A directional sidetrack slim hole tool

CN117266747BActive Publication Date: 2026-07-03SOUTHWEST PETROLEUM UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
SOUTHWEST PETROLEUM UNIV
Filing Date
2023-10-16
Publication Date
2026-07-03

AI Technical Summary

Technical Problem

Existing technologies cannot adjust the direction and angle of sidetracking in real time and lack vector steering control, resulting in low applicability and reservoir drilling rate of radial horizontal well technology, as well as high costs.

Method used

Using directional side-drilling small-bore tools, the circumferential and axial positions of the inclined body are adjusted by the orientation and inclination angle of the lower port of the guide tube. The orientation and angle of the drill string are adjusted by mechanical transmission and electromagnetic control. Combined with hydraulic anchor and battery power supply, multiple adjustments and retrievals can be achieved.

Benefits of technology

It enables the adjustment of the drilling azimuth and angle of the drill string according to actual needs, improves the applicability of radial horizontal wells and the reservoir drilling rate, and reduces the time and cost of sidetracking wells.

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Abstract

This invention pertains to drilling tools, specifically a directional sidetracking small-diameter tool. The directional sidetracking small-diameter tool mainly comprises a drill string working window assembly, a transmission assembly, and a hydraulic anchor. The drilling azimuth and angle are determined by the azimuth and inclination radii of the lower port of the guide tube in the drill string working window assembly. A pressure signal indicating the working position of the inclined body can be released from the wellhead. Through the control circuitry within the directional sidetracking small-diameter tool, the working position of the inclined body is adjusted, allowing the lower port of the guide tube to reach the required azimuth and inclination angle, thus controlling the drilling direction. This invention allows for adjustment of the drilling direction and angle of the sidetracking tool according to actual requirements, improving the applicability of radial well technology and reservoir penetration rate, while saving time and costs associated with sidetracking.
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