A method and system for self-adaptive adjustment of drilling parameters

Abstract

The invention relates to a method and system for self-adaptive adjustment of drilling parameters, belonging to the field of automatic control. The system includes a stuck pipe probability monitoring and adjustment system, a smooth slag discharge monitoring and adjustment system, and an anchorage stability monitoring and adjustment system; the adjustment of drilling parameters comprehensively considers the stuck pipe probability, slag discharge effect, anchoring stability and construction efficiency , which can effectively ensure the effectiveness and safety of parameter adjustment, and ensure the efficient and stable operation of the drilling rig. The critical values ​​used for comparison are obtained through a large number of drilling tests and field data, which ensures the engineering practicability of this adjustment method and avoids the disconnection between adjustment rules and field conditions. Double closed-loop control of the actuator and hydraulic system, the monitoring effect is more comprehensive, and the adjustment accuracy is higher. Replacing simple closed-loop adjustment with an iterative optimization algorithm is more computationally efficient.

Description

technical field [0001] The invention belongs to the field of automatic control, and relates to a method and system for self-adaptive adjustment of drilling parameters. Background technique [0002] Most of the drilling rigs currently used are generally driven and controlled by full hydraulic pressure, and the main pressure parameters are generally displayed by pressure gauges. flow, etc.) to achieve. The parameter adjustment steps are as follows: first, the personnel observe the various pressures displayed by the operating system of the drilling rig, the drilling system of the drilling rig and the slag return in the hole; then, judge whether the current rotation and propulsion speed are reasonable according to experience; finally, manually adjust the rotation, Propel to control the pressure or flow of the corresponding valve to realize the adjustment of drilling parameters. [0003] In recent years, with the gradual popularization of automatic drilling rigs, the traditiona...

AI Technical Summary

Problems solved by technology

[0009] 1. Solve the problem of poor adjustment effect caused by the single consideration of parameter adjustment and failure to comprehensively consider the stability of the drilling rig, the possibility of drill sticking and other factors;

[0010] 2. Solve the problem of artificial setting of theoretical contrast value and poor engineering practice

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