Downhole speed-increasing tool with axial impact function

Abstract

The invention relates to a down-hole speed increasing tool with an axial impact function, and the tool is used in petroleum drilling operation, and solves a problem that rock breaking efficiency of hard rocks in well drilling is low. The technical scheme is that on the external of the tool, an upper housing and a lower housing are connected through threads, multistage turbine stators and turbine rotors are assembled on a turbine shaft through flat keys, the upper end of a multistage turbine is fixed through a nut, and the lower end is connected with a transmission shaft through threads. After the center of an upper flowing disk is sleeved into a bearing, the upper flowing disk is held in the lower part of the transmission shaft, and the periphery of the upper flowing disk is connected with the upper housing through a transmission rod by threads. A lower flowing disk is held in the lower part of the transmission shaft and is abutted against the upper flowing disk, and the lower end face of the lower flowing disk is provided with a slot. A piston hammer is held in an annular cavity housing and is embedded into the slot of the lower flowing disk from the upper part of the annular cavity housing. A half divided ring is clamped in an anvil block groove. An eight-direction sleeve is fixed on the lower housing through threads, and is clamped between the lower housing and an anvil block. The tool can generate periodic axial force, to periodically impact a drilling tool on the lower part, and rock breaking efficiency of a drill bit and drilling speed of a machine are improved, and drilling well cost is reduced.

Description

technical field [0001] The invention relates to an underground speed-increasing tool with an axial impact function used in the fields of oil and natural gas drilling engineering, mining, geological drilling and the like. Background technique [0002] With the depletion of well-occurring shallow oil and gas resources, drilling engineering has gradually developed to areas with severe environmental conditions such as deep wells and ultra-deep wells. After the depth of the well increases, the difficulty of rock breaking will increase greatly, resulting in low rock breaking efficiency of the drill bit, greatly reduced life and greatly reduced drilling speed. Most of the existing hydraulic impactors that can generate axial impact are realized by reversing valves, which are easily damaged by the erosion of drilling fluid, resulting in unstable performance and short life of the entire impactor. SUMMARY OF THE INVENTION [0003] The purpose of the invention is: in order to solve t...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a downhole speed-increasing tool with axial impact function in order to solve the problems of low rock-breaking efficiency and low ROP of the drill bit in deep wells and ultra-deep wells, as well as the problem that existing hydraulic impactors are easily damaged

Images