VFD control system and method for automatic optimization of drilling parameters

Abstract

The invention discloses a VFD control system and method for automatic optimization of drilling parameters. The system includes a programmable controller PLC subsystem, a control display screen, a frequency converter VFD and a motor. The programmable controller PLC subsystem collects drilling data in real time and calculates and analyzes all kinds of data which serves as a basis of the optimized operation; the control display screen can have access to a webpage of the programmable controller PLC subsystem, displays various parameters and can automatically conduct the optimized operation; the frequency converter VFD receives a control command of the programmable controller subsystem and controls the rotating speed of the motor; the method is based on mechanical specific energy calculation, and the automatic optimization and manual optimization are combined. According to the VFD control system and method for the automatic optimization of the drilling parameters, the drilling efficiency is improved, the wearing capacity of the drilling head is reduced, downhole working conditions can be predicted, drilling accidents are prevented, and the drilling cost is reduced.

Description

technical field [0001] The invention relates to the field of petroleum drilling, in particular to a VFD control system and method for automatic optimization of drilling parameters. Background technique [0002] The current drilling rig is only an actuator, and the driller needs to set drilling parameters according to the pre-drilling optimization results of the drilling engineer, such as pump stroke (displacement), top drive speed, WOB, etc. The drilling rig itself cannot optimize these drilling parameters in real time. The future drilling technology will inevitably move toward automation and intelligence. According to changes in drilling conditions, the real-time (closed-loop) optimization function of drilling parameters will be an inevitable requirement for drilling equipment. The optimization of drilling parameters belongs to the category of drilling engineering, which is in line with the concept of "Internet + equipment manufacturing", that is, equipment manufacturing e...

AI Technical Summary

Problems solved by technology

This patent cannot guide the driller to perform automatic and manual selection optimization, and is different from the technical solution of the present invention based on the calculation of mechanical specific energy for optimization

[0006] At present, the optimization of drilling parameters has not realized real-time optimization according to the change of drilling conditions. The existing optimization process is inefficient and the drill bit is seriously worn

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