Drilling rig drilling buffer device

Abstract

The invention discloses a drilling machine drilling buffering device which comprises a working cylinder and a piston rod. A piston with the T-shaped longitudinal section is connected to the tail end of the piston rod in a threaded mode. Two semicircular baffles are hinged to the tail end of the vertical portion of the piston. A plurality of upper drainage holes are formed in the horizontal portion of the piston. The two baffles are provided with a plurality of lower drainage holes corresponding to the upper drainage holes. The diameter of the upper drainage holes is gradually increased from the middle to the two ends. A coil is arranged in the middle of the piston. During working, the diameter of the drainage holes is gradually increased from the middle to the two ends, so that the middles of the drainage holes are necked down, the grasping force of magnetorheological fluid at the upper and lower ends of the necking-down part on the piston is increased, and meanwhile the starting and stopping motion of the piston inside the working cylinder is achieved through rapid conversion of external voltage; due to the fact that no throttling valves with the variable throttling area is installed, the mechanical wear resistance of the drilling machine drilling buffering device is greatly improved, and the service life of the drilling machine drilling buffering device is prolonged.

Description

technical field [0001] The invention relates to a shock absorbing device, in particular to a drilling buffer device for drilling. Background technique [0002] In oil drilling, the drilling tool is driven to break the rock, drill into the ground, and drill a wellbore with a specified depth for the oil or gas extraction machine to obtain oil or natural gas. a regular oil drill rig It is mainly composed of power machine, transmission machine, working machine and auxiliary equipment. The drilling tool is equipped with a hoisting system for lifting and lowering the drilling tool, running the casing, controlling the drilling pressure, and feeding the drilling tool; the lifting system includes a winch, auxiliary brake, crown block, traveling block, hook, wire rope and lifting ring , Elevators, hanging clamps, slips and other tools. When hoisting, the winch drum winds the steel wire rope, the crown block and traveling block constitute the auxiliary pulley block, and the hook ris...

AI Technical Summary

Problems solved by technology

These adjustable shock absorbers change the flow area by adjusting the opening size of the orifice, so as to adjust the damping coefficient, and the output damping force changes with the stroke of the piston on the shock absorber; but when dealing with a large impact It must be realized by reducing the throttle and increasing the stroke of the piston. As a result, the quality of the drilling tool increases during drilling; and in the long-term use process, when the service life of the coil is reached, the existing damping device Usually, the entire piston part is replaced directly. Although it is simple and direct, the replacement cost is relatively high, which is not conducive to the promotion of use.

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