Drilling Rig System and Drilling Method Based on Dynamic Control of Adaptive Downhole Drill Tool Face

Abstract

A drilling rig system and a drilling method based on dynamic control of an adaptive downhole dynamic drilling tool tool face. The drilling rig system includes a dynamic control system and a drilling system. The dynamic control system includes a data acquisition module, a control strategy input module, a drilling model information input module, Multi-body dynamics modeling module, adaptive model correction module, tool surface estimation module, control law generation module, execution module and dangerous state judgment module. The user inputs the control strategy and drilling model, the data acquisition module collects the drilling conditions of the system, the multi-body dynamics modeling module performs multi-body dynamics modeling based on the drilling model, and the adaptive model correction module corrects the multi-body dynamics model based on the drilling conditions , the tool face estimation module and the control law generation module calculate the control law of the control actuator based on the control strategy, drilling situation and the revised multi-body dynamic model; the dangerous state judgment module sends an alarm when the system is in a dangerous state. The invention can significantly improve the working efficiency and precision of directional drilling, and can be widely used in underground directional drilling operations.

Description

technical field [0001] The invention relates to an oil and gas field drilling rig system and a drilling method, in particular to a top drive drilling rig system and a drilling method based on multi-body dynamics model-based adaptive downhole drilling tool face dynamic control. Background technique [0002] Sliding drilling using angled drilling tools is a commonly used drilling method in petroleum directional drilling. Due to changes in formation lithology, changes in mud pump speed, wear of drill bits and power drilling tools, etc., the tool face of downhole drilling tools is prone to drift, which will cause the wellbore trajectory to deviate from the designed trajectory. When the ground engineer finds that the tool face of the drilling tool drifts, the conventional treatment method is to immediately stop the drilling and lift the drilling tool, adjust the tool face of the drilling tool to the required position, and then go down and continue drilling. Obviously, this metho...

AI Technical Summary

Problems solved by technology

Obviously, this method will affect the drilling schedule, reduce work efficiency, and increase drilling costs

In addition, in the conventional sliding steerable drilling process, because the drill string of the sliding steerable drilling system does not rotate, it is easy to generate a large frictional torque

For the wellbore with clear formation conditions, the frictional torque can be overcome by rotating the top drive according to the well depth and the combination characteristics of the drilling tool; but for the large slenderness ratio flexible drill string system, it is difficult to control the tool face and the wellbore trajectory. achieve effective control

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