Boe Technology Group Co., Ltd.

Hefei Boe Display Technology Co., Ltd.

China National Petroleum Corporation

Cnpc Engineering Technology R&d Company Limited

Fei Han

Mo Chen

Chen Wang

Guodong Zhan

Kai Chen

Chao Kong

Tao Jia

Jianhua Guo

Fangqing Li

Siying Lu

Mingjie Lv

Yongliang Yu

Zhitong Liu

Binggui Xu

Hongwei Yin

Huijuan Guo

Jianli Wang

Yingjie Zhu

Quanli Zhang

Fuxiang Hou

Wanjun Li

Zhijian Hu

Boxuan Xing

Depei Shi

Wangdi Wu

Disclosed are an expansion tool assembly, comprising: an expandable tubular; a guide shoe partially inserted into and connected to the lower end of the expandable tubular; a sealing sleeve arranged in the expandable tubular and connected to the upper end of the guide shoe; an expansion assembly comprising an expansion cone and expansion seat disposed inside the expandable tubular, wherein the lower end of the expansion seat is connected with hooks, which can be rested on the upper end of the sealing sleeve; an upper joint that is connected to the upper end of the expansion seat and can be connected to a drill string. A force transfer path can be established via connection between the expansion seat and sealing sleeve, so that expandable tubular weight is borne on the drill string. Unintentional expansion of the expandable tubular, caused by interaction between expandable tubular and expansion cone, can be avoided.

Expansion tool assembly for expandable tubular

The present disclosure discloses a shift register, a driving method thereof, a driving circuit, and a display device. The shift register includes an input circuit, a first control circuit, a second control circuit, and an output circuit. Signal shift output can be implemented through mutual cooperation between respective circuits. An output signal can be used as a light emitting control signal of a light emitting control transistor, or can be used as a gate scanning signal of a scanning control transistor.

Shift register, driving method thereof, driving circuit, and display device

A shift register including an input circuit, an output circuit, a first output control circuit, a second output control circuit, a reset circuit, a first reset control circuit, a second reset control circuit, and an energy-storing circuit. The first output control circuit is configured to transfer a clock signal present at a third clock signal terminal to a first node in response to the clock signal at the third clock signal terminal being active. The second output control circuit is configured to transfer a voltage present at a first voltage terminal to the first node in response to a clock signal at a fourth clock signal terminal being active.

Shift register, driving method thereof, gate driving circuit, display panel and display device

Growing community of inventors

Beijing, China

Fei Han