A shock-type hollow core drill tool

Abstract

The present invention discloses a shock-type hollow coring screw drill, which includes an outer assembly and a coring drill bit set in the wireline coring channel of the outer assembly; the outer assembly includes a coring bit, a flow dividing joint, a shock-type hollow screw motor, and a centralizer joint; the upper end of the centralizer joint is assembled with the drill pipe, and the lower end of the centralizer joint is connected to the shock-type hollow screw motor. The shock-type hollow screw motor is of a hollow structure. The lower end of the transmission shaft of the shock-type hollow screw motor is connected to the upper end of the flow dividing joint, and the lower end of the flow dividing joint is connected to the coring bit. The coring bit is of a hollow structure; during the drilling and coring process of the shock-type hollow coring screw drill in the present invention, the shock-type hollow screw motor can provide a high rotational speed for the downhole bit, increasing the coring footage speed. By adopting a hollow screw structure, a wireline coring drill can be installed in the internal space. After each core is drilled, it can be salvaged by a winch without lifting out all the drill tools, saving coring time.

Description

Technical Field

[0001] The present invention relates to the technical field of drilling and coring, and in particular to a shock-type hollow coring screw drill Background Art

[0002] At present, wireline coring drilling is a geological exploration drilling construction method in which the inner assembly of the drill is put into a special wireline drill pipe. After the coring drilling is completed, a wireline fishing tool is used to fish the inner assembly out of the surface to obtain the core. Since the core-taking process does not require the hundreds or thousands of meters of drill pipe in the hole to be lifted out of the surface, the work efficiency is greatly improved.

[0003] The outer assembly of the drill used in the conventional wireline coring drilling method consists of an outer pipe and a wireline drill pipe connected above. The inner assembly includes an inner pipe, a collet, and a single-action suspension assembly, and the drill pipe and the drill bit are rotated by the surface rotary power to break the rock. With the development of drilling and coring, various complex coring environments will be encountered. For example, when coring in deep-sea drilling, because hard rocks will be encountered on the seabed, a high rotational speed is required to accelerate the penetration rate. However, seawater has no supporting ability. To prevent the drill pipe from twisting, the rotary power head of the drilling rig on the drilling ship cannot provide a high rotational speed, or due to the limitation of the power head's ability, a relatively high rotational speed cannot be provided. At this time, the use of downhole motor drills is very important. The screw motor shock-type hollow screw motor drill can provide a relatively high rotational speed. However, the conventional screw motor is generally of a solid structure. A coring drill and a drill pipe are installed below the screw motor. After each core-taking cycle, all the drills need to be lifted out of the well bottom. When the well depth is relatively large, because there are many drills, each tripping operation wastes time and the cost is relatively high.

[0004] In summary, the existing wireline coring drills have the following technical defects:

[0005] 1. In marine drilling coring, due to the lack of wellbore support, too high a rotational speed cannot be applied, resulting in low hard rock coring efficiency;

[0006] 2. The conventional downhole motor drill is of a solid structure and cannot use wireline coring, resulting in the need to lift all the drills out each time of coring, wasting time and resulting in high construction costs. Summary of the Invention

[0007] The purpose of the present invention is to provide a shock-type hollow coring screw drill to solve the above problems existing in the prior art, which can increase the rotational speed of the drill bit at the bottom of the well, increase the coring penetration rate, and does not require all the drills to be taken out when fishing for the coring drill.

[0008] To achieve the above object, the present invention provides the following solution:

[0009] The present invention provides a shock-type hollow coring screw drill, including an outer assembly and a coring drill set in the wireline coring channel of the outer assembly;

[0010] The outer assembly includes a core bit, a diverter sub, a shock type hollow positive displacement motor, and a centralizer sub; the upper end of the centralizer sub is assembled with a drill pipe, the lower end of the centralizer sub is connected to the shock type hollow positive displacement motor, the shock type hollow positive displacement motor is of a hollow structure, the lower end of the transmission shaft of the shock type hollow positive displacement motor is connected to the upper end of the diverter sub, the lower end of the diverter sub is connected to the core bit, and the core bit is of a hollow structure;

[0011] The shock type hollow positive displacement motor includes the transmission shaft, a shock moving sleeve, a shock static sleeve, a lower TC bearing, a thrust bearing, an upper TC bearing, a drill string outer pipe, a flow-through inner sub, a sealing and fixing inner sub, a hollow universal joint, a transition sub, a rotor, and a stator; the shock moving sleeve is sleeved outside the transmission shaft and can rotate together with the transmission shaft, the shock static sleeve is sleeved outside the transmission shaft at the upper end of the shock moving sleeve, the upper end of the shock static sleeve is connected to the lower end of the drill string outer pipe through the lower TC bearing, the thrust bearing and the upper TC bearing are installed in the annulus between the transmission shaft and the drill string outer pipe, and the thrust bearing is arranged at the lower end of the upper TC bearing, the lower end of the flow-through inner sub is connected to the upper end of the transmission shaft, the upper end of the flow-through inner sub is connected to the sealing and fixing inner sub, the upper end of the sealing and fixing inner sub is connected to the rotor through the hollow universal joint, the stator is outside the rotor, the lower end of the stator is connected to the drill string outer pipe through the transition sub, and the upper end of the stator is connected to the centralizer sub.

[0012] Preferably, the core drill string includes a fishing head, a positioning clamp, a core barrel single-rotation mechanism, a downhole environment and working condition monitoring and storage module, and a core barrel, which are connected in sequence from the upper part to the lower part; after coring the target length of core, a fishing tool can be lowered, the upper end of the fishing tool is connected to the upper end of the fishing head, and the core drill string is lifted out of the wellhead. The positioning clamp is engaged in the torque transmission positioning groove of the shock type hollow positive displacement motor to fix the position of the core drill string. The core barrel single-rotation mechanism is internally equipped with bearings, which can ensure that the lower drill string does not rotate when the positioning clamp rotates, reduce coring disturbance, and improve the core recovery rate.

[0013] Preferably, the positioning clamp includes a body and a clamping jaw hinged to the body, the upper end of the body is connected to the fishing head, and the lower end of the body is connected to the core barrel single-rotation mechanism.

[0014] Preferably, the core barrel single-rotation mechanism includes an upper connecting pipe, a lower connecting pipe, and a connecting shaft. The upper end of the upper connecting pipe is connected to the body of the positioning clamp, the lower end of the upper connecting pipe is connected to the upper end of the connecting shaft, the lower end of the connecting shaft is connected to the lower connecting pipe through a bearing, and the lower end of the lower connecting pipe is connected to the downhole environment and working condition monitoring and storage module.

[0015] Preferably, the downhole environment and working condition monitoring and storage module is internally equipped with a power supply and sensors for detecting the downhole temperature and pressure during the coring process.

[0016] Preferably, the body of the flow splitter joint has a hollow flow channel inside, and a number of flow splitting inclined holes are circumferentially distributed on the outer wall of the body. The flow splitting inclined holes are longitudinally inclined. The upper end of each flow splitting inclined hole communicates with the outside of the body, and the lower end of each flow splitting inclined hole communicates with a flow splitting transverse hole. The flow splitting transverse hole is radially arranged. The outer end of the flow splitting transverse hole communicates with the outside of the body, and the inner end of the flow splitting transverse hole communicates with the hollow flow channel of the body. A long plug or a short plug is arranged in the flow splitting transverse hole. When the long plug is arranged, the flow splitting inclined hole is blocked. When the short plug is arranged, the hollow flow channel of the body communicates with the flow splitting inclined hole through the flow splitting transverse hole.

[0017] Preferably, there is a slurry passing gap between the rotor, the hollow universal joint, the sealed fixed inner joint and the flow-through inner joint and the drill pipe outer tube, the transition joint and the stator. The coring drill is arranged in the cavity formed by the transmission shaft, the flow-through inner joint and the sealed fixed inner joint. A screw hole inner seal is arranged between the upper section of the coring tube single-acting mechanism and the sealed fixed inner joint. The flow-through inner joint is provided with a flow-through hole, and the flow-through hole communicates the slurry passing gap with the slurry passing channel in the transmission shaft.

[0018] Preferably, the shock moving sleeve and the shock static sleeve are in contact through a spiral boss. The upper end surface of the first boss of the shock moving sleeve can fit with the lower end surface of the second boss of the shock static sleeve to achieve seamless connection. The thickness of the first boss gradually decreases along the counterclockwise direction, and the thickness of the second boss gradually increases along the counterclockwise direction. When the shock moving sleeve rotates counterclockwise, the position with the largest thickness of the first boss turns to the position with the largest thickness of the second boss, so that the shock static sleeve is gradually lifted. When the first boss rotates to the initial position and fits with the second boss, the shock static sleeve falls back to its original position and impacts the transmission shaft to achieve the shock effect.

[0019] Preferably, the flow-through inner joint and the sealed fixed inner joint are connected by spline fit.

[0020] Preferably, the hollow universal joint includes a ball joint and connecting heads symmetrically arranged at both ends of the ball joint. The outer ends of the two connecting heads are respectively threadedly connected to the sealed fixed inner joint and the rotor. The inner ends of the two connecting heads are spherical cavities, and the two ends of the ball joint are ball heads. The ball heads at both ends of the ball joint are respectively arranged in the spherical cavities of the two connecting heads. The ball heads are connected to the key grooves on the spherical cavities through keys. A seal is also achieved between the ball head and the spherical cavity through vulcanized rubber. A gland is sleeved on the ball joint inside the ball head, and the gland is connected to the connecting head through bolts.

[0021] The present invention has achieved the following beneficial technical effects compared with the prior art:

[0022] 1. During the coring process, the shock-type hollow screw motor can provide a high rotational speed for the bottom-hole bit, increasing the coring footage speed.

[0023] 2. By adopting a hollow screw structure, a coring tool can be installed in the internal space. After each core is drilled, it can be salvaged by a winch without having to remove all the drilling tools, saving coring time.

[0024] 3. Instead of using an integral universal joint which is prone to fatigue failure, the hollow universal joint in this embodiment adopts a spherical hinge, which can reduce fatigue failure and improve the service life of the drilling tool.

[0025] 4. The flow-dividing joint changes the bottom-hole mud flow rate by changing the number of flow-dividing holes, enabling the drilling tool to adapt to formations under different conditions, improving the adaptability of the drilling tool and the coring efficiency.

[0026] 5. During the shock process, when the outer pipe and the inner rotor of the drilling tool move upward, they drive the coring pipe upward, causing the coring tool to move axially and preventing the rock from blocking the coring pipe during the acquisition process. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required to be used in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0028] Figure 1 It is a schematic structural diagram of the shock-type hollow coring screw drill in the present invention;

[0029] Figure 2 It is a schematic structural diagram of the shock-type hollow screw motor in the present invention;

[0030] Figure 3 is Figure 2Enlarged view at the middle transmission shaft;

[0031] Figure 4 is Figure 2 Cross-sectional view at A-A in the middle;

[0032] Figure 5 Structural schematic diagram of the core barrel in the present invention;

[0033] Figure 6 Structural schematic diagram of the flow dividing joint in the present invention;

[0034] Figure 7 Assembly drawing of the shock moving sleeve and the shock static sleeve in the present invention;

[0035] Figure 8 Structural schematic diagram of the hollow universal joint in the present invention; <s

[0036] Figure 9 Structural schematic diagram of the seal inside the screw hole provided between the core barrel single-acting mechanism and the sealed fixed inner joint in the present invention;

[0037] In the figure: 1-core bit, 2-flow dividing joint, 201-body, 202-long plug, 203-short plug, 204-flow dividing inclined hole, 205-flow dividing transverse hole, 3-core barrel, 301-fishing head, 302-positioning card, 303-core barrel single-acting mechanism, 304-downhole environment and working condition monitoring and storage module, 305-core barrel, 4-shock type hollow screw motor, 401-transmission shaft, 402-shock moving sleeve, 403-shock static sleeve, 404-lower TC bearing, 405-thrust bearing, 406-upper TC bearing, 407-drill pipe outer tube, 408-overflow inner joint, 409-sealed fixed inner joint, 410-hollow universal joint, 411-transition joint, 412-stator, 413-rotor, 414-overflow hole, 415-boss one, 416-boss two, 417-ball joint, 418-connector, 419-vulcanized rubber, 420-gland, 5-centering joint. Specific embodiments

[0038] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0039] The purpose of the present invention is to provide a shock type hollow core barrel screw drill to solve the problems existing in the prior art.

[0040] To make the above objects, features, and advantages of the present invention more obvious and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0041] The shock-type hollow core barrel drill tool in this embodiment, as Figure 1 shown, includes an outer assembly and a core barrel drill tool 3 sleeved in the wireline coring channel of the outer assembly;

[0042] The outer assembly includes a core bit 1, a diverter sub 2, a shock-type hollow screw motor 4, and a centralizer sub 5; the upper end of the centralizer sub 5 is assembled with the drill pipe, the lower end of the centralizer sub 5 is connected to the shock-type hollow screw motor 4, the shock-type hollow screw motor 4 is of a hollow structure, the lower end of the transmission shaft 401 of the shock-type hollow screw motor 4 is connected to the upper end of the diverter sub 2, the lower end of the diverter sub 2 is connected to the core bit 1, and the core bit 1 is of a hollow structure;

[0043] As Figure 2 、 Figure 3 shown, the shock-type hollow screw motor 4 includes a transmission shaft 401, a shock moving sleeve 402, a shock static sleeve 403, a lower TC bearing 404, a thrust bearing 405, an upper TC bearing 406, a drill tool outer pipe 407, a flow-through inner joint 408, a sealed fixed inner joint 409, a hollow universal joint 410, a transition joint 411, a stator 412, and a rotor 413; the shock moving sleeve 402 is sleeved outside the transmission shaft 401 and is connected to the transmission shaft 401 by a thread, and can rotate with the transmission shaft 401. The shock static sleeve 403 is sleeved outside the transmission shaft 401 at the upper end of the shock moving sleeve 402. The upper end of the shock static sleeve 403 is connected to the lower end of the drill tool outer pipe 407 through the lower TC bearing 404. The lower TC bearing 404 is connected to the shock static sleeve 403 and the drill tool outer pipe 407 by a thread. The displaceable thrust bearing 405 and the upper TC bearing 406 are installed in the annulus between the transmission shaft 401 and the drill tool outer pipe 4, and the thrust bearing 405 is arranged at the lower end of the upper TC bearing 406. The lower end of the flow-through inner joint 408 is threadedly connected to the upper end of the transmission shaft 401, the upper end of the flow-through inner joint 408 is connected to the sealed fixed inner joint 409 by spline fit, the upper end of the sealed fixed inner joint 409 is connected to the rotor 413 through the hollow universal joint 410. The stator 412 is outside the rotor 413. The lower end of the stator 412 is threadedly connected to the transition joint 411, the lower end of the transition joint 411 is threadedly connected to the drill tool outer pipe 407, and the upper end of the stator 412 is threadedly connected to the centralizer sub 5.

[0044] As Figure 5As shown in the figure, the core barrel 3 includes a fishing head 301, a positioning clamp 302, a core barrel single-acting mechanism 303, a downhole environment and working condition monitoring and storage module 304, and a core barrel 305, which are connected in sequence from the upper part to the lower part. After the core of the target length is taken, a fishing tool can be lowered. The upper end of the fishing tool is connected to the upper end of the fishing head 301 to lift the core barrel 3 out of the wellhead. The positioning clamp 302 is clamped into the torque transmission positioning groove of the shock-type hollow screw motor 4 to fix the position of the core barrel. There is a bearing inside the core barrel single-acting mechanism 303. When the positioning clamp 302 rotates, it can ensure that the lower drill string does not rotate, reduce the core-taking disturbance, and improve the core-taking rate. The positioning clamp 302 includes a body 201 and a claw hinged to the body 201. The upper end of the body 201 is connected to the fishing head 301, and the lower end of the body 201 is connected to the core barrel single-acting mechanism 303. The core barrel single-acting mechanism 303 includes an upper connecting pipe, a lower connecting pipe, and a connecting shaft. The upper end of the upper connecting pipe is connected to the body 201 of the positioning clamp 302, the lower end of the upper connecting pipe is connected to the upper end of the connecting shaft, the lower end of the connecting shaft is connected to the lower connecting pipe through a bearing, and the lower end of the lower connecting pipe is connected to the downhole environment and working condition monitoring and storage module 304. The downhole environment and working condition monitoring and storage module 304 is equipped with a built-in power supply and sensors to detect parameters such as the temperature and pressure downhole during the core-taking process.

[0045] In this embodiment, as Figure 4 shown, the upper spline of the overcurrent inner joint 408 is in mating connection with the sealed fixed inner joint 409, which can transmit torque and move axially at the same time. The principle of vibrating the core barrel 305 is that the positioning clamp 302 is clamped into the torque transmission positioning groove of the sealed fixed inner joint 409 of the shock-type hollow screw motor 4, which can fix the position of the core barrel 3 during the shock process. When the outer pipe 407 and the rotor 413 of the drill string move upward, they can drive the core barrel 305 to move upward, realizing the axial movement of the core barrel.

[0046] As Figure 6As shown in the figure, the inside of the body 201 of the flow splitter joint 2 has a hollow flow channel. A number of flow splitting inclined holes 204 are circumferentially distributed on the outer wall of the body 201. The flow splitting inclined holes 204 are longitudinally inclined. The upper end of each flow splitting inclined hole 204 communicates with the outside of the body 201, and the lower end of each flow splitting inclined hole 204 communicates with a flow splitting transverse hole 205. The flow splitting transverse hole 205 is radially arranged. The outer end of the flow splitting transverse hole 205 communicates with the outside of the body 201, and the inner end of the flow splitting transverse hole 205 communicates with the hollow flow channel of the body 201. A long plug 202 or a short plug 203 is arranged in the flow splitting transverse hole 205. When the long plug 202 is arranged, the flow splitting inclined holes 204 are blocked. When the short plug 203 is arranged, the hollow flow channel of the body 201 communicates with the flow splitting inclined holes 204 through the flow splitting transverse hole 205. During the hard rock core drilling process, long plugs 202 are installed in all the flow splitting transverse holes 205, and all the mud flows through the annulus between the flow splitter joint 2 and the core drill 3, cleaning the bottom hole cuttings, improving the bottom hole cleanliness, and improving the hard rock core drilling efficiency. During the soft rock core drilling process, short plugs 203 are installed in all the flow splitting transverse holes 205. At this time, the flow splitting inclined holes 204 communicate with the hollow flow channel of the flow splitter joint 2. Part of the mud flows through the annulus between the flow splitter joint 2 and the core drill 3, and part flows out through the flow splitting inclined holes 204, reducing the mud pressure at the drill bit, reducing the disturbance of the bottom mud to the soft rock core, and improving the soft rock core drilling efficiency.

[0047] In this specific embodiment, there is a slurry passing gap between the rotor 413, the hollow universal joint 410, the sealed fixed inner joint 409 and the flow-through inner joint 408 and the drill pipe outer tube 407, the transition joint 411 and the stator 412. The core drill 3 is arranged in the cavity formed by the drive shaft 401, the flow-through inner joint 408 and the sealed fixed inner joint 409. A screw hole inner seal is arranged between the upper section of the core barrel single-action mechanism 303 and the sealed fixed inner joint 409 (as Figure 9 shown). A flow-through hole 414 is arranged on the flow-through inner joint 408. The flow-through hole 414 connects the slurry passing gap with the slurry passing channel in the drive shaft 401.

[0048] As Figure 7 shown, the shock moving sleeve 402 and the shock static sleeve 403 are in contact through a spiral boss. The upper end surface of the boss one 415 of the shock moving sleeve 402 can fit with the lower end surface of the boss two 416 of the shock static sleeve 403 to achieve seamless connection. The thickness of the boss one 415 gradually decreases along the counterclockwise direction, and the thickness of the boss two 416 gradually increases along the counterclockwise direction. When the shock moving sleeve 402 rotates counterclockwise, the position with the largest thickness of the boss one 415 turns to the position with the largest thickness of the boss two 416, realizing that the shock static sleeve 403 is gradually lifted. When the boss one 415 rotates to the initial position and fits with the boss two 416, the shock static sleeve 403 falls back to its original position, impacting the drive shaft 401 to achieve the shock effect.

[0049] As Figure 8As shown, the hollow universal joint 410 includes a ball joint 417 and connectors 418 symmetrically arranged at both ends of the ball joint 417. The outer ends of the two connectors 418 are respectively threadedly connected to the sealed fixed inner joint 409 and the rotor 413. The inner ends of the two connectors 418 are spherical cavities, and the two ends of the ball joint 417 are ball heads. The ball heads at both ends of the ball joint 417 are respectively arranged in the spherical cavities of the two connectors 418. The ball heads are connected to the key grooves on the spherical cavities through keys. Sealing between the ball heads and the spherical cavities is also achieved through vulcanized rubber 419. A gland 420 is sleeved on the ball joint 417 inside the ball head. The gland 420 is connected to the connector 418 through bolts. The function of the gland 420 is to prevent the ball head from disengaging from the spherical cavity.

[0050] In this embodiment:

[0051] 1) During the coring process, the shock-type hollow screw 4 motor can provide a high rotational speed for the downhole bit, increasing the coring footage speed.

[0052] 2) By adopting a hollow screw structure, a coring tool 3 can be installed in the internal space. After each core is drilled, it can be salvaged using a winch without having to remove all the drilling tools, saving coring time.

[0053] 3) Instead of using an integral universal joint which is prone to fatigue failure, the hollow universal joint in this embodiment uses a spherical hinge, which can reduce fatigue failure and improve the service life of the drilling tool;

[0054] 4) The design of the shock moving sleeve 402 and the shock static sleeve 403 can generate a shock effect during drilling, improving the coring efficiency;

[0055] 5) By changing the number of flow splitting holes in the flow splitting joint 2, the downhole mud flow rate is changed, enabling the drilling tool to adapt to different formations, improving the adaptability of the drilling tool and the coring efficiency;

[0056] 6) The coring tool 3 and the shock-type hollow screw motor 4 are connected through a positioning card and a torque transmission positioning groove, causing the coring tube 305 to also move axially during shock, preventing the core tube 305 from being blocked by rocks during the acquisition process.

[0057] The present invention elaborates on the principle and implementation manner of the present invention using specific examples. The description of the above embodiments is only used to help understand the method and its core idea of the present invention; at the same time, for those of ordinary skill in the art, based on the idea of the present invention, there will be changes in the specific implementation manner and application scope. In summary, the content of this specification should not be construed as a limitation to the present invention.

Claims

1. A shock-type hollow core drill tool for screw drill, characterized in that: It includes an outer assembly and a core barrel placed in the wireline coring channel of the outer assembly; The outer assembly includes a core bit, a diverter sub, a shock type hollow screw motor, and a centralizer sub; the upper end of the centralizer sub is assembled with a drill pipe, the lower end of the centralizer sub is connected to the shock type hollow screw motor, the shock type hollow screw motor is of a hollow structure, the lower end of the transmission shaft of the shock type hollow screw motor is connected to the upper end of the diverter sub, the lower end of the diverter sub is connected to the core bit, and the core bit is of a hollow structure; The shock type hollow screw motor includes the transmission shaft, a shock moving sleeve, a shock static sleeve, a lower TC bearing, a thrust bearing, an upper TC bearing, a drill string outer pipe, a flow-through inner sub, a sealing and fixing inner sub, a hollow universal joint, a transition sub, a rotor, and a stator; the shock moving sleeve is sleeved outside the transmission shaft and can rotate together with the transmission shaft, the shock static sleeve is sleeved outside the transmission shaft at the upper end of the shock moving sleeve, the upper end of the shock static sleeve is connected to the lower end of the drill string outer pipe through the lower TC bearing, the thrust bearing and the upper TC bearing are installed in the annulus between the transmission shaft and the drill string outer pipe, and the thrust bearing is arranged at the lower end of the upper TC bearing, the lower end of the flow-through inner sub is connected to the upper end of the transmission shaft, the upper end of the flow-through inner sub is connected to the sealing and fixing inner sub, the upper end of the sealing and fixing inner sub is connected to the rotor through the hollow universal joint, the stator is outside the rotor, the lower end of the stator is connected to the drill string outer pipe through the transition sub, and the upper end of the stator is connected to the centralizer sub; The core barrel includes a fishing head, a positioning clamp, a core barrel single-rotation mechanism, a downhole environment and working condition monitoring and storage module, and a core barrel, which are connected in sequence from the upper part to the lower part; after coring the target length of core, a fishing tool can be lowered, the upper end of the fishing tool is connected to the upper end of the fishing head, and the core barrel is lifted out of the wellhead. The positioning clamp is inserted into the torque transmission positioning groove of the shock type hollow screw motor to fix the position of the core barrel. There is a bearing inside the core barrel single-rotation mechanism to ensure that the lower drill string does not rotate when the positioning clamp rotates.

2. The jarring type hollow core drill tool according to claim 1, characterized in that: The positioning clamp includes a body and a clamping jaw hinged on the body. The upper end of the body is connected to the fishing head, and the lower end of the body is connected to the core barrel single-rotation mechanism.

3. The jarring type hollow core drill tool according to claim 2, characterized in that: The core barrel single-rotation mechanism includes an upper connecting pipe, a lower connecting pipe, and a connecting shaft. The upper end of the upper connecting pipe is connected to the body of the positioning clamp, the lower end of the upper connecting pipe is connected to the upper end of the connecting shaft, the lower end of the connecting shaft is connected to the lower connecting pipe through a bearing, and the lower end of the lower connecting pipe is connected to the downhole environment and working condition monitoring and storage module.

4. The jarring type hollow core drill tool according to claim 1, characterized in that: The downhole environment and working condition monitoring and storage module is internally equipped with a power supply and sensors for detecting the temperature and pressure downhole during the coring process.

5. The jarring type hollow core drill tool according to claim 1, characterized in that: The interior of the body of the flow splitting joint is provided with a hollow flow channel. A number of flow splitting inclined holes are circumferentially distributed on the outer wall of the body. The flow splitting inclined holes are longitudinally inclined. The upper end of each flow splitting inclined hole communicates with the outside of the body. The lower end of each flow splitting inclined hole communicates with a flow splitting transverse hole. The flow splitting transverse hole is radially arranged. The outer end of the flow splitting transverse hole communicates with the outside of the body. The inner end of the flow splitting transverse hole communicates with the hollow flow channel of the body. A long plug or a short plug is arranged in the flow splitting transverse hole. When the long plug is arranged, the flow splitting inclined hole is blocked. When the short plug is arranged, the hollow flow channel of the body communicates with the flow splitting inclined hole through the flow splitting transverse hole.

6. The jarring type hollow core drill tool according to claim 1, characterized in that: There is a slurry passing gap between the rotor, the hollow universal joint, the sealed fixed inner joint and the flow-through inner joint and the drill pipe outer tube, the transition joint and the stator. The core drill is arranged in the cavity formed by the transmission shaft, the flow-through inner joint and the sealed fixed inner joint. There is a seal inside the screw hole between the upper section of the core barrel single-acting mechanism and the sealed fixed inner joint. The flow-through inner joint is provided with a flow-through hole, and the flow-through hole communicates the slurry passing gap with the slurry passing channel in the transmission shaft.

7. The jarring type hollow core drill tool according to claim 1, characterized in that: The shock moving sleeve and the shock static sleeve are in contact through a spiral boss. The upper end surface of the first boss of the shock moving sleeve can fit with the lower end surface of the second boss of the shock static sleeve to achieve seamless connection. The thickness of the first boss gradually decreases in the counterclockwise direction, and the thickness of the second boss gradually increases in the counterclockwise direction. When the shock moving sleeve rotates counterclockwise, the position with the maximum thickness of the first boss turns to the position with the maximum thickness of the second boss, realizing that the shock static sleeve is gradually lifted. When the first boss rotates to the initial position and fits with the second boss, the shock static sleeve falls back to its original position and impacts the transmission shaft to achieve the shock effect.

8. The jarring type hollow core drill tool according to claim 1, characterized in that: The flow-through inner joint and the sealed fixed inner joint are connected by spline fit.

9. The jarring type hollow core drill pipe tool according to claim 1, wherein: The hollow universal joint includes a ball joint and connecting heads symmetrically arranged at both ends of the ball joint. The outer ends of the two connecting heads are respectively threadedly connected to the sealed fixed inner joint and the rotor. The inner ends of the two connecting heads are spherical cavities. The two ends of the ball joint are ball heads. The ball heads at both ends of the ball joint are respectively arranged in the spherical cavities of the two connecting heads. The ball heads are connected with the key grooves on the spherical cavities through keys. A seal is also achieved between the ball heads and the spherical cavities through vulcanized rubber. A gland is sleeved on the ball joint inside the ball head, and the gland is connected to the connecting head through bolts.

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