High-frequency torsional vibration viscosity reducing tool

Abstract

The invention relates to a high-frequency torsional vibration viscosity reducing tool, which is mainly composed of an upper connector shell, a flow splitting sleeve, an impact hammer, a reversing shifting fork, an impact valve body, a retainer, a positioning clamping ring, a jet nozzle and an adapter substitute. When the high-frequency torsional vibration viscosity reducing tool works, hydraulic energy of drilling fluid is converted into mechanical energy of the tool, after the drilling fluid enters the tool through the upper connector shell, most of the drilling fluid flows out through a central flow passage, a part of the fluid is split through small holes in the flow splitting sleeve, the part of the drilling fluid flowing through the central flow passage is split through the reversingshifting fork, reciprocating movement of the reversing shifting fork and the impact hammer is realized through flow passage conversion inside the tool, the impact hammer collides with the impact valvebody back and forth to generate a circumferential reciprocating impact load, and finally the circumferential load is transmitted downwards through the adapter substitute. According to the high-frequency torsional vibration viscosity reducing tool, the stick-slip phenomenon of a drill string can be relieved or eliminated, rock breaking of a drill bit is accelerated, the drilling efficiency is improved, and the drilling cost is saved.

Description

technical field [0001] The invention relates to a high-frequency torsional vibration viscosity-reducing tool used in oil and gas drilling engineering, in particular, it is suitable for the drilling process of structural wells such as horizontal wells, branch wells, and high-inclination wells for the development of new oil and gas resources. Background technique [0002] In the process of exploiting oil and gas well resources with new or poorer conditions, drilling engineering is faced with a more complex stratum working environment. Generally speaking, in the case that directional wells, horizontal wells, and lateral wells account for a large proportion of the existing well types, they are developing in a deeper, farther, and more complex direction. Based on this situation, the economic and social benefits of technologies such as drilling speed increase and downhole state prediction are particularly prominent, and the development of corresponding new drilling speed increase ...

AI Technical Summary

Problems solved by technology

The stick-slip phenomenon produced by the drill string system leads to rapid wear of the PDC bit, which is prone to breakage, falling off and other problems, resulting in the failure of the PDC bit. In addition, the stick-slip phenomenon will also reduce the service life of the drill string and bring serious damage to the entire drill string system. massive economic loss

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