CN-115874934-B - Turbine type oscillation impactor

Abstract

The invention provides a turbine type oscillation impactor, which belongs to the technical field of oil and gas exploration and development, and comprises an outer shell, a transmission mandrel arranged in the outer shell, a cam impact mechanism arranged at the upper end of the transmission mandrel, and a throttle valve port arranged on the cam impact mechanism, wherein the cam impact mechanism periodically stretches when the transmission mandrel rotates, and the size of the throttle valve port periodically changes when the cam impact mechanism stretches. The invention can stably generate oscillation, is suitable for environments such as ultra-deep horizontal wells and the like, and can avoid erosion of the valve group.

Inventors

• XUAN LINGCHAO
• MA GUANGJUN
• ZANG YANBIN
• WANG JIACHANG
• ZHANG HONGNING
• ZHANG HAIPING
• WANG HENG

Assignees

• 中国石油化工股份有限公司
• 中国石油化工股份有限公司石油工程技术研究院

Dates

Publication Date

20260512

Application Date

20210928

Claims (7)

1. 1. A turbine type oscillating impactor comprising: an upper joint (11) is arranged at the upper end of the outer shell (1); A transmission mandrel (2) arranged in the outer shell (1), wherein the transmission mandrel (2) rotates under the action of fluid, a turbine rotating mechanism (21) is arranged outside the transmission mandrel (2), the turbine rotating mechanism (21) drives the transmission mandrel (2) to rotate under the action of fluid, and The cam impact mechanism (3) is arranged at the upper end of the transmission mandrel (2), and the cam impact mechanism (3) generates periodic expansion and contraction when the transmission mandrel (2) rotates; the cam impact mechanism (3) is provided with a throttle valve port (35), and the size of the throttle valve port (35) periodically changes when the cam impact mechanism (3) stretches; The cam impact mechanism (3) comprises a cam anvil body (31) connected to the transmission mandrel (2) and a cam impact hammer (32) arranged on the upper joint (11), wherein the cam anvil body (31) and the cam impact hammer (32) are provided with cam step surfaces which are matched with each other; the side surface of the cam anvil body (31) is provided with a lower cam (34); The upper end of the cam impact hammer (32) is provided with an annular upper end face, the lower end of the cam impact hammer is provided with a cylinder sleeved on a rotating core (36), the lower end of the cylinder is provided with an upper cam (33), and the side face of the cylinder is provided with a throttle valve port (35); The inner wall of the upper joint (11) is provided with a flow guide ring groove, the upper end of the flow guide ring groove is connected with the annular groove of the outer shell (1), a step structure (17) is formed at the upper end of the flow guide ring groove, and when the cam impact hammer (32) stretches, the size of the throttle valve port (35) periodically changes under the shielding of the step structure (17).
2. 2. The turbine type oscillating impactor of claim 1, wherein a lower joint (12) is provided at a lower end of said outer housing (1), and an annular groove is provided on an inner wall of said outer housing (1) for mounting said turbine rotary mechanism (21).
3. 3. A turbine oscillating impactor according to claim 2, characterised in that an adjustment sleeve (13) is provided between the annular groove and the turbine rotation mechanism (21).
4. 4. A turbine oscillating impactor according to claim 3, characterized in that the cam step surface comprises an inclined surface (37) and a vertical surface (38), the inclined surface (37) of the upper cam (33) cooperates with the inclined surface (37) of the lower cam (34) when the driving spindle (2) rotates, so that the cam ram (32) protrudes upwards, and when the vertical surface (38) of the upper cam (33) is displaced from the vertical surface (38) of the lower cam (34), the cam ram (32) retracts downwards to generate an impact force.
5. 5. The turbine type oscillating impactor of claim 4, wherein an upper centralizing bearing inner ring (22) is arranged at the upper part of the transmission mandrel (2), a lower centralizing bearing inner ring (23) is arranged at the lower part of the transmission mandrel, an upper centralizing bearing outer ring (15) matched with the upper centralizing bearing inner ring (22) is arranged at the upper part of the outer shell (1), and a lower centralizing bearing outer ring (16) matched with the lower centralizing bearing inner ring (23) is arranged at the lower part of the outer shell.
6. 6. The turbooscillation impactor of claim 5, characterized in that the lower end of the drive spindle (2) is provided with an annular support (24), the lower end face of the annular support (24) being supported on the upper end face of the lower joint (12).
7. 7. Turbine oscillating impactor according to claim 6, characterized in that the side wall of the annular support (24) is provided with a converging channel (25).

Description

Turbine type oscillation impactor Technical Field The invention relates to a turbine type oscillation impactor, and belongs to the technical field of oil and gas exploration and development. Background Along with the acceleration of the progress of unconventional oil and gas exploration and development, the technology of large-displacement wells and horizontal wells is rapidly popularized and applied because the technology has great economic benefits and can meet the special operation purpose. In the long horizontal section drilling process, as the well inclination angle is increased and the length of the open hole section is increased, the drill string is contacted with the well wall for a long distance due to the action of gravity, friction between the drill string and the well wall (comprising axial friction force and friction torque) is large, so that the drilling pressure is not added during sliding drilling, the tool surface is difficult to put, and the mechanical drilling speed is very low. Therefore, with the increase of the construction quantity of large-displacement wells and horizontal wells, how to effectively reduce the friction resistance of the drill string to improve the mechanical drilling speed and increase the borehole extension capability becomes one of the important points of research and construction. At present, the antifriction and resistance reducing method applied to large-displacement wells and horizontal wells at home and abroad mainly comprises the following aspects of adjusting drilling fluid performance, enhancing well wall stability measures, enhancing solid phase control technology, optimizing well track, optimizing drilling tool combination, using various resistance reducing tools and the like. However, various drag reduction and speed increasing tools have certain use limitations, the cost of rotary guiding equipment is high, the mechanical drilling speed of the hybrid drill bit is low, and the drag reduction effect of a part of friction reduction stabilizer is small. The hydraulic oscillator converts partial hydraulic energy into vibration energy of the drill string, converts static friction between the drill string and a well wall into dynamic friction, and improves the drilling speed and the extending capacity of a long horizontal section. The hydraulic oscillator comprises a pulse generator and a vibration generator, however, the existing hydraulic oscillator has the problems of unstable performance, overhigh pressure drop of the whole machine, limited application condition of an ultra-deep horizontal well, unobvious drag reduction effect of a long horizontal section and the like, and the valve group can be eroded when the hydraulic oscillator works, so that the friction-reducing and pressure-supporting effect of the tool in the later use period is affected. Disclosure of Invention Aiming at the technical problems in the prior art, the invention provides a turbine type oscillating impactor which can stably generate oscillation, is suitable for environments such as ultra-deep horizontal wells and the like, and can avoid erosion of a valve group. The invention proposes a turbine oscillating impactor comprising: An outer housing; A transmission mandrel arranged in the outer shell and rotated by fluid, and The cam impact mechanism is arranged at the upper end of the transmission mandrel, and periodically stretches when the transmission mandrel rotates; The cam impact mechanism is provided with a throttle valve port, and the size of the throttle valve port periodically changes when the cam impact mechanism stretches. The invention is further improved in that a turbine rotating mechanism is arranged outside the transmission mandrel, and the turbine rotating mechanism drives the transmission mandrel to rotate under the action of fluid. The invention further improves that the upper end of the outer shell is provided with an upper joint, the lower end of the outer shell is provided with a lower joint, and the inner wall of the outer shell is provided with an annular groove for installing the turbine rotating mechanism. A further development of the invention consists in that an adjustment sleeve is arranged between the annular groove and the turbine rotary mechanism. The cam impact mechanism comprises a cam anvil body connected to the transmission mandrel and a cam impact hammer arranged on the upper joint, wherein the cam anvil body and the cam impact hammer are provided with cam step surfaces which are matched with each other. The invention is further improved in that the side surface of the cam anvil body is provided with a lower cam; The upper end of the cam impact hammer is provided with an annular upper end face, the lower end of the cam impact hammer is provided with a cylinder body sleeved on the rotating core, the lower end of the cylinder body is provided with an upper cam, and the side face of the cylinder body is provided with the throttle valve port. The invention i