Stroke-type torsion impact power tools

Abstract

The present invention belongs to the technical field of petroleum equipment, and specifically relates to a stroke-type torsional impact power tool, including a compression-rotation power assembly and a power output recovery assembly; the upper part of the stroke-type torsional impact power tool is connected to a pipe string, and the lower part is connected to functional components to achieve power output under different demand environments; the stroke-type torsional impact power tool realizes the allocation and control of pressure difference changes through the design of upper and lower valve ports, and then converts the pressure difference changes into the kinetic energy of unidirectional torsional impact and axial impact. The present invention effectively achieves stable power output of torsional impact power, solves the problem of short life of existing power tools due to wear and leakage, and the tool is effectively used for power output in underground environments such as well wall repair that require external power. The present invention provides a power output tool with torsional impact and axial impact, which effectively improves the power output efficiency. The research and development of this tool is of great significance to the field of petroleum equipment.

Description

Technical Field

[0001] The invention belongs to the technical field of petroleum equipment, and in particular relates to a stroke-type torsional impact power tool for providing power and accompanied by axial vibration and torsional impact. Background Art

[0002] With the continuous growth of global energy demand, the extraction of oil and natural gas has become increasingly important. Common types of power tools in the existing industry include screw drills, turbine drills, and electric drills. Each of these power tools has its own advantages and disadvantages, and the research and application of each type of power tool varies. For example, the operating torque of a screw motor is related to pressure drop and structure, not speed, but it has lateral vibration, requiring a universal joint to maintain smooth power output. While turbo drills have advantages such as high speed and no lateral vibration, their high output drilling speed and insufficient torque usually require a reduction mechanism to meet usage requirements. Electric drills have a high output drilling speed, a complex multi-stage reduction structure, poor reliability, and high insulation and sealing performance requirements for downhole motors. Therefore, it is necessary to develop a power tool that provides stable power, has a reliable structure, and has a wide range of applications.

[0003] For the reasons mentioned above, the development of a stroke-type torsional impact power tool for use in the field of petroleum equipment is of great significance. The stroke-type torsional impact power tool uses high-pressure liquid to output torsional impact power, while also generating an axial vibration. This can play different roles in different application scenarios. For example, installing it underground can reduce friction and drag during drilling and weaken the stick-slip effect. Using it in pipelines with severe sulfur accumulation and connecting a desulfurization scraper can effectively clean the pipeline. Due to its unique structure and working principle, the tool can be made of all metal and can be used in high-temperature underground environments, making up for the shortcomings of existing power tools. Summary of the Invention

[0004] The purpose of the present invention is to provide a stroke-type torsional impact power tool to solve the problems existing in the power tools described in the background art and to expand the scope of application of the tool. The technical solution of the present invention is: a single-stroke torsional impact power assembly, characterized in that: the stroke-type torsional impact power tool is located between the upper pipe string and the lower tool assembly, and includes a pressure-rotation power assembly and a power output recovery assembly: the pressure-rotation power assembly includes a lower valve disc, a valve core shaft, a pressure spring, a lower pressure seat, a torsional impact cylinder, an upper pressure cylinder seat, an upper valve disc, an upper thrust ball bearing, and an inlet pressure cover;

[0005] The power output recovery assembly includes an upper joint, a stroke body housing, a lower housing, a lower sealing head, a lower rotary joint, and a lower thrust ball bearing; the interior of the stroke body housing is designed with a spline groove that matches the torsional impact cylinder, and the lower rotary joint is connected to the target actuator through a thread; the valve core shaft and the lower rotary joint are connected through a thread; the lower sealing head and the lower rotary joint form a seal between the internal and external environment of the tool.

[0006] The outer surface of the torsional impact cylinder is designed with splines, and the inside of the stroke body shell is provided with a spline groove for axial movement of the torsional impact cylinder, and the main body of the pressure-rotation power assembly can only move axially in the device; when the upper valve formed by the upper valve disc and the upper pressure cylinder seat is closed and the lower valve formed by the lower valve disc and the valve core shaft is open, under the action of the high-pressure fluid in the pipe column, the main body of the pressure-rotation power assembly is pressed downward, the pressure-bearing spring is compressed, and the valve core shaft is twisted under the action of the trajectory interval formed between the upper pressure cylinder seat and the lower pressure seat. Thus, the torque is transmitted from the valve core shaft to the lower rotary joint through the spline connection; the upper pressure cylinder seat cooperates with the upper valve disc to form the upper valve, and the lower valve disc cooperates with the valve core shaft to form the lower valve; there is a phase difference between the upper valve and the lower valve, that is, when the upper valve is "open", the lower valve is "closed", and when the upper valve is "closed", the lower valve is "open"; under the switching cooperation of the upper valve and the lower valve, the lower rotary joint and the valve core shaft rotate under the action of the pressure-rotation power assembly, and the pressure-rotation rotates for one stroke, and the lower rotary joint and the valve core shaft rotate, and rotate one circle in four strokes; during the entire movement process, the pressure-rotation power assembly generates axial vibration in the outer shell, and generates torsional impact during rotation.

[0007] When the upper valve formed by the upper valve disc and the upper pressure cylinder seat changes from closed to open, and the lower valve formed by the lower valve disc and the valve core shaft changes from open to closed, the pressures in the upper and lower cavities of the pressure-rotation power assembly reach consistency, and under the dual action of the pressure-bearing spring and the water hammer effect, the pressure-rotation power assembly moves upward, while continuing to drive the lower components to twist;

[0008] Compared with the prior art, the present invention has the following beneficial effects: (1) Compared with traditional power tools, the power output by the present invention is a power source with torsional impact, accompanied by axial vibration; (2) Relying on the unique structural design of the present invention, the entire structure can be made of metal, and can be used as an all-metal power drill, which can adapt to the harsh environment of high temperature and high pressure; (3) When the present invention is in use, it also causes the drilling pressure to fluctuate, and under the bidirectional coupling effect of axial and circumferential directions, the operating efficiency is greatly improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 This is a schematic structural diagram of the stroke-type torsional impact power tool of the present invention;

[0010] Figure 1The names of the parts are: 1-upper joint, 2-stroke body housing, 3-lower housing, 4-lower sealing head, 5-lower rotary joint, 6-lower thrust ball bearing, 7-lower valve disc, 8-valve core shaft, 9-pressure spring, 10-lower pressure seat, 11-torsion impact cylinder, 12-upper pressure cylinder seat, 13-upper valve disc, 14-upper thrust ball bearing, 15-inlet gland;

[0011] Figure 2 AA sectional view of the stroke-type torsional impact power tool of the present invention;

[0012] Figure 3 This is an axonometric view of the main components of the compression-rotation powertrain of the present invention;

[0013] Figure 4 This is an axonometric view of the lower pressing seat and the upper pressing cylinder seat according to the present invention;

[0014] Figure 5 This is an axonometric view of the upper valve disc of the present invention;

[0015] Figure 6 This is an axonometric view of the valve core shaft described in the present invention. DETAILED DESCRIPTION

[0016] The present invention will be further described in detail below with reference to the embodiments and accompanying drawings.

[0017] In order to make the characteristics, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the invention claimed, but merely represents selected embodiments of the present invention.

[0018] See also Figure 1 The technical solution of the present invention is: a stroke-type torsional impact power tool, characterized in that: the stroke-type torsional impact power tool is connected between the upper drill string and the lower working tool, and includes a pressure-rotation power assembly and a power output recovery assembly; the pressure-rotation power assembly includes a lower valve disc 7, a valve core shaft 8, a pressure spring 9, a lower pressure seat 10, a torsional impact cylinder 11, an upper pressure cylinder seat 12, an upper valve disc 13, an upper thrust ball bearing 14, and an inlet pressure cover 15; the outer cylinder surface of the torsional impact cylinder 9 is designed with a spline, and the pressure-rotation power assembly body can only move axially in the device.

[0019] See also Figure 2, which is the AA sectional view of the present invention, the upper pressure cylinder seat 12 cooperates with the upper valve disc 13 to form the upper valve, and the lower valve disc 7 cooperates with the valve core shaft 8 to form the lower valve; when the upper valve is "open", the lower valve is "closed", and when the upper valve is "closed", the lower valve is "open".

[0020] See also Figure 3 With attached Figure 4 The top protrusion of the inlet pressure cover 15 is hexagonal, which facilitates the connection between the inlet pressure cover 15 and the torsional impact cylinder. The inlet pressure cover 15 is connected to the torsional impact cylinder 11 through a thread, and the upper thrust ball bearing 14 is used to achieve a tight seal between the upper pressure cylinder seat 12 and the upper valve disc 13; the lower pressure seat 10 and the upper pressure cylinder seat 12 are fixed to the torsional impact cylinder 11 with 4 circumferentially evenly distributed screws, and a movement range of two raised cylinders 801 on the valve core shaft 8 is formed between the lower pressure seat 10 and the upper pressure cylinder seat.

[0021] See also Figure 5 The feature below the upper valve disc 13 is for sliding splines 1301, which outputs torque while achieving the up and down movement of the compression-rotation power assembly, ensuring the logical switching of the tool "on" and "off", thereby realizing the power output of the tool.

[0022] The power output recovery assembly includes an upper joint 1, a stroke body housing 2, a lower housing 3, a lower sealing head 4, a lower rotary joint 5, and a lower thrust ball bearing 6. The stroke body housing 2 is internally designed with a spline groove that cooperates with a torsional impact cylinder 9. The lower rotary joint 5 is connected to the target actuator via a thread. The valve core shaft 8 is connected to the lower rotary joint 5 via a thread.

[0023] In a specific embodiment, the upper part of the stroke-type torsional impact power tool is connected to the upper tubing string, and the lower part is connected to the working tool or the lower tubing string. The initial state of the tool is that the upper valve is closed and the lower valve is open. The high-pressure fluid flows into the internal annulus of the compression-rotation power assembly from the opening of the inlet pressure cover 15. Since the upper valve composed of the upper valve disc 13 and the upper pressure cylinder seat 12 is closed, the lower valve composed of the lower valve disc 7 and the valve core shaft 8 is opened. Under the action of the upper pressure, the compression-rotation power assembly is pressed down as a whole, and the valve core shaft 8 produces under the action of the lower pressure seat 10, the upper pressure cylinder seat 12 and the cylinder 801. The torque is generated; the torque is transmitted to the upper valve disc 13 through the spline groove 1301 of the sliding spline 802, and is then transmitted to the working tool or the lower tubing string through the lower rotary joint 5; the pressure-rotating power assembly compresses the pressure spring 9 while moving downward. When the upper valve disc 13 and the upper pressure cylinder seat 12 form an open valve, and the lower valve formed between the lower valve disc 7 and the valve core shaft 8 is suddenly closed, a large amount of high-pressure fluid rushes into the lower space of the pressure-rotating power assembly. Under the dual action of negative pressure and the pressure spring 9, the pressure-rotating power assembly moves upward, while the power source continues to output. Thus, according to the above-mentioned working process, the cycle repeats, and a high-pressure fluid-driven power tool with torsional impact is formed. The output torsional impact power provides operational support for the working tool or the lower tubing string. If used in the drilling process, while providing torsional power, it also has torsional impact and axial impact, achieving the effects of reducing friction and drag and preventing stick-slip.

Claims

1. Stroke-type torsion impact power tool, characterized by: The stroke-type torsional impact power tool is located between the upper tubing string and the lower tool assembly, and includes a compression-rotation power assembly and a power output recovery assembly: The pressure-rotation power assembly comprises a lower valve disc (7), a valve core shaft (8), a pressure spring (9), a lower pressure seat (10), a torsion impact cylinder (11), an upper pressure cylinder seat (12), an upper valve disc (13), an upper thrust ball bearing (14), and an inlet pressure cover (15); a spline is designed on the outer surface of the torsion impact cylinder (9), and the main body of the pressure-rotation power assembly can only move axially in the stroke body housing (2); The power output recovery assembly comprises an upper joint (1), a stroke body housing (2), a lower housing (3), a lower sealing head (4), a lower rotary joint (5), and a lower thrust ball bearing (6); a spline groove is designed inside the stroke body housing (2) to match the torsion impact cylinder (9); the lower rotary joint (5) is connected to the target actuator through a thread; the valve core shaft (8) is connected to the lower rotary joint (5) through a thread; The upper pressure cylinder seat (12) cooperates with the upper valve disc (13) to form an upper valve, and the lower valve disc (7) cooperates with the valve core shaft (8) to form a lower valve; there is a phase difference between the upper valve and the lower valve, that is, when the upper valve is "open", the lower valve is "closed", and when the upper valve is "closed", the lower valve is "open"; under the switching cooperation of the upper valve and the lower valve, the lower rotary joint (5) and the valve core shaft (8) rotate under the action of the pressure-rotation power assembly, and the pressure-rotation is one stroke, and the lower rotary joint (5) and the valve core shaft (8) rotate, and rotate one circle under four strokes; during the entire movement process, the pressure-rotation power assembly generates axial vibration in the housing, and generates torsional impact during rotation; The lower pressure seat (10) and the upper pressure cylinder seat (12) both have four circumferentially evenly distributed threaded countersunk holes, which are fixedly connected to the torsion impact cylinder (11) by screws. The lower pressure seat (10) and the upper cylinder pressure seat (12) cooperate to form a unique motion range, and the upper valve disc (13) is driven to rotate by the pressure-rotation power assembly, thereby driving the valve core shaft (8) and the lower rotary joint (5) to rotate; two cylinders are designed on the valve core shaft (8), which move between the lower pressure seat (10) and the upper pressure cylinder seat (12); under the action of the lower pressure seat (10), the upper pressure cylinder seat (12) and the cylinder (801), the valve core shaft (8) generates a torsional force.

2. The stroke-type torsional impact power tool according to claim 1, characterized in that: The inner hole of the upper joint (1) is smaller than the stroke body shell (2), and the axial movement distance of the pressure-rotation power assembly is limited; the inlet pressure cover (15) and the torsion impact cylinder (11) in the pressure-rotation power assembly are connected by threads, and the upper valve disc (13) is pressed against the upper pressure cylinder seat (12) through the upper thrust ball bearing (14) to achieve relative sealing of the valve port; the upper valve disc (13) is designed with a spline (1301) for sliding, which cooperates with the spline groove (802) of the inner cylinder wall of the valve core shaft (8).

3. The stroke-type torsional impact power tool according to claim 1, characterized in that: The upper end of the lower housing (3) is provided with a spline groove, and the lower valve disc (7) is connected to the lower housing (3) via a spline to achieve circumferential fixation, and the lower valve disc (7) is axially limited by the lower end of the joint of the stroke body housing (2); the outer diameter of the lower shaft of the valve core shaft (8) is slightly smaller than the lower valve disc (7).

4. The stroke-type torsional impact power tool according to claim 1, characterized in that: The lower pressure seat (10), the torsional impact cylinder (11), the upper pressure cylinder seat (12), the upper valve disc (13), the upper thrust ball bearing (14), and the inlet pressure cover (15) move axially under the action of the fluid; the upper valve disc (13), the valve core shaft (8), and the lower rotary joint (5) rotate under the action of the pressure-rotation power assembly.

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