A method for automatic identification of drilling rig working state suitable for hydraulic drilling rig

Abstract

The invention discloses a drill working state automatic identification method suitable for a hydraulic drill. The method comprises the following steps: receiving a hook load value measured by a weight sensor, a hook displacement value measured by a winch sensor, a drilling liquid flow value measured by a pump stroke sensor and a lower pressure value measured by a pressure sensor; setting a hook load threshold value, a lower pressure threshold value, a shaft bottom overhead threshold value, a drilling fluid flow threshold value and a drilling pressure threshold value; automatically identifying the drill state according to a judging basis. The drill working state automatic identification method is suitable for the conventional drill as well as the hydraulic drill, the working state of the hydraulic drill can be identified accurately, and the problem of inaccurate of state judgment under the condition of small difference between heavy hook loads and light hook loads existing in the conventional method can be solved.

Description

technical field [0001] The invention relates to a method for automatically identifying the working state of a hydraulic drilling rig, which belongs to the technical field of drilling and mud logging in oil and gas exploration and development. Background technique [0002] During the drilling process in the field of oil and gas exploration and development, engineers and technicians need to timely and accurately measure the drilled well depth, master the drilling layers, and understand the working status of the drilling rig. At present, it is mainly done by on-site automatic measuring instruments. Well instrument, drilling parameter instrument, etc. The identification method of the drilling working state of these measuring equipment is to measure the displacement of the hook of the drilling rig by the winch sensor, the hook load of the drilling rig by the suspension weight sensor, and the pump impulse speed by the pump stroke sensor to comprehensively calculate and judge the d...

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Problems solved by technology

[0007] The invention provides an automatic identification method for the working state of the hydraulic drilling rig, which is suitable for both conventional drilling rigs and hydraulic drilling rigs, can accurately identify the working state of the hydraulic drilling rig, and can solve the problem of heavy and light hook loads in conventional methods. The problem of inaccurate status judgment when the difference is not large

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