Flexible guide drilling tool

Abstract

The invention discloses a flexible guide drilling tool, and relates to the technical field of well drilling and drilling. According to the flexible guide drilling tool, a flexible driving drilling column and a guide drilling short section are tripped in through a conveying pipe column, and the well track control problem in a small-hole and ultra-short-radius well is solved; by arranging a deflection guide mechanism, the flexible guide drilling tool can drive a drill bit to deflect in the preset direction under the rotary drilling condition; drilling power transmission is achieved through a plurality of bearing short sections connected through universal transmission mechanisms; the deflection guide mechanism and an electric drive actuator are arranged in the different functional short sections respectively, connection is achieved through a flexible bridging connecting rod, the length of the guide drilling section and the distance between all the universal transmission mechanisms are shortened to the maximum extent, and the control problem of the flexible guide drilling tool is solved. According to the flexible guide drilling tool, a short-radius-to-ultra-short-radius well hole can be drilled through a small hole, or guide drilling can be continuously carried out through the short-radius-to-ultra-short-radius well hole.

Description

technical field [0001] The invention relates to the technical field of drilling and drilling, in particular to a flexible guiding drilling tool. Background technique [0002] The invention relates to a drilling technology, which relates to the field of drilling and drilling technology. In particular, it is a device and method for realizing controllable track lateral drilling of small holes. In order to improve the injection or recovery effect of the permeable formation, improve the controllability of the fracturing fracture shape, and finally achieve the effect of cost reduction and efficiency increase. The existing steering drilling technologies mainly include downhole motor steering drilling technology and rotary steering drilling technology. The maximum build-up rate that can be achieved by the above-mentioned technologies is generally not more than 15° / 30 meters, and it is impossible to realize short-radius steerable drilling with a controllable trajectory and a radius...

AI Technical Summary

Problems solved by technology

The maximum deflection rate that can be achieved by the above technologies is generally not more than 15° / 30 meters, and it is impossible to realize the controllable track short-radius directional drilling with a radius of curvature less than 60 meters

There are still many radial or short-radius drilling technologies that cannot effectively control the wellbore trajectory in the existing technology, and such technologies are not effective for the development and utilization of underground resources

However, for the field of extremely short-radius drilling with a turning radius of less than 10 meters, the existing radial drilling technology or short-radius drilling technology does not have the steering function and cannot realize the control of the wellbore trajectory

Because the currently used rotary steerable system is inherently unable to be bent, it is almost impossible to meet the actual needs of short-radius drilling, and it is impossible to achieve short-radius to extremely short-radius directional drilling under rotary drilling conditions

Other related products in the prior art also have the function of not being able to realize wellbore trajectory control under the condition of rotary drilling, resulting in a serious problem of dragging the bit pressure

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