The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 05, 2020
Filed:
Dec. 13, 2016
China National Petroleum Corporation, Beijing, CN;
Cnpc Engineering Technology R&d Company Limited, Beijing, CN;
Binggui Xu, Beijing, CN;
Hongwei Yin, Beijing, CN;
Huijuan Guo, Beijing, CN;
Zhitong Liu, Beijing, CN;
Mingjie Lv, Beijing, CN;
Jianli Wang, Beijing, CN;
Qiang Li, Beijing, CN;
Peng Kang, Beijing, CN;
Tao Jia, Beijing, CN;
Xue Wang, Beijing, CN;
Yi Tian, Beijing, CN;
Aiguo Wang, Beijing, CN;
China National Petroleum Corporation, Beijing, CN;
CNPC Engineering Technology R&D Company Limited, Beijing, CN;
Abstract
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.