Lifting and lowering buffer control device for derrick of drilling machine and use method thereof

Abstract

The invention relates to a lifting and lowering buffer control device for a derrick of a drilling machine and a use method thereof. The device comprises two buffer hydraulic cylinders fixed on a propeller strut, wherein a control handle for controlling the buffer hydraulic cylinders is connected with the two buffer hydraulic cylinders through a hydraulic system; and the hydraulic system comprises an oil pump, an oil tank, a three-position four-way directional control valve, a system overflow valve, a buffer overflow valve, a speed regulating valve and a hydraulic balance lock composed of two hydraulic control one-way valves. According to the invention, one control handle is used for controlling the coordination action of the two buffer hydraulic cylinders, so that the device provided by the invention has a buffering function, a balancing function and a speed regulating function; the system response is rapid, the adjustment is convenient, and the buffer cylinders at the two sides have uniform stress, so that the accident rate is greatly reduced, and the stability and reliability of the device are improved; and the device is also suitable for the lifting and lowering processes of a base of the drilling machine.

Description

technical field [0001] The invention relates to a drilling rig assembly auxiliary device, in particular to a drilling rig derrick lifting and lowering buffer control device and a use method thereof. Background technique [0002] The assembly and disassembly of the drilling rig at the well site is one of the more dangerous links in the entire drilling operation. It needs to be equipped with a derrick or base lifting and lowering buffer device for protection, and the working performance and stability of the buffer device directly determine the drilling rig assembly process. Is it safe and reliable. [0003] The Chinese patent application number 201020150282.0 (application date is April 6, 2010) discloses a "lifting derrick buffer device", and the application number is 201120254783.8 (application date is July 18, 2011). A kind of "derrick lifting buffer device" all adopts the mode of installing a hydraulic cylinder on the gable frame to control its docking speed to play a buff...

AI Technical Summary

Problems solved by technology

[0004] During use, it was found that the above-mentioned device has the following problems: 1) During the lifting and lowering process, the actions of the two buffer hydraulic cylinders are independently controlled by the two control handles. If the operation is not coordinated properly, the derrick and the buffer hydraulic cylinder will be damaged Collision and contact occurred, resulting in a severe imbalance of instantaneous force on the two buffer hydraulic cylinders, causing the hydraulic cylinder rods to be distorted, deformed or scrapped; 2) During the operation, due to the manual operation, the state of the derrick was only judged by the operator's vision and experience And operate, the action of the buffer hydraulic cylinder is completed by the feeling of the control handle manually, so that the derrick slowly leans against the herringbone frame, the quality of the action completion is greatly affected by human factors, and the stability is poor

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