Push-the-bit device used for vertical drilling tool and vertical drilling tool

Abstract

The invention relates to a push-the-bit device, and the push-the-bit device is installed on a vertical drilling tool. The push-the-bit device comprises a body of a hollow cuboid structure, a rectangular cylinder sleeve and pistons, wherein the rectangular cylinder sleeve is installed in the push-the-bit body and sleeves a core shaft of the vertical drilling tool, and a pair of piston cavities is defined by first opposite side walls of the cylinder sleeve and the corresponding outer walls of the body; the pistons are installed in the piston cavities respectively. The pistons can move in the radial direction under the action of drilling fluid from the core shaft of the vertical drilling tool so as to press against a well wall.

Description

technical field [0001] The invention relates to the field of downhole tools for oil and gas well engineering, in particular to a pushing device for a vertical drilling tool and a vertical drilling tool including the pushing device. Background technique [0002] With the deepening of exploration and development of oil and gas fields, the formation structures encountered are becoming more and more complex, especially the problem of "deflection prevention and fast drilling" in high and steep structures is the difficulty and focus of drilling technology. Therefore, the promotion of vertical drilling tools The requirements for devices are also getting higher and higher. [0003] The traditional full-bore BHA and pendulum BHA use the lateral force of the drilling tool as the theoretical basis for well deviation control, which has great limitations. However, the anti-deflection technologies such as eccentric drilling tools, off-axis drilling tools, flexible drilling tools, anti-pe...

AI Technical Summary

Problems solved by technology

But there are still many problems, for example, this kind of mechanism adopts hydraulic mechanism, the structure is relatively complicated, the control requirements are high and the robustness is poor, and it is difficult to miniaturize in the small underground space

Moreover, the existing pushing devices basically have multiple ribs evenly distributed in the circumferential direction of a single axis plane. This structure limits the size of the internal structure, making it difficult to miniaturize the design and application of the pushing device.

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