Rotary impact integrated power drilling tool based on spiral mandrel drive

Abstract

The present invention discloses a rotary impact integrated power drill driven by a spiral mandrel, comprising: a housing; an impact mechanism, an upper transmission mechanism, a rotary drive mechanism and a lower transmission mechanism installed in the housing, the impact mechanism, the upper transmission mechanism, the rotary drive mechanism and the lower transmission mechanism can be sequentially connected in transmission, the lower transmission mechanism is used to connect with a drill bit, the top of the impact mechanism is used to connect with a drill string, and the impact mechanism can convert the rotation transmitted by the upper transmission mechanism into axial reciprocating movement to achieve impact on the upper transmission mechanism. Driven by the drilling fluid pressure energy, the rotary drive mechanism rotates to generate a rotation speed and torque, and is transmitted to the drill bit through the lower transmission mechanism to break the rock. At the same time, the rotary drive mechanism transmits power to the impact mechanism through the upper transmission mechanism, and the impact mechanism converts the rotation into axial reciprocating movement to achieve impact on the upper transmission mechanism, thereby improving the rock breaking efficiency and extending the service life of the drill bit.

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 rotary impact integrated power drilling tool driven by a spiral mandrel. Background Art

[0002] As the oil and gas exploration process continues to expand and the exploration area continues to expand, more and more difficult-to-drill and complex formations with high compressive strength and poor drillability are encountered during the drilling process. The rotary cutting and rock breaking method that uses conventional screw power drills to output high speed and high torque is no longer sufficient to effectively penetrate into the formation and break the rock, resulting in reduced rock breaking efficiency and short drill bit service life.

[0003] Therefore, how to improve rock breaking efficiency and extend the service life of the drill bit is a technical problem that needs to be solved urgently by technical personnel in this field. Summary of the invention

[0004] In view of this, an object of the present invention is to provide a rotary impact integrated power drill driven by a spiral mandrel, which can improve the rock breaking efficiency and extend the service life of the drill bit.

[0005] In order to achieve the above object, the present invention provides the following scheme:

[0006] A rotary impact integrated power drilling tool based on spiral mandrel drive, comprising:

[0007] case;

[0008] The impact mechanism, the upper transmission mechanism, the rotary drive mechanism and the lower transmission mechanism are installed in the housing, and the impact mechanism, the upper transmission mechanism, the rotary drive mechanism and the lower transmission mechanism can be sequentially connected in transmission, and the lower transmission mechanism is used to connect with the drill bit.

[0009] The top end of the impact mechanism is used to be connected to the drill string, and the impact mechanism can convert the rotation transmitted by the upper transmission mechanism into axial reciprocating movement to achieve impact on the upper transmission mechanism.

[0010] In a specific embodiment, the impact mechanism includes an upper joint, a hammer, a bushing and a reversing shaft;

[0011] The upper joint is sealed and connected to the top of the shell, the upper joint is connected to the drill string, and a limiting protrusion is provided on the inner wall of the shell;

[0012] The bottom end of the reversing shaft passes through the inner hole opened on the limiting protrusion and is drivably connected with the upper transmission mechanism, and the top end of the reversing shaft is rotatably sealed and inserted into the upper joint;

[0013] The bushing is sleeved outside the reversing shaft, and the top end of the bushing is seal-inserted in the upper joint, and the bottom end of the bushing is seal-inserted in the limiting protrusion;

[0014] The hammer is located in a cavity formed by the bushing, the upper joint, the housing and the limiting protrusion, and the hammer can slide and seal the sleeve outside the bushing;

[0015] Along the axial direction of the reversing shaft, an upper liquid inlet hole and a lower liquid inlet hole, both of which are connected to the central hole, are respectively opened on the side wall of the reversing shaft;

[0016] The side walls of the bushing are respectively provided with an upper flow hole and a lower flow hole along the axial direction of the bushing, and the hammer is respectively provided with an upper cavity and a lower cavity along the axial direction, the upper flow hole is communicated with the upper cavity of the hammer, and the lower flow hole is communicated with the lower cavity of the hammer, and when the upper liquid inlet hole is communicated with the upper flow hole, the lower liquid inlet hole and the lower flow hole are closed, and when the upper liquid inlet hole and the upper flow hole are closed, the lower liquid inlet hole and the lower flow hole are communicated.

[0017] In another specific embodiment, a plurality of protrusions are provided on the outer wall of the reversing shaft along the axial direction of the reversing shaft;

[0018] A drainage cavity is formed between adjacent protrusions;

[0019] The upper liquid inlet hole and the lower liquid inlet hole are both formed on the convex block;

[0020] A drainage hole communicating with the central hole is also provided on the side wall of the reversing shaft, and the drainage hole is communicated with the drainage cavity;

[0021] When the upper liquid inlet hole is connected to the upper flow hole, the liquid discharge cavity is connected to the lower flow hole;

[0022] When the lower liquid inlet hole is connected to the lower flow hole, the liquid discharge cavity is connected to the upper flow hole.

[0023] In another specific embodiment, the impact mechanism further comprises a nozzle;

[0024] The nozzle is installed in the central hole of the reversing shaft, located above the lower flow hole and close to the drainage hole.

[0025] In another specific embodiment, the number of the protrusions is 4, and the 4 protrusions are evenly distributed on the circumference of the reversing shaft. Each protrusion is respectively provided with one upper liquid inlet hole and one lower liquid inlet hole.

[0026] The number of the upper flow holes and the number of the lower flow holes are both 4, the 4 upper flow holes are evenly distributed on the bushing at the same height, the 4 lower flow holes are evenly distributed on the bushing at the same height and are located below the upper flow holes, the upper flow holes and the lower flow holes are staggered, and the upper flow hole is located in the middle of two adjacent lower flow holes;

[0027] or

[0028] The number of the protrusions is 2, and the two protrusions are evenly distributed on the circumference of the reversing shaft. Each protrusion is respectively provided with an upper liquid inlet hole and a lower liquid inlet hole.

[0029] The number of the upper flow holes and the number of the lower flow holes are both 2, the 2 upper flow holes are evenly distributed on the bushing at the same height, the 2 lower flow holes are evenly distributed on the bushing at the same height and are located below the upper flow holes, the upper flow holes and the lower flow holes are staggered, and the upper flow hole is located in the middle position of the two adjacent lower flow holes.

[0030] In another specific embodiment, the upper cavity is opened at the top end of the inner wall of the hammer, and the lower cavity is opened at the bottom end of the inner wall of the hammer;

[0031] or

[0032] The upper cavity is formed by the outer wall of the hammer, the upper joint and the inner wall of the shell, and the lower cavity is formed by the outer wall of the hammer, the limiting protrusion and the inner wall of the shell.

[0033] The top of the inner wall of the hammer is provided with an upper annular flow guide cavity, and the side wall of the hammer is provided with an upper flow guide hole connecting the upper annular flow guide cavity and the upper cavity.

[0034] A lower annular flow guide cavity is provided at the bottom end of the inner wall of the hammer, and a lower flow guide hole connecting the lower annular flow guide cavity and the lower cavity is provided on the side wall of the hammer.

[0035] In another specific embodiment, the upper transmission mechanism includes an upper cardan shaft, an upper connecting sleeve, an anti-drop sleeve and an upper connecting shaft;

[0036] The top end of the upper connecting sleeve is connected to the reversing shaft, the bottom end of the upper connecting sleeve is connected to the top end of the upper universal shaft, a first radial flow hole communicating with the inner cavity of the upper connecting sleeve is opened on the side wall of the upper connecting sleeve, the inner cavity of the upper connecting sleeve is communicated with the center hole of the reversing shaft, and the first radial flow hole is also communicated with the inner cavity of the rotary drive mechanism;

[0037] The bottom end of the upper cardan shaft is connected to the upper connecting shaft, the upper connecting shaft is connected to the driving end of the rotor driving mechanism, the anti-drop sleeve covers the upper connecting shaft, and the anti-drop sleeve is connected to the housing, and the diameter of the through hole opened on the anti-drop sleeve is larger than the diameter of the upper connecting shaft and smaller than the diameter of the upper cardan shaft;

[0038] and / or

[0039] The lower transmission mechanism comprises a lower universal shaft, a lower connecting sleeve and a lower transmission shaft;

[0040] The top end of the lower cardan shaft is connected to the driving end of the rotor driving mechanism, the bottom end of the lower cardan shaft is connected to the top end of the lower connecting sleeve, and the bottom end of the lower connecting sleeve is connected to the top end of the lower transmission shaft;

[0041] A second flow hole communicating with the inner cavity of the lower connecting sleeve is provided on the side wall of the lower connecting sleeve, and the second flow hole is also communicating with the inner cavity of the rotor driving mechanism;

[0042] The bottom end of the lower transmission shaft is connected to the drill bit.

[0043] In another specific embodiment, the lower transmission mechanism further comprises an upper bearing, a lower bearing, a ball bearing set, a clamping sleeve and an adjustment ring;

[0044] The upper bearing and the lower bearing are respectively installed in the housing to support the two ends of the lower transmission shaft. The ball bearing group is installed between the upper bearing and the lower bearing through the fastening sleeve and the adjustment ring to support the lower transmission shaft.

[0045] In another specific embodiment, the rotor drive mechanism includes a helical mandrel and a helical sleeve;

[0046] The spiral sleeve is mounted on the inner wall of the shell, the spiral mandrel is rotatably connected to the spiral sleeve, the top end of the spiral mandrel is connected to the upper connecting shaft, and the bottom end of the spiral mandrel is connected to the lower universal shaft.

[0047] In another specific embodiment, the housing includes a hammer housing, a spindle housing, a lower cardan shaft housing, and a lower drive shaft housing;

[0048] The hammer housing, the core shaft housing, the lower cardan shaft housing and the lower transmission shaft housing are connected end to end in sequence;

[0049] The limiting protrusion is arranged on the inner wall of the hammer housing;

[0050] The upper joint is connected to the top end of the hammer housing;

[0051] The impact mechanism and the upper transmission mechanism are both placed in the hammer housing;

[0052] The rotary drive mechanism is placed in the spindle housing;

[0053] The lower transmission mechanism is installed in the lower cardan shaft housing and the lower transmission shaft housing.

[0054] 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.

[0055] Without being limited to any theory, it can be seen from the above disclosure that the rotary impact integrated power drill tool based on the spiral mandrel drive disclosed by the present invention, when in use, connects the lower transmission mechanism to the drill bit, and the top of the impact mechanism is connected to the drill string. Driven by the drilling fluid pressure energy, the rotary drive mechanism rotates to generate a rotation speed and torque, and transmits it to the drill bit through the lower transmission mechanism to break the rock. At the same time, the rotary drive mechanism transmits power to the impact mechanism through the upper transmission mechanism, and the impact mechanism converts the rotation into axial reciprocating movement to achieve the impact on the upper transmission mechanism. The present invention can not only realize the high-speed and high-torque rotation function, but also generate a high-frequency axial impact function, thereby realizing the coupled rock breaking function under multiple loads. The present invention improves the rock breaking efficiency and extends the service life of the drill bit. BRIEF DESCRIPTION OF THE DRAWINGS

[0056] 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.

[0057] Figure 1 A schematic diagram of the overall structure of a rotary impact integrated power drill driven by a spiral mandrel provided by the present invention;

[0058] Figure 2 for Figure 1 A schematic diagram of the enlarged structure of part I;

[0059] Figure 3 for Figure 1 A schematic diagram of the enlarged structure of part II;

[0060] Figure 4 For along Figure 1 Schematic diagram of the cross-sectional structure of section AA in FIG.

[0061] Figure 5 For along Figure 1Schematic diagram of the cross-sectional structure of the BB section in FIG.

[0062] Figure 6 A schematic cross-sectional view of the hammer provided by the present invention;

[0063] Figure 7 A schematic diagram of the three-dimensional structure of the bushing provided by the present invention;

[0064] Figure 8 A schematic diagram of the three-dimensional structure of the reversing shaft provided by the present invention;

[0065] Fig. 9 Another structural schematic diagram of part I provided by the present invention;

[0066] Fig.10 For along Fig. 9 Schematic diagram of the cross-sectional structure of section AA in FIG.

[0067] Fig.11 For along Fig. 9 Schematic diagram of the cross-sectional structure of the BB section in FIG.

[0068] Fig.12 Another cross-sectional structural schematic diagram of the punch provided by the present invention;

[0069] Fig.13 A schematic cross-sectional structure diagram of the AA section when the number of the bumps provided by the present invention is 2;

[0070] Fig.14 The schematic diagram of the cross-sectional structure of the BB section when the number of the bumps provided by the present invention is 2.

[0071] in, Figure 1-14 middle:

[0072] 1 upper joint, 2 hammer, 3 bushing, 4 reversing shaft, 5 hammer housing, 6 nozzle, 7 thrust ball bearing, 8 upper connecting sleeve, 9 upper universal shaft, 10 anti-drop sleeve, 11 connecting shaft, 12 spiral mandrel, 13 spiral sleeve, 14 mandrel housing, 15 lower universal shaft, 16 lower universal shaft housing, 17 lower connecting sleeve, 18 upper bearing moving ring, 19 upper bearing static ring, 20 ball bearing group, 26 lower transmission shaft, 21 lower transmission shaft housing, 22 fastening sleeve, 23 adjustment ring, 24 lower bearing static ring, 25 lower bearing moving ring, 31 upper flow hole, 32 lower flow hole, 41 center hole, 42 upper liquid inlet hole, 43 drainage cavity, 44 lower liquid inlet hole, 45 drainage hole, 46 fan-shaped convex block, 51 upper cavity, 52 lower cavity, 53 upper annular guide cavity, 54 upper guide hole, 55 lower annular guide cavity, 56 lower guide hole. DETAILED DESCRIPTION

[0073] The following will be combined with the attached embodiment of the present invention Figure 1-14, 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.

[0074] 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.

[0075] like Figure 1-Figure 3 As shown, the present invention discloses a rotary impact integrated power drill tool based on spiral mandrel drive, wherein the rotary impact integrated power drill tool includes a shell, an impact mechanism, an upper transmission mechanism, a rotary drive mechanism and a lower transmission mechanism.

[0076] The impact mechanism, the upper transmission mechanism, the rotation drive mechanism and the lower transmission mechanism are installed in the housing. Specifically, the housing can be divided into multiple sections that can be detachably connected, which is convenient for installation between the various mechanisms, and each section of the housing can be set according to needs.

[0077] The impact mechanism, the upper transmission mechanism, the rotary drive mechanism and the lower transmission mechanism are sequentially transmission-connected, the top end of the impact mechanism is used to be connected with the drill string, and the lower transmission mechanism is used to be connected with the drill bit.

[0078] The impact mechanism can convert the rotation transmitted by the upper transmission mechanism into axial reciprocating movement to achieve impact on the upper transmission mechanism.

[0079] It should be noted that the upper transmission mechanism and the lower transmission mechanism can be any mechanism capable of achieving power transmission. The rotary drive mechanism is any mechanism capable of converting rotation into axial reciprocating movement.

[0080] In this article, the axial direction refers to the axis direction of the hydraulic pulse vibration integrated tool.

[0081] The rotary impact integrated power drill tool based on spiral mandrel drive disclosed in the present invention, when in use, connects the lower transmission mechanism to the drill bit, and the top of the impact mechanism is connected to the drill string. Driven by the drilling fluid pressure energy, the rotary drive mechanism rotates to generate rotation speed and torque, and transmits it to the drill bit through the lower transmission mechanism to break the rock. At the same time, the rotary drive mechanism transmits power to the impact mechanism through the upper transmission mechanism, and the impact mechanism converts the rotation into axial reciprocating movement to achieve the impact on the upper transmission mechanism, thereby driving the entire tool to generate axial vibration, thereby reducing the friction between the drill string and the well wall and improving the drilling pressure transmission efficiency. The present invention can not only realize the high-speed and high-torque rotation function, but also generate high-frequency axial impact function, thereby realizing the coupled rock breaking function under multiple loads. The present invention improves the rock breaking efficiency and prolongs the service life of the drill bit.

[0082] In some embodiments, the housing includes a hammer housing 5, a spindle housing 14, a lower cardan shaft housing 16, and a lower transmission shaft housing 21. The hammer housing 5, the spindle housing 14, the lower cardan shaft housing 16, and the lower transmission shaft housing 21 are connected end to end in sequence, and specifically, the hammer housing 5, the spindle housing 14, the lower cardan shaft housing 16, and the lower transmission shaft housing 21 are threadedly sealed in sequence end to end.

[0083] The upper joint 1 is threadedly and sealedly connected to the top end of the hammer housing 5. The impact mechanism and the upper transmission mechanism are both placed in the hammer housing 5. The rotary drive mechanism is placed in the spindle housing 14. The lower transmission mechanism is installed in the lower cardan shaft housing 16 and the lower transmission shaft housing 21.

[0084] In some of the embodiments, the impact mechanism includes an upper joint 1, a hammer 2, a bushing 3 and a reversing shaft. The upper joint 1 is sealed and connected to the top of the shell. The upper joint 1 is connected to the drill string. A limiting protrusion is provided on the inner wall of the shell. Specifically, the upper joint 1 is threadedly sealed and connected to the top of the hammer shell 5, and the limiting protrusion is provided on the inner wall of the hammer shell 5.

[0085] The bottom end of the reversing shaft passes through the inner hole opened on the limiting protrusion and is rotatably connected to the upper transmission mechanism. Specifically, the reversing shaft is supported by 7 thrust ball bearings installed in the shell, so that the rotary drive mechanism can transfer kinetic energy to the reversing shaft through the upper transmission mechanism, and the top end of the reversing shaft can be rotatably sealed and inserted into the upper joint 1.

[0086] The bushing 3 is sleeved outside the reversing shaft, and the top end of the bushing 3 is sealably inserted in the upper joint 1, and the bottom end of the bushing 3 is sealably inserted in the limiting protrusion. Specifically, the bushing 3 is threadedly connected in the limiting protrusion.

[0087] The hammer 2 is located in a cavity formed by the bushing 3, the upper joint 1, the shell and the limiting protrusion, and the hammer 2 can slide a sealing sleeve outside the bushing 3.

[0088] An upper liquid inlet hole and a lower liquid inlet hole 44 which are both in communication with the central hole 41 are respectively formed on the side wall of the reversing shaft along the axial direction of the reversing shaft.

[0089] The side wall of the bushing 3 is provided with an upper flow hole 31 and a lower flow hole 32 along the axial direction of the bushing 3. Figure 7 As shown, the hammer 2 is provided with an upper cavity 51 and a lower cavity 52 along the axial direction, the upper flow hole 31 is connected to the upper cavity 51 of the hammer 2, and the lower flow hole 32 is connected to the lower cavity 52 of the hammer 2, and when the upper liquid inlet hole is connected to the upper flow hole 31, the lower liquid inlet hole 44 is closed to the lower flow hole 32, and when the upper liquid inlet hole is closed to the upper flow hole 31, the lower liquid inlet hole 44 is connected to the lower flow hole 32. The rotary drive mechanism is started, and the power is transmitted to the reversing shaft through the upper transmission mechanism, and the reversing shaft rotates to realize the upper liquid inlet hole and the upper flow hole 31, or the lower liquid inlet hole 44 and the lower flow hole 32. When the upper fluid inlet hole is connected to the upper flow hole 31, the drilling fluid enters the upper chamber 51 through the center hole 41, the upper fluid inlet hole and the upper flow hole 31, driving the hammer 2 to move downward, generating a downward axial impact force; when the lower fluid inlet hole 44 is connected to the lower flow hole 32, the drilling fluid enters the lower chamber 52 through the center hole 41, the lower fluid inlet hole 44 and the lower flow hole 32, driving the hammer 2 to move upward, generating an upward axial impact force. The axial impact force generated by the reciprocating up and down motion of the hammer 2 inside the present invention can drive the entire tool to generate axial vibration, thereby reducing the friction between the drill string and the well wall and improving the drilling pressure transmission efficiency.

[0090] Furthermore, the present invention discloses that a plurality of protrusions 46 are provided on the outer wall of the reversing shaft along the axial direction of the reversing shaft, such as Figure 8 As shown, a drainage cavity 43 is formed between adjacent projections 46. In order to achieve uniform drainage, the projections 46 are evenly distributed in an annular shape on the circumference of the reversing shaft.

[0091] Specifically, the number of the protrusions 46 is at least 2. In order to achieve sealing between the outer wall of the protrusion 46 and the inner wall of the housing, the protrusion 46 is a fan-shaped protrusion.

[0092] The upper liquid inlet hole and the lower liquid inlet hole 44 are both opened on the protrusion 46. Specifically, the upper liquid inlet hole and the lower liquid inlet hole 44 are separated by a certain distance, and the upper liquid inlet hole and the lower liquid inlet hole 44 on the same protrusion 46 are located on the same straight line, and the straight line is parallel to the axis of the reversing shaft.

[0093] A drainage hole 45 communicating with the central hole 41 is also formed on the side wall of the reversing shaft, and the drainage hole 45 communicates with the drainage cavity 43 .

[0094] When the upper liquid inlet hole is connected to the upper flow hole 31 , the drainage cavity 43 is connected to the lower flow hole 32 , so that the drilling fluid in the lower cavity 52 can be discharged through the lower flow hole 32 , the drainage cavity 43 and the drainage hole 45 .

[0095] When the lower liquid inlet hole 44 is connected to the lower flow hole 32 , the drainage cavity 43 is connected to the upper flow hole 31 , so that the drilling fluid in the upper cavity 51 can be discharged through the upper flow hole 31 , the drainage cavity 43 and the drainage hole 45 .

[0096] In order to facilitate the discharge of the drilling fluid in the upper chamber 51 or the lower chamber 52, the impact mechanism disclosed in the present invention further includes a nozzle 6, which is installed in the central hole 41 of the reversing shaft, located above the lower flow hole 32 and close to the drainage hole 45. The drilling fluid flowing into the drainage chamber 43 flows into the central hole 41 through the drainage hole 45 under the jet entrainment action of the nozzle 6 and flows downward through the rotary drive mechanism and the lower transmission mechanism to the drill bit.

[0097] In some embodiments, the upper cavity 51 is opened at the top end of the inner wall of the hammer 2, and the lower cavity 52 is opened at the bottom end of the inner wall of the hammer 2. The inner wall of the hammer 2 between the upper cavity 51 and the lower cavity 52 is slidably sealed and connected to the outer wall of the bushing 3.

[0098] Furthermore, the present invention discloses that the number of the bumps 46 is 4, such as Figure 8 The four protrusions 46 are evenly distributed on the circumference of the reversing shaft, and each protrusion 46 is provided with an upper liquid inlet hole and a lower liquid inlet hole 44.

[0099] Correspondingly, the number of the upper flow holes 31 and the number of the lower flow holes 32 are both 4. Figure 7As shown. Four upper flow holes 31 are evenly distributed on the bushing 3 at the same height, and four lower flow holes 32 are evenly distributed on the bushing 3 at the same height and are located below the upper flow holes 31. The upper flow holes 31 and the lower flow holes 32 are staggered, and the upper flow hole 31 is located in the middle of two adjacent lower flow holes 32. When the rotary impact integrated power drill is working, the rotary drive mechanism rotates under the driving force of the drilling fluid pressure to generate speed and torque, and transmits it to the drill bit through the lower transmission mechanism to break the rock. At the same time, the upper end of the rotary drive mechanism drives the reversing shaft in the impact mechanism to rotate via the upper transmission mechanism. During the rotation of the reversing shaft, when the upper liquid inlet hole of the protrusion 46 is connected with the upper flow hole 31 of the bushing 3, the lower liquid inlet hole 44 of the protrusion 46 is closed, and the discharge cavity 43 is connected with the lower flow hole 32 of the bushing 3. Therefore, the drilling fluid in the center hole 41 flows into the upper cavity 51 through the upper liquid inlet hole and the upper flow hole 31 in turn, pushing the hammer 2 to accelerate downward to impact the shell to generate a downward axial impact force, and transmits it downward to the drill bit, thereby increasing the impact energy of the drill bit to break the rock. During the downward acceleration of the hammer 2, the drilling fluid in the lower cavity 52 flows into the discharge cavity 43 through the lower flow hole 32, and then flows into the center hole 41 through the discharge hole 45 under the jet suction action of the nozzle 6 and downwards through the rotary drive mechanism. When the lower fluid inlet hole 44 of the protrusion 46 is connected with the lower flow hole 32 of the bushing 3, the upper fluid inlet hole of the fan-shaped protrusion is closed, and the discharge cavity 43 is connected with the upper flow hole 31 of the bushing 3. Therefore, the drilling fluid in the center hole 41 flows into the lower cavity 52 through the lower fluid inlet hole 44 and the lower flow hole 32 in turn, pushing the hammer 2 to accelerate upward to impact the upper joint 1 to generate an upward axial impact force, thereby driving the entire drill string to generate axial vibration, which reduces the friction between the drill string and the well wall and improves the drilling pressure transmission efficiency. During the upward acceleration of the hammer 2, the drilling fluid in the upper cavity 51 flows into the discharge cavity 43 through the upper flow hole 31, and then flows into the center hole 41 through the discharge hole 45 under the jet suction action of the nozzle 6, and flows downward to the drill bit through the rotary drive mechanism and the lower transmission mechanism. Since the reversing shaft has four protrusions 46, a group of upper liquid inlet holes and lower liquid inlet holes 44 are respectively provided at the upper and lower ends of the protrusions 46, and a liquid discharge cavity 43 is provided between each protrusion 46, therefore, the hammer 2 will produce four axial reciprocating impacts for each rotation of the reversing shaft.

[0100] It should be noted that the number of bosses may also be other numbers, such as Fig.13 and 14As shown, there are two protrusions 46, which are evenly distributed on the circumference of the reversing shaft, and each protrusion 46 is provided with an upper liquid inlet hole and a lower liquid inlet hole 44. There are two upper flow holes 31 and two lower flow holes 32, and the two upper flow holes 31 are evenly distributed on the bushing 3 at the same height, and the two lower flow holes 32 are evenly distributed on the bushing 3 at the same height and are located below the upper flow holes 31. The upper flow holes 31 and the lower flow holes 32 are staggered, and the upper flow hole 31 is located in the middle of the two adjacent lower flow holes 32. Since the reversing shaft has two protrusions 46, a group of upper liquid inlet holes and lower liquid inlet holes 44 are respectively provided at the upper and lower ends of the protrusion 46, and a liquid discharge cavity 43 is provided between each protrusion 46, therefore, the hammer 2 will produce two axial reciprocating impacts for each rotation of the reversing shaft.

[0101] In some other embodiments, the upper cavity 51 is formed by the outer wall of the hammer 2, the upper joint 1 and the inner wall of the shell. Figure 6 As shown, the lower cavity 52 is formed by the outer wall of the hammer 2, the limiting protrusion and the inner wall of the shell. An upper annular flow guide cavity 53 is provided at the top of the inner wall of the hammer 2, an upper flow guide hole 54 connecting the upper annular flow guide cavity 53 and the upper cavity 51 is provided on the side wall of the hammer 2, a lower annular flow guide cavity 55 is provided at the bottom of the inner wall of the hammer 2, and a lower flow guide hole 56 connecting the lower annular flow guide cavity 55 and the lower cavity 52 is provided on the side wall of the hammer 2. Figure 9-12 As shown, the number of bosses is 4 as an example.

[0102] When the rotary impact integrated power drill is working, driven by the drilling fluid pressure energy, the rotary drive mechanism rotates to generate speed and torque, which are transmitted to the drill bit through the lower transmission mechanism to break the rock. At the same time, the rotary drive mechanism drives the reversing shaft in the mechanical impact mechanism to rotate via the upper transmission mechanism. During the rotation of the reversing shaft, when the upper liquid inlet hole of the boss is connected with the upper flow hole 31 of the bushing 3, the lower liquid inlet hole 44 of the boss is closed, and the discharge chamber 43 is connected with the lower flow hole 32 of the bushing 3. Therefore, the drilling fluid in the center hole 41 flows into the upper chamber 51 through the upper liquid inlet hole, the upper flow hole 31, the upper annular guide chamber 53, and the upper guide hole 54 in sequence, pushing the hammer 2 to accelerate downward to impact the hammer housing 5 to generate a downward axial impact force, and transmits it downward to the drill bit, thereby increasing the impact energy of the drill bit to break the rock. During the downward acceleration of the hammer 2, the drilling fluid in the lower chamber 52 flows into the discharge chamber 43 through the lower guide hole 56, the lower annular guide chamber 55, and the lower flow hole 32, and then, under the jet suction action of the nozzle 6, it flows into the center hole 41 through the discharge hole 45 and moves downward through the rotary drive When the lower liquid inlet hole 44 of the boss is connected with the lower flow hole 32 of the bushing 3, the upper liquid inlet hole of the boss is closed, and the discharge cavity 43 is connected with the upper flow hole 31 of the bushing 3. Therefore, the drilling fluid in the center hole 41 flows into the lower cavity 52 through the lower liquid inlet hole 44, the lower flow hole 32, the lower annular guide cavity 55 and the lower guide hole 56 in sequence, pushing the hammer 2 to accelerate upward to impact the upper joint 1 to generate an upward axial impact force, thereby driving the entire drill string to generate axial vibration, which reduces the friction between the drill string and the well wall and improves the drilling pressure transmission efficiency. During the upward acceleration of the hammer 2, the drilling fluid in the upper cavity 51 flows into the discharge cavity 43 through the upper guide hole 54, the upper annular guide cavity 53 and the upper flow hole 31, and then flows into the center hole 41 through the discharge hole 45 under the jet suction action of the nozzle 6 and flows downward to the drill bit through the rotary drive mechanism and the lower transmission mechanism. Every time the reversing shaft rotates one circle, the hammer 2 will produce four axial reciprocating impacts.

[0103] In some of the embodiments, the upper transmission mechanism includes an upper universal joint shaft 9 , an upper connecting sleeve 8 , an anti-drop sleeve 10 and a connecting shaft 11 .

[0104] The top end of the upper connecting sleeve 8 is connected to the reversing shaft, and the bottom end of the upper connecting sleeve 8 is connected to the top end of the upper cardan shaft 9. Specifically, both ends of the upper connecting sleeve 8 are threadedly connected to the reversing shaft and the upper cardan shaft 9 respectively.

[0105] A first radial flow hole communicating with the inner cavity of the upper connecting sleeve 8 is provided on the side wall of the upper connecting sleeve 8 . The inner cavity of the upper connecting sleeve 8 communicates with the central hole 41 of the reversing shaft. The first radial flow hole also communicates with the inner cavity of the rotary drive mechanism.

[0106] The bottom end of the upper cardan shaft 9 is connected to the connecting shaft 11, the connecting shaft 11 is connected to the driving end of the rotor driving mechanism, the anti-drop sleeve 10 is wrapped around the connecting shaft 11, and the anti-drop sleeve 10 is connected to the housing, and the diameter of the through hole opened on the anti-drop sleeve 10 is larger than the diameter of the connecting shaft 11 and smaller than the diameter of the upper cardan shaft 9.

[0107] In some other embodiments, the lower transmission mechanism includes a lower universal shaft 15, a lower connecting sleeve 17 and a lower transmission shaft 26, the top end of the lower universal shaft 15 is connected to the driving end of the rotor driving mechanism, the bottom end of the lower universal shaft 15 is connected to the top end of the lower connecting sleeve 17, specifically, the lower universal shaft 15 is threadedly connected to the lower connecting sleeve 17. The bottom end of the lower connecting sleeve 17 is connected to the top end of the lower transmission shaft 26, specifically, the lower connecting sleeve 17 is threadedly connected to the lower transmission shaft 26.

[0108] A second flow hole communicating with the inner cavity of the lower connecting sleeve 17 is provided on the side wall of the lower connecting sleeve 17. The second flow hole is also communicated with the inner cavity of the rotor driving mechanism. The bottom end of the lower transmission shaft 26 is connected to the drill bit.

[0109] In some other embodiments, the lower transmission mechanism further includes an upper bearing, a lower bearing, a ball bearing set 20 , a fastening sleeve 22 and an adjustment ring 23 .

[0110] The upper bearing and the lower bearing are respectively installed in the housing to support both ends of the lower transmission shaft 26 . The ball bearing group 20 is installed between the upper bearing and the lower bearing through the fastening sleeve 22 and the adjustment ring 23 to support the lower transmission shaft 26 .

[0111] The top end of the lower cardan shaft housing 16 is connected to the rotor drive mechanism, and the bottom end of the lower cardan shaft housing 16 is connected to the top end of the lower transmission shaft housing 21. Specifically, the bottom end of the lower cardan shaft housing 16 is threadedly connected to the top end of the lower transmission shaft housing 21.

[0112] The upper bearing and the lower bearing are respectively installed at the two ends of the inner wall of the lower transmission shaft housing 21, and are used to support the two ends of the lower transmission shaft 26. The ball bearing group 20 is installed between the upper bearing and the lower bearing through the fastening sleeve 22 and the adjustment ring 23, and is used to support the lower transmission shaft 26. Specifically, the lower end of the upper transmission shaft housing is connected to the upper bearing static ring 19 through a thread, and the lower end of the lower transmission shaft housing 21 is connected to the lower bearing static ring 24 through a thread; the upper end of the lower transmission shaft 26 is respectively connected to the lower connecting sleeve 17 and the upper bearing dynamic ring 18 through a thread, and the outer side of the lower end of the lower transmission shaft 26 is connected to the lower bearing dynamic ring 25 through a thread.

[0113] In some other embodiments, the rotor driving mechanism includes a spiral mandrel 12 and a spiral sleeve 13, the spiral sleeve 13 is mounted on the inner wall of the housing, the spiral mandrel 12 is rotatably connected to the spiral sleeve 13, the top end of the spiral mandrel 12 is connected to the connecting shaft 11, and the bottom end of the spiral mandrel 12 is connected to the lower universal shaft 15. When the rotary impact integrated power drilling tool is working, driven by the drilling fluid pressure energy, the spiral mandrel 12 in the rotary driving mechanism rotates along the inner side of the spiral sleeve 13 to generate a rotation speed and torque, and is transmitted to the drill bit through the lower universal shaft 15, the lower connecting sleeve 17 and the lower transmission shaft 26 in the lower transmission mechanism to break the rock.

[0114] The present invention has the following beneficial effects:

[0115] (1) The present invention adopts an integrated design concept, effectively integrating the rotary drive mechanism, the upper and lower transmission mechanism and the impact mechanism, thereby improving the integration of the tool;

[0116] (2) The present invention can not only realize the high-speed and high-torque rotation function, but also generate high-frequency axial impact function, thereby realizing the coupled rock breaking function under multiple loads;

[0117] (3) The high-speed and high-torque rotation function and the high-frequency axial impact function realized by the present invention are respectively executed by different mechanisms, which are independent of each other and do not interfere with each other, thereby ensuring the effective transmission of energy and improving the rock breaking energy;

[0118] (4) The axial impact force generated by the reciprocating motion of the hammer 2 inside the present invention can drive the entire tool housing and the upper drill string to generate axial vibration, thereby reducing the friction between the drill string and the well wall and improving the drilling pressure transmission efficiency.

[0119] (5) The axial impact frequency achieved by the present invention is determined by the product of the rotation speed of the spiral mandrel 12 and the number of the fan-shaped protrusions 46 on the reversing shaft. It is not affected by the fluctuation of the drilling fluid pressure, and the impact effect is more stable.

[0120] 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.

[0121] 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.

[0122] 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 rotary impact integrated power drill driven by a spiral mandrel, characterized in that: include: case; The impact mechanism, the upper transmission mechanism, the rotary drive mechanism and the lower transmission mechanism are installed in the housing, and the impact mechanism, the upper transmission mechanism, the rotary drive mechanism and the lower transmission mechanism can be sequentially connected in transmission, and the lower transmission mechanism is used to connect with the drill bit. The top end of the impact mechanism is used to connect with the drill string, and the impact mechanism can convert the rotation transmitted by the upper transmission mechanism into axial reciprocating movement to achieve impact on the upper transmission mechanism; The impact mechanism comprises an upper joint, a hammer, a bushing and a reversing shaft; The upper joint is sealingly connected to the top of the shell, the upper joint is connected to the drill string, and a limiting protrusion is provided on the inner wall of the shell; The bottom end of the reversing shaft passes through the inner hole provided on the limiting protrusion and is drivably connected to the upper transmission mechanism, and the top end of the reversing shaft is rotatably sealed and inserted into the upper joint; The bushing is sleeved outside the reversing shaft, and the top end of the bushing is seal-inserted in the upper joint, and the bottom end of the bushing is seal-inserted in the limiting protrusion; The hammer is located in a cavity formed by the bushing, the upper joint, the housing and the limiting protrusion, and the hammer can slide and seal the sleeve outside the bushing; Along the axial direction of the reversing shaft, an upper liquid inlet hole and a lower liquid inlet hole, both of which are connected to the central hole, are respectively opened on the side wall of the reversing shaft; The side wall of the bushing is provided with an upper flow hole and a lower flow hole along the axial direction of the bushing, and the hammer is provided with an upper cavity and a lower cavity along the axial direction, the upper flow hole is communicated with the upper cavity of the hammer, and the lower flow hole is communicated with the lower cavity of the hammer, and when the upper liquid inlet hole is communicated with the upper flow hole, the lower liquid inlet hole is closed with the lower flow hole, and when the upper liquid inlet hole is closed with the upper flow hole, the lower liquid inlet hole is communicated with the lower flow hole; When the rotary drive mechanism is started, power is transmitted to the reversing shaft through the upper transmission mechanism, and the reversing shaft rotates to connect the upper liquid inlet hole with the upper flow hole, or to connect the lower liquid inlet hole with the lower flow hole; when the upper liquid inlet hole is connected with the upper flow hole, the drilling fluid enters the upper chamber through the center hole, the upper liquid inlet hole and the upper flow hole, driving the hammer to move downward, generating a downward axial impact force; when the lower liquid inlet hole is connected with the lower flow hole, the drilling fluid enters the lower chamber through the center hole, the lower liquid inlet hole and the lower flow hole, driving the hammer to move upward, generating an upward axial impact force; thus, the axial impact force generated by driving the hammer to reciprocate up and down during the rotation process; Along the axial direction of the reversing shaft, a plurality of protrusions are arranged on the outer wall of the reversing shaft; A drainage cavity is formed between adjacent protrusions; The upper liquid inlet hole and the lower liquid inlet hole are both formed on the convex block; A drainage hole communicating with the central hole is also provided on the side wall of the reversing shaft, and the drainage hole is communicated with the drainage cavity; When the upper liquid inlet hole is connected to the upper flow hole, the liquid discharge cavity is connected to the lower flow hole; When the lower liquid inlet hole is connected to the lower flow hole, the liquid discharge cavity is connected to the upper flow hole.

2. The rotary impact integrated power drill driven by a spiral mandrel according to claim 1, characterized in that: The impact mechanism also includes a nozzle; The nozzle is installed in the central hole of the reversing shaft, located above the lower flow hole and close to the drainage hole.

3. The rotary impact integrated power drill driven by a spiral mandrel according to claim 2, characterized in that: The number of the protrusions is 4, and the 4 protrusions are evenly distributed on the circumference of the reversing shaft. Each protrusion is respectively provided with one upper liquid inlet hole and one lower liquid inlet hole. The number of the upper flow holes and the number of the lower flow holes are both 4, the 4 upper flow holes are evenly distributed on the bushing at the same height, the 4 lower flow holes are evenly distributed on the bushing at the same height and are located below the upper flow holes, the upper flow holes and the lower flow holes are staggered, and the upper flow hole is located in the middle of two adjacent lower flow holes; or The number of the protrusions is 2, and the two protrusions are evenly distributed on the circumference of the reversing shaft. Each protrusion is respectively provided with an upper liquid inlet hole and a lower liquid inlet hole. The number of the upper flow holes and the number of the lower flow holes are both 2, the 2 upper flow holes are evenly distributed on the bushing at the same height, the 2 lower flow holes are evenly distributed on the bushing at the same height and are located below the upper flow holes, the upper flow holes and the lower flow holes are staggered, and the upper flow hole is located in the middle position of the two adjacent lower flow holes.

4. The integrated rotary impact power drill driven by a spiral mandrel according to claim 3, characterized in that: The upper cavity is opened at the top end of the inner wall of the hammer, and the lower cavity is opened at the bottom end of the inner wall of the hammer; or The upper cavity is formed by the outer wall of the hammer, the upper joint and the inner wall of the shell, and the lower cavity is formed by the outer wall of the hammer, the limiting protrusion and the inner wall of the shell. The top of the inner wall of the hammer is provided with an upper annular flow guide cavity, and the side wall of the hammer is provided with an upper flow guide hole connecting the upper annular flow guide cavity and the upper cavity. A lower annular flow guide cavity is provided at the bottom end of the inner wall of the hammer, and a lower flow guide hole connecting the lower annular flow guide cavity and the lower cavity is provided on the side wall of the hammer.

5. The rotary impact integrated power drill driven by a spiral mandrel according to claim 1, characterized in that: The upper transmission mechanism comprises an upper universal shaft, an upper connecting sleeve, an anti-drop sleeve and an upper connecting shaft; The top end of the upper connecting sleeve is connected to the reversing shaft, the bottom end of the upper connecting sleeve is connected to the top end of the upper universal shaft, a first radial flow hole communicating with the inner cavity of the upper connecting sleeve is opened on the side wall of the upper connecting sleeve, the inner cavity of the upper connecting sleeve is communicated with the center hole of the reversing shaft, and the first radial flow hole is also communicated with the inner cavity of the rotary drive mechanism; The bottom end of the upper cardan shaft is connected to the upper connecting shaft, the upper connecting shaft is connected to the driving end of the rotor driving mechanism, the anti-drop sleeve covers the upper connecting shaft, and the anti-drop sleeve is connected to the housing, and the diameter of the through hole opened on the anti-drop sleeve is larger than the diameter of the upper connecting shaft and smaller than the diameter of the upper cardan shaft; and / or The lower transmission mechanism comprises a lower universal shaft, a lower connecting sleeve and a lower transmission shaft; The top end of the lower cardan shaft is connected to the driving end of the rotor driving mechanism, the bottom end of the lower cardan shaft is connected to the top end of the lower connecting sleeve, and the bottom end of the lower connecting sleeve is connected to the top end of the lower transmission shaft; A second flow hole communicating with the inner cavity of the lower connecting sleeve is provided on the side wall of the lower connecting sleeve, and the second flow hole is also communicating with the inner cavity of the rotor driving mechanism; The bottom end of the lower transmission shaft is connected to the drill bit.

6. The rotary impact integrated power drill driven by a spiral mandrel according to claim 5, characterized in that: The lower transmission mechanism also includes an upper bearing, a lower bearing, a ball bearing assembly, a fastening sleeve and an adjustment ring; The upper bearing and the lower bearing are respectively installed in the housing to support the two ends of the lower transmission shaft. The ball bearing group is installed between the upper bearing and the lower bearing through the fastening sleeve and the adjustment ring to support the lower transmission shaft.

7. The integrated rotary impact power drill driven by a spiral mandrel according to claim 6, characterized in that: The rotor driving mechanism comprises a spiral mandrel and a spiral sleeve; The spiral sleeve is mounted on the inner wall of the shell, the spiral mandrel is rotatably connected to the spiral sleeve, the top end of the spiral mandrel is connected to the upper connecting shaft, and the bottom end of the spiral mandrel is connected to the lower universal shaft.

8. The rotary impact integrated power drill driven by a spiral mandrel according to any one of claims 1 to 7, characterized in that: The housing comprises a hammer housing, a spindle housing, a lower cardan shaft housing and a lower transmission shaft housing; The hammer housing, the spindle housing, the lower cardan shaft housing and the lower transmission shaft housing are connected end to end in sequence; The limiting protrusion is arranged on the inner wall of the hammer housing; The upper joint is connected to the top end of the hammer housing; The impact mechanism and the upper transmission mechanism are both placed in the hammer housing; The rotary drive mechanism is placed in the spindle housing; The lower transmission mechanism is installed in the lower cardan shaft housing and the lower transmission shaft housing.

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