New Axial Impact Tool Based on Turbine and Cam

Abstract

The invention relates to a novel axial impact tool based on a turbine and a cam. The novel axial impact tool comprises an outer shell, an impact assembly, a speed reducer, a flow guide assembly and a turbine assembly; the novel axial impact tool adopts the technical scheme that an upper part is connected with a drill string; a lower part is connected with a screw drill or a turbine drill; during operation, a drilling fluid enters the outer shell to drive the turbine assembly to rotate at a high speed; the high-speed rotation of the turbine assembly is reduced to an appropriate operating speed of the cam by the speed reducer; periodic axial mechanical vibration and hydraulic pulse are produced by matched movement of the cam and a roller as well as axial periodic movement of an upper impact cylinder, a lower impact cylinder and an inner flow guide cylinder; a flow of the drilling fluid entering the screw drill or the turbine drill changes periodically; a drill bit generates relatively large axial impact at a relatively low rotating speed and generates relatively small axial impact at a relatively high rotating speed. The novel axial impact tool provided by the invention can effectively increase mechanical drilling speed and service life of the drill bit and improve rock breaking efficiency.

Description

technical field [0001] The invention relates to a novel axial impact tool based on a turbine and a cam used in the field of oil and gas drilling engineering. Background technique [0002] With the continuous development of the economy, the demand for oil and gas is increasing, while the shallow oil and gas resources in my country are becoming more and more exhausted. The oil and gas development technology continues to improve, the depth of oil and gas wells increases, and the number of deep and ultra-deep wells increases. The formation working environment faced by the drilling project is more complicated, and the drilling depth continues to increase, and the hardness and strength of the rock will increase significantly under the confining pressure of the bottom layer, resulting in low rock breaking efficiency of the drill bit. Now the more effective drilling tools are mainly rotary drilling tools, which apply periodic impact loads to the drill bit while rotating and drilling...

AI Technical Summary

Problems solved by technology

The formation working environment faced by the drilling project is more complex, and the drilling depth continues to increase, and the hardness and strength of the rock will increase significantly under the confining pressure of the bottom layer, resulting in low rock breaking efficiency of the drill bit

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