Flexible steering drilling tool

Abstract

The invention discloses a flexible steering drilling tool, and relates to the technical field of drilling. According to the flexible steering drilling tool, the passing ability of the flexible steering drilling tool is improved through a flexible driving drilling column and a flexible driving control system, and the problem of well track control in a well with an extremely short radius is solved; by arranging a deflection guiding mechanism, the flexible steering 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; and the deflection guiding mechanism and an electric driving actuator are arranged in different functional short sections correspondingly and connected through the flexible transmission mechanisms, the length of a steering drilling section and the distance between the universal transmission mechanisms are decreased to the maximum extent, and the control problem of the flexible steering drilling tool is solved. According to the flexible steering drilling tool, drilling of the well with the short radius and the extremely short radius can be achieved, or steering drilling is continuously conducted through the well with the short radius and the extremely short radius.

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 exploration and development of underground material resources and space resources requires extensive application of drilling technology. 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 of curvature less than 60 meters. In the prior art, there are still many radial or short-radius drilling technologies that cannot effectively control the well trajectory, and such technologies have poor effects on the development and utilization of underground resources. However, for the field...

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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