Pointing Rotary Steering Drilling Tools

Abstract

The invention relates to a directing-type rotation guide drilling tool. The tool comprises a tool shell, wherein a center hole runs through the tool shell, and a hollow drill bit base is connected tothe bottom end of the tool shell in a petal mode; an inner guide cylinder which can be axially moved and can rotate in the circumference direction is arranged in the center hole, the bottom end of theinner guide cylinder is in swing connection with the drill bit base through a rotation supporting shaft, an outer guide cylinder which can push and pull the inner guide cylinder to axially move sleeves the inner guide cylinder, and the inner guide cylinder axially moves to change a bend angle between the drill bit base and the tool base; the top end of the inner guide cylinder is provided with arotation driving structure which can drive the inner guide cylinder to rotate in the circumference direction, the inner guide cylinder changes the orientation of the drill bit base through rotation inthe circumference direction, the rotation driving structure comprises a hollow screw output shaft, and the bottom end of the screw output shaft drives the inner guide cylinder to rotate in the circumference direction through a connection shaft. The tool can adjust the bend angle and orientation of the tool at the same time and achieve automatic guide drilling and control over the borehole trajectory in the drilling process.

Description

technical field

[0001] The invention relates to the technical field of petroleum drilling, in particular to a pointing rotary steerable drilling tool. Background technique

[0002] In recent years, in order to meet the needs of exploration and development of modern oil and gas fields, it is necessary to continuously innovate and optimize the wellbore trajectory control during the drilling process, especially in horizontal wells and extended-reach wells. Therefore, the formation conditions faced by drilling tools Increasingly complex, in order to achieve the purpose of increasing productivity, it is necessary to effectively control the well trajectory.

[0003] After entering the 21st century, the development and utilization of marine oil and gas resources, unconventional oil and gas, and new energy have become the commanding heights for countries to seek future development, especially the development of new energy such as combustible ice and hot dry rock, which has significa...

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