[0028] Such as figure 1 As shown, the speed-up tool for torsional percussion drilling of the present invention includes a casing 1, a seat body 14, a diversion unit, an impact unit and an anti-drop unit; it is characterized in that the upper end of the casing 1 is provided with a male connecting drill collar Buckle 15, the lower end is provided with a housing spline 16 that cooperates with the seat body spline 20. The housing 1 contains a flow guide unit, an impact unit and an anti-drop unit; the upper end of the seat body 14 is provided with an impact hammer 8 The inner cavity of the lower end is provided with a female buckle 19 for connecting the drill bit and a seat spline 20 for functioning with the housing spline 16; the flow guide unit includes a sand removal sleeve 2, a sealing cover 3 and a screen 6; The impact unit includes a positioning sleeve 7, an impact hammer 8, an upper needle bearing 4, an upper deep groove ball bearing 5, a lower deep groove ball bearing 9 and a lower needle bearing 10. The impact hammer 8 is provided with a starting hammer 27 and an impact The hammer head 28, the starting hammer head 27 and the positioning sleeve 7 form a starting chamber 33, the starting hammer head 27 acts in the starting chamber 33, the impact hammer head 28 acts in the impact chamber 25 of the seat body 14, the upper and lower ends of the impact hammer 8 The upper and lower deep groove ball bearings 5 and the lower needle roller bearings 10 are connected to the housing 14 respectively. The upper and lower ends of the positioning sleeve 7 are respectively connected to the screen 6 through the upper needle roller bearings 4 and the lower deep groove ball bearings 9; the anti-drop unit includes Anti-dropping block 11, bolt 12, spring 13, housing anti-dropping groove 17 and seat body anti-dropping groove 21.
[0029] Such as Figure 8 As shown, the torsional impact drilling speed-up tool is characterized in that four 45o housing splines 16 are evenly distributed at the lower end of the housing 1, and four 50o spline grooves are evenly distributed on the outer side of the lower end of the housing 14. The housing splines 16 There is a gap with the spline groove of the seat body to completely transmit the impact energy to the drill bit.
[0030] Such as Figure 7 As shown, the torsional impact drilling speed-up tool is characterized in that the housing 1 is provided with two housing anti-drop grooves 17 and two bolt holes 18, the bolt holes 18 are used as a passage for the removal of the anti-drop device, and the bolt 12 is used for Seal the bolt hole 18; the seat body 14 is provided with two seat body anti-drop grooves 21, the radial thickness of the anti-drop block 11 is smaller than the depth of the seat body anti-drop groove 21, and the anti-drop block 11 is compressed in the seat body anti-drop groove 21; When the seat body anti-dropping groove 21 moves to the housing anti-dropping groove 17 to form a cavity, the spring 13 is released and the anti-dropping block 11 is pushed to the housing anti-dropping groove 17 and closely abuts the wall surface of the housing anti-dropping groove 17. When the tool is removed, the anti-dropping block 11 is compressed through the bolt hole 18 to be completely located in the anti-dropping groove 21 of the seat body, and the housing 1 and the seat body 14 are axially staggered to achieve the purpose of disassembly.
[0031] Such as Figure 2-6 As shown, the speed-up tool for torsional percussion drilling is characterized in that the number of impact cavities of the seat body is two, and the seat body 14 and the sealing cover 3 are each provided with four diversion grooves 22. Such as Figure 10-14 As shown, the torsional impact drilling speed-up tool is characterized in that: the starting hammer head 27 on the impact hammer 8, the impact hammer head 28, the starting cavity forward impact drainage groove 29, the starting cavity counterattack drainage channel 30, the impact cavity The number of counterattack drain grooves 31 and the impact cavity front drain slots 32 are all two; the number of the positioning sleeve front attack runners 34 and the positioning sleeve counterattack runner 35 on the positioning sleeve 7 are all two.
[0032] The torsional impact drilling speed-up tool is characterized in that: the sealing cover 3 of the diversion unit is used to seal the upper end surface of the impact unit, and the upper end of the sealing cover 3 is provided with a lateral channel for fluid to return and is used for placing sand removal In the step of the sleeve 2, the screen 6 is fixed inside the base 14.
[0033] Such as Picture 9 As shown, the speed-up tool for torsional percussion drilling is characterized in that the middle part of the screen 6 is provided with side flow grooves 38 evenly distributed in the circumferential direction, and the lower part of the screen 6 is provided with drainage holes 39.
[0034] During the operation of the present invention, the upper end of the tool is connected to a drill collar or other power drilling tool, and the lower end is directly connected to the drill bit. The torque and weight on bit transmitted by the wellhead turntable through the drill string are transmitted through the cooperation of the housing spline 16 and the seat spline 20. Part of the drilling fluid flowing into the tool flows directly through the hollow channel of the screen 6 to the drill bit; part of the drilling fluid flows into the forward strike start runner 24 or the counter strike start runner 23 through the diversion groove 22, enters the start cavity 33 and then flows to the drain groove 26 It is discharged from the drain hole 39; the other part flows through the side flow groove 38 through the positioning sleeve front hitting flow passage 34 or the positioning sleeve counterattack flow passage 35, enters the impact cavity 25, and is discharged from the drain hole 39.
[0035] image 3 This is a cross-sectional view at the time when the forward rotation of the impact hammer 8 is completed, that is, when the impact hammer 8 frontally impacts the seat 14. During the rotation, the positioning sleeve 7 rotates together with the impact hammer 8. On the one hand, when the impact hammer 28 impacts the seat body 14 and stops rotating, the positioning sleeve 7 continues to rotate due to inertia; on the other hand, the starting cavity 33 gradually shifts to the start On the other side of the hammer head 27, the high-pressure fluid flows from the diversion groove 22 through the counter-attack starting flow passage 23, and then enters the newly formed starting chamber 33 through the starting chamber counter-attack drainage passage 30 to accelerate the forward rotation of the positioning sleeve 7. The fluid in the starting cavity 33 is compressed due to the forward rotation of the positioning sleeve 7, and is discharged from the starting cavity to the drain groove 29 to the drain groove 26. After the positioning sleeve 7 has been turned forward, the tool enters Figure 4 The working status shown. At this time, neither the impact hammer 8 nor the positioning sleeve 7 can rotate forward, and the high-pressure fluid entering the newly formed starting cavity 33 from the counterattack starting flow channel 23 pushes the impact hammer 8 to start to reverse. The front impact surface 36 begins to separate from the seat body 14 and forms an impact cavity 25. At this time, the fluid from the positioning sleeve counterattack channel 35 enters the impact cavity 25 through the impact cavity forward impact drain groove 32 and accelerates the reversal of the impact hammer 8; The impact cavity 25 formed by the counter impact surface 37 and the seat body 14 on the other side of the head 28 is continuously reduced, and the internal fluid is discharged from the impact cavity counterattack drain groove 31. After the reversal of the impact hammer 8 is completed, the tool enters Figure 5 The working status shown. During the reversal of the impact hammer 8, the impact hammer 8 drives the positioning sleeve 7 to rotate together. On the one hand, when the impact hammer 28 impacts the seat body 14 to stop reversing, the positioning sleeve 7 continues to reverse due to inertia; on the other hand, the starting cavity 33 is transferred to On the other side of the starting hammer 27, the high-pressure fluid flows from the diversion groove 22 through the forward strike starting flow channel 24, and then enters the starting cavity 33 through the starting cavity positive drain groove 29, accelerating the reversal of the positioning sleeve 7. The fluid in the starting chamber 33 is compressed due to the reversal of the positioning sleeve 7, and is discharged from the starting chamber to the drain groove 30 to the drain groove 22. After the positioning sleeve 7 is reversed, the tool enters Image 6 The working status shown. At this time, neither the impact hammer 8 nor the positioning sleeve 7 can be reversed, and the high-pressure fluid entering the activation cavity 33 from the forward hitting start channel 24 pushes the impact hammer 8 to start to reverse. The anti-impact surface 37 begins to separate from the seat body 14 and forms an impingement cavity 25. At this time, the fluid in the direct hitting flow channel 34 of the positioning sleeve passes through the impingement cavity to counteract the fluid in the drain groove 31 into the impingement cavity 25 and accelerates the forward rotation of the impact hammer 8. After the impact hammer 8 is completed, the tool enters image 3 The working status shown.
[0036] The above-mentioned operation process is a complete working cycle of the torsional impact drilling speed-up tool, and the tool will repeat the above-mentioned operation continuously, thereby forming high-frequency impact. The impact generated by the tool will be directly transmitted from the seat to the drill bit, achieving the purpose of providing high-frequency torsional impact to the drill bit.
