阅读说明：本技术 一种防空打式扭冲工具 (Air-impact-proof twisting and punching tool ) 是由 甘心 侯树刚 晁文学 兰凯 李帮民 孔华 于 2018-07-27 设计创作，主要内容包括：本发明公开了一种防空打式扭冲工具,包括上接头、传动接头、上壳体、半圆卡、中接头、浮阀、下壳体、弹簧、阀座、分流盖、换向器、摆锤、导流板、喷嘴、喷嘴底座和锤座；上接头与传动接头之间存在传动面,上接头带动半圆卡可以在上壳体内部上下移动,实现钻井液流道之间的开启和关闭。本发明有益效果：在井底工作时能够产生周期性扭转冲击力,提高钻头破岩扭矩、改善切削齿破岩环境、降低钻头粘滑振动；在起下钻时,能够使扭转冲击动作停止,起到防止空打现象对工具外壳及连接螺纹造成的非正常损坏。(The invention discloses an idle-beating-prevention type torsional impact tool which comprises an upper joint, a transmission joint, an upper shell, a semicircular clamp, a middle joint, a floating valve, a lower shell, a spring, a valve seat, a flow dividing cover, a commutator, a pendulum bob, a flow guide plate, a nozzle base and a hammer base, wherein the upper joint is connected with the transmission joint through the transmission joint; there is the driving surface between top connection and the transmission joint, and the top connection drives the semicircle card and can reciprocates in last casing, realizes opening and closing between the drilling fluid runner. The invention has the beneficial effects that: the drill bit can generate periodic torsional impact force when working at the bottom of a well, improve the rock breaking torque of the drill bit, improve the rock breaking environment of the cutting teeth and reduce the stick-slip vibration of the drill bit; when the drill is started or stopped, the torsional impact action can be stopped, and abnormal damage to the tool shell and the connecting thread caused by the idle drilling phenomenon can be prevented.)

1. An idle-beating-prevention type torsional impact tool is characterized by comprising an upper connector (1), a transmission shell, a clamping ring, a middle connector (5), a floating valve (6), a lower shell (7), an elastic device, a valve seat (9) and a torsional impact mechanism;

the upper joint (1) and the transmission shell are in matched transmission through a transmission surface (17), the clamping ring is sleeved on the upper joint (1) and can move up and down relative to the transmission shell along with the upper joint, and the clamping ring can be hung upwards and leaned on the transmission shell; a central liquid inlet channel (18) is arranged in the upper joint (1);

the middle joint (5) is fixedly connected to the transmission shell; an upper central flow passing channel (51) and an upper axial flow leaking channel (52) are arranged in the middle joint (5), and the upper axial flow leaking channel (52) is communicated with an inlet of the flow leaking channel of the valve seat (9);

an upper drainage cavity (19) is formed between the upper joint (1) and the middle joint (5) at least under the condition that the clamping ring moves upwards to be hung on the transmission shell, and the upper drainage cavity (19) is communicated with the central liquid inlet channel (18) and the upper axial drainage channel (52);

at least under the condition that the upper joint (1) is moved downwards to contact the middle joint (5), the upper drainage cavity (19) is in a closed state, and the upper central runner (51) is communicated with the central liquid inlet channel (18);

the lower shell (7) is fixedly connected to the middle joint (5), and the valve seat (9) and the twisting and punching mechanism are arranged in the lower shell (7);

the floating valve (6) and the elastic device are arranged in the valve seat (9), the elastic device can provide pre-tightening force for the floating valve (6) towards the middle joint (5), and the pre-tightening force can enable the floating valve (6) to move towards the middle joint (5) and cut off the communication between the inlet of the overflowing structure of the floating valve (6) and the upper central overflowing channel (51) when the pressure of drilling fluid borne by the floating valve (6) is smaller than a preset value;

an outlet of the overflowing structure of the floating valve (6) is communicated with a liquid inlet channel of the twisting and flushing mechanism, and an outlet of a flow discharge channel of the valve seat (9) is communicated with a flow discharge channel of the twisting and flushing mechanism.

2. The air-beating-preventing type twisting and impacting tool according to claim 1, wherein the transmission housing comprises a fixedly connected transmission joint (2) and an upper housing (3), the upper joint (1) and the transmission joint (2) are in matched transmission through a transmission surface (17), and the upper housing (3) is fixedly connected to the middle joint (5); the snap ring can move upwards to the upper end face of the snap ring to be hung on the lower end face of the transmission joint (2), and the inner side wall face of the upper shell (3) is in contact fit with the outer circular face of the snap ring.

3. The air impact resistant wrenching tool according to claim 1, characterized in that there is a conformable conical surface between the upper joint (1) and the middle joint (5).

4. The air impact resistant wrenching tool according to claim 1, characterized in that said snap ring consists of two semicircular clips (4).

5. The air-break-proof torsional impact tool is characterized in that the flow passing structure of the floating valve (6) comprises a radial flow passing hole (62) and a lower central flow passing channel (63), an annular flow passing cavity (61) is formed between the floating valve (6) and the valve seat (9), the radial flow passing hole (62) is used for communicating the lower central flow passing channel (63) with the annular flow passing cavity (61), and the outlet of the lower central flow passing channel (63) is communicated with a liquid inlet channel of the torsional impact mechanism.

6. The air-break-proof torsional impact tool as claimed in claim 1, wherein the leakage flow channel of the valve seat (9) comprises a lower axial leakage flow channel (91) and a radial leakage flow channel (92), an inlet of the lower axial leakage flow channel (91) is communicated with the upper axial leakage flow channel (52), and an outlet is communicated with the leakage flow channel of the torsional impact mechanism through the radial leakage flow channel (92).

7. A runaway percussion tool as claimed in any one of claims 1-6, characterised in that the percussion mechanism comprises a commutator (11), a pendulum (12) and a hammer block (16);

the hammer seat (16) is fixedly connected to the lower shell (7), the pendulum bob (12) is arranged in the hammer seat (16), and the commutator (11) is placed inside the pendulum bob (12) and can rotate;

the hammer seat (16) is provided with a liquid inlet groove (162) and a liquid outlet groove (163), and the liquid inlet groove (162) is communicated with an outlet of the overflowing structure of the float valve (6);

an impact cavity (161) is formed between the hammer seat (16) and the pendulum hammer (12), and the impact cavity (161) can push the pendulum hammer (12) to rotate clockwise or anticlockwise relative to the hammer seat (16) through drilling fluid in the impact cavity;

the commutator (11) is provided with an inlet channel (111) and a discharge channel (112), the inlet channel (111) is communicated with an outlet of the overflowing structure of the float valve (6), a reversing cavity (113) is formed between the commutator (11) and the pendulum bob (12), and the reversing cavity (113) can promote relative rotation between the commutator (11) and the pendulum bob (12) through drilling fluid in the reversing cavity (113);

the pendulum bob (12) is provided with a first runner (121) and a second runner (122), the first runner (121) can realize the communication and the switching between the reversing cavity (113) and the liquid inlet channel (162) and the liquid outlet channel (163), and the second runner (122) can realize the communication and the switching between the impact cavity (161) and the liquid inlet channel (111) and the liquid outlet channel (112).

8. The air-hammer-preventing twisting and impacting tool is characterized in that an annular leakage flow cavity (71) is formed between the hammer seat (16) and the lower shell (7), an outlet of a leakage flow channel of the valve seat (9) is communicated with the annular leakage flow cavity (71), the hammer seat (16) is further provided with a lower leakage flow hole (164), and the lower leakage flow hole (164) is communicated with the annular leakage flow cavity (71) and a through hole in the hammer seat (16).

9. The air blast proof torquing tool of claim 7, further comprising a nozzle (14) housed in said hammer seat (16), said nozzle (14) communicating with an outlet of a flow structure of said float valve (6).

10. The air impact prevention type twisting tool according to claim 7, wherein the twisting mechanism further comprises a flow dividing cover (10), the flow dividing cover (10) is provided with a radial flow dividing hole (101) and a plurality of axial liquid inlet holes (102) communicated with the radial flow dividing hole, and the number of the liquid inlet grooves (162) is a plurality of axial liquid inlet holes (102) in one-to-one correspondence.

Technical Field

The invention relates to the technical field of oil-gas exploration, geological exploration and geothermal well development, in particular to an idle-strike-prevention type torsional impact tool.

Background

Along with the increasing proportion of deep wells and ultra-deep wells in the field of oil and gas exploration, the problems of slow mechanical drilling speed, short stroke footage and large drill bit consumption are increasingly highlighted in the drilling construction process. Therefore, petroleum workers at home and abroad develop corresponding technology and equipment attack, various speed-up tools are continuously developed, and the twisting and punching tool is one of the tools. The torsional impact tool mainly has the functions of improving the rock breaking torque of the drill bit, improving the rock breaking environment of the cutting teeth and reducing the stick-slip vibration of the drill bit, thereby achieving the purposes of protecting the drill bit and increasing the stroke footage.

However, the torsional impact tool represents a significant problem after a large number of field applications: when the existing torsional impact tool is used for drilling, as long as drilling fluid is circulated, the torsional impact tool can work and generate periodic torsional impact force, and due to the lack of the supporting and offsetting action of well bottom rocks, the tool is in a blank driving state, the generated torsional impact force can only act on a tool shell and connecting threads, so that the phenomena of tool shell fracture and connecting thread loosening and buckling are caused for many times, and a downhole malignant accident is very easy to induce.

Therefore, the urgent need is to develop a novel torsional impact tool, which can realize the function switching under the two states of shaft bottom work and tripping so as to avoid the appearance of the phenomena of tool shell fracture and connection thread loosening and tripping.

Disclosure of Invention

In view of the above, the invention provides an idle-run-preventing torsional impact tool, which can generate periodic torsional impact force during downhole operation, and has the functions of increasing the rock breaking torque of a drill bit, improving the rock breaking environment of a cutting tooth, and reducing stick-slip vibration of the drill bit, and can stop torsional impact action during tripping up and tripping down, so as to prevent the idle-run-preventing phenomenon from causing abnormal damage to a tool housing and a connecting thread.

In order to achieve the purpose, the invention provides the following technical scheme:

an idle-beating-prevention type torsional impact tool is characterized by comprising an upper connector, a transmission shell, a clamping ring, a middle connector, a floating valve, a lower shell, an elastic device, a valve seat and a torsional impact mechanism;

the upper joint and the transmission shell are in matched transmission through a transmission surface, the clamping ring is sleeved on the upper joint and can move up and down relative to the transmission shell along with the upper joint, and the clamping ring can be hung upwards and leaned on the transmission shell; a central liquid inlet channel is arranged inside the upper joint;

the middle joint is fixedly connected to the transmission shell; an upper central flow passage and an upper axial flow leakage passage are arranged in the middle connector, and the upper axial flow leakage passage is communicated with an inlet of the flow leakage passage of the valve seat;

at least under the condition that the clamping ring moves upwards to be hung on the transmission shell, an upper drainage cavity is formed between the upper joint and the middle joint and is communicated with the central liquid inlet channel and the upper axial drainage channel;

at least under the condition that the upper joint moves downwards to contact with the middle joint, the upper drainage cavity is in a closed state, and the upper central overflow channel is communicated with the central liquid inlet channel;

the lower shell is fixedly connected with the middle joint, and the valve seat and the twisting and punching mechanism are arranged in the lower shell;

the floating valve and the elastic device are arranged in the valve seat, the elastic device can provide pre-tightening force towards the middle joint for the floating valve, and the pre-tightening force can enable the floating valve to move towards the middle joint when the pressure of drilling fluid borne by the floating valve is smaller than a preset value, and cut off the communication between the inlet of the overflowing structure of the floating valve and the upper central overflowing channel;

the outlet of the overflow structure of the float valve is communicated with the liquid inlet channel of the twisting and flushing mechanism, and the outlet of the discharge channel of the valve seat is communicated with the discharge channel of the twisting and flushing mechanism.

Preferably, the transmission housing comprises a transmission joint and an upper housing which are fixedly connected, the upper joint and the transmission joint are in matched transmission through a transmission surface, and the upper housing is fixedly connected to the middle joint; the snap ring can move upwards until the upper end face of the snap ring is hung on the lower end face of the transmission joint, and the inner side wall face of the upper shell is in contact fit with the outer circular face of the snap ring.

Preferably, a conical surface capable of being attached is arranged between the upper joint and the middle joint.

Preferably, the snap ring consists of two semicircular clips.

Preferably, the flow passing structure of the float valve comprises a radial flow passing hole and a lower central flow passing channel, an annular flow passing cavity is formed between the float valve and the valve seat, the lower central flow passing channel is communicated with the annular flow passing cavity through the radial flow passing hole, and an outlet of the lower central flow passing channel is communicated with a liquid inlet cavity channel of the torsion flushing mechanism.

Preferably, the leakage flow passage of the valve seat comprises a lower axial leakage flow passage and a radial leakage flow passage, an inlet of the lower axial leakage flow passage is communicated with the upper axial leakage flow passage, and an outlet of the lower axial leakage flow passage is communicated with the leakage flow cavity passage of the twisting and punching mechanism through the radial leakage flow passage.

Preferably, the twisting and punching mechanism comprises a commutator, a pendulum bob and a hammer seat;

the hammer seat is fixedly connected with the lower shell, the pendulum bob is arranged in the hammer seat, and the commutator is arranged in the pendulum bob and can rotate;

the hammer seat is provided with a liquid inlet groove and a liquid outlet groove, and the liquid inlet groove is communicated with an outlet of the overflowing structure of the float valve;

an impact cavity is formed between the hammer seat and the pendulum bob, and the impact cavity can push the pendulum bob to rotate clockwise or anticlockwise relative to the hammer seat through drilling fluid in the impact cavity;

the commutator is provided with a liquid inlet channel and a liquid outlet channel, the liquid inlet channel is communicated with an outlet of the overflow structure of the float valve, a reversing cavity is formed between the commutator and the pendulum bob, and the reversing cavity can drive the commutator and the pendulum bob to rotate relatively through drilling fluid in the reversing cavity;

the pendulum bob is provided with a first flow passage and a second flow passage, the first flow passage can realize the communication and the switching between the reversing cavity and the liquid inlet groove as well as the liquid discharge groove, and the second flow passage can realize the communication and the switching between the impact cavity and the liquid inlet groove as well as the liquid discharge groove.

Preferably, the hammer seat with be formed with annular leakage flow chamber between the casing down, the export intercommunication of the leakage way of disk seat annular leakage flow chamber, the hammer seat still is equipped with down the discharge orifice, down the discharge orifice with annular leakage flow chamber with through-hole intercommunication in the hammer seat.

Preferably, the hammer further comprises a nozzle arranged in the hammer seat, and the nozzle is communicated with an outlet of the overflowing structure of the float valve.

Preferably, turn round towards mechanism still includes the reposition of redundant personnel lid, the reposition of redundant personnel lid is equipped with radial reposition of redundant personnel hole and a plurality of axial feed liquor hole rather than the intercommunication, the quantity of feed liquor groove be with a plurality of axial feed liquor hole one-to-one.

According to the technical scheme, when the idle-driving-prevention torsional impact tool works at the bottom of a well, under the action of drilling pressure, the inner conical surface at the lower end of the upper connector is attached to the outer conical surface at the upper end of the middle connector, the upper drainage cavity is in a closed state, drilling fluid pushes away the floating valve with the spring pre-tightening action, flows into the lower central overflow channel and then is divided into three parts, the three parts respectively push the pendulum bob and the commutator to drive the pendulum bob and the hammer seat to generate periodic reciprocating contact collision, and torsional impact force is generated. When the drilling bit is started, the upper connector drives the semicircular clamp to extend outwards relative to other parts under the action of self weight, the upper drainage cavity is in an open state, most drilling fluid directly flows into the drill bit through the upper axial drainage channel, the lower axial drainage channel, the radial drainage channel, the annular drainage cavity and the drainage hole, so that the pressure value of drilling fluid in the upper central through channel is reduced, the upper central through channel outlet is closed by the floating valve under the action of the pre-tightening force of the spring, the pendulum bob stops working, and the idle running prevention function is realized.

In summary, compared with the prior art, the invention has the following beneficial effects:

1. the invention can generate periodic torsional impact force to act on the drill bit when the well bottom works, thereby improving the rock breaking torque of the drill bit, improving the rock breaking environment of the cutting teeth, reducing the stick-slip vibration of the drill bit, stopping the torsional impact action when the drill is started or stopped, avoiding the idle driving phenomenon, and preventing the fracture of a tool shell and the loosening and tripping of a connecting thread;

2. the internal drilling fluid flow channel is always in an open-circuit state when tripping in and tripping out, so that the phenomenon of drilling fluid flow channel blockage caused by the fact that the impactor stops working can be avoided, and the drilling fluid circulation flow channel is guaranteed to be smooth in the underground;

3. the invention can be used in combination with power drilling tools such as a turbine or a screw and the like, and increases the torsional impact load while not influencing the transmission of the torque and the rotating speed output by the power drilling tools.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a blank beating preventing type torsional impact tool according to an embodiment of the present invention;

FIG. 2 is a schematic cross-sectional view taken along section A-A of FIG. 1 according to an embodiment of the present invention;

FIG. 3 is a schematic cross-sectional view taken along section B-B of FIG. 1 according to an embodiment of the present invention;

FIG. 4 is a schematic cross-sectional view taken along section C-C of FIG. 1 in accordance with an embodiment of the present invention;

FIG. 5 is a schematic cross-sectional view taken along section D-D of FIG. 1 in accordance with an embodiment of the present invention;

FIG. 6 is a schematic cross-sectional view taken along section E-E of FIG. 1 in accordance with an embodiment of the present invention;

FIG. 7 is a schematic cross-sectional view taken along section F-F in FIG. 1 according to an embodiment of the present invention;

FIG. 8 is a schematic three-dimensional view of a shunt cover according to an embodiment of the present invention;

FIG. 9 is a schematic three-dimensional cross-sectional view of a nozzle base according to an embodiment of the present invention;

FIG. 10 is a schematic three-dimensional structure of a hammer base according to an embodiment of the present invention;

fig. 11 is a schematic diagram of a principle of a runaway prevention function of the runaway prevention type twisting and impacting tool provided by the embodiment of the invention;

FIG. 12 is a schematic cross-sectional view taken along section A-A of FIG. 1 according to a second embodiment of the present invention;

FIG. 13 is a schematic cross-sectional view taken along section B-B of FIG. 1 according to a second embodiment of the present invention;

FIG. 14 is a schematic cross-sectional view taken along section C-C of FIG. 1 according to a second embodiment of the present invention;

fig. 15 is a schematic cross-sectional view along the section D-D in fig. 1 according to the second embodiment of the present invention.

Wherein, 1 is an upper joint, 18 is a central liquid inlet channel, and 19 is an upper drainage cavity;

2 is a transmission joint; 3 is an upper shell; 4 is a semicircular card;

5 is a middle joint, 51 is an upper central flow passing channel, and 52 is an upper axial flow leakage channel;

6 is a float valve, 61 is an annular overflowing cavity; 62 is a radial overflowing hole, and 63 is a lower central overflowing channel;

7 is a lower shell, 71 is an annular drainage cavity;

8 is a spring; 9 is a valve seat, 91 is a lower axial leakage channel, and 92 is a radial leakage channel;

10 is a flow dividing cover, 101 is a radial flow dividing hole, and 102 is an axial liquid inlet hole;

11 is a commutator, 111 is a liquid inlet channel, 112 is a liquid discharge channel, and 113 is a reversing cavity;

12 is a pendulum bob, 121 is a first runner, and 122 is a second runner;

13 is a guide plate; 14 is a nozzle;

15 is a nozzle base, 151 is a liquid discharge hole, and 152 is a central liquid discharge cavity;

16 is a hammer seat, 161 is an impact cavity, 162 is a liquid inlet groove, 163 is a liquid outlet groove, and 164 is a drain hole;

and 17 is a transmission surface.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The idle-striking prevention type twisting and punching tool provided by the embodiment of the invention comprises an upper connector 1, a transmission shell, a clamping ring, a middle connector 5, a float valve 6, a lower shell 7, an elastic device, a valve seat 9 and a twisting and punching mechanism, wherein the twisting and punching mechanism is shown in figure 1;

the upper joint 1 and the transmission shell are in matched transmission through a transmission surface 17, the clamping ring is sleeved on the upper joint 1 and can move up and down relative to the transmission shell along with the upper joint, and the clamping ring can be hung upwards and leaned on the transmission shell; a central liquid inlet channel 18 is arranged in the upper joint 1; the structure of which can also be seen in fig. 11;

the middle joint 5 is fixedly connected with the transmission shell; an upper central runner 51 and an upper axial leakage runner 52 are arranged in the middle joint 5, and the upper axial leakage runner 52 is communicated with the inlet of the leakage runner of the valve seat 9; as shown in fig. 3;

at least under the condition that the clamping ring moves upwards to be hung on the transmission shell, an upper leakage cavity 19 is formed between the upper joint 1 and the middle joint 5, and the upper leakage cavity 19 is communicated with the central liquid inlet channel 18 and the upper axial leakage channel 52;

at least under the condition that the upper joint 1 moves downwards to contact the middle joint 5, the upper drainage cavity 19 is in a closed state, and the upper central overflow channel 51 is communicated with the central liquid inlet channel 18;

the lower shell 7 is fixedly connected with the middle joint 5, and the valve seat 9 and the twisting and punching mechanism are arranged in the lower shell 7;

the floating valve 6 and the elastic device are arranged in the valve seat 9, the elastic device can provide pre-tightening force towards the middle joint 5 for the floating valve 6, the pre-tightening force can enable the floating valve 6 to move towards the middle joint 5 when the pressure of drilling fluid borne by the floating valve 6 is smaller than a preset value, and the communication between the inlet of the flow passing structure of the floating valve 6 and the upper central flow passing channel 51 is cut off;

the outlet of the overflowing structure of the float valve 6 is communicated with a liquid inlet channel of the twisting and flushing mechanism so as to facilitate drilling operation; the outlet of the drainage channel of the valve seat 9 is communicated with the drainage cavity channel of the twisting and punching mechanism, and is suitable for tripping and tripping.

The working principle is as follows: when the idle-driving-prevention torsional impact tool works at the bottom of a well, under the action of drilling pressure, the lower end of an upper connector 1 is attached to the upper end of a middle connector 5, at the moment, an upper drainage cavity 19 is in a closed state, drilling fluid flows to an upper central overflow channel 51 from a central fluid inlet channel 18, a floating valve 6 can compress a spring 8 to move downwards under the action of the pressure of the drilling fluid, so that the upper central overflow channel 51 is communicated with an inlet of an overflow structure of the floating valve 6, the drilling fluid flows downwards to enter a fluid inlet cavity channel of a torsional impact mechanism, clockwise or anticlockwise torsional impact force is generated under the action of the drilling fluid, and the impact force is transmitted to a drill bit to realize dynamic rock breaking under the torsional impact state;

when the idle running prevention type torsional impact tool provided by the embodiment of the invention is used for drilling, under the action of self weight, the upper connector 1 drives the clamping ring (the semicircular clamp 4 can be used herein) to extend outwards relative to other parts of the tool to the upper end surface of the semicircular clamp 4 to be contacted with the transmission shell (the lower end surface of the transmission connector 2 can be used herein) and then stops, at the moment, the upper drainage cavity 19 is in an open state, most of drilling fluid in the central fluid inlet channel 18 on the upper connector 1 flows into the upper axial drainage channel 52 through the upper drainage cavity 19, and then flows downwards through the drainage channel on the valve seat 9 and finally reaches a drill bit; meanwhile, the flow rate of drilling fluid in the upper center flow passage 51 on the middle joint 5 is reduced originally, and then the pressure value is reduced, the floating valve 6 extends upwards into the middle joint 5 under the action of the pre-tightening force of the elastic device (here, the spring 8) to cut off the communication between the upper center flow passage 51 and the inlet of the flow passage structure of the floating valve 6, so that the torsional impact mechanism (such as the pendulum bob 12) is in a stop state, and the idle-run prevention function is realized, thereby avoiding the abnormal damage of torsional impact force to the whole tool connecting thread and the shell in the process of tripping, prolonging the service life of the tool, and reducing the risk of serious and complex accidents in the well.

Preferably, the transmission housing comprises a transmission joint 2 and an upper housing 3 which are fixedly connected, the upper joint 1 and the transmission joint 2 are in matched transmission through a transmission surface 17, the structure of the transmission housing can be shown in fig. 2, and the upper housing 3 is fixedly connected to the middle joint 5; the snap ring can move upwards to the upper end face to be hung on the lower end face of the transmission joint 2, and the inner side wall surface of the upper shell 3 is in contact fit with the outer circular surface of the snap ring. The split combined structure provided by the utility model is convenient for design, production, assembly and maintenance.

In this embodiment, the upper joint 1 and the middle joint 5 have a conical surface capable of fitting therebetween to achieve effective closing and opening of the upper leakage cavity 19 therebetween, and the structure thereof can be seen with reference to fig. 1 and 11, and the conical surface is large at the top and small at the bottom.

Specifically, the snap ring is composed of two semicircular clips 4, and is convenient to assemble in a ring groove at a corresponding position of the upper joint 1. Of course, the upper joint 1 and the snap ring may also be designed as an integral structure.

Preferably, the flow passing structure of the float valve 6 comprises a radial flow passing hole 62 and a lower central flow passing channel 63, an annular flow passing cavity 61 is formed between the float valve 6 and the valve seat 9, the radial flow passing hole 62 communicates the lower central flow passing channel 63 with the annular flow passing cavity 61, and the outlet of the lower central flow passing channel 63 is communicated with the liquid inlet channel of the twisting and punching mechanism, and the structure can be shown in fig. 4 to be matched with the upper central flow passing channel 51.

In this embodiment, the drain passage of the valve seat 9 includes a lower axial drain passage 91 and a radial drain passage 92, an inlet of the lower axial drain passage 91 is communicated with the upper axial drain passage 52, and an outlet is communicated with the drain passage of the twisting mechanism through the radial drain passage 92, and the structure thereof can be shown in fig. 4, 5 and 11 to be adapted to the upper axial drain passage 52. Further, the number of the upper axial leakage flow passages 52 is plural, and the upper axial leakage flow passages are uniformly distributed around the upper center through flow passage 51 along the circumference, the number of the lower axial leakage flow passages 91 is plural, the number of the lower axial leakage flow passages 91 is one-to-one corresponding to the upper axial leakage flow passages 52, and the number of the radial leakage flow passages 92 is plural, the number of the radial leakage flow passages is one-to-one corresponding to the lower axial leakage flow passages 91, so that the flowing mode of the.

Specifically, the twisting and punching mechanism comprises a commutator 11, a pendulum bob 12 and a hammer seat 16, as shown in fig. 1;

wherein, the hammer seat 16 is fixedly connected with the lower shell 7, the pendulum bob 12 is arranged in the hammer seat 16, and the commutator 11 is arranged in the pendulum bob 12 and can rotate;

the hammer base 16 is provided with a liquid inlet groove 162 and a liquid outlet groove 163, and the liquid inlet groove 162 is communicated with an outlet of the overflowing structure of the float valve 6;

an impact cavity 161 is formed between the hammer seat 16 and the pendulum bob 12, and the impact cavity 161 can push the pendulum bob 12 to rotate clockwise or counterclockwise relative to the hammer seat 16 through drilling fluid in the impact cavity 161;

the commutator 11 is provided with a liquid inlet channel 111 and a liquid outlet channel 112, the liquid inlet channel 111 is communicated with an outlet of the overflowing structure of the float valve 6, a reversing cavity 113 is formed between the commutator 11 and the pendulum bob 12, and the reversing cavity 113 can promote the relative rotation between the commutator 11 and the pendulum bob 12 through drilling fluid in the reversing cavity 113;

the pendulum bob 12 is provided with a first runner 121 and a second runner 122, the first runner 121 can realize the communication and the switching between the reversing cavity 113 and the liquid inlet groove 162 and the liquid outlet groove 163, and the second runner 122 can realize the communication and the switching between the impact cavity 161 and the liquid inlet groove 111 and the liquid outlet groove 112;

namely, the liquid inlet channel of the twisting and impacting mechanism comprises the liquid inlet groove 162 of the hammer seat 16 and the liquid inlet channel 111 of the commutator 11.

The working principle is as follows: when the idle-driving-prevention torsional impact tool provided by the embodiment of the invention works at the bottom of a well, part of drilling fluid flows to the fluid inlet groove 162 on the hammer base 16 and then flows into the reversing cavity 113 through the first flow passage 121, so that the reverser 11 and the pendulum bob 12 are driven to rotate relatively, and the impact cavity 161 is communicated with the fluid inlet channel 111 and the fluid discharge channel 112 through the second flow passage 122; a part of the drilling fluid flows into the impact cavity 161 through the fluid inlet channel 111 on the reverser 11 and the second fluid channel 122 on the pendulum bob 12, the pendulum bob 12 is pushed to rotate clockwise or counterclockwise, during the rotation process, due to the difference of the rotation speed between the pendulum bob 12 and the reverser 11, the drilling fluid in the reversing cavity 113 is squeezed to flow to the fluid discharge groove 163 through the first fluid channel 121, the reverser 11 is driven to rotate synchronously after the inner side wall surface of the pendulum bob 12 is contacted with the reverser 11, the drilling fluid in the impact cavity 161 in front of the rotation direction of the pendulum bob 12 flows into the fluid discharge channel 112 through the second fluid channel 122 under the squeezing effect and flows downwards, and then the drilling fluid and the drilling fluid in the fluid discharge groove 163 continuously flow downwards to the drill bit. In the whole movement process, the contact collision between the pendulum bob 12 and the hammer seat 16 generates clockwise or anticlockwise torsional impact force, and the clockwise or anticlockwise torsional impact force is transmitted to the drill bit to realize dynamic load rock breaking under the torsional impact state.

In order to further optimize the technical scheme, an annular leakage cavity 71 is formed between the hammer seat 16 and the lower shell 7, an outlet of a leakage channel of the valve seat 9 is communicated with the annular leakage cavity 71, the hammer seat 16 is also provided with a lower leakage hole 164, and the annular leakage cavity 71 is communicated with a through hole in the hammer seat 16 through the lower leakage hole 164; the structure forms a discharge cavity channel of the twisting and punching mechanism.

The idle-driving prevention type twisting and impacting tool further comprises a nozzle 14 arranged in the hammer seat 16, and the nozzle 14 is communicated with an outlet of the overflowing structure of the float valve 6. The drilling fluid passing through the floating valve 6 flow structure is divided into three parts, so that the flow mode of the drilling fluid in the tool is optimized, and the normal flow drilling operation is ensured.

The number of the impact chambers 161 is plural, and the impact chambers are respectively provided on both sides of the pendulum bob 12 in the circumferential direction, and can push the pendulum bob 12 to twist in the clockwise direction or the counterclockwise direction. In this embodiment, the plurality of striking chambers 161 are symmetrical about the central axis of pendulum 12, enabling balanced drilling fluid propulsion, where pendulum 12 is embodied as two symmetrical fan-shaped striking lobe structures. Similarly, the reversing chamber 113 is provided in plural numbers, and is respectively disposed at both sides of the circumference of the reverser 11 and the pendulum bob 12, and can cause the reverser 11 and the pendulum bob 12 to rotate relatively in the clockwise direction or the counterclockwise direction. Correspondingly, the liquid inlet channel 111, the liquid outlet channel 112, the first runner 121, the second runner 122, the liquid inlet groove 162 and the liquid outlet groove 163 are uniformly distributed in a plurality along the circumferential direction.

Preferably, the torsional impact mechanism further comprises a flow dividing cover 10, the flow dividing cover 10 is provided with a radial flow dividing hole 101 and a plurality of axial liquid inlet holes 102 communicated with the radial flow dividing hole, the number of the liquid inlet grooves 162 is a plurality corresponding to that of the axial liquid inlet holes 102, so as to optimize the flow mode of the drilling fluid in the tool and improve the torsional impact effect, and the structure of the torsional impact mechanism can be shown in fig. 6, 7 and 8. Further, the axial liquid inlet holes 102 and the liquid inlet grooves 162 are uniformly distributed along the circumferential direction.

The present solution is further described below with reference to specific embodiments: