Patents Assigned to General Machinery Plant of Liaohe Petroleum Exploration Bureau of CNPC
  • Pre-sressed insulated tubing
    Patent number: 9027607
    Abstract: The present invention relates to a pre-stressed insulated tubing, including an inner tube (3) and an outer tube (2) nested outside of the inner tube (3), and a closed ring cavity is formed between the inner tube (3) and the outer tube (2), wherein an insulated casing (4) is arranged in the closed ring cavity. The pre-stressed insulated tubing of the present invention features high vacuum degree, high thermal insulation level and long working life, and the insulated casing is reusable for cost saving.
    Type: Grant
    Filed: January 6, 2012
    Date of Patent: May 12, 2015
    Assignee: General Machinery Plant of Liaohe Petroleum Exploration Bureau of CNPC
    Inventors: Yaoqing Pan, Yongning Wu, Jinli Zhu, Xiaohui Zhang, Wei Zhang, Zhenyu Xu, Zhenyu Jia, Ji Chen, Yi Wang
  • Pre-Sressed Insulated Tubing
    Publication number: 20120175007
    Abstract: The present invention relates to a pre-stressed insulated tubing, including an inner tube (3) and an outer tube (2) nested outside of the inner tube (3), and a closed ring cavity is formed between the inner tube (3) and the outer tube (2), wherein an insulated casing (4) is arranged in the closed ring cavity. The pre-stressed insulated tubing of the present invention features high vacuum degree, high thermal insulation level and long working life, and the insulated casing is reusable for cost saving.
    Type: Application
    Filed: January 6, 2012
    Publication date: July 12, 2012
    Applicant: General Machinery Plant of Liaohe Petroleum Exploration Bureau of CNPC
    Inventors: Yaoqing PAN, Yongning WU, Jinli ZHU, Xiaohui ZHANG, Wei ZHANG, Zhenyu XU, Zhenyu JIA, Ji CHEN, Yi WANG