Pulse jet flow rotary percussion drilling tool

Abstract

The invention provides a pulse jet rotary percussion drilling tool which comprises a first connector assembly, a shell assembly, a pulse assembly, an impeller assembly and a second connector assembly, and the first connector assembly is provided with a first flow channel; the shell assembly is connected with the first connector assembly, and the shell assembly is provided with a second flow channel communicating with the first flow channel; at least one part of the pulse assembly is movably arranged in the second flow channel and can move in the axial direction of the shell assembly and / or rotate relative to the shell assembly. The impeller assembly is arranged in the first flow channel, so that drilling fluid in the first flow channel intermittently passes through the impeller assembly and impacts the pulse assembly; at least one part of the second connector assembly is arranged in the second flow channel and located at the end, away from the first connector assembly, of the pulse assembly, and the pulse assembly can provide axial and / or circumferential acting force for the second connector assembly. The problem that in the prior art, a static load rock breaking mode is low in drilling efficiency is solved.

Description

Technical Field

[0001] The invention relates to the technical field of oil and gas exploration and development, and in particular to a pulse jet rotary drilling tool. Background Art

[0002] In the prior art, conventional oil drilling tools usually use a static load rock breaking method for drilling. The static load rock breaking method is to achieve a pressure holding effect on the bottom hole drill bit through static drilling pressure. The drill bit only bears and transmits static loads. The cutting teeth on the drill bit have a weak ability to eat into rocks, which affects the efficiency of oil and gas exploration and development drilling. Summary of the invention

[0003] The main purpose of the present invention is to provide a pulse jet rotary percussion drilling tool to solve the problem of low efficiency of drilling in the static load rock breaking mode in the prior art.

[0004] In order to achieve the above-mentioned purpose, according to one aspect of the present invention, a pulse jet rotary drilling tool is provided, comprising a first joint assembly, a shell assembly, a pulse assembly, an impeller assembly and a second joint assembly, wherein the first joint assembly has a first flow channel; the shell assembly is connected to the first joint assembly, and the shell assembly has a second flow channel connected to the first flow channel; at least a part of the pulse assembly is movably arranged inside the second flow channel and can move axially along the shell assembly and / or rotate relative to the shell assembly; the impeller assembly is arranged inside the first flow channel so that the drilling fluid in the first flow channel intermittently passes through the impeller assembly and impacts the pulse assembly; at least a part of the second joint assembly is arranged inside the second flow channel and is located at one end of the pulse assembly away from the first joint assembly, the second joint assembly has a third flow channel connected to the second flow channel, and the pulse assembly can provide axial and / or circumferential force to the second joint assembly.

[0005] Furthermore, an end of the first flow channel close to the shell component has a diameter-reducing section, and the diameter of the first flow channel decreases in a direction close to the shell component.

[0006] Furthermore, an inner side wall of one end of the first flow channel close to the shell assembly has a first step surface, so that the diameter of the first flow channel decreases in a direction close to the shell assembly.

[0007] Furthermore, the impeller assembly includes an impeller body, which is rotatably disposed inside the first flow channel, and the axial direction of the impeller body is perpendicular to the length direction of the first flow channel.

[0008] Furthermore, the impeller assembly also includes a guide body and an impeller seat, wherein the guide body is arranged on a side of the impeller body away from the pulse assembly, and the guide body has a guide slope so that the drilling fluid flowing through the guide slope can impact the impeller body along the tangential direction of the impeller body; and / or the impeller seat is connected to the first joint assembly, and the impeller body is rotatably arranged on the impeller seat.

[0009] Furthermore, the pulse assembly includes a pressure transmission rod and a rotor hammer, wherein the pressure transmission rod is movably arranged inside the second flow channel and can move axially along the shell assembly; the rotor hammer is connected to an end of the pressure transmission rod away from the impeller assembly, and the circumferential side wall of the rotor hammer has a plurality of rotors spirally arranged along the length direction of the second flow channel. When the drilling fluid in the second flow channel impacts the rotor, the rotor hammer drives the pressure transmission rod to rotate.

[0010] Furthermore, the pulse jet rotary drilling tool also includes a reset member and a bearing assembly. The reset member is sleeved on the end of the pressure transmission rod away from the rotor hammer, and the two ends of the reset member are respectively abutted against the bearing assembly and the housing assembly. The end of the pressure transmission rod away from the rotor hammer has a lap flange, which abuts against the bearing assembly, and the drilling fluid in the first flow channel can impact the lap flange after entering the second flow channel to make the pressure transmission rod move axially along the housing assembly.

[0011] Furthermore, the shell assembly includes an intermediate joint and a shell body, wherein the reset piece abuts against the intermediate joint, and an end of the pressure transmission rod away from the rotor hammer is arranged inside the intermediate joint; the shell body is connected to the first joint assembly through the intermediate joint, and an end of the second joint assembly away from the pulse assembly extends out of the shell body.

[0012] Further, the second flow channel includes a first connecting section and a second connecting section, the first connecting section is connected to the first flow channel, the second connecting section is connected to the third flow channel, at least a portion of the pressure transmission rod is arranged between the first connecting section and the second connecting section and separates the first connecting section and the second connecting section, and the interior of the pressure transmission rod has a first sub-flow channel, and both ends of the first sub-flow channel are respectively connected to the first connecting section and the second connecting section.

[0013] Furthermore, a circumferential side wall of the pressure transmission rod close to the second connecting section has a liquid outlet hole, and the first sub-channel is connected with the second connecting section through the liquid outlet hole.

[0014] Furthermore, a rotation gap is provided between the rotor and the inner wall of the second flow channel.

[0015] Furthermore, the second joint assembly includes a hammer seat and a joint part, wherein the pulse assembly can provide axial and / or circumferential force to the hammer seat; the joint part is connected to an end of the hammer seat away from the pulse assembly, and the joint part has a third flow channel.

[0016] Furthermore, the third flow channel includes a third connecting section and a fourth connecting section, the third connecting section is connected to the second flow channel, and the pulse jet rotary drilling tool also includes an anti-drop joint, one end of the anti-drop joint is located inside the shell assembly, and the other end of the anti-drop joint extends out of the shell assembly, and the part of the joint having the fourth connecting section passes through the anti-drop joint.

[0017] Furthermore, the joint part includes an anti-drop shaft and a lower joint, wherein the anti-drop shaft has a third connecting section and is connected to the hammer seat; the lower joint has a fourth connecting section and is connected to the anti-drop shaft, the anti-drop joint has a through hole for the lower joint to pass through, the outer diameter of the anti-drop shaft is larger than the inner diameter of the through hole, and the inner wall of the anti-drop joint has a second step surface, and the lower joint has a clamping surface that cooperates with the second step surface.

[0018] The technical solution of the present invention is applied, by comprising a pulse jet rotary drilling tool, including a first joint assembly, a shell assembly, a pulse assembly, an impeller assembly and a second joint assembly, the first joint assembly having a first flow channel; the shell assembly is connected to the first joint assembly, the shell assembly having a second flow channel connected to the first flow channel; at least a part of the pulse assembly is movably arranged inside the second flow channel and can move axially along the shell assembly and rotate relative to the shell assembly; the impeller assembly is arranged inside the first flow channel, so that the drilling fluid in the first flow channel intermittently passes through the impeller assembly and impacts the pulse assembly; at least a part of the second joint assembly is arranged inside the second flow channel and is located at an end of the pulse assembly away from the first joint assembly, the second joint assembly has a third flow channel connected to the second flow channel, and the pulse assembly can provide axial and circumferential forces for the second joint assembly.

[0019] The impeller assembly in the present invention causes the drilling fluid in the first flow channel to produce a periodically changing jet pressure, which intermittently impacts the pulse assembly. The pulse assembly can move along the axial direction of the shell assembly and rotate relative to the shell assembly, so that the pulse assembly intermittently rotates and impacts the second joint assembly, generating a spin load on the second joint assembly. The spin load is introduced into the bottom hole drill bit. The spin load generated on the drill bit is used to crush rocks, so that cracks or fissures on the rock surface continue to expand, reduce the mechanical strength of the rock, and improve the volume crushing efficiency of the bottom hole rock, thereby greatly improving the crushing efficiency of the bottom hole rock. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The drawings constituting a part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0021] Figure 1 A schematic cross-sectional structure diagram of a pulse jet rotary drilling tool according to an optional embodiment of the present invention is shown;

[0022] Figure 2Shows Figure 1 A schematic cross-sectional structure diagram of a first joint assembly and an impeller assembly of a pulse jet rotary drilling tool;

[0023] Figure 3 Shows Figure 1 A schematic cross-sectional structure diagram of a housing assembly, a reset member and a bearing assembly of a pulse jet rotary drilling tool;

[0024] Figure 4 Shows Figure 1 Schematic diagram of the cross-sectional structure of the pulse jet rotary drilling tool at position A.

[0025] The above drawings include the following reference numerals:

[0026] 10. first joint assembly; 11. first flow channel; 12. diameter reducing section; 121. first step surface; 13. upper joint; 131. bell mouth; 132. inner shrinkage section; 133. accommodating cavity;

[0027] 20. Shell assembly; 21. Second flow channel; 211. First connecting section; 212. Second connecting section; 22. Middle joint; 23. Shell body;

[0028] 30. Pulse assembly; 31. Pressure transmission rod; 311. Overlap flange; 312. First sub-flow channel; 313. Liquid outlet; 32. Rotor hammer; 321. Rotor;

[0029] 40. impeller assembly; 41. impeller body; 411. impeller shaft; 412. blades; 42. guide body; 421. guide slope; 43. impeller seat;

[0030] 50, second joint assembly; 51, third flow channel; 511, third connecting section; 512, fourth connecting section; 52, hammer seat; 53, joint part; 531, anti-shaft drop; 5311, flow hole; 532, lower joint; 5321, clamping surface;

[0031] 60. Resetting member; 70. Bearing assembly; 80. Anti-drop joint; 81. Through hole; 82. Second step surface. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] In order to solve the problem of low drilling efficiency of the static load rock breaking method in the prior art, the present invention provides a pulse jet rotary percussion drilling tool.

[0034] like Figures 1 to 4 As shown, the pulse jet rotary percussion drilling tool includes a first joint assembly 10, a shell assembly 20, a pulse assembly 30, an impeller assembly 40 and a second joint assembly 50, wherein the first joint assembly 10 has a first flow channel 11; the shell assembly 20 is connected to the first joint assembly 10, and the shell assembly 20 has a second flow channel 21 connected to the first flow channel 11; at least a part of the pulse assembly 30 is movably arranged inside the second flow channel 21 and can move axially along the shell assembly 20 and rotate relative to the shell assembly 20; the impeller assembly 40 is arranged inside the first flow channel 11, so that the drilling fluid in the first flow channel 11 intermittently passes through the impeller assembly 40 and impacts the pulse assembly 30; at least a part of the second joint assembly 50 is arranged inside the second flow channel 21 and is located at one end of the pulse assembly 30 away from the first joint assembly 10, the second joint assembly 50 has a third flow channel 51 connected to the second flow channel 21, and the pulse assembly 30 can provide axial and circumferential forces for the second joint assembly 50.

[0035] The impeller assembly 40 in the present invention causes the drilling fluid in the first flow channel 11 to produce a periodically changing jet pressure, intermittently impacting the pulse assembly 30. The pulse assembly 30 can move along the axial direction of the shell assembly 20 and rotate relative to the shell assembly 20, so that the pulse assembly 30 intermittently rotates and impacts the second joint assembly 50, generating a spin load on the second joint assembly 50. The spin load is introduced into the bottom hole drill bit. The spin load generated on the drill bit is used to crush rocks, so that cracks or fissures on the rock surface continue to expand, reduce the mechanical strength of the rock, and improve the volume crushing efficiency of the bottom hole rock, thereby greatly improving the crushing efficiency of the bottom hole rock.

[0036] like Figure 1 and Figure 2 As shown, the first flow channel 11 has a reducing section 12 at one end close to the housing assembly 20, and the diameter of the first flow channel 11 decreases in the direction close to the housing assembly 20. In this way, the portion of the first flow channel 11 in the reducing section 12 can form an oscillation cavity, and the resonance of the oscillation cavity amplifies the amplitude of the pulsating pressure of the drilling fluid passing through the impeller assembly 40, thereby increasing the impact force of the impeller assembly 40 on the second joint assembly 50.

[0037] like Figure 2As shown, the inner side wall of the first flow channel 11 at one end close to the housing assembly 20 has a first step surface 121, so that the diameter of the first flow channel 11 decreases in the direction close to the housing assembly 20. In this way, the drilling fluid impacts the first step surface 121 in the first flow channel 11, so that the drilling fluid resonates in the oscillation cavity of the diameter-changing section 12.

[0038] Preferably, in this embodiment, the diameter-changing section 12 is divided into three sections whose diameters gradually decrease in a direction approaching the housing assembly 20 , and a first step surface 121 is provided between two adjacent sections.

[0039] like Figure 2 As shown, the impeller assembly 40 includes an impeller body 41, which is rotatably disposed inside the first flow channel 11, and the axial direction of the impeller body 41 is perpendicular to the length direction of the first flow channel 11. In this way, the drilling fluid impacts the impeller body 41, causing the impeller body 41 to rotate in the first flow channel 11.

[0040] It should be noted that, in the present embodiment, the impeller body 41 includes an impeller shaft 411 and a plurality of blades 412, and the plurality of blades 412 are arranged at intervals on the outer peripheral side of the impeller shaft 411. When the drilling fluid flows through the impeller body 41, the drilling fluid impacts the blades 412 to cause the blades 412 to rotate along the axis of the impeller shaft 411. The continuous rotation of the impeller body 41 causes the flow gap in the first flow channel 11 to change intermittently, so that the continuously flowing drilling fluid becomes an intermittently flowing drilling fluid, and generates a periodically fluctuating pulsating pressure.

[0041] It should be noted that, in this embodiment, different pulsating pressure frequencies and intensity amplitudes can be achieved by adjusting the design parameters of the impeller body 41, and different impact performances can be modulated to be suitable for formations of different lithologies.

[0042] like Figure 2 As shown, the impeller assembly 40 further includes a guide body 42 and an impeller seat 43. The guide body 42 is arranged on the side of the impeller body 41 away from the pulse assembly 30. The guide body 42 has a guide slope 421, so that the drilling fluid flowing through the guide slope 421 can impact the impeller body 41 along the tangential direction of the impeller body 41; the impeller seat 43 is connected to the first joint assembly 10, and the impeller body 41 is rotatably arranged on the impeller seat 43. In this way, the drilling fluid is guided into the impeller body 41 through the guide slope 421 of the guide body 42, so that the impeller assembly 40 rotates in the first flow channel 11.

[0043] It should be noted that in the present application, the first joint assembly 10 also includes an upper joint 13, which has a first flow channel 11 therein, and the upper joint 13 has a bell mouth 131, a retracted section 132 and a accommodating chamber 133 which are connected in sequence, the inner diameter of the bell mouth 131 away from the retracted section 132 is larger than the inner diameter of the bell mouth 131 close to the retracted section 132, so as to facilitate the drilling fluid to flow into the pulse jet rotary drilling tool through the bell mouth 131, the inner diameter of the bell mouth 131 is larger than the inner diameter of the retracted section 132, the inner diameter of the accommodating chamber 133 is larger than the inner diameter of the retracted section 132, so that a step surface is formed between the accommodating chamber 133 and the retracted section 132, the guide body 42, the impeller assembly 40 and the reducing section 12 are sequentially arranged in the accommodating chamber 133 of the upper joint 13 along the axial direction, and the axial limitation is realized by the threaded connection between the upper joint 13 and the shell assembly 20.

[0044] like Figure 1 and Figure 3 As shown, the pulse assembly 30 includes a pressure transmission rod 31 and a rotor hammer 32, wherein the pressure transmission rod 31 is movably arranged inside the second flow channel 21 and can move axially along the shell assembly 20; the rotor hammer 32 is connected to an end of the pressure transmission rod 31 away from the impeller assembly 40, and the circumferential side wall of the rotor hammer 32 has a plurality of rotors 321 spirally arranged along the length direction of the second flow channel 21. When the drilling fluid in the second flow channel 21 impacts the rotor 321, the rotor hammer 32 drives the pressure transmission rod 31 to rotate. In this way, the pressure transmission rod 31 generates an axial torque under the pulse pressure of the intermittently flowing drilling fluid, and drives the rotor hammer 32 to reciprocate along its axial direction. The rotor 321 of the rotor hammer 32 generates a circumferential torque under the impact of the high-speed flowing drilling fluid, and drives the pressure transmission rod 31 to rotate along its circumferential direction. The torque is generated by the interaction between the rotor 321 and the high-speed flowing drilling fluid at the bottom of the well, which ensures that the pulse assembly 30 periodically rotates to impact the second joint assembly 50, and the drilling fluid pressure loss is small.

[0045] Preferably, the pressure transmission rod 31 is connected to the rotor hammer 32 via threads.

[0046] like Figure 3As shown, the pulse jet rotary drilling tool also includes a reset member 60 and a bearing assembly 70. The reset member 60 is sleeved on the end of the pressure transmission rod 31 away from the rotor hammer 32. The two ends of the reset member 60 are respectively abutted against the bearing assembly 70 and the housing assembly 20. The end of the pressure transmission rod 31 away from the rotor hammer 32 has a lap flange 311, which abuts against the bearing assembly 70. The drilling fluid in the first flow channel 11 can impact the lap flange 311 after entering the second flow channel 21 to make the pressure transmission rod 31 move axially along the housing assembly 20. In this way, when the intermittently flowing drilling fluid flows from the first flow channel 11 to the second flow channel 21, the drilling fluid impacts the lap flange 311 in the second flow channel 21, and the reset member 60 is intermittently compressed and released, so that the pressure transmission rod 31 reciprocates along its axial direction in the second flow channel 21. The bearing assembly 70 is located between the lap flange 311 and the reset member 60, which can reduce the friction generated when the pressure transmission rod 31 and the rotor hammer 32 rotate circumferentially.

[0047] Preferably, in this embodiment, the reset member 60 is a spring, the pressure transmission rod 31 passes through the central hole of the spring, and the overlapping flange 311 is suspended on the bearing assembly 70 and the reset member 60, and can reciprocate along the axial direction under the action of the pulse pressure to periodically impact the pulse assembly 30. Preferably, the bearing assembly 70 is a rotary bearing.

[0048] like Figure 3 As shown, the housing assembly 20 includes an intermediate joint 22 and a housing body 23, wherein the reset member 60 abuts against the intermediate joint 22, and the end of the pressure transmission rod 31 away from the rotor hammer 32 is arranged inside the intermediate joint 22; the housing body 23 is connected to the first joint assembly 10 through the intermediate joint 22, and the end of the second joint assembly 50 away from the pulse assembly 30 extends out of the housing body 23. In this way, the pulse assembly 30 rotates in the housing body 23 to impact the second joint assembly 50, and the end of the second joint assembly 50 extending out of the housing body 23 is connected to the drill bit, which is used to transmit the rotary impact load received by the second joint assembly 50 to the drill bit, so as to increase the rock breaking and drilling speed of the drill bit.

[0049] Preferably, the upper joint 13 and the middle joint 22 are connected via threads, and the middle joint 22 and the shell body 23 are connected via threads.

[0050] like Figure 3As shown, the second flow channel 21 includes a first connecting section 211 and a second connecting section 212, the first connecting section 211 is connected to the first flow channel 11, the second connecting section 212 is connected to the third flow channel 51, at least a part of the pressure transmission rod 31 is arranged between the first connecting section 211 and the second connecting section 212 and separates the first connecting section 211 and the second connecting section 212, and the pressure transmission rod 31 has a first sub-flow channel 312 inside, and the two ends of the first sub-flow channel 312 are respectively connected to the first connecting section 211 and the second connecting section 212. In this way, the first sub-flow channel 312 inside the pressure transmission rod 31 connects the first connecting section 211 and the second connecting section 212, ensuring that the drilling fluid is smoothly transmitted to the drill bit through the pressure transmission rod 31, so as to ensure the normal operation of the drill bit.

[0051] like Figure 3 As shown, the circumferential side wall of the pressure transmission rod 31 close to the second connecting section 212 has a liquid outlet 313, and the first sub-channel 312 is connected to the second connecting section 212 through the liquid outlet 313. In this way, the liquid outlet 313 guides the first sub-channel 312 located in the pressure transmission rod 31 to the second connecting section 212 outside the pressure transmission rod 31 and inside the shell body 23, so that the rotor 321 located in the second connecting section 212 generates a circumferential torque under the action of the flowing drilling fluid, and rotates along the circumference of the rotor hammer 32.

[0052] like Figure 3 As shown, there is a rotation gap between the rotor 321 and the inner wall of the second flow channel 21. In this way, the rotor 321 can provide a certain guiding and straightening effect for the axial reciprocating motion of the rotor hammer 32, and the existence of the rotation gap can reduce the rotational friction between the rotor hammer 32 and the inner wall of the second flow channel 21, so as to ensure the reliability of the axial reciprocating motion and rotation of the rotor hammer 32.

[0053] like Figure 1 and Figure 4 As shown, the second joint assembly 50 includes a hammer seat 52 and a joint portion 53, wherein the pulse assembly 30 can provide axial and circumferential forces for the hammer seat 52; the joint portion 53 is connected to an end of the hammer seat 52 away from the pulse assembly 30, and the joint portion 53 has a third flow channel 51. In this way, the pulse assembly 30 moves along the axial direction of the shell assembly 20 and rotates relative to the shell assembly 20, so that the rotor hammer 32 of the pulse assembly 30 periodically rotates and impacts the hammer seat 52, so that the hammer seat 52 is subjected to the axial force and the circumferential force, and the axial load and the circumferential load are transmitted to the joint portion 53 and the bottom hole drill bit.

[0054] It should be noted that, in the present application, the reset member 60 , the bearing assembly 70 , the pressure transmission rod 31 , the rotor hammer 32 and the hammer seat 52 are all axially arranged inside the intermediate joint 22 and the shell body 23 .

[0055] like Figure 4As shown, the third flow channel 51 includes a third connecting section 511 and a fourth connecting section 512, the third connecting section 511 is connected to the second flow channel 21, the pulse jet rotary percussion drilling tool also includes an anti-drop joint 80, one end of the anti-drop joint 80 is located inside the housing assembly 20, the other end of the anti-drop joint 80 extends out of the housing assembly 20, and the part of the joint part 53 having the fourth connecting section 512 passes through the anti-drop joint 80. In this way, the end face of the anti-drop joint 80 located inside the housing assembly 20 and the end face of the joint part 53 close to the anti-drop joint 80 can be abutted and limited to prevent the joint part 53 from being separated from the pulse jet rotary percussion drilling tool.

[0056] Preferably, in the present application, the anti-drop joint 80 is connected to the shell body 23 via threads.

[0057] like Figure 4 As shown, the joint part 53 includes an anti-drop shaft 531 and a lower joint 532, wherein the anti-drop shaft 531 has a third connecting section 511 and is connected to the hammer seat 52; the lower joint 532 has a fourth connecting section 512 and is connected to the anti-drop shaft 531, and the anti-drop joint 80 has a through hole 81 for the lower joint 532 to pass through, the outer diameter of the anti-drop shaft 531 is greater than the inner diameter of the through hole 81, and the inner wall of the anti-drop joint 80 has a second step surface 82, and the lower joint 532 has a clamping surface 5321 that matches the second step surface 82. In this way, the outer diameter of the anti-drop shaft 531 is greater than the inner diameter of the through hole 81, which can form a step surface match, and when the hammer seat 52 is impacted by the rotor hammer 32 or the drill bit needs to pull out the bottom of the well rock, the lower joint 532 and the drill bit connected thereto are effectively prevented from falling to the bottom of the well. The second step surface 82 of the anti-drop joint 80 cooperates with the clamping surface 5321 of the lower joint 532 to prevent the drill bit from retracting into the interior of the pulse jet rotary drilling tool when the drill bit drills into the bottom rock, thereby affecting the crushing efficiency.

[0058] Preferably, in this embodiment, the peripheral side wall of the anti-drop shaft 531 has a circulation hole 5311 , and the second flow channel 21 is connected to the third connecting section 511 through the circulation hole 5311 .

[0059] It should be noted that, in the present embodiment, the anti-drop shaft 531 and the lower joint 532 are arranged inside the anti-drop joint 80 and the shell body 23 .

[0060] The working process of the pulse jet rotary drilling tool is roughly as follows:

[0061] During actual use of the tool of the present invention, the lower joint 532 is directly connected to the bottom hole drill bit. After the drilling fluid enters the tool body from one end of the bell mouth 131 of the upper joint 13, the blades 412 are driven to rotate around the axis of the impeller shaft 411, causing the gap between the impeller body 41 and the impeller seat 43 to change periodically, so that the continuously flowing drilling fluid generates periodic pulsating pressure, and generates resonance in the variable diameter section 12, amplifying the amplitude of the pulsating pressure. The pulsating pressure acts on the threaded pressure transmission rod 31 and the rotor hammer 32, causing the reset member 60 to be compressed and deformed periodically, driving the rotor hammer 32 to reciprocate periodically along its axial direction, thereby realizing a periodic high-speed impact on the hammer seat 52. In addition, driven by the high-speed flowing drilling fluid, the interaction between the rotor 321 on the rotor hammer 32 and the drilling fluid can generate a torque along its axial direction, so that the rotor hammer 32 rotates circumferentially around its own axis. Under the combined effect of high-speed impact and circumferential torque, the rotor hammer 32 can generate a rotational impact on the hammer seat 52, and the rotational impact can be further transmitted to the drill bit through the anti-drop shaft 531 and the lower joint 532, forming a rotational impact rock breaking effect on the bottom of the well, which can improve the volume crushing efficiency of the rock, thereby improving the mechanical drilling speed. The tool of the present invention uses an impeller-type pulse short section to generate pulsating pressure, and can achieve different pulsating pressure frequencies and intensity amplitudes by adjusting the parameters of the impeller assembly 40, modulating different impact performances, and thus being suitable for formations of different rock types; the method of using the rotor 321 of the rotor hammer 32 to output torque consumes little drilling fluid energy and has a large output torque. Therefore, the tool of the present invention has the characteristics of adjustable output parameters and wide formation applicability.

[0062] From the above description, it can be seen that the above-mentioned embodiments of the present invention achieve the following technical effects: the impeller assembly 40 in the present invention causes the drilling fluid in the first flow channel 11 to produce a periodically changing jet pressure, intermittently impacting the pulse assembly 30, and the pulse assembly 30 can move along the axial direction of the shell assembly 20 and rotate relative to the shell assembly 20, so that the pulse assembly 30 intermittently rotates and impacts the second joint assembly 50, generating a spin load on the second joint assembly 50, and the spin load is introduced into the bottom hole drill bit. The spin load generated on the drill bit is used to crush the rock, so that the cracks or fissures on the rock surface continue to expand, reduce the mechanical strength of the rock, and improve the volume crushing efficiency of the bottom hole rock, thereby greatly improving the crushing efficiency of the bottom hole rock.

[0063] The present invention combines the pulse jet technology with the downhole rotary impact drilling technology, and adopts the impeller assembly 40 to generate a periodically changing drilling fluid jet pressure. The periodically changing pressure acts on the reset member 60 to compress and release it periodically, so that the rotor hammer 32 impacts the hammer seat 52. A rotor 321 is designed on the rotor hammer 32, which forms a rotational motion under the action of the high-speed flowing drilling fluid, thereby achieving the purpose of applying a rotary impact load on the hammer seat 52. Further, by introducing the rotary impact load into the bottom hole drill bit, a rotary impact load is generated on the drill bit for crushing rocks, which greatly improves the crushing efficiency of the bottom hole rocks.

[0064] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0065] Unless otherwise specifically stated, the relative arrangement of the parts and steps described in these embodiments, numerical expressions and numerical values ​​do not limit the scope of the present invention. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, method and equipment known to ordinary technicians in the relevant field may not be discussed in detail, but in appropriate cases, the technology, method and equipment should be regarded as a part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0066] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" may include both "above" and "below". The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0067] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0068] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein.

[0069] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A pulse jet rotary drilling tool, characterized in that: include: A first joint assembly (10), the first joint assembly (10) having a first flow channel (11); A housing assembly (20), the housing assembly (20) being connected to the first joint assembly (10), the housing assembly (20) having a second flow channel (21) communicating with the first flow channel (11); a pulse assembly (30), at least a portion of which is movably disposed inside the second flow channel (21) and is capable of moving along the axial direction of the housing assembly (20) and / or rotating relative to the housing assembly (20); an impeller assembly (40), the impeller assembly (40) being arranged inside the first flow channel (11) so that the drilling fluid in the first flow channel (11) intermittently passes through the impeller assembly (40) and impacts the pulse assembly (30); A second joint assembly (50), at least a portion of which is disposed inside the second flow channel (21) and located at an end of the pulse assembly (30) away from the first joint assembly (10), the second joint assembly (50) having a third flow channel (51) connected to the second flow channel (21), and the pulse assembly (30) being capable of providing an axial and / or circumferential force to the second joint assembly (50).

2. The pulse jet rotary drilling tool according to claim 1, characterized in that: The first flow channel (11) has a diameter-reducing section (12) at one end close to the shell component (20), and the diameter of the first flow channel (11) decreases in a direction close to the shell component (20).

3. The pulse jet rotary drilling tool according to claim 2, characterized in that: An inner side wall of one end of the first flow channel (11) close to the housing assembly (20) has a first step surface (121) so that the diameter of the first flow channel (11) decreases in a direction close to the housing assembly (20).

4. The pulse jet rotary drilling tool according to claim 1, characterized in that: The impeller assembly (40) comprises: An impeller body (41), wherein the impeller body (41) is rotatably disposed inside the first flow channel (11), and the axial direction of the impeller body (41) is perpendicular to the length direction of the first flow channel (11).

5. The pulse jet rotary drilling tool according to claim 4, characterized in that: The impeller assembly (40) further comprises: a guide body (42), the guide body (42) being arranged on a side of the impeller body (41) away from the pulse assembly (30), the guide body (42) having a guide slope (421), so that the drilling fluid flowing through the guide slope (421) can impact the impeller body (41) along a tangential direction of the impeller body (41); and / or An impeller seat (43), the impeller seat (43) is connected to the first joint assembly (10), and the impeller body (41) is rotatably arranged on the impeller seat (43).

6. The pulse jet rotary drilling tool according to claim 1, characterized in that: The pulse assembly (30) comprises: a pressure transmission rod (31), the pressure transmission rod (31) being movably disposed inside the second flow channel (21) and being capable of moving along the axial direction of the housing assembly (20); A rotor hammer (32), the rotor hammer (32) being connected to an end of the pressure transmission rod (31) away from the impeller assembly (40), and the circumferential side wall of the rotor hammer (32) having a plurality of rotors (321) spirally arranged along the length direction of the second flow channel (21), and when the drilling fluid in the second flow channel (21) impacts the rotors (321), the rotor hammer (32) drives the pressure transmission rod (31) to rotate.

7. The pulse jet rotary drilling tool according to claim 6, characterized in that: The pulse jet rotary drilling tool also includes a reset member (60) and a bearing assembly (70). The reset member (60) is sleeved on the end of the pressure transmission rod (31) away from the rotor hammer (32). The two ends of the reset member (60) are respectively abutted against the bearing assembly (70) and the housing assembly (20). The end of the pressure transmission rod (31) away from the rotor hammer (32) has a lap flange (311), and the lap flange (311) is abutted against the bearing assembly (70). After the drilling fluid in the first flow channel (11) enters the second flow channel (21), it can impact the lap flange (311) so that the pressure transmission rod (31) moves axially along the housing assembly (20).

8. The pulse jet rotary drilling tool according to claim 7, characterized in that: The housing assembly (20) comprises: An intermediate joint (22), the reset member (60) abutting against the intermediate joint (22), and an end of the pressure transmission rod (31) away from the rotor hammer (32) is arranged inside the intermediate joint (22); A shell body (23), wherein the shell body (23) is connected to the first joint assembly (10) via the intermediate joint (22), and an end of the second joint assembly (50) away from the pulse assembly (30) extends out of the shell body (23).

9. The pulse jet rotary drilling tool according to claim 6, characterized in that: The second flow channel (21) comprises a first connecting section (211) and a second connecting section (212); the first connecting section (211) is connected to the first flow channel (11); the second connecting section (212) is connected to the third flow channel (51); at least a portion of the pressure transmission rod (31) is arranged between the first connecting section (211) and the second connecting section (212) and separates the first connecting section (211) and the second connecting section (212); the pressure transmission rod (31) has a first sub-flow channel (312) inside, and two ends of the first sub-flow channel (312) are respectively connected to the first connecting section (211) and the second connecting section (212).

10. The pulse jet rotary drilling tool according to claim 9, characterized in that: The pressure transmission rod (31) has a liquid outlet hole (313) on the circumferential side wall close to the second connecting section (212), and the first sub-channel (312) is connected to the second connecting section (212) through the liquid outlet hole (313).

11. The pulse jet rotary drilling tool according to claim 6, characterized in that: A rotation gap is provided between the rotor (321) and the inner wall of the second flow channel (21).

12. The pulse jet rotary drilling tool according to any one of claims 1 to 11, characterized in that: The second joint assembly (50) comprises: A hammer seat (52), wherein the pulse assembly (30) is capable of providing an axial and / or circumferential force to the hammer seat (52); A joint portion (53), the joint portion (53) is connected to an end of the hammer seat (52) away from the pulse assembly (30), and the joint portion (53) has the third flow channel (51).

13. The pulse jet rotary drilling tool according to claim 12, characterized in that: The third flow channel (51) includes a third connecting section (511) and a fourth connecting section (512), the third connecting section (511) is connected to the second flow channel (21), the pulse jet rotary drilling tool also includes an anti-drop joint (80), one end of the anti-drop joint (80) is located inside the shell assembly (20), and the other end of the anti-drop joint (80) extends out of the shell assembly (20), and the part of the joint part (53) having the fourth connecting section (512) passes through the anti-drop joint (80).

14. The pulse jet rotary drilling tool according to claim 13, characterized in that: The joint part (53) comprises: An anti-drop shaft (531), the anti-drop shaft (531) having the third connecting section (511) and connected to the hammer seat (52); The lower joint (532) has the fourth connecting section (512) and is connected to the anti-drop shaft (531), the anti-drop joint (80) has a through hole (81) for the lower joint (532) to pass through, the outer diameter of the anti-drop shaft (531) is larger than the inner diameter of the through hole (81), and the inner wall of the anti-drop joint (80) has a second step surface (82), and the lower joint (532) has a snap-fit ​​surface (5321) that cooperates with the second step surface (82).

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