A borehole direction finding device

Abstract

The application discloses a drilling direction measuring device, which sequentially comprises a fishing spear head, a while-drilling measuring assembly, a fishing barrel assembly and a coring inner tube assembly, the while-drilling measuring assembly and the coring inner tube assembly are connected through the fishing barrel assembly, and the while-drilling measuring assembly is provided with a measuring sub, a centralizer and a guiding and orienting assembly. The drilling direction measuring device can measure the azimuth information of a drilling hole while coring drilling is performed, and the drilling efficiency is greatly improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of geological exploration, in particular to a drilling direction measuring device. BACKGROUND

[0002] In the field of geological exploration, the wire-line coring drilling, also known as the non-lifting coring drilling, can obtain the core of the stratum without lifting the drill, and further determine the geological data such as the geological structure, the rock property, the mineral resources and the hydrogeology.

[0003] When the conventional wire-line coring drilling tool drills a horizontal hole, the drilling trajectory cannot be kept horizontal due to the weight of the drilling tool, and will be inclined downward, and with the increase of the number of rods, the drilling tool is more affected by its own gravity. In the process of continuously returning and fishing the core, it is impossible to ensure that the obtained core can represent the geological data of the detected stratum. At present, the rotary steerable drilling technology can make the drilling tool directional drilling along the designed trajectory, but it cannot obtain the core, and after reaching the designed coring position, the conventional coring drilling tool is used for coring drilling. This method cannot continuously take cores, and misses a large amount of stratum information, and the drilling trajectory is unknown during the coring process, which affects the representativeness of the core to the geological data of the target stratum.

[0004] Therefore, how to provide a drilling direction measuring device solving the above technical problems is a technical problem to be solved by those skilled in the art. SUMMARY

[0005] The purpose of the present application is to provide a drilling direction measuring device, which can measure the azimuth information of the drilling hole while coring drilling, and greatly improve the drilling efficiency.

[0006] To achieve the above purpose, the present application provides a drilling direction measuring device, which sequentially comprises a fishing spear head, a drilling while measuring assembly, a fishing barrel assembly and a coring inner tube assembly, the drilling while measuring assembly and the coring inner tube assembly are connected through the fishing barrel assembly, and the drilling while measuring assembly is provided with a measuring sub, a centralizer and a guide directional assembly.

[0007] Preferably, the drilling while measuring assembly is further provided with an extension rod and a connecting joint, the guide directional assembly is connected with the connecting joint, and the guide directional assembly is used for guiding and positioning with the positioning guide sleeve.

[0008] Preferably, the connecting joint is provided with a water inlet, the guide directional assembly is used for guiding and positioning with the helical guide sleeve fixedly welded in the positioning guide sleeve, and the guide directional assembly comprises a one-way adjusting valve communicating with the water inlet.

[0009] Preferably, the guide directional assembly further comprises a piston shaft and a sealing piston, the piston shaft is provided with a through hole, and the sealing piston is arranged on the piston shaft.

[0010] Preferably, the guiding directional assembly further comprises a positioning guide shoe between the piston shaft and the first end of the one-way adjusting valve, the positioning guide shoe is provided with a control assembly in communication with the water inlet and the one-way adjusting valve respectively, the control assembly is used to guide the water inlet and the one-way adjusting valve after the guiding directional assembly is in place.

[0011] Preferably, the positioning guide shoe is provided with a first water passage in communication with the water inlet, a second water passage in communication with the one-way adjusting valve, and a third water passage in communication with the first water passage and the second water passage, the control assembly comprises a pressure retaining valve core, and a first compression spring and a steel ball installed on the third water passage; when the guiding directional assembly is not in place, the first compression spring pushes the steel ball to block the third water passage; when the guiding directional assembly is in place, the pressure retaining valve core is used to push the steel ball to open the third water passage after being acted on by the spiral guide sleeve.

[0012] Preferably, a second compression spring and a positioning nut axially positioning the second compression spring are arranged between the positioning guide shoe and the second end of the one-way adjusting valve.

[0013] Preferably, the fishing socket assembly comprises a fishing socket body connected with the MWD assembly and the coring inner tube assembly respectively, the fishing socket body is provided with a water outlet in communication with the one-way adjusting valve.

[0014] Preferably, the fishing socket assembly further comprises a fishing hook installed on the fishing socket body, the fishing hook fixes the coring inner tube assembly.

[0015] Preferably, the fishing socket assembly further comprises a positioning pin and a third compression spring arranged on the fishing socket body, the fishing hook is movably installed on the positioning pin, and the third compression spring pushes the fishing hook to tightly fix the fishing spear head of the coring inner tube assembly.

[0016] With respect to the above background technology, the drilling direction finding device provided by the present application comprises, from top to bottom, a fishing spear head, an MWD assembly, a fishing socket assembly, and a coring inner tube assembly, the MWD assembly and the coring inner tube assembly are connected through the fishing socket assembly, and the MWD assembly is provided with a measuring sub, a centralizer, and a guiding directional assembly.

[0017] In the description of the borehole direction finding device, the spear head is installed at the top of the device for connecting with the rope fisher to pull out the measuring device; the guide orientation assembly is arranged to guide the orientation of the measuring assembly to ensure that the angle between the measuring device and the reference surface of the drill bit remains unchanged; the measuring sub is used to measure the direction of the borehole, and the centralizer ensures the coaxiality of the measuring device; the coring inner tube assembly collects the core during the coring while drilling measurement, and the fishing barrel assembly connects the coring inner tube assembly and ensures that the coring inner tube is pulled out together. The borehole direction finding device can measure the direction information of the borehole while coring drilling, greatly improving the drilling efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are only embodiments of the present application, and other drawings can also be obtained according to the provided drawings without creative labor for those skilled in the art.

[0019] Figure 1 The overall structure of the borehole direction finding device provided by the embodiment of the present application is shown in the cross-sectional view.

[0020] Figure 2 The structure of the guide orientation assembly provided by the embodiment of the present application is shown in the schematic view.

[0021] Figure 3 The assembly of the guide orientation assembly and the spiral guide sleeve provided by the embodiment of the present application is shown in the schematic view.

[0022] Figure 4 The structure of the fishing barrel assembly provided by the embodiment of the present application is shown in the schematic view.

[0023] Wherein:

[0024] 1-spear head, 2-while-drilling measuring assembly, 2.1-measuring sub, 2.2-centralizer, 2.3-lengthening rod, 2.4-connection joint, 2.4.1-water inlet, 2.5-guide orientation assembly, 2.5.1-piston shaft, 2.5.2-sealing piston, 2.5.3-positioning guide shoe, 2.5.3.1-first water passage, 2.5.3.2-second water passage, 2.5.3.3-third water passage, 2.5.4-first compression spring, 2.5.5-pressure retaining valve core, 2.5.6-steel ball, 2.5.7-one-way adjusting valve, 2.5.8-second compression spring, 2.5.9-positioning nut, 3-fishing barrel assembly, 3.1-fishing barrel body, 3.1.1-water outlet, 3.2-fishing hook, 3.3-positioning pin, 3.4-third compression spring, 4-coring inner tube assembly, 5-coring drilling tool, 6-positioning guide sleeve, 6.1-spiral guide sleeve, 7-non-magnetic drill pipe. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all the other embodiments obtained by a person of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0026] In order for those skilled in the art to better understand the present application, the present application will be further described in detail below with reference to the drawings and specific embodiments.

[0027] Please refer to Figures 1 to 4 , wherein, Figure 1 is the overall structure of the drilling direction finding device provided by the embodiment of the present application, Figure 2 is the structure schematic diagram of the guide directional assembly provided by the embodiment of the present application, Figure 3 is the assembly schematic diagram of the guide directional assembly and the spiral lead sleeve provided by the embodiment of the present application, Figure 4 is the structure schematic diagram of the fishing barrel assembly provided by the embodiment of the present application.

[0028] In order to realize the synchronous measurement of the hole direction during coring and improve the accuracy of obtaining the core, the present application designs a drilling direction finding device for a wireline coring drilling tool.

[0029] In the first specific embodiment, the drilling direction finding device provided by the present application includes, from top to bottom, a spear head 1, a while-drilling measurement assembly 2, a fishing barrel assembly 3 and a coring inner tube assembly 4 in sequence, the while-drilling measurement assembly 2 and the coring inner tube assembly 4 are connected through the fishing barrel assembly 3, and the while-drilling measurement assembly 2 is provided with a measurement sub 2.1, a centralizer 2.2 and a guide directional assembly 2.5.

[0030] In use, the drilling direction finding device is installed in an outer tube, the outer tube mainly includes a directional lead sleeve 6 and a non-magnetic drill pipe 7, the non-magnetic drill pipe 7 provides a non-magnetic environment for the while-drilling measurement device to accurately measure, and the outer tube is connected with a coring drilling tool 5; while drilling, the device can realize the measurement of the hole direction and the coring at the same time.

[0031] Specifically, in the description of the borehole direction finding device, the spear head 1 is installed at the top of the device, which is convenient for connecting with the rope fisher, and the device is taken out of the ground when the coring tube in the coring inner tube assembly 4 is full of rock core; the measuring probe tube is installed in the measuring short section 2.1, which is used for measuring the direction of the hole; the centralizer 2.2 ensures the coaxiality of the measuring device and the drill pipe, and the centralizer 2.2 has damping springs, which play a buffering and damping role; the guide directional assembly 2.5 guides and positions the measuring assembly, and ensures that the angle between the while-drilling measuring assembly 2 and the reference surface of the drill bit remains unchanged; the coring inner tube assembly 4 has a coring inner tube, which collects rock core when drilling while coring, and the fishing barrel assembly 3 connects the coring inner tube assembly 4 and ensures that the coring inner tube is taken out together when it is taken out.

[0032] The borehole direction finding device described above can measure the direction information of the borehole while coring drilling, greatly improving the drilling efficiency.

[0033] In addition, the while-drilling measuring assembly 2 is also provided with an extension rod 2.3 and a connecting joint 2.4; the guide directional assembly 2.5 is connected with the connecting joint 2.4, and the guide directional assembly 2.5 is used for guiding and positioning with the positioning guide sleeve 6. At the same time, the guide directional assembly 2.5 also has a device for preventing the seat key from being out of position, which ensures that the measuring device is completely in place.

[0034] In the embodiment, the while-drilling measuring assembly 2 mainly includes the measuring short section 2.1, the centralizer 2.2, the extension rod 2.3, the connecting joint 2.4 and the guide directional assembly 2.5. The length of the extension rod 2.3 can be determined according to the requirement of preventing magnetic interference. The guide directional assembly 2.5 is connected with the connecting joint 2.4, and the connecting joint 2.4 has a water inlet 2.4.1.

[0035] Further, the connecting joint 2.4 is provided with the water inlet 2.4.1, and the guide directional assembly 2.5 is used for guiding and positioning with the helical guide sleeve 6.1 which is fixedly welded in the positioning guide sleeve 6. The guide directional assembly 2.5 includes a one-way adjusting valve 2.5.7 which communicates with the water inlet 2.4.1.

[0036] In the embodiment, the guide directional assembly 2.5 is guided and positioned with the helical guide sleeve 6.1 in the directional guide sleeve 6, and the helical guide sleeve 6.1 is welded in the inner wall of the shell of the directional guide sleeve 6 as a sleeve structure. The one-way adjusting valve 2.5.7 ensures that the flushing liquid at the upper end can only flow out through the water inlet 2.4.1 and then through the one-way adjusting valve 2.5.7.

[0037] Further, the guide directional assembly 2.5 also includes a piston shaft 2.5.1 and a sealing piston 2.5.2, the piston shaft 2.5.1 is provided with a through hole, and the sealing piston 2.5.2 is arranged in the piston shaft 2.5.1.

[0038] In the embodiment, the piston shaft 2.5.1 and the one-way adjusting valve 2.5.7 are both provided with through holes, and the piston shaft 2.5.1 is connected with the connecting joint 2.4 through threads. The outer part of the piston shaft 2.5.1 is sealed by the sealing piston 2.5.2, so that the flushing liquid at the upper end can only flow out through the water inlet 2.4.1, the through hole of the piston shaft 2.5.1 and the one-way adjusting valve 2.5.7.

[0039] In the embodiment, the piston shaft 2.5.1 and the one-way adjusting valve 2.5.7 are both provided with through holes, and the piston shaft 2.5.1 is connected with the connecting joint 2.4 through threads. The outer part of the piston shaft 2.5.1 is sealed by the sealing piston 2.5.2, so that the flushing liquid at the upper end can only flow out through the water inlet 2.4.1, the through hole of the piston shaft 2.5.1 and the one-way adjusting valve 2.5.7.

[0040] Further, the guide directional assembly 2.5 further comprises a positioning guide shoe 2.5.3 between the piston shaft 2.5.1 and the first end of the one-way adjusting valve 2.5.7, and the positioning guide shoe 2.5.3 is provided with a control assembly in communication with the water inlet 2.4.1 and the one-way adjusting valve 2.5.7 at two ends, and the control assembly is used to guide the water inlet 2.4.1 and the one-way adjusting valve 2.5.7 to be in communication after the guide directional assembly 2.5 is in place.

[0041] In the embodiment, the control assembly is used to control whether the water inlet 2.4.1 at the upper half and the one-way adjusting valve 2.5.7 at the lower half are in communication or not. The positioning guide shoe 2.5.3 is the main structure of the guide directional assembly 2.5, one end of which is connected with the piston shaft 2.5.1, the other end is a guide end, the surface of which is guided and positioned by the directional guide sleeve 6, and the inner hole of which is provided with the one-way adjusting valve 2.5.7, so as to ensure that the flushing liquid can flow out after entering from the water inlet 2.4.1 (flowing out from the water outlet 3.1.1 described below).

[0042] For example, the positioning guide shoe 2.5.3 is provided with a first water inlet 2.5.3.1 in communication with the water inlet 2.4.1, a second water inlet 2.5.3.2 in communication with the one-way adjusting valve 2.5.7, and a third water inlet 2.5.3.3 in communication with the first water inlet 2.5.3.1 and the second water inlet 2.5.3.2, and the control assembly comprises a pressure maintaining valve core 2.5.5, a first compression spring 2.5.4 and a steel ball 2.5.6 installed in the third water inlet 2.5.3.3; when the guide directional assembly 2.5 is not in place, the first compression spring 2.5.4 pushes the steel ball 2.5.6 to block the third water inlet 2.5.3.3; when the guide directional assembly 2.5 is in place, the pressure maintaining valve core 2.5.5 is used to push the steel ball 2.5.6 to open the third water inlet 2.5.3.3 after being affected by the spiral guide sleeve 6.1.

[0043] In this embodiment, a pressure retaining valve core 2.5.5 is installed in the positioning guide shoe 2.5.3. Before the measuring device is in place, the pressure retaining valve core 2.5.5 and the steel ball 2.5.6 are lifted by the first compression spring 2.5.4, so that the flow passage between the piston shaft 2.5.1 and the one-way adjusting valve 2.5.7 is blocked, and the flushing liquid cannot pass through. Under the action of the sealing piston 2.5.2, the flushing liquid drives the device to quickly drop; after the device is in place, the positioning guide shoe 2.5.3 is guided and positioned with the guide positioning assembly 2.5, the pressure retaining valve core 2.5.5 is pressed down, the steel ball 2.5.6 moves down, and the flow passage between the piston shaft 2.5.1 and the one-way adjusting valve 2.5.7 is opened, so that the flushing liquid can pass through.

[0044] Specifically, the piston shaft 2.5.1 is installed at the uppermost of the positioning guide shoe 2.5.3, and two sealing pistons 2.5.2 are installed thereon to ensure that the flushing liquid coming from above can only pass through the water inlet 2.4.1. The one-way adjusting valve 2.5.7 is installed below the positioning guide shoe 2.5.3. The steel ball 2.5.6 and the pressure retaining valve core 2.5.5 are installed in the middle of the positioning guide shoe 2.5.3. When the guide positioning assembly 2.5 and the directional guide sleeve 6 have not completed the guide positioning, the steel ball 2.5.6 and the pressure retaining valve core 2.5.5 move radially outward under the action of the first compression spring 2.5.4, the steel ball 2.5.6 blocks the third water inlet 2.5.3.3, and the flushing liquid coming from the water inlet 2.4.1 cannot pass through the first water inlet 2.5.3.1. Under the combined action of the sealing piston 2.5.2, the pressure of the flushing liquid increases, and the device is quickly dropped. After the device is in place, the directional guide shoe 2.5.3 completes the guide positioning with the helical guide sleeve 6.1, the pressure retaining valve core 2.5.5 and the steel ball 2.5.4 are pressed down, the shaft diameter of the pressure retaining valve core 2.5.5 is smaller than the hole diameter of the second water inlet 2.5.3.2, the flushing liquid can flow through the gap between the holes, the first water inlet 2.5.3.1 and the second water inlet 2.5.3.2 are connected, and the flushing liquid can finally flow out from the water outlet 3.1.1.

[0045] It should be noted that at the moment when the device is in place, the pressure of the drilling rig head will have a sudden change, which will become smaller or larger. Whether the device is in place can be judged by monitoring the pressure change or the circulation of the flushing liquid.

[0046] Further, the second compression spring 2.5.8 and the positioning nut 2.5.9 for axially positioning the second compression spring 2.5.8 are arranged between the positioning guide shoe 2.5.3 and the second end of the one-way adjusting valve 2.5.7.

[0047] In the embodiment, the guiding directional assembly 2.5 includes a piston shaft 2.5.1, a sealing piston 2.5.2, a positioning guide shoe 2.5.3, a first compression spring 2.5.4, a pressure maintaining valve core 2.5.5, a steel ball 2.5.6, a one-way adjusting valve 2.5.7, a second compression spring 2.5.8, a positioning nut 2.5.9, etc. To reduce the instantaneous impact force when the device is in place, the second compression spring 2.5.8 is installed between the one-way adjusting valve 2.5.7 and the directional guide shoe 2.5.3, and the positioning nut 2.5.9 axially positions the second compression spring 2.5.8. The coring inner tube assembly 4 has a snap structure for axial positioning of the coring inner tube assembly 4, the guiding directional assembly 2.5 is used for axial positioning of the measurement-while-drilling assembly 2, and the presence of the second compression spring 2.5.8 can play a role in reducing vibration.

[0048] In the embodiment, the guiding directional assembly 2.5 includes a piston shaft 2.5.1, a sealing piston 2.5.2, a positioning guide shoe 2.5.3, a first compression spring 2.5.4, a pressure maintaining valve core 2.5.5, a steel ball 2.5.6, a one-way adjusting valve 2.5.7, a second compression spring 2.5.8, a positioning nut 2.5.9, etc. To reduce the instantaneous impact force when the device is in place, the second compression spring 2.5.8 is installed between the one-way adjusting valve 2.5.7 and the directional guide shoe 2.5.3, and the positioning nut 2.5.9 axially positions the second compression spring 2.5.8. The coring inner tube assembly 4 has a snap structure for axial positioning of the coring inner tube assembly 4, the guiding directional assembly 2.5 is used for axial positioning of the measurement-while-drilling assembly 2, and the presence of the second compression spring 2.5.8 can play a role in reducing vibration.

[0049] It is necessary to emphasize again that the guiding directional assembly 2.5 can ensure that the angle between the measurement-while-drilling assembly 2 and the reference surface of the drill bit remains unchanged during drilling, and the presence of the pressure maintaining valve core 2.5.5 ensures that the flushing fluid has sufficient pressure to lower the device into place. To reduce the frictional resistance between the centralizer 2.2 and the inner wall of the drill pipe during the lowering process of the device, the material of the centralizer 2.2 can be selected from polyoxymethylene or polyurethane. To ensure the pressure of the flushing fluid at the rear end of the drilling tool, the hole diameters of the first water passage 2.5.3.1, the second water passage 2.5.3.2, and the third water passage 2.5.3.3 need to be reasonably designed to ensure that the pressure drop of the guiding directional assembly 2.5 is not too large.

[0050] In addition, the fishing socket assembly 3 includes a fishing socket body 3.1 connected with the measurement-while-drilling assembly 2 and the coring inner tube assembly 4 at both ends, respectively, and the fishing socket body 3.1 is provided with a water outlet 3.1.1 in communication with the one-way adjusting valve 2.5.7.

[0051] In the embodiment, the one-way adjusting valve 2.5.7 is connected with the fishing socket assembly 3, and the through holes on the one-way adjusting valve 2.5.7 are all water passages. After the device is lowered into place, the flushing fluid passes through the water inlet 2.4.1, the first water passage 2.5.3.1, the third water passage 2.5.3.3, the second water passage 2.5.3.2, and the one-way adjusting valve 2.5.7 in sequence, and is then discharged by the water outlet 3.1.1.

[0052] Further, the fishing socket assembly 3 further includes a fishing hook 3.2 arranged on the fishing socket body 3.1, and the fishing hook 3.2 fixes the coring inner tube assembly 4.

[0053] In the embodiment, the core tube assembly 4 and the fishing barrel assembly 3 are non-rigidly connected, the drilling trajectory may be curved in the horizontal coring drilling process, the bending stress of the device is reduced, and the reliability and service life of the device are improved.

[0054] In the embodiment, the core tube assembly 4 and the fishing barrel assembly 3 are non-rigidly connected, the drilling trajectory may be curved in the horizontal coring drilling process, the bending stress of the device is reduced, and the reliability and service life of the device are improved.

[0055] For example, the fishing barrel assembly 3 further comprises a positioning pin 3.3 and a third compression spring 3.4 arranged on the fishing barrel body 3.1, the fishing hook 3.2 is movably arranged on the positioning pin 3.3, and the third compression spring 3.4 pushes the fishing hook 3.2 to tightly hold the fishing spear head of the core tube assembly 4.

[0056] In the embodiment, the fishing barrel assembly 3 comprises a fishing barrel body 3.1, a fishing hook 3.2, a positioning pin 3.3 and a third compression spring 3.4. The fishing barrel body 3.1 is connected with the one-way adjusting valve 2.5.6 and has a water outlet 3.1.1. The two fishing hooks 3.2 are connected on the fishing barrel body 3.1 through the positioning pin 3.3, the fishing hook 3.2 can rotate around the positioning pin 3.3, and under the action of the third compression spring 3.4, the two fishing hooks 3.2 form a claw-shaped structure to tightly hold the fishing spear head (a component similar to the fishing spear head 1) on the core tube assembly 4, thereby connecting the core tube assembly 4 with the MWD assembly 2.

[0057] It should be noted that the core tube assembly 4 is a mature product and does not need to be improved in design, and can be directly used in the device, that is, the structure of the present application is simple, and the core tube assembly 4 does not need to be improved in any way, and can be directly connected with the MWD device; the specific structure of the core tube assembly 4 can refer to the prior art, and will not be described here.

[0058] It should be noted that in the present specification, the relationship terms such as first and second are only used to distinguish one entity from another entity, and do not necessarily require or imply any such actual relationship or order between the entities.

[0059] The drilling direction finding device provided by the present application is described in detail above. The principles and implementation modes of the present application are described by applying specific examples in this paper, and the above description of the embodiments is only used to help understand the method of the present application and its core idea. It should be pointed out that for ordinary skilled persons in the technical field, some improvements and modifications can be made to the present application without departing from the principles of the present application, and these improvements and modifications also fall within the protection scope of the claims of the present application.

Claims

1. A borehole orientation finding device, characterized in that, The assembly includes, in sequence, a retrieval spearhead (1), a measurement-while-drilling (MWD) assembly (2), a retrieval tube assembly (3), and a core tube assembly (4). The MWD assembly (2) and the core tube assembly (4) are connected through the retrieval tube assembly (3). The MWD assembly (2) is equipped with a measurement sub (2.1), a stabilizer (2.2), and a guide and orientation assembly (2.5). The measurement while drilling assembly (2) is also provided with an extension rod (2.3) and a connecting joint (2.4); the guide orientation assembly (2.5) is connected to the connecting joint (2.4), and the guide orientation assembly (2.5) is used to guide and position the positioning lead sleeve (6); The connecting joint (2.4) is provided with a water inlet (2.4.1), and the guiding and directional assembly (2.5) is used to guide and position the spiral sleeve (6.1) welded and fixed in the positioning sleeve (6). The guiding and directional assembly (2.5) includes a one-way adjustment valve (2.5.7) connected to the water inlet (2.4.1). The guide orientation assembly (2.5) further includes a piston shaft (2.5.1) and a sealing piston (2.5.2), wherein the piston shaft (2.5.1) is provided with a through hole, and the sealing piston (2.5.2) is installed on the piston shaft (2.5.1). The guided orientation assembly (2.5) further includes a positioning guide shoe located between the first end of the piston shaft (2.5.1) and the one-way adjusting valve (2.5.7). 2.5.3), the positioning guide shoe (2.5.3) is provided with a control component at both ends that are respectively connected to the water inlet (2.4.1) and the one-way adjustment valve (2.5.7). The control component is used to connect the water inlet (2.4.1) and the one-way adjustment valve (2.5.7) after the guide orientation assembly (2.5) is in place. The positioning guide shoe (2.5.3) is provided with a first water inlet (2.5.3.1) connected to the water inlet (2.4.1), a second water inlet (2.5.3.2) connected to the one-way regulating valve (2.5.7), and a connection to the first water inlet (2.4.1). 2.5.3.1) and the third inlet of the second inlet (2.5.3.2) 2.5.3.3), the control component includes a pressure-holding valve core (2.5.5) and a valve installed at the third water inlet ( 2.5.3.3) First compression spring (2.5.4) and steel ball (2.5.6); when the guide orientation assembly (2.5) is not in place, the first compression spring (2.5.4) pushes the steel ball (2.5.6) to block the third water inlet (2.5.3.3); when the guide orientation assembly (2.5) is in place, the pressure holding valve core (2.5.5) is used to push the steel ball (2.5.6) to open the third water inlet (2.5.3.3) after being acted upon by the spiral sleeve (6.1).

2. The borehole direction finding device according to claim 1, characterized in that, A second compression spring (2.5.8) and a positioning nut (2.5.9) for axially positioning the second compression spring (2.5.8) are provided between the second end of the positioning guide shoe (2.5.3) and the one-way adjustment valve (2.5.7).

3. The borehole direction finding device according to claim 1 or 2, characterized in that, The retrieval tube assembly (3) includes a retrieval tube body (3.1) with both ends connected to the drilling measurement assembly (2) and the core tube assembly (4) respectively. The retrieval tube body (3.1) is provided with an outlet (3.1.1) that is connected to the one-way adjustment valve (2.5.7).

4. The borehole direction finding device according to claim 3, characterized in that, The retrieval tube assembly (3) also includes a retrieval hook (3.2) installed on the retrieval tube body (3.1), and the retrieval hook (3.2) fixes the core-taking inner tube assembly (4).

5. The borehole direction finding device according to claim 4, characterized in that, The retrieval tube assembly (3) also includes a positioning pin (3.3) and a third compression spring (3.4) disposed on the retrieval tube body (3.1). The retrieval hook (3.2) is movably mounted on the positioning pin (3.3). The third compression spring (3.4) pushes the retrieval hook (3.2) to hug and fix the retrieval spearhead of the core-taking inner tube assembly (4).

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