公开(公告)号：US12297705B1

公开(公告)日：2025-05-13

申请号：US18939678

申请日：2024-11-07

Applicant: Chengdu University of Technology

Inventor： Xingming Wang ,  Qiaozhu Wang ,  Qingyou Liu ,  Haiyan Zhu ,  Xuelian Dong ,  Yuanyuan Yang ,  Jingran Tang ,  Luqing Li

IPC: E21B23/00 ,  E21B23/03 ,  E21B23/04 ,  E21B47/06

Abstract: The present invention discloses a support mechanism of a self-adaptive traction robot for a complex wellbore and a control method thereof, and relates to the technical field of oil and gas field development. Each support link assembly in a support mechanism is controlled by an independent hydraulic cylinder and hydraulic valve. When a well wall that each support link assembly contacts in a circumferential direction is irregular, the support mechanism contact effect is not ideal, which leads to a decrease in traction force. In this case, a displacement sensor in a telescopic mechanism detects that a displacement of a traction cylinder piston is small, which is fed back to a ground control system, and then a fluid inflow size of support cylinders corresponding to different support link assemblies is adjusted until the displacement sensor in the telescopic mechanism detects an effective traction distance.

公开(公告)号：US11668148B1

公开(公告)日：2023-06-06

申请号：US17983826

申请日：2022-11-09

Applicant: Chengdu University of Technology

Inventor： Xuelian Dong ,  Haiyan Zhu ,  Qiaozhu Wang ,  Jingran Tang ,  Qingyou Liu ,  Xingming Wang ,  Linfeng Sun

IPC: E21B23/00 ,  E21B23/04 ,  E21B17/07 ,  E21B43/263

CPC classification number: E21B23/001 ,  E21B17/073 ,  E21B23/042 ,  E21B23/0411 ,  E21B23/0412 ,  E21B43/263

Abstract: The present invention relates to the technical field of development of underground resources such as petroleum, natural gas, geothermal energy, etc., in particular to a downhole explosion robot based on planetary roller screw telescoping and traction method thereof. The present invention provides a downhole explosion robot based on planetary roller screw telescoping and traction method thereof, comprising a rear joint, a rear main body, a telescopic sub, a front main body, and a front joint, and the rear main body is provided with a rear control sub and a rear support sub; the front main body is provided with a front support sub and a front control sub, and the telescopic sub is respectively connected with the rear support sub and the front support sub. The invention has the advantages of reliability and stability, with less impact on the tube string, and can be applicable to smaller wellbore.