Torsion impactor

Abstract

The torsion impactor comprises a shell, a controller and a lower fluid director, and a first cavity is formed in the shell; the controller is installed in the first cavity through a controller base, the controller comprises a first flow channel and a second flow channel which are symmetrically arranged, and the controller base is provided with a third flow channel; the lower fluid director is provided with a first channel communicated with the first flow channel, a second channel communicated with the second flow channel and a third channel communicated with the third flow channel, the periphery of the bottom of the lower fluid director is rotatably sleeved with a steering gear, and the periphery of the steering gear is rotatably sleeved with an impact hammer; the steering gear and the inner wall of the impact hammer form a first fan-shaped space communicated with the first channel and a second fan-shaped space communicated with the second channel, the periphery of the impact hammer is rotatably sleeved with a lower connector, the impact hammer and the lower connector form a first annular space and a second annular space which can be communicated with the third channel, and the lower connector is connected to the bottom of the shell. The defect that a conventional torsion impactor has a dead point can be overcome.

Description

Technical Field

[0001] This invention patent relates to the field of drilling technology, and in particular to a torsion impactor. Background Technology

[0002] With the continuous deepening of oil and gas exploration and development, the number of deep and ultra-deep wells is increasing, with drilling depths in China even exceeding 10,000 meters. The severe stick-slip vibration of drill bits in deep formations and slow mechanical drilling speeds are prominent problems, resulting in short drill bit life and long drilling cycles, seriously restricting the economical and efficient exploitation of oil and gas resources. Torsional impact tools are highly effective in suppressing drill bit stick-slip vibration, protecting the drill bit, improving mechanical rock-breaking efficiency, and thus increasing drilling speed.

[0003] Existing impact tools redirect drilling fluid flow by changing the flow path through a steering mechanism, thereby driving the impact hammer to alternately torsionally impact the drill bit, which is highly effective in increasing speed and efficiency and protecting the drill bit. However, the steering mechanism, as the key component for achieving torsional impact, has a fatal flaw: when the steering mechanism is in the dead position, the torsional impact tool cannot work.

[0004] Therefore, before use, the torsion impact tool often needs to be tested at the wellhead to ensure that the steering gear is not in a dead position, so that the tool can be lowered into the well normally. At the same time, the steering gear rotation and the impact hammer rotation use the same fluid system, and the flow channel cannot be customized for the steering gear and the impact hammer, which is not conducive to the optimal adjustment of fluid energy utilization.

[0005] Therefore, how to overcome the dead point defect of conventional torsional impactors and achieve the goal of independent operation of the steering mechanism and the impact hammer is a technical problem that needs to be solved by those skilled in the art. Summary of the Invention

[0006] The purpose of this invention is to provide a torsion impactor that overcomes the dead point defect of conventional torsion impactors, while enabling the independent operation of the steering mechanism and the impact hammer.

[0007] To achieve the above objectives, the present invention provides a torsion impactor, comprising:

[0008] The shell has a first cavity inside;

[0009] The controller is mounted on the first cavity via a controller base. The controller includes a first flow channel and a second flow channel arranged symmetrically, and the controller base is provided with a third flow channel.

[0010] The lower guide has a first channel connected to the first flow channel, a second channel connected to the second flow channel, and a third channel connected to the third flow channel. A deflector is rotatably fitted on the outer periphery of the bottom of the lower guide, and an impact hammer is rotatably fitted on the outer periphery of the deflector. The inner walls of the deflector and the impact hammer form a first sector space connected to the first channel and a second sector space connected to the second channel. A lower connector is rotatably fitted on the outer periphery of the impact hammer, and the impact hammer and the lower connector form a first annular space and a second annular space that can be connected to the third channel. The lower connector is connected to the bottom of the housing.

[0011] Preferably, it also includes an upper guide vane disposed between the controller and the lower guide vane. The first cavity includes a female connector, a middle inner cavity and a lower inner cavity. The lower connector includes a first section and a second section connected vertically and forming a shoulder. The lower inner cavity is connected to the controller base, the upper guide vane and the first section from top to bottom. The bottom of the housing abuts against the shoulder and is engaged by a boss structure to transmit torque.

[0012] The lower section has a first retaining ring groove on its inner side and a second retaining ring groove on its outer diameter. The retaining ring is installed in the first retaining ring groove and the second retaining ring groove to restrict the axial movement of the lower connector relative to the housing.

[0013] Preferably, the controller base is a Y-shaped cylinder, which includes an upper section with a conical surface and a lower section connected to the bottom of the upper section. The lower section is provided with a support block in the circumferential direction that can fit into the inner side of the lower section cavity. The bottom of the lower section and the top of the upper guide are detachably connected to fix the controller located inside the lower section.

[0014] The conical surface is provided with a drain hole connected to the third flow channel, so that the drilling fluid can flow into the annulus formed by the controller seat and the lower section inner cavity.

[0015] Preferably, the controller includes an intermediate plate with a central flow channel, a first plate and a second plate symmetrically arranged on both sides of the intermediate plate. The central flow channel has a bottle-shaped structure, and a cylindrical block is provided at the bottom of the central flow channel to form the first flow channel and the second flow channel. The first plate and the second plate are each provided with a first feedback channel connected to the first flow channel and a second flow channel and a second feedback channel connected to the second flow channel. The top of the first feedback channel and the second feedback channel are provided with a channel outlet connected to the bottleneck of the central flow channel.

[0016] Preferably, the upper guide tube has a cylindrical structure and contains a first guide channel and a second guide channel. The first guide channel is connected to the bottom of the first feedback channel, and the second guide channel is connected to the bottom of the second feedback channel. The bottoms of the first guide channel and the second guide channel are set at different heights to isolate the drilling fluid phase passing through the first guide channel and the second guide channel.

[0017] Preferably, the lower guide includes a coarse section and a fine section connected vertically. The fine section is a cylindrical body extending into the interior of the first section. The coarse section is provided with a flow channel inlet communicating with the annulus, and the circumferential wall of the fine section is provided with a third channel so that the drilling fluid entering the third channel through the flow channel inlet can flow to the first annular space and the second annular space.

[0018] The bottom of the upper guide is provided with a groove to connect to the thick section. The tops of the first channel and the second channel are set at different heights of the thick section so that the first channel is connected to the first guide channel and the second channel is connected to the second guide channel.

[0019] Preferably, the steering gear is a cylindrical body, and a pair of first sector-shaped protrusions are symmetrically distributed on the outer periphery of the steering gear. The impact hammer is provided with a first sector-shaped groove for engaging and connecting with the first sector-shaped protrusions, so as to form two symmetrically arranged first sector-shaped spaces and two symmetrically arranged second sector-shaped spaces. The first sector-shaped spaces are connected to the first guide channel, and the second sector-shaped spaces are connected to the second guide channel.

[0020] The steering gear also has an inlet channel connected to the third channel and located on the first fan-shaped protrusion, as well as several outlet channels that run through the steering gear. The outlet channels extend along the axial direction of the steering gear and are located on the outer periphery of the first fan-shaped protrusion.

[0021] Preferably, the impact hammer is a cylindrical body, and the outer periphery of the impact hammer is provided with a pair of symmetrically distributed second fan-shaped protrusions. The first fan-shaped groove is located between the two second fan-shaped protrusions. The first section is provided with a second fan-shaped groove for the second fan-shaped protrusions to cooperate and connect, so as to form two symmetrically arranged first annular spaces and two symmetrically arranged second annular spaces. The first fan-shaped groove and the second fan-shaped protrusion are provided with a plurality of liquid inlet channels, which are connected to the first annular space and the second annular space, and the liquid inlet channels are connected to the first fan-shaped protrusion.

[0022] Preferably, the inner wall of the first section is provided with an annular protrusion, and the annular protrusion is provided with a drain seat for supporting the steering gear and the impact hammer. The drain seat is provided with an annular groove communicating with the drain channel, and the annular groove is provided with an opening communicating with the middle of the first end so that the drilling fluid flowing out through the drain channel can be discharged.

[0023] Preferably, the bottom of the lower connector is provided with a connector for connecting the drill bit.

[0024] Compared to the aforementioned background technology, the torsion impactor provided by the present invention includes a housing, a controller, and a lower guide. The housing has a first cavity inside. The controller is mounted on the first cavity via a controller seat. The controller includes a first flow channel and a second flow channel arranged symmetrically. The controller seat has a third flow channel. The lower guide has a first channel communicating with the first flow channel, a second channel communicating with the second flow channel, and a third channel communicating with the third flow channel. A deflector is rotatably fitted around the bottom outer periphery of the lower guide. An impact hammer is rotatably fitted around the outer periphery of the deflector. The inner walls of the deflector and the impact hammer form a first sector space communicating with the first channel and a second sector space communicating with the second channel. A lower connector is rotatably fitted around the outer periphery of the impact hammer. The impact hammer and the lower connector form a first annular space and a second annular space that can communicate with the third channel. The lower connector is connected to the bottom of the housing.

[0025] Specifically, when the drilling fluid flows into the casing, most of it flows along the controller base to the third channel, and then to the third channel in the lower guide vane. A small portion of the drilling fluid flows into the controller and into the first and second channels. Through the Coanda wall effect, the first and second channels alternately generate high and low pressures. The first channel is connected to the first sector space through the first channel, and the second channel is connected to the second sector space through the second channel. Driven by the alternating high and low pressures of the drilling fluid in the first and second channels, the steering mechanism can be driven to rotate back and forth, so that the third channel alternately connects to the first and second annular spaces, and the drilling fluid in the third channel drives the reciprocating motion of the impact hammer. This setting can overcome the defect of dead points in conventional torsional impactors, and at the same time realize the independent operation of the steering mechanism and the impact hammer. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0027] Figure 1 This is a cross-sectional view of the torsion impactor provided in an embodiment of the present invention;

[0028] Figure 2 This is a structural cross-sectional view of the controller provided in an embodiment of the present invention;

[0029] Figure 3 An exploded view of the controller provided in an embodiment of the present invention;

[0030] Figure 4 This is a schematic diagram of the controller provided in another embodiment of the present invention;

[0031] Figure 5 This is a cross-sectional view of the controller base provided in an embodiment of the present invention;

[0032] Figure 6 This is a cross-sectional view of the upper guide vane provided in an embodiment of the present invention;

[0033] Figure 7 This is a cross-sectional view of the lower guide provided in an embodiment of the present invention;

[0034] Figure 8 for Figure 7 Structural cross-sectional view along BB;

[0035] Figure 9 for Figure 7 Structural cross-sectional view along CC;

[0036] Figure 10 This is a bottom view structural schematic diagram of the lower guide provided in an embodiment of the present invention;

[0037] Figure 11 This is a schematic diagram of the steering gear provided in an embodiment of the present invention;

[0038] Figure 12 This is a schematic diagram of the structure of the impact hammer provided in an embodiment of the present invention;

[0039] Figure 13 When in the first state Figure 1 Structural cross-sectional view of AA;

[0040] Figure 14 When in the second state Figure 1 Structural cross-sectional view of AA;

[0041] Figure 15 When in the third state Figure 1 Structural cross-sectional view of AA;

[0042] Figure 16 When in the fourth state Figure 1 A cross-sectional view of the structure of AA.

[0043] in:

[0044] 1-Housing shell, 101-First retaining ring groove;

[0045] 2-Controller, 201-Central Flow Channel, 2011-First Flow Channel, 2012-Second Flow Channel, 202-Feedback Channel, 2021-Channel Inlet, 2022-Channel Outlet, 2031-First Feedback Channel, 2032-Second Feedback Channel;

[0046] 3-Controller base, 301-Drain hole, 302-Support block;

[0047] 4-Upper guide tube, 401-First guide channel, 402-Second guide channel, 403-Tank body;

[0048] 5-Lower guide, 501-Slim section, 502-Coarse section, 5021-Flow channel inlet, 5022-Second channel, 5023-First channel;

[0049] 6-Diverter, 601-First sector-shaped protrusion, 6011-Drainage channel, 6012-Liquid inlet channel, 6701-First sector-shaped space, 6702-Second sector-shaped space;

[0050] 7-Impact hammer, 701-Second sector-shaped protrusion, 7011-Liquid inlet channel, 702-First sector-shaped groove, 7801-First annular space, 7802-Second annular space;

[0051] 8-Lower connector, 801-Second retaining ring groove;

[0052] 9-Drainage seat. Detailed Implementation

[0053] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0054] To enable those skilled in the art to better understand the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0055] In the description of this invention, it should be understood that the terms "upper," "lower," "left," "right," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the position or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations of this invention.

[0056] The purpose of this invention is to provide a torsion impactor that can overcome the defect of dead points in conventional torsion impactors, while enabling the independent operation of the steering device 6 and the impact hammer 7.

[0057] Please see Figure 1 , Figure 13 , Figure 14 , Figure 15 and Figure 16To achieve the above objectives, the present invention provides a torsion impactor, comprising a housing 1, a controller 2, and a lower guide 5.

[0058] The housing 1 has a first cavity inside.

[0059] The controller 2 is installed in the first cavity via the controller base 3. The controller 2 is entirely seated inside the controller base 3. The controller 2 includes a first flow channel 2011 and a second flow channel 2012 arranged symmetrically. The controller base 3 is provided with a third flow channel.

[0060] The lower guide 5 is provided with a first channel 5023 connected to the first flow channel 2011, a second channel 5022 connected to the second flow channel 2012, and a third channel connected to the third flow channel. A deflector 6 is rotatably fitted on the outer periphery of the bottom of the lower guide 5. An impact hammer 7 is rotatably fitted on the outer periphery of the deflector 6. The inner walls of the deflector 6 and the impact hammer 7 form a first sector space 6701 connected to the first channel 5023 and a second sector space 6702 connected to the second channel 5022. A lower connector 8 is rotatably fitted on the outer periphery of the impact hammer 7. The impact hammer 7 and the lower connector 8 form a first annular space 7801 and a second annular space 7802 that can be connected to the third channel. The lower connector 8 is connected to the bottom of the housing 1. The upper end of the housing 1 has a female connector connected to the upper drill string. The bottom of the lower connector 8 is provided with a connector for connecting the drill bit.

[0061] When the drilling fluid flows into the housing 1, most of the drilling fluid flows along the controller base 3 to the third flow channel, and then to the third channel in the lower guide 5. A small portion of the drilling fluid flows into the controller 2 and into the first flow channel 2011 and the second flow channel 2012. Through the Coanda wall effect, the first flow channel 2011 and the second flow channel 2012 can alternately generate high pressure and low pressure. The first flow channel 2011 is connected to the first sector space 6701 through the first channel 5023, and the second flow channel 2012 is connected to the second sector space 6702 through the second channel 5022. Driven by the alternating high and low pressure of the drilling fluid in the first flow channel 2011 and the second flow channel 2012, the steering device 6 can be driven to rotate back and forth, so that the third channel is alternately connected to the first annular space 7801 and the second annular space 7802, and the drilling fluid in the third channel drives the reciprocating motion of the impact hammer 7. This setting can overcome the defect of dead point in conventional torsional impactors, and at the same time realize the independent operation of the steering device 6 and the impact hammer 7.

[0062] Please see Figure 6The torsion impactor also includes an upper guide 4 disposed between the controller 2 and the lower guide 5. The upper parts of the upper guide 4 and the lower guide 5 are concentrically fitted and located between the lower connector 8 and the controller seat 3. The lower part of the lower guide 5 is inserted into the upper section of the inner cavity of the lower connector 8. Between the lower part of the lower guide 5 and the upper section of the inner cavity of the lower connector 8, from the inside out, are the commutator and the impact hammer 7. The lower part of the lower guide 5, the commutator and the impact hammer 7 are concentrically fitted and sit on the following drain seat 9.

[0063] The first cavity includes a female connector, a middle inner cavity, and a lower inner cavity. The lower connector 8 includes a first section and a second section that are connected vertically and form a shoulder. The lower inner cavity is connected to the controller seat 3, the upper guide 4, and the first section from top to bottom. The bottom of the housing 1 abuts against the shoulder and is engaged by a boss structure to transmit torque. The inner side of the lower inner cavity is provided with a first retaining ring groove 101, and the outer diameter of the first section is provided with a second retaining ring groove 801. The retaining ring is installed in the first retaining ring groove 101 and the second retaining ring groove 801 to restrict the axial movement of the lower connector 8 relative to the housing 1, so as to prevent the drill bit from falling to the bottom of the well when the drill string is lifted.

[0064] Please see Figure 5 In this embodiment, the controller base 3 is a Y-shaped cylinder. The controller base 3 includes an upper section with a conical surface and a lower section connected to the bottom of the upper section. The lower section is provided with support blocks 302 that can fit into the inner side of the lower section cavity. The support blocks 302 can adopt a fan-shaped structure and are preferably arranged in two layers at intervals in the lower section circumferentially. The number of support blocks 302 in each row is n (n is 2 to 6). The outer diameter of the support blocks 302 is equal to the inner diameter of the lower section cavity of the housing 1 for the installation and fixing of the controller 2. The bottom of the lower section and the top of the upper guide 4 are detachably connected to fix the controller 2 located inside the lower section. The bottom of the lower section and the upper guide 4 are preferably threaded. The conical surface is provided with a drain hole 301 that communicates with the third flow channel so that most of the drilling fluid can flow into the annulus formed by the controller base 3 and the lower section cavity.

[0065] Please see Figure 2 , Figure 3 and Figure 4 The controller 2 includes an intermediate plate with a central flow channel 201, a first plate and a second plate symmetrically arranged on both sides of the intermediate plate. The central flow channel 201 has a bottle-shaped structure, and a cylindrical block is provided at the bottom of the central flow channel 201 to form a first flow channel 2011 and a second flow channel 2012. The first plate and the second plate are each provided with a first feedback channel 2031 connected to the first flow channel 2011, and a second feedback channel 2032 connected to the second flow channel 2012. The top of the first feedback channel 2031 and the second feedback channel 2032 is provided with a channel outlet 2022 connected to the bottleneck of the central flow channel 201.

[0066] Controller 2 is a modified bistable jet injector, based on the Coanda wall effect. The central flow channel 201 of controller 2 is bottle-shaped. The pressure feedback channel 202 includes the aforementioned first feedback channel 2031 and second feedback channel 2032, both of which are circular channels. The inlet 2021 of the pressure feedback channel 202 is located in the lower part of the bottle, near the corresponding first flow channel 2011 and second flow channel 2012. The outlet 2022 of the pressure feedback channel 202 is located at the bottleneck, allowing the drilling fluid flow to be more easily pushed to the opposite branch channel, thus achieving a change in the drilling fluid flow path. The first feedback channel 2031 and the second feedback channel 2032 each have two return outlets, located at the lower end of controller 2, which are connected to the pressure feedback channel 202 of controller 2. The return fluid outlet is guided by the upper guide 4 and the lower guide 5, and is connected to the first sector space 6701 and the second sector space 6702 respectively. The change of drilling fluid flow channel in the controller 2 (the pressure of the first flow channel 2011 and the second flow channel 2012) is guided by the return fluid outlet, the upper guide 4 and the lower guide 5 to cause the alternating high and low pressure of the first sector space 6701 and the second sector space 6702, which drives the converter to swing circumferentially.

[0067] It should be noted that after the increased liquid pressure in the first sector space 6701 or the second sector space 6702 causes the converter to oscillate circumferentially, the drainage channel at the bottom of the enlarged first sector space 6701 or the second sector space 6702 connects to the annular groove below to discharge its drilling fluid. The smaller second sector space 6702 or the first sector space 6701 is not connected to the annular groove. Under the pressure change of the first flow channel 2011 and the second flow channel 2012, the pressure begins to increase. The converter oscillates to interrupt the connection between the drainage channel at the bottom of the enlarged first sector space 6701 or the second sector space 6702 and the annular groove below, and connect the smaller second sector space 6702 or the first sector space 6701 to the annular groove to discharge the drilling fluid. This process is repeated.

[0068] Please see Figure 6 It is understood that the upper guide tube 4 is a cylindrical structure with a thicker top and a thinner bottom. The upper guide tube 4 has a first guide channel 401 and a second guide channel 402. The first guide channel 401 is connected to the bottom of the first feedback channel 2031, and the second guide channel 402 is connected to the bottom of the second feedback channel 2032. The first guide channel 401 is an inclined channel to communicate with the groove 403 provided at the bottom of the upper guide tube 4. The lower outlet of the second guide channel 402 is located above the shoulder of the upper guide tube 4 where the groove 403 is provided. The bottoms of the first guide channel 401 and the second guide channel 402 are set at different heights to isolate the drilling fluid phase passing through the first guide channel 401 and the second guide channel 402.

[0069] Please see Figure 7 , Figure 8 , Figure 9 and Figure 10 In this embodiment, the lower guide 5 includes a coarse section 502 and a fine section 501 connected vertically. The fine section 501 is a cylindrical body extending into the interior of the first section. The coarse section 502 has two symmetrical fan-shaped grooves. The bottom of the fan-shaped grooves is provided with a flow channel inlet 5021 that connects to the annular space, which facilitates the flow of fluid into the interior of the cylinder. The circumferential wall of the fine section 501 is provided with a third channel, so that the drilling fluid entering the third channel through the flow channel inlet 5021 can flow to the first annular space 7801 and the second annular space 7802, providing high pressure to drive the impact hammer 7 to rotate. The bottom of the upper guide 4 is provided with a groove 403 to connect the coarse section 502. The tops of the first channel 5023 and the second channel 5022 are set at different heights of the coarse section 502, so that the first channel 5023 connects to the first guide channel 401 and the second channel 5022 connects to the second guide channel 402.

[0070] Two concentric cylindrical grooves with progressively smaller inner diameters are provided in the middle of the upper end face of the thicker section 502. The thicker cylindrical groove at the top is connected to the second guide channel 402 on the upper guide 4. A pair of symmetrical second channels 5022 are provided on the side of the thicker cylindrical groove at the top. The second channels 5022 are connected to the second fan-shaped space 6702 formed by the steering gear 6 and the impact hammer 7. The thinner cylindrical groove at the top is connected to the first guide channel 401 on the upper guide 4. A pair of symmetrical first channels 5023 are provided on the side of the thinner cylindrical groove at the top. The first channels 5023 are connected to the first fan-shaped space 6701 formed by the steering gear 6 and the impact hammer 7.

[0071] Please see Figure 11 In this embodiment, the steering gear 6 is a cylindrical body. A pair of first sector-shaped protrusions 601 are symmetrically distributed on the outer periphery of the steering gear 6. The impact hammer 7 is provided with a first sector-shaped groove 702 for engaging with the first sector-shaped protrusions 601 to form two symmetrically arranged first sector-shaped spaces 6701 and two symmetrically arranged second sector-shaped spaces 6702. The first sector-shaped spaces 6701 are connected to the first guide channel 401, and the second sector-shaped spaces 6702 are connected to the second guide channel 402. When the two first flow channels 2011 and the second flow channel 2012 of the controller 2 alternately generate high and low pressure, the steering gear 6 is pushed to turn.

[0072] It should be noted that the alternating high and low pressure generated by the first flow channel 2011 and the second flow channel 2012 is based on the Coanda wall effect. When the fluid passes through the controller 2 flow channel, it does not flow symmetrically downwards, but rather deviates towards one side of the wall, causing the fluid to either tend to flow towards the first flow channel 2011 or towards the second flow channel 2012. When it tends to flow towards the first flow channel 2011, the first flow channel 2011 generates high pressure, while the second flow channel 2012 generates low pressure. At this time, the first feedback channel 2031 is high pressure, the second feedback channel 2032 is low pressure, the return outlet of the first feedback channel 2031 is high pressure, and the return outlet of the second feedback channel 2032 is also low pressure. When the feedback channels feed back to the channel outlet 2022, the inlet of the bottle-shaped flow channel neck near the wall of the first flow channel 2011 (left side) also generates high pressure, pushing the fluid to flow towards the second flow channel 2012 (right side). At this point, the fluid tends to flow into the second flow channel 2012. The second feedback channel 2032 on the second flow channel 2012 side is at high pressure, while the first feedback channel 2031 on the first flow channel 2011 side is at low pressure. After feedback from the second feedback channel 2032 on the second flow channel 2012 side, the fluid is pushed to flow to the left again. This process repeats, thus achieving the alternating high and low pressure at the return outlet.

[0073] The steering gear 6 is also provided with an inlet channel 6012 connected to the third channel and located on the first fan-shaped protrusion 601, and a plurality of drain channels 6011 penetrating the steering gear 6. When a pair of inlet channels 6012 are connected to one of the first annular space 7801 and the second annular space 7802, high-pressure fluid is provided to the fan-shaped cavity to drive the impact hammer 7 to rotate. Each first fan-shaped protrusion 601 has two drain channels 6011 symmetrically distributed near the edge, extending along the axial direction of the steering gear 6 (through from the top to the bottom) and located on the outer periphery of the first fan-shaped protrusion 601, for depressurization of the corresponding first annular space 7801 and second annular space 7802.

[0074] Please see Figure 12The impact hammer 7 is a cylindrical body. A pair of symmetrically distributed second fan-shaped protrusions 701 are provided on the outer periphery of the impact hammer 7. A first fan-shaped groove 702 is located between the two second fan-shaped protrusions 701. The first section is provided with a second fan-shaped groove for mating and connecting with the second fan-shaped protrusions 701, forming two symmetrically arranged first annular spaces 7801 and two symmetrically arranged second annular spaces 7802. The first fan-shaped groove 702 and the second fan-shaped protrusions 701 are provided with a plurality of liquid inlet channels 7011. 011 is connected to the first annular space 7801 and the second annular space 7802, and the fluid inlet channel 7011 is connected to the first fan-shaped protrusion 601. When the drilling fluid flows along the fluid inlet channel 7011 to the corresponding first annular space 7801, the first annular space 7801 is under high pressure and the second annular space 7802 is under low pressure. When the drilling fluid flows along the fluid inlet channel 7011 to the corresponding second annular space 7802, the second annular space 7802 is under high pressure and the first annular space 7801 is under low pressure.

[0075] The inner wall of the first section of the lower connector 8 is provided with an annular protrusion. The annular protrusion is provided with a drain seat 9 for supporting the steering gear 6 and the impact hammer 7. The drain seat 9 is provided with an annular groove that communicates with the drain channel 6011, and the annular groove is provided with an opening that communicates with the middle of the first end so that the drilling fluid flowing out through the drain channel 6011 can be discharged.

[0076] The working method is as follows: the drilling fluid enters the controller base 3 through the female connector at the top of the housing 1. Most of the drilling fluid will enter the annulus formed by the controller base 3 and the inner cavity of the housing 1 through the drain hole 301 on the upper conical surface of the Y-shaped cylinder of the controller base 3, and then enter the inner cavity of the narrow section 501 of the lower guide 5 through the inlet 5021 of the flow channel of the lower guide 5. A small part of the drilling fluid enters the controller 2. Under the modulation of the controller 2, the fluid is first biased towards the first flow channel 2011 or the second flow channel 2012 (taking the first flow channel 2011 as an example). The first feedback channel 2031 connected to the first flow channel 2011, the first guide channel 401 of the upper guide 4, the first channel 5023 of the lower guide 5, the first fan-shaped protrusion 601 of the diverter 6 and the first fan-shaped groove 702 of the impact hammer 7 are in a high-pressure state. Figure 13(First state). The second feedback channel 2032 connected to the second flow channel 2012 of controller 2, the second flow channel 402 of upper guide 4, the second channel 5022 of lower guide 5, the second sector-shaped space 6702 formed by the first sector-shaped protrusion 601 of diverter 6 and the first sector-shaped groove 702 of impact hammer 7 is at low pressure. Diverter 6 rotates in a certain direction (e.g., clockwise) under the action of high and low pressure. After rotation, the liquid inlet channel 6012 of controller 2 and the liquid inlet channel 7011 of impact hammer 7 are connected. At this time, the pair of first annular spaces 7801 formed by the second sector-shaped protrusion 701 of impact hammer 7 and the inner cavity of lower connector 8 connected to the liquid inlet channel 7011 are at high pressure. Figure 14 (Second state). The second pair of second annular spaces 7802 formed by the second sector-shaped protrusion 701 of the impact hammer 7 and the inner cavity of the lower connector 8 are connected to the venting channel 6011 on the side of the first sector-shaped protrusion 601 of the steering gear 6, forming a low-pressure area. Under the action of high and low pressure, the impact hammer 7 rotates the steering gear 6 counterclockwise, realizing a counterclockwise circumferential impact on the lower connector 8. Figure 15 (Third state). Controller 2 deflects the fluid, causing the high and low pressure zones formed by the first sector-shaped protrusion 601 of the steering device 6 and the first sector-shaped groove 702 of the impact hammer 7 to interchange. At this time, the second sector-shaped space 6702 is high pressure, and the first sector-shaped space 6701 is low pressure. Controller 2 rotates counterclockwise under the push of high and low pressure. Figure 16 (Fourth state). After rotation, the inlet channel 6012 of the steering gear 6 and the other pair of inlet channels 7011 of the impact hammer 7 are connected, causing a high-low pressure conversion between the two pairs of annular spaces formed by the second fan-shaped protrusion 701 of the impact hammer 7 and the inner cavity of the lower connector 8. At this time, the second annular space 7802 is high pressure and the first annular space 7801 is low pressure. Under the action of high and low pressure, the impact hammer 7 rotates the steering gear 6 clockwise, realizing a clockwise circumferential impact on the lower connector 8. Figure 13 (First state). This achieves a circumferential impact on the lower connector 8, and thus on the drill bit, in the opposite direction. As the above process is repeated continuously, a continuous circumferential impact on the drill bit is achieved.

[0077] It should be noted that in this specification, relational terms such as first and second are used only to distinguish one entity from several other entities, and do not necessarily require or imply any such actual relationship or order between these entities.

[0078] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0079] This article uses specific examples to illustrate the principles and implementation methods of the present invention. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of the present invention. It should be noted that those skilled in the art can make several improvements and modifications to the present invention without departing from the principles of the present invention, and these improvements and modifications also fall within the protection scope of the present invention.

Claims

1. A torsion impactor characterized by, The application relates to a drilling fluid flow control device. The device comprises a housing with a first cavity inside; a controller installed in the first cavity through a controller seat, the controller comprising symmetrically arranged first and second flow channels, and the controller seat being provided with a third flow channel; a lower flow guide provided with a first passage connected to the first flow channel, a second passage connected to the second flow channel, and a third passage connected to the third flow channel, the bottom of the lower flow guide being rotatably sleeved with a deflector, the outer periphery of the deflector being rotatably sleeved with an impact hammer, the inner wall of the deflector and the impact hammer forming a first fan-shaped space connected to the first passage and a second fan-shaped space connected to the second passage, the outer periphery of the impact hammer being rotatably sleeved with a lower connector, and the impact hammer and the lower connector forming a first annular space and a second annular space capable of being connected to the third passage, and the lower connector being connected to the bottom of the housing. The device further comprises an upper flow guide arranged between the controller and the lower flow guide, the first cavity comprises a female connector, a middle cavity and a lower cavity, the lower connector comprises a first section and a second section which are connected to each other and form a shoulder, the lower cavity is connected to the controller seat, the upper flow guide and the first section in sequence from top to bottom, the bottom of the housing abuts against the shoulder and is engaged through a convex-concave structure to transmit torque. The inner side of the lower cavity is provided with a first snap ring groove, the outer diameter of the first section is provided with a second snap ring groove, and a snap ring is installed in the first and second snap ring grooves to limit the axial movement of the lower connector relative to the housing.

2. The torsion impactor of claim 1, wherein, The controller seat is a Y-shaped cylinder, the controller seat comprises an upper section with a conical surface and a lower section connected to the bottom of the upper section, the periphery of the lower section is provided with a support block capable of being attached to the inner side of the lower cavity, and the bottom of the lower section and the top of the upper flow guide are detachably connected to fix the controller inside the lower section. A drain hole is arranged on the conical surface and connected to the third flow channel to allow the drilling fluid to flow into the annulus formed by the controller seat and the lower cavity.

3. The torsion impactor of claim 2, wherein, The controller comprises a middle plate body provided with a central flow channel, first and second plate bodies symmetrically arranged on both sides of the middle plate body, the central flow channel is in a bottle-shaped structure, the bottom of the central flow channel is provided with a cylindrical plug body to form the first and second flow channels, the first and second plate bodies are both provided with a first feedback passage connected to the first flow channel and a second feedback passage connected to the second flow channel, and the top of the first and second feedback passages is provided with a passage outlet connected to the bottleneck of the central flow channel. The upper flow guide is in a cylindrical structure, the upper flow guide has a first flow channel and a second flow channel, the first flow channel is connected to the bottom of the first feedback passage, the second flow channel is connected to the bottom of the second feedback passage, and the bottoms of the first and second flow channels are arranged at different heights to isolate the drilling fluids passing through the first and second flow channels.

4. The torsion impactor of claim 1, wherein, ​ 5. The torsion impactor of claim 3, wherein, ​ 6. The torsion impactor of claim 5, wherein, The lower flow director comprises an upper and lower connected thick section and thin section, the thin section is a cylindrical barrel extending to the inside of the first section, the thick section is provided with a flow passage inlet communicating with the annulus, and the third passage is provided on the circumferential wall of the thin section, so that the drilling fluid entering the third passage through the flow passage inlet can flow to the first and second annular spaces; The upper flow director is provided with a groove at the bottom to connect the thick section, and the top of the first and second passages is arranged at different heights of the thick section, so that the first passage communicates with the first flow channel, and the second passage communicates with the second flow channel.

7. The torsion impactor of claim 1, wherein, The diverter is a cylindrical barrel, and a pair of first fan-shaped protrusions is symmetrically distributed on the outer periphery of the diverter, the impact hammer is provided with a first fan-shaped groove for matched connection with the first fan-shaped protrusions, to form two symmetrically arranged first fan-shaped spaces and two symmetrically arranged second fan-shaped spaces, the first fan-shaped space communicates with the first flow channel, and the second fan-shaped space communicates with the second flow channel. The diverter is further provided with a liquid inlet flow channel communicating with the third passage and located at the first fan-shaped protrusion, and a plurality of drainage passages penetrating the diverter, the drainage passages extend axially along the diverter and are located at the outer periphery of the first fan-shaped protrusion.

8. The torsion impactor of claim 7, wherein, The impact hammer is a cylindrical barrel, and a pair of symmetrically distributed second fan-shaped protrusions is arranged on the outer periphery of the impact hammer, the first fan-shaped groove is located between the two second fan-shaped protrusions, the first section is provided with a second fan-shaped groove for matched connection with the second fan-shaped protrusions, to form two symmetrically arranged first annular spaces and two symmetrically arranged second annular spaces, the first fan-shaped groove and the second fan-shaped protrusion are provided with a plurality of liquid inlet passages, the liquid inlet passages communicate with the first and second annular spaces, and the liquid inlet passages communicate with the first fan-shaped protrusion.

9. The torsion impactor of claim 7, wherein, The inner wall of the first section is provided with an annular protrusion, the annular protrusion is provided with a drainage seat for supporting the diverter and the impact hammer, the drainage seat is provided with an annular groove communicating with the drainage passage, and the annular groove is provided with an opening communicating with the middle part of the first end, to allow the drilling fluid flowing through the drainage passage to flow out.

10. The torsion impactor of claim 1, wherein, The bottom of the lower joint is provided with a joint for connecting a drill bit.

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