Down-the-hole static penetration probe

Abstract

This invention relates to the field of offshore exploration technology, and more particularly to a down-the-hole (DWT) static cone penetrometer (PCP), comprising: an outer casing of the drill string, with its interior extending vertically along the axial direction; a drill bit that can be opened or closed, located at the lower end of the outer casing; a probe, located inside the outer casing and above the drill bit; a probe drive mechanism, located inside the outer casing and driving the probe to move vertically; when the probe moves downward to contact the drill bit, the drill bit opens and passes through it; when the probe moves upward to leave the drill bit, the drill bit closes; and a drill string drive mechanism, driving the outer casing to rotate. By combining the PCP and the drilling string into one unit, after completing a single cycle of PCP testing in the borehole, drilling can proceed directly using the drill bit. After drilling is completed, the next PCP test can be performed in the same spot, and this cycle can be repeated until the designed borehole depth for the PCP test is reached. This significantly saves considerable auxiliary time for tripping the drill string and the PCP, greatly improving operational efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of offshore exploration, and in particular to a down-the-hole static penetration probe. Background Art

[0002] At present, there are two types of static penetration tests for in-situ testing of offshore exploration: seabed static penetration test and underground static penetration test.

[0003] Seabed static penetration testing uses a lifting device on an offshore exploration platform or an offshore exploration ship to lower the seabed static penetration tester to the seabed. The deadweight provides a balanced penetration reaction force, and the double-wheel or oil cylinder drives the probe rod to penetrate the probe into the formation to achieve a static penetration test. Seabed static penetration testing does not require drilling equipment such as drilling rigs. The double-wheel type can penetrate continuously, is easy to operate, and has high operating efficiency. However, it is suitable for a single formation and is only suitable for relatively homogeneous soil layers. When soft and hard layers appear in the formation, the probe cannot pass through the hard layer and cannot test the formation below the hard layer. In addition, the probe is easy to break when it encounters a hard layer. In addition, the signal cable passes through the axial hole of each probe rod, which makes it inconvenient to load and unload the probe rod.

[0004] Downhole static penetration testing is to lower the static penetration device into the borehole through the drilling rig and the drill pipe (casing). The deadweight of the seabed base provides a balanced penetration reaction force, and the oil cylinder drives the probe into the formation to complete the first single-pass static penetration test. The single-pass penetration length is about 3 meters. Then the static penetration device is pulled out of the hole, and the drilling tool is lowered to drill and clean the formation of the static penetration test. The drilling footage is 2.5 meters. Then the drilling tool is pulled out, and the static penetration device is lowered into the hole for the second single-pass static penetration test. This cycle is repeated until the designed hole depth is reached, and the in-situ static penetration test of the hole is completed. Downhole static penetration test is applicable to a wide range of strata and is not affected by the hardness or softness of the strata. It can complete static penetration test of larger hole depths. However, each single static penetration test requires raising and lowering the static penetration device once and raising and lowering the drill bit once. The auxiliary time for raising and lowering the static penetration device and drill bit greatly exceeds the time required for the test itself, which is inefficient. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide a down-the-hole static penetration probe that can realize both static penetration and drilling, so as to overcome the above-mentioned defects of the prior art.

[0006] In order to solve the above technical problems, the present invention adopts the following technical solutions: a down-the-hole static probe, comprising: a drill tool outer tube, the interior of which is axially penetrated up and down; a drill bit that can be opened or closed, arranged at the lower end of the drill tool outer tube; a probe, arranged inside the drill tool outer tube and located above the drill bit; a probe driving component, arranged inside the drill tool outer tube and driving the probe to move up and down, when the probe moves downward and contacts the drill bit, the drill bit opens and passes through the drill bit, and when the probe moves upward and leaves the drill bit, the drill bit closes; and a drill tool driving component, driving the drill tool outer tube to rotate.

[0007] Preferably, it also includes: a base tube, the interior of which is axially connected up and down; a diverter, arranged inside the base tube, and a first oil channel and a second oil channel independent of each other are formed inside the diverter; a reversing valve, arranged inside the base tube, the reversing valve has an input port for connecting to the hydraulic pipe in the umbilical cable, a first interface connecting to the first oil channel and a second interface connecting to the second oil channel; the probe driving component is a hydraulic cylinder, the hydraulic cylinder includes a rodless chamber, a rod chamber and a piston rod, the upper end of which is located in the rod chamber and the lower end of which is connected to the probe, the rodless chamber and the rod chamber are respectively connected to the first oil channel and the second oil channel.

[0008] Preferably, the flow diverter comprises an inner hollow shell and a core shaft rotatably sleeved inside the shell, the drill driving member is arranged inside the base tube and connected to the upper end of the core shaft, and the lower end of the core shaft is connected to the upper end of the drill outer tube.

[0009] Preferably, the drilling tool driving component is a hydraulic motor, and the reversing valve further has a third interface and a fourth interface respectively connected to the oil inlet and the oil outlet of the hydraulic motor.

[0010] Preferably, a first oil port connected to the first interface and a second oil port connected to the second interface are provided on the outer shell, the first oil channel and the second oil channel are both arranged in the core shaft, the upper end of the first oil channel and the upper end of the second oil channel are respectively connected to the first oil port and the second oil port, the lower end of the first oil channel and the lower end of the second oil channel both pass through the lower end surface of the core shaft and are respectively connected to the rodless cavity and the rod cavity.

[0011] Preferably, a drill joint for closing the upper end of the drill outer tube is provided at the upper end of the drill outer tube, and the lower end of the mandrel passes through the drill joint and is fixedly connected to the drill joint.

[0012] Preferably, the reversing valve, the drill driving component and the outer shell all have a spacing space from the base tube, a slurry inlet is opened on the outer shell, a slurry channel is provided in the core shaft, the upper end of the slurry channel is connected to the slurry inlet, the lower end of the slurry channel passes through the lower end face of the core shaft, and the probe driving component, the probe and the drill bit all have a spacing space from the outer tube of the drill tool.

[0013] Preferably, a detection member for detecting the displacement of the piston rod is provided inside the outer tube of the drilling tool, the detection member is connected to a detection signal cable, a slip ring is installed at the lower end of the core shaft, the slip ring includes a fixed end and a rotating end which are respectively circumferentially slidably matched and fixedly matched with the core shaft, the detection signal cable is connected to the rotating end, and the fixed end is connected to the signal cable in the umbilical cable.

[0014] Preferably, a lower joint is provided at the lower end of the base tube to close the lower end of the base tube, the core shaft can be rotatably passed through the lower joint along the circumferential direction, the slip ring is located between the lower end of the shell and the lower joint, and a cable channel is provided in the core shaft for the detection signal cable to pass through.

[0015] Preferably, an upper joint for closing the upper end of the base tube is provided at the upper end of the base tube, and a socket for the umbilical cable to pass through is provided on the upper joint.

[0016] Compared with the prior art, the present invention has significant improvements:

[0017] The down-the-hole static penetration tester of the present invention combines the static penetration tester and the drilling tool into one. After completing a single static penetration test in the hole, there is no need to pull out the static penetration tester and the drill tool. The formation of the static penetration test of this round can be directly drilled through the drill bit, and the next static penetration test can be carried out in situ after the drilling is completed. The cycle is repeated until the designed hole depth of the static penetration test is reached. The disadvantage of the existing downhole static penetration test that the static penetration tester and the drilling tool need to be repeatedly pulled out and lowered into the hole is overcome, and a large amount of auxiliary time for raising and lowering the drill tool and the static penetration tester can be saved, thereby greatly improving the working efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a partial cross-sectional schematic diagram of a down-the-hole static probe while drilling according to an embodiment of the present invention.

[0019] Figure 2 yes Figure 1 Enlarged schematic diagram of part a in the middle.

[0020] Figure 3 yes Figure 1 Enlarged schematic diagram of part b in the middle.

[0021] Figure 4 yes Figure 1 Enlarged schematic diagram of part c in the middle.

[0022] Figure 5 yes Figure 3 Schematic diagram of the cross section at AA in the middle.

[0023] Figure 6 yes Figure 3 Schematic diagram of the cross section at BB in the middle.

[0024] Figure 7yes Figure 3 Schematic diagram of the cross section at CC.

[0025] Figure 8 yes Figure 3 Schematic diagram of the cross section at DD in the middle.

[0026] Fig. 9 yes Figure 3 Schematic diagram of the cross section at EE.

[0027] Fig.10 yes Figure 4 Schematic diagram of the cross section at FF.

[0028] Fig.11 It is a schematic diagram of the use of the down-the-hole static probe while drilling according to an embodiment of the present invention.

[0029] The reference numerals are described as follows:

[0030] 100 DTH Static Penetrator 11 First Oil Pipe Joint

[0031] 1 Drilling tool outer tube 12 Second oil pipe

[0032] 2 Drill bit 13 Second oil pipe joint

[0033] 201 Wing 14 Third oil pipe

[0034] 3 Probe 15 Fourth oil pipe

[0035] 4 Probe drive 16 Drill tool joint

[0036] 41 Piston rod 17 Detection signal cable

[0037] 42 Flange Seat 18 Slip Ring

[0038] 43 Bolt 181 Fixed end

[0039] 44 Flange 182 Rotating end

[0040] 45 connecting hole 19 lower joint

[0041] 5 Drill driver 20 Base sleeve

[0042] 6 Base tube 21 Screw

[0043] 7 Diverter 22 First sealing ring

[0044] 701 First oil channel 23 Second sealing ring

[0045] 702 Second oil passage 24 Third sealing ring

[0046] 703 slurry channel 25 fourth sealing ring

[0047] 704 Cable channel 26 Connector

[0048] 71 Shell 27 Inflatable connector

[0049] 711 First oil port 28 upper connector

[0050] 712 Second oil port 29 Cable

[0051] 713 Slurry inlet 01 controller

[0052] 72 Mandrel 02 Base

[0053] 720 Mandrel End Cap 03 Casing Chuck

[0054] 721 first annular groove 04 sleeve

[0055] 722 Second Annular Groove 05 Seabed

[0056] 723 Third annular groove 06 drill rod

[0057] 73 bearing 07 wave compensation drilling rig power head

[0058] 8 Directional valve 08 Drill pipe chuck

[0059] 81 Input 09 Umbilical cable winch

[0060] 82 First interface 010 Hydraulic power system control cabinet

[0061] 83 Second interface 011 Heave compensation drilling rig winch

[0062] 84 Third interface 012 Mud pump

[0063] 85 Fourth Interface 013 Mud Pool

[0064] 9 Umbilical Cable 014 Exploration Vessel

[0065] 10 The first oil pipe 015 drilling hole wall DETAILED DESCRIPTION

[0066] The specific embodiments of the present invention are further described in detail below in conjunction with the accompanying drawings. These embodiments are only used to illustrate the present invention, but not to limit the present invention.

[0067] In the description of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0068] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0069] Furthermore, in the description of the present invention, unless otherwise specified, “plurality” means two or more.

[0070] like Figures 1 to 11 As shown, an embodiment of the down-the-hole static penetration probe of the present invention.

[0071] See also Figures 1 to 4 The down-the-hole static penetration probe 100 of this embodiment includes a drill tool outer tube 1, a drill bit 2, a probe 3, a probe driver 4 and a drill tool driver 5. The interior of the drill tool outer tube 1 is axially connected up and down. The drill bit 2 is a drill bit that can be opened or closed. The drill bit 2 is arranged at the lower end of the drill tool outer tube 1. The drill bit 2 is fixedly connected to the lower end of the drill tool outer tube 1 by threaded fit. The probe 3 is arranged inside the drill tool outer tube 1 and is located above the drill bit 2. The probe driver 4 is arranged inside the drill tool outer tube 1 and drives the probe 3 to move up and down. When the probe 3 moves downward and contacts the drill bit 2, the drill bit 2 opens and passes through the drill bit 2. When the probe 3 moves upward and leaves the drill bit 2, the drill bit 2 closes. The drill tool driver 5 drives the drill tool outer tube 1 to rotate, and when the drill tool outer tube 1 rotates, the drill bit 2 is driven to rotate synchronously therewith.

[0072] During use, the probe 3 is driven downward by the probe driving member 4, so that the probe 3 pushes the drill bit 2 and passes through the drill bit 2, and the probe 3 can be penetrated into the formation to realize the static penetration test; after completing one static penetration test, the probe 3 is driven upward by the probe driving member 4, so that the probe 3 is retracted into the inner part of the drill tool outer tube 1 and leaves the drill bit 2, so that the drill bit 2 can be restored to close, and then the drill tool driving member 5 drives the drill tool outer tube 1 to drive the drill bit 2 to rotate, and at the same time, the down-the-hole static penetration probe 100 is lowered as a whole, so that the drill bit 2 can be rotated downward to drill to the set depth of the formation that has been tested by the probe 3; after completing one drilling, the drill tool driving member 5 stops driving the drill tool outer tube 1 and the drill bit 2 to rotate, and the probe driving member 4 drives the probe 3 downward again to carry out the next static penetration test; and the cycle is repeated until the designed hole depth of the static penetration test is reached.

[0073] Therefore, the down-the-hole static penetration tester 100 of this embodiment combines the static penetration tester and the drilling tool into one. After completing a single static penetration test in the hole, there is no need to pull out the static penetration tester and the drill tool. The formation of the static penetration test can be directly drilled through the drill bit 2, and the next static penetration test can be carried out in situ after the drilling is completed. The cycle is repeated until the designed hole depth of the static penetration test is reached. The disadvantage of the existing downhole static penetration test that the static penetration tester and the drill tool need to be repeatedly pulled out and lowered into the hole is overcome, and a large amount of auxiliary time for lifting and lowering the drill tool and the static penetration tester can be saved, thereby greatly improving the working efficiency.

[0074] In this embodiment, see Figure 4 The drill bit 2 may include two fins 201 that can be relatively opened or closed. The upper ends of the two fins 201 are respectively hinged on the drill body of the drill bit 2. The lower ends of the two fins 201 are relatively arranged. The lower ends of the two fins 201 are kept in a relatively closed state by the elastic force of an elastic structure (such as a spring), forming a full-section drilling drill bit. When the probe 3 moves downward to contact the drill bit 2, it can overcome the elastic force of the elastic structure to push open the lower ends of the two fins 201 that are relatively closed, so that the drill bit 2 opens and passes through the two fins 201; when the probe 3 moves upward to leave the drill bit 2, the lower ends of the two fins 201 automatically recover and keep in a relatively closed state under the elastic force of the elastic structure.

[0075] See also Figures 1 to 4Preferably, the down-the-hole static penetration probe 100 of this embodiment further includes a base tube 6, a diverter 7 and a reversing valve 8. The inside of the base tube 6 is axially connected up and down. The diverter 7 is arranged inside the base tube 6, and a first oil passage 701 and a second oil passage 702 that are independent of each other are formed inside the diverter 7. The reversing valve 8 is arranged inside the base tube 6, and the reversing valve 8 has an input port 81 for connecting the hydraulic pipe in the umbilical cable 9, a first interface 82 connected to the first oil passage 701, and a second interface 83 connected to the second oil passage 702. The reversing valve 8 also has an oil return port (not shown in the figure) connected to the hydraulic pipe in the umbilical cable 9. The reversing of the reversing valve 8 can make the input port 81 connected to the first interface 82 and the oil return port connected to the second interface 83, or the input port 81 is connected to the second interface 83 and the oil return port is connected to the first interface 82, so that the hydraulic oil transported by the hydraulic pipe in the umbilical cable 9 can be transported to the first oil passage 701 or the second oil passage 702. The reversing valve 8 can preferably adopt an electromagnetic reversing valve. The probe driving member 4 is a hydraulic cylinder, which includes a rodless chamber, a rod chamber and a piston rod 41. The upper end of the piston rod 41 is located in the rod chamber, and the lower end of the piston rod 41 is connected to the probe 3. In this embodiment, preferably, the probe 3 and the hydraulic cylinder are coaxially arranged inside the drill tool outer tube 1, and the hydraulic cylinder is located above the probe 3, and the rodless chamber of the hydraulic cylinder is located above the rod chamber. A flange 44 can be provided on the outer peripheral surface of the hydraulic cylinder, and a flange seat 42 can be provided on the inner wall of the drill tool outer tube 1. The flange 44 and the flange seat 42 are fixedly connected by bolts 43, so that the hydraulic cylinder is fixedly installed on the inner wall of the drill tool outer tube 1. When the drill tool driving member 5 drives the drill tool outer tube 1 to rotate, the hydraulic cylinder and the probe 3 rotate synchronously therewith. The rodless chamber and rod chamber of the hydraulic cylinder are connected to the first oil passage 701 and the second oil passage 702 respectively. When oil comes in the first oil passage 701, the hydraulic oil enters the rodless chamber of the hydraulic cylinder, pushing the piston rod 41 to move downward, thereby driving the probe 3 to move downward. At this time, the hydraulic oil in the rod chamber of the hydraulic cylinder returns to the hydraulic pipe in the umbilical cable 9 through the second oil passage 702, the second interface 83 of the reversing valve 8 and the return oil port; when oil comes in the second oil passage 702, the hydraulic oil enters the rod chamber of the hydraulic cylinder, pushing the piston rod 41 to move upward, thereby driving the probe 3 to move upward. At this time, the hydraulic oil in the rodless chamber of the hydraulic cylinder returns to the hydraulic pipe in the umbilical cable 9 through the first interface 82 of the reversing valve 8 of the first oil passage 701 and the return oil port. In this embodiment, refer to Figure 4The rodless chamber of the hydraulic cylinder is connected to the first oil passage 701 through the first oil pipe 10, and the first oil pipe 10 and the first oil passage 701 can be connected through the first oil pipe joint 11; the rod chamber of the hydraulic cylinder is connected to the second oil passage 702 through the second oil pipe 12, and the second oil pipe 12 and the second oil passage 702 can be connected through the second oil pipe joint 13. There is a spacing space between the hydraulic cylinder and the drill tool outer tube 1, and the first oil pipe joint 11, the first oil pipe 10, the second oil pipe joint 13 and the second oil pipe 12 are all arranged in the spacing space between the hydraulic cylinder and the drill tool outer tube 1.

[0076] See also Figure 3 Preferably, the flow diverter 7 includes an outer shell 71 with a hollow interior and a core shaft 72 which is rotatably sleeved inside the outer shell 71 in the circumferential direction. The core shaft 72 is preferably rotatably supported on the inner wall of the outer shell 71 through a bearing 73. The drill tool driving member 5 is arranged inside the base tube 6 and connected to the upper end of the core shaft 72. The lower end of the core shaft 72 is connected to the upper end of the drill tool outer tube 1. The drill tool driving member 5 drives the core shaft 72 to rotate relative to the outer shell 71, and the core shaft 72 drives the drill tool outer tube 1 to rotate synchronously therewith. Therefore, when the drill tool driving member 5 drives the drill tool outer tube 1 and the drill bit 2 to rotate and drill, the base tube 6 and the outer shell 71 of the flow diverter 7 do not rotate.

[0077] Preferably, see Figure 2 and Figure 3 In this embodiment, the drilling tool driving component 5 is a hydraulic motor, and the reversing valve 8 also has a third interface 84 and a fourth interface 85 respectively connected to the oil inlet and the oil outlet of the hydraulic motor. The reversing of the reversing valve 8 can also make the input port 81 of the reversing valve 8 communicate with the third interface 84 and the return oil port of the reversing valve 8 communicate with the fourth interface 85. Hydraulic oil is delivered to the hydraulic motor through the input port 81 and the third interface 84, so that the hydraulic motor drives the core shaft 72 to drive the drilling tool outer tube 1 to rotate, and the return oil of the hydraulic motor is returned to the hydraulic pipe in the umbilical cable 9 through the fourth interface 85 and the return oil port.

[0078] In this embodiment, see Figure 2 and Figure 3 The drill driver 5 and the diverter 7 are coaxially arranged inside the base tube 6, and the drill driver 5 is located above the diverter 7. The reversing valve 8 is arranged inside the base tube 6 and above the drill driver 5, and the reversing valve 8 is fixedly supported on the inner wall of the base tube 6.

[0079] In this embodiment, see Figure 3A base sleeve 20 is provided in the base tube 6, and the base sleeve 20 is fixedly connected to the inner wall of the base tube 6 by threaded fitting, and the base sleeve 20 is axially penetrated up and down. The upper end of the outer shell 71 of the flow splitter 7 is covered with the lower end of the base sleeve 20, and the upper end of the mandrel 72 of the flow splitter 7 is covered with a mandrel end cap 720, and the mandrel end cap 720 is fixedly connected to the upper end of the mandrel 72 by threaded fitting, and the mandrel end cap 720 is covered with the lower end of the base sleeve 20 and has a gap with the base sleeve 20, and the bearing 73 is provided at the upper end of the mandrel 72 and is located below the mandrel end cap 720, and the lower end of the drill tool driving member 5 is covered with the upper end of the base sleeve 20, and the output shaft of the drill tool driving member 5 is fixedly connected to the upper end of the mandrel 72, and the output shaft of the drill tool driving member 5 and the upper end of the mandrel 72 can be connected by a key. The housing 71 , the base sleeve 20 and the drill driver 5 are connected and fixed by screws 21 , thereby achieving installation and fixation of the drill driver 5 and the diverter 7 in the base tube 6 .

[0080] Preferably, see Figure 2 and Figure 3 In this embodiment, the housing 71 of the diverter 7 is provided with a first oil port 711 and a second oil port 712. The first oil port 711 is connected to the first interface 82 of the reversing valve 8, and the first interface 82 of the reversing valve 8 can be connected to the first oil port 711 on the housing 71 through the third oil pipe 14. The second oil port 712 is connected to the second interface 83 of the reversing valve 8, and the second interface 83 of the reversing valve 8 can be connected to the second oil port 712 on the housing 71 through the fourth oil pipe 15. Figure 5 , Figure 6 and Figure 7 In this embodiment, there is a spacing space between the drill driver 5 and the outer shell 71 of the diverter 7 and the base tube 6, and there is also a spacing space between the base sleeve 20 and the base tube 6. The third oil pipe 14 and the fourth oil pipe 15 are both arranged in the spacing space between the drill driver 5, the base sleeve 20 and the outer shell 71 and the base tube 6. In order to adapt to the contour shape of the outer shell 71 and the base tube 6, preferably, the third oil pipe 14 and the fourth oil pipe 15 are both elliptical tubes. The first oil channel 701 and the second oil channel 702 are both arranged in the core shaft 72, and the first oil channel 701 and the second oil channel 702 extend along the axial direction of the core shaft 72. The upper end of the first oil channel 701 and the upper end of the second oil channel 702 are respectively connected to the first oil port 711 and the second oil port 712 on the outer shell 71, thereby connecting the first interface 82 and the second interface 83 of the reversing valve 8 respectively. See Figure 3 and Figure 6The outer circumferential surface of the core shaft 72 is provided with a first annular groove 721 extending along the circumferential direction of the core shaft 72 at the upper end of the first oil passage 701. The upper end of the first oil passage 701 is connected to the first annular groove 721. The first oil port 711 on the housing 71 is located on the outer circumferential side of the first annular groove 721 and is connected to the first annular groove 721, thereby connecting to the upper end of the first oil passage 701. Figure 3 and Figure 7 , a second annular groove 722 extending along the circumferential direction of the core shaft 72 is provided on the outer circumferential surface of the core shaft 72 at the upper end of the second oil passage 702, the upper end of the second oil passage 702 is communicated with the second annular groove 722, and the second oil port 712 on the housing 71 is located on the outer circumferential side of the second annular groove 722 and is communicated with the second annular groove 722, thereby being communicated with the upper end of the second oil passage 702. Therefore, when the core shaft 72 rotates relative to the housing 71, the first oil port 711 on the housing 71 remains connected to the upper end of the first oil passage 701 through the first annular groove 721, and the second oil port 712 remains connected to the upper end of the second oil passage 702 through the second annular groove 722. The lower end of the first oil passage 701 and the lower end of the second oil passage 702 both pass through the lower end surface of the core shaft 72 and are respectively communicated with the rodless chamber and the rod chamber of the probe drive component 4 (hydraulic cylinder). See. Figure 4 The lower end of the first oil passage 701 can be connected to the rodless chamber of the probe driving component 4 through the first oil pipe joint 11 and the first oil pipe 10, and the lower end of the second oil passage 702 can be connected to the rod chamber of the probe driving component 4 through the second oil pipe joint 13 and the second oil pipe 12.

[0081] In this embodiment, see Figure 3 The upper end of the drill tool outer tube 1 is provided with a drill tool joint 16 that closes the upper end of the drill tool outer tube 1, and the drill tool joint 16 and the upper end of the drill tool outer tube 1 can be fixedly connected by threaded fit. The lower end of the mandrel 72 passes through the drill tool joint 16 and is fixedly connected to the drill tool joint 16, and the lower end of the mandrel 72 and the drill tool joint 16 can be fixedly connected by threaded fit. When the mandrel 72 rotates, the drill tool joint 16 is driven to rotate accordingly, and the drill tool outer tube 1 is driven to rotate synchronously by the drill tool joint 16. The lower end of the mandrel 72 passes through the drill tool joint 16, so that the lower end of the first oil passage 701 and the lower end of the second oil passage 702 that pass through the lower end surface of the mandrel 72 are respectively connected to the rodless cavity and the rod cavity of the probe driving component 4 (hydraulic cylinder).

[0082] See also Figure 2 and Figure 3 In this embodiment, the reversing valve 8, the drilling tool driving member 5 and the outer shell 71 of the diverter 7 are separated from the base tube 6, and the base sleeve 20 is separated from the base tube 6. The separation spaces between the reversing valve 8, the drilling tool driving member 5, the base sleeve 20 and the outer shell 71 and the base tube 6 are interconnected to form a channel for mud to pass through. Figure 4There is a space between the probe driving member 4, the probe 3 and the drill bit 2 and the outer tube 1 of the drilling tool, and the spaces between the probe driving member 4, the probe 3 and the drill bit 2 and the outer tube 1 of the drilling tool are connected to each other. Figure 4 and Fig.10 In this embodiment, the flange 44 on the probe driving member 4 and the flange seat 42 on the inner wall of the drill tool outer tube 1 are provided with a communication hole 45, and the communication hole 45 connects the space between the probe driving member 4 and the drill tool outer tube 1 and the space between the probe 3 and the drill tool outer tube 1, forming a channel for mud to pass through. Figure 3 and Figure 8 The outer shell 71 is provided with a slurry inlet 713, and the core shaft 72 is provided with a slurry channel 703, which extends along the axial direction of the core shaft 72, and the slurry channel 703 is independent of the first oil channel 701 and the second oil channel 702, and the slurry channel 703 is a mud channel. The upper end of the slurry channel 703 is connected with the slurry inlet 713 on the outer shell 71, so as to be connected with the reversing valve 8, the drilling tool driving member 5 and the interval space between the outer shell 71 and the base tube 6. On the outer peripheral surface of the core shaft 72, at the upper end of the slurry channel 703, a third annular groove 723 extending along the circumference of the core shaft 72 is provided, and the upper end of the slurry channel 703 is connected with the third annular groove 723. The slurry inlet 713 on the outer shell 71 is located on the outer peripheral side of the third annular groove 723 and is connected with the third annular groove 723, so as to be connected with the upper end of the slurry channel 703. Therefore, when the core shaft 72 rotates relative to the outer shell 71, the pulp inlet 713 on the outer shell 71 remains connected to the upper end of the pulp channel 703. The lower end of the slurry channel 703 passes through the lower end face of the core shaft 72, and the lower end of the core shaft 72 passes through the drill tool joint 16. Therefore, the lower end of the slurry channel 703 is connected to the interval space between the probe driving member 4 and the drill tool outer tube 1 in the drill tool outer tube 1, so that the slurry channel 703 connects the channel in the base tube 6 for mud to pass through and the channel in the drill tool outer tube 1 for mud to pass through, so that the mud in the mud pool can enter the drill tool outer tube 1 from the base tube 6 through the slurry channel 703 and reach the drill bit 2. When the drill bit 2 is rotary drilling, the mud reaching the drill bit 2 can carry away the soil and rock chips formed by the rotary drilling of the drill bit 2 in the formation from the bottom of the drill bit 2, and return to the mud pool upward through the outer peripheral side of the drill tool outer tube 1, thereby completing the bottom hole cleaning, and the mud can protect the hole wall when passing through the bare hole wall along the way to prevent the hole wall from collapsing.

[0083] See also Figure 3In this embodiment, preferably, in order to ensure the sealing of the flow divider 7, a first sealing ring 22 is provided between the lower end of the drill driver 5 and the upper end of the base sleeve 20, between the upper end of the housing 71 and the lower end of the base sleeve 20, and between the lower end of the housing 71 and the mandrel 72, so that the lower end of the drill driver 5 and the upper end of the base sleeve 20, between the upper end of the housing 71 and the lower end of the base sleeve 20, and between the lower end of the housing 71 and the mandrel 72 are all sealed. A second sealing ring 23 is provided between the housing 71 and the mandrel 72, on the upper and lower sides of the first oil port 711 and the first annular groove 721, on the upper and lower sides of the second oil port 712 and the second annular groove 722, and on the upper and lower sides of the slurry inlet 713 and the third annular groove 723, so as to ensure the sealing of the first oil passage 701, the second oil passage 702, and the slurry passage 703 in the flow divider 7.

[0084] See also Figure 3 and Figure 4In this embodiment, preferably, a detection member (not shown in the figure) is provided inside the outer tube 1 of the drilling tool, and the detection member is used to detect the displacement of the piston rod 41 of the probe driving member 4. The detection member is connected to the detection signal cable 17. The lower end of the mandrel 72 of the diverter 7 is provided with a slip ring 18, and the slip ring 18 includes a fixed end 181 and a rotating end 182 that can rotate relative to the fixed end 181. The fixed end 181 and the rotating end 182 of the slip ring 18 are connected by signals, and the fixed end 181 of the slip ring 18 is circumferentially slidingly matched with the mandrel 72, and the rotating end 182 of the slip ring 18 is circumferentially fixedly matched with the mandrel 72. The detection signal cable 17 is connected to the rotating end 182 of the slip ring 18, and the fixed end 181 of the slip ring 18 is connected to the signal cable in the umbilical cable 9. The fixed end 181 of the slip ring 18 can be connected to the signal cable in the umbilical cable 9 through the cable 29. When the mandrel 72 rotates relative to the outer shell 71 of the diverter 7, the fixed end 181 of the slip ring 18 does not rotate with the mandrel 72 but remains stationary, and the cable 29 and the umbilical cable 9 connected to the fixed end 181 of the slip ring 18 do not rotate with the mandrel 72 either; the rotating end 182 of the slip ring 18 rotates synchronously with the mandrel 72, and the detection signal cable 17 connected to the rotating end 182 of the slip ring 18 rotates accordingly, thereby enabling the drill tool driving component 5 to drive the mandrel 72 to drive the drill tool outer tube 1 to rotate, and when the probe driving component 4 and the probe 3 rotate synchronously therewith, the detection component arranged in the drill tool outer tube 1 and the detection signal cable 17 connected to the detection component can also keep rotating synchronously therewith, and the detection signal of the detection component can be transmitted to the signal cable in the umbilical cable 9 through the detection signal cable 17, the slip ring 18 and the cable 29, so that it can be transmitted to the controller by the umbilical cable 9, so as to realize the real-time display, recording and storage of the detection signal of the detection component. When the piston rod 41 of the probe driving member 4 drives the probe 3 to move downward and the probe 3 is penetrated into the formation for a static penetration test, the displacement of the piston rod 41 of the probe driving member 4 is detected by the detection member, and the penetration amount of the probe 3 can be measured. Preferably, the detection member can be a laser rangefinder, which can be installed at the bottom of the probe driving member 4 (hydraulic cylinder).

[0085] In this embodiment, the probe 3 can also be connected to a probe signal cable, which can pass through the piston rod 41 and the rodless cavity of the probe driving component 4 (hydraulic cylinder) and then be aggregated with the detection signal cable 17 and connected together to the rotating end 182 of the slip ring 18.

[0086] In this embodiment, see 3 and Fig. 9The lower end of the base tube 6 is provided with a lower joint 19 that closes the lower end of the base tube 6. The lower joint 19 and the lower end of the base tube 6 can be fixedly connected by threaded fit. The mandrel 72 can be rotatably arranged in the circumferential direction through the lower joint 19. After passing through the lower joint 19, the mandrel 72 passes through the drill joint 16 and is fixedly connected to the drill joint 16. The lower joint 19 is located above the drill joint 16 and has a spacing distance between the drill joint 16. The slip ring 18 is arranged inside the drill outer tube 1 and between the lower end of the diverter 7 housing 71 and the lower joint 19. The mandrel 72 is provided with a cable channel 704 for the detection signal cable 17 to pass through. When the mandrel 72 rotates relative to the housing 71, the detection signal cable 17 passing through the cable channel 704 and the rotating end 182 of the slip ring 18 rotate synchronously with the mandrel 72, and the lower joint 19 and the base tube 6 are fixed. In this embodiment, the detection signal cable 17 and the probe signal cable connected to the bottom of the probe 3 both pass through the cable channel 704 and are commonly connected to the rotating end 182 of the slip ring 18, and the detection signal cable 17 and the probe signal cable are sealed against the side wall of the cable channel 704.

[0087] In this embodiment, see Figure 3 On the inner wall of the base tube 6, at a position corresponding to the lower end of the outer shell 71 of the diverter 7, a connecting piece 26 is provided which penetrates the inner wall of the base tube 6 in the axial direction. The connecting piece 26 is welded on the inner wall of the base tube 6, and the lower end of the outer shell 71 is sleeved inside the connecting piece 26. A third sealing ring 24 is provided between the lower end of the outer shell 71 and the connecting piece 26, and a fourth sealing ring 25 is provided between the core shaft 72 and the lower joint 19, so that a sealed annular cavity is formed between the core shaft 72, the base tube 6, the connecting piece 26 and the lower joint 19, and the slip ring 18 is provided in the sealed annular cavity. The cable 29 connected to the fixed end 181 of the slip ring 18 passes through the connecting piece 26 and is connected to the signal cable in the umbilical cable 9, and the cable 29 and the connecting piece 26 are sealed. The upper end of the first oil channel 701, the upper end of the second oil channel 702 and the upper end of the slurry channel 703 are all located above the connecting piece 26, that is, the first oil port 711, the second oil port 712 and the slurry inlet 713 on the outer shell 71 are all located above the connecting piece 26. Therefore, the mud in the mud pool can enter the slurry channel 703 after entering the base tube 6, and will not enter the sealing annular cavity where the slip ring 18 is located.

[0088] See also Figure 3 Preferably, an air filling joint 27 may be provided on the lower joint 19. After the assembly and debugging of the down-the-hole static probe 100 of the present embodiment is completed, the air filling joint 27 may be used to fill the sealed annular cavity where the slip ring 18 is located to perform a pressure test. After the test is completed, the air filling joint 27 needs to be replaced with a screw plug to seal the sealed annular cavity where the slip ring 18 is located before use.

[0089] In this embodiment, see Figure 2The upper end of the base tube 6 is provided with an upper joint 28 for closing the upper end of the base tube 6, and the upper joint 28 and the upper end of the base tube 6 can be fixedly connected by threaded fit. The interior of the upper joint 28 is axially penetrated up and down, so as to be connected with the interior of the base tube 6, and can be used to input mud into the base tube 6. The upper joint 28 is provided with a plug hole for the umbilical cable 9 to pass through, and the reversing valve 8 is located below the upper joint 28. After the umbilical cable 9 passes through the plug hole on the upper joint 28, the hydraulic pipe in the umbilical cable 9 is connected to the input port 81 of the reversing valve 8, and the signal cable in the umbilical cable 9 is connected to the cable 29. The cable 29 passes through the reversing valve 8, the drilling tool drive 5, the base sleeve 20, and the spacing between the outer shell 71 and the base tube 6, and passes through the connector 26 to connect to the fixed end 181 of the slip ring 18.

[0090] See also Fig.11 The use of the down-the-hole static probe 100 of this embodiment includes the following steps in sequence.

[0091] Step 1, assembling and debugging the DTH static penetration probe 100: assemble the various components of the DTH static penetration probe 100. After the assembly is completed, pass one end of the umbilical cable 9 through the jack on the upper joint 28, connect the hydraulic pipe in the umbilical cable 9 to the input port 81 and the oil return port of the reversing valve 8, connect the signal cable in the umbilical cable 9 to the cable 29, and connect the other end of the umbilical cable 9 to the hydraulic power system control cabinet 010 and the controller 01 through the umbilical cable winch 09, wherein the hydraulic pipe in the umbilical cable 9 is connected to the hydraulic power system control cabinet 010, and the hydraulic power system control cabinet 010 is composed of a hydraulic oil tank, a hydraulic oil pump, and a control reversing valve, etc., and provides hydraulic power to the DTH static penetration probe 100 through the umbilical cable 9; the signal cable in the umbilical cable 9 is connected to the controller 01, and the reversing valve 8 of the DTH static penetration probe 100 is also connected to the controller 01 by signal. Among them, the controller 10 and the hydraulic power system control cabinet 010 can both adopt the controller and hydraulic station of the prior art. Then, run and debug the actions of drill bit 2 rotary drilling, probe 3 penetration, signal transmission, etc. until they meet the design requirements.

[0092] Step 2: Waterproof and pressure resistance test: After the assembly and debugging of the DTH static penetration probe 100 is completed, the sealing annular cavity where the slip ring 18 is located is inflated through the inflation joint 27 to perform a pressure resistance test. The inflation pressure is 0.7MPa-1.5MPa and the inflation pressure is maintained for 8 hours. If there is no pressure relief, the test is completed. After the test is completed, the inflation joint 27 is replaced with a screw plug to seal the sealing annular cavity where the slip ring 18 is located before use.

[0093] Step 3, on-site installation: install and fix the casing 04 on the base plate 02 through the casing chuck 03 on the base plate 02, lower the casing 04 to the seabed 05 along with the base plate 02, place the down-the-hole static penetration device 100 into the casing 04, connect the upper joint 28 of the down-the-hole static penetration device 100 to the drill pipe 06, and use the drill pipe 06 to lower the down-the-hole static penetration device 100 and the umbilical cable 9 into the predetermined position in the hole, connect the upper end of the drill pipe 06 to the wave compensation drilling rig power head 07, and the wave compensation drilling rig power head 07 is connected to the wave compensation drilling rig winch 011, and install the drill pipe chuck 08 at the hole end of the upper end of the casing 04. In addition, the input port of the mud pump 012 is connected to the mud pool 013, the output port of the mud pump 012 is connected to the water joint on the wave compensation drilling rig power head 07, the inside of the drill pipe 06 is axially penetrated up and down, the water joint on the wave compensation drilling rig power head 07 is connected to the inside of the upper joint 28 of the down-the-hole static probe 100 through the inside of the drill pipe 06, and the upper end of the casing 04 is provided with an opening connected to the mud pool 013. The mud pump 012 is connected to the controller 01 by signal. The mud pool 013, the mud pump 012, the wave compensation drilling rig winch 011, the umbilical cable winch 09, the hydraulic power system control cabinet 010 and the controller 01 are all arranged on the exploration ship 014.

[0094] Step 4, static penetration test: operate the casing chuck 03 and the drill rod chuck 08 to clamp the casing 04 and the drill rod 06 respectively, and fix the casing 04 and the drill rod 06 to provide a supporting reaction force for the penetration of the probe 3 of the down-the-hole static penetration probe 100; press the start button on the hydraulic power system control cabinet 010, the hydraulic power system control cabinet 010 starts to work, and the hydraulic oil is transported to the input port 81 of the reversing valve 8 through the umbilical cable winch 09 and the umbilical cable 9. The controller 01 controls the reversing valve 8 to connect the input port 81 of the reversing valve 8 with the first interface 82 and the return oil port with the second interface 83. The hydraulic oil passes through the first interface 82, the third oil pipe 14, the first oil port 711, the first annular groove 721, The first oil channel 701, the first oil pipe joint 11 and the first oil pipe 10 enter the rodless cavity of the probe driving component 4 (hydraulic cylinder), pushing the piston rod 41 to move downward, thereby driving the probe 3 to move downward. At this time, the hydraulic oil in the rod cavity of the probe driving component 4 (hydraulic cylinder) passes through the second oil pipe 12, the second oil pipe joint 13, the second oil channel 702, the second annular groove 722, the second oil port 712, the fourth oil pipe 15, the second interface 83 and the return oil port of the reversing valve 8 to return the oil to the hydraulic pipe in the umbilical cable 9. The probe 3 moves downward to push open the two relatively closed fins 201 of the drill bit 2, passes through the drill bit 2 between the two fins 201, and penetrates into the formation to carry out the first static penetration test. When the probe 3 moves downward and penetrates the formation, the reaction force is transmitted upward through the drill pipe 06 to the drill pipe chuck 08, transmitted to the casing 04 through the drill pipe chuck 08, transmitted to the casing chuck 03 through the casing 04, and transmitted to the base plate 02 through the casing chuck 03. In the process of the probe 3 penetrating the formation, the measurement signal of the probe 3 is transmitted to the slip ring 18 through the probe signal cable, and the displacement signal of the piston rod 41 of the probe driving member 4 detected by the detection member (laser rangefinder) is transmitted to the slip ring 18 through the detection signal cable 17, and is transmitted to the controller 01 through the slip ring 18 and the cable 29 and the signal cable in the umbilical cable 9. The controller 01 receives the signal and displays, records and stores the received signal in real time.After the first round of static penetration test is completed, the controller 01 controls the reversing valve 8 to reversing, connects the input port 81 of the reversing valve 8 with the second interface 83 and connects the return oil port with the first interface 82, so that the hydraulic oil passes through the second interface 83, the fourth oil pipe 15, the second oil port 712, the second annular groove 722, the second oil channel 702, the second oil pipe joint 13 and the second oil pipe 12 in sequence into the rod cavity of the probe driving member 4 (hydraulic cylinder), pushes the piston rod 41 to move upward, thereby driving the probe 3 to move upward. At this time, the hydraulic oil in the rodless chamber of the probe driving member 4 (hydraulic cylinder) returns to the hydraulic pipe in the umbilical cable 9 through the first oil pipe 10, the first oil pipe joint 11, the first oil channel 701, the first annular groove 721, the first oil port 711, the third oil pipe 14, the first interface 82 and the oil return port of the reversing valve 8. When the probe 3 moves upward and leaves the drill bit 2, the lower ends of the two fins 201 of the drill bit 2 automatically recover and maintain a state of relative connection and closure under the elastic force of the elastic structure, and recover to a full-section drilling drill bit. At this point, the first round of static penetration test is over. Then, according to the drilling depth and the length of the drill rod 06, a drill rod 06 is added under the wave compensation drilling rig power head 07, and the drill rod chuck 08 is operated to loosen the drill rod 06 so that the drill rod 06 can move up and down freely, so as to prepare for the drilling of the down-the-hole static penetration probe 100.

[0095] Step 5, drilling and hole cleaning: the controller 01 controls the reversing valve 8 to reversing, connects the input port 81 of the reversing valve 8 with the third interface 84 and connects the oil return port of the reversing valve 8 with the fourth interface 85, so that the hydraulic oil enters the drilling tool driving component 5 (hydraulic motor) through the third interface 84, and the return oil in the driving component 5 (hydraulic motor) returns to the hydraulic pipe in the umbilical cable 9 through the third interface 84 and the oil return port, and the drilling tool driving component 5 rotates and transmits the torque in turn through the mandrel 72 of the diverter 7 and the drilling tool joint. 16 and the outer tube 1 of the drill tool are transmitted to the drill bit 2, so that the drill bit 2 rotates; the wave compensation drilling rig winch 011 is used to lower the wave compensation drilling rig power head 07 at a uniform speed, so that the rotating drill bit 2 rotates downward at a uniform speed under the action of the deadweight of the down-the-hole static penetration probe 100, the drill rod 06 and the wave compensation drilling rig power head 07, and drills to the set depth of the formation that the probe 3 has penetrated in the first static penetration test (the drilling set depth is 0.5m less than the penetration test depth of the static penetration test). During the downward rotation and drilling of the drill bit 2 at a uniform speed, the controller 01 controls the mud pump 012 to start, and the mud pump 012 sucks mud from the mud pool 013 and outputs it at a certain pressure, and then passes through the water joint on the wave compensation drilling rig power head 07, the inside of the drill pipe 06, and the inside of the upper joint 28 to enter the inside of the base pipe 6, and then passes through the reversing valve 8, the drilling tool drive 5, the base sleeve 20 and the interval between the outer shell 71 and the base pipe 6, and then enters the slurry inlet 713 on the outer shell 71 and the slurry channel 703 in the core shaft 72, and then enters the inside of the drilling tool outer tube 1 through the slurry channel 703, and then passes through the interval between the probe drive 4 and the drilling tool outer tube 1, the flange 44 on the probe drive 4 and the flange seat 42 on the inner wall of the drilling tool outer tube 1. The mud passes through the connecting hole 45, the probe 3 and the space between the drill bit 2 and the outer tube 1 of the drilling tool, and reaches the bottom of the drill bit 2. The mud carries away the soil and rock debris formed by the rotary drilling of the drill bit 2 in the formation from the bottom of the drill bit 2, and passes through the gap between the outer peripheral side of the down-the-hole static probe 100 and the borehole wall 015, the gap between the outer peripheral side of the drill rod 06 and the borehole wall 015, the gap between the outer peripheral side of the drill rod 06 and the borehole wall 015, and the gap between the outer peripheral side of the drill rod 06 and the casing 04, and the opening connected to the mud pool 013 at the upper end of the casing 04, and returns upward to the mud pool 013, thereby completing the bottom hole cleaning. As the mud continuously enters the bottom of the hole from the mud pool 013 and returns to the mud pool 013, the mud can protect the hole wall when passing through the borehole wall 015 along the way to prevent the hole wall from collapsing. After completing the first round of drilling and cleaning, the controller 01 controls the mud pump 012 to turn off, and the mud pump 012 stops conveying mud.

[0096] Step 6: Repeat the above steps 4 and 5 until the designed hole depth of the static penetration test is reached.

[0097] In summary, the down-the-hole static penetration probe 100 of this embodiment has the following advantages:

[0098] (1) It can greatly improve the efficiency of static penetration testing.

[0099] (2) Able to adapt to soft and hard interlayers and interlayer formations.

[0100] (3) It can accurately divide the strata. When the static penetration tester cannot penetrate the hard strata, the drilling penetration rate can be shortened by shortening the drilling and cleaning rounds, that is, shortening the set depth of a single drilling round. For example, the drilling penetration rate can be 5cm-10cm / round, and static penetration tests can be performed frequently to avoid missing the strata that can be used for static penetration tests due to excessive drilling and cleaning penetration rates.

[0101] (4) It can be used for static penetration tests of larger hole depths.

[0102] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principles of the present invention. These improvements and substitutions should also be regarded as the scope of protection of the present invention.

Claims

1. A down-the-hole static penetration probe, characterized in that: include: The outer tube (1) of the drilling tool is axially connected vertically; A drill bit (2) which can be opened or closed is arranged at the lower end of the outer tube (1) of the drilling tool; A probe (3) is arranged inside the outer tube (1) of the drilling tool and located above the drill bit (2); a probe driving member (4) disposed inside the drill tool outer tube (1) and driving the probe (3) to move up and down, so that when the probe (3) moves downward and contacts the drill bit (2), the drill bit (2) opens and passes through the drill bit (2), and when the probe (3) moves upward and leaves the drill bit (2), the drill bit (2) closes; and A drilling tool driving member (5) for driving the drilling tool outer tube (1) to rotate; The base tube (6) is axially connected vertically inside; A flow divider (7) is arranged inside the base tube (6), and a first oil passage (701) and a second oil passage (702) which are independent of each other are formed inside the flow divider (7); a reversing valve (8) disposed inside the base tube (6), the reversing valve (8) having an input port (81) for connecting to a hydraulic pipe in an umbilical cable (9), a first interface (82) connected to the first oil passage (701), and a second interface (83) connected to the second oil passage (702); The probe driving member (4) is a hydraulic cylinder, comprising a rodless chamber, a rod chamber, and a piston rod (41) whose upper end is located in the rod chamber and whose lower end is connected to the probe (3), and the rodless chamber and the rod chamber are respectively connected to the first oil passage (701) and the second oil passage (702); The flow divider (7) comprises an outer shell (71) with a hollow interior and a core shaft (72) which is rotatably sleeved inside the outer shell (71) in the circumferential direction; the drilling tool driving member (5) is arranged inside the base tube (6) and connected to the upper end of the core shaft (72); the lower end of the core shaft (72) is connected to the upper end of the drilling tool outer tube (1); The housing (71) is provided with a first oil port (711) connected to the first interface (82) and a second oil port (712) connected to the second interface (83); the first oil passage (701) and the second oil passage (702) are both arranged in the core shaft (72); the upper end of the first oil passage (701) and the upper end of the second oil passage (702) are respectively connected to the first oil port (711) and the second oil port (712); the lower end of the first oil passage (701) and the lower end of the second oil passage (702) pass through the lower end surface of the core shaft (72) and are respectively connected to the rodless cavity and the rod cavity.

2. The down-the-hole static penetration probe according to claim 1, characterized in that: The drilling tool driving component (5) is a hydraulic motor, and the reversing valve (8) further comprises a third interface (84) and a fourth interface (85) respectively connected to the oil inlet and the oil outlet of the hydraulic motor.

3. The down-the-hole static penetration probe according to claim 1, characterized in that: The upper end of the drill tool outer tube (1) is provided with a drill tool joint (16) for closing the upper end of the drill tool outer tube (1), and the lower end of the core shaft (72) passes through the drill tool joint (16) and is fixedly connected to the drill tool joint (16).

4. The down-the-hole static penetration probe according to claim 3, characterized in that: The reversing valve (8), the drill tool driving component (5) and the housing (71) are all separated from the base tube (6); a slurry inlet (713) is provided on the housing (71); a slurry channel (703) is provided in the core shaft (72); the upper end of the slurry channel (703) is connected to the slurry inlet (713); the lower end of the slurry channel (703) passes through the lower end surface of the core shaft (72); and the probe driving component (4), the probe (3) and the drill bit (2) are all separated from the drill tool outer tube (1).

5. The down-the-hole static penetration probe according to claim 1, characterized in that: A detection member for detecting the displacement of the piston rod (41) is provided inside the outer tube (1) of the drilling tool, and the detection member is connected to a detection signal cable (17). A slip ring (18) is installed at the lower end of the core shaft (72), and the slip ring (18) includes a fixed end (181) and a rotating end (182) which are respectively circumferentially slidably matched and fixedly matched with the core shaft (72). The detection signal cable (17) is connected to the rotating end (182), and the fixed end (181) is connected to a signal cable in the umbilical cable (9).

6. The down-the-hole static penetration probe according to claim 5, characterized in that: The lower end of the base tube (6) is provided with a lower joint (19) for closing the lower end of the base tube (6); the core shaft (72) is rotatably arranged in the circumferential direction through the lower joint (19); the slip ring (18) is located between the lower end of the housing (71) and the lower joint (19); and the core shaft (72) is provided with a cable channel (704) for the detection signal cable (17) to pass through.

7. The down-the-hole static penetration probe according to claim 1, characterized in that: An upper joint (28) is provided at the upper end of the base tube (6) for closing the upper end of the base tube (6), and a plug hole for the umbilical cable (9) to pass through is provided on the upper joint (28).

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