Amazon Technologies, Inc.

China National Petroleum Corporation

Cnpc Engineering Technology R&d Company Limited

Peng Kang

Yuhui Jin

Cheng He

Yang Wenbo

Qiang Li

Xue Wang

Tao Jia

Mingjie Lv

Hongwei Yin

Zhitong Liu

Huijuan Guo

Wenbo Yang

Jianli Wang

Binggui Xu

Daniel He

Yi Tian

Aiguo Wang

A mechanical and hydraulic dual-effect expansion device for well drilling with expandable tubular technology includes an anchor having a lower end connected to an upper end of an insertion connection tube via a coupling, a hydraulic cylinder assembly comprising a hydraulic cylinder and a piston tube movably disposed within an inner cavity of the hydraulic cylinder, and a variable-diameter expansion cone assembly comprising a sealing cone portion and a variable-diameter expansion cone portion, wherein the sealing cone portion has an upper end connected to a lower end of the piston tube and a lower end connected to an upper end of the variable-diameter expansion cone portion. The mechanical and hydraulic dual-effect expansion device can facilitate completion of construction operations of an expandable tubular in a casing and an openhole system.

Mechanical and hydraulic dual-effect expansion device for well drilling with expandable tubular technology

Indexing and querying in multiple languages is accomplished using an ordered chain of filters and/or other such components. When receiving information to be indexed or for a query, the information can be tokenized and typed based at least in part on the language of each token. The character types can be adjusted if appropriate for the languages, and the tokens can be further segmented using a dictionary for the respective language types. Once appropriate tokens are determined, relevant synonyms in each appropriate language can be determined and typed accordingly. If necessary the case of the tokens and synonyms can be adjusted and further segmented based on punctuation. The terms and synonyms then can be used as part of the index or as part of the search query to include other terms or phrases based on relevance to the original information.

Multi-language relevance-based indexing and search

Growing community of inventors

Beijing, China

Peng Kang