Hydraulic drilling and pressing device

Abstract

The invention provides a hydraulic drilling and pressing device, which comprises an upper joint connected with a drill rod; an outer cylinder, one end of the outer cylinder is connected with an upperjoint, a support, an elastic piece and a cylinder body are arranged in the outer cylinder, the elastic piece is arranged between the support and the cylinder body, when the support compresses the elastic piece under different pressures, the lower end of the support seat enters different parts of the stepped hole of the cylinder body so as to transmit different drilling pressures; and a lower jointassembly connected with the drill bit and provided with a torque transmission mechanism, which on the one hand provides connection with the outer cylinder and transmits torque through the torque transmission mechanism, and on the other hand transmits drilling pressure coming from the cylinder body to the drill bit through an internally arranged flow passage. The hydraulic drilling and pressing device can improve the transmitted drilling pressure value, realize the multi-stage adjustment of the one-stroke drilling pressure, improve the drilling pressure transmission efficiency, reduce the axial vibration of the drill bit and solve the drag pressure problem in the horizontal well.

Description

technical field [0001] The invention relates to the technical field of petroleum drilling, in particular to a hydraulic pressure drilling device. Background technique [0002] The hydraulic pressurizer is a tool that converts drilling hydraulic energy into piston kinetic energy and then applies drilling pressure to the drill bit. This flexible pressurization method not only absorbs the axial vibration of the drill bit and prevents the vibration from continuing to propagate to the upper drill string, but also is not affected by the frictional resistance between the drill string and the well wall, and can stably apply the required WOB to the drill bit. ROP, protection of drill bits and drilling tools have significant effects, and can solve the problem of difficult pressurization in horizontal wells. [0003] Hydraulic pressurizers can be divided into single-stage hydraulic pressurizers and multi-stage hydraulic pressurizers according to the number of stages, and can be divide...

AI Technical Summary

Problems solved by technology

Its disadvantages: the design of the flow channel is more complicated, it is necessary to slot and bury the pipeline on the cylinder body, and the processing is more difficult

Disadvantages: limited increase in drilling pressure, small adjustment range

Disadvantages: The sealing requirements between the slide valve and the piston rod are very high, which affects the service life

Advantages: The drilling pressure can be fine-tuned through the adjustment ring; Disadvantages: The position of the drill bit is not accurately judged on the ground, and it is difficult to determine the exact well depth

Disadvantages: Applied pressure on bit fluctuates, unstable

Disadvantages: the length of the tool is increased, which affects the judgment of the position of the drill bit, and the well depth is not accurate

Disadvantages: the length of the tool is increased, which affects the judgment of the position of the drill bit, and the well depth is not accurate

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