Top drive control system of hydraulic drive

Abstract

The invention relates to the technical field of hydraulic control, in particular to a top drive control system of a hydraulic drive of an automatic drilling machine. An outlet of a variable pump of the system is connected with an inlet of a hydraulic control proportional directional valve; two outlets of the hydraulic control proportional directional valve are respectively connected with two working oil ports of a motor through a one-way valve II and a one-way valve V; the outlet of a control pump is connected with the inlet of a control handle; two outlets of the control handle are connected on two control ports of the hydraulic control proportional directional valve, and synchronously connected on two inlets of a shuttle valve I; the outlet of the shuttle valve I is connected with a control port of a hydraulic control directional valve II; the inlet of the hydraulic control directional valve II is connected with the control port of the variable pump, and the outlet of the of the hydraulic control directional valve II is connected with the outlet of the shuttle valve II; two inlets of the shuttle valve II are connected with the two working oil ports of the motor. According to the top drive control system, the implementation and application of the hydraulic top drive technique of the deep well are achieved; in this way, the defects of blank of the hydraulic top drive technique of the existing deep well are overcome.

Description

Technical field: [0001] The invention relates to the technical field of hydraulic control, in particular to a hydraulically driven top drive control system of an automatic drilling rig. Background technique: [0002] With the mature application of top drive technology in drilling engineering, hydraulic top drive has also achieved considerable development due to its advantages of safe and reliable operation, low cost, and small structure. Hydraulic top drive has been used for decades abroad, but in China In recent years, the hydraulic top drive for shallow wells (below 3000m) has just been successfully developed, and the hydraulic top drive for deep wells is still blank. Invention content: [0003] The technical problem to be solved by the present invention is to provide a hydraulically driven top drive control system, which realizes the implementation and application of the deep well hydraulic top drive technology. The problem that the existing deep well hydraulic top dri...

AI Technical Summary

Problems solved by technology

[0002] With the mature application of top drive technology in drilling engineering, hydraulic top drive has also achieved considerable development due to its advantages of safe and reliable operation, low cost, and small structure. Hydraulic top drive has been used for decades abroad, but in China In recent years, the hydraulic top drive for shallow wells (below 3000m) has just been successfully developed, and the hydraulic top drive for deep wells is still blank

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