公开(公告)号：US12091971B2

公开(公告)日：2024-09-17

申请号：US18346104

申请日：2023-06-30

Applicant: CHINA UNIVERSITY OF MINING AND TECHNOLOGY, BEIJING

Inventor： Yifan Zeng ,  Shihao Meng ,  Qiang Wu ,  Lu Wang ,  Shijie Tang ,  Xuedong Kan ,  Chao Yu ,  Han Bao

IPC: E21B47/11 ,  E21B33/124 ,  E21C39/00 ,  E21F16/00

CPC classification number: E21C39/00 ,  E21B33/1243 ,  E21B47/11 ,  E21F16/00

Abstract: A tracer diffusion device includes: a first container, a second container, a drilling pipe, a unidirectional driving device, and a bidirectional driving device. The first container holds a first fluid containing a tracer. The second container holds a second fluid. A first end of the drilling pipe is connected to the first container; a second end of the drilling pipe is extended into a borehole and equipped with a first sealing capsule and a second sealing capsule. A plurality of through holes are arranged on the drilling pipe between the first sealing capsule and the second sealing capsule. The unidirectional driving device is arranged on the drilling pipe, for injecting the first fluid from the first container into the borehole between the first sealing capsule and the second sealing capsule. The bidirectional driving device is arranged between the second container and the first sealing capsule.

公开(公告)号：US12140025B1

公开(公告)日：2024-11-12

申请号：US18735748

申请日：2024-06-06

Applicant: CHINA UNIVERSITY OF MINING AND TECHNOLOGY, BEIJING

Inventor： Yifan Zeng ,  Weihong Yang ,  Qiang Wu ,  Xuan Xiao ,  Kai Pang ,  Xinjiang Wei ,  Xue Liu ,  Aoshuang Mei ,  Shihao Meng ,  Chao Yu

IPC: E21B7/06 ,  E21B47/022

Abstract: A directional drilling method applied to a rigid bending joint directional drilling device includes: obtaining geological data; determining a lateral drilling point and a target point of a branching borehole based on the geological data; drawing a target borehole trajectory of the branching borehole based on the lateral drilling point and the target point; obtaining parameters of the drill pipe; determining a propulsion force corresponding to the target borehole trajectory based on the parameters, the target borehole trajectory, and the geological data; and applying the propulsion force to the rigid bending joint directional drilling device for drilling the branching borehole. A directional drilling system and related devices are also disclosed.

公开(公告)号：US12129620B1

公开(公告)日：2024-10-29

申请号：US18600416

申请日：2024-03-08

Applicant: CHINA UNIVERSITY OF MINING AND TECHNOLOGY, BEIJING

Inventor： Yifan Zeng ,  Weihong Yang ,  Qiang Wu ,  Kai Pang ,  Xinjiang Wei ,  Xue Liu ,  Xuan Xiao ,  Aoshuang Mei ,  Shihao Meng ,  Chao Yu

IPC: E21B33/13 ,  E02D3/12

CPC classification number: E02D3/12 ,  E02D2250/003 ,  E21B33/13

Abstract: Disclosed is a method for repairing an aquifer in a coal mine area by grouting, including: drilling a survey hole in a ground area corresponding to a water inflow position from ground surface to a caving zone in a goaf; determining a target layer for grouting in the survey hole based on drilling data collected from the survey hole while drilling; changing the survey hole to a grouting hole; measuring a first water level from the grouting hole; grouting through the grouting hole; changing the grouting hole to an observation hole; measuring a second water level from the observation hole; and determining a water retention level based on the first water level and the second water level.