Axial hydraulic impact well-drilling speed-increasing tool

Abstract

The invention relates to an axial hydraulic impact well-drilling speed-increasing tool. According to the technical scheme, a shell body is connected with a stator of a power drilling tool, the insideof the shell body is connected with a shunt plate by a key structure, the upper portion of a power drilling tool joint is connected with a rotor of the power drilling tool, the lower portion of the power drilling tool joint is connected with a mandrel, and the power drilling tool joint and the mandrel rotate along with the rotor of the power drilling tool relative to the shell body and the shunt plate. The shunt plate is located in a shunt cavity formed by combination of the mandrel and the shell body, and a shut-off plate is located on the middle portion of the mandrel. The shunt plate and the shut-off plate realize periodic flow passage communication through relative rotation, so that the shut-off plate is impacted, and the mandrel generates axial impact as a whole. The axial hydraulic impact well-drilling speed-increasing tool has the beneficial effects that the rotor of the power drilling tool drives a drill bit to rotate normally at a high speed, and uniform, stable and periodic impact force can be generated depending on hydraulic power, so that axial hydraulic impact is completed to assist in improving rock breaking efficiency; and in addition, the structure is simple, the connection is compact and the length is extremely short, long-time work is facilitated, and popularization is facilitated.

Description

technical field [0001] The invention relates to a speed-increasing tool and method for drilling engineering, in particular to an axial hydraulic percussion drilling speed-increasing tool. Background technique [0002] In the process of oil and gas drilling, increasing the drilling speed is an effective means to reduce the drilling cost under the background of low oil price. However, in the process of directional drilling, the existence of directional special tools-power drilling tools makes it difficult to further increase the drilling speed. How to add speed-increasing tools between drill bits and nuclear power drilling tools is a problem that the field of oil and gas well engineering has been trying to solve. In directional wells, when power drilling tools exist, the required downhole speed-increasing tools should have the following characteristics: (1) match the deflection function of power tools and meet the control requirements of directional trajectory; (2) the length ...

AI Technical Summary

Problems solved by technology

The existing speed-up tools at home and abroad have disadvantages such as complex structure, short working life, not suitable for drilling in non-vertical well sections, and poor compatibility of drilling tools. The long-life hydraulic percussion speed-up tool compatible with measuring instruments is of great significance to the drilling speed-up of directional wells in deep hard formations, and plays an important role in accelerating the development of oil and gas resources and reducing drilling costs and risks

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