Hydraulic circumferential torque impact generator

Abstract

The invention relates to a hydraulic circumferential torque impact generator and belongs to the field of underground drilling speed-improving tools in the petroleum drilling process. The impact generator comprises a housing head, a housing, a screen pipe, a circulation starter and an orifice plug. An assembly sleeve is arranged in the housing, an impact hammer is assembled in the assembly sleeve, the screen pipe is arranged in the impact hammer, the circulation starter is installed on the screen pipe through a screen pipe sliding bearing, and a seal piece is installed on one side of the impact hammer and a port of the circulation starter and is tightly fit with the impact hammer and the port of the circulation starter. A sand removal sleeve is installed in the housing between the seal piece and an anti-drop block through a positioning sleeve, and the orifice plug is installed in the positioning sleeve on one side of the sand removal sleeve through a housing head sliding bearing. The impact generator produces high-frequency low-amplitude torque impact through the impact hammer to improve mechanical drilling speed, and the service life of a well drilling tool is prolonged. The problem that an existing torque impact device is unreasonable in structural design and accordingly the service life of the drilling tool is short is solved. The hydraulic circumferential torque impact generator is especially suitable for petroleum drilling.

Description

technical field

[0001] The invention relates to a hydraulic circumferential torque impact generator, which belongs to the field of downhole drilling speed-increasing tools in petroleum drilling engineering. Background technique

[0002] The stick-slip vibration will inevitably occur during the drilling process of the drill bit. At the same time, with the continuous increase of oil and gas exploration, especially the development of shale gas, the proportion of horizontal wells, deep wells and ultra-deep wells in oil drilling The proportion is getting bigger and bigger, which makes drilling more difficult, which makes this phenomenon more and more serious. The stick-slip vibration is a common and important factor that easily causes the failure of the drilling tool and reduces the ROP during the drilling process. This phenomenon is especially obvious when drilling deep hard formations. Experimental studies and theory have shown that stick-slip vibrations can be suppressed by h...

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