Hydraulic pulse vibration integrated tool based on rotor drive

Abstract

The present invention discloses a hydraulic pulse vibration integrated tool based on rotor drive, comprising: a housing; a vibration actuator, a pulse generating mechanism, an upper transmission mechanism, a rotor driving mechanism and a lower transmission mechanism connected in sequence. When in use, the rotor driving mechanism is started, and the power is transmitted downward to the lower transmission mechanism, and the lower transmission mechanism transmits the power to the drill bit to break the rock. At the same time, the rotor driving mechanism transmits the power upward to the upper transmission mechanism, and the upper transmission mechanism transmits the power to the pulse generating mechanism. The pulse generating mechanism converts the rotation transmitted by the upper transmission mechanism into axial reciprocating movement to realize the axial reciprocating movement of the driving vibration actuator, and the vibration actuator is connected to the drill string, thereby realizing the pulse vibration of the entire hydraulic pulse vibration integrated tool, improving the rock breaking ability of the drill bit, and at the same time reducing the friction and support pressure between the hydraulic pulse vibration integrated tool and the drill string and the well wall, and improving the drilling pressure transmission efficiency.

Description

Technical Field

[0001] The invention relates to the technical fields of oil and gas exploration, geological exploration and geothermal well development, and in particular to a hydraulic pulse vibration integrated tool based on rotor drive. Background Art

[0002] With the continuous expansion of the exploration and development of unconventional oil and gas resources such as shale gas and shale oil, the proportion of horizontal wells and large displacement and deviated wells is increasing. During the drilling and construction of horizontal wells and large displacement and deviated wells, the pressure and friction between the drill string and the well wall are common, which often leads to low drilling efficiency and difficulty in controlling the wellbore trajectory.

[0003] The hydraulic vibrator relies on the change in the flow area between the dynamic and static disc valves in the internal pulse generating mechanism to generate periodic pressure pulses, thereby driving the entire tool to generate high-frequency vibrations, which can effectively reduce the support pressure and friction. However, it needs to be used in conjunction with the screw drill during the drilling process, which makes the circulating pressure loss of the entire drill string high. In addition, the hydraulic vibrator is connected in the middle of the drill string at a certain distance from the drill bit. Its vibration effect cannot directly act on the drill bit to break the rock, so that the rock breaking energy of the drill bit is not effectively improved.

[0004] Therefore, how to reduce the friction and support pressure between the drill string and the well wall and improve the rock breaking energy of the drill bit is a technical problem that needs to be solved urgently by those skilled in the art. Summary of the invention

[0005] In view of this, the purpose of the present invention is to provide a hydraulic pulse vibration integrated tool based on rotor drive, which can reduce the friction and support pressure between the drill string and the well wall and improve the rock breaking energy of the drill bit.

[0006] In order to achieve the above object, the present invention provides the following scheme:

[0007] A hydraulic pulse vibration integrated tool based on rotor drive, comprising:

[0008] case;

[0009] A vibration actuator, a pulse generating mechanism, an upper transmission mechanism, a rotor driving mechanism and a lower transmission mechanism connected in sequence end to end, wherein the vibration actuator, the pulse generating mechanism, the upper transmission mechanism, the rotor driving mechanism and the lower transmission mechanism are all installed in the housing, the lower transmission mechanism is used to connect with the drill bit, and the top end of the vibration actuator is used to connect with the drill string;

[0010] The pulse generating mechanism can convert the rotation transmitted by the upper transmission mechanism into axial reciprocating movement, so as to realize the axial reciprocating movement of the vibration actuator.

[0011] In a specific embodiment, the pulse generating mechanism includes a first joint, a second joint, a core shaft, a cam and a first elastic reset member;

[0012] The first joint and the second joint are both connected to the housing, and the first joint is located at the bottom end of the vibration actuator, the top end of the second joint is connected to the bottom end of the first joint, the first joint is provided with a tapered through hole communicated with the inner cavity of the vibration actuator, and the diameter of the tapered through hole gradually increases in a direction away from the vibration actuator;

[0013] The first elastic reset member is used for resetting the mandrel, the top end of the cam supports the bottom end of the mandrel, the top surface of the cam is a wave surface, and the cam is transmission-connected to the driving end of the upper transmission mechanism;

[0014] The mandrel is slidably mounted in the second joint along the axial direction of the mandrel, and the top end of the mandrel can extend into the tapered through hole;

[0015] A first radial flow hole conductively connected to the top of the inner cavity of the core shaft is provided on the side wall of the core shaft, the first radial flow hole is conductively connected to the inner cavity of the second joint, and the inner cavity of the second joint is conductively connected to the bottom end of the conical through hole.

[0016] In another specific embodiment, a boss is provided on the mandrel;

[0017] The outer wall of the boss is slidably connected to the inner wall of the shell;

[0018] The first elastic reset member is sheathed around the core shaft, and the top end of the first elastic reset member abuts against the bottom end of the second joint, and the bottom end of the first elastic reset member abuts against the top end of the boss.

[0019] In another specific embodiment, the pulse generating mechanism further comprises a roller, a roller groove for accommodating the roller is formed at the bottom end of the boss, and the bottom end of the roller rolls along the top surface of the cam;

[0020] or

[0021] The bottom surface of the boss is a wave surface, and the bottom surface of the boss contacts the top surface of the cam;

[0022] and / or

[0023] A tapered portion is disposed at the top end of the mandrel, and a diameter of the tapered portion gradually increases along a direction from the top end of the mandrel to the bottom end of the mandrel.

[0024] In another specific embodiment, the upper transmission mechanism includes an upper universal shaft, an upper water cap, an anti-drop sleeve and an anti-drop rod;

[0025] The upper cardan shaft and the upper water cap are placed in the housing;

[0026] The top end of the upper water cap is connected to the cam, the bottom end of the upper water cap is connected to the top end of the upper universal shaft, a second radial flow hole communicating with the inner cavity of the upper water cap is opened on the side wall of the upper water cap, the inner cavity of the upper water cap is communicated with the inner cavity of the core shaft, and the second radial flow hole is also communicated with the inner cavity of the rotor drive mechanism;

[0027] The bottom end of the upper cardan shaft is connected to the anti-drop rod, the anti-drop rod is connected to the driving end of the rotor driving mechanism, the anti-drop sleeve covers the anti-drop rod, and the anti-drop sleeve is connected to the shell, and the diameter of the through hole opened on the anti-drop sleeve is larger than the diameter of the anti-drop rod and smaller than the diameter of the upper cardan shaft.

[0028] In another specific embodiment, the lower transmission mechanism includes a lower universal shaft, a lower water cap and a lower transmission shaft;

[0029] The top end of the lower universal shaft is connected to the driving end of the rotor driving mechanism, the bottom end of the lower universal shaft is connected to the top end of the water cap, and the bottom end of the water cap is connected to the top end of the lower transmission shaft;

[0030] A third radial flow hole communicating with the inner cavity of the water drop cap is provided on the side wall of the water drop cap, and the third radial flow hole is also communicating with the inner cavity of the rotor drive mechanism;

[0031] The lower transmission shaft is rotatably connected to the housing, and the bottom end of the lower transmission shaft is connected to the drill bit.

[0032] In another specific embodiment, the lower transmission mechanism further comprises an upper TC bearing, a lower TC bearing, a string bearing, a lock nut and a spacer;

[0033] The upper TC bearing and the lower TC bearing are respectively installed on the inner wall of the shell to support the two ends of the lower transmission shaft. The string bearing is installed between the upper TC bearing and the lower TC bearing through the lock nut and the spacer sleeve to support the lower transmission shaft.

[0034] In another specific embodiment, the rotor drive mechanism includes a rotor and a stator;

[0035] The stator is mounted on the inner wall of the housing, the rotor is rotatably connected to the stator, the top end of the rotor is connected to the anti-drop rod, and the bottom end of the rotor is connected to the lower universal shaft.

[0036] In another specific embodiment, the vibration actuator includes an upper transmission shaft, a second elastic return member and a piston;

[0037] The piston is connected to the bottom end of the upper transmission shaft, an abutment protrusion is provided on the inner wall of the shell, the top end of the second elastic reset member abuts against the top end of the piston, and the top end of the second elastic reset member abuts against the abutment protrusion.

[0038] In another specific embodiment, the first elastic return member is a spring;

[0039] and / or

[0040] The second elastic reset member is a disc spring;

[0041] and / or

[0042] The upper transmission shaft is provided with a first polygonal transmission part, and the inner hole of the abutting protrusion is a first polygonal through hole that matches with the first polygonal transmission part;

[0043] and / or

[0044] The core shaft is provided with a second polygonal transmission part, and the inner hole of the second joint is a second polygonal through hole that fits with the second polygonal transmission part;

[0045] and / or

[0046] The housing comprises an upper transmission shaft housing, an upper cardan shaft housing, a stator housing, a lower cardan shaft housing and a lower transmission shaft housing.

[0047] The upper transmission shaft is installed at the top of the upper transmission shaft housing, and the upper transmission shaft housing, the first joint, the second joint, the upper cardan shaft housing, the stator housing, the lower cardan shaft housing and the lower transmission shaft housing are connected end to end in sequence.

[0048] The vibration actuator is installed in the upper transmission shaft housing.

[0049] The pulse generating mechanism and the upper transmission mechanism are installed in the upper cardan shaft housing.

[0050] The rotor drive mechanism is installed in the stator housing;

[0051] The lower transmission mechanism is installed in the lower cardan shaft housing and the lower transmission shaft housing.

[0052] The various embodiments according to the present invention can be arbitrarily combined as needed, and the embodiments obtained after these combinations are also within the scope of the present invention and are part of the specific implementation methods of the present invention.

[0053] Without being limited to any theory, it can be seen from the above disclosure that the rotor-driven hydraulic pulse vibration integrated tool disclosed by the present invention, when in use, the rotor driving mechanism is started, and the power is transmitted downward to the lower transmission mechanism, and the lower transmission mechanism transmits the power to the drill bit to break the rock. At the same time, the rotor driving mechanism transmits the power upward to the upper transmission mechanism, and the upper transmission mechanism transmits the power to the pulse generating mechanism, and the pulse generating mechanism converts the rotation transmitted by the upper transmission mechanism into axial reciprocating movement to realize the axial reciprocating movement of the driving vibration actuator, and the vibration actuator is connected to the drill string, thereby realizing the pulse vibration of the entire hydraulic pulse vibration integrated tool, improving the rock breaking ability of the drill bit, and at the same time reducing the friction and support pressure between the hydraulic pulse vibration integrated tool and the drill string and the well wall, and improving the transmission efficiency of the drilling pressure. BRIEF DESCRIPTION OF THE DRAWINGS

[0054] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0055] Figure 1 A schematic cross-sectional view of the rotor-driven hydraulic pulse vibration integrated tool provided by the present invention;

[0056] Figure 2 for Figure 1 A schematic diagram of the enlarged structure of part I;

[0057] Figure 3 for Figure 1 A schematic diagram of the enlarged structure of part II;

[0058] Figure 4 It is a structural schematic diagram of I of the integrated hydraulic pulse vibration tool based on rotor drive provided by the present invention in a state where the flow area is minimum;

[0059] Figure 5 A schematic diagram of the structure of the upper transmission shaft housing provided by the present invention when the hole at the upper transmission shaft is a regular octagon;

[0060] Figure 6 A schematic diagram of the structure of the upper transmission shaft housing provided by the present invention when the hole at the upper transmission shaft is a regular hexagon;

[0061] Figure 7 A schematic diagram of the structure when the hole at the limiting core shaft of the second joint provided by the present invention is a regular hexagon;

[0062] Figure 8A schematic diagram of the structure when the hole at the limiting core shaft of the second joint provided by the present invention is a regular octagon;

[0063] Fig. 9 A schematic cross-sectional structural diagram of a second joint provided by the present invention;

[0064] Fig.10 A schematic diagram of a cross-sectional structure of a mandrel provided by the present invention;

[0065] Fig.11 A schematic diagram of a cam cross-sectional structure provided by the present invention;

[0066] Fig.12 Another cross-sectional structural schematic diagram of the core shaft provided by the present invention.

[0067] in, Figure 1-12 middle:

[0068] Upper transmission shaft 1, upper transmission shaft housing 2, abutment protrusion 201, second elastic reset member 3, piston 4, first joint 5, second joint 6, upper cardan shaft 13, upper cardan shaft housing 7, spindle 8, boss 801, first elastic reset member 9, roller 10, cam 11, upper water cap 12, anti-drop sleeve 14, anti-drop rod 15, stator 16, rotor 17, stator housing 18, lower cardan shaft 19, lower cardan shaft housing 20, lower water Cap 21, upper TC bearing moving ring 22, upper TC bearing stationary ring 23, string bearing 24, lower transmission shaft 30, lower transmission shaft housing 25, lock nut 26, spacer 27, lower TC bearing stationary ring 28, lower TC bearing moving ring 29, transmission surface 31, square surface 32, tapered through hole 33, first radial flow hole 34, roller groove 35, upper wave surface 36, lower wave surface 37, second radial flow hole 38, third radial flow hole 39. DETAILED DESCRIPTION

[0069] The following will be combined with the attached embodiment of the present invention Figure 1-12 , clearly and completely describe the technical solutions in the embodiments of the present invention. The present invention can be implemented in many different forms and is not limited to the implementation methods described in this embodiment. The purpose of providing the following specific implementation methods is to facilitate a clearer and more thorough understanding of the disclosure of the present invention, wherein the words indicating directions such as below refer only to the position of the structure shown in the corresponding drawings.

[0070] It is understood that the terms used herein are only for describing specific embodiments and are not intended to limit the present invention. When used herein, the singular forms "a" and "" are also intended to include the plural forms unless the context clearly states otherwise. Further, when used in this specification, the terms "include" and / or "comprise" indicate the presence of features, wholes, steps, elements and / or components, but do not exclude the presence or increase of one or more other features, wholes, steps, elements, components and / or combinations thereof. The subsequent description of the specification is a preferred embodiment of the present invention, but the description is for the purpose of illustrating the general principles of the present invention and is not intended to limit the scope of the present invention. The scope of protection of the present invention shall be determined by the appended claims.

[0071] like Figure 1-4 As shown, the present invention discloses a hydraulic pulse vibration integrated tool based on rotor drive, wherein the hydraulic pulse vibration integrated tool includes a housing, a vibration actuator, a pulse generating mechanism, an upper transmission mechanism, a rotor driving mechanism and a lower transmission mechanism. The vibration actuator, the pulse generating mechanism, the upper transmission mechanism, the rotor driving mechanism and the lower transmission mechanism are sequentially connected end to end and are all installed in the housing. Specifically, the housing can be divided into multiple sections that can be detachably connected to facilitate the installation of various mechanisms, and each section of the housing can be set as needed.

[0072] The two ends of the rotor driving mechanism are respectively connected to the upper transmission mechanism and the lower transmission mechanism, and the lower transmission mechanism is used to be connected to the drill bit.

[0073] The two ends of the pulse generating mechanism are respectively connected to the upper transmission mechanism and the vibration actuator, and the pulse generating mechanism can convert the rotation transmitted by the upper transmission mechanism into axial reciprocating movement to realize the axial reciprocating movement of the vibration actuator. The top end of the vibration actuator is used to connect with the drill string.

[0074] It should be noted that the upper transmission mechanism and the lower transmission mechanism can be any mechanism capable of realizing power transmission. The pulse generating mechanism can be any mechanism capable of realizing conversion of rotation into axial reciprocating motion.

[0075] In this article, the axial direction refers to the axis direction of the hydraulic pulse vibration integrated tool.

[0076] The hydraulic pulse vibration integrated tool based on rotor drive disclosed by the present invention, when in use, the rotor driving mechanism is started, and the power is transmitted downward to the lower transmission mechanism, and the lower transmission mechanism transmits the power to the drill bit to break the rock. At the same time, the rotor driving mechanism transmits the power upward to the upper transmission mechanism, and the upper transmission mechanism transmits the power to the pulse generating mechanism, and the pulse generating mechanism converts the rotation transmitted by the upper transmission mechanism into axial reciprocating movement, so as to realize the axial reciprocating movement of the driving vibration actuator, and the vibration actuator is connected to the drill string, thereby realizing the pulse vibration of the entire hydraulic pulse vibration integrated tool, improving the rock breaking ability of the drill bit, and at the same time reducing the friction and support pressure between the hydraulic pulse vibration integrated tool and the drill string and the well wall, and improving the transmission efficiency of the drilling pressure.

[0077] In some of the embodiments, the pulse generating mechanism includes a first joint 5 , a second joint 6 , an upper cardan shaft housing 7 , a core shaft 8 , a cam 11 and a first elastic reset member 9 .

[0078] Further, the present invention discloses that the housing includes an upper transmission shaft housing 2, an upper cardan shaft housing 7, a stator housing 18, a lower cardan shaft housing 20 and a lower transmission shaft housing 25. The upper transmission shaft 1 is installed at the top of the upper transmission shaft housing 2, the upper transmission shaft housing 2, the first joint 5, the second joint 6, the upper cardan shaft housing 7, the stator housing 18, the lower cardan shaft housing 20 and the lower transmission shaft housing 25 are connected end to end in sequence, the vibration actuator is installed in the upper transmission shaft housing 2, the pulse generating mechanism and the upper transmission mechanism are installed in the upper cardan shaft housing 7, the rotor driving mechanism is installed in the stator housing 18, and the lower transmission mechanism is installed in the lower cardan shaft housing 20 and the lower transmission shaft housing 25.

[0079] The top end of the first joint 5 is sealedly connected to the bottom end of the upper transmission shaft housing 2, and the first joint 5 is provided with a tapered through hole 33 which is in communication with the inner cavity of the vibration actuator, and the diameter of the tapered through hole 33 gradually increases in the direction away from the vibration actuator.

[0080] The top of the second joint 6 is connected to the bottom of the first joint 5, the top of the upper cardan shaft housing 7 is connected to the bottom of the second joint 6, and the bottom of the upper cardan shaft housing 7 is connected to the top of the stator housing 18. Specifically, the second joint 6 is sealed to the first joint 5.

[0081] The core shaft 8, cam 11 and first elastic reset member 9 are all placed in the upper cardan shaft housing 7. The first elastic reset member 9 is used for resetting the core shaft 8. The first elastic reset member 9 can be any device that can achieve the reset of the core shaft 8, for example, a spring or disc spring in a compressed state, or other reset members.

[0082] The top end of the cam 11 supports the bottom end of the mandrel 8, and the top surface of the cam 11 is a wave surface. Fig.11The cam 11 is in transmission connection with the driving end of the upper transmission mechanism, and when the cam 11 rotates, the wavy surface 36 on the cam 11 contacts the mandrel 8 at different positions, thereby achieving the lifting and reciprocating motion of the mandrel 8.

[0083] Along the axial direction of the core shaft 8, the core shaft 8 can be slidably installed in the second joint 6, and the top end of the core shaft 8 can extend into the tapered through hole 33. A second polygonal transmission part is provided on the core shaft 8, and the inner hole of the second joint 6 is a second polygonal through hole that matches the second polygonal transmission part to prevent the core shaft 8 from rotating, so that the core shaft 8 can only move along the axial direction of the hydraulic pulse vibration integrated tool, and the power transmission is realized through the square surface 32 of the core shaft 8. It should be noted that a slide groove can be provided on one of the core shaft 8 and the through hole of the second joint 6, and a slide rail that slides with the slide groove can be provided on the other to achieve that the upper transmission shaft 1 cannot rotate and can only move axially. Figure 7 As shown, the core shaft 8 is a regular hexagonal structure, and correspondingly, the through hole of the second core shaft 8 is a regular hexagonal through hole. Figure 8 As shown, the core shaft 8 is a regular octagonal structure, and correspondingly, the through hole of the second core shaft 8 is a regular octagonal through hole.

[0084] A first radial flow hole 34 is provided on the side wall of the mandrel 8 and is connected to the top of the inner cavity of the mandrel 8. The first radial flow hole 34 is connected to the inner cavity of the second joint 6, and the inner cavity of the second joint 6 is connected to the bottom end of the tapered through hole 33. In order to facilitate the outflow of drilling fluid, the first radial flow hole 34 is inclined, and the outlet of the first radial flow hole 34 is inclined toward the direction close to the tapered through hole 33.

[0085] As the core shaft 8 rises and falls, the area of ​​the tapered through hole 33 blocked by the core shaft 8 also changes accordingly: when the core shaft 8 rises, the top end of the core shaft 8 is inserted into the tapered through hole 33, causing the flow area of ​​the drilling fluid to decrease when flowing through the tapered through hole 33, so that the drilling fluid pressure in the upper vibration actuator increases, thereby pushing the moving end of the vibration actuator to move upward; in the process of the roller 10 moving from the top end to the bottom end of the upper wave surface 36, the core shaft 8 moves downward under the preload of the first elastic reset member 9 and causes the top end of the core shaft 8 to exit the tapered through hole 33. Outside the through hole 33, the flow area of ​​the drilling fluid increases when it flows through the tapered through hole 33, which reduces the drilling fluid pressure in the upper vibration actuator, thereby retracting the moving end of the upper vibration actuator. The moving end of the upper vibration actuator periodically extends and retracts, which will cause the entire hydraulic pulse vibration integrated tool to generate pulse vibration driven by the drilling fluid pressure, thereby increasing the rock breaking energy of the drill bit, while reducing the friction and support pressure between the hydraulic pulse vibration integrated tool and the upper drill string and the well wall, thereby improving the transmission efficiency of the drilling pressure.

[0086] Further, the present invention discloses that a boss 801 is provided on the mandrel 8, and the outer wall of the boss 801 is slidably connected to the inner wall of the upper cardan shaft housing 7. Specifically, the boss 801 is an annular boss, which is convenient for sliding along the mandrel 8. The boss 801 can also be a structure such as an arc block that slides with the inner wall of the mandrel 8.

[0087] The first elastic reset member 9 is outer sleeved with the core shaft 8, and the top end of the first elastic reset member 9 abuts against the bottom end of the second joint 6, and the bottom end of the first elastic reset member 9 abuts against the top end of the boss 801, so that when the roller 10 moves from the top end to the bottom end of the upper wave surface 36, the core shaft 8 moves downward under the action of the preload force of the first elastic reset member 9.

[0088] Furthermore, the present invention discloses that the pulse generating mechanism further includes a roller 10, and a roller groove 35 for accommodating the roller 10 is formed at the bottom end of the boss 801. Fig.10 As shown, the bottom end of the roller 10 rolls along the top surface of the cam 11. Specifically, the roller groove 35 and the roller 10 correspond one to one. In order to achieve stable support for the core shaft 8, the number of roller grooves 35 is at least 2, and the roller grooves 35 are evenly distributed at the bottom end of the boss 801 along the axis of the boss 801. In this embodiment, the number of roller grooves 35 is taken as an example. Correspondingly, the number of rollers 10 is also 3, and the wave surface is divided into 3 sections along the circumference of the cam 11, each section is smooth from the crest to the trough, and the 3 sections are smoothly connected.

[0089] Specifically, a through hole is opened in the center of the cam 11, and the bottom end of the core shaft 8 extends into the through hole opened in the cam 11. The through hole on the cam 11 provides a guide for the core shaft 8.

[0090] It should be noted that the structure capable of converting rotation into linear reciprocating motion may also be other structures, such as Fig.12 As shown, the bottom surface of the boss 801 is a wave surface, and the bottom surface of the boss 801 contacts the top surface of the cam 11. The wave surface on the boss 801 contacts the wave surface on the upper end of the cam 11, and the core shaft 8 is driven to reciprocate in and out of the tapered through hole 33 by the speed difference between the two wave surfaces, generating a drilling fluid pressure pulse effect. For ease of description, the wave surface on the boss 801 is the upper wave surface 36, and the wave surface on the cam 11 is the lower wave surface 37.

[0091] Furthermore, the present invention discloses that a tapered portion is provided at the top end of the core shaft 8 , and the diameter of the tapered portion gradually increases along the direction from the top end of the core shaft 8 to the bottom end of the core shaft 8 , so as to facilitate the guiding of the core shaft 8 .

[0092] In some other embodiments, the vibration actuator includes an upper transmission shaft 1 , a second elastic reset member 3 and a piston 4 .

[0093] The upper transmission shaft housing 2 is connected to the first joint 5, specifically, the upper transmission shaft housing 2 is threadedly connected to the first joint 5, so that the two can be disassembled and replaced. The piston 4 is connected to the bottom end of the upper transmission shaft 1, specifically, the piston 4 is threadedly connected to the bottom end of the upper transmission shaft 1, so that the two can be disassembled and replaced. The piston 4 is slidably connected to the inner wall of the upper transmission shaft housing 2 in a sealed manner.

[0094] An abutting protrusion 201 is provided on the inner wall of the upper transmission shaft housing 2, and the top end of the second elastic reset member 3 abuts against the top end of the piston 4, and the top end of the second elastic reset member 3 abuts against the abutting protrusion 201. Specifically, the second elastic reset member 3 is a disc spring. It should be noted that the second elastic reset member 3 is not limited to a disc spring, and can also be other reset members such as a spring. This embodiment takes the second elastic reset member 3 as an example of a disc spring.

[0095] The upper transmission shaft 1 is provided with a first polygonal transmission part, and the inner hole of the abutting protrusion 201 is a first polygonal through hole that matches with the first polygonal transmission part, so as to prevent the upper transmission shaft 1 from rotating, so that the upper transmission shaft 1 can only move along the axial direction of the hydraulic pulse vibration integrated tool. The power transmission is realized through the transmission surface 31 of the upper transmission shaft 1. It should be noted that a slide groove can be provided on one of the upper transmission shaft 1 and the abutting protrusion 201, and a slide rail that slides with the slide groove can be provided on the other, so as to prevent the upper transmission shaft 1 from rotating and only move axially. Figure 4 As shown, the first polygonal transmission part is a regular octagonal structure, and correspondingly, the first polygonal through hole is a regular octagonal through hole. Fig.10 As shown, the first polygonal transmission portion is a regular hexagonal structure, and correspondingly, the first polygonal through hole is a regular hexagonal through hole.

[0096] In some other embodiments, the upper transmission mechanism includes an upper cardan shaft 13, an upper water cap 12, an anti-drop sleeve 14 and an anti-drop rod 15. The upper cardan shaft 13 and the upper water cap 12 are placed in the upper cardan shaft housing 7, and the top of the upper water cap 12 is connected to the cam 11. Specifically, the upper water cap 12 is threadedly connected to the cam 11. The bottom end of the upper water cap 12 is connected to the top of the upper cardan shaft 13, and a second radial flow hole 38 is provided on the side wall of the upper water cap 12, which is connected to the inner cavity of the upper water cap 12. The inner cavity of the upper water cap 12 is connected to the inner cavity of the core shaft 8, and the second radial flow hole 38 is also connected to the inner cavity of the rotor drive mechanism. In order to facilitate the inflow of drilling fluid, the second radial flow hole 38 is inclined, and the entrance of the second radial flow hole 38 is inclined in the direction close to the upper cardan shaft 13.

[0097] The bottom end of the upper cardan shaft 13 is connected to the anti-drop rod 15, the anti-drop rod 15 is connected to the driving end of the rotor driving mechanism, the anti-drop sleeve 14 covers the anti-drop rod 15, and the anti-drop sleeve 14 is connected to the stator housing, and the diameter of the through hole opened on the anti-drop sleeve 14 is larger than the diameter of the anti-drop rod 15 and smaller than the diameter of the upper cardan shaft 13.

[0098] In some other embodiments, the lower transmission mechanism includes a lower universal shaft 19 , a lower transmission shaft housing 25 , a lower water cap 21 and a lower transmission shaft 30 .

[0099] The top end of the lower transmission shaft housing 25 is connected to the bottom end of the lower cardan shaft housing, and the lower cardan shaft 19, the lower water cap 21 and the lower transmission shaft 30 are all located in the lower transmission shaft housing 25 and the lower cardan shaft housing. The top end of the lower cardan shaft 19 is connected to the driving end of the rotor drive mechanism, and the bottom end of the lower cardan shaft 19 is connected to the top end of the lower water cap 21, specifically, the lower cardan shaft 19 is threadedly connected to the lower water cap 21. The bottom end of the lower water cap 21 is connected to the top end of the lower transmission shaft 30, specifically, the lower water cap 21 is threadedly connected to the lower transmission shaft 30. The side wall of the lower water cap 21 is provided with a third radial flow hole 39 that is connected to the inner cavity of the lower water cap 21, and the third radial flow hole 39 is also connected to the inner cavity of the rotor drive mechanism. The lower transmission shaft 30 is rotatably connected to the lower transmission shaft housing 25, and the bottom end of the lower transmission shaft 30 is connected to the drill bit. In order to facilitate the outflow of drilling fluid, the third radial flow holes 39 are arranged at an angle, and the outlets of the third radial flow holes 39 are inclined toward the direction close to the lower universal shaft 19 .

[0100] In some other embodiments, the lower transmission mechanism includes an upper TC bearing, a lower TC bearing, a string bearing 24 , a lock nut 26 and a spacer sleeve 27 .

[0101] The lower transmission shaft housing 25 includes a lower cardan shaft housing 20 and a lower transmission shaft housing 25, the top end of the lower cardan shaft housing 20 is connected to the stator housing, and the bottom end of the lower cardan shaft housing 20 is connected to the top end of the lower transmission shaft housing 25. Specifically, the bottom end of the lower cardan shaft housing 20 is threadedly connected to the top end of the lower transmission shaft housing 25.

[0102] The upper TC bearing and the lower TC bearing are respectively installed at the two ends of the inner wall of the lower transmission shaft housing 25, and are used to support the two ends of the lower transmission shaft 30. The string bearing 24 is installed between the upper TC bearing and the lower TC bearing through the lock nut 26 and the spacer 27, and is used to support the lower transmission shaft 30. Specifically, the lower end of the upper transmission shaft housing 2 is connected to the upper TC bearing static ring 23 through a thread, and the lower end of the lower transmission shaft housing 25 is connected to the lower TC bearing static ring 28 through a thread; the upper end of the lower transmission shaft 30 is respectively connected to the lower water cap 21 and the upper TC bearing dynamic ring 22 through a thread, and the outer side of the lower end of the lower transmission shaft 30 is connected to the lower TC bearing dynamic ring 29 through a thread.

[0103] In some other embodiments, the rotor driving mechanism includes a rotor 17, a stator 16 and a stator housing 18. Specifically, the rotor 17 is a motor rotor. It should be noted that the rotor 17 may also be an electric motor rotor, etc.

[0104] The top end of the stator housing 18 is connected to the upper cardan shaft housing 7 , and the bottom end of the stator housing 18 is connected to the lower cardan shaft housing 20 . Specifically, both ends of the stator housing 18 are threadedly connected to the upper cardan shaft housing 7 and the lower cardan shaft housing 20 , respectively.

[0105] The stator 16 is mounted on the inner wall of the stator housing 18, the rotor 17 is rotatably connected to the stator 16, the top end of the rotor 17 is connected to the anti-drop rod 15, and the bottom end of the rotor 17 is connected to the lower universal shaft 19. Specifically, the stator 16 is threadedly connected to the inner wall of the stator housing 18, the top end of the rotor 17 is threadedly connected to the anti-drop rod 15, and the bottom end of the rotor 17 is threadedly connected to the lower universal shaft 19.

[0106] like Fig. 9 and Fig.10 As shown, when the hydraulic pulse vibration integrated tool based on rotor drive is working, driven by the drilling fluid pressure energy, the motor rotor 17 in the rotor drive mechanism rotates along the inner side of the stator 16 to generate speed and torque, and is transmitted to the drill bit through the lower universal shaft 19, the lower water cap 21 and the lower transmission shaft 30 in the lower transmission mechanism to break the rock. At the same time, the upper end of the motor rotor 17 drives the cam 11 in the pulse generating mechanism to rotate through the anti-drop rod 15, the upper universal shaft 13 and the upper water cap 12 in the upper transmission mechanism. Since the mandrel 8 cannot rotate due to the restriction of the inner wall of the regular hexagonal through hole in the second joint 6, a speed difference is generated between the mandrel 8 and the cam 11, and under the influence of the speed difference, the roller 10 rolls along the upper wave surface 36 on the outer side of the upper end of the cam 11. In the process of the roller 10 moving from the bottom end to the top end of the upper wave surface 36, the roller 10 drives the core shaft 8 to move upward to overcome the preload force of the spring and insert the upper end of the core shaft 8 into the conical through hole 33, causing the flow area of ​​the drilling fluid to decrease when flowing through the conical through hole 33, so that the drilling fluid pressure in the upper vibration actuator increases, thereby pushing the piston 4 to compress the disc spring to drive the upper transmission shaft 1 to extend outward; in the process of the roller 10 moving from the top end to the bottom end of the upper wave surface 36, the core shaft 8 overcomes the preload force of the spring and moves upward to make the upper end of the core shaft 8 insert into the conical through hole 33, causing the flow area of ​​the drilling fluid to decrease when flowing through the conical through hole 33, so that the drilling fluid pressure in the upper vibration actuator increases, thereby pushing the piston 4 to compress the disc spring to drive the upper transmission shaft 1 to extend outward; in the process of the roller 10 moving from the top end to the bottom end of the upper wave surface 36, the core shaft 8 overcomes the preload force of the spring The piston 4 drives the upper transmission shaft 1 to retract inward under the action of the disc spring, and the upper transmission shaft 1 extends and retracts periodically, which will cause the entire tool to generate pulse vibration driven by the drilling fluid pressure, thereby increasing the rock breaking energy of the drill bit, reducing the friction and support pressure between the tool and the upper drill string and the well wall, and improving the transmission efficiency of the drilling pressure.

[0107] It should be noted that relational terms such as first and second, etc., are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprises" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprises a ..." does not exclude the presence of other identical elements in the process, method, article or device including the element.

[0108] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to the embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and inventive features disclosed herein.

[0109] The above are only preferred embodiments of the present invention. It should be pointed out that, for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A hydraulic pulse vibration integrated tool based on rotor drive, characterized in that: include: case; A vibration actuator, a pulse generating mechanism, an upper transmission mechanism, a rotor driving mechanism and a lower transmission mechanism connected in sequence end to end, wherein the vibration actuator, the pulse generating mechanism, the upper transmission mechanism, the rotor driving mechanism and the lower transmission mechanism are all installed in the housing, the lower transmission mechanism is used to connect with the drill bit, and the top end of the vibration actuator is used to connect with the drill string; The pulse generating mechanism can convert the rotation transmitted by the upper transmission mechanism into axial reciprocating movement, so as to realize the axial reciprocating movement of the vibration actuator; The pulse generating mechanism comprises a first joint, a second joint, a core shaft, a cam and a first elastic reset member; The first joint and the second joint are both connected to the housing, and the first joint is located at the bottom end of the vibration actuator, the top end of the second joint is connected to the bottom end of the first joint, the first joint is provided with a tapered through hole communicated with the inner cavity of the vibration actuator, and the diameter of the tapered through hole gradually increases in a direction away from the vibration actuator; The first elastic reset member is used to reset the mandrel, the top end of the cam supports the bottom end of the mandrel, the top surface of the cam is a wave surface, and the cam is transmission-connected to the driving end of the upper transmission mechanism; The mandrel is slidably mounted in the second joint along the axial direction of the mandrel, and the top end of the mandrel can extend into the tapered through hole; A first radial flow hole conductively connected to the top of the inner cavity of the core shaft is provided on the side wall of the core shaft, the first radial flow hole is conductively connected to the inner cavity of the second joint, and the inner cavity of the second joint is conductively connected to the bottom end of the conical through hole.

2. The rotor-driven hydraulic pulse vibration integrated tool according to claim 1, characterized in that: The mandrel is provided with a boss; The outer wall of the boss is slidably connected to the inner wall of the shell; The first elastic reset member is sheathed around the core shaft, and the top end of the first elastic reset member abuts against the bottom end of the second joint, and the bottom end of the first elastic reset member abuts against the top end of the boss.

3. The rotor-driven hydraulic pulse vibration integrated tool according to claim 2, characterized in that: The pulse generating mechanism further comprises a roller, a roller groove for accommodating the roller is formed at the bottom end of the boss, and the bottom end of the roller rolls along the top surface of the cam; or The bottom surface of the boss is a wave surface, and the bottom surface of the boss contacts the top surface of the cam; and / or A tapered portion is disposed at the top end of the mandrel, and a diameter of the tapered portion gradually increases along a direction from the top end of the mandrel to the bottom end of the mandrel.

4. The rotor-driven hydraulic pulse vibration integrated tool according to claim 3 is characterized in that: The upper transmission mechanism comprises an upper universal shaft, an upper water cap, an anti-drop sleeve and an anti-drop rod; The upper cardan shaft and the upper water cap are placed in the housing; The top end of the upper water cap is connected to the cam, the bottom end of the upper water cap is connected to the top end of the upper universal shaft, a second radial flow hole communicating with the inner cavity of the upper water cap is opened on the side wall of the upper water cap, the inner cavity of the upper water cap is communicated with the inner cavity of the core shaft, and the second radial flow hole is also communicated with the inner cavity of the rotor drive mechanism; The bottom end of the upper cardan shaft is connected to the anti-drop rod, the anti-drop rod is connected to the driving end of the rotor driving mechanism, the anti-drop sleeve covers the anti-drop rod, and the anti-drop sleeve is connected to the shell, and the diameter of the through hole opened on the anti-drop sleeve is larger than the diameter of the anti-drop rod and smaller than the diameter of the upper cardan shaft.

5. The rotor-driven hydraulic pulse vibration integrated tool according to claim 4, characterized in that: The lower transmission mechanism comprises a lower universal shaft, a lower water cap and a lower transmission shaft; The top end of the lower universal shaft is connected to the driving end of the rotor driving mechanism, the bottom end of the lower universal shaft is connected to the top end of the water cap, and the bottom end of the water cap is connected to the top end of the lower transmission shaft; A third radial flow hole communicating with the inner cavity of the water drop cap is provided on the side wall of the water drop cap, and the third radial flow hole is also communicating with the inner cavity of the rotor drive mechanism; The lower transmission shaft is rotatably connected to the housing, and the bottom end of the lower transmission shaft is connected to the drill bit.

6. The rotor-driven hydraulic pulse vibration integrated tool according to claim 5, characterized in that: The lower transmission mechanism also includes an upper TC bearing, a lower TC bearing, a string bearing, a lock nut and a spacer sleeve; The upper TC bearing and the lower TC bearing are respectively installed on the inner wall of the shell to support the two ends of the lower transmission shaft. The string bearing is installed between the upper TC bearing and the lower TC bearing through the lock nut and the spacer sleeve to support the lower transmission shaft.

7. The rotor-driven hydraulic pulse vibration integrated tool according to claim 6, characterized in that: The rotor driving mechanism comprises a rotor and a stator; The stator is mounted on the inner wall of the housing, the rotor is rotatably connected to the stator, the top end of the rotor is connected to the anti-drop rod, and the bottom end of the rotor is connected to the lower universal shaft.

8. The rotor-driven hydraulic pulse vibration integrated tool according to any one of claims 1 to 7, characterized in that: The vibration actuator comprises an upper transmission shaft, a second elastic reset member and a piston; The piston is connected to the bottom end of the upper transmission shaft, an abutment protrusion is provided on the inner wall of the shell, the top end of the second elastic reset member abuts against the top end of the piston, and the top end of the second elastic reset member abuts against the abutment protrusion.

9. The rotor-driven hydraulic pulse vibration integrated tool according to claim 8, characterized in that: The first elastic return member is a spring; and / or The second elastic reset member is a disc spring; and / or The upper transmission shaft is provided with a first polygonal transmission part, and the inner hole of the abutting protrusion is a first polygonal through hole that matches with the first polygonal transmission part; and / or The core shaft is provided with a second polygonal transmission part, and the inner hole of the second joint is a second polygonal through hole that fits with the second polygonal transmission part; and / or The housing comprises an upper transmission shaft housing, an upper cardan shaft housing, a stator housing, a lower cardan shaft housing and a lower transmission shaft housing. The upper transmission shaft is installed at the top of the upper transmission shaft housing, and the upper transmission shaft housing, the first joint, the second joint, the upper cardan shaft housing, the stator housing, the lower cardan shaft housing and the lower transmission shaft housing are connected end to end in sequence. The vibration actuator is installed in the upper transmission shaft housing. The pulse generating mechanism and the upper transmission mechanism are installed in the upper cardan shaft housing. The rotor drive mechanism is installed in the stator housing; The lower transmission mechanism is installed in the lower cardan shaft housing and the lower transmission shaft housing.

Images