Microsoft Technology Licensing, LLC

China Petroleum Chemical Corporation

Sinopec Petroleum Engineering Technology Research Institute Co., Ltd.

Dongqing Zhang

Gang Hua

Jianhua Liu

Haiping Zhang

Lingchao Xuan

Jiachang Wang

Lishuang Wang

Renlong Zhang

Yanbin Zang

Zhanning Gao

Guangjun Ma

A turbine type pulse generator for downhole drilling tool has a pulse generating device (), which has a turbine housing (), a turbine shaft () concentrically arranged inside the turbine housing (), a turbine mechanism arranged around the turbine shaft (), and a valve disc mechanism provided at a lower end of the turbine shaft (). The turbine mechanism is configured to drive the turbine shaft () to rotate under an impact of drilling fluid, so that a flow area of the valve disc mechanism is changed periodically to generate pressure pulses. The turbine type pulse generator also has an automatic control mechanism () configured to keep the turbine shaft () static relative to the turbine housing () in a circumferential direction during composite drilling, and to drive the turbine shaft () to rotate relative to the turbine housing () under an impact of the turbine mechanism during sliding drilling.

State self-adaptive turbine type pulse generator and downhole drilling tool

Comprehensive, compact, and discriminative representations of videos can be obtained using a counting grid representation of the video and aggregating features associated with active locations of the counting grid to obtain a feature representation of the video. The feature representation can be used for video retrieval and/or recognition. In some examples, the techniques may include conducting normalization and dimension reduction on the aggregated features to obtain a further compact and discriminative feature representation. In some examples, the counting grid representation of the video is generated using a pre-trained counting grid model in order to provide spatially consistent feature representations of the videos.

Compact video representation for video event retrieval and recognition

Growing community of inventors

Beijing, China

Dongqing Zhang