A circumferential impact drilling speed-up tool with anti-idling function

Abstract

This application relates to a circumferential impact drilling speed-up tool with anti-idling function, belonging to the field of drilling tool technology. It includes a sleeve; a reciprocating hammer unit comprising 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 provided on the reversing sleeve. The hammer body has a reversing flow channel hole; and a flow channel switching unit comprising a stop block slidably connected to the surface of the hammer body, and a transmission mechanism connected between the sleeve and the stop block, used to convert the axial movement of the stop block into radial movement to open or close the reversing flow channel hole. When the drill string is lifted, the axial movement of the stop block can be converted into radial movement, causing the stop block to slide radially along the surface of the hammer body while displacing axially with the hammer body, blocking the reversing flow channel hole. High-pressure drilling fluid cannot flow into the reversing chamber, thereby stopping the generation of high-frequency circumferential impact, avoiding vibration and wear caused by idling, and improving the tool's service life and safety.

Description

Technical Field

[0001] This application relates to the field of drilling tool technology, and in particular to a circumferential impact drilling speed-up tool with anti-idling function. 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:

[0004] 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.

[0005] 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

[0006] To address any of the shortcomings or deficiencies mentioned in the background technology, this application provides a circumferential impact drilling speed-up tool with anti-idling function, which can eliminate ineffective impact output in non-operational states and improve the engineering practical value and operational reliability of the equipment.

[0007] This application provides a circumferential impact drilling speed-up tool with anti-idling function, including:

[0008] Sleeve;

[0009] 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.

[0010] The flow channel switching unit includes a stop block slidably connected to the surface of the hammer body, and a transmission mechanism connected between the sleeve and the stop block. The transmission mechanism is used to convert the axial movement of the stop block into radial movement to open or close the reversing flow channel hole.

[0011] In some embodiments, the transmission mechanism includes a push block fixed inside the sleeve and located above the hammer body, the push block having a first inclined surface facing the stop block, and the stop block having a second inclined surface slidably connected to the first inclined surface.

[0012] In some embodiments, the number of stops is two and they are symmetrically arranged, the number of first inclined surfaces is two and they are located between the two stops, and the transmission mechanism further includes an elastic element connecting the two stops, the elastic element being used to radially tighten the two stops so that the first inclined surface and the second inclined surface remain in contact.

[0013] In some embodiments, two first inclined surfaces are disposed on the same push block, and the push block is provided with a central hole connecting the sleeve and the reversing sleeve; guide blocks are symmetrically disposed on the hammer body in the radial direction, and the stop block is slidably connected to the upper surface of the hammer body through the guide blocks.

[0014] 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.

[0015] 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 stop block is slidably connected to the surface of the upper end cover. The central holes of the upper end cover and the lower end cover are respectively connected to the two ends of the reversing sleeve.

[0016] In some embodiments, the impact hammer has a ring structure, and hammer heads are symmetrically arranged on the outer ring surface of the impact hammer, as well as a first flow channel groove and a second flow channel groove on the hammer head located on both sides of the hammer head respectively.

[0017] The inner ring surface of the impact hammer is symmetrically provided with an inner key located in the reversing chamber, and an inner key first flow channel groove and an inner key second flow channel groove located on both sides of the inner key.

[0018] In some embodiments, a nozzle is provided in the central hole of the lower end cover, the reversing chambers are symmetrically arranged, and the reversing chambers are provided with a first flow channel groove and a second flow channel groove of the reversing sleeve located between the two reversing chambers. The reversing sleeve is also symmetrically provided with a first low-pressure flow channel groove and a second low-pressure flow channel groove of the reversing sleeve.

[0019] 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.

[0020] 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.

[0021] 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.

[0022] The beneficial effects of the technical solution provided in this application include:

[0023] This application provides a circumferential impact drilling speed-up tool with anti-dry-spinning function. Its sleeve contains a reciprocating hammer unit and a flow channel switching unit. 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 provided on the reversing sleeve. The hammer body has a reversing flow channel hole for supplying drilling fluid to the reversing chamber. The flow channel switching unit includes a stop block slidably connected to the surface of the hammer body, and a transmission mechanism connected between the sleeve and the stop block. The transmission mechanism converts the axial movement of the stop block into radial movement to open or close the reversing flow channel hole.

[0024] 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 stop block moves axially with the hammer body. The transmission mechanism converts the axial movement of the stop block into radial movement, so that while the stop block moves axially with the hammer body, it slides radially along the surface of the hammer body, thereby blocking the reversing flow channel hole. The high-pressure drilling fluid cannot flow into the reversing chamber of the reversing sleeve, and the impact hammer cannot use the high and low pressure difference of the drilling fluid to reverse the direction. This stops the generation of high-frequency circumferential impact, avoids vibration and wear caused by idling, and improves the service life and safety of the tool. Attached Figure Description

[0025] 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.

[0026] Figure 1 This is a schematic diagram of the speed-up tool according to an embodiment of this application;

[0027] Figure 2 This is a schematic diagram of the transmission mechanism according to an embodiment of this application;

[0028] Figure 3 This is a schematic diagram of the push block structure according to an embodiment of this application;

[0029] Figure 4 This is a schematic diagram of the structure of the stop block according to an embodiment of this application;

[0030] Figure 5 This is a schematic diagram of the guide block structure according to an embodiment of this application;

[0031] Figure 6 This is a schematic diagram of the upper end cover in an embodiment of this application;

[0032] Figure 7 This is a schematic diagram of the hammer sleeve according to an embodiment of this application;

[0033] Figure 8 This is a schematic diagram of the impact hammer according to an embodiment of this application;

[0034] Figure 9 This is a schematic diagram of the reversing sleeve according to an embodiment of this application;

[0035] Figure 10 This is a schematic diagram of the structure of the lower end cover according to an embodiment of this application;

[0036] Figure 11 for Figure 1 Top view of the cross section at point AA (reversing flow channel opening);

[0037] Figure 12 for Figure 1 Top view of the cross-section at point BB;

[0038] Figure 13 This is a schematic diagram of the hammer impact chamber according to an embodiment of this application;

[0039] Figure 14 This is a structural schematic diagram of the internal key impact reversing chamber according to an embodiment of this application;

[0040] Figure 15This is a schematic diagram of the structure of the block closing the reversing flow channel hole in an embodiment of this application.

[0041] The following is a list of components represented by each label in the attached diagram:

[0042] 1. Sleeve; 101. Slide groove; 2. Push block; 21. First inclined surface; 3. Stop block; 31. Second inclined surface; 32. Second mounting groove; 33. Side of stop block; 34. Mounting hole; 4. Hook; 5. Elastic element; 6. Guide block;

[0043] 7. Top cover; 71. Reversing flow channel hole; 72. First mounting groove; 73. Bolt countersunk hole;

[0044] 8. Hammer sleeve; 81. First reversing flow channel groove of hammer sleeve; 82. Second reversing flow channel groove of hammer sleeve; 83. Low-pressure flow channel groove of hammer sleeve; 84. Impact chamber;

[0045] 9. Impact hammer; 91. Hammer head; 92. Inner key; 93. First flow channel groove of hammer head; 94. Second flow channel groove of hammer head; 95. Second flow channel groove of inner key; 96. First flow channel groove of inner key;

[0046] 10. Reversing sleeve; 103. First flow channel groove of reversing sleeve; 104. Second flow channel groove of reversing sleeve; 105. First low-pressure flow channel groove of reversing sleeve; 106. Second low-pressure flow channel groove of reversing sleeve; 107. Reversing compartment;

[0047] 11. Lower end cover; 111. First low-pressure flow channel groove of lower end cover; 112. Second low-pressure flow channel groove of lower end cover;

[0048] 12. Nozzle; 13. Sliding seal ring; 14. Plug; 15. Slider; 16. Lower connector; 161. Lower connector low-pressure flow channel groove; 17. Bolt. Detailed Implementation

[0049] 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.

[0050] To address any of the shortcomings or deficiencies mentioned in the background technology, this application provides a circumferential impact drilling speed-up tool with anti-idling function, which can eliminate ineffective impact output in non-operational states and improve the engineering practical value and operational reliability of the equipment.

[0051] See Figures 1 to 15As shown in the figure, this application embodiment provides a circumferential impact drilling speed-up tool with anti-idling function, including:

[0052] Sleeve 1;

[0053] The reciprocating hammer unit includes a hammer body axially slidably connected to a sleeve 1, and an impact hammer 9 rotatably connected to the hammer body. A reversing sleeve 10 is rotatably connected inside the impact hammer 9. A reversing chamber 107 is provided on the reversing sleeve 10. A reversing flow channel hole 71 for conveying drilling fluid to the reversing chamber 107 is provided on the hammer body.

[0054] The flow channel switching unit includes a stop 3 slidably connected to the surface of the hammer body, and a transmission mechanism connected between the sleeve 1 and the stop 3. The transmission mechanism is used to convert the axial movement of the stop 3 into radial movement to open or close the reversing flow channel hole 71.

[0055] The circumferential impact drilling speed-up tool with anti-dry-spinning function in this application embodiment cleverly sets up a flow channel switch unit on the existing impact drilling speed-up tool. This allows the reversing flow channel hole 71 to be closed when the drill string is lifted, eliminating ineffective impact output in non-operational state and improving the engineering practical value and operational reliability of the equipment; and the reversing flow channel hole 71 to be opened when the drill string is pressed down, ensuring effective impact output in operation and achieving precise action of impact load when the drill bit contacts the bottom of the well.

[0056] For example, the stop block 3 slides radially along the surface of the upper end cover 7 of the hammer body, which can expose or cover the reversing flow channel hole 71, that is, open or close the reversing flow channel hole 71 accordingly; the stop block 3 is in contact with the surface of the upper end cover 7 of the hammer body, and a T-shaped slide rail that cooperates with the stop block 3 is fixed on the upper end cover 7 to realize the sliding connection between the stop block 3 and the upper end cover 7. The transmission mechanism is an inclined guide post fixedly connected to the inner side wall of the sleeve 1. The end of the inclined guide post away from the inner side wall of the sleeve 1 is inclined towards the upper end cover 7 of the hammer body and passes through the stop block 3.

[0057] When the circumferential 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 inclined guide column to move down, so that the stop block 3 moves outward in a straight line along the inclined guide column and moves away from the axis of the sleeve 1, exposing the reversing flow channel hole 71 of the upper end cover 7. The drilling fluid flows into the reversing chamber 107 of the reversing sleeve 10, realizing the conversion of the high and low pressure difference of the drilling fluid on both sides of the hammer head 91 of the impact hammer 9, generating a high-frequency reciprocating circumferential impact torque, which is transmitted to the drill bit connected to the lower part, eliminating the harmful "stick-slip" phenomenon of the drill bit, reducing the wear of the drill bit composite plate, and improving the mechanical drilling speed and stroke footage.

[0058] When the drilling fluid is circulated while the drill string is being lifted, the drill bit is lifted off the bottom of the well. The sleeve 1 moves the inclined guide column upward. Under the action of gravity and hydraulic pressure, the hammer body moves the stop block 3 downward relative to the sleeve 1, causing the stop block 3 to move in a straight line along the inclined guide column and approach the axis of the sleeve 1. The stop block 3 blocks the reversing flow channel hole 71 of the upper end cover 7, preventing the high-pressure drilling fluid from flowing into the reversing chamber 107 of the reversing sleeve 10. This prevents the reversal of the high and low pressure difference of the drilling fluid on both sides of the hammer head 91 of the impact hammer 9, thereby stopping the generation of high-frequency reciprocating circumferential impact, avoiding vibration and wear caused by idling, and improving the service life and safety of the tool.

[0059] In some alternative embodiments: see Figures 1 to 6 As shown, this application embodiment provides a circumferential impact drilling speed-up tool with anti-dry-spinning function. The transmission mechanism of the circumferential impact drilling speed-up tool with anti-dry-spinning function includes a push block 2 fixed inside the sleeve 1 and located above the hammer body. The push block 2 is provided with a first inclined surface 21 facing the stop block 3. The stop block 3 is provided with a second inclined surface 31 that is slidably connected to the first inclined surface 21.

[0060] In this embodiment of the application, a push block 2 is fixedly connected inside the sleeve 1. The push block 2 is provided with a first inclined surface 21, and the stop block 3 is provided with a second inclined surface 31 that is slidably connected to the first inclined surface 21. When the upper end cover 7 of the hammer body drives the stop block 3 to move upward along the axial direction of the sleeve 1 and approach the push block 2, the first inclined surface 21 of the push block 2 and the second inclined surface 31 of the stop block 3 press against each other, so that the stop block 3 moves upward along the axial direction of the upper end cover 7 and slides radially along the surface of the upper end cover 7, thereby exposing the reversing flow channel hole 71.

[0061] For example, the bottom end of the stop block 3 is integrally formed with a first inverted T-shaped block extending into the interior of the upper end cover 7 and slidably connected to the upper end cover 7. The surface of the upper end cover 7 is provided with a first inverted T-shaped groove that matches the first inverted T-shaped block, so that the bottom end of the stop block 3 is attached to and slidably connected to the surface of the upper end cover 7, while preventing the stop block 3 from detaching from the surface of the upper end cover 7.

[0062] Meanwhile, a second inverted T-shaped block is integrally formed on the second inclined surface 31 of the stop block 3, extending into the interior of the push block 2 and slidably connected to the push block 2. The surface of the push block 2 is provided with a second inverted T-shaped groove that matches the second inverted T-shaped block, so that the second inclined surface 31 of the stop block 3 and the first inclined surface 21 of the push block 2 can be attached and slidably connected, while preventing the second inclined surface 31 of the stop block 3 from separating from the first inclined surface 21 of the push block 2.

[0063] When the circumferential 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 push block 2 to move down. The first inclined surface 21 of the push block 2 squeezes the second inclined surface 31 of the stop block 3, causing the stop block 3 to move outward in a straight line along the radial direction of the upper end cover 7, exposing the reversing flow channel hole 71 of the upper end cover 7. The drilling fluid flows into the reversing chamber 107 of the reversing sleeve 10, realizing the conversion of the high and low pressure difference of the drilling fluid on both sides of the hammer head 91 of the impact hammer 9, generating a high-frequency reciprocating circumferential impact torque, which is transmitted to the drill bit connected to the lower part, eliminating the harmful "stick-slip" phenomenon of the drill bit, reducing the wear of the drill bit composite plate, and improving the mechanical drilling speed and stroke footage.

[0064] When the drilling fluid is circulated while the drill string is being lifted, the drill bit is lifted off the bottom of the well. The sleeve 1 drives the push block 2 to move upward. Under the action of gravity and hydraulic pressure, the upper end cover 7 of the hammer body drives the stop block 3 to move downward relative to the sleeve 1. The stop block 3 slides down along the first inclined surface 21 of the push block 2, so that the stop block 3 moves in a straight line in the radial direction of the upper end cover 7, blocking the reversing flow channel hole 71 of the upper end cover 7. The high-pressure drilling fluid cannot flow into the reversing chamber 107 of the reversing sleeve 10, and the high and low pressure difference of the drilling fluid on both sides of the hammer head 91 of the impact hammer 9 cannot be reversed, thereby stopping the generation of high-frequency reciprocating circumferential impact, avoiding vibration and wear caused by idling, and improving the service life and safety of the tool.

[0065] In some alternative embodiments: see Figures 1 to 6 As shown, this application embodiment provides a circumferential impact drilling speed-up tool with anti-free spin function. The circumferential impact drilling speed-up tool with anti-free spin function has two stops 3 arranged symmetrically, and two first inclined surfaces 21 located between the two stops 3. The transmission mechanism also includes an elastic element 5 connecting the two stops 3. The elastic element 5 is used to radially tighten the two stops 3 so that the first inclined surface 21 and the second inclined surface 31 remain in contact.

[0066] In this embodiment, there are two stop blocks 3 arranged symmetrically. There are two first inclined surfaces 21 located between the two stop blocks 3 and slidingly engaged with the two second inclined surfaces 31 respectively. An elastic element 5 is connected between the two stop blocks 3. When the two first inclined surfaces 21 simultaneously press the two second inclined surfaces 31, the two stop blocks 3 move away from each other to expose the reversing flow channel hole 71 of the upper end cover 7. At the same time, the elastic element 5 undergoes tensile deformation. When the drill bit is lifted, the elastic element 5 restores its tensile deformation to drive the two stop blocks 3 to move closer to each other, so that the stop blocks 3 are reset and block the reversing flow channel hole 71.

[0067] For example, in this embodiment, the side 33 of the stop block has a mounting hole 34, and a hook 4 is threaded into the mounting hole 34. The elastic element 5 is a tension spring and is connected to the hook 4 on both sides of the stop block 3. To improve stability, hooks 4 and tension springs are installed on both sides of the stop block 3.

[0068] When the circumferential 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 push block 2 to move down, and the two first inclined surfaces 21 respectively push the second inclined surfaces 31 on the two stop blocks 3, so that the stop blocks 3 move outward in a straight line along the radial direction of the upper end cover 7, exposing the reversing flow channel hole 71 of the upper end cover 7. The drilling fluid flows into the reversing chamber 107 of the reversing sleeve 10, realizing the conversion of the high and low pressure difference of the drilling fluid on both sides of the hammer head 91 of the impact hammer 9, generating a high-frequency reciprocating circumferential impact torque, which is transmitted to the drill bit connected to the lower part, eliminating the harmful "stick-slip" phenomenon of the drill bit, reducing the wear of the drill bit composite plate, and improving the mechanical drilling speed and stroke footage.

[0069] When the drilling fluid is circulated while the drill string is being lifted, the drill bit is lifted off the bottom of the well. The sleeve 1 drives the push block 2 to move upward. Under the action of the tension spring, the second inclined surface 31 of the stop block 3 and the first inclined surface 21 of the push block 2 remain in contact, causing the stop block 3 to move in a straight line in the radial direction of the end cover and block the reversing flow channel hole 71 of the upper end cover 7. The high-pressure drilling fluid cannot flow into the reversing chamber 107 of the reversing sleeve 10, and the high and low pressure difference of the drilling fluid on both sides of the hammer head 91 of the impact hammer 9 cannot be reversed, thus stopping the generation of high-frequency reciprocating circumferential impact, avoiding vibration and wear caused by idling, and improving the service life and safety of the tool.

[0070] In some alternative embodiments: see Figures 1 to 6 As shown, this application embodiment provides a circumferential impact drilling speed-up tool with anti-dry-spinning function. The two first inclined surfaces 21 of the circumferential impact drilling speed-up tool with anti-dry-spinning function are arranged on the same push block 2. The push block 2 is provided with a central hole connecting the sleeve 1 and the reversing sleeve 10. Guide blocks 6 are symmetrically arranged on the hammer body in the radial direction. The stop block 3 is slidably connected to the upper surface of the hammer body through the guide blocks 6.

[0071] In this embodiment of the application, two second inclined surfaces 31 are disposed on the same push block 2. The push block 2 is provided with a central hole connecting sleeve 1 and a reversing sleeve 10. A guide block 6 is fixedly installed on the upper end cover 7 of the hammer body and arranged symmetrically in the radial direction. The stop block 3 is slidably connected to the guide block 6, which can realize that the stop block 3 can move in a straight line inward or outward along the radial direction of the end cover.

[0072] For example, the upper end of the push block 2 is integrally formed with an annular flange, which is interference-fitted with the stepped hole pre-set on the upper part of the sleeve 1 to realize the fixed connection between the push block 2 and the sleeve 1; the cross section of the guide block 6 is I-shaped, the upper surface of the upper end cover 7 is provided with a first mounting groove 72, and the lower surface of the stop block 3 is provided with a second mounting groove 32. The cross sections of the first mounting groove 72 and the second mounting groove 32 are both T-shaped, so that the guide block 6 can pass through the first mounting groove 72 and the second mounting groove 32 at the same time, so as to realize the close contact and sliding connection between the stop block 3 and the upper surface of the upper end cover 7;

[0073] Two first inclined surfaces 21 are symmetrically arranged and slide in cooperation with the second inclined surfaces 31 of the two side blocks 3 respectively. The two side blocks 3 are connected by a tension spring through a hook 4. Four reversing flow channel holes 71 are provided on the upper cover 7 and are symmetrically arranged. One block 3 opens or closes two reversing flow channel holes 71 respectively.

[0074] When the circumferential 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 push block 2 to move down. The two first inclined surfaces 21 on the push block 2 push the second inclined surfaces 31 on the two stop blocks 3 respectively, so that the two stop blocks 3 move away from each other and move outward in a straight line along the guide block 6, exposing the reversing flow channel hole 71 of the upper end cover 7. The drilling fluid flows into the reversing chamber 107 of the reversing sleeve 10, realizing the conversion of the high and low pressure difference of the drilling fluid on both sides of the hammer head 91 of the impact hammer 9, generating a high-frequency reciprocating circumferential impact torque, which is transmitted to the drill bit connected to the lower part. This can eliminate the harmful "stick-slip" phenomenon of the drill bit, reduce the wear of the drill bit composite plate, and improve the mechanical drilling speed and stroke footage.

[0075] When the drilling fluid is circulated while the drill string is being lifted, the drill bit is lifted off the bottom of the well. The sleeve 1 drives the push block 2 to move upward. Under the action of the tension spring, the second inclined surface 31 of the stop block 3 and the first inclined surface 21 of the push block 2 always remain in contact, so that the two stop blocks 3 move closer to each other and move in a straight line along the guide block 6, blocking the reversing flow channel hole 71 of the upper end cover 7. The high-pressure drilling fluid cannot flow into the reversing chamber 107 of the reversing sleeve 10, and the high and low pressure difference of the drilling fluid on both sides of the hammer head 91 of the impact hammer 9 cannot be reversed. As a result, the high-frequency reciprocating circumferential impact will stop, avoiding vibration and wear caused by idling, and improving the service life and safety of the tool.

[0076] In some alternative embodiments: see Figure 1 As shown in the figure, this application embodiment provides a circumferential impact drilling speed-up tool with anti-spinning function. The circumferential impact drilling speed-up tool with anti-spinning function has a sliding block 15 and a sliding groove 101 that cooperate with each other between the hammer body and the sleeve 1. The sliding groove 101 extends along the axial direction of the sleeve 1.

[0077] In this embodiment of the application, a slider 15 and a groove 101 are provided between the hammer body and the sleeve 1. The slider 15 and the groove 101 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 push block 2 from hitting the upper end cover 7 when the hammer body moves up relative to the sleeve 1.

[0078] For example, in this embodiment, the hammer body includes an upper end cover 7, a hammer sleeve 8, a lower end cover 11, and a lower connector 16, which are fixedly connected in sequence along the axial direction. A slider 15 is fixedly connected to the lower connector 16. A sliding groove 101 extending along the axial direction is provided on the sleeve 1. The slider 15 can be installed by making a hole in the sleeve 1. The slider 15 is inserted into the pre-reserved fixing groove on the lower connector 16 through the hole on the sleeve 1, and then the hole is sealed by the plug 14. The slider 15 slides in the sliding groove 101, thereby limiting the axial displacement of the hammer body in the sleeve 1. In addition, a sliding sealing ring 13 is provided between the lower connector 16 and the sleeve 1 to ensure sliding sealing.

[0079] When the circumferential 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 15 on the lower connector 16 abuts against the upper end of the slide groove 101. At this time, the two side blocks 3 move away from each other and expose the reversing flow channel hole 71, ensuring that the circumferential impact drilling speed-up tool can stably generate high-frequency circumferential impact.

[0080] 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 15 to move down along the slide groove 101. The slider 15 on the lower connector 16 abuts against the lower end of the slide groove 101 to prevent the hammer body from detaching from the sleeve 1. At this time, the two side blocks 3 approach each other and block the reversing flow channel hole 71. The high-pressure drilling fluid cannot flow into the reversing chamber 107 of the reversing sleeve 10, and the high and low pressure difference of the drilling fluid on both sides of the hammer head 91 of the impact hammer 9 cannot be reversed, thus stopping the generation of high-frequency circumferential impact.

[0081] In some alternative embodiments: see Figures 1 to 15 As shown, this application embodiment provides a circumferential impact drilling speed-up tool with anti-spinning function. The hammer body of the circumferential impact drilling speed-up tool with anti-spinning function includes an upper end cover 7, a hammer sleeve 8, a lower end cover 11 and a lower connector 16 that are fixedly connected in sequence along the axial direction. The impact hammer 9 is located inside the hammer sleeve 8. The reversing flow channel hole 71 is located on the upper end cover 7. The stop block 3 is slidably connected to the surface of the upper end cover 7. The central holes of the upper end cover 7 and the lower end cover 11 are respectively connected to the two ends of the reversing sleeve 10.

[0082] The hammer body of this application embodiment includes an upper end cover 7, a hammer sleeve 8, a lower end cover 11, and a lower connector 16 that are fixedly connected in sequence along the axial direction. Specifically, the upper surface of the upper end cover 7 is provided with a bolt countersunk hole 73 for installing bolts 17. The bolts 17 pass through the upper end cover 7, the hammer sleeve 8, and the lower end cover 11 in sequence, and are connected to the lower connector 16, thereby connecting the upper end cover 7, the hammer sleeve 8, the lower end cover 11, and the lower connector 16 into a whole.

[0083] The reversing flow channel hole 71 is opened on the upper end cover 7. There are four reversing flow channel holes 71 and four bolt countersunk holes 73, which are arranged symmetrically. The center hole of the upper end cover 7 is a stepped hole, which can axially constrain the reversing sleeve 10 and realize the sliding docking of the upper and lower ends of the reversing sleeve 10 with the upper end cover 7 and the lower end cover 11, respectively.

[0084] In some alternative embodiments: see Figures 1 to 15 As shown, this application embodiment provides a circumferential impact drilling speed-up tool with anti-spinning function. The impact hammer 9 of the circumferential impact drilling speed-up tool with anti-spinning function has a ring structure. Hammer heads 91 are symmetrically arranged on the outer ring surface of the impact hammer 9, and hammer head first flow channel grooves 93 and hammer head second flow channel grooves 94 are respectively located on both sides of the hammer head 91. Inner keys 92 located in the reversing chamber 107 are symmetrically arranged on the inner ring surface of the impact hammer 9, and inner key first flow channel grooves 96 and inner key second flow channel grooves 95 are respectively located on both sides of the inner key 92.

[0085] The impact hammer 9 of this embodiment has an integrally formed hammer head 91 and inner key 92, which respectively cooperate with the impact chamber 84 on the hammer sleeve 8 and the reversing chamber 107 on the reversing sleeve 10. The hammer head 91 has a first flow channel groove 93 and a second flow channel groove 94 on both sides, which can realize the introduction or export of drilling fluid into or out of the impact chamber 84. The inner key 92 has a first flow channel groove 96 and a second flow channel groove 95 on both sides, which can realize the introduction or export of drilling fluid into or out of the reversing chamber 107.

[0086] In some alternative embodiments: see Figures 1 to 15 As shown in the figure, this application embodiment provides a circumferential impact drilling speed-up tool with anti-free spin function. The lower end cover 11 of the circumferential impact drilling speed-up tool with anti-free spin function has a nozzle 12 installed in the center hole. The reversing chambers 107 are symmetrically arranged. The reversing chambers 107 are provided with a first flow channel groove 103 and a second flow channel groove 104 of the reversing sleeve located between the two reversing chambers 107. The reversing sleeve 10 is also symmetrically provided with a first low-pressure flow channel groove 105 and a second low-pressure flow channel groove 106 of the reversing sleeve.

[0087] The circumferential impact drilling acceleration tool of this application embodiment can create a high-pressure zone for the drilling fluid by pressing it at the nozzle 12 as the drilling fluid flows through the center hole of the sleeve 1, the center hole of the pusher block 2, the center hole of the reversing sleeve 10, and the nozzle 12. The reversing sleeve 10 is provided with a first flow channel groove 103 and a second flow channel groove 104, as well as a first low-pressure flow channel groove 105 and a second low-pressure flow channel groove 106.

[0088] The first flow channel groove 103 and the second flow channel groove 104 of the reversing sleeve are used to connect with the first flow channel groove 93 and the second flow channel groove 94 of the hammer head, respectively. The first low-pressure flow channel groove 105 and the second low-pressure flow channel groove 106 of the reversing sleeve are used to connect with the first flow channel groove 93 and the second flow channel groove 94 of the hammer head.

[0089] In some alternative embodiments: see Figures 1 to 15 As shown, this application embodiment provides a circumferential impact drilling speed-up tool with anti-spinning function. The hammer sleeve 8 of the circumferential impact drilling speed-up tool with anti-spinning function is symmetrically provided with impact chambers 84 for accommodating hammer heads 91, and hammer sleeve first reversing flow channel groove 81 and hammer sleeve second reversing flow channel groove 82 located between the two impact chambers 84 and communicating with the reversing flow channel hole 71. Hammer sleeve 8 is also symmetrically provided with hammer sleeve low-pressure flow channel groove 83.

[0090] The hammer sleeve 8 of this application embodiment is provided with a first reversing flow channel groove 81 and a second reversing flow channel groove 82. The first reversing flow channel groove 81 is used to connect with the first flow channel groove 96 of the inner key, and the second reversing flow channel groove 82 is used to connect with the second flow channel groove 95 of the inner key. The hammer sleeve 8 is also symmetrically provided with a low-pressure flow channel groove 83, which is used to connect with the first flow channel groove 96 or the second flow channel groove 95 of the inner key.

[0091] In some alternative embodiments: see Figures 1 to 15 As shown, this application embodiment provides a circumferential impact drilling speed-up tool with anti-idling function. The lower end cover 11 of the circumferential impact drilling speed-up tool with anti-idling function is provided with a lower end cover first low pressure flow channel groove 111 that communicates with the hammer sleeve low pressure flow channel groove 83, and two lower end cover second low pressure flow channel grooves 112 that communicate with the reversing sleeve first low pressure flow channel groove 105 and the reversing sleeve second low pressure flow channel groove 106 respectively.

[0092] The lower connector 16 is provided with a lower connector low pressure channel groove 161 that connects to the first low pressure channel groove 111 of the lower end cover, and the second low pressure channel groove 112 of the lower end cover is connected to the center hole of the lower connector 16.

[0093] In this embodiment, the first low-pressure flow channel 111 of the lower end cover connects the low-pressure flow channel 83 of the hammer sleeve and the low-pressure flow channel 161 of the lower connector, allowing the drilling fluid of the reversing chamber 107 to be smoothly discharged into the central hole of the lower connector 16; the two second low-pressure flow channel channels 112 of the lower end cover are respectively connected to the first low-pressure flow channel 105 and the second low-pressure flow channel 106 of the reversing sleeve, allowing the drilling fluid of the impact chamber 84 to be smoothly discharged into the central hole of the lower connector 16.

[0094] Specifically, the working process of the circumferential impact drilling speed-up tool in this application embodiment is as follows:

[0095] When the circumferential 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 loads downward through the sleeve 1.

[0096] The drill string is lowered from the wellhead to the bottom of the well. During the period from the drill bit's initial contact with the bottom of the well until the drilling pressure stabilizes, the sleeve 1 moves the pusher block 2 downwards. The first inclined surfaces 21 on both sides push the second inclined surfaces 31 on both sides, causing the stop block 3 to move outwards in a straight line along the guide block 6, exposing the four reversing flow channel holes 71 of the upper end cover 7 (e.g., ...). Figure 2 and Figure 11 As shown), the slider 15 on the lower connector 16 slides to the upper end of the groove 101 on the sleeve 1 (as shown). Figure 1 (As shown).

[0097] Drilling fluid flows in from the central hole at the top of the casing 1. Part of the drilling fluid flows through the central holes of the pusher block 2, the upper end cap 7, the reversing sleeve 10, and the nozzle 12, and is pressurized at the nozzle 12, forming a high-pressure zone for the drilling fluid. For example... Figure 12 As shown, some of the high-pressure drilling fluid enters the impact chamber 84 through the first flow channel 103 of the reversing sleeve and the first flow channel 93 of the hammer head, and applies high pressure to one side of the hammer head 91.

[0098] On the other side of the hammerhead 91, it connects to the low-pressure area at the tool outlet through the second flow channel groove 94 of the hammerhead and the second low-pressure flow channel groove 106 of the reversing sleeve, forming a low-pressure zone. Therefore, under the action of high and low pressure of drilling fluid on both sides of the hammerhead 91, the impact hammer 9 rotates clockwise at high speed around the tool axis, while the hammerhead 91 drives the reversing sleeve 10 to rotate synchronously through the two internal keys 92.

[0099] like Figure 13 As shown, when the hammer 91 strikes one side of the impact chamber 84 clockwise, it generates an impact torque that is transmitted to the lower drill bit, eliminating the "stick-slip" phenomenon of the drill bit, reducing the wear of the drill bit composite plate, and improving the mechanical drilling speed and stroke footage. At the instant the hammer 91 strikes the impact chamber 84 clockwise, some of the high-pressure drilling fluid enters the gap between the reversing chamber 107 and the inner key 92 through the reversing flow channel hole 71 of the upper end cover 7, the first reversing flow channel groove 81 of the hammer sleeve, and the first flow channel groove 96 of the inner key, forming a high-pressure zone; at the same time, the space on the other side of the reversing chamber 107 that is not in contact with the inner key 92 is connected to the low pressure at the tool outlet through the second flow channel groove 95 of the inner key and the low-pressure flow channel groove 83 of the hammer sleeve, forming a low-pressure zone.

[0100] The reversing sleeve 10 continues to rotate clockwise until the inner key 92 contacts the other side of the reversing chamber 107. At this point, the high and low pressure reversal of the drilling fluid on both sides of the hammerhead 91 is achieved (e.g., Figure 14 As shown, the impact hammer 9 rotates counterclockwise around the tool axis to strike the tool. This process repeats continuously, generating high-frequency reciprocating circumferential impacts as the high-pressure drilling fluid flows through the tool.

[0101] When the drilling fluid is circulated while the drill string is being raised, the drill bit leaves the bottom of the well. Under the action of gravity and hydraulic pressure, the drill bit, the lower tool connector 16, and all parts between the stop block 3 move downwards as a whole, while the sleeve 1 and the push block 2 move upwards relative to the stop block 3. At this time, under the action of the tension spring, the two stop blocks 3 move in a straight line along the guide block 6, blocking the four reversing flow channel holes 71 on the upper end cover 7 (e.g., ...). Figure 15 As shown), high-pressure drilling fluid cannot enter the reversing chamber 107 through the reversing flow channel hole 71, the hammer sleeve first reversing flow channel groove 81, and the inner key first flow channel groove 96 (as shown). Figure 13 As shown, it cannot achieve the conversion of high and low pressure difference of drilling fluid on both sides of the hammer 91. When the tool stops, it generates high-frequency reciprocating circumferential impact, avoiding vibration and wear caused by idling, and improving the service life and safety of the tool.

[0102] 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.

[0103] 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.

[0104] 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 circumferential impact drilling speed-up tool with anti-idling function, 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 (9) rotatably connected to the hammer body. A reversing sleeve (10) is rotatably connected inside the impact hammer (9). A reversing chamber (107) is provided on the reversing sleeve (10). A reversing flow channel hole (71) for conveying drilling fluid to the reversing chamber (107) is provided on the hammer body. The flow channel switching unit includes a stop (3) slidably connected to the surface of the hammer body, and a transmission mechanism connected between the sleeve (1) and the stop (3). The transmission mechanism is used to convert the axial movement of the stop (3) into radial movement to open or close the reversing flow channel hole (71). The transmission mechanism includes a push block (2) fixed inside the sleeve (1) and located above the hammer body. The push block (2) is provided with a first inclined surface (21) facing the stop block (3), and the stop block (3) is provided with a second inclined surface (31) slidably connected to the first inclined surface (21). The number of the stop blocks (3) is two and they are arranged symmetrically. The number of the first inclined surfaces (21) is two and they are located between the two stop blocks (3). The transmission mechanism also includes an elastic element (5) connecting the two stop blocks (3). The elastic element (5) is used to radially tighten the two stop blocks (3) so that the first inclined surface (21) and the second inclined surface (31) remain in contact. Two first inclined surfaces (21) are disposed on the same push block (2), and the push block (2) is provided with a central hole connecting the sleeve (1) and the reversing sleeve (10); guide blocks (6) are symmetrically disposed on the hammer body along the radial direction, and the stop block (3) is slidably connected to the upper surface of the hammer body through the guide blocks (6); A sliding block (15) and a sliding groove (101) are provided between the hammer body and the sleeve (1), and the sliding groove (101) extends along the axial direction of the sleeve (1). The hammer body includes an upper end cover (7), a hammer sleeve (8), a lower end cover (11), and a lower connector (16) that are fixedly connected in sequence along the axial direction. The impact hammer (9) is located inside the hammer sleeve (8). The reversing flow channel hole (71) is located on the upper end cover (7). The stop block (3) is slidably connected to the surface of the upper end cover (7). The central holes of the upper end cover (7) and the lower end cover (11) are respectively connected to the two ends of the reversing sleeve (10).

2. The circumferential impact drilling speed-up tool with anti-idling function as described in claim 1, characterized in that: The impact hammer (9) has a ring structure. Hammer heads (91) are symmetrically arranged on the outer ring surface of the impact hammer (9), and hammer head first flow channel groove (93) and hammer head second flow channel groove (94) are respectively located on both sides of the hammer head (91). The inner ring surface of the impact hammer (9) is symmetrically provided with an inner key (92) located in the reversing chamber (107), and an inner key first flow channel groove (96) and an inner key second flow channel groove (95) located on both sides of the inner key (92).

3. The circumferential impact drilling speed-up tool with anti-idling function as described in claim 2, characterized in that: A nozzle (12) is provided in the center hole of the lower end cover (11). The reversing chamber (107) is symmetrically arranged. The reversing chamber (107) is provided with a first flow channel groove (103) and a second flow channel groove (104) of the reversing sleeve located between the two reversing chambers (107). The reversing sleeve (10) is also symmetrically provided with a first low-pressure flow channel groove (105) and a second low-pressure flow channel groove (106).

4. The circumferential impact drilling speed-up tool with anti-idling function as described in claim 3, characterized in that: The hammer sleeve (8) is symmetrically provided with an impact chamber (84) for accommodating the hammer head (91), and a first reversing flow channel groove (81) and a second reversing flow channel groove (82) located between the two impact chambers (84) and connected to the reversing flow channel hole (71). The hammer sleeve (8) is also symmetrically provided with a low-pressure flow channel groove (83).

5. The circumferential impact drilling speed-up tool with anti-idling function as described in claim 4, characterized in that: The lower end cover (11) is provided with a first low pressure flow channel (111) of the lower end cover that communicates with the low pressure flow channel (83) of the hammer sleeve, and two second low pressure flow channel channels (112) of the lower end cover that communicate with the first low pressure flow channel (105) of the reversing sleeve and the second low pressure flow channel (106) of the reversing sleeve respectively. The lower connector (16) is provided with a lower connector low pressure channel groove (161) that connects to the first low pressure channel groove (111) of the lower end cover, and the second low pressure channel groove (112) of the lower end cover is connected to the center hole of the lower connector (16).

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