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US 9,752,420 B2Granted
Method of lining an oil well pipe in situ
AssigneeUltraTech International, Inc.
InventorsMark D. Shaw, Matt Clancy, Laurence M. Bierce
Life of this patent
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Abstract
A method of lining a metal oil well pipe in situ, by providing a pipe liner composed of a polymer tube having a fabric or mesh reinforcing layer mechanically bonded to its exterior, inserting the pipe liner into the oil well pipe by adding water or other weighting means into the pipe liner, and opening the pipe liner to allow oil to flow therethrough, thereby expanding the pipe liner composite tightly against the oil well pipe.
Claims4
A method of lining an oil well pipe comprising the steps of:
- producing a pipe liner by mechanically interlocking a reinforcing layer onto a polymer tube, the exterior diameter of said pipe liner being less than the interior diameter of an oil well pipe to be lined;
- temporarily sealing said oil well pipe at a location below a section of said oil well pipe to be lined to block flow of oil through said section of said oil well pipe;
- inserting said pipe liner into said section of said oil well pipe;
- unsealing said oil well pipe to allow said oil to advance through said pipe liner, whereby heat and pressure from said oil advancing through said pipe liner causes said pipe liner to expand against said oil well pipe;
- and
- further comprising the steps of sealing said pipe liner prior to said step of inserting said pipe liner into said oil well pipe, partially filling said pipe liner with a liquid, and unsealing said pipe liner prior to said step of unsealing said oil well pipe.
3 more elements
Dependencies are inferred from the claim text.