A method for adjusting sliding drilling tool face

Abstract

The invention discloses an adjustment method of a slide drilling tool face. The method comprises the steps of a), drilling parameter collection; b), the tool face median phi and the tool face fluctuation range delta phi are determined according to borehole trajectory demands; c), parameter debugging of back-pressure preventing directional tool face adjustment is completed to fit a torque-angular speed curve; d), energy parameters of a borehole tool rotary drilling column are debugged according to the torque-angular speed curve, steps of drilling column rotation are automatically selected by asystem to conduct back-support preventing directional drilling; e), the torque-angular speed curve is constantly updated to optimize the drilling parameters combining with drilling parameter curve series. According to the method, a tool face is taken as the basis of controlling drilling column rotation to control the fluctuation range of the tool face when slide drilling is conducted, the fittingof the torque-angular speed curve is conducted in real time, the energy of borehole tool rotary drilling column is constantly optimized, the friction and torque gathered on the drilling column are released, and the problems of difficult adjustment of a conventional directional combined horizontal well tool face and frequent back pressure are solved.

Description

technical field [0001] The invention relates to the technical field of oil and gas exploration and drilling, in particular to a sliding drilling tool face adjustment method. Background technique [0002] With the deepening of the development of various oil and gas blocks, horizontal wells have been widely used. At present, for horizontal well directional drilling operations, the most important operation method is the conventional directional combination composed of downhole steering motor and MWD. [0003] The directional working mode of conventional directional combination is sliding directional. Its important features are: the drill string does not rotate, and the downhole steering motor drives the drill bit to rotate to break rock. By adjusting the tool face of the steering motor, the inclination and azimuth of the wellbore can be changed. Complete multiple operations such as directional build-up, torsion and azimuth, and then realize the control of the geometric traject...

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to address the defects and deficiencies in the above-mentioned prior art, and to provide a sliding drilling tool face adjustment method. The friction and torque on the column solve the problems of difficult tool face adjustment and frequent "back pressure" in conventional directional combined horizontal wells

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