Shock Absorber for Oil Well Drilling

Abstract

The invention discloses an oil well drilling damping device which comprises a work cylinder and a piston rod. The tail end of the piston rod is in threaded connection with a piston, the longitudinal section of the piston is in a T shape, two semicircular blocking plates are hinged to the tail end of the vertical portion of the piston, a plurality of upper leakage flow holes are formed in the horizontal portion of the piston, a plurality of lower leakage flow holes corresponding to the upper leakage flow holes are formed in the two blocking plates, the hole diameters of the upper leakage flow holes gradually increase from middle to two ends, and a coil assembly is arranged in the middle of the piston. When the oil well drilling damping device is used, the hole diameters of the leakage flow holes gradually increase from middle to two ends, a middle contraction opening of the leakage flow holes is achieved, and the grasp force, at the upper end and the lower end of the middle contraction opening, of magnetorheological fluid to the piston is enhanced. Meanwhile, the piston is started up and shut down in the work cylinder through quick conversion of external voltage. Due to the fact that no throttle valve with the variable throttle size is arranged in the oil well drilling damping device, the mechanical abrasion resistance of the oil well drilling damping device is greatly improved, and the service life of the oil well drilling damping device is prolonged.

Description

technical field [0001] The invention relates to a shock absorbing device, in particular to a shock absorbing device used for oil well 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, an...

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, resulting in an increase in the quality of the drilling tool during drilling

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