Feed-forward control method, feed-forward industrial personal computer and feed-forward control system for sliding steerable drilling

Abstract

The invention provides a feed-forward control method, a feed-forward industrial personal computer and a system for sliding steerable drilling, and the method comprises the steps: building a multi-body dynamic segmentation model of a sliding steerable drilling system according to well track design parameters inputted by a user; according to historical actual drilling data, stratum parameters in the dynamic segmentation model are updated; according to the drilled trajectory parameters and the borehole trajectory design parameters, deflection parameters of the target trajectory are obtained through calculation; a drilling process is simulated according to the BHA multi-body dynamic model and the deflection parameters of the target trajectory, and target shooting is carried out to obtain segmented point target control quantity; a balance process is simulated according to the drill rod multi-body dynamic model and the segmented point target control quantity, and a drilling machine feedforward control quantity is obtained through targeting; the drilling machine feedforward control quantity is sent to a drilling machine controller; and judging whether the drilled distance reaches the expected length or not, and if not, returning to continue to execute updating of the stratum parameters and the following steps. According to the invention, accurate, real-time and efficient sliding guide automatic drilling can be realized.

Description

technical field [0001] This paper relates to the field of sliding steerable drilling, in particular to a feedforward control method for sliding steerable drilling, a feedforward industrial computer and a system. Background technique [0002] Directional drilling is an important technology in drilling engineering, and sliding steering is one of the most commonly used directional methods. The traditional control method of sliding steerable drilling is feedback control. The directional well engineer needs to estimate the control amount according to the sensor data of the measurement while drilling tool during the drilling process, and instruct the driller to control the drilling rig to complete the drilling of the target trajectory. The above process relies heavily on manual experience, especially in deep well operations, the large slenderness ratio of the drill pipe and the complex environment at the bottom of the hole make the sliding steerable drilling system have the charac...

AI Technical Summary

Problems solved by technology

[0004] This article is used to solve the problem of sliding steerable drilling in the prior art. The manual determination of the drilling control quantity based on the data measured by the measurement-while-drilling tool has hysteresis and is prone to track deviation problems, and when there is a trajectory deviation to correct, there are problems of low drilling efficiency, high operating costs and high drilling risks

Images