A pressurizing device for use in a drill pipe and a fluid jetting steering drill

Abstract

The application discloses a kind of pressurizing devices for drill rod, including with the first power device of drill collar connection of drill rod and the second power device of relative rotation arrangement with drill bit, also including the regulating device of connection between first power device and second power device;Under the flow force of drilling fluid, first power device and second power device relatively reverse rotation, second power device is discharged after part of drilling fluid is pressurized by drill bit, realizes unpowered pressurization, the application discloses a kind of fluid jet guiding drilling tool, by applying the pressurizing device on fluid jet guiding drilling tool, thereby using the flow force of drilling fluid to break rock mode guidance, avoid the malpractice of mechanical bias structure failure, with higher reliability and longer service life, its cooperation drill bit rotation mechanical mode joint rock breaking, directional rock breaking is realized, directional drilling speed is greatly improved.

Description

TECHNICAL FIELD

[0001] The present application relates to a rotary steering drilling device in the field of oil drilling engineering, in particular to a booster device used in a drill pipe for hydraulic rock breaking steering drilling, and simultaneously provides a fluid jet steering drilling tool with the booster device. BACKGROUND

[0002] The rotary steering drilling system is an important drilling tool for complex structure wells such as horizontal wells, directional wells and large displacement wells. The rotary steering drilling system reduces the supporting pressure phenomenon by rotating the shell or most of the shell and not rotating a very short part, so as to realize deeper and longer horizontal well and directional well construction. In recent years, the rotary steering drilling system has gradually become a popular steering drilling technology and has become one of the key technologies for efficient drilling. The principle of the rotary steering drilling system is to break rocks in different directions in a controllable and uneven manner to achieve a larger rock breaking amount in a specific direction.

[0003] At present, the rock breaking mode of the rotary steering drilling system is mechanical rock breaking mode, which mainly relies on the side cutting capacity of the drill bit and the steering lateral force. However, the biasing mechanism for generating the lateral force is easily affected by adverse factors such as vibration, impact and rotation, thereby affecting the steering effect and service life of the entire rotary steering drilling system.

[0004] Therefore, how to avoid the failure of the biasing mechanism, or even a steering drilling device without the biasing mechanism and with a simpler and more reliable structure, is a technical problem to be solved by those skilled in the art. SUMMARY

[0005] The present application aims to provide a booster device used in a drill pipe for hydraulic rock breaking steering drilling, which does not require additional power and provides low-pressure drilling fluid for the drilling tool while providing high-pressure directional rock breaking drilling fluid force for the drilling tool. Another purpose of the present application is to provide a fluid jet steering drilling tool with the booster device. The combination of the booster device and the fluid jet steering drilling tool does not require a mechanical biasing mechanism, has a simpler structure, and has the advantages of higher reliability and longer service life.

[0006] To achieve the above-mentioned purpose, the present application provides a booster device used in a drill pipe, which comprises a first power device connected with a drill collar of the drill pipe, a second power device arranged in opposite rotation with a drill bit, and a regulating device connected between the first power device and the second power device. Under the flow force of the drilling fluid, the first power device and the second power device rotate in opposite directions, and the second power device pressurizes part of the drilling fluid and discharges it through the drill bit, thereby realizing power-free pressurization.

[0007] Preferably, the first power device is an upper turbine which rotates under the flow resistance of the drilling fluid.

[0008] More preferably, the second power device comprises: a power turbine, a compression turbine integrated with the power turbine and placed in parallel in the turbine cavity, and a high-pressure nozzle on the drill bit, the bottom of the turbine cavity is communicated to the high-pressure nozzle on the drill bit through the valve piece group, part of the drilling fluid enters the turbine cavity under the action of the power turbine of the second power device, and is pressurized by the compression turbine and then sprayed out through the drill bit;

[0009] The upper turbine and the power turbine automatically rotate under the flow pressure of the drilling fluid, and the rotation directions are opposite.

[0010] Further preferably, the cavity of the turbine cavity is trumpet-shaped from large at the top to small at the bottom, the compression turbine profile is adapted to the cavity of the turbine cavity, the bottom of the turbine cavity is communicated with a high-pressure cavity, the bottom of the high-pressure cavity is rotatably inserted with the drill bit, and the drilling fluid pressurized by the compression turbine flows to the high-pressure nozzle on the drill bit through the high-pressure cavity and is sprayed out.

[0011] Further preferably, the cavity wall of the high-pressure cavity is a double-layer structure, the double-layer structure divides the high-pressure cavity into an inner cavity and an outer cavity, an upper valve piece with a pressure rod is arranged in the inner cavity, and the upper valve piece is attached to a lower valve piece fixed on the drill bit.

[0012] Further preferably, a piston is arranged in the outer cavity, and the piston is provided with an elastic member relative to the inner side of the outer cavity.

[0013] Further preferably, a shunt hole communicating with the high-pressure cavity is arranged on the upper part of the pressure rod, and the lower part of the pressure rod is connected to the upper valve piece through an elastic and telescopic structure in a compressed state, so that the upper valve piece abuts against the lower valve piece with a certain pressure holding force.

[0014] Further preferably, the upper valve piece is a circular valve piece provided with at least one first eccentric through hole, and the lower valve piece is a circular valve piece provided with at least two second eccentric through holes which are uniformly distributed with the center of the valve piece as the center, when the drill bit rotates, the second eccentric through holes are alternately communicated with the first eccentric through holes at a certain frequency, so that the high-pressure fluid in the high-pressure cavity is intermittently sprayed out through the high-pressure nozzle of the drill bit through the communicated first and second eccentric through holes, that is, the upper valve piece is fixed and does not move with the high-pressure cavity, the lower valve piece is arranged on the drill bit and rotates synchronously with the drill bit, so that the second eccentric hole on the upper valve piece intermittently corresponds to the first eccentric hole on the upper valve piece at the rotation speed parameter of the drill bit, when the first eccentric hole and the second eccentric hole are communicated, the high-pressure fluid passes through the communicated holes and is sprayed out through the high-pressure nozzle, when the first eccentric hole and the second eccentric hole are not communicated, the high-pressure fluid is cut off, so as to realize the intermittent spraying of the high-pressure fluid through the high-pressure nozzle.

[0015] Further preferably, the lower valve plate is a circular valve plate provided with second eccentric through holes which are uniformly distributed around the center of the at least three valve plates, and when the drill bit rotates, the second eccentric through holes are alternately communicated with the first eccentric through holes at a certain frequency, so that the high-pressure fluid in the high-pressure cavity is intermittently sprayed out of the high-pressure nozzle of the drill bit through the communicated first and second eccentric through holes.

[0016] Further preferably, a sealing ring structure is arranged at the joint between the high-pressure cavity and the drill bit.

[0017] Further preferably, the regulating device comprises a generator, a stabilizing motor, a measurement and control circuit board and an attitude sensor connected in sequence with the upper turbine, the measurement and control circuit board and the attitude sensor are arranged in an extended shell of the stabilizing motor, and the tail of the extended shell of the stabilizing motor is connected with the power turbine of the second power device.

[0018] The application also discloses a fluid jet guiding drilling tool, which comprises the above-mentioned pressurizing device arranged in a drill rod and further comprises an outer cylinder arranged around the pressurizing device, a drill collar connected to the upper end of the outer cylinder and a drill bit connected to the lower end of the outer cylinder, part of drilling fluid in the inner cavity of the outer cylinder flows out through the low-pressure water eye of the drill bit, and the other part of the drilling fluid flows out through the high-pressure nozzle of the drill bit after being pressurized by the pressurizing device.

[0019] Further preferably, the upper turbine of the pressurizing device is connected to the drill collar through a central shaft and an upper protection cylinder, the lower coil is arranged on the upper part of the central shaft, the lower coil is coaxially arranged with the upper coil in the upper protection cylinder with a gap, and the lower coil and the upper coil are relatively rotatable and are both sealed spiral wires.

[0020] Further preferably, the upper protection cylinder is arranged in the middle of the outer cylinder through an upper protection cylinder centralizer, the central shaft and the upper protection cylinder are jointedly arranged, and the outer periphery of the central shaft is provided with an upper centralizing bearing.

[0021] Further preferably, the outer side of the lower part of the turbine cavity of the pressurizing device is provided with a lower centralizing bearing, and under the flow of the drilling fluid, the pressurizing device is freely rotatable in the inner cavity of the outer cylinder through the upper centralizing bearing at the upper end and the lower centralizing bearing at the lower end.

[0022] Further preferably, under the power of the drill collar, the outer cylinder and the drill bit rotate synchronously.

[0023] Compared with the prior art, the structure of the pressure boosting device in the drill rod is different, two groups of turbines with opposite rotation directions are used, under the action of the flow power of the drilling fluid, part of the drilling fluid is introduced into the turbine cavity for pressure boosting, and the pressurized drilling fluid is intermittently sprayed from the high-pressure nozzle of the drill bit at a certain frequency through the valve plate group, by applying the pressure boosting device on the fluid jet guiding tool, the rock breaking mode is guided by using the flow power of the drilling fluid, the disadvantages of mechanical bias structure failure are avoided, and the reliability and service life are higher, the mechanical mode is combined with the rotation of the drill bit to break rocks, directional rock breaking is realized, and the directional drilling speed is greatly improved. BRIEF DESCRIPTION OF DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced below. Obviously, the drawings in the following description are only embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor on the basis of the provided drawings.

[0025] Figure Figure 1 Figure is a structural schematic view of the pressure boosting device in the drill rod applied on the fluid jet guiding tool;

[0026] Figure Figure 2 Figure Figure 1 Figure is a structural schematic view of the upper valve plate;

[0027] Figure Figure 3 Figure Figure 1 Figure is a structural schematic view of the lower valve plate;

[0028] Figure Figure 4 Figure Figure 1 Figure is a partial enlarged view of part of the high-pressure cavity 18.

[0029] In the drawings: 1, upper protection cylinder, 2, upper protection cylinder centralizer, 3, upper coil, 4, lower coil, 5, upper centralizing bearing, 6, center shaft, 7, upper turbine, 8, generator, 9, stabilizing motor, 10, measurement and control circuit board, 11, attitude sensor, 12, power turbine, 13, compression turbine, 14, turbine cavity, 15, lower centralizing bearing, 16, elastic member, 17, outer cylinder, 18, high-pressure cavity, 19, compression rod, 20, piston, 21, upper valve plate, 22, lower valve plate, 23, drill bit, 24, high-pressure nozzle, 25, low-pressure water hole. DETAILED DESCRIPTION

[0030] The core of this invention is to provide a pressurizing device for use in the drill pipe of hydraulic rock-breaking directional drilling. This pressurizing device requires no additional power and provides low-pressure drilling fluid to the drill string while simultaneously providing high-pressure directional rock-breaking drilling fluid. Another objective of this invention is to provide a fluid jet directional drilling tool with this pressurizing device. By combining the pressurizing device with the fluid jet directional drilling tool, a mechanical biasing mechanism is not required, resulting in a simpler structure and advantages such as higher reliability and longer service life.

[0031] To enable those skilled in the art to better understand the technical solutions of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0032] Example 1:

[0033] like Figures 1-4 As shown, a pressurization device for drill pipe includes a first power unit connected to the drill collar: an upper turbine 7, and a second power unit rotatably arranged opposite to the drill bit 23. The second power unit includes a power turbine 12 and a compression turbine 13 integrally formed with the power turbine 12 and placed in a turbine chamber 14. The bottom of the turbine chamber 14 is connected to a high-pressure nozzle 24 on the drill bit 23 through a valve plate assembly. Under the power of drilling fluid flow, the upper turbine 7 and the power turbine 12 rotate in opposite directions. Part of the drilling fluid enters the turbine chamber 14 under the action of the power turbine 12 of the second power unit, and is pressurized by the compression turbine 13 before being ejected through the drill bit 23, thus achieving pressurization without power.

[0034] To achieve better boosting, the turbine chamber 14 in this embodiment is flared, wider at the top and narrower at the bottom. The power turbine 12 and the compression turbine 13 are composed of multiple axially distributed turbines in a single integrated design, rotating synchronously. The radii of the multiple turbines gradually decrease from the power turbine 12 towards the compression turbine 13, as shown in the attached figure. Figure 1 As shown, the upper part is the power turbine 12, and the lower part is the compression turbine 13. The radius or diameter of any turbine in the turbine assembly that makes up the power turbine 12 is larger than the radius or diameter of any turbine in the compression turbine 13, which facilitates the graded delivery of some of the drilling fluid to the turbine cavity 14. The compression turbine 13 is located in the turbine cavity 14, and the outline of the compression turbine 13 is adapted to the cavity of the turbine cavity 14. This is consistent with the gradually decreasing turbine radius of the compression turbine 13 as described above, and it is shaped like a trumpet with a larger top and a smaller bottom. The bottom of the turbine cavity 14 is connected to the high-pressure cavity 18. The high-pressure cavity 18 is integrated with the turbine cavity 14, and the inner diameter of the high-pressure cavity 18 is smaller than the inner diameter of any position of the turbine cavity 14. The high-pressure cavity 18 is preferably a long tubular cavity, and the bottom of the high-pressure cavity 18 can be rotatably inserted into the drill bit 23. That is, the high-pressure cavity 18 is fixedly set and does not rotate with the rotation of the drill bit 23, nor with the rotation of the power turbine 12 or the compression turbine 13.

[0035] Under the power of the drilling fluid, part of the drilling fluid flows into the low-pressure water eye 25 of the drill bit 23 under the action of the power turbine 12, and the other part of the drilling fluid is guided and pressurized by the compression turbine 13, and then flows to the high-pressure nozzle 24 on the drill bit 23 through the high-pressure cavity 18. In order to ensure that the ejection state is intermittent and has a frequency, the ejection position is fixed, and the cavity wall of the high-pressure cavity 18 is designed as a double-layer structure, as shown in the accompanying drawings. Figure 4 The double-layer structure divides the high-pressure cavity 18 into an inner cavity and an outer cavity, and the inner cavity is provided with an upper valve plate 21 with a pressure rod 19. The upper valve plate 21 is attached to the lower valve plate 22 fixed on the drill bit 23, and the upper valve plate 21 and the lower valve plate 22 form a valve plate group. The upper part of the pressure rod 19 is provided with a shunt hole communicating with the high-pressure cavity 18, and the lower part of the pressure rod 19 is connected to the upper valve plate 21 through an elastic and stretchable structure in a compressed state, so that the upper valve plate 21 is pressed against the lower valve plate 22 with a certain pressure. In the working process, the elastic and stretchable structure in a compressed state between the pressure rod 19 and the upper valve plate 21 can keep the mutual pressing force between the upper valve plate 21 and the lower valve plate 22 unchanged, that is, if the pressure of the drilling fluid flowing to this place is large, the elastic and stretchable structure increases compression and slows down the pressure, and if the pressure of the drilling fluid flowing to this place decreases, the elastic and stretchable structure increases stretching and enhances the pressure, so as to keep the mutual pressing force between the upper valve plate 21 and the lower valve plate 22 unchanged, prevent the mutual pressing force between the two from being insufficient, causing a relative gap and liquid leakage, and prevent the mutual pressing force between the two from being too large, causing the upper valve plate 21 and the lower valve plate 22 to rotate and cause damage due to excessive friction. The upper valve plate 21 is arranged in the inner cavity of the high-pressure cavity 18 through the pressure rod 19, and is fixed relative to the drill bit 23 like the turbine cavity 14, that is, the upper valve plate 21 does not rotate, and the lower valve plate 22 is arranged on the drill bit 23 and rotates with the drill bit 23. The pressurized drilling fluid flows into the upper valve plate 21 through the shunt hole, and then is intermittently discharged through the high-pressure nozzle 24 after entering the upper valve plate 21 and the lower valve plate 22.

[0036] With respect to the above-mentioned middle upper valve plate 21 not rotating relative to the lower valve plate 23, under the centering effect of the upper centering bearing 5 and the lower centering bearing 15, the center shaft 6, the upper turbine 7, the generator 8, the stabilizing motor 9, the control circuit board 10, the attitude sensor 11, the power turbine 12, the compression turbine 13, the turbine cavity 14, the high-pressure cavity 18, the pressure rod 19, and the upper valve plate 21 form a floating connection combined body, which is centrally and stably arranged as a whole. The upper centering bearing 5 and the lower centering bearing 15 are bearing structures, which enable the floating connection combined body to be installed as a whole at the center of the outer cylinder. When the outer cylinder 17 rotates clockwise together with the drill bit 23, the upper valve plate 21 of the floating connection combined body relatively rubs against the lower valve plate 22 on the drill bit 23. Under the action of the friction force and the bearing friction of the upper centering bearing 5 and the lower centering bearing 15 and the self-center inertia of the floating connection combined body, the upper valve plate 21 rotates in the same direction as the outer cylinder 17 at a relatively small speed, which is much smaller than the rotating speed of the outer cylinder 17, and finally forms a clockwise torque A after superposition. However, under the action of the drilling fluid flow force, the upper turbine 7 and the power turbine 12 rotate in opposite directions, which can generate friction torques that cancel each other out. In the present design, the counterclockwise torque is greater than the clockwise torque, so that the torque after mutual cancellation is a counterclockwise torque B, and the clockwise torque A is approximately equal to the counterclockwise torque B. After mutual cancellation, the floating connection combined body is in a stable state.

[0037] Moreover, even if the clockwise torque A and the counterclockwise torque B cannot cancel each other out exactly, the attitude sensor 11 senses the rotating state of the floating connection combined body, and then controls the rotor of the stabilizing motor to generate rotational inertia to reversely cancel the torque difference between the clockwise torque A and the counterclockwise torque B, so as to make the floating connection combined body relatively stable or only have a small amplitude of swing. In turn, the stability of the upper valve plate 21 is ensured, that is, the water jet rock breaking is ensured to be at the same position each time, and water directional rock breaking is achieved.

[0038] In the scheme, the attitude sensor 11 measures the real-time attitude of the drilling tool (the angle with the plumb line, the clockwise angle with the magnetic north pole, etc.), that is, the inclination and azimuth of the drill bit trajectory, which is obtained by measuring the gravity acceleration sensor and the magnetic flux gate sensor, so the stability of the sensor installation position is crucial to the measurement accuracy. As a further preferred embodiment of the present application, in order to keep the pressure in the high-pressure cavity 18 at the upper valve plate 21 stable, a piston 20 is arranged in the outer cavity, and the inner side of the piston 20 is provided with an elastic element 16, which is preferably a spring. Under the preset elastic force of the elastic element 16, the pressure on both sides of the piston 20 is consistent. If the pressure in the high-pressure cavity 18 at the upper valve plate 21 is too large, the piston 20 will rise against the pressure of the elastic element 16, thereby reducing and balancing the pressure in the high-pressure cavity 18 at the upper valve plate 21. If the pressure in the high-pressure cavity 18 at the upper valve plate 21 is too small, it cannot reach the effect of high-pressure jetting drilling fluid, and the piston 20 will drop under the elastic force of the elastic element 16, thereby increasing and balancing the pressure in the high-pressure cavity 18 at the upper valve plate 21, and further ensuring the jetting pressure of the drilling fluid. In order to further optimize the pressure stability in the high-pressure cavity 18 at the upper valve plate 21, a sealing ring structure is arranged at the joint of the high-pressure cavity 18 and the drill bit 23.

[0039] Regarding the guarantee of the jetting pressure of the drilling fluid, the arrangement of the pressure rod 19 and the piston 20 with elastic telescopic structure can have a synergistic effect, and the double structure can guarantee the stability of the jetting pressure of the drilling fluid.

[0040] Regarding the gap and positioning jetting of the high-pressure nozzle 24, the scheme adopted in the present embodiment is that the upper valve plate 21 is a circular valve plate provided with at least one first eccentric through hole, and the lower valve plate 22 is a circular valve plate provided with at least two second eccentric through holes which are uniformly distributed around the center of the lower valve plate 22. When the drill bit 23 rotates, since the upper valve plate 21 does not rotate, the second eccentric through holes and the first eccentric through hole are alternately connected at a certain frequency, so that the high-pressure drilling fluid in the high-pressure cavity 18 is intermittently injected into the high-pressure nozzle 24 of the drill bit 23 through the connected first eccentric through hole and second eccentric through hole. Preferably, the lower valve plate 22 is a circular valve plate provided with at least three second eccentric through holes which are uniformly distributed around the center of the lower valve plate 21. When the drill bit 23 rotates, the second eccentric through holes and the first eccentric through hole are alternately connected at a certain frequency, so that the high-pressure fluid in the high-pressure cavity 18 is intermittently injected into the high-pressure nozzle 24 of the drill bit 23 through the connected first eccentric through hole and second eccentric through hole. In operation, the upper valve plate 21 remains stationary through the turbine cavity 14 or the high-pressure cavity 18, that is, the first eccentric through hole of the upper valve plate 21 is always aligned with the same direction. The position does not change, and the lower valve plate 22 rotates with the drill bit 23. Each second eccentric through hole on the lower valve plate 22 is connected with the first eccentric through hole of the upper valve plate 21 once every revolution, that is, the drill bit 23 sprays high-pressure drilling fluid three times every revolution, and the spraying position does not change. In this way, directional hydraulic pulse rock breaking is achieved.

[0041] Embodiment two:

[0042] The embodiment is based on the embodiment one and adds an intermediate connecting structure. The first power device, the second power device, and the high-pressure cavity 18, the pressure rod 19, the piston 20, the upper valve plate 21, and the lower valve plate 22 are not described here. The embodiment focuses on describing the control device connected between the first power device and the second power device. The control device is further optimized based on the embodiment one, which ensures that the second power device is always in a state of static or small left and right swing, and ensures that the supercharging structure is stable and effective.

[0043] The control device in the embodiment includes the generator 8, the stabilizing motor 9, the measurement and control circuit board 10, and the attitude sensor 11 connected with the upper turbine 7 in sequence. The measurement and control circuit board 10 and the attitude sensor 11 are arranged in the extended shell of the stabilizing motor 9, and the tail of the extended shell of the stabilizing motor 9 is connected with the power turbine 12 of the second power device. The generator 8 is installed on the upper turbine 7. Under the action of the drilling fluid flow power, the upper turbine 7 rotates, thereby driving the generator 8 rotor to generate electricity. The generator 8 generates electricity and supplies power to the stabilizing motor 9. The stabilizing motor 9 can be forward or reverse, thereby controlling the power turbine 12, the compression turbine 13, and the turbine cavity 14 in the second power device to always keep the central position or small amplitude swing. The attitude sensor 11 is located near the power turbine 12 in the second power device, which is used to monitor the attitude, angle, and motion state of the second power device in real time. The measurement and control circuit board 10 receives the signal of the attitude sensor 11 and provides a control signal for the generator 8 and the stabilizing motor 9 through the signal.

[0044] Embodiment three:

[0045] A fluid jet steering drilling tool includes the supercharging device for the drill pipe in the embodiment one or the embodiment two. The specific technical solutions of the supercharging device are described in the embodiment one and / or the embodiment two. The embodiment does not repeat the description. The embodiment focuses on describing the structure cooperating with the device and the technical details of the fluid jet steering drilling tool containing the supercharging device.

[0046] The fluid jetting steering drilling tool in the embodiment further comprises an outer cylinder 17 sleeved on the outer periphery of the pressure boosting device, a drill collar connected to the upper end of the outer cylinder 17, and a drill bit 23 connected to the lower end of the outer cylinder 17. The drill bit 23 is not provided with a high-pressure nozzle 24 and a low-pressure water eye 25. A part of the drilling fluid in the inner cavity of the outer cylinder 17 flows out through the low-pressure water eye 25 of the drill bit 23, and another part of the drilling fluid is pressurized by the pressure boosting device and then flows out through the high-pressure nozzle 24 of the drill bit 23. The inner cavity between the outer cylinder 17 and the pressure boosting device forms a drilling fluid flow cavity. As in the above-mentioned embodiment one, the pressurized drilling fluid in the high-pressure cavity 18 is connected to the high-pressure nozzle 24 of the drill bit 23 through the upper valve plate 21 and the lower valve plate 22, thereby forming a pressurized drilling fluid ejection path.

[0047] In order to ensure the stability of the position of the pressure boosting device in the outer cylinder 17, specifically, the upper turbine 7 in the pressure boosting device is connected to the drill collar through the central shaft 6 and the upper protective cylinder 1. The lower coil 4 is installed on the upper part of the central shaft 6. The lower coil 4 is coaxially arranged with a gap in the upper coil 3 in the upper protective cylinder 1. The lower coil 4 and the upper coil 3 can rotate relative to each other and are both sealed spiral wires. Through the principle of electromagnetic induction, the lower coil 4 and the upper coil 3 transmit signals to each other under the condition of mutual rotation.

[0048] In order to further ensure the stability of the position of the pressure increasing device in the outer cylinder, the upper protection cylinder 1 is centrally arranged relative to the outer cylinder 17 by the upper protection cylinder centralizer 2, the central shaft 6 is inserted into the upper protection cylinder 1, the upper centralizing bearing 5 is arranged on the outer periphery of the central shaft 6, the lower outer side of the turbine cavity 14 in the pressure increasing device is provided with the lower centralizing bearing 15, and under the flow of the drilling fluid, the pressure increasing device is freely rotated in the inner cavity of the outer cylinder 17 through the upper centralizing bearing 5 at the upper end and the lower centralizing bearing 15 at the lower end. Under the power of the drill collar, the outer cylinder 17 rotates synchronously with the drill bit 23. The pressure increasing device does not rotate, the upper turbine 7, the power turbine 12 and the compression turbine 13 in the pressure increasing device rotate under the flow of the drilling fluid, and in the specific work, the turbine cavity 14 and the high-pressure cavity 18 are fixed, the upper valve plate 21 is fixed with the high-pressure cavity 18, that is, the first eccentric through hole of the upper valve plate 21 is always aligned with the same direction, the lower valve plate 22 rotates synchronously with the drill bit 23, and each second eccentric through hole on the lower valve plate 22 corresponds to the first eccentric through hole once in a rotation, so that the high-pressure nozzle sprays the drilling fluid twice or more than twice per rotation of the drill bit, and the spraying position is unchanged, thereby forming the directional hydraulic pulse rock breaking effect. Finally, it should be noted that, in this document, relational terms such as first and second and the like can be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises", "comprising", or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can include other elements not expressly listed or inherent to such process, method, article, or apparatus. An element proceeded by "comprises... a" does not, without more constraints, exclude the existence of additional identical elements in the process, method, article, or apparatus that comprises the element.

[0049] The various embodiments in the specification are described in a progressive manner, and each embodiment focuses on the difference from other embodiments. The same or similar parts between the various embodiments can be referred to each other. For the device disclosed by the embodiments, since it corresponds to the method disclosed by the embodiments, the description is relatively simple, and the relevant part can be referred to the method part.

[0050] The above description of the disclosed embodiments enables a person skilled in the art to implement or use the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A pressure intensifier for use in a drill string, characterized by: The first power device is connected with the drill collar, the second power device is arranged opposite to the drill bit (23), and the regulating device is connected between the first power device and the second power device; The first power device is an upper turbine (7); The second power device comprises a power turbine (12) and a compression turbine (13) which is integrated with the power turbine (12) and placed in a turbine cavity (14); The upper turbine (7) and the power turbine (12) rotate automatically under the flowing pressure of the drilling fluid, and the rotating directions are opposite. The regulating device comprises a generator (8), a stabilizing motor (9), a measurement and control circuit board (10) and an attitude sensor (11) which are connected with the upper turbine (7) in sequence, the measurement and control circuit board (10) and the attitude sensor (11) are arranged in an extended shell of the stabilizing motor (9), and the extended shell of the stabilizing motor (9) is connected with the power turbine (12) of the second power device. The cavity of the turbine cavity (14) is in the shape of an upper large lower small horn, the compression turbine (13) is adapted to the cavity of the turbine cavity (14), the bottom of the turbine cavity (14) is connected with a high-pressure cavity (18), the bottom of the high-pressure cavity (18) is relatively rotatably inserted into the drill bit (23), and the drilling fluid pressurized by the compression turbine (13) flows to the high-pressure nozzle (24) on the drill bit (23) through the high-pressure cavity (18) and is sprayed out. The cavity wall of the high-pressure cavity (18) is a double-layer structure, the double-layer structure divides the high-pressure cavity (18) into an inner cavity and an outer cavity, an upper valve plate (21) with a pressure rod (19) is arranged in the inner cavity, the upper valve plate (21) is attached to a lower valve plate (22) fixed on the drill bit (21), and the upper valve plate (21) and the lower valve plate (22) form the valve plate group.

2. A pressure intensifier for use in a drill rod as defined in claim 1, characterized by: A piston (20) is arranged in the outer cavity, and the piston (20) is provided with an elastic element (16) relative to the inner side of the outer cavity.

3. A supercharging device for use in a drill rod as defined in claim 1, characterized by: A shunt hole of the high-pressure cavity (18) is arranged on the upper part of the pressure rod (19), the lower part of the pressure rod (19) is connected to the upper valve plate (21) through an elastic and telescopic structure in a compressed state, and the upper valve plate (21) is tightly attached to the lower valve plate (22) with a certain pressure holding force.

4. A supercharging device for use in a drill rod as claimed in claim 1 or 3, characterized in that: The upper valve plate (21) is a circular valve plate provided with at least one first eccentric through hole, the lower valve plate (22) is a circular valve plate provided with at least two second eccentric through holes which are uniformly distributed around the center of the lower valve plate (22), when the drill bit (23) rotates, the second eccentric through holes are alternately communicated with the first eccentric through holes at a certain frequency, and the high-pressure fluid in the high-pressure cavity (18) is intermittently sprayed out through the high-pressure nozzle (24) of the drill bit (23) through the communicated first eccentric through hole and second eccentric through hole.

5. A pressure intensifier for use in a drill rod as defined in claim 4, characterized by: The lower valve plate (22) is a circular valve plate provided with at least three second eccentric through holes uniformly distributed around the center of the upper valve plate (22), when the drill bit (23) rotates, the second eccentric through holes are alternately communicated with the first eccentric through holes at a certain frequency, so that the high-pressure fluid in the high-pressure cavity (18) intermittently enters the high-pressure nozzle (24) of the drill bit (23) through the communicated first and second eccentric through holes.

6. A supercharging device for use in a drill rod as defined in claim 1, wherein: The high-pressure cavity (18) is provided with a sealing ring structure at the joint with the drill bit (23).

7. A fluid jetting steering drill, characterized by, The fluid jet guide drilling tool comprises the pressure increasing device for the drill rod as claimed in any one of claims 1-6, and further comprises an outer cylinder (17) sleeved on the outer periphery of the pressure increasing device, a drill collar connected to the upper end of the outer cylinder (17), and a drill bit (23) connected to the lower end of the outer cylinder (17), part of the drilling fluid in the inner cavity of the outer cylinder (17) flows out through the low-pressure water eye (25) of the drill bit (23), and the other part of the drilling fluid is pressurized by the pressure increasing device and then flows out through the high-pressure nozzle (24) of the drill bit (23).

8. A fluid jetting whipstock according to claim 7, wherein: The upper turbine (7) of the pressure increasing device is connected to the drill collar through the central shaft (6) and the upper protection cylinder (1), the lower coil (4) is installed on the upper part of the central shaft (6), the lower coil (4) is coaxially arranged with a gap in the upper coil (3) in the upper protection cylinder (1), the lower coil (4) and the upper coil (3) can rotate relative to each other and are both sealed spiral wires.

9. A fluid jetting whipstock according to claim 8, wherein: The upper protection cylinder (1) is centrally arranged relative to the outer cylinder (17) through the upper protection cylinder centralizer (2), the central shaft (6) and the upper protection cylinder (1) are jointedly arranged, and the outer periphery of the central shaft (6) is provided with an upper centralizing bearing (5).

10. A fluid jetting steering drill according to claim 9, characterized in that: The outer side of the lower part of the turbine cavity (14) is provided with a lower centralizing bearing (15), under the flow of the drilling fluid, the pressure increasing device is freely rotatable in the inner cavity of the outer cylinder (17) through the upper centralizing bearing (5) at the upper end and the lower centralizing bearing (15) at the lower end.

11. A fluid jetting whipstock according to claim 7, wherein: Under the power of the drill collar, the outer cylinder (17) and the drill bit (23) rotate synchronously. Under the power of the drill collar, the outer cylinder (17) and the drill bit (23) rotate synchronously.

Images