Flushing fluid dynamic pushing rotary directional deflecting continuous wire line coring drilling tool and flushing fluid dynamic pushing rotary directional deflecting continuous wire line coring method

Abstract

The invention discloses a flushing fluid dynamic pushing rotary directional deflecting continuous wire line coring drilling tool and method. The flushing fluid dynamic pushing rotary directional deflecting continuous wire line coring drilling tool comprises a rotary directional deflecting drilling tool body and a continuous coring drilling tool body in the rotary directional deflecting drilling tool body. The rotary directional deflecting drilling tool comprises a coring drill bit, a dynamic sidewall contact whipstock, a positioning short section and a coring drill rod which are connected in sequence; the continuous coring drilling tool comprises a coring pipe, a measurement and control flow guide short section, a positioning fishing mechanism and a rope fishing device which are connected in sequence. Dynamic pushing rotary directional deflecting and continuous rope coring are combined, high-pressure flushing fluid provided by a slurry pump is used as a driving power source, deflecting direction control is achieved by dynamically controlling a flushing fluid flow channel, efficient rock core extraction is achieved through rope fishing, rock samples can be continuously taken while the drilling track is accurately controlled, and the drilling efficiency is improved. The rock core sampling rate and sampling precision of geological drilling exploration are improved, and technical equipment guarantee is provided for mineral resource evaluation, underground engineering investigation, geological disaster prevention and control and the like.

Description

Technical Field

[0001] The invention belongs to the technical field of geological exploration, and relates to a flushing fluid dynamic pushing, rotary directional deflecting, continuous rope coring drill tool and method. Background Art

[0002] Core drilling is an important technical means of geological exploration, including resource assessment, engineering survey, and detection and verification of geological anomalies. The rock core sampling rate and the accuracy of the core sampling position are important factors in evaluating the effectiveness of geological drilling.

[0003] Coring drilling is a drilling method and process aimed at obtaining cylindrical rock cores. Processes such as rope coring and reverse circulation coring enable continuous rock core collection without lifting the drill, with high sampling efficiency. However, it is impossible to measure and control the drilling trajectory while drilling, resulting in easy deviation from the target area and a low effective core collection rate.

[0004] In recent years, to balance the need for rock sampling and trajectory control, geological drilling has been carried out by alternating coring and directional drilling. When the actual drilling trajectory deviates slightly from the designed trajectory, coring is used to sample rock and mineral cores; when the actual drilling trajectory deviates from the designed trajectory, directional drilling is used to correct the deviation and return the borehole to the designed trajectory. This process has the following shortcomings:

[0005] (1) The directional drilling hole section cannot take rock cores, resulting in many invalid hole sections and a low overall core recovery rate of the drilling.

[0006] (2) The two processes use different drilling tools. The process switching requires drilling down and replacing the drilling tools, which is labor-intensive and has low overall efficiency.

[0007] (3) Directional drilling and core drilling have different requirements for drilling equipment such as drilling rigs, mud pumps, and drilling tools. A large amount of drilling materials need to be kept on hand at the construction site, resulting in high equipment costs.

[0008] (4) Correction is only performed when the drilling trajectory deviates from the designed trajectory, resulting in a delayed trajectory control and a need for improved accuracy.

[0009] (5) During directional drilling, a screw motor is used as a bottom hole deflection drill tool, and a sliding deflection method is used to correct the trajectory. The screw motor has low rock crushing power and a narrow range of applicable formations. It cannot be used in hard rocks. The sliding deflection trajectory has poor smoothness, which restricts the depth of the core drilling hole. Summary of the Invention

[0010] In view of the deficiencies in the prior art, the purpose of the present invention is to provide a continuous rope coring drill tool and method for dynamic pushing and rotating directional inclination of flushing fluid, so as to solve the problem that the coring drilling trajectory is difficult to monitor and control during drilling during geological drilling exploration.

[0011] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0012] A flushing fluid dynamic pushing and rotating directional deflecting continuous wireline coring drill tool, comprising a rotary directional deflecting drill tool and a continuous coring drill tool disposed therein; the rotary directional deflecting drill tool comprising a coring drill bit, a dynamic pushing and deflecting device, a positioning sub, and a coring drill rod connected in sequence; the continuous coring drill tool comprising a coring tube, a measurement and control diversion sub, and a positioning and salvaging mechanism connected in sequence, and a wireline salvaging device detachably connected to the positioning and salvaging mechanism;

[0013] After the continuous coring drill tool is positioned in the rotary directional deflecting drill tool, the measurement and control diversion short section can control the high-pressure flushing fluid to flow into a certain flow channel in the dynamic push-pull device, so that the pushing block of the pushing guide mechanism in the flow channel is radially pushed out and supported on the hole wall, so as to generate a deflecting force to control the deflecting direction; after the rope salvage device is docked with the positioning salvage mechanism, the continuous coring drill tool can be lifted out of the hole by pulling the rope salvage device outward to extract the core in the core tube, and the drilling trajectory data measured by the measurement and control diversion short section can be read, so that continuous coring can be carried out while the drilling trajectory is accurately controlled.

[0014] The present invention also includes the following technical features:

[0015] Specifically, the dynamic pushing and leaning device includes an outer leaning tube, the front outer wall of the outer leaning tube is provided with circumferentially evenly distributed grooves as pushing bins, and each pushing bin is provided with a radially contractible pushing guide mechanism; the rear inner wall of the outer leaning tube is provided with multiple circumferentially evenly distributed guide ports and a positioning inclined surface; the side wall of the outer leaning tube is provided with multiple flow channels, the flow channel connecting the guide port and the pushing bin is a guide flow channel, and the flow channel connecting the pushing bin and the front end of the outer leaning tube is a pressure relief flow channel.

[0016] Specifically, the pushing guide mechanism includes a reciprocating seat, a limit screw, a spring A and a pushing block; the limit screw is arranged along the radial direction of the deflecting outer tube, and the limit screw vertically penetrates the reciprocating seat and is screwed to the bottom of the pushing bin. The spring A is sleeved on the limit screw and the spring A is resting between the nut of the limit screw and the reciprocating seat; the pushing block is connected to the reciprocating seat and is close to the side wall of the pushing bin; when high-pressure liquid flows in the flow channel, it can radially push the reciprocating seat and compress the spring A to make the pushing block radially extend and support on the hole wall to generate a deflecting force.

[0017] Specifically, the measurement and control diversion sub includes a positioning flow distribution valve, a measurement and control outer pipe and a transition joint connected in sequence;

[0018] The front end of the measurement and control outer tube is closed and provided with a small hole, and the rear end is open and connected to the transition joint. A servo motor, a control module, a power supply module, and a measurement module are provided inside the outer tube. The measurement module can measure the rotation speed, vibration, and drilling trajectory of the rotary directional and deflecting drilling tool in real time. The servo motor drive shaft extends out of the small hole at the front end of the measurement and control outer tube.

[0019] The rear end of the positioning distribution valve is a blind hole, and a rotary distribution valve connected to the servo motor drive shaft is provided in the blind hole. The front outer wall of the positioning distribution valve is a sloped structure and can correspond to the positioning slope of the dynamic push-to-whip device. The side wall of the positioning distribution valve is provided with circumferentially uniformly distributed positioning distribution valve ports and can correspond one-to-one with the guide ports. The rotary distribution valve can connect the positioning distribution valve ports with the corresponding guide ports, thereby controlling the pushing block of the pushing guide mechanism to radially extend in a predetermined direction to generate a whipstocking force.

[0020] The transition joint is provided with an aviation plug, which is electrically connected to the control module.

[0021] Specifically, the outer surface of the positioning and distributing valve is a three-level step surface, the outer diameter of the first step surface at the rear end is the same as the outer diameter of the measurement and control outer tube, and the outer diameter of the measurement and control outer tube is smaller than the inner diameter of the dynamic push-pull device; the inner wall of the rear end of the first step surface is provided with a female thread connected to the measurement and control outer tube, and three rectangular flow openings are evenly distributed along the circumference; the outer diameter of the second step surface located in the middle is larger than the first step surface, and a sealing ring groove A and a sealing ring groove B are provided at its front and rear ends, and three positioning and distributing valve openings are evenly distributed along the circumference on the second step surface between the two sealing ring grooves; the third step surface at the front end is a slope structure, which corresponds to the positioning slope of the dynamic push-pull device, and the inner wall of the third step surface is provided with a female thread connected to the core pipe.

[0022] Specifically, the guide ports, guide flow channels, push and lean bins, and pressure relief flow channels are of the same number and correspond one to one, and are three groups in total;

[0023] The opening angle of the positioning distribution valve is 60°; the rotary distribution valve is a stepped cylindrical structure with a thinner back and a thicker front. The rear end cylinder is connected to the servo motor drive shaft, the outer diameter of the front end cylinder is the same as the inner diameter of the positioning distribution valve, and a fan-shaped groove is provided along the circumference; the opening angle of the fan-shaped groove is 65°~75°.

[0024] Specifically, the positioning and salvaging mechanism includes a sliding housing and a limit ring A connected in sequence, and a salvage spearhead disposed within the sliding housing; the rear portion of the salvage spearhead is a conical structure extending out of the sliding housing, and the front portion is a two-step surface structure, wherein the diameter of the first step surface at the rear is smaller than the diameter of the cone and larger than the diameter of the second step surface; a rack is provided on the first step surface, with a limit ring B connected to the front end of the rack; the second step surface extends out of the limit ring A, the front end of which is connected to the transition joint of the measurement, control and diversion short section; a spring B is mounted on the second step surface, and the spring B is limited by the limit rings A and B;

[0025] The sliding housing is symmetrically provided with two key slots, into which two limit blocks are inserted. One end of the limit block is semicircular and has a gear that matches the rack of the salvage spearhead, while the other end is square and has a chamfer at a right angle. The limit block is positioned on the sliding housing by a spring pin A.

[0026] A limiting groove is provided on the inner wall of the positioning short section, and the limiting groove cooperates with the limiting block of the positioning salvage mechanism to limit the positioning salvage mechanism.

[0027] Specifically, the rope salvage device includes a salvage seat, the outer surface of which is a three-step surface; the first step surface is provided with a male thread for installing a locking nut for fixing the coring rope; the outer diameter of the second step surface is the same as the inner diameter of the coring drill pipe, and two key slots are processed on it, and a salvage hook is installed in the key slot through a spring pin B, and the rear part of the salvage hook is connected to the spring C; when the spring C is in a free state, the axis of the salvage hook is parallel to the axis of the salvage seat; the salvage hook can rotate around the spring pin B, and its front end is provided with an L-shaped hook head, and the front part of the hook head is provided with a guide inclined surface; the front end of the third step surface is provided with an inner conical surface, and the inner conical surface matches the conical structure of the salvage spearhead.

[0028] Specifically, the coring drill bit adopts an annular structure; the coring tube adopts a hollow structure; and the coring drill rod adopts an inner and outer flat structure.

[0029] A flushing fluid dynamic pushing and rotating directional deflecting continuous rope coring method is provided, and the method is implemented based on the flushing fluid dynamic pushing and rotating directional deflecting continuous rope coring drill tool, comprising the following steps:

[0030] Step 1: Connect the rotary directional deflection drilling tools: Connect the core drill bit, dynamic push-pull whipstock, positioning sub and core drill pipe in sequence, and lower them to the bottom of the borehole;

[0031] Step 2: Connecting and running the continuous coring drill: Based on the planned and actual drilling trajectory, formulate drilling trajectory control instructions and import them into the measurement and control diversion sub. Connect the coring tube, measurement and control diversion sub, and positioning and salvaging mechanism in sequence and place them into the rotary directional and deflecting drill. Start the mud pump and inject high-pressure flushing fluid into the rotary directional and deflecting drill. Driven by the high-pressure flushing fluid, the continuous coring drill reaches the bottom of the hole and is keyed into the rotary directional and deflecting drill.

[0032] Step 3: Rotary directional drilling: Start the mud pump to provide high-pressure flushing fluid to the rotary directional drilling tool. After the flushing fluid returns from the hole, start the drilling rig to rotate the rotary directional drilling tool to perform circular drilling and rock crushing. During the drilling process, the measurement and control diversion short section is used to monitor the rotation speed of the rotary directional drilling tool in real time, and the direction of the rotary distribution valve is adjusted according to the control instructions and the rotation speed of the rotary directional drilling tool to control the flow channel of the high-pressure flushing fluid. After the high-pressure flushing fluid enters the corresponding guide flow channel, the corresponding push block is pushed out to support the hole wall, generating a drilling trajectory deflecting force, and controlling the drilling trajectory to drill in the predetermined direction; the cylindrical core produced by drilling enters the core tube;

[0033] Step 4: Salvage of continuous coring drill tool: After the coring tube is filled with core, first stop the rotary directional inclination drill tool, lift the rotary directional inclination drill tool 10-20 cm, and break the core; secondly, turn off the mud pump, retract all the pushing blocks of the dynamic push-pull whipstock, and keep it still for 30-50 seconds. The measurement and control diversion short section measures the drilling trajectory parameters; then place the rope salvage device into the rotary directional inclination drill tool, start the mud pump, and inject high-pressure flushing fluid into the rotary directional inclination drill tool. Driven by the high-pressure flushing fluid, the rope salvage device reaches the continuous coring drill tool and docks with the positioning salvage spearhead; then use the winch to pull the rope salvage device outward to lift the continuous coring drill tool out of the hole; finally, remove the core in the coring tube, remove the positioning salvage mechanism, and read the drilling trajectory data measured by the measurement and control diversion short section;

[0034] Step 5: Continuous directional coring: Repeat steps 2 to 4 for continuous directional coring until the designed hole depth is reached.

[0035] Compared with the prior art, the present invention has the following technical effects:

[0036] The present invention adopts a combination of dynamic pushing and rotating directional inclination and continuous rope coring, uses the high-pressure flushing fluid provided by the drilling mud pump as the driving power source, realizes inclination direction control by dynamically controlling the flushing fluid flow channel, and realizes efficient core extraction by rope salvage, which solves the problems of high equipment cost, low overall efficiency, trajectory control lag, low coring rate, narrow applicable stratum range, and limited exploration distance in geological drilling exploration. Rock samples can be continuously taken while the drilling trajectory is precisely controlled, thereby improving the rock core sampling rate and sampling accuracy of geological drilling exploration, and providing technical equipment guarantee for mineral resource assessment, underground engineering exploration, geological disaster prevention and control, etc.

[0037] The drilling tool of the present invention has a simple structure and low purchase cost. A set of drilling tools can realize both directional drilling and continuous coring, thereby reducing the demand for drilling equipment and lowering the equipment purchase cost.

[0038] The continuous directional coring method of the present invention has high comprehensive efficiency. It has both precise control of the drilling trajectory and continuous coring functions, does not require frequent drilling, and has high comprehensive efficiency.

[0039] The present invention has high real-time trajectory control accuracy. During the drilling process, the drilling trajectory is measured in real time and feedback control is performed, which improves the drilling trajectory control accuracy and ensures the coring accuracy.

[0040] The present invention has a high core sampling rate in drilling. Core sampling can be performed in the entire hole section of the directional drilling, and the core sampling rate is high, and important stratum information will not be missed.

[0041] This invention is applicable to a wide range of strata and can coring depths far. The drilling power comes from the hole drill, which is more than ten times higher than that of the bottom-hole screw motor, improving drilling efficiency and the applicable stratum range. During drilling trajectory control, the drill rod continuously rotates, resulting in smoother borehole walls and less resistance to drilling and slag removal, facilitating deep-hole coring operations. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Figure 1 This is a schematic diagram of the structure of a continuous rope coring drill tool with dynamic pushing and rotating directional deflection of flushing fluid.

[0043] Figure 2 It is a schematic diagram of the dynamic push-pull whipstock structure.

[0044] Figure 3 It is a schematic diagram of the dynamic pushing and guiding mechanism of the whipstock.

[0045] Figure 4 It is a structural diagram of the AA section of the dynamic push-pull whipstock.

[0046] Figure 5 It is a schematic diagram of the reciprocating seat structure.

[0047] Figure 6 It is a schematic diagram of the structure of the measurement and control diversion short section.

[0048] Figure 7 It is a structural diagram of the BB section of the measurement and control diversion short section.

[0049] Figure 8 It is a schematic diagram of the structure of the positioning distribution valve.

[0050] Figure 9 It is a schematic diagram of the positioning short section structure.

[0051] Figure 10 It is a structural diagram of the positioning and salvage mechanism.

[0052] Figure 11 It is a schematic diagram of the structure of a rope salvage device.

[0053] The meaning of each number in the figure is:

[0054] 1. Coring drill bit, 2. Dynamic push-pull whipstock, 3. Positioning nipple, 4. Coring drill pipe, 5. Coring tube, 6. Measurement and control diversion nipple, 7. Positioning and salvaging mechanism, 8. Rope salvage device, 9. Outer whipstock, 10. Push-pull chamber, 11. Diversion port, 12. Positioning ramp, 13. Guide channel, 14. Pressure relief channel, 15. Reciprocating seat, 16. Limit screw, 17. Spring A, 18. Push-pull block, 19. Positioning and flow distribution valve, 20. Outer whipstock, 21. Transition joint, 22. Servo motor, 23. Control module, 24. Power supply module, 25. Measuring module, 26. Flow port, 27. Sealing ring groove A, 28. Sealing ring groove B, 29. Positioning distribution valve port, 30. Rotary distribution valve, 31. Aviation plug, 32. Limit groove, 33. Sliding housing, 34. Limit ring A, 35. Salvage spearhead, 36. Limit ring B, 37. Spring B, 38. Limit block, 39. Spring pin A, 40. Salvage seat, 41. Locking nut, 42. Spring C, 43. Spring pin B, 44. Salvage hook. DETAILED DESCRIPTION

[0055] Specific embodiments of the present invention are given below. It should be noted that the present invention is not limited to the following specific embodiments, and all equivalent modifications made on the basis of the technical solution of this application fall within the protection scope of the present invention.

[0056] Example 1:

[0057] The present embodiment provides a flushing liquid dynamic pushing rotary directional deflecting continuous rope coring drill tool, including a rotary directional deflecting drill tool and a continuous coring drill tool arranged inside the rotary directional deflecting drill tool; the rotary directional deflecting drill tool includes a coring drill bit 1, a dynamic pushing deflecting device 2, a positioning short section 3 and a coring drill rod 4 connected in sequence; the continuous coring drill tool includes a coring tube 5, a measurement and control diversion short section 6 and a positioning salvage mechanism 7 connected in sequence, and a rope salvage device 8 detachably mounted on the positioning salvage mechanism.

[0058] After the continuous coring drill tool is positioned in the rotary directional deflecting drill tool, the measurement and control diversion short section 6 can control the high-pressure flushing fluid to flow into a certain flow channel in the dynamic push-pull whipstock 2 and make the push block 18 of the push-pull guide mechanism in the flow channel radially pushed out and supported on the hole wall, so as to generate a deflecting force to control the deflecting direction; after the rope salvage device 8 is docked with the positioning salvage mechanism 7, the continuous coring drill tool can be lifted out of the hole by pulling the rope salvage device 8 outward to extract the core in the core tube 5, and the drilling trajectory data measured by the measurement and control diversion short section 6 can be read, so that continuous coring can be carried out while the drilling trajectory is precisely controlled.

[0059] The dynamic pushing and leaning whipstock 2 includes an outer whipstocking tube 9, the front outer wall of which is provided with circumferentially evenly distributed grooves as pushing bins 10, and each pushing bin 10 is provided with a radially contractible pushing guide mechanism; the rear inner wall of the outer whipstocking tube 9 is provided with a plurality of circumferentially evenly distributed guide ports 11 and a positioning inclined surface 12; the side wall of the outer whipstocking tube 9 is provided with a plurality of flow channels, the flow channel connecting the guide port 11 and the pushing bin 10 is a guide flow channel 13, and the flow channel connecting the pushing bin 10 and the front end of the whipstocking tube 9 is a pressure relief flow channel 14.

[0060] The pushing guide mechanism includes a reciprocating seat 15, a limit screw 16, a spring A17 and a pushing block 18; the limit screw 16 is arranged along the radial direction of the deflecting outer tube 9, and the limit screw 16 vertically penetrates the reciprocating seat 15 and is screwed to the bottom of the pushing bin 10. The spring A17 is sleeved on the limit screw 16 and the spring A17 is resting between the nut of the limit screw 16 and the reciprocating seat 15; the pushing block 18 is connected to the reciprocating seat 15 and is close to the side wall of the pushing bin 10; when high-pressure liquid flows through the flow channel, it can radially push the reciprocating seat 15 and compress the spring A17 to make the pushing block 18 radially extend and support on the hole wall to generate a deflecting force.

[0061] Specifically, the front end of the inclined outer tube 9 is provided with a male thread, and the rear end is provided with a female thread; three circular pushing bins 10 are evenly arranged along the circumference near the male thread on the outer surface of the inclined outer tube 9, and three guide ports 11 and a positioning inclined surface 12 are evenly arranged near the female thread on the inner surface; three guide flow channels 13 and three pressure relief flow channels 14 are provided in the body of the inclined outer tube 9; the highest point of the positioning inclined surface 12 is on the same cross-section as the center of one of the guide ports 11; a threaded hole is processed at the center of the pushing bin 10. The limiting screw 16 is connected to the pushing bin 10, and its front end is provided with two step surfaces. The first step surface is provided with a male thread corresponding to the threaded hole of the pushing bin 10, and the second step surface is an external hexagonal structure; the reciprocating seat 15 is positioned in the pushing bin 10 by the limiting screw 16, and the center of the reciprocating seat 15 is provided with a circular boss facing inward, and the circular boss is provided with an internal hexagonal hole corresponding to the external hexagonal structure of the limiting screw 16. A spring A17 is provided between the reciprocating seat 15 and the limiting screw 16, and a pushing block 18 is connected to the reciprocating seat 15; the pushing block 18 is provided with an internal hexagonal mounting hole.

[0062] The measurement and control flow guide sub 6 includes a positioning flow distribution valve 19, a measurement and control outer pipe 20 and a transition joint 21 which are connected in sequence.

[0063] The front end of the measurement and control outer tube 20 is closed and provided with a small hole, and the rear end is open and connected to the transition joint 21. A servo motor 22, a control module 23, a power supply module 24, and a measuring module 25 are provided inside it. The measuring module 25 can measure the rotation speed, vibration and drilling trajectory of the rotary directional inclination drilling tool in real time; the servo motor 22 drive shaft extends out of the small hole at the front end of the measurement and control outer tube 20.

[0064] The rear end of the positioning distribution valve 19 is a blind hole and a rotary distribution valve 30 connected to the drive shaft of the servo motor 22 is provided in the blind hole. The front outer wall of the positioning distribution valve 19 is a slope structure and can correspond to the positioning slope of the dynamic pushing whipstock 2. The side wall of the positioning distribution valve 19 is provided with circumferentially uniformly distributed positioning distribution valve ports 29 and can correspond one-to-one with the guide port 11; the rotary distribution valve 30 can make the positioning distribution valve port 29 and its corresponding guide port 11 connected, thereby controlling the pushing block 18 of the pushing guide mechanism to radially extend in a predetermined direction to generate a whipstock force.

[0065] The transition joint 21 is provided with an aviation plug 31 , which is electrically connected to the control module 23 .

[0066] The outer surface of the positioning and distributing valve 19 is a three-level step surface. The outer diameter of the first step surface at the rear end is the same as the outer diameter of the measurement and control outer tube 20, and the outer diameter of the measurement and control outer tube 20 is smaller than the inner diameter of the dynamic push-pull device 2; the inner wall of the rear end of the first step surface is provided with a female thread connected to the measurement and control outer tube 20, and three rectangular flow openings 26 are evenly distributed along the circumference; the outer diameter of the second step surface located in the middle is larger than the first step surface, and a sealing ring groove A27 and a sealing ring groove B28 are provided at its front and rear ends. The second step surface between the two sealing ring grooves has three rectangular positioning and distributing valve openings 29 evenly distributed along the circumference; the third step surface at the front end is a slope structure, which corresponds to the positioning slope 12 of the dynamic push-pull device 2, and its highest point is in the same cross-section as the center line of one of the positioning and distributing valve openings 29, and the inner wall of the third step surface is provided with a female thread connected to the core pipe 5.

[0067] The number of the guide ports 11 , the guide flow channels 13 , the pushing and leaning bins 10 , and the pressure relief flow channels 14 are the same and correspond one to one, and there are three groups in total. Each group of components is on the same cross-section and is interconnected.

[0068] The opening angle of the positioning distribution valve port 29 is 60°; the rotary distribution valve 30 is a stepped cylindrical structure with a thinner back and a thicker front. The rear end cylinder is connected to the drive shaft of the servo motor 22, and the outer diameter of the front end cylinder is the same as the inner diameter of the positioning distribution valve 19, and a fan-shaped groove is provided along the circumference; the opening angle of the fan-shaped groove is 65°~75°.

[0069] The positioning and salvaging mechanism 7 includes a sliding shell 33 and a limiting ring A34 connected in sequence, and a salvage spearhead 35 arranged in the sliding shell 33; the rear part of the salvage spearhead 35 is a conical structure and extends out of the sliding shell 33, and the front part is a two-step surface structure, the diameter of the first step surface located at the rear is smaller than the diameter of the cone and larger than the diameter of the second step surface; a rack is provided on the first step surface, and a male thread is provided at the front end of the rack, and a limiting ring B36 is connected to the male thread; the second step surface extends out of the limiting ring A34, and its front end is provided with a male thread connected to the transition joint 21 of the measurement and control diversion short section 6, and a spring B37 is installed on the second step surface, and the spring B37 is limited by the limiting ring A34 and the limiting ring B36.

[0070] Two key slots are symmetrically provided on the sliding housing 33, and two limit blocks 38 are inserted into the key slots. One end of the limit block 38 is semicircular and has a gear that matches the rack of the salvage spearhead 35, and the other end is square and has a chamfer at a right angle; the limit block 38 is positioned on the sliding housing 33 by a spring pin A39.

[0071] A limiting groove 32 is provided on the inner wall of the positioning sub 3 , and the limiting groove 32 cooperates with the limiting block 38 of the positioning and salvaging mechanism 7 to limit the positioning and salvaging mechanism 7 .

[0072] The rope salvage device 8 includes a salvage seat 40, the outer surface of which is a three-step surface, specifically:

[0073] The first step surface is provided with a male thread for installing a locking nut 41 for fixing the coring rope;

[0074] The outer diameter of the second step surface is the same as the inner diameter of the core drill rod 4, and two keyways are machined thereon. A salvage hook 44 is mounted in the keyway via a spring pin B43. The rear of the salvage hook 44 is connected to a spring C42. The width of the keyway is the same as the thickness of the salvage hook 44. When the spring C42 is in a free state, the axis of the salvage hook 44 is parallel to the axis of the salvage seat 40. The salvage hook 44 can rotate around the spring pin B43. The front end of the salvage hook 44 is provided with an L-shaped hook head, and the front of the hook head is provided with a guide slope.

[0075] The front end of the third step has an inner conical surface, which matches the conical structure of the salvage spearhead 35.

[0076] In this embodiment, the coring drill bit 1 adopts an annular structure; the coring tube 5 adopts a hollow structure; and the coring drill rod 4 adopts an inner and outer flat structure.

[0077] The measurement and control diversion sub 6 measures its own vibration in real time and controls the measurement and control diversion sub in three operating modes according to the vibration frequency and amplitude:

[0078] State 1: Sleep mode: When the measured vibration frequency and amplitude are lower than the threshold, it is determined that the drilling is not in progress and the measurement and control diversion sub 6 is in sleep mode to save power.

[0079] State 2: Speed measurement and control mode: When the measured vibration frequency and amplitude are higher than the threshold, it is determined that the drilling state is in progress. The measurement and control diversion sub 6 starts the speed measurement function and uses the servo motor 22 to control the direction of the rotary distribution valve 30 to control the drilling trajectory.

[0080] State 3: Drilling trajectory parameter measurement mode: When the measured vibration frequency and amplitude drop from above the threshold to below the threshold, it is judged that the drilling is in the stopped state, the measurement and control diversion short section 6 starts the trajectory parameter measurement function, and uses the stable data between 30 and 50 seconds of static state as the drilling trajectory measurement data; after the measurement is completed, the measurement and control diversion short section 6 enters the sleep mode.

[0081] Example 2:

[0082] This embodiment provides a method for continuous wireline coring with dynamic pushing and rotary directional deflecting by flushing fluid. The method is based on the continuous wireline coring drill tool with dynamic pushing and rotary directional deflecting by flushing fluid in the first embodiment, and includes the following steps:

[0083] Step 1: Connect the rotary directional deflection drilling tool: Connect the core drill bit 1, dynamic push-pull whipstock 2, positioning sub 3 and core drill pipe 4 in sequence, and lower them to the bottom of the borehole;

[0084] Step 2: Connecting and running the continuous coring drill: Based on the planned and actual drilling trajectory, formulate a drilling trajectory control command and import it into the measurement and control diversion sub 6. Connect the coring tube 5, the measurement and control diversion sub 6, and the positioning and salvaging mechanism 7 in sequence and place them into the rotary directional and deflecting drill. Start the mud pump and inject high-pressure flushing fluid into the rotary directional and deflecting drill. Driven by the high-pressure flushing fluid, the continuous coring drill reaches the bottom of the hole and is keyed into the rotary directional and deflecting drill.

[0085] Step 3: Rotary directional and deflection drilling: Start the mud pump to provide high-pressure flushing fluid to the rotary directional and deflection drill tool in the hole. After the flushing fluid returns from the hole mouth, start the drilling rig to rotate the rotary directional and deflection drill tool to perform circular drilling and rock crushing. During the drilling process, the measurement and control diversion short section 6 is used to monitor the rotation speed of the rotary directional and deflection drill tool in real time, and the valve port direction of the rotary distribution valve 30 is adjusted according to the control instruction and the rotation speed of the rotary directional and deflection drill tool to control the flow channel of the high-pressure flushing fluid. After the high-pressure flushing fluid enters the corresponding guide flow channel 13, the corresponding push block 18 is pushed out to support it on the hole wall, generating a drilling trajectory deflecting force, and controlling the drilling trajectory to drill in the predetermined direction; the cylindrical core produced by drilling enters the core tube 5;

[0086] Step 4: Salvage of continuous coring drill tool: After the coring tube 5 is filled with core, first stop the rotation of the rotary directional inclination drill tool, lift the rotary directional inclination drill tool 10 to 20 cm, and break the core; secondly, turn off the mud pump, retract all the pushing blocks 18 of the dynamic push-pull whipstock 2, and keep it still for 30 to 50 seconds, and measure the drilling trajectory parameters with the measurement and control diversion short section 6; then put the rope salvage device 8 into the rotary directional inclination drill tool, start the mud pump to inject high-pressure flushing fluid into the rotary directional inclination drill tool, and under the push of the high-pressure flushing fluid, the rope salvage device 8 reaches the continuous coring drill tool and docks with the positioning salvage spearhead 35; then use the winch to pull the rope salvage device 8 outward to lift the continuous coring drill tool out of the hole; finally, take out the core in the coring tube 5, remove the positioning salvage mechanism 7, and read the drilling trajectory data measured by the measurement and control diversion short section 6.

[0087] Step 5: Continuous directional coring: Repeat steps 2 to 4 for continuous directional coring until the designed hole depth is reached.

[0088] During the rotary directional deflection drilling in step three above, the continuous coring drill tool and the rotary directional deflection drill tool rotate synchronously.

[0089] The above-mentioned step 2 of connecting and running the continuous coring drill tool includes the following sub-steps:

[0090] Step 2.1: Importing drilling trajectory control instructions: Connect the aviation plug 31 of the measurement and control diversion sub 6 to the ground data processing host via a data cable, and import the drilling trajectory control instructions to the measurement and control diversion sub 6 through the ground processing host;

[0091] Step 2.2: Lowering the continuous coring drill: The high-pressure flushing fluid provided by the mud pump pushes the continuous coring drill toward the bottom of the hole. During this movement, the limit block 38, constrained by the inner hole of the rotary directional and deflecting drill, rotates toward the hole mouth along the rack on the salvage spearhead 35, shrinking inward until its outer diameter is smaller than the inner diameter of the rotary directional and deflecting drill. At the same time, it drives the sliding housing 33 to move toward the rear end, compressing the spring B37.

[0092] Step 2.3: Positioning of continuous coring drill tool: When the third step surface of the flow distribution valve 19 of the measurement and control diversion short section 6 enters the positioning inclined surface 12 of the dynamic push-pull whipstock 2, the continuous coring drill tool seat key is guided by the positioning inclined surface 12 of the dynamic push-pull whipstock 2, and its axial front end and circumferential direction are limited; at this time, the limit block 38 enters the limiting groove 32 of the positioning short section 3, and under the action of the spring B37, the sliding shell 33 moves toward the front end, driving the limit block 38 to rotate and expand toward the bottom of the hole along the rack on the salvage spearhead 35, and supported in the limiting groove 32 of the positioning short section 3, so as to limit the axial rear end of the continuous coring drill tool.

[0093] The above step 3 of rotary directional drilling includes the following sub-steps:

[0094] Step 3.1: Positioning the rotary flow distribution valve 30 of the measurement and control diversion sub 6: Start the mud pump to provide high-pressure flushing fluid to the rotary directional drilling tool in the hole. The measurement and control diversion sub 6 starts working. According to the drilling trajectory control command, the servo motor 22 drives the rotary flow distribution valve 30 to rotate to the specified position.

[0095] Step 3.2: Dynamically control the flushing fluid flow path: Use the directional drilling rig to rotate the rotary directional and deflecting drill bit. The measurement and control diversion sub 6 measures the rotation speed of the rotary directional and deflecting drill bit in real time. Then, the rotary distribution valve 30 is rotated in the opposite direction at the same speed to keep the direction of the rotary distribution valve 30 unchanged. When the positioning distribution valve port 29 rotates into the relative angle range of the rotary distribution valve 30, the flushing fluid enters the positioning distribution valve port 29 along the rotary distribution valve 30 and enters the diversion port 11 that is dynamically pushed against the whipstock 2. The other positioning distribution valve ports 29 and diversion ports 11 are closed, and no flushing fluid flows in.

[0096] Step 3.3: Dynamic Pushing and Deflection Correction: After the flushing fluid enters the diversion port 11, it flows along the guide channel 13 to the pushing chamber 10. Due to the narrowing of the flow channel, the high pressure of the flushing fluid pushes the reciprocating seat 15, driving the pushing block 18 to extend the dynamic pushing and deflecting device 2 radially along the borehole. This is supported on the borehole wall, thereby applying an opposite deflecting force to the core drill bit 1, correcting the drilling trajectory to the designed direction. After flowing through the pushing chamber 10, the high-pressure flushing fluid flows out along the pressure relief channel to the bottom of the hole, cooling the core drill bit 1 and carrying the rock debris generated during drilling back out of the borehole.

[0097] Step 3.4: Continuous deflection correction: When the rotary directional deflection drill bit rotates to break rock, the positioning distribution valve port 29 of the measurement and control diversion short section 6 is connected to the rotary distribution valve 30 in sequence, and the corresponding push block 18 is pushed out in a fixed direction to support it on the hole wall, forming a continuous deflection force and continuously controlling the drilling trajectory;

[0098] Step 3.5: Core collection: The coring drill bit 1 crushes the rock in an annular shape, and the cylindrical core produced in the center enters the coring tube 5.

[0099] The preferred embodiments of the present invention are described in detail above in conjunction with the accompanying drawings. However, the present invention is not limited to the specific details in the above embodiments. Within the technical concept of the present invention, various simple modifications can be made to the technical solution of the present invention, and these simple modifications all fall within the scope of protection of the present invention.

[0100] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any appropriate manner without contradiction. To avoid unnecessary repetition, the present invention will not further describe various possible combinations.

[0101] In addition, the various embodiments of the present invention may be arbitrarily combined, and as long as they do not violate the concept of the present invention, they should also be regarded as the contents disclosed by the present invention.

Claims

1. A flushing fluid dynamic push-rotation directional deflection continuous wireline coring drill, characterized in that: The invention comprises a rotary directional deflecting drilling tool and a continuous coring drilling tool arranged therein; the rotary directional deflecting drilling tool comprises a coring drill bit (1), a dynamic push-pull whipstock (2), a positioning short section (3) and a coring drill rod (4) connected in sequence; the continuous coring drilling tool comprises a coring pipe (5), a measurement and control diversion short section (6) and a positioning salvage mechanism (7) connected in sequence, and a rope salvage device (8) detachably connected to the positioning salvage mechanism; After the continuous coring drill tool is positioned in the rotary directional deflecting drill tool, the measuring and control flow guide short section (6) can control the high-pressure flushing fluid to flow into a certain flow channel in the dynamic push-pushing device (2) and make the push block (18) of the push-pushing guide mechanism in the flow channel radially push out and support on the hole wall, so as to generate a deflecting force to control the deflecting direction; after the rope salvage device (8) is docked with the positioning salvage mechanism (7), the continuous coring drill tool can be lifted out of the hole by pulling the rope salvage device (8) outward to extract the core in the core tube (5), and the drilling trajectory data measured by the measuring and control flow guide short section (6) can be read, so that continuous coring can be carried out while the drilling trajectory is accurately controlled.

2. The flushing liquid dynamic pushing rotary directional deflection continuous wireline coring drill according to claim 1, characterized in that: The dynamic pushing and leaning device (2) comprises an outer leaning tube (9), the front outer wall of the outer leaning tube (9) is provided with circumferentially evenly distributed grooves as a leaning chamber (10), and each leaning chamber (10) is provided with a radially contractible pushing guide mechanism; the rear inner wall of the outer leaning tube (9) is provided with a plurality of circumferentially evenly distributed flow guide ports (11) and a positioning inclined surface (12); the side wall of the outer leaning tube (9) is provided with a plurality of flow channels, the flow channel connecting the flow guide port (11) and the leaning chamber (10) is a guide flow channel (13), and the flow channel connecting the leaning chamber (10) and the front end of the outer leaning tube (9) is a pressure relief flow channel (14).

3. The flushing liquid dynamic pushing rotary directional deflection continuous wireline coring drill according to claim 2, characterized in that: The pushing guide mechanism includes a reciprocating seat (15), a limiting screw (16), a spring A (17) and a pushing block (18); the limiting screw (16) is arranged along the radial direction of the deflecting outer tube (9), and the limiting screw (16) vertically penetrates the reciprocating seat (15) and is screwed to the bottom of the pushing bin (10), and the spring A (17) is sleeved on the limiting screw (16) and the spring A (17) is pressed between the nut of the limiting screw (16) and the reciprocating seat (15); the pushing block (18) is connected to the reciprocating seat (15) and is tightly attached to the side wall of the pushing bin (10); when high-pressure liquid flows through the flow channel, it can radially push the reciprocating seat (15) and compress the spring A (17) so that the pushing block (18) is radially extended to support the hole wall to generate a deflecting force.

4. The flushing liquid dynamic pushing rotary directional deflection continuous wireline coring drill according to claim 2, characterized in that: The measurement and control flow guide short section (6) comprises a positioning flow distribution valve (19), a measurement and control outer tube (20) and a transition joint (21) which are connected in sequence; The front end of the measurement and control outer tube (20) is closed and provided with a small hole, and the rear end is open and connected to the transition joint (21). A servo motor (22), a control module (23), a power supply module (24), and a measuring module (25) are provided inside the outer tube. The measuring module (25) can measure the rotation speed, vibration, and drilling trajectory of the rotary directional and deflecting drilling tool in real time. The driving shaft of the servo motor (22) extends out of the small hole at the front end of the measurement and control outer tube (20); The rear end of the positioning distribution valve (19) is a blind hole, and a rotary distribution valve (30) connected to the drive shaft of the servo motor (22) is provided in the blind hole. The front outer wall of the positioning distribution valve (19) is an inclined surface structure and can correspond to the positioning inclined surface of the dynamic push-to-bend device (2). The side wall of the positioning distribution valve (19) is provided with circumferentially uniformly distributed positioning distribution valve ports (29) and can correspond one-to-one with the guide ports (11). The rotary distribution valve (30) can make the positioning distribution valve ports (29) and the corresponding guide ports (11) conduct, thereby controlling the pushing block (18) of the pushing guide mechanism to radially extend in a predetermined direction to generate a deflecting force. An aviation plug (31) is provided on the transition joint (21), and the aviation plug (31) is electrically connected to the control module (23).

5. The flushing liquid dynamic pushing rotary directional deflection continuous wireline coring drill according to claim 4, characterized in that: The outer surface of the positioning and distributing valve (19) is a three-step surface. The outer diameter of the first step surface at the rear end is the same as the outer diameter of the measuring and controlling outer tube (20), and the outer diameter of the measuring and controlling outer tube (20) is smaller than the inner diameter of the dynamic pushing and whipstocking device (2); the inner wall of the rear end of the first step surface is provided with a female thread connected to the measuring and controlling outer tube (20), and three rectangular flow openings (26) are evenly distributed along the circumference; the outer diameter of the second step surface located in the middle is larger than the first step surface, and a sealing ring groove A (27) and a sealing ring groove B (28) are provided at its front and rear ends, and three positioning and distributing valve openings (29) are evenly distributed along the circumference on the second step surface between the two sealing ring grooves; the third step surface at the front end is a slope structure, which corresponds to the positioning slope (12) of the dynamic pushing and whipstocking device (2), and the inner wall of the third step surface is provided with a female thread connected to the core tube (5).

6. The flushing liquid dynamic pushing rotary directional deflection continuous wireline coring drill according to claim 5, characterized in that: The guide ports (11), guide flow channels (13), push and lean bins (10), and pressure relief flow channels (14) are identical in number and correspond one to one, forming three groups in total; The positioning distribution valve port (29) has an opening angle of 60°; the rotary distribution valve (30) is a stepped cylindrical structure with a thinner rear end and a thicker front end, the rear end cylinder is connected to the drive shaft of the servo motor (22), the front end cylinder has an outer diameter that is the same as the inner diameter of the positioning distribution valve (19), and a fan-shaped groove is provided along the circumference; the opening angle of the fan-shaped groove is 65° to 75°.

7. The flushing fluid dynamic pushing rotary directional deflection continuous wireline coring drill according to claim 1, characterized in that: The positioning and salvaging mechanism (7) comprises a sliding housing (33) and a limiting ring A (34) connected in sequence, and a salvaging spearhead (35) arranged in the sliding housing (33); the rear portion of the salvaging spearhead (35) is a conical structure and extends out of the sliding housing (33), and the front portion is a two-step surface structure, wherein the diameter of the first step surface at the rear portion is smaller than the diameter of the cone and larger than the diameter of the second step surface; a rack is provided on the first step surface, and a limiting ring B (36) is connected to the front end of the rack; the second step surface extends out of the limiting ring A (34), and its front end is connected to the transition joint (21) of the measurement and control guide short section (6); a spring B (37) is mounted on the second step surface, and the spring B (37) is limited by the limiting ring A (34) and the limiting ring B (36); The sliding housing (33) is symmetrically provided with two key slots, and two limit blocks (38) are inserted into the key slots. One end of the limit block (38) is semicircular and provided with a gear that matches the rack of the salvage spearhead (35), and the other end is square and provided with a chamfer at a right angle. The limit block (38) is positioned on the sliding housing (33) by a spring pin A (39); The inner wall of the positioning short section (3) is provided with a limiting groove (32), and the limiting groove (32) cooperates with the limiting block (38) of the positioning salvage mechanism (7) to limit the positioning salvage mechanism (7).

8. The flushing fluid dynamic pushing rotary directional deflection continuous wireline coring drill according to claim 7, characterized in that: The rope salvage device (8) comprises a salvage seat (40), the outer surface of which is a three-step surface; a male thread is provided on the first step surface for installing a locking nut (41) for fixing a coring rope; the outer diameter of the second step surface is the same as the inner diameter of the coring drill rod (4), and two key slots are processed on the second step surface, in which a salvage hook (44) is installed through a spring pin B (43), and the rear part of the salvage hook (44) is connected to a spring C (42); when the spring C (42) is in a free state, the axis of the salvage hook (44) is parallel to the axis of the salvage seat (40); the salvage hook (44) can rotate around the spring pin B (43), and the front end of the salvage hook (44) is provided with an L-shaped hook head, and the front part of the hook head is provided with a guiding inclined surface; the front end of the third step surface is provided with an inner conical surface, and the inner conical surface matches the cone structure of the salvage spearhead (35).

9. The flushing fluid dynamic pushing rotary directional deflection continuous wireline coring drill according to claim 1, characterized in that: The coring drill bit (1) adopts an annular structure; the coring tube (5) adopts a hollow structure; and the coring drill rod (4) adopts an inner and outer flat structure.

10. A continuous rope coring method with dynamic pushing and rotating directional deflection of flushing liquid, characterized in that: The method is implemented based on the flushing fluid dynamic pushing rotary directional deflecting continuous wireline coring drill tool according to any one of claims 2 to 9, and includes the following steps: Step 1: Connect the rotary directional deflection drilling tools: Connect the core drill bit, dynamic push-pull whipstock, positioning sub and core drill pipe in sequence, and lower them to the bottom of the borehole; Step 2: Connecting and running the continuous coring drill: Based on the planned and actual drilling trajectory, formulate drilling trajectory control instructions and import them into the measurement and control diversion sub. Connect the coring tube, measurement and control diversion sub, and positioning and salvaging mechanism in sequence and place them into the rotary directional and deflecting drill. Start the mud pump and inject high-pressure flushing fluid into the rotary directional and deflecting drill. Driven by the high-pressure flushing fluid, the continuous coring drill reaches the bottom of the hole and is keyed into the rotary directional and deflecting drill. Step 3: Rotary directional drilling: Start the mud pump to provide high-pressure flushing fluid to the rotary directional drilling tool. After the flushing fluid returns from the hole, start the drilling rig to rotate the rotary directional drilling tool to perform circular drilling and rock crushing. During the drilling process, the measurement and control diversion short section is used to monitor the rotation speed of the rotary directional drilling tool in real time, and the direction of the rotary distribution valve is adjusted according to the control instructions and the rotation speed of the rotary directional drilling tool to control the flow channel of the high-pressure flushing fluid. After the high-pressure flushing fluid enters the corresponding guide flow channel, the corresponding push block is pushed out to support the hole wall, generating a drilling trajectory deflecting force, and controlling the drilling trajectory to drill in the predetermined direction; the cylindrical core produced by drilling enters the core tube; Step 4: Salvage of continuous coring drill tool: After the coring tube is filled with core, first stop the rotary directional inclination drill tool, lift the rotary directional inclination drill tool 10-20 cm, and break the core; secondly, turn off the mud pump, retract all the pushing blocks of the dynamic push-pull whipstock, and keep it still for 30-50 seconds. The measurement and control diversion short section measures the drilling trajectory parameters; then place the rope salvage device into the rotary directional inclination drill tool, start the mud pump, and inject high-pressure flushing fluid into the rotary directional inclination drill tool. Driven by the high-pressure flushing fluid, the rope salvage device reaches the continuous coring drill tool and docks with the positioning salvage spearhead; then use the winch to pull the rope salvage device outward to lift the continuous coring drill tool out of the hole; finally, remove the core in the coring tube, remove the positioning salvage mechanism, and read the drilling trajectory data measured by the measurement and control diversion short section; Step 5: Continuous directional coring: Repeat steps 2 to 4 to perform continuous directional coring until the designed hole depth is reached.

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