公开(公告)号：US12221849B2

公开(公告)日：2025-02-11

申请号：US17997275

申请日：2021-01-26

Applicant: SICHUAN UNIVERSITY

Inventor： Mingzhong Gao ,  Ling Chen ,  Jianan Li ,  Cong Li ,  Zhiqiang He ,  Le Zhao ,  Mingqing Yang ,  Nianhan Wu ,  Bo Yu

IPC: E21B34/14 ,  E21B33/06 ,  E21B34/12

Abstract: An internal blowout-prevention gas-retaining connector has a body mounted at the bottom of a drill pipe. The body includes a valve pipe section and a connecting pipe section arranged from top to bottom. The bottom of the valve pipe section is inserted into the top of the connecting pipe section. The blowout-prevention valve seat is provided at a bottom end of the valve pipe section while a blowout-prevention valve bonnet is provided on a bottom surface of the valve pipe section. The edge of the blowout-prevention valve bonnet is rotatably connected to a bottom surface edge of the valve pipe section. A torsion spring is provided on a bottom surface of the blowout-prevention valve bonnet. One end of the torsion spring is connected to the bottom surface of the blowout-prevention valve bonnet while the other end is connected to the inner wall of the connecting pipe section.

公开(公告)号：US12216021B2

公开(公告)日：2025-02-04

申请号：US17732602

申请日：2022-04-29

Applicant: SHENZHEN UNIVERSITY ,  SICHUAN UNIVERSITY

Inventor： Mingzhong Gao ,  Heping Xie ,  Guikang Liu ,  Ling Chen ,  Cong Li ,  Bo Yu ,  Xiangbiao Jiang ,  Yong Zhu ,  Chenghang Fu ,  Jianjun Hu ,  Nianhan Wu ,  Zhiqiang He ,  Mingqing Yang

IPC: G01M13/003 ,  F16K1/18 ,  F16K31/08

Abstract: A simulation device for magnetic closing of flap valve is disclosed, which includes a worktable, a driving mechanism for driving the worktable to rotate, a valve seat, a magnetic valve cover movably connected with the valve seat, a first magnet for repelling the magnetic valve cover, a cylinder, a lifting equipment for driving the cylinder to rise and fall. When the cylinder is inserted into the valve seat driven by the lifting equipment, the cylinder prevents the closure of the magnetic valve cover. When the cylinder is out of contact with the magnetic valve cover driven by the lifting equipment, the magnetic valve cover is closed, and the worktable in the simulation device can rotate and turn over, so that the closing process of flap valve (valve seat and valve cover) in any direction of deep drilling coring under the action of magnetic force is simulated.