Mining flushing fluid continuous circulation directional drilling tool and method

Abstract

The invention discloses a mining flushing fluid continuous circulation directional drilling tool which comprises a mining flushing fluid continuous circulation directional drilling tool with a cable core and a mining flushing fluid continuous circulation directional drilling tool without a cable core, the drilling tools are suitable for the using working conditions of wired measurement while drilling and wireless measurement while drilling of directional drilling respectively, and signal transmission of a drilling tool device in the using process is guaranteed. According to the device, an original directional drill rod is replaced, flushing fluid can be continuously injected into a drill hole in the loading and unloading process, the circulating state of the flushing fluid in the hole is kept, chippings and sediments in the hole are continuously cleaned, and the drilling efficiency is improved. In this way, due to continuous flushing fluid circulation, the situation that in the directional drilling process, due to sudden starting and stopping of a pump, the equivalent circulation density of the flushing fluid is greatly changed is avoided, the continuity of upward returning of rock debris is kept, accidents in a hole are reduced to the maximum extent, and the success rate and safety of formation drilling such as hole wall collapse, drill jamming and formation cracks are improved.

Description

Technical Field

[0001] The invention relates to a drilling tool capable of maintaining continuous circulation of flushing fluid in a directional construction hole of a coal mine, and in particular to a mine flushing fluid continuous circulation directional drilling tool device and method. Background Art

[0002] Directional drilling in coal mines is an important technical approach and effective means for preventing and controlling gas disasters and water hazards in coal mines. During the directional drilling construction and the withdrawal of the hole in the coal mine, a directional drilling rig is needed to unload the drill rod. During this process, the pump needs to be stopped to terminate the circulation of the flushing fluid in the hole. However, the suspension of the flushing fluid circulation will cause the cuttings in the hole to stop returning, and the sediment in the hole will fall unevenly and concentrate at a certain point in the hole. Due to the large number of turning points in directional drilling, the increase in friction resistance is particularly obvious, and the probability of drill jamming accidents is also greatly increased. After the single drill rod is connected and unloaded and the pump circulation is started, due to the influence of the flushing fluid pressure, the bottom hole pressure will increase rapidly, and the equivalent circulation density of the flushing fluid will also change rapidly. Bottom hole accidents are prone to occur at this time. Summary of the invention

[0003] In view of the deficiencies in the prior art, the purpose of the present invention is to provide a directional drilling tool and method for continuous circulation of flushing fluid for mining. The device replaces the original directional drill rod, and can realize the uninterrupted injection of flushing fluid into the borehole during the loading and unloading process, maintain the circulation state of the flushing fluid in the hole, and continuously clean the debris and sediment in the hole. Such continuous flushing fluid circulation prevents the directional drilling process from causing a large change in the equivalent circulation density of the flushing fluid due to the sudden start and stop of the pump, maintains the continuity of the return of rock cuttings, minimizes the occurrence of accidents in the hole, and improves the success rate and safety of formation drilling such as hole wall collapse, drill stuck, and formation cracks. At the same time, the directional drilling tool device is divided into two structures, one with a cable core and one without a cable core, which are respectively suitable for the use conditions of wired measurement while drilling and wireless measurement while drilling of directional drilling, and ensure the signal transmission of the drilling tool device when it is in use.

[0004] In order to solve the above technical problems, the present invention adopts the following technical solutions to achieve the above problems:

[0005] A mining flushing fluid continuous circulation directional drilling tool, which is a mining flushing fluid continuous circulation directional drilling tool with a cable core, comprising a directional drilling tool device body with a cable core, a cable core assembly and a valve body assembly coaxially arranged in the directional drilling tool device body with a cable core, and an exhaust valve and a side water inlet arranged on the side wall of the directional drilling tool device body with a cable core;

[0006] The cable core assembly includes a conductive ring, a conductive screw, a front conductive spring, a locking conductive nut, a rear conductive spring, an insulating end cap, an outer wire tube, an inner support ring, an outer insulating conductive column, and a conductive contact spring arranged in sequence along the axial direction; it also includes a plastic male connector arranged outside the conductive screw, a male connector insulating sheath arranged outside the locking conductive nut and adjacent to the plastic male connector, a male connector outer sleeve arranged outside the plastic male connector and the male connector insulating sheath, a wire insulating sleeve and a wire arranged inside the outer wire tube, and an insulating layer arranged inside the inner support ring;

[0007] The valve body assembly is coaxially sleeved outside the outer wire tube and includes a positioning circlip, a push valve seat, a push valve, a valve spring, a spool valve seat, a spool valve, and a base arranged in sequence along the axial direction, and an exhaust conduction support arranged between the push valve seat and the spool valve seat; the exhaust conduction support is disposed closely against the inner wall of the directional drilling tool body with a cable core;

[0008] The exhaust valve includes an exhaust valve cover, an exhaust valve spring, an exhaust valve sphere, and an exhaust valve slide column in sequence from the outside to the inside of the cavity. An exhaust valve cover hole, an exhaust valve cover bottom shoulder, and an exhaust valve cover spherical slope are provided on the exhaust valve cover;

[0009] The side water inlet includes a side water inlet upper end cap, a side water inlet valve stem, a side water inlet valve spring, a side water inlet support ring, and a side water inlet lower end cap in sequence from the outside to the inside of the cavity.

[0010] The present invention further includes the following technical features:

[0011] Specifically, the directional drilling tool body with a cable core includes a directional drilling tool male connector with a cable core, a directional drilling tool rod body with a cable core, and a directional drilling tool female connector with a cable core; a positioning mark of the directional drilling tool body with a cable core is provided on the directional drilling tool female connector with a cable core; a shoulder of the directional drilling tool male connector with a cable core is provided inside the directional drilling tool rod body with a cable core.

[0012] Specifically, the conductive screw is arranged inside the plastic male connector, the conductive ring is connected outside the conductive screw, and the front conductive spring is closely attached inside the conductive screw; one end of the wire inside the male connector insulating sheath is connected to the locking conductive nut; one end connected to the locking conductive nut is closely attached to the front conductive spring, and the other end is closely attached to compress the rear conductive spring; the rear conductive spring tightly abuts against the insulating end cap; the middle part of the wire is wrapped in the wire insulating sleeve, and the outside is the outer wire tube; the other end of the wire is connected to the conductive contact spring through the outer insulating conductive column; the outer insulating conductive column is arranged inside the inner support ring, and the inner support ring closely abuts against the shoulder of the directional drilling tool male connector with a cable core and is tightly connected to the outer wire tube.

[0013] Specifically, the push valve is pressed against the push valve seat under the action of the valve spring and closely abuts against the end of the male joint outer sleeve; an exhaust conduction support ring groove is provided on the exhaust conduction support, and it is communicated with the inside and outside of the cavity through the exhaust conduction support hole; the spool seat abuts against the exhaust conduction support; the spool is provided with a spool inclined surface and a spool inner hole; the spool inner hole is arranged on the spool seat convex shaft, so that the spool can slide along the spool seat convex shaft and the outer tube of the wire.

[0014] Specifically, one end of the exhaust valve spring abuts against the bottom shoulder of the exhaust valve cover; the exhaust valve sphere is pressed against the exhaust valve slide column under the action of the exhaust valve spring and blocks the slide column throttle hole; the slide column throttle hole is communicated with the inside of the cavity through the exhaust conduction support.

[0015] Specifically, one end of the side water inlet valve rod is pressed against the upper end cover of the side water inlet under the action of the side water inlet valve spring, isolating the inner cavity from the outside, and at the same time, the end of the side water inlet valve rod contacts the spool inclined surface.

[0016] A continuous circulation directional drill for mine flushing fluid. This drill is a continuous circulation cableless directional drill for mine flushing fluid, including a cableless directional drill device body and a valve body assembly inside it, and also includes the exhaust valve and the side water inlet described above; the exhaust valve and the side water inlet are arranged on the side wall of the cableless directional drill device body; the valve body assembly inside the cableless directional drill device body includes a positioning circlip, a cableless push valve seat, a cableless push valve, an exhaust conduction support, a cableless push valve spring, a cableless spool seat, a cableless spool and a cableless base arranged in sequence along the axis.

[0017] Specifically, the cableless push valve is pressed against the cableless push valve seat under the action of the cableless push valve seat spring; the cableless spool seat abuts against the exhaust conduction support; the cableless spool is provided with a cableless spool inclined surface and a cableless spool hole, and the cableless spool hole is arranged on the cableless spool seat convex shaft, so that the cableless spool hole can slide along the cableless spool seat convex shaft; the end of the side water inlet valve rod contacts the cableless spool inclined surface.

[0018] The construction method of the continuous circulation directional drill for mine flushing fluid is used for wired measurement while drilling directional borehole construction, and includes the following steps:

[0019] Steps for the directional drill device with a cable core above:

[0020] The initial state is: the flushing fluid enters from the side water inlet. At this time, the end of the side water inlet valve rod contacts the spool inclined surface, the spool is tightly closed with the spool seat, the flushing fluid enters the front cable-core directional drill from the base water inlet and enters the bottom of the hole for circulation;

[0021] Step a1: The male joint of the directional drilling tool device with a cable core to be screwed on is gradually connected to the female joint of the previous directional drilling tool with a cable core. At this time, the inner support ring pushes the push valve through the outer sleeve of the male joint, and the push valve gradually disengages from the push valve seat.

[0022] Step a2: The air in the cavity enters through the slide column throttle hole, pushes the exhaust valve sphere to compress the exhaust valve spring, and the gas is discharged through the exhaust valve cover hole.

[0023] Step a3: The male joint of the directional drilling tool device with a cable core to be screwed on is completely connected to the female joint of the previous directional drilling tool device with a cable core. The push valve reaches the maximum position. At this time, the conductive contact spring contacts the conductive ring, and the internal cable core signal is connected.

[0024] Step a4: The side water inlet stops water intake. At this time, under the action of the exhaust valve spring, the end of the side water inlet valve rod disengages from the slide valve inclined plane.

[0025] Step a5: Meanwhile, the flushing fluid enters axially, passes through the push valve seat and enters the cavity. Under the throttling action of the slide column throttle hole, the flushing fluid pushes the exhaust valve slide column to make the exhaust valve sphere tightly abut against the spherical inclined plane of the exhaust valve cover, closing the exhaust valve cover hole.

[0026] Step a6: The flushing fluid flushes open the slide valve, and finally enters the directional drilling tool device with a cable core at the front end along the base water inlet, and enters the hole bottom for circulation; the directional drilling tool device with an upper cable core is completed, and the continuous circulation of the flushing fluid in the process of the directional drilling tool device with an upper cable core is realized.

[0027] For the steps when disassembling the directional drilling tool device with a cable core:

[0028] The initial state is: The flushing fluid enters axially, passes through the push valve seat and enters the cavity. At this time, the exhaust valve cover hole is closed, the slide valve disengages from the slide valve seat, and the flushing fluid finally enters the directional drilling tool device with a cable core at the front end along the base water inlet, and enters the hole bottom for circulation.

[0029] Step b1: The flushing fluid stops entering axially. Meanwhile, it is changed to enter from the side water inlet of the previous drilling tool device of the drilling tool device to be disassembled. At this time, the end of the side water inlet valve rod tightly contacts the slide valve inclined plane, the slide valve and the slide valve seat are tightly closed, and the flushing fluid enters the directional drilling tool device with a cable core at the front end along the base water inlet, and enters the hole bottom for circulation.

[0030] Step b2: Unscrew the male joint of the directional drilling tool device with a cable core to be disassembled from the female joint of the previous directional drilling tool device.

[0031] Step b3: The push valve tightly closes against the push valve seat under the action of the valve spring, and the inner support ring returns to the initial position under the action of the push valve, completing the disassembly of the directional drilling tool device with a cable core.

[0032] The construction method of the continuous circulation directional drilling tool for mine flushing fluid is used for the construction of directional drilling with wireless measurement while drilling such as mud pulse, and includes the following steps:

[0033] Steps for the directional drilling tool device without a cable core:

[0034] The initial state is: the flushing fluid enters from the side water inlet. At this time, the end of the side water inlet valve stem is in close contact with the inclined plane of the cableless core slide valve. The cableless core slide valve and the cableless core slide valve seat are tightly closed. The flushing fluid enters the directional drilling tool device of the front cableless core from the base water inlet and enters the bottom of the hole for circulation;

[0035] Step c1, the male joint of the directional drilling tool device of the cableless core to be screwed on is gradually connected to the female joint of the previous directional drilling tool device of the cableless core. At this time, the push rod pushes the cableless core push valve, and the cableless core push valve is gradually separated from the cableless core push valve seat;

[0036] Step c2, the air in the cavity enters through the slide column throttle hole, and pushes the exhaust valve ball to compress the exhaust valve spring. The gas is discharged from the exhaust valve cover hole;

[0037] Step c3, the male joint of the directional drilling tool device of the cableless core to be screwed on is completely connected to the female joint of the previous directional drilling tool device of the cableless core, and the cableless core push valve reaches the maximum position;

[0038] Step c4, the side water inlet stops water inlet. At this time, under the action of the exhaust valve spring, the end of the side water inlet valve stem is separated from the inclined plane of the cableless core slide valve;

[0039] Step c5, meanwhile, the flushing fluid enters axially, passes through the cableless core push valve seat and enters the cavity. Under the throttling action of the slide column throttle hole, the flushing fluid pushes the exhaust valve slide column to make the exhaust valve ball tightly adhere to the inclined plane of the exhaust valve cover ball, closing the exhaust valve cover hole;

[0040] Step c6, the flushing fluid flushes open the cableless core slide valve, and finally enters the directional drilling tool device of the front cableless core along the cableless core base water inlet and enters the bottom of the hole for circulation; the directional drilling tool device without a cable core is completed, and the continuous circulation of the flushing fluid in the process of the directional drilling tool device without a cable core is realized;

[0041] Steps for removing the directional drilling tool device of the cableless core:

[0042] The initial state is: the flushing fluid enters axially, passes through the push valve seat and enters the cavity. At this time, the exhaust valve cover hole is closed, the slide valve is separated from the slide valve seat, and the flushing fluid finally enters the directional drilling tool device with a cable core at the front from the base water inlet and enters the bottom of the hole for circulation;

[0043] Step d1: The flushing fluid stops entering axially. At the same time, it starts to enter from the side water inlet of the previous drill tool device of the drill tool device to be disassembled. At this time, the end of the side water inlet valve stem is in close contact with the inclined surface of the cableless spool valve. The cableless spool valve and the cableless spool valve seat are closely closed. The flushing fluid enters the directional drill tool device at the front end without a cable core from the water outlet at the bottom of the cableless base and enters the hole bottom for circulation.

[0044] Step d2: Unscrew the male connector of the directional drill tool device without a cable core to be disassembled from the female connector of the previous directional drill tool device.

[0045] Step d3: The cableless push valve is closely closed with the cableless push valve seat under the action of the cableless push valve spring, completing the disassembly of the directional drill tool device without a cable core.

[0046] Compared with the prior art, the present invention has the following technical effects:

[0047] 1. The present invention enables the directional drill tool device to still ensure the continuous circulation of the flushing fluid in the hole during the installation and removal process.

[0048] The directional drill tool device of the present invention replaces the original directional drill pipe. A water inlet is provided beside the directional drill tool device, and two valves are arranged at the central position of the directional drill tool device. In this way, the water inlet channel can be switched during the installation and removal of the directional drill tool device, realizing the non-stop pumping during the installation and removal of the directional drill tool device, and enabling the continuous circulation of the flushing fluid inside and outside the drill tool device.

[0049] 2. The present invention enables the directional drill tool device to achieve continuous switching of water inlet and low-power flushing fluid circulation.

[0050] Two valve body assemblies are arranged inside the directional drill tool device of the present invention. One valve body is linked when the male and female connectors of the directional drill tool device are connected, and the closing of the other valve body is linked with the side water inlet. This can not only ensure the continuity when switching the water inlet, but also ensure the safety of installing and removing the directional drill tool device. Moreover, since the valve bodies are linked rather than opened by water pressure, the local loss will be very small, and the requirements for equipment such as pumps are not increased, realizing lower energy consumption for continuous circulation of the flushing fluid.

[0051] 3. The present invention enables the directional drill tool device to have a gas-liquid separation type exhaust valve to ensure the safety when the movement cavity of the valve body changes.

[0052] The directional drilling tool device of the present invention is provided with an exhaust valve on the side of the inner cavity. A sliding exhaust valve slide column is arranged on the exhaust valve, a throttle hole is arranged on the exhaust valve slide column, and an exhaust valve sphere is also arranged on the exhaust valve. The exhaust valve sphere is in contact with the exhaust valve slide column. When exhausting, the gas is discharged through the throttle hole and the upper exhaust hole. When high-pressure liquid flows in, it is throttled at the throttle hole, and the slide column and the exhaust valve sphere are pushed to block the upper exhaust hole, so as to ensure that the high-pressure liquid will not be discharged from the exhaust valve and ensure the construction safety.

[0053] 4. The present invention has two structures, with and without a cable core, which can meet the directional drilling requirements of wired measurement while drilling and wireless measurement while drilling.

[0054] The directional drilling tool device of the present invention has two structures, with and without a cable core. The structure with a cable core can ensure the stability, continuity and sealing performance of signal transmission. At the same time, the internal structure is linked with the valve body, but they are independent of each other in structure, ensuring the reliability of the directional drilling tool device with a cable core. The structure without a cable core has the internal valve bodies opened and closed by a mechanism, without the need for water control, so the local loss is small and the power consumption is low. For example, the mud pulse signal transmission is stable.

[0055] 5. The present invention can be linked with the special equipment on the drilling rig to realize the automation of loading and unloading.

[0056] The joint of the directional drilling tool device of the present invention is provided with positioning marks for the identification and positioning of sensors, which can realize the automation during loading and unloading. At the same time, a socket is arranged at the side water inlet for automatic water inlet. Description of the Drawings

[0057] Figure 1 It is a schematic structural diagram of the directional drilling tool with a cable core for continuous circulation of mine flushing fluid of the present invention.

[0058] Figure 2 It is a partially enlarged structural schematic diagram of the exhaust valve of the device of the present invention.

[0059] Figure 3 It is a partially enlarged structural schematic diagram of the side water inlet of the device of the present invention.

[0060] Figure 4 It is a schematic structural diagram of the directional drilling tool without a cable core for continuous circulation of mine flushing fluid of the present invention.

[0061] The meanings of the various labels in the figure are as follows:

[0062] 1-1. Directional drilling tool device body with cable core, 1-2. Conductive ring, 1-3. Plastic male connector, 1-4. Conductive screw, 1-5. Outer sleeve of male connector, 1-6. Front conductive spring, 1-7. Locking conductive nut, 1-8. Insulating sheath of male connector, 1-9. Rear conductive spring, 1-10. Exhaust valve, 1-11. Water inlet measuring port, 1-12. Outer tube of wire, 1-13. Insulating sleeve of wire, 1-14. Wire, 1-15. Inner support ring, 1-16. Outer insulating conductive column, 1-17. Conductive contact spring, 1-18. Insulating layer, 1-19. Base, 1-20. Slide valve, 1-21. Slide valve seat, 1-22. Exhaust conduction support, 1-23. Valve spring, 1-24. Valve push rod, 1-25. Valve push rod seat, 1-26. Positioning snap ring, 1-27. Insulating end cover, 1-1-1. Male connector of directional drilling tool device with cable core, 1-1-2. Rod body of directional drilling tool device with cable core, 1-1-3. Female connector of directional drilling tool device with cable core, 1-10-1. Exhaust valve cover, 1-10-2. Exhaust valve spring, 1-10-3. Exhaust valve sphere, 1-10-4. Exhaust valve slide column, 1-11-1. Upper end cover of side water inlet, 1-11-2. Valve rod of side water inlet, 1-11-3. Valve spring of side water inlet, 1-11-4. Support ring of side water inlet, 1-11-5. Lower end cover of side water inlet, 1-15-1. Hole of inner support ring, 1-19-1. Water inlet of base, 1-20-1. Slide valve inclined plane, 1-20-2. Inner hole of slide valve, 1-21-1. Water outlet hole of slide valve seat, 1-21-2. Convex shaft of slide valve seat, 1-22-1. Groove of exhaust conduction support ring, 1-22-2. Hole of exhaust conduction support, 1-1-1-1. Shoulder of male connector of directional drilling tool device with cable core, 1-1-3-1. Positioning mark of directional drilling tool device body with cable core, 1-10-1-1. Hole of exhaust valve cover, 1-10-1-2. Bottom shoulder of exhaust valve cover, 1-10-1-3. Ball inclined plane of exhaust valve cover, 1-10-4-1. Throttle hole of slide column, 1-10-4-2. End face of slide column, 1-11-2-1. End of valve rod of side water inlet;

[0063] 2-1. Directional drilling tool device body without cable core, 2-2. Valve push rod seat without cable core, 2-3. Valve push rod without cable core, 2-4. Valve spring without cable core, 2-5. Slide valve without cable core, 2-6. Base without cable core, 2-7. Push rod, 2-8. Slide valve seat without cable core, 2-1-1. Male connector of directional drilling tool device without cable core, 2-1-2. Rod body of directional drilling tool device without cable core, 2-1-3. Female connector of directional drilling tool device without cable core, 2-5-1. Slide valve inclined plane without cable core, 2-5-2. Inner hole of slide valve without cable core, 2-6-1. Water inlet of base without cable core, 2-7-1. Water outlet hole of push rod, 2-8-1. Water inlet of slide valve seat without cable core, 2-8-2. Convex shaft of slide valve seat without cable core, 2-1-3-1. Positioning mark of directional drilling tool device body without cable core. Detailed implementation mode

[0064] The present invention provides a continuous circulation directional drilling tool device for mine flushing fluid. Through innovative design of the directional drilling tool device, it can ensure that when the drill pipe is removed and installed during the construction of directional boreholes in coal mines, the continuous circulation of the flushing fluid in the borehole is maintained, the equivalent circulation density of the flushing fluid in the borehole is stabilized, so that the cuttings in the directional borehole can be discharged out of the borehole in time, preventing the occurrence of borehole accidents caused by the collapse of the borehole due to the accumulation of cuttings, and improving the hole-forming rate of the directional borehole.

[0065] The following are specific embodiments of the present invention. It should be noted that the present invention is not limited to the following specific embodiments, and all equivalent transformations made on the basis of the technical solutions of this application fall within the protection scope of the present invention.

[0066] Embodiment 1:

[0067] As Figures 1 to 3 shown, this embodiment provides a continuous circulation directional drilling tool for mine flushing fluid. This drilling tool is a continuous circulation directional drilling tool for mine flushing fluid with a cable core, including a directional drilling tool device body 1-1 with a cable core, a cable core assembly and a valve body assembly coaxially arranged in the directional drilling tool device body 1-1 with a cable core, an exhaust valve 1-10 and a side water inlet 1-11 arranged on the side wall of the directional drilling tool device body 1-1 with a cable core.

[0068] The cable core assembly includes a conductive ring 1-2, a conductive screw 1-4, a conductive front spring 1-6, a locking conductive nut 1-7, a conductive rear spring 1-9, an insulating end cap 1-27, a wire outer tube 1-12, an inner support ring 1-15, an outer insulating conductive column 1-16, and a conductive contact spring 1-17 arranged in sequence along the axial direction; it also includes a plastic male connector 1-3 arranged outside the conductive screw 1-4, a male connector insulating sheath 1-8 arranged outside the locking conductive nut 1-7 and adjacent to the plastic male connector 1-3, a male connector outer sleeve 1-5 arranged outside the plastic male connector 1-3 and the male connector insulating sheath 1-8, a wire insulating sleeve 1-13 and a wire 1-14 arranged inside the wire outer tube 1-12, and an insulating layer 1-18 arranged inside the inner support ring 1-15; the rear end of the current inner support ring 1-15 can be sleeved outside the conductive ring 1-2 and the plastic male connector 1-3 of the previous continuous circulation directional drilling tool for mine flushing fluid with a cable core and abuts against the end of the male connector outer sleeve 1-5, so as to compress the valve spring 1-23, and the current conductive contact spring 1-17 contacts the conductive ring 1-2 of the previous continuous circulation directional drilling tool for mine flushing fluid with a cable core, and the internal cable core signal is connected.

[0069] The coaxial sleeve of the valve body assembly is outside the wire outer tube 1-12, and includes a positioning circlip 1-26, a push valve seat 1-25, a push valve 1-24, a valve spring 1-23, a slide valve seat 1-21, a slide valve 1-20 and a base 1-19 arranged in sequence along the axial direction, and an exhaust conduction support 1-22 arranged between the push valve seat 1-25 and the slide valve seat 1-21; the exhaust conduction support 1-22 is arranged closely along the inner wall of the directional drilling tool body 1-1 with a cable core.

[0070] The exhaust valve 1-10 from the outside to the inside of the cavity in sequence includes an exhaust valve cover 1-10-1, an exhaust valve spring 1-10-2, an exhaust valve sphere 1-10-3 and an exhaust valve slide column 1-10-4. An exhaust valve cover hole 1-10-1-1, an exhaust valve cover bottom shoulder 1-10-1-2 and an exhaust valve cover ball inclined surface 1-10-1-3 are arranged on the exhaust valve cover 1-10-1.

[0071] The side water inlet 1-11 from the outside to the inside of the cavity in sequence includes an upper end cover 1-11-1 of the side water inlet, a valve rod 1-11-2 of the side water inlet, a valve spring 1-11-3 of the side water inlet, a support ring 1-11-4 of the side water inlet and a lower end cover 1-11-5 of the side water inlet.

[0072] The directional drilling tool body 1-1 with a cable core includes a male joint 1-1-1 of the directional drilling tool with a cable core, a rod body 1-1-2 of the directional drilling tool with a cable core and a female joint 1-1-3 of the directional drilling tool with a cable core; a positioning mark 1-1-3-1 of the directional drilling tool body is arranged on the female joint 1-1-3 of the directional drilling tool with a cable core; a shoulder 1-1-1-1 of the male joint of the directional drilling tool with a cable core is arranged inside the rod body 1-1-2 of the directional drilling tool with a cable core.

[0073] The conductive screw 1-4 is arranged inside the plastic male joint 1-3. The conductive ring 1-2 is connected outside the conductive screw 1-4. The conductive front spring 1-6 is closely attached inside the conductive screw 1-4; one end of the wire 1-14 inside the male joint insulation sheath 1-8 is connected to the locking conductive nut 1-7; one end connecting the locking conductive nut 1-7 is closely attached to the conductive front spring 1-6, and the other end is closely attached to the compressed conductive rear spring 1-9; the conductive rear spring 1-9 tightly abuts against the insulating end cap 1-27; the middle part of the wire 1-14 is wrapped in the wire insulation sleeve 1-13, and the outside is the wire outer tube 1-12; the other end of the wire 1-14 is connected to the conductive contact spring 1-17 through the outer insulating conductive column 1-16; the outer insulating conductive column 1-16 is arranged inside the inner support ring 1-15. The inner support ring 1-15 abuts against the shoulder 1-1-1-1 of the male joint of the directional drilling tool with a cable core and is tightly connected to the wire outer tube 1-12.

[0074] The push valve 1-24 is pressed against the push valve seat 1-25 under the action of the valve spring 1-23 and is in close contact with the male joint outer sleeve 1-5; an exhaust conduction support ring groove 1-22-1 is provided on the exhaust conduction support 1-22, and it is communicated with the inside and outside of the cavity through the exhaust conduction support hole 1-22-2; the spool seat 1-21 abuts against the exhaust conduction support 1-22; the spool 1-20 is provided with a spool inclined surface 1-20-1 and a spool inner hole 1-20-2; the spool inner hole 1-20-2 is placed on the spool seat convex shaft 1-21-2, so that the spool 1-20 can slide along the spool seat convex shaft 1-21-2 and the outer wire tube 1-12.

[0075] One end of the exhaust valve spring 1-10-2 abuts against the bottom shoulder 1-10-1-2 of the exhaust valve cover; the exhaust valve sphere 1-10-3 is pressed tightly against the exhaust valve slide column 1-10-4 under the action of the exhaust valve spring 1-10-2 and blocks the slide column throttle hole 1-10-4-1; the slide column throttle hole 1-10-4-1 is communicated with the inside of the cavity through the exhaust conduction support 1-22.

[0076] One end of the side water inlet valve rod 1-11-2 is pressed against the upper end cover 1-11-1 of the side water inlet under the action of the side water inlet valve spring 1-11-3, isolating the inner cavity from the outside, and at the same time the end 1-11-2-1 of the side water inlet valve rod contacts the spool inclined surface 1-20-1.

[0077] Embodiment 2:

[0078] As Figures 2 to 4 shown, this embodiment provides a mining flushing fluid continuous circulation directional drill. This drill is a mining flushing fluid continuous circulation non-cable core directional drill, including a non-cable core directional drill device body 2-1 and a valve body assembly inside it. It also includes the exhaust valve 1-10 and the side water inlet 1-11 in Embodiment 1; the exhaust valve 1-10 and the side water inlet 1-11 are arranged on the side wall of the non-cable core directional drill device body 2-1; the valve body assembly inside the non-cable core directional drill device body 2-1 includes a positioning circlip 1-26, a non-cable core push valve seat 2-2, a non-cable core push valve 2-3, an exhaust conduction support 1-22, a non-cable core push valve spring 2-4, a non-cable core spool seat 2-8, a non-cable core spool 2-5 and a non-cable core base 2-6 arranged in sequence along the axial direction.

[0079] The non-cable core push valve 2-3 is pressed against the non-cable core push valve seat 2-2 under the action of the non-cable core push valve seat spring 2-4; the non-cable core spool seat 2-8 abuts against the exhaust conduction support 1-22; the non-cable core spool 2-5 is provided with a non-cable core spool inclined surface 2-5-1 and a non-cable core spool hole 2-5-2. The non-cable core spool hole 2-5-2 is placed on the non-cable core spool seat convex shaft 2-8-2, so that the non-cable core spool hole 2-5-2 can slide along the non-cable core spool seat convex shaft 2-8-2; the end 1-11-2-1 of the side water inlet valve rod contacts the non-cable core spool inclined surface 2-5-1.

[0080] The present invention provides a construction method for a continuous circulation directional drilling tool for mine flushing fluid in Embodiment 1, which is used for wired measurement-while-drilling directional borehole construction, and includes the following steps:

[0081] Steps for the directional drilling tool device with a cable core:

[0082] The initial state is: the flushing fluid enters from the side water inlet. At this time, the end of the side water inlet valve stem is in close contact with the inclined surface of the slide valve, the slide valve is tightly closed with the slide valve seat, the flushing fluid enters the directional drilling tool device with a cable core at the front end from the base water inlet, and enters the bottom of the hole for circulation;

[0083] Step a1: The male joint of the directional drilling tool device with a cable core to be screwed on is gradually connected to the female joint of the previous directional drilling tool device with a cable core. At this time, the inner support ring pushes the push valve through the outer sleeve of the male joint, and the push valve gradually separates from the push valve seat;

[0084] Step a2: The air in the cavity enters through the slide column throttle hole, and pushes the exhaust valve sphere to compress the exhaust valve spring, and the gas is discharged from the exhaust valve cover hole;

[0085] Step a3: The male joint of the directional drilling tool device with a cable core to be screwed on is completely connected to the female joint of the previous directional drilling tool device with a cable core, and the push valve reaches the maximum position. At this time, the conductive contact spring is in contact with the conductive ring, and the internal cable core signal is connected;

[0086] Step a4: The side water inlet stops supplying water. At this time, under the action of the exhaust valve spring, the end of the side water inlet valve stem separates from the inclined surface of the slide valve;

[0087] Step a5: At the same time, the flushing fluid enters axially, passes through the push valve seat and enters the cavity. Under the throttling action of the slide column throttle hole, the flushing fluid pushes the exhaust valve slide column to make the exhaust valve sphere tightly abut against the spherical inclined surface of the exhaust valve cover, closing the exhaust valve cover hole;

[0088] Step a6: The flushing fluid flushes open the slide valve, and finally enters the directional drilling tool device with a cable core at the front end along the base water inlet, and enters the bottom of the hole for circulation; the directional drilling tool device with a cable core is completed, and the continuous circulation of the flushing fluid in the process of the directional drilling tool device with a cable core is realized;

[0089] Steps for removing the directional drilling tool device with a cable core:

[0090] The initial state is: the flushing fluid enters axially, passes through the push valve seat and enters the cavity. At this time, the exhaust valve cover hole is closed, the slide valve is separated from the slide valve seat, and the flushing fluid finally enters the directional drilling tool device with a cable core at the front end from the base water inlet, and enters the bottom of the hole for circulation;

[0091] Step b1: The flushing fluid stops entering axially. At the same time, it starts to enter from the side water inlet of the previous drill tool device of the drill tool device to be disassembled. At this time, the end of the side water inlet valve stem is in close contact with the inclined surface of the slide valve, and the slide valve is tightly closed with the slide valve seat. The flushing fluid enters the directional drill tool device with a cable core at the front end from the base water inlet and enters the bottom of the hole for circulation;

[0092] Step b2: Unscrew the male connector of the directional drill tool device with a cable core to be disassembled from the female connector of the previous directional drill tool device;

[0093] Step b3: Under the action of the valve spring, the push valve pushes the valve seat tightly closed. The inner support ring returns to its initial position under the action of the push valve, completing the disassembly of the directional drill tool device with a cable core;

[0094] The present invention provides a construction method for a mine flushing fluid continuous circulation directional drill tool in Embodiment 2, which is used for wireless measurement while drilling directional borehole construction such as mud pulse, and includes the following steps:

[0095] Steps for the directional drill tool device without a cable core above:

[0096] The initial state is: The flushing fluid enters from the side water inlet. At this time, the end of the side water inlet valve stem is in close contact with the inclined surface of the cable-free slide valve, and the cable-free slide valve is tightly closed with the cable-free slide valve seat. The flushing fluid enters the directional drill tool device without a cable core at the front end from the base water inlet and enters the bottom of the hole for circulation;

[0097] Step c1: The male connector of the directional drill tool device without a cable core to be screwed on is gradually connected to the female connector of the previous directional drill tool device without a cable core. At this time, the push rod pushes the cable-free push valve, and the cable-free push valve gradually disengages from the cable-free push valve seat;

[0098] Step c2: The air in the cavity enters through the throttle hole of the slide column, and pushes the exhaust valve sphere to compress the exhaust valve spring, and the gas is discharged from the exhaust valve cover hole;

[0099] Step c3: The male connector of the directional drill tool device without a cable core to be screwed on is completely connected to the female connector of the previous directional drill tool device without a cable core, and the cable-free push valve reaches the maximum position;

[0100] Step c4: The side water inlet stops water intake. At this time, under the action of the exhaust valve spring, the end of the side water inlet valve stem disengages from the inclined surface of the cable-free slide valve;

[0101] Step c5: At the same time, the flushing fluid enters axially, passes through the cable-free push valve seat and enters the cavity. Under the throttling action of the slide column throttle hole, the flushing fluid pushes the exhaust valve slide column to make the exhaust valve sphere tightly abut against the inclined surface of the exhaust valve cover ball, closing the exhaust valve cover hole;

[0102] Step c6, the flushing fluid flushes open the cableless core slide valve, and finally enters the directional drilling tool device at the front end without a cable core along the water inlet of the cableless core base, and enters the bottom of the hole for circulation; the directional drilling tool device without a cable core is completed, and continuous circulation of the flushing fluid during the process of the directional drilling tool device without a cable core is realized.

[0103] For the steps when disassembling the directional drilling tool device without a cable core:

[0104] The initial state is: the flushing fluid enters axially, passes through the push valve seat and enters the cavity. At this time, the exhaust valve cover hole is closed, the slide valve is disengaged from the slide valve seat, and the flushing fluid finally enters the directional drilling tool device with a cable core at the front end through the base water inlet, and enters the bottom of the hole for circulation.

[0105] Step d1, the flushing fluid stops entering axially. At the same time, it is changed to enter from the side water inlet of the previous drilling tool device of the drilling tool device to be disassembled. At this time, the end of the side water inlet valve stem is in close contact with the inclined surface of the cableless core slide valve, and the cableless core slide valve and the cableless core slide valve seat are tightly closed. The flushing fluid enters the directional drilling tool device without a cable core at the front end through the cableless core base water inlet, and enters the bottom of the hole for circulation.

[0106] Step d2, unscrew the male joint of the directional drilling tool device without a cable core to be disassembled from the female joint of the previous directional drilling tool device.

[0107] Step d3, the cableless core push valve is tightly closed with the cableless core push valve seat under the action of the cableless core push valve spring, and the disassembly of the directional drilling tool device without a cable core is completed.

[0108] The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the specific details in the above embodiments. Within the scope of the technical concept of the present invention, various simple modifications can be made to the technical solutions of the present invention, and these simple modifications all fall within the protection scope of the present invention.

[0109] In addition, it should be noted that, in the case of no contradiction, the various specific technical features described in the above specific embodiments can be combined in any appropriate manner. In order to avoid unnecessary repetition, the present invention will not separately describe various possible combination methods.

[0110] In addition, any combination can be made between various different embodiments of the present invention, as long as it does not violate the idea of the present invention, it should also be regarded as the content disclosed by the present invention.

Claims

1. A mining flushing fluid continuous circulation directional drilling tool, characterized in that: The drilling tool is a directional drilling tool with a cable core for continuous circulation of flushing fluid for mining, comprising a directional drilling tool device body (1-1) with a cable core, a cable core assembly and a valve body assembly coaxially arranged in the directional drilling tool device body (1-1), and an exhaust valve (1-10) and a side water inlet (1-11) arranged on the side wall of the directional drilling tool device body (1-1) with a cable core; The cable core assembly comprises a conductive ring (1-2), a conductive screw (1-4), a conductive front spring (1-6), a locking conductive nut (1-7), a conductive rear spring (1-9), an insulating end cover (1-27), a conductor outer tube (1-12), an inner support ring (1-15), an outer insulating conductive column (1-16), and a conductive contact spring (1-17) which are sequentially arranged along the axial direction; and further comprises a plastic male connector (1-3) arranged outside the conductive screw (1-4), a male connector insulating sheath (1-8) arranged outside the locking conductive nut (1-7) and adjacent to the plastic male connector (1-3), a male connector outer sleeve (1-5) arranged outside the plastic male connector (1-3) and the male connector insulating sheath (1-8), a conductor insulating sheath (1-13) and a conductor (1-14) arranged inside the conductor outer tube (1-12), and an insulating layer (1-18) arranged inside the inner support ring (1-15); The valve body assembly is coaxially sleeved outside the conductor outer tube (1-12), and comprises a positioning clamping spring (1-26), a push valve seat (1-25), a push valve (1-24), a valve spring (1-23), a sliding valve seat (1-21), a sliding valve (1-20) and a base (1-19) which are sequentially arranged along the axial direction, and an exhaust conduction support (1-22) arranged between the push valve seat (1-25) and the sliding valve seat (1-21); the exhaust conduction support (1-22) is arranged in close contact with the inner wall of the directional drilling tool device body (1-1) with a cable core; The exhaust valve (1-10) comprises an exhaust valve cover (1-10-1), an exhaust valve spring (1-10-2), an exhaust valve ball (1-10-3) and an exhaust valve slide column (1-10-4) in sequence from the outside to the inside of the cavity; the exhaust valve cover (1-10-1) is provided with an exhaust valve cover hole (1-10-1-1), an exhaust valve cover bottom shoulder (1-10-1-2) and an exhaust valve cover ball inclined surface (1-10-1-3); The side water inlet (1-11) comprises, in sequence from the outside to the inside of the cavity, a side water inlet upper end cover (1-11-1), a side water inlet valve stem (1-11-2), a side water inlet valve spring (1-11-3), a side water inlet support ring (1-11-4) and a side water inlet lower end cover (1-11-5).

2. The mining flushing fluid continuous circulation directional drilling tool according to claim 1, characterized in that: The directional drilling tool body with a cable core (1-1) comprises a directional drilling tool male joint (1-1-1), a directional drilling tool rod body (1-1-2) and a directional drilling tool female joint (1-1-3); a directional drilling tool body with a cable core positioning mark (1-1-3-1) is arranged on the directional drilling tool female joint (1-1-3); and a directional drilling tool male joint shoulder (1-1-1-1) is arranged in the directional drilling tool rod body (1-1-2).

3. The mining flushing fluid continuous circulation directional drilling tool according to claim 2, characterized in that: The conductive screw (1-4) is arranged in the plastic male connector (1-3), the conductive screw (1-4) is externally connected to the conductive ring (1-2), and the conductive screw (1-4) is internally close to the conductive front spring (1-6); one end of the conductive wire (1-14) in the male connector insulating sheath (1-8) is connected to the locking conductive nut (1-7); one end of the connecting and locking conductive nut (1-7) is close to the conductive front spring (1-6), and the other end is close to the compressed conductive rear spring (1-9); the conductive rear spring (1-9) is tightly against the insulating end cover ( 1-27); the middle part of the wire (1-14) is wrapped in a wire insulation sleeve (1-13), and the outside is a wire outer tube (1-12); the other end of the wire (1-14) is connected to a conductive contact spring (1-17) through an external insulating conductive column (1-16); the external insulating conductive column (1-16) is arranged in an inner support ring (1-15), and the inner support ring (1-15) is closely attached to a male connector shoulder (1-1-1-1) of a directional drilling tool device with a cable core, and is tightly connected to the wire outer tube (1-12).

4. The mining flushing fluid continuous circulation directional drilling tool according to claim 1, characterized in that: The push valve (1-24) is tightly against the push valve seat (1-25) under the action of the valve spring (1-23), and is tightly against the end of the male connector sleeve (1-5); the exhaust conduction support (1-22) is provided with an exhaust conduction support annular groove (1-22-1), and is communicated with the inside and outside of the cavity through the exhaust conduction support hole (1-22-2); the slide valve seat (1-21) is against the exhaust conduction support (1-22); the slide valve (1-20) is provided with a slide valve inclined surface (1-20-1) and a slide valve inner hole (1-20-2); the slide valve inner hole (1-20-2) is arranged on the slide valve seat convex shaft (1-21-2), so that the slide valve (1-20) can slide along the slide valve seat convex shaft (1-21-2) and the wire outer tube (1-12).

5. The mining flushing fluid continuous circulation directional drilling tool according to claim 1, characterized in that: One end of the exhaust valve spring (1-10-2) rests on the bottom shoulder (1-10-1-2) of the exhaust valve cover; the exhaust valve ball (1-10-3) is tightly attached to the exhaust valve slide column (1-10-4) under the action of the exhaust valve spring (1-10-2), and blocks the slide column throttle hole (1-10-4-1); the slide column throttle hole (1-10-4-1) is connected to the interior of the cavity through the exhaust conduction support (1-22).

6. The mining flushing fluid continuous circulation directional drilling tool according to claim 5, characterized in that: One end of the side water inlet valve stem (1-11-2) is closely attached to the side water inlet upper end cover (1-11-1) under the action of the side water inlet valve spring (1-11-3), so that the inner cavity is isolated from the outside, and at the same time, the end head (1-11-2-1) of the side water inlet valve stem is in contact with the inclined surface (1-20-1) of the sliding valve.

7. A mining flushing fluid continuous circulation directional drilling tool, characterized in that: The drilling tool is a cable-free directional drilling tool for continuous circulation of flushing fluid for mining, comprising a cable-free directional drilling tool device body (2-1) and a valve body assembly therein, and also comprising the exhaust valve (1-10) and the side water inlet (1-11) described in claim 6; the exhaust valve (1-10) and the side water inlet (1-11) are arranged on the side wall of the cable-free directional drilling tool device body (2-1); the valve body assembly in the cable-free directional drilling tool device body (2-1) comprises a positioning retaining spring (1-26), a cable-free core push valve seat (2-2), a cable-free core push valve (2-3), an exhaust conduction support (1-22), a cable-free core push valve spring (2-4), a cable-free core sliding valve seat (2-8), a cable-free core sliding valve (2-5) and a cable-free core base (2-6) arranged in sequence along the axial direction.

8. The mining flushing fluid continuous circulation directional drilling tool according to claim 7, characterized in that: The cable-free core push valve (2-3) is closely abutted against the cable-free core push valve seat (2-2) under the action of the cable-free core push valve seat spring (2-4); the cable-free core sliding valve seat (2-8) is abutted against the exhaust conduction support (1-22); the cable-free core sliding valve (2-5) is provided with a cable-free core sliding valve inclined surface (2-5-1) and a cable-free core sliding valve hole (2-5-2); the cable-free core sliding valve hole (2-5-2) is arranged on the cable-free core sliding valve seat convex shaft (2-8-2), so that the cable-free core sliding valve hole (2-5-2) can slide along the cable-free core sliding valve seat convex shaft (2-8-2); the side water inlet valve stem end (1-11-2-1) is in contact with the cable-free core sliding valve inclined surface (2-5-1).

9. The construction method of the mining flushing fluid continuous circulation directional drilling tool according to any one of claims 1 to 6, characterized in that: Used for wired measurement while drilling directional drilling construction, including the following steps: Steps for installing directional drilling tools with cable core: The initial state is: the flushing liquid enters from the side water inlet, at which time the end of the side water inlet valve stem contacts the inclined surface of the slide valve, the slide valve and the slide valve seat are tightly closed, and the flushing liquid enters the directional drilling tool with a cable core at the front end from the base water inlet and enters the bottom of the hole for circulation; Step a1, the male connector of the directional drilling tool with cable core to be screwed on is gradually connected to the previous female connector of the directional drilling tool with cable core, at this time, the inner support ring pushes the push valve through the outer sleeve of the male connector, and the push valve is gradually separated from the push valve seat; Step a2, the air in the cavity enters through the throttle hole of the sliding column, and pushes the exhaust valve ball to compress the exhaust valve spring, and the gas is discharged from the exhaust valve cover hole; Step a3, the male connector of the directional drilling tool with cable core to be screwed on is completely connected to the female connector of the directional drilling tool with cable core, and the push valve reaches the maximum position. At this time, the conductive contact spring contacts the conductive ring, and the internal cable core signal is connected; Step a4, the side water inlet stops inletting water, and at this time, under the action of the exhaust valve spring, the end of the valve stem of the side water inlet is separated from the inclined surface of the sliding valve; Step a5, at the same time, the flushing liquid enters along the axial direction, passes through the push valve seat and enters the cavity. Under the throttling effect of the slide column throttle hole, the flushing liquid pushes the exhaust valve slide column to make the exhaust valve ball tightly against the exhaust valve cover ball inclined surface, and the exhaust valve cover hole is closed; Step a6, the flushing liquid flushes the slide valve, and finally enters the directional drilling tool device with a cable core at the front end along the water inlet of the base, and enters the bottom of the hole for circulation; the directional drilling tool device with a cable core is completed, and the continuous circulation of the flushing liquid in the process of the directional drilling tool device with a cable core is realized; Steps for removing the directional drilling tool with cable core: The initial state is: the flushing liquid enters along the axial direction, passes through the push valve seat and enters the cavity. At this time, the exhaust valve cover hole is closed, the slide valve is separated from the slide valve seat, and the flushing liquid finally enters the directional drilling tool device with a cable core at the front end through the base water inlet, and enters the bottom of the hole for circulation; Step b1, the flushing liquid stops entering from the axial direction, and at the same time enters from the side water inlet of the previous drilling tool device to be disassembled. At this time, the end of the valve stem of the side water inlet is tightly in contact with the inclined surface of the sliding valve, the sliding valve and the sliding valve seat are tightly closed, and the flushing liquid enters the directional drilling tool device with the cable core at the front end from the base water inlet, and enters the bottom of the hole for circulation; Step b2, unscrewing the male connector of the directional drilling tool with the cable core to be disassembled from the female connector of the previous directional drilling tool; Step b3, the push valve pushes the valve seat tightly closed under the action of the valve spring, and the inner support ring returns to the initial position under the action of the push valve, completing the disassembly of the directional drilling tool device with the cable core.

10. The construction method of the mining flushing fluid continuous circulation directional drilling tool according to claim 8, characterized in that: Used for wireless measurement while drilling (MWD) directional drilling construction such as mud pulse, including the following steps: Steps for directional drilling equipment without cable core: The initial state is: the flushing liquid enters from the side water inlet, at which time the end of the side water inlet valve stem is in tight contact with the inclined surface of the cable-free slide valve, the cable-free slide valve and the cable-free slide valve seat are tightly closed, and the flushing liquid enters the cable-free directional drilling tool device at the front end from the base water inlet, and enters the bottom of the hole for circulation; Step c1, the male connector of the directional drilling tool device without cable core to be screwed on is gradually connected with the female connector of the directional drilling tool device without cable core, and at this time, the push rod pushes the push valve without cable core, and the push valve without cable core is gradually separated from the push valve seat without cable core; Step c2, the air in the cavity enters through the throttle hole of the sliding column, and pushes the exhaust valve ball to compress the exhaust valve spring, and the gas is discharged from the exhaust valve cover hole; Step c3, the male connector of the directional drilling tool device without cable core to be screwed on is completely connected with the female connector of the directional drilling tool device without cable core, and the push valve without cable core reaches the maximum position; Step c4, the side water inlet stops inletting water, and at this time, under the action of the exhaust valve spring, the end of the valve stem of the side water inlet is separated from the inclined surface of the cable-free sliding valve; Step c5, at the same time, the flushing liquid enters along the axial direction, passes through the cable-free core push valve seat and enters the cavity. Under the throttling effect of the slide column throttle hole, the flushing liquid pushes the exhaust valve slide column to make the exhaust valve ball tightly against the exhaust valve cover ball inclined surface, thereby closing the exhaust valve cover hole; Step c6, the flushing liquid flushes the cable-free core slide valve, and finally enters the cable-free core directional drilling device at the front end along the cable-free core base water inlet, and enters the hole bottom for circulation; the cable-free core directional drilling device is completed, and the continuous circulation of the flushing liquid in the cable-free core directional drilling device process is realized; Steps for removing the directional drilling tool without cable core: The initial state is: the flushing liquid enters along the axial direction, passes through the push valve seat and enters the cavity. At this time, the exhaust valve cover hole is closed, the slide valve is separated from the slide valve seat, and the flushing liquid finally enters the directional drilling tool device with a cable core at the front end through the base water inlet, and enters the bottom of the hole for circulation; Step d1, the flushing liquid stops entering from the axial direction, and at the same time enters from the side water inlet of the previous drilling tool device to be disassembled. At this time, the end of the valve stem of the side water inlet is tightly in contact with the inclined surface of the cable-free sliding valve, the cable-free sliding valve and the cable-free sliding valve seat are tightly closed, and the flushing liquid enters the directional drilling tool device without the cable core at the front end from the water inlet of the cable-free base, and enters the bottom of the hole for circulation; Step d2, unscrewing the male connector of the directional drilling tool device without a cable core to be disassembled from the female connector of the previous directional drilling tool device; Step d3, the cable-free core push valve is tightly closed against the cable-free core push valve seat under the action of the cable-free core push valve spring, thereby completing the disassembly of the cable-free core directional drilling tool device.

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