Pre-Sressed Insulated Tubing
AssigneeGeneral Machinery Plant of Liaohe Petroleum Exploration Bureau of CNPC
InventorsYaoqing PAN, Yongning WU, Jinli ZHU, Xiaohui ZHANG, Wei ZHANG, Zhenyu XU, Zhenyu JIA, Ji CHEN, Yi WANG
Life of this patent
Estimating the term…
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.
Claims13
A pre-stressed insulated tubing, comprising an inner tube and an outer tube nested outside the inner tube, a closed ring cavity formed between the inner tube and the outer tube, and an insulated casing is arranged in the closed ring cavity.
Dependencies are inferred from the claim text.