition box 8 along with the gas will be temporarily stored in the transition box 8 under the action of gravity, while the gas can continue to enter the fixed pipe 14. When it is necessary to collect gas from another location later, high-pressure nitrogen can be introduced into the fixed pipe 14 through the gas supply pipe 22 to blow the gas remaining in the fixed pipe 14 back into the transition box 8. Nitrogen can be introduced again to discharge all the gas, slag and mud remaining in the transition box 8 into the feed pipe 10 through the insertion pipe 9, and finally discharged from the feed inlet 11. This avoids interference from the gas at the previous location when collecting gas at the next location. Finally, gas is introduced into the piston cylinder 2 again, causing the abutment plate 29 to descend again, so that the gas at the next location can be collected into the next adjacent gas chamber 7 in the same way.

[0048] After the collection is completed, simply open the cover plate 51, loosen the locking bolts, then separate the installation pipe from the connecting pipe 19, separate the connecting pipe 21 from the gas supply pipe 24, and then separate the connecting pipe 32 from the exhaust pipe 23. Finally, lift the pressure plate 5 so that the positioning rod 18 can be removed from the positioning cylinder 46, and then the entire collection mechanism can be taken out of the installation cavity. Then, open the valves on the collection pipes on the corresponding gas chambers 7 to draw out the gas in the gas chambers 7. Conversely, when installing the collection mechanism, first fix the collection mechanism in the installation wall, and then close the cover plate 51.

[0049] Example 2

[0050] Combination Figure 1 , Figure 3-6 This embodiment, based on Embodiment 1, further improves upon the following: A clearing assembly for unblocking the insertion tube 9 is installed inside the transition box 8. The clearing assembly includes a gear ring 41 rotatably connected to the inner wall of the top of the transition box 8, a side plate 39 fixed to the bottom surface of the gear ring 41, a bottom plate 42 fixed to the bottom surface of the side plate 39, a telescopic column installed on the inner wall of the top of the transition box 8, and a connecting piece on the side plate 39 for driving the telescopic column to extend or retract. The inner wall of the transition box 8 is a cylindrical structure, with the side plate 39 abutting against the inner wall of the transition box 8. The inner wall of the bottom of the transition box 8 has a funnel-shaped structure, with the bottom plate 42 abutting against the inner wall of the bottom of the transition box 8. The insertion tube 9 is located at the center of the bottom of the transition box 8. The telescopic column includes a fixing... The cylinder 40 and the unblocking rod 45 are movably sleeved inside the fixed cylinder 40. The outer ring of the unblocking rod 45 is rectangular. The inner wall of the fixed cylinder 40 has the same shape as the outer shape of the unblocking rod 45 to prevent the unblocking rod 45 from rotating. One end of the unblocking rod 45 is connected to the inner wall of the fixed cylinder 40 by a spring. The other end of the unblocking rod 45 is tapered and extends to the outside of the fixed cylinder 40. A fixed sleeve 44 is fixedly sleeved on the outside of the unblocking rod 45. The top surface of the fixed sleeve 44 is an inclined slope. The unblocking rod 45 is coaxially arranged with the insertion tube 9. The connecting component includes a crossbar 43 fixed on the side plate 39 and a ball bearing installed on the bottom surface of the crossbar 43. The ball bearing abuts against the top surface of the fixed sleeve 44. A power component for driving the gear ring 41 to rotate is installed on the outer wall of the collection chamber 6.

[0051] The power assembly includes a bellows 36 mounted on the outer wall of the collection chamber 6, a transition pipe 37 fixed to the bottom of the bellows 36, an air outlet pipe 38 fixed to one side of the outer wall of the transition pipe 37, a ground connection pipe 34 fixed to the top of the bellows 36, and a rotating shaft 35 rotatably connected to the inner wall of the transition pipe 37 on the side away from the bellows 36. The bellows 36 is connected to the rotating shaft 35. One end of the rotating shaft 35 extends into the bellows 36 and is fitted with a fan 47, which faces the ground connection pipe 34. The other end of the rotating shaft 35 extends into the inner side of the transition chamber 8 and is fitted with a connecting gear. The connecting gear is located inside the gear ring 41 and meshes with the inner ring of the gear ring 41. The pressure plate 5 is fixed with... Connecting pipe 2 31 and connecting pipe 32, one end of connecting pipe 32 is detachably connected to the other end of air outlet pipe 38 via pipe clamp 2, one end of connecting pipe 2 31 is detachably connected to one end of connecting pipe 34 via pipe clamp 3, the other end of connecting pipe 2 31 is equipped with air supply pipe 24, the other end of connecting pipe 32 is equipped with exhaust pipe 23, the other ends of air supply pipe 24 and exhaust pipe 23 both extend to the outside of drill rod 1, air supply pipe 24 is connected to an external air compressor, so that high-speed gas can be input into the air box 36 to drive the fan 47 to rotate, thereby generating power to drive the rotating shaft 35 to rotate.

[0052] The implementation principle of this embodiment is as follows: while removing the residual gas, slag, mud and water in the fixed pipe 14 and the transition box 8, a high-speed airflow is introduced into the second air supply pipe 24 through an air compressor. When the airflow enters the air box 36 through the abutment pipe 34, it drives the fan 47 to rotate, thereby causing the rotating shaft 35 to rotate under the drive of the fan 47. After the rotating shaft 35 rotates, it drives the gear ring 41 to rotate through the connecting gear. After the gear ring 41 rotates, the side plate 39, the bottom plate 42 and the crossbar 43 follow it synchronously. The rotating mechanism uses the side plate 39 to scrape off the mud adhering to the side wall of the transition box 8, while the bottom plate 42 can scrape off the mud on the inner wall of the bottom of the transition box 8. The rotating mechanism 43 causes the ball bearings to rotate on the top surface of the fixed sleeve 44, thereby pressing down the unblocking rod 45 according to the different inclination of the top surface of the fixed sleeve 44, so that it enters the insertion tube 9, thereby unblocking the mud or slag in the insertion tube 9. Then, it can rebound under the action of the second spring, and so on, to achieve the function of unblocking the insertion tube 9.

[0053] The above embodiments are merely preferred embodiments of the present invention and should not be construed as limiting the scope of protection of the present invention. Any non-substantial changes and substitutions made by those skilled in the art based on the present invention shall fall within the scope of protection claimed by the present invention.

Claims

1. A gas-while-drilling acquisition device, comprising a drill pipe, characterized in that, The drill rod has an internal mounting cavity. A feed pipe located below the positioning plate is fixed on one inner wall of the drill rod. A feed port communicating with the feed pipe is opened on the outer wall of the drill rod. A detachable collection mechanism is installed in the mounting cavity. The collection mechanism includes a collection chamber, a transition box fixed to the bottom of the collection chamber, a fixed pipe fixed to the top of the transition box, and an insertion pipe fixed to the bottom of the transition box. An installation pipe is installed at the other end of the fixed pipe, and a one-way valve is installed on the installation pipe. The collection chamber is composed of multiple gas chambers fixed together in a vertical direction. Multiple gas chambers are connected to the fixed pipe through branch pipes. A gate valve is installed on the branch pipe. A collection pipe is also installed on the side of the gas chamber where the branch pipe is installed. A linkage component for driving the gate valve to open and close is installed on the outer wall of the gas chamber. A piston plate is installed inside each of the multiple gas chambers. An air extraction component for driving the piston plate to move away from the branch pipe is installed on the outer wall of the gas chamber. Through the setting of the transition box, the slag and mud mixed with the gas can be temporarily retained in the transition box when it enters the transition box, while the gas can enter different gas chambers through the fixed pipe and the branch pipe. One end of the insertion tube is detachably connected to one end of the feed tube. A fixing component for fixing the collection chamber is installed in the mounting cavity. The fixing component includes a pressure plate and a locking element for locking the pressure plate. A connecting pipe is fixed on the pressure plate, and one end of the connecting pipe is detachably connected to the other end of the mounting tube. A gas supply pipe is fixed to the other end of the connecting pipe, and the other end of the gas supply pipe extends to the outside of the drill rod and is connected to external gas to purge the residual gas in the fixing tube and the transition box. A transmission unit for driving the air extraction component and the linkage component is also installed on the pressure plate. Through the cooperation between the linkage component, the air extraction component and the transmission unit, gas at different locations can be drawn into different gas chambers. The linkage component is connected to the valve stem of the gate valve. Before the piston plate moves, the linkage component drives the valve stem to rotate forward to open the gate valve. After the air extraction component finishes its single air intake, the linkage component automatically drives the valve stem to rotate in reverse to close the gate valve.

2. The gas-while-drilling acquisition device according to claim 1, characterized in that, A through hole is provided on the outer wall of the gas chamber on the side away from the branch pipe. The air extraction assembly includes an installation shaft installed on the outer wall of the gas chamber on the side with the through hole, a transmission gear and a rope wheel sleeved outside the installation shaft. A connecting rope is fixed in the rope groove of the rope wheel, and the other end of the connecting rope passes through the through hole and extends into the gas chamber and is fixed to the outer wall of the piston plate.

3. The gas-while-drilling acquisition device according to claim 2, characterized in that, The transmission unit includes a fixed rod movably mounted on the pressure plate, an abutment plate fixed to the bottom of the fixed rod, and a transmission rack fixed to the outer wall of one side of the abutment plate for driving the transmission gear to rotate. The fixed rod is located on the side of the pressure plate away from the collection chamber, and a driving component for driving the fixed rod to move is installed in the mounting cavity.

4. A gas-while-drilling acquisition device according to claim 3, characterized in that, The driving component includes a piston cylinder with an opening at one end fixed in the mounting cavity, a piston plate II installed in the piston cylinder, and a piston rod fixed on the outer wall of the piston plate II near the opening. The other end of the piston rod extends to the outside of the piston cylinder and is fixed to a fixing block. The end of the fixing rod away from the abutment plate is fixed to the bottom surface of the fixing block. The end of the piston cylinder away from the opening is equipped with a pressure pipe communicating with it, and the other end of the pressure pipe extends to the outside of the drill rod.

5. A gas-while-drilling acquisition device according to claim 4, characterized in that, One end of the valve stem of the gate valve extends to the outside of the gate valve and is equipped with a fixed gear. The linkage assembly includes a transmission rod movably mounted on the outer wall of the gas chamber, a linkage rack fixed to one end of the transmission rod, a limiting plate movably sleeved on the outside of the transmission rod, and a spring. The linkage rack meshes with the fixed gear. One end of the limiting plate is fixed to the outer wall of the gas chamber. A spring catch is sleeved on the outside of the transmission rod. The spring is located between the spring catch and the limiting plate, and one end of the spring is fixed to the limiting plate, while the other end of the spring is fixed to the spring catch. The bottom of the abutment plate has a right-angled triangular structure, and the inclined surface of the right-angled triangle faces the gas chamber. The abutment plate cooperates with the transmission rod to drive it to move away from the abutment plate after abutting with the transmission rod.

6. The gas-while-drilling acquisition device according to claim 1, characterized in that, The transition box is equipped with a clearing assembly for unblocking the insertion tube. The assembly includes a gear ring rotatably connected to the inner wall of the top of the transition box, a side plate fixed to the bottom surface of the gear ring, a bottom plate fixed to the bottom surface of the side plate, a telescopic column mounted on the inner wall of the top of the transition box, and a connecting piece mounted on the side plate for driving the telescopic column to extend and retract. The inner wall of the transition box is cylindrical, with the side plate abutting against the inner wall of the transition box, and the bottom plate abutting against the inner wall of the bottom of the transition box. The telescopic column includes a fixed... A fixed cylinder and a movable unblocking rod are fitted inside the fixed cylinder. One end of the unblocking rod is connected to the inner wall of the fixed cylinder by a spring. The other end of the unblocking rod has a tapered structure and extends outside the fixed cylinder. A fixed sleeve is fixedly fitted to the outside of the unblocking rod. The top surface of the fixed sleeve is an inclined surface. The unblocking rod and the insertion tube are coaxially arranged. The connecting component includes a crossbar fixed to the side plate and a ball bearing installed on the bottom surface of the crossbar. The ball bearing abuts against the top surface of the fixed sleeve. A power component for driving the gear ring to rotate is installed on the outer wall of the collection chamber.

7. A gas-while-drilling acquisition device according to claim 6, characterized in that, The power assembly includes a bellows mounted on the outer wall of the collection chamber, a transition pipe fixed to the bottom of the bellows, an air outlet pipe fixed to one side of the outer wall of the transition pipe, a ground connection pipe fixed to the top of the bellows, and a rotating shaft rotatably connected to the inner wall of the transition pipe on the side away from the bellows. The bellows and the rotating shaft are connected. One end of the rotating shaft extends into the bellows and is equipped with a fan, which faces the ground connection pipe. The other end of the rotating shaft extends into the inner side of the transition chamber and is equipped with a connecting gear. The connecting gear is located inside the gear ring and meshes with the inner ring of the gear ring. Connecting pipe two and connecting pipe three are fixed on the pressure plate. One end of connecting pipe three is detachably connected to the other end of the air outlet pipe. One end of connecting pipe two is detachably connected to one end of the ground connection pipe. The other end of connecting pipe two is equipped with an air supply pipe two, and the other end of connecting pipe three is equipped with an exhaust pipe. The other ends of air supply pipe two and exhaust pipe both extend to the outside of the drill pipe.

8. A gas-while-drilling acquisition device according to claim 1, characterized in that, Positioning plates are fixed on the inner walls of the two opposite sides of the mounting cavity. The transition box is placed on top of the two positioning plates. Multiple positioning rods are fixed on the bottom surface of the pressure plate. Multiple positioning cylinders that match the positioning rods are fixed on the top of the collection chamber.

9. A gas-while-drilling acquisition device according to claim 8, characterized in that, The locking component includes a movable rod fixed to the top surface of the pressure plate and a fixed plate movably sleeved outside the movable rod. One end of the fixed plate is fixedly connected to the inner wall of the mounting cavity, and a locking bolt is threaded onto the outer wall of the fixed plate. One end of the locking bolt abuts against the outer wall of the movable rod.

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