阅读说明：本技术 一种井下气相空间旋转摆动钻井工具及实现方法 (Downhole gas phase space rotating and swinging drilling tool and implementation method ) 是由 金冰兰 于 2019-12-05 设计创作，主要内容包括：本发明涉及一种钻井用气相空间旋转摆动钻井工具及泥浆导出方法,包括分液盖、分液轮、透平、耦合筒、磁力耦合转子、耦合内轴、摆锤筒、摆锤、回流接头、外筒、下接头,安装在钻头和钻铤之间,钻井内泥浆自泥浆进口进入,经分液盖和分液轮的导流冲击在透平上,透平快速转动,磁力耦合转子驱动耦合内轴同步旋转,耦合内轴与摆锤筒内的摆锤相连,将旋转力传递到摆锤高速旋转,使钻井泥浆沿外筒与摆锤筒之间的环形空间到回流接头,通过回流接头的孔洞流入下接头内,导入下一部分钻具内,效果是减少了钻井拖压和粘滑,提高钻井效率并减少卡钻事故,同时不对已有钻井系统做任何改造就能使用。(The invention relates to a gas phase space rotating and swinging drilling tool for drilling and a mud guiding method, which comprises a liquid separating cover, a liquid separating wheel, a turbine, a coupling cylinder, a magnetic coupling rotor, a coupling inner shaft, a pendulum hammer cylinder, a pendulum hammer, a backflow joint, an outer cylinder and a lower joint, wherein the liquid separating cover, the liquid separating wheel, the turbine, the coupling cylinder, the pendulum hammer cylinder, the backflow joint, the outer cylinder and the lower joint are arranged between a drill bit and a drill collar, mud in drilling enters from a mud inlet, is impacted on the turbine through the flow guide of the liquid separating cover and the liquid separating wheel, the turbine rotates rapidly, the magnetic coupling rotor drives the coupling inner shaft to rotate synchronously, the coupling inner shaft is connected with the pendulum hammer in the pendulum hammer cylinder, and the rotating force is transmitted to, the hole through the backflow connector flows into the lower connector and is guided into the next part of drilling tool, so that the dragging pressure and stick slip of the drilling tool are reduced, the drilling efficiency is improved, the drilling accident is reduced, and the drilling tool can be used without any modification of the conventional drilling system.)

1. The utility model provides a rotatory swing drilling tool in gaseous phase space in pit, includes mud import (1), divides liquid lid (2), divides liquid wheel (3), turbine (4), a coupling section of thick bamboo (5), magnetic coupling rotor (6), shaft (7) in the coupling, pendulum hammer section of thick bamboo (8), pendulum (9), backflow joint (10), urceolus (11), lower clutch (12), its characterized in that: the liquid separating wheel (3) is sequentially connected to an external thread (5-1) on the upper part of the coupling cylinder (5) through an internal thread (3-1) and the liquid separating cover (2) through an internal thread (2-1), the liquid separating cover (2) is tightly pressed on the upper end surface of the liquid separating wheel (3), an outer ring of a magnetic coupling rotor bearing (6-2) is clamped in the magnetic coupling rotor (6), an inner ring is fixed on a clamping shaft (5-2) of the coupling cylinder (5), the turbine (4) is connected with the internal thread on the upper part of the magnetic coupling rotor (6) through the external thread (4-1) on the lower part, an external coupling magnet (6-1) is embedded at the lower part of an inner cylinder of the magnetic coupling rotor (6), an internal coupling magnet (7-5) is embedded outside the coupling inner shaft (7), and an upper shaft (7-3) of the coupling inner shaft (7) is fixed at the upper end of the, a lower shaft (7-4) of the coupling inner shaft (7) is fixed at the lower end of the coupling cylinder (5) through a lower bearing (7-2), the upper end surface of a pendulum bob main shaft (9-9) is hinged with the lower end surface of the coupling inner shaft (7), an inner ring of a pendulum bob upper bearing (9-1) is clamped on a pendulum bob upper shaft (9-3), an outer ring of the pendulum bob upper bearing (9-1) is clamped in a pendulum bob cylinder (8), an inner ring of the pendulum bob lower bearing (9-2) is clamped on the pendulum bob lower shaft (9-4), an outer ring of the pendulum bob lower bearing (9-2) is clamped at the upper part of an inner hole of a backflow connector (10), bearings (9-6) are fixed in pendulum bob holes (9-4) of the pendulum bob (9), two pendulum bob (9) are fixed on one side surface of the pendulum bob main shaft (9-9) through two pendulum bob shafts (9-5), and the pendulum bob (9-6) is utilized to enable the pendulum bob (9) to rotate around the pendulum bob sub shaft, the external thread (8-1) at the upper end of the pendulum cylinder (8) is connected with the internal thread (5-3) at the lower part of the coupling cylinder (5); the internal thread (8-2) at the lower part of the pendulum hammer barrel (8) is connected with the upper thread (10-1) of the backflow joint (10), and the external thread (10-2) at the lower part of the backflow joint is connected with the internal thread of the lower joint (12); the inner circular surface of the upper end of the outer cylinder (11) is provided with a screw thread which is a slurry inlet (1), the lower end of the outer cylinder is provided with a lower screw thread (11-2), the outer cylinder (11) is sleeved outside the coupling cylinder (5), and an upper external screw thread (12-1) of the lower joint (12) is screwed with the lower screw thread (11-2) in the outer cylinder (11); the lower thread (12-2) of the lower joint (12) is connected with an external drilling tool, and the slurry inlet (1) is connected with the external drilling tool.

2. The method for realizing the gas phase space rotating and swinging well drilling tool in the well as the method, as claimed in claim 1, is characterized in that: the implementation method comprises the steps that slurry in a drilling well enters from a slurry inlet (1), impacts on a turbine (4) after the slurry is guided by a separating cover (2) and a separating wheel (3), the turbine (4) rotates under the impact of the drilling slurry and drives a magnetic coupling rotor (6) to rotate rapidly, the magnetic coupling rotor (6) drives a coupling inner shaft (7) in a coupling cylinder (5) to rotate synchronously through the magnetic coupling effect, the coupling inner shaft (7) is connected with a pendulum bob (9) in a pendulum bob cylinder (8), the rotating force is finally transmitted to the pendulum bob (9), and the pendulum bob (9) is driven to rotate, so that the transmission of kinetic energy is realized, and the pendulum bob (9) is located in a cavity of the pendulum bob cylinder (8), isolated from the drilling slurry and moves in a gas phase space, so that high-speed rotation is realized; meanwhile, the pendulum bob main shaft (9-10) drives the pendulum bob (9) to continuously rotate at a high speed, and the pendulum bob (9) is positioned on one side of the pendulum bob main shaft (9-10) to generate radial vibration, so that the friction force between a drilling pipe column system and a well wall and mud is reduced, and the dragging pressure of drilling is reduced; when the pendulum bob (9) rotates around the pendulum bob sub-shaft (9-5), the pendulum bob is vibrated to generate high-frequency impact on a drill bit, so that the stick-slip of a drilling well is reduced; meanwhile, the magnetic coupling rotor (6) and the coupling inner shaft (7) in the liquid phase space are spatially separated by the coupling cylinder (5), so that the coupling inner shaft (7) and other connected components move in the gas phase space; finally, the drilling mud flows along the annular space between the outer barrel (11) and the pendulum barrel (8) to the return connection (10), flows through the bore of the return connection (10) into the lower connection (12) and is conducted into the next section of the drilling tool.

Technical Field

The invention relates to a drilling tool, in particular to a downhole gas phase space rotating and swinging drilling tool and an implementation method.

Background

At present, two major factors affecting the drilling efficiency are the stick-slip of the drilled well, and the movement of the PDC bit is extremely disordered in the downhole, including the transverse, longitudinal and torsional vibrations and the combination of these vibrations. PDC bits are capable of continuously fracturing sheared formations under normal drilling conditions. When a PDC bit is used to drill hard, consolidated formations, there is typically not enough torque to break up the formation, thereby causing the bit to momentarily stop rotating. At this point, torque energy begins to build up in the drill string. The drill string can wind up like a spring and once the torque required to shear the fractured formation is reached, the torque energy in the drill string is suddenly released. The drill bit will break the rock at a higher rotational speed than a normal drill bit. This violent change motion is referred to as a "stick and slip" phenomenon. This phenomenon can lead to premature bit failure, shortened lower tool life, and affect the rate of penetration. As the depth of the well increases, the hardness and plasticity of the rock increases, the drillability deteriorates, and the rate of penetration decreases. The field drilling data indicates that the average rate of penetration for the deep wellbore section is only 15-30% of the average rate of penetration for its upper wellbore section, some areas even being below 8%. Studies have shown that "stick-slip" is one of the important causes of reduced rate of penetration. And secondly, well drilling dragging pressure, wherein the pressure generated in the process of directional drilling in a vertical well reverse buckling or multiple reverse buckling of a directional well and the process of directional drilling in a horizontal well hardly transfers the pressure to a drill bit after the drilling tool is pressurized due to a well track and various resistances. The comprehensive logging instrument and the weight indicator show that the position of the drill bit is unchanged, no drilling footage is carried out, the pump pressure is not increased, the pump is not held back on the premise that the bit pressure is continuously increased, and the pump may be suddenly held back on the premise that the bit pressure is continuously increased. On one hand, the normal directional construction is influenced by the dragging and pressing, the drilling speed is reduced, the drilling footage is reduced, and on the other hand, the drill jamming is easy to generate if the operation is improper.

The current drilling tools cannot simultaneously and efficiently solve the problems of dragging pressure and stick slip, so that a novel drilling acceleration tool needs to be designed to achieve the aim.

Disclosure of Invention

In view of the problems in the prior art, the invention provides a downhole gas phase space rotating and swinging drilling tool and an implementation method thereof. The specific technical scheme is that the rotary swinging drilling tool for the underground gas phase space comprises a liquid separating cover, a liquid separating wheel, a turbine, a coupling cylinder, a magnetic coupling rotor, a coupling inner shaft, a pendulum hammer cylinder, a pendulum hammer, a backflow joint, an outer cylinder and a lower joint, and is characterized in that: the liquid separating wheel is sequentially connected to an external thread on the upper part of the coupling cylinder through an internal thread and a liquid separating cover through an internal thread, the liquid separating cover is tightly pressed on the upper end surface of the liquid separating wheel, an outer ring of a bearing of the magnetic coupling rotor is clamped in the magnetic coupling rotor, an inner ring is fixed on a clamping shaft of the coupling cylinder, the turbine is connected with the internal thread on the upper part of the magnetic coupling rotor through the external thread on the lower part, an external coupling magnet is embedded at the lower part of an inner cylinder of the magnetic coupling rotor, an internal coupling magnet is embedded outside an inner coupling shaft, an upper shaft of the inner coupling shaft is fixed at the upper end of the coupling cylinder through a bearing, a lower shaft of the inner coupling shaft is fixed at the lower end of the coupling cylinder through a lower bearing, the upper end surface of a main shaft of the pendulum is hinged with the lower end surface of the inner coupling shaft, an inner ring of a bearing of the, pendulum hammer holes of pendulum hammers) are internally fixed with bearings, the two pendulum hammers are fixed on one side surface of a pendulum hammer main shaft through two pendulum hammer shafts, the pendulum hammers rotate around the pendulum hammer sub-shafts by utilizing the bearings, and external threads at the upper end of a pendulum hammer cylinder are connected with internal threads at the lower part of a coupling cylinder; the internal thread at the lower part of the pendulum cylinder is connected with the upper thread of the backflow joint, and the external thread at the lower part of the backflow joint is connected with the internal thread of the lower joint; the inner circular surface of the upper end of the outer cylinder is provided with threads which are used as a slurry inlet, the lower end of the outer cylinder is provided with lower threads, the outer cylinder is sleeved outside the coupling cylinder, and the external threads on the upper part of the lower joint are screwed with the lower threads in the outer cylinder; the lower part of the lower joint is connected with an external drilling tool through threads, and the slurry inlet is connected with the external drilling tool.

The implementation method is that the mud in the drilling well enters from a mud inlet, and impacts on the turbine after the diversion of the liquid dividing cover and the liquid dividing wheel, the turbine improves the rotating speed under the impact of the drilling mud and drives the magnetic coupling rotor to rotate rapidly, the magnetic coupling rotor drives the coupling inner shaft in the coupling cylinder to rotate synchronously through the magnetic coupling effect, the coupling inner shaft is connected with the pendulum bob in the pendulum hammer cylinder, the rotating force is finally transmitted to the pendulum bob to drive the pendulum bob to rotate, so that the transmission of the kinetic energy is realized, and the pendulum bob is positioned in the cavity of the pendulum hammer cylinder, is isolated from the drilling mud and moves in a gas phase space, so that the high-speed rotation is realized; meanwhile, the pendulum bob main shaft drives the pendulum bob to continuously rotate at a high speed, and the pendulum bob is positioned on one side of the pendulum bob main shaft to generate radial vibration, so that the friction force between a drilling pipe column system and a well wall and mud is reduced, and the drag pressure of drilling is reduced; when the pendulum bob rotates around the pendulum bob sub-shaft, the pendulum bob is vibrated to generate high-frequency impact on the drill bit, so that the stick-slip of the drilling well is reduced; meanwhile, the magnetic coupling rotor and the coupling inner shaft which are positioned in the liquid phase space are separated from each other by the coupling cylinder in space, so that the coupling inner shaft and other connected components move in the gas phase space; finally, the drilling mud flows along the annular space between the outer barrel and the pendulum barrel to the return sub, flows into the lower sub through the bore of the return sub, and is directed into the next section of the drilling tool.

The high-speed rotating pendulum bob has the advantages that the mud drives the turbine to rotate, the turbine transmits power to the pendulum bob in the pendulum bob barrel through magnetic coupling, the pendulum bob rotates in a gas phase space, and radial vibration and impact are generated by utilizing the pendulum bob rotating at a high speed, so that the friction force between a drilling string system and a well wall and mud is reduced, and drag pressure is reduced; on the other hand, the high frequency impact reduces the well stick-slip. Can be installed after the drill bit and used without any modification to the existing drilling system.

Drawings

FIG. 1 is a structural cross-sectional view of the present invention;

fig. 2 is an exploded view of the present invention.

Detailed Description

As shown in figures 1 and 2, the downhole gas phase space rotary swing drilling tool comprises a slurry inlet 1, a liquid separation cover 2, a liquid separation wheel 3, a turbine 4, a coupling cylinder 5, a magnetic coupling rotor 6, a coupling inner shaft 7, a pendulum cylinder 8, a pendulum 9, a return joint 10, an outer cylinder 11 and a lower joint 12.

The liquid separating wheel 3 is sequentially connected to an external thread 5-1 on the upper part of the coupling cylinder 5 through an internal thread 3-1 and the liquid separating cover 2 is tightly pressed on the upper end face of the liquid separating wheel 3 through an internal thread 2-1, an outer ring of a magnetic coupling rotor bearing 6-2 is clamped in the magnetic coupling rotor 6, an inner ring is fixed on a clamping shaft 5-2 of the coupling cylinder 5, the turbine 4 is connected with an internal thread on the upper part of the magnetic coupling rotor 6 through a lower external thread 4-1, an external coupling magnet 6-1 is embedded at the lower part of an inner cylinder of the magnetic coupling rotor 6, an internal coupling magnet 7-5 is embedded outside the coupling inner shaft 7, an upper shaft 7-3 of the coupling inner shaft 7 is fixed on the upper end of the coupling cylinder 5 through a bearing 7-1, a lower shaft 7-4 of the coupling inner shaft 7 is fixed at the lower end of the coupling cylinder 5 through a lower bearing, an inner ring of an upper pendulum bob bearing 9-1 is clamped on an upper pendulum bob shaft 9-3, an outer ring of the upper pendulum bob bearing 9-1 is clamped in a pendulum bob barrel 8, an inner ring of a lower pendulum bob bearing 9-2 is clamped on a lower pendulum bob shaft 9-4, an outer ring of the lower pendulum bob bearing 9-2 is clamped on the upper part of an inner hole of a backflow connector 10, a bearing 9-6 is fixed in a pendulum bob hole 9-4 of the pendulum bob 9, the two pendulum bob 9 are fixed on one side surface of a pendulum bob main shaft 9-9 through two pendulum bob shafts 9-5, the pendulum bob 9 rotates around the pendulum bob sub-shaft 9-5 by utilizing the bearing 9-6, and an external thread 8-1 at the upper end of the pendulum bob barrel 8 is connected with an internal thread 5-3 at the lower; the internal thread 8-2 at the lower part of the pendulum cylinder 8 is connected with the upper thread 10-1 of the backflow joint 10, and the external thread 10-2 at the lower part of the backflow joint is connected with the internal thread of the lower joint 12; the inner circular surface of the upper end of the outer cylinder 11 is provided with a screw thread which is a slurry inlet 1, the lower end of the outer cylinder is provided with a lower screw thread 11-2, the outer cylinder 11 is sleeved outside the coupling cylinder 5, and an upper external screw thread 12-1 of the lower joint 12 is screwed with the lower screw thread 11-2 in the outer cylinder 11; the lower thread 12-2 of the lower joint 12 is connected with an external drilling tool, and the mud inlet 1 is connected with the external drilling tool.

The method is characterized in that:

1. the kinetic energy of the mud is converted into the rotary kinetic energy of the pendulum bob by the turbine, and the mud flowing at high speed in the drill rod drives the turbine to rotate, so that a stable power source is provided for the gas phase space rotary swing drilling tool, and the pendulum bob rotates at high speed.

2. The magnetic coupling is utilized to transmit power, and because the vibration acceleration of the drill bit at the well bottom is large, the directly connected transmission shaft can deform or fatigue fracture under the action of the acceleration, and the magnetic coupling is utilized to transmit power, so that the influence of vibration on a transmission system is overcome, and the reliability is high.

3. The pendulum bob rotating at a high speed reduces dragging pressure and stick slip, and the radial vibration generated by the pendulum bob rotating at a high speed reduces the friction force between a drilling string system and a well wall and mud, so that the dragging pressure is reduced; the pendulum bob can also rotate around the pendulum hammer shaft to generate high-frequency impact on the drill bit, so that the stick-slip of the drilling well is reduced.

4. The pendulum bob moves in a gas phase space, and the magnetic coupling rotor and the coupling inner shaft which are positioned in a liquid phase space are separated from each other in space by the coupling cylinder, so that the coupling inner shaft and other connected components are positioned in a cavity of the pendulum bob cylinder, isolated from drilling mud and move in the gas phase space, and high-speed rotation is realized.

5. The device adopts threaded connection, can be installed behind a drill bit, and can be used without modifying the existing drilling system.