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US 2014/0175789 A1Published application
Insulated tubing for downhole applications
OwnerJohn Arthur, Denis Gilbert +1inventors
InventorsJohn Arthur, Denis Gilbert, Arnoud Struyk
Life of this patent
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Abstract
An insulated tubing member of an insulated tubing string includes inner and outer tubing. Solid insulating material is provided in an annular cavity between the inner and outer tubing and a slip joint is provided between adjacent insulated tubing members to accommodate differential expansion of the inner and outer tubing.
Claims18
An insulated tubing member comprising:
- an inner tubing received in an outer tubing, the inner tubing coupled to the outer tubing by an upstream fitting located at an upstream end of the insulated tubing member and a downstream fitting located at a downstream end of the insulated tubing member;
- insulating material received in an annular cavity delimited by the inner tubing, the outer tubing, the upstream fitting and the downstream fitting;
- a slip joint between the inner tubing and the outer tubing to allow for axial movement of the inner tubing relative to the outer tubing;
- and
- wherein the axial movement is due to thermal expansion.
2 more elements
Dependencies are inferred from the claim text.