A composite impact drilling speed-up tool

Abstract

The application relates to a composite impact drilling speed increasing tool, belonging to the technical field of drilling tools, which comprises a sleeve, a reciprocating hammer unit, a hammer body axially slidably connected in the sleeve, and an impact hammer rotatably connected in the hammer body, a reversing sleeve rotatably connected in the impact hammer, a reversing cabin arranged on the reversing sleeve, and a reversing flow channel hole arranged on the hammer body, a flow channel switch unit, a stop ring arranged on the surface of the hammer body, and a transmission mechanism connected between the sleeve and the stop ring, the transmission mechanism being used for converting the axial movement of the stop ring into rotary movement to open or close the reversing flow channel hole. When the drilling tool is lifted, the axial movement of the stop ring can be converted into rotary movement, so that the stop ring rotates relative to the hammer body while axially moving with the hammer body, the reversing flow channel hole is covered, high-pressure drilling fluid cannot flow into the reversing cabin, high-frequency composite impact is stopped, vibration and abrasion caused by idling are avoided, and the service life and safety of the tool are improved.

Description

Technical Field

[0001] This application relates to the field of drilling tool technology, and in particular to a composite impact drilling speed-up tool. Background Technology

[0002] In oil and gas drilling, for complex and difficult-to-drill formations such as hard, hard-intercalated, hard-brittle, hard-plastic, and gravelly formations, composite impact drilling speed-up tools are often used to assist in rock breaking. These tools convert the high-pressure energy of the drilling fluid into impact energy, applying additional high-frequency composite impact loads to the drill bit. Among them, the torsional impact eliminates the "stick-slip" phenomenon of the drill bit at the bottom of the well and reduces the wear of the composite blades, while the axial impact increases the drill bit's cutting depth, forming volumetric fracturing and improving the drill bit's rock-breaking efficiency.

[0003] In related technologies, patent CN117780261A discloses a composite impact drilling speed-up tool. This tool connects to other equipment via an upper drill string and to the drill bit at the bottom of the well, utilizing the energy generated by the drilling fluid flowing through its interior to continuously generate high-frequency composite impact loads. However, in practical operation, the following technical defects exist: When the drill string is pulled up, causing the drill bit to detach from the bottom of the well, the continuous impact load output by the tool acts directly on the drill bit body. Since the drill bit has lost contact with the rock at this time, the impact energy cannot be converted into effective rock breaking, resulting in wasted work. This non-contact energy transfer not only wastes energy but also causes abnormal vibrations in the tool's internal structure, exacerbates the mechanical wear of key components, and ultimately leads to a shortened overall tool life and reduced safety in downhole operations.

[0004] Therefore, it is necessary to study and improve the above structure. By optimizing the structure of the tool, the impact load can be made to act accurately when the drill bit contacts the bottom of the well, eliminating the ineffective impact output in non-operational states, thereby improving the engineering practical value and operational reliability of the equipment. Summary of the Invention

[0005] To address any of the shortcomings or deficiencies mentioned in the background technology, this application provides a composite impact drilling speed-up tool that can eliminate ineffective impact output during non-operational states, thereby improving the engineering practicality and operational reliability of the equipment.

[0006] This application provides a composite impact drilling speed-up tool, including: Sleeve; A reciprocating hammer unit includes a hammer body axially slidably connected to the sleeve, and an impact hammer rotatably connected to the hammer body. A reversing sleeve is rotatably connected inside the impact hammer, and a reversing chamber is provided on the reversing sleeve. A reversing flow channel hole for conveying drilling fluid to the reversing chamber is provided on the hammer body. The flow channel switching unit includes a retaining ring disposed on the surface of the hammer body, and a transmission mechanism connected between the sleeve and the retaining ring. The transmission mechanism is used to convert the axial movement of the retaining ring into rotational movement to open or close the reversing flow channel hole.

[0007] In some embodiments, the retaining ring is provided with a through hole for communicating with the reversing flow channel hole, and the transmission mechanism includes a protrusion connected to the retaining ring and a pressure rod connected to the sleeve, wherein the protrusion is provided with an inclined surface that presses against the pressure rod.

[0008] In some embodiments, the transmission mechanism further includes a return spring connected at both ends to the retaining ring and the hammer body respectively. The return spring is used to drive the retaining ring to rotate and reset, so that the retaining ring closes the reversing flow channel hole.

[0009] In some embodiments, a sliding block and a sliding groove are provided between the hammer body and the sleeve, the sliding groove extending along the axial direction of the sleeve.

[0010] In some embodiments, the hammer body includes an upper end cover, a hammer sleeve, a lower end cover, and a lower connector that are fixedly connected in sequence along the axial direction. The impact hammer is located inside the hammer sleeve. The reversing flow channel hole is located on the upper end cover. The retaining ring is fitted to the surface of the upper end cover and rotatably connected. The upper end cover is sleeved on the reversing sleeve. The lower end cover communicates with the reversing sleeve.

[0011] In some embodiments, a stationary valve is fixedly fitted on the upper end cover and sleeved on the outside of the reversing sleeve. A moving valve is rotatably connected inside the stationary valve and fixedly connected to the reversing sleeve. A valve cover is fixed on the stationary valve to axially limit the moving valve. The central hole of the moving valve communicates with the reversing sleeve. The moving valve is provided with a first arc-shaped flow channel groove, the stationary valve is provided with a second arc-shaped flow channel groove that matches the first arc-shaped flow channel groove, the reversing sleeve is provided with a reversing sleeve bypass hole, and the stationary valve is provided with a stationary valve bypass hole that matches the reversing sleeve bypass hole.

[0012] In some embodiments, the impact hammer has a ring structure, with hammer heads symmetrically arranged on the outer ring surface, and a first flow channel groove and a second flow channel groove on the hammer head located on both sides of the hammer head; and an inner key located in the reversing chamber is symmetrically arranged on the inner ring surface of the impact hammer, with a first flow channel groove and a second flow channel groove on both sides of the inner key.

[0013] In some embodiments, an upper nozzle is provided inside the reversing sleeve, and a lower nozzle communicating with the reversing sleeve is provided inside the lower end cover. The reversing chambers are symmetrically arranged, and a first flow channel groove and a second flow channel groove of the reversing sleeve are provided on the reversing chambers located between the two reversing chambers on both sides. A first low-pressure flow channel groove and a second low-pressure flow channel groove of the reversing sleeve are also symmetrically arranged on the reversing sleeve.

[0014] In some embodiments, the hammer sleeve is symmetrically provided with an impact chamber for accommodating the hammer head, and a first reversing flow channel groove and a second reversing flow channel groove of the hammer sleeve located between the two impact chambers and communicating with the reversing flow channel hole. The hammer sleeve is also symmetrically provided with a low-pressure flow channel groove of the hammer sleeve.

[0015] In some embodiments, the lower end cover is provided with a first low-pressure flow channel groove of the lower end cover that communicates with the low-pressure flow channel groove of the hammer sleeve, and two second low-pressure flow channel grooves of the lower end cover that communicate with the first low-pressure flow channel groove of the reversing sleeve and the second low-pressure flow channel groove of the reversing sleeve respectively. The lower connector is provided with a lower connector low-pressure flow channel groove that connects to the first low-pressure flow channel groove of the lower end cover, and the second low-pressure flow channel groove of the lower end cover is connected to the center hole of the lower connector.

[0016] The beneficial effects of the technical solution provided in this application include: This application provides a composite impact drilling speed-up tool, which has a reciprocating hammer unit and a flow channel switching unit disposed within its sleeve. The reciprocating hammer unit includes a hammer body axially slidably connected within the sleeve, and an impact hammer rotatably connected within the hammer body. A reversing sleeve is rotatably connected within the impact hammer, and a reversing chamber is disposed on the reversing sleeve. The hammer body is provided with a reversing flow channel hole for conveying drilling fluid to the reversing chamber. The flow channel switching unit includes a retaining ring disposed on the surface of the hammer body, and a transmission mechanism connected between the sleeve and the retaining ring. The transmission mechanism is used to convert the axial movement of the retaining ring into rotational movement to open or close the reversing flow channel hole.

[0017] Therefore, when the drill string is lifted, the drill bit is lifted off the bottom of the well along with the speed-up tool. The sleeve of the speed-up tool undergoes axial displacement relative to the hammer body, and the retaining ring moves axially with the hammer body. The transmission mechanism converts the axial movement of the retaining ring into rotational motion, so that the retaining ring rotates relative to the hammer body while moving axially with it. This blocks the reversing flow channel hole, preventing high-pressure drilling fluid from flowing into the reversing chamber of the reversing sleeve. This prevents the impact hammer from using the high and low pressure difference of the drilling fluid for reversing, thereby stopping the generation of high-frequency composite impacts, avoiding vibration and wear caused by idling, and improving the tool's service life and safety. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the speed-up tool according to an embodiment of this application; Figure 2 This is a schematic diagram of the transmission mechanism according to an embodiment of this application; Figure 3 This is a schematic diagram of the structure of the moving valve according to an embodiment of this application; Figure 4 This is a schematic diagram of the static valve according to an embodiment of this application; Figure 5 This is a schematic diagram of the retaining ring structure according to an embodiment of this application; Figure 6 This is a schematic diagram of the upper end cover in an embodiment of this application; Figure 7 This is a schematic diagram of the hammer sleeve according to an embodiment of this application; Figure 8 This is a schematic diagram of the impact hammer according to an embodiment of this application; Figure 9 This is a schematic diagram of the reversing sleeve according to an embodiment of this application; Figure 10 This is a schematic diagram of the structure of the lower end cover according to an embodiment of this application; Figure 11 This is a schematic diagram of the lower connector according to an embodiment of this application; Figure 12 for Figure 1 Top view of the cross section at point AA (through hole connects to the reversing flow channel hole); Figure 13 for Figure 1 Top view of the cross-section at point BB; Figure 14 This is a schematic diagram of the hammer impact chamber according to an embodiment of this application; Figure 15 This is a structural schematic diagram of the internal key impact reversing chamber according to an embodiment of this application.

[0020] The attached diagram lists the components represented by each number as follows: 1. Sleeve; 101. Sleeve center hole; 102. Sleeve mounting hole; 103. Slide groove; 2. Valve cover; 3. Dynamic valve; 31. First arc-shaped flow channel groove; 32. First ball groove; 33. Protruding key; 34. Dynamic valve center hole; 4. Upper nozzle; 5. Ball; 6. Static valve; 61. Second arc-shaped flow channel groove; 62. Second ball groove; 63. Static valve center hole; 64. Static valve bypass hole; 7. Pressure rod; 8. Plug; 9. Retaining ring; 91. Protrusion; 92. Bevel; 93. Through hole; 10. Hook; 11. Return spring; 12. Top cover; 121. Reversing flow channel hole; 122. Bolt countersunk hole; 123. Annular boss; 13. Pressure block; 14. Hammer sleeve; 141. Hammer sleeve first reversing flow channel groove; 142. Hammer sleeve second reversing flow channel groove; 143. Hammer sleeve low-pressure flow channel groove; 144. Impact chamber; 15. Impact hammer; 151. Hammer head; 152. Inner key; 153. First flow channel groove of hammer head; 154. Second flow channel groove of hammer head; 155. Second flow channel groove of inner key; 156. First flow channel groove of inner key; 16. Reversing sleeve; 161. First flow channel groove of reversing sleeve; 162. Second flow channel groove of reversing sleeve; 163. First low-pressure flow channel groove of reversing sleeve; 164. Second low-pressure flow channel groove of reversing sleeve; 165. Reversing compartment; 166. Center hole of reversing sleeve; 167. Bypass hole of reversing sleeve; 17. Lower end cap; 171. First low-pressure flow channel groove of lower end cap; 172. Second low-pressure flow channel groove of lower end cap; 18. Lower nozzle; 19. Sliding sealing ring; 20. Bolt; 21. Slider; 22. Lower connector; 221. Low-pressure flow channel groove of lower connector. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0022] To address any of the shortcomings or deficiencies mentioned in the background technology, this application provides a composite impact drilling speed-up tool that can eliminate ineffective impact output during non-operational states, thereby improving the engineering practicality and operational reliability of the equipment.

[0023] See Figures 1 to 15 As shown in the figure, this application provides a composite impact drilling speed-up tool, including: Sleeve 1; The reciprocating hammer unit includes a hammer body axially slidably connected to a sleeve 1, and an impact hammer 15 rotatably connected to the hammer body. A reversing sleeve 16 is rotatably connected inside the impact hammer 15. A reversing chamber 165 is provided on the reversing sleeve 16. A reversing flow channel hole 121 for conveying drilling fluid to the reversing chamber 165 is provided on the hammer body. The flow channel switching unit includes a retaining ring 9 disposed on the surface of the hammer body, and a transmission mechanism connected between the sleeve 1 and the retaining ring 9. The transmission mechanism is used to convert the axial movement of the retaining ring 9 into rotational movement to open or close the reversing flow channel hole 121.

[0024] The composite impact drilling speed-up tool of this application embodiment cleverly sets up a flow channel switch unit on the existing composite impact drilling speed-up tool, which can close the reversing flow channel hole 121 when the drill string is lifted, eliminate the ineffective impact output in the non-operation state, and improve the engineering practical value and operational reliability of the equipment; when the drill string is pressed down, the reversing flow channel hole 121 is opened to ensure the effective impact output in the operation state and realize the precise action of the impact load when the drill bit contacts the bottom of the well.

[0025] For example, the retaining ring 9 can be configured with notches or holes to allow the rotating retaining ring 9 to expose or cover the reversing flow channel hole 121, that is, to open or close the reversing flow channel hole 121 accordingly; the retaining ring 9 is attached to and rotatably connected to the surface of the upper end cover 12 of the hammer body, and the transmission mechanism includes a rotating guide groove opened on the inner wall of the sleeve 1 and a sliding block fixed on the outer ring of the retaining ring 9 and cooperating with the rotating guide groove, and the rotating guide groove is inclined relative to the axis of the sleeve 1.

[0026] When the composite impact drilling speed-up tool is working normally at the bottom of the well, under the action of drilling pressure, the sliding block connected to the outer ring of the retaining ring 9 is located at the upper end of the rotary guide groove, and the reversing flow channel hole 121 is not blocked. The high-pressure drilling fluid enters the reversing chamber 165 of the reversing sleeve 16 through the reversing flow channel hole 121, realizing the reversal of the high and low pressure difference of the drilling fluid on both sides of the hammer head 151 of the impact hammer 15, generating a high-frequency composite impact load, which is transmitted to the drill bit connected to the lower part, eliminating the "stick-slip" phenomenon of the drill bit at the bottom of the well, while increasing the drill bit depth, improving the mechanical drilling speed and stroke footage.

[0027] When the drill string is lifted, the drill bit is lifted off the bottom of the well. Under the action of gravity, the hammer body drives the retaining ring 9 to move axially downward relative to the sleeve 1. The sliding block connected to the outer ring of the retaining ring 9 slides along the inclined rotary guide groove, thereby realizing the downward movement of the retaining ring 9 while rotating. When the sliding block slides to the lower end of the rotary guide groove and abuts, the retaining ring 9 completely covers the reversing flow channel hole 121 on the upper end cover 12 of the hammer body. The high-pressure drilling fluid cannot flow into the reversing chamber 165 of the reversing sleeve 16, and the high and low pressure difference of the drilling fluid on both sides of the hammer head 151 of the impact hammer 15 cannot be reversed, thus stopping the generation of high-frequency composite impact, avoiding vibration and wear caused by idling, and improving the service life and safety of the tool.

[0028] In some alternative embodiments: see Figures 1 to 6 As shown, this application embodiment provides a composite impact drilling speed-up tool. The retaining ring 9 of the composite impact drilling speed-up tool is provided with a through hole 93 for connecting the reversing flow channel hole 121. The transmission mechanism includes a protrusion 91 connected to the retaining ring 9 and a pressure rod 7 connected to the sleeve 1. The protrusion 91 is provided with an inclined surface 92 that presses against the pressure rod 7.

[0029] The retaining ring 9 of this application embodiment has a through hole 93. The reversing flow channel hole 121 is opened or closed by the alignment or misalignment between the through hole 93 and the reversing flow channel hole 121. The upper surface of the retaining ring 9 is integrally formed with two centrally symmetrical protrusions 91. The protrusions 91 have inclined surfaces 92. At the same time, two radially extending pressure rods 7 are fixed on the sleeve 1 and contact the two inclined surfaces 92. The sleeve 1 has a sleeve mounting hole 102 for mounting the pressure rods 7. The pressure rods 7 are fixed by welding. At the same time, the sleeve 1 is installed with a plug 8 to close the hole.

[0030] When the drill bit connected to the lower connector 22 of the hammer body squeezes the bottom of the well, the hammer body moves upward relative to the sleeve 1, causing the upper end cover 12 of the hammer body to drive the protrusion 91 on the retaining ring 9 to move upward and squeeze the pressure rod 7. The pressure rod 7 slides down relative to the inclined surface 92, causing the protrusion 91 to be squeezed and drive the retaining ring 9 to rotate at a certain angle. After the upper surface of the retaining ring 9 abuts against the pressure rod 7, the through hole 93 on the retaining ring 9 is aligned and connected with the reversing flow channel hole 121 on the upper end cover 12. The high-pressure drilling fluid enters the reversing chamber 165 of the reversing sleeve 16 through the through hole 93 and the reversing flow channel hole 121, realizing the reversal of the high and low pressure difference of the drilling fluid on both sides of the hammer head 151 of the impact hammer 15, generating a high-frequency composite impact load, which is transmitted to the drill bit connected to the lower part, eliminating the "stick-slip" phenomenon of the drill bit at the bottom of the well, while increasing the drill bit depth, improving the mechanical drilling speed and stroke footage.

[0031] In some alternative embodiments: see Figures 1 to 6 As shown in the figure, this application embodiment provides a composite impact drilling speed-up tool. The transmission mechanism of the composite impact drilling speed-up tool also includes a return spring 11 with the retaining ring 9 and the hammer body respectively connected at both ends. The return spring 11 is used to drive the retaining ring 9 to rotate and reset, so that the retaining ring 9 closes the reversing flow channel hole 121.

[0032] In this embodiment, the reset spring 11 is a tension spring. Hooks 10 connecting the ends of the tension spring are fixed on the retaining ring 9 and the upper end cover 12 of the hammer body, respectively. The tension spring can restore its tensile deformation when the drill bit is lifted to drive the retaining ring 9 to rotate and reset, so that the retaining ring 9 blocks the reversing flow channel hole 121.

[0033] Specifically, when the composite impact drilling speed-up tool is working normally at the bottom of the well, under the action of drilling pressure, the sleeve 1 drives the pressure rod 7 to move down, and the pressure rod 7 pushes the inclined surface 92 of the protrusion 91, so that the retaining ring 9 rotates clockwise around the axis of the upper end cover 12. The through hole 93 on the retaining ring 9 is aligned and connected with the reversing flow channel hole 121 of the upper end cover 12. The high-pressure drilling fluid enters the reversing chamber 165 of the reversing sleeve 16 through the through hole 93 and the reversing flow channel hole 121, realizing the reversal of the high and low pressure difference of the drilling fluid on both sides of the hammer head 151 of the impact hammer 15, generating a high-frequency composite impact load, which is transmitted to the drill bit connected to the lower part, eliminating the "stick-slip" phenomenon of the drill bit at the bottom of the well, while increasing the drill bit depth, improving the mechanical drilling speed and stroke footage.

[0034] When the drill string is lifted, the drill bit is lifted off the bottom of the well. The sleeve 1 drives the pressure rod 7 to move upward. Under the action of the tension spring, the inclined surface 92 of the retaining ring 9 and the pressure rod 7 always remain in contact, causing the retaining ring 9 to rotate counterclockwise around the axis of the upper end cover 12 and cover the reversing flow channel hole 121 of the upper end cover 12. The high-pressure drilling fluid cannot flow into the reversing chamber 165 of the reversing sleeve 16, and the high and low pressure difference of the drilling fluid on both sides of the hammer head 151 of the impact hammer 15 cannot be reversed. This will stop the generation of high-frequency composite impact, avoid vibration and wear caused by idling, and improve the service life and safety of the tool.

[0035] In some alternative embodiments: see Figures 1 to 15 As shown in the figure, this application embodiment provides a composite impact drilling speed-up tool. The composite impact drilling speed-up tool has a sliding block 21 and a sliding groove 103 that cooperate with each other between the hammer body and the sleeve 1. The sliding groove 103 extends along the axial direction of the sleeve 1.

[0036] In this embodiment of the application, a slider 21 and a groove 103 are provided between the hammer body and the sleeve 1. The slider 21 and the groove 103 cooperate with each other to limit the axial displacement stroke of the hammer body in the sleeve 1, prevent the hammer body from rotating relative to the sleeve 1, prevent the hammer body from moving down and detaching from the sleeve 1 when it is lifted, and prevent the pressure rod 7 from being excessively squeezed and damaged when the hammer body moves up relative to the sleeve 1.

[0037] For example, in this embodiment, the hammer body includes an upper end cap 12, a hammer sleeve 14, a lower end cap 17, and a lower connector 22, which are fixedly connected in sequence along the axial direction. A slider 21 is fixedly connected to the lower connector 22. A sliding groove 103 extending along the axial direction is provided on the sleeve 1. The slider 21 can be installed by making a hole in the sleeve 1. The slider 21 is inserted into the pre-reserved fixing groove on the lower connector 22 through the hole on the sleeve 1, and then the hole is sealed by a plug. The slider 21 slides in the sliding groove 103, thereby limiting the axial displacement of the hammer body in the sleeve 1. In addition, a sliding sealing ring 19 is provided between the lower connector 22 and the sleeve 1 to ensure sliding sealing.

[0038] When the composite impact drilling speed-up tool is working normally at the bottom of the well, under the action of drilling pressure, the sleeve 1 moves down relative to the hammer body, and the slider 21 on the lower connector 22 abuts against the upper end of the slide groove 103. At this time, the through hole 93 on the retaining ring 9 is aligned and connected with the reversing flow channel hole 121 of the upper end cover 12, ensuring that the composite impact drilling speed-up tool can stably generate high-frequency composite impact.

[0039] When the drill string is lifted, the drill bit is lifted off the bottom of the well. Under the action of gravity, the hammer body drives the slider 21 to move down along the slide groove 103. The slider 21 on the lower connector 22 abuts against the lower end of the slide groove 103 to prevent the hammer body from detaching from the sleeve 1. At this time, the through hole 93 on the retaining ring 9 is misaligned with the reversing flow channel hole 121 of the upper end cover 12. The retaining ring 9 blocks the reversing flow channel hole 121, and the high-pressure drilling fluid cannot flow into the reversing chamber 165 of the reversing sleeve 16. The high and low pressure difference of the drilling fluid on both sides of the hammer head 151 of the impact hammer 15 cannot be reversed, thus stopping the generation of high-frequency composite impact.

[0040] In some alternative embodiments: see Figures 1 to 11 As shown in the embodiment of this application, a composite impact drilling speed-up tool is provided. The hammer body of the composite impact drilling speed-up tool includes an upper end cover 12, a hammer sleeve 14, a lower end cover 17 and a lower connector 22 that are fixedly connected in sequence along the axial direction. The impact hammer 15 is located inside the hammer sleeve 14. The reversing flow channel hole 121 is located on the upper end cover 12. The retaining ring 9 is in contact with the surface of the upper end cover 12 and is rotatably connected. The upper end cover 12 is sleeved on the reversing sleeve 16, and the lower end cover 17 is connected to the reversing sleeve 16.

[0041] The hammer body of this application embodiment includes an upper end cover 12, a hammer sleeve 14, a lower end cover 17, and a lower connector 22, which are fixedly connected in sequence along the axial direction. Specifically, the upper surface of the upper end cover 12 is provided with a bolt countersunk hole 122 for mounting bolts 20. The bolts 20 pass through the upper end cover 12, the hammer sleeve 14, and the lower end cover 17 in sequence, and are connected to the lower connector 22, thereby connecting the upper end cover 12, the hammer sleeve 14, the lower end cover 17, and the lower connector 22 into a whole.

[0042] The reversing flow channel hole 121 is opened on the upper end cover 12. There are four reversing flow channel holes 121 and four bolt countersunk holes 122, which are distributed circumferentially. The upper end cover 12 has an annular boss 123 that connects to its central hole. The retaining ring 9 is sleeved on the annular boss 123. In order to achieve the fit and rotatable connection between the retaining ring 9 and the surface of the upper end cover 12, a Z-shaped pressure block 13 for axially limiting the retaining ring 9 is installed on the upper end cover 12 by screws.

[0043] In some alternative embodiments: see Figures 1 to 15As shown, this application embodiment provides a composite impact drilling speed-up tool. The upper end cover 12 of the composite impact drilling speed-up tool is fixedly equipped with a stationary valve 6 sleeved on the outside of the reversing sleeve 16. The stationary valve 6 is rotatably connected to a moving valve 3 fixedly connected to the reversing sleeve 16. The stationary valve 6 is fixedly equipped with a valve cover 2 for axially limiting the moving valve 3. The center hole of the moving valve 3 communicates with the reversing sleeve 16. The moving valve 3 is provided with a first arc-shaped flow channel groove 31, the stationary valve 6 is provided with a second arc-shaped flow channel groove 61 that matches the first arc-shaped flow channel groove 31, the reversing sleeve 16 is provided with a reversing sleeve bypass hole 167, and the stationary valve 6 is provided with a stationary valve bypass hole 64 that matches the reversing sleeve bypass hole 167.

[0044] In this embodiment, the moving valve 3 has integrally formed raised keys 33 symmetrically arranged around the central hole 34 of the moving valve. The moving valve 3 is keyed to the top of the reversing sleeve 16 via the raised keys 33. The moving valve 3 is rotatably connected inside the stationary valve 6. An annular valve cover 2 is installed on the stationary valve 6 by screws to prevent the moving valve 3 from detaching. In addition, the moving valve 3 is provided with a first ball groove 32, and the stationary valve 6 is provided with a second ball groove 62 surrounding the central hole 63 of the stationary valve. Circumferentially distributed balls 5 are installed between the first ball groove 32 and the second ball groove 62 to reduce rotational friction.

[0045] The moving valve 3 has a symmetrically arranged first arc-shaped flow channel groove 31, the stationary valve 6 has a symmetrically arranged second arc-shaped flow channel groove 61, the reversing sleeve 16 has a symmetrically arranged reversing sleeve bypass hole 167, and the stationary valve 6 has a symmetrically arranged stationary valve bypass hole 64.

[0046] The reversing sleeve 16 drives the moving valve 3 to rotate synchronously via the keyway. The axial flow area formed by the first arc-shaped flow channel groove 31 on the moving valve 3 and the second arc-shaped flow channel groove 61 on the stationary valve 6, as well as the axial flow area formed by the reversing sleeve bypass hole 167 and the stationary valve bypass hole 64, all change accordingly. This generates drilling fluid hydraulic pulse pressure, forming an axial impact force, which is transmitted to the drill bit through the moving valve 3, stationary valve 6, upper end cover 12, hammer sleeve 14, lower end cover 17 and lower connector 22.

[0047] In some alternative embodiments: see Figures 1 to 15 As shown, this application embodiment provides a composite impact drilling speed-up tool. The impact hammer 15 of the composite impact drilling speed-up tool has a ring structure. Hammer heads 151 are symmetrically arranged on the outer ring surface of the impact hammer 15, and hammer head first flow channel grooves 153 and hammer head second flow channel grooves 154 are respectively located on both sides of the hammer head 151. Inner keys 152 located in the reversing chamber 165 are symmetrically arranged on the inner ring surface of the impact hammer 15, and inner key first flow channel grooves 156 and inner key second flow channel grooves 155 are respectively located on both sides of the inner key 152.

[0048] The impact hammer 15 of this embodiment has an integrally formed hammer head 151 and inner key 152. The hammer head 151 and inner key 152 respectively cooperate with the impact chamber 144 on the hammer sleeve 14 and the reversing chamber 165 on the reversing sleeve 16. The hammer head 151 has a first flow channel groove 153 and a second flow channel groove 154 on both sides, which can realize the introduction or export of drilling fluid into or out of the impact chamber 144. The inner key 152 has a first flow channel groove 156 and a second flow channel groove 155 on both sides, which can realize the introduction or export of drilling fluid into or out of the reversing chamber 165.

[0049] In some alternative embodiments: see Figures 1 to 15 As shown in the figure, this application embodiment provides a composite percussion drilling speed-up tool. The reversing sleeve 16 of the composite percussion drilling speed-up tool is provided with an upper nozzle 4, and the lower end cover 17 is provided with a lower nozzle 18 communicating with the reversing sleeve 16. The reversing chambers 165 are symmetrically arranged. The reversing chambers 165 are provided with a first flow channel groove 161 and a second flow channel groove 162 located between the two reversing chambers 165. The reversing sleeve 16 is also symmetrically provided with a first low-pressure flow channel groove 163 and a second low-pressure flow channel groove 164.

[0050] In this embodiment, the upper nozzle 4 and the lower nozzle 18 cooperate with each other. The drilling fluid flows through the central hole 101 of the sleeve, the upper nozzle 4, the central hole 166 of the reversing sleeve, and the lower nozzle 18, and can be pressurized at the lower nozzle 18 to form a high-pressure zone for the drilling fluid. The reversing sleeve 16 is provided with a first flow channel groove 161 and a second flow channel groove 162, as well as a first low-pressure flow channel groove 163 and a second low-pressure flow channel groove 164. The first flow channel groove 161 and the second flow channel groove 162 are respectively used to connect with the first flow channel groove 153 and the second flow channel groove 154 of the hammer head, and the first low-pressure flow channel groove 163 and the second low-pressure flow channel groove 164 of the reversing sleeve are respectively used to connect with the first flow channel groove 153 and the second flow channel groove 154 of the hammer head.

[0051] In some alternative embodiments: see Figures 1 to 15 As shown, this application embodiment provides a composite impact drilling speed-up tool. The hammer sleeve 14 of the composite impact drilling speed-up tool is symmetrically provided with an impact chamber 144 for accommodating a hammer head 151, and a first reversing flow channel groove 141 and a second reversing flow channel groove 142 located between the two impact chambers 144 and communicating with the reversing flow channel hole 121. The hammer sleeve 14 is also symmetrically provided with a low-pressure flow channel groove 143.

[0052] The hammer sleeve 14 of this application embodiment is provided with a first reversing flow channel groove 141 and a second reversing flow channel groove 142. The first reversing flow channel groove 141 is used to connect with the first flow channel groove 156 of the inner key, and the second reversing flow channel groove 142 is used to connect with the second flow channel groove 155 of the inner key. The hammer sleeve 14 is also symmetrically provided with a low-pressure flow channel groove 143, which is used to connect with the first flow channel groove 156 or the second flow channel groove 155 of the inner key.

[0053] In some alternative embodiments: see Figures 1 to 15 As shown in the embodiment of this application, a composite impact drilling speed-up tool is provided. The lower end cover 17 of the composite impact drilling speed-up tool is provided with a lower end cover first low-pressure flow channel groove 171 that communicates with the hammer sleeve low-pressure flow channel groove 143, and two lower end cover second low-pressure flow channel grooves 172 that communicate with the reversing sleeve first low-pressure flow channel groove 163 and the reversing sleeve second low-pressure flow channel groove 164, respectively. The lower connector 22 is provided with a lower connector low-pressure flow channel groove 221 that communicates with the lower end cover first low-pressure flow channel groove 171, and the lower end cover second low-pressure flow channel grooves 172 communicate with the center hole of the lower connector 22.

[0054] In this embodiment, the first low-pressure flow channel 171 of the lower end cover connects the low-pressure flow channel 143 of the hammer sleeve and the low-pressure flow channel 221 of the lower connector, allowing the drilling fluid of the reversing chamber 165 to be smoothly discharged into the central hole of the lower connector 22; the two second low-pressure flow channel channels 172 of the lower end cover are respectively connected to the first low-pressure flow channel 163 and the second low-pressure flow channel 164 of the reversing sleeve, allowing the drilling fluid of the impact chamber 144 to be smoothly discharged into the central hole of the lower connector 22.

[0055] Specifically, the working process of the composite impact drilling speed-up tool in this application embodiment is as follows: When the composite impact drilling speed-up tool is working at the bottom of the well, its upper end is connected to other drilling tools, its lower end is connected to the drill bit, and it transmits drilling pressure and torque downward through the sleeve 1.

[0056] like Figure 1 As shown, the drill string is lowered from the wellhead to the bottom of the well. During the process from the moment the drill bit contacts the bottom of the well until the drilling pressure stabilizes, the sleeve 1 moves the pressure rod 7 downward. The pressure rod 7 presses down on the inclined surface 92 on the retaining ring 9, causing the retaining ring 9 to rotate clockwise. The through hole 93 on the retaining ring 9 aligns and connects with the reversing flow channel hole 121 of the upper end cover 12. The slider 21 on the lower connector 22 is located at the upper end of the sliding groove 103 of the sleeve 1. The drilling fluid flows through the central hole 101 of the sleeve, the upper nozzle 4, the central hole 166 of the reversing sleeve, and the lower nozzle 18, and is pressurized at the lower nozzle 18, forming a high-pressure zone for the drilling fluid.

[0057] like Figure 13As shown, a portion of the high-pressure drilling fluid enters one side of the hammer 151 through the first flow channel 161 of the reversing sleeve and the first flow channel 153 of the hammer head, applying high pressure to that side. The other side of the hammer 151 connects to the low-pressure area at the tool outlet through the second flow channel 154 of the hammer head and the second low-pressure flow channel 164 of the reversing sleeve. Therefore, under the combined high and low pressure of the drilling fluid on both sides, the hammer 151 rotates clockwise at high speed around the tool axis, while simultaneously driving the reversing sleeve 16 to rotate synchronously via the inner key 152.

[0058] When the hammer 151 strikes the impact chamber 144 clockwise, it generates an impact torque that is transmitted to the lower drill bit, thereby eliminating the "stick-slip" phenomenon of the drill bit, reducing the wear of the drill bit composite plates, and improving the mechanical drilling speed and stroke. Figure 14 As shown, at the instant the hammer 151 strikes the impact chamber 144 clockwise, some of the high-pressure drilling fluid enters the gap between the reversing chamber 165 and the inner key 152 through the through hole 93 on the retaining ring 9, the reversing flow channel hole 121 of the upper end cover 12, the hammer sleeve second reversing flow channel groove 142, and the inner key second flow channel groove 155. At the same time, on the other side of the reversing chamber 165 that is not in contact with the inner key 152, the fluid communicates with the low pressure at the tool outlet through the inner key first flow channel groove 156, the hammer sleeve low-pressure flow channel groove 143, and the lower connector low-pressure flow channel groove 221, forming a low-pressure zone.

[0059] like Figure 15 As shown, after the hammer 151 impacts the impact chamber 144, the reversing sleeve 16 continues to rotate clockwise until the inner key 152 contacts the other side of the reversing chamber 165. This completes the high-low pressure reversal of the drilling fluid on both sides of the hammer 151. After the high-low pressure reversal on both sides of the hammer 151, the impact hammer 15 begins to rotate counterclockwise around the tool axis to impact again, achieving the high-low pressure reversal on both sides of the hammer 151 once more. This cycle repeats continuously, generating high-frequency circumferential impacts as the high-pressure drilling fluid continuously flows through the tool.

[0060] During the above process, the reversing sleeve 16 has the working characteristic of self-excited reciprocating rotation. The reversing sleeve 16 drives the moving valve 3 to rotate periodically through the cooperation of the keyway at the top and the protruding key 33 at the bottom of the moving valve 3. During the high-frequency reciprocating rotation of the moving valve 3, the effective flow area of ​​the first arc-shaped flow channel groove 31 on the moving valve 3 and the second arc-shaped flow channel groove 61 on the stationary valve 6 changes periodically, forming hydraulic pressure pulses and generating periodic axial impact loads. These loads are transmitted to the drill bit through the moving valve 3, ball bearing 5, stationary valve 6, upper end cover 12, hammer sleeve 14, lower end cover 17, and lower connector 22, forming a composite impact load with circumferential and axial forces.

[0061] See Figure 14As shown, when the drill string is lifted and drilling fluid is maintained, the drill bit leaves the bottom of the well. Under the action of gravity and hydraulic pressure, all parts from the valve cover 2 to the lower connector 22 inside the tool sleeve 1 and the drill bit as a whole move downwards, while the sleeve 1, pressure rod 7, and plug 8 move upwards relative to the retaining ring 9. At this time, under the action of the return spring 11, the retaining ring 9 rotates counterclockwise, blocking the four reversing flow channel holes 121 on the upper end cover 12. The high-pressure drilling fluid cannot enter the reversing chamber 165 through the through hole 93 on the retaining ring 9, the reversing flow channel holes 121 on the upper end cover 12, the second reversing flow channel groove 142 of the hammer sleeve, and the second flow channel groove 155 of the inner key. After the hammer 151 impacts the impact chamber 144, the reversing sleeve 16 cannot continue to rotate, and the high and low pressure difference of the drilling fluid on both sides of the hammer 151 cannot be reversed, and the tool stops generating high-frequency circumferential impact. Since the reversing sleeve 16 stops reciprocating, it cannot drive the valve 3 to reciprocate, and it will also stop generating high-frequency axial impact. That is, after the drill bit is lifted from the bottom of the well, the tool immediately stops high-frequency compound impact to avoid vibration and wear caused by idling, thereby improving the tool's service life and safety.

[0062] In the description of this application, it should be noted that the terms "upper," "lower," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Unless otherwise expressly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication between two elements. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0063] It should be noted that in this application, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0064] The above description is merely a specific embodiment of this application, enabling those skilled in the art to understand or implement this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A composite impact drilling speed-up tool, characterized in that, include: Sleeve (1); The reciprocating hammer unit includes a hammer body axially slidably connected to the sleeve (1) and an impact hammer (15) rotatably connected to the hammer body. A reversing sleeve (16) is rotatably connected inside the impact hammer (15). A reversing chamber (165) is provided on the reversing sleeve (16). A reversing flow channel hole (121) for conveying drilling fluid to the reversing chamber (165) is provided on the hammer body. The flow channel switching unit includes a retaining ring (9) disposed on the surface of the hammer body, and a transmission mechanism connected between the sleeve (1) and the retaining ring (9). The transmission mechanism is used to convert the axial movement of the retaining ring (9) into rotational movement to open or close the reversing flow channel hole (121).

2. The composite impact drilling speed-up tool as described in claim 1, characterized in that: The retaining ring (9) is provided with a through hole (93) for connecting the reversing flow channel hole (121). The transmission mechanism includes a protrusion (91) connected to the retaining ring (9) and a pressure rod (7) connected to the sleeve (1). The protrusion (91) is provided with an inclined surface (92) that presses against the pressure rod (7).

3. The composite impact drilling speed-up tool as described in claim 2, characterized in that: The transmission mechanism also includes a return spring (11) that is connected to the retaining ring (9) and the hammer body at both ends respectively. The return spring (11) is used to drive the retaining ring (9) to rotate and reset so that the retaining ring (9) closes the reversing flow channel hole (121).

4. The composite impact drilling speed-up tool as described in claim 1 or 3, characterized in that: A sliding block (21) and a sliding groove (103) are provided between the hammer body and the sleeve (1), and the sliding groove (103) extends along the axial direction of the sleeve (1).

5. The composite impact drilling speed-up tool as described in claim 1 or 3, characterized in that: The hammer body includes an upper end cover (12), a hammer sleeve (14), a lower end cover (17), and a lower connector (22) that are fixedly connected in sequence along the axial direction. The impact hammer (15) is located inside the hammer sleeve (14). The reversing flow channel hole (121) is located on the upper end cover (12). The retaining ring (9) is in contact with the surface of the upper end cover (12) and is rotatably connected. The upper end cover (12) is sleeved on the reversing sleeve (16). The lower end cover (17) is connected to the reversing sleeve (16).

6. The composite impact drilling speed-up tool as described in claim 5, characterized in that: A stationary valve (6) is fixed on the upper end cover (12) and sleeved on the outside of the reversing sleeve (16). A moving valve (3) is rotatably connected inside the stationary valve (6) and fixedly connected to the reversing sleeve (16). A valve cover (2) is fixed on the stationary valve (6) to axially limit the moving valve (3). The center hole of the moving valve (3) is connected to the reversing sleeve (16). The moving valve (3) is provided with a first arc-shaped flow channel groove (31), the stationary valve (6) is provided with a second arc-shaped flow channel groove (61) that matches the first arc-shaped flow channel groove (31), the reversing sleeve (16) is provided with a reversing sleeve bypass hole (167), and the stationary valve (6) is provided with a stationary valve bypass hole (64) that matches the reversing sleeve bypass hole (167).

7. The composite impact drilling speed-up tool as described in claim 5, characterized in that: The impact hammer (15) has a ring structure. Hammer heads (151) are symmetrically arranged on the outer ring surface of the impact hammer (15), and hammer head first flow channel groove (153) and hammer head second flow channel groove (154) are respectively located on both sides of the hammer head (151). The inner ring surface of the impact hammer (15) is symmetrically provided with an inner key (152) located in the reversing chamber (165), and an inner key first flow channel groove (156) and an inner key second flow channel groove (155) located on both sides of the inner key (152).

8. The composite impact drilling speed-up tool as described in claim 7, characterized in that: The reversing sleeve (16) is provided with an upper nozzle (4), and the lower end cover (17) is provided with a lower nozzle (18) communicating with the reversing sleeve (16). The reversing chamber (165) is symmetrically arranged. The reversing chamber (165) is provided with a first flow channel groove (161) and a second flow channel groove (162) of the reversing sleeve located between the two reversing chambers (165). The reversing sleeve (16) is also symmetrically provided with a first low-pressure flow channel groove (163) and a second low-pressure flow channel groove (164).

9. The composite impact drilling speed-up tool as described in claim 8, characterized in that: The hammer sleeve (14) is symmetrically provided with an impact chamber (144) for accommodating the hammer head (151), and a first reversing flow channel groove (141) and a second reversing flow channel groove (142) located between the two impact chambers (144) and communicating with the reversing flow channel hole (121). The hammer sleeve (14) is also symmetrically provided with a low-pressure flow channel groove (143).

10. The composite impact drilling speed-up tool as described in claim 9, characterized in that: The lower end cover (17) is provided with a first low pressure flow channel (171) of the lower end cover that communicates with the low pressure flow channel (143) of the hammer sleeve, and two second low pressure flow channel channels (172) of the lower end cover that communicate with the first low pressure flow channel (163) of the reversing sleeve and the second low pressure flow channel (164) of the reversing sleeve respectively. The lower connector (22) is provided with a lower connector low pressure channel groove (221) that connects to the first low pressure channel groove (171) of the lower end cover, and the second low pressure channel groove (172) of the lower end cover is connected to the center hole of the lower connector (22).

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