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US 12,492,443 B2Granted
Heat treated coiled tubing
AssigneeTenaris Coiled Tubes, LLC
InventorsMartin Valdez, Jorge Mitre
Life of this patent
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Abstract
Embodiments of a method of heat treating a coiled tube, in particular coiled tubes for use in the oil and gas industry, and pipes produced from the methods. In particular, embodiments of the heat treating method can utilized tempering without bending in order to avoid the generation of subsequent defects.
Claims9
A method of heat treating a tubing comprising:
- providing the tubing in an uncoiled configuration;
- heating the tubing in the uncoiled configuration to a temperature above Ac3;
- quenching the tubing in the uncoiled configuration;
- tempering the tubing in the uncoiled configuration to a yield strength of about 140 ksi or below without bending, wherein the tempering is executed in a straight tube heat treatment;
- and
- coiling the tubing after the tempering.
3 more elements
A method of heat treating a coiled tubing, the coiled tubing comprising a pipe, wherein the method comprises:
- unspooling the coiled tubing;
- heating the unspooled coiled tubing to a temperature above Ac3;
- quenching the unspooled coiled tubing;
- and
- tempering the unspooled coiled tubing to a yield strength of 140 ksi or below without bending, and wherein the tempering is executed in a straight tube heat treatment.
2 more elements
A method of heat treating a tubing, wherein the tubing comprises a pipe, wherein the method comprises:
- providing the pipe in an uncoiled configuration;
- heating and quenching the pipe in the uncoiled configuration;
- and
- tempering the pipe in the uncoiled configuration to a yield strength of 140 ksi or below and without any bending of the pipe during the tempering, wherein the tempering is the total tempering of the pipe, wherein the yield strength of the pipe as-tempered is less than the yield strength of the pipe as-quenched, and wherein the tempering is executed in a straight tube heat treatment.
1 more element
Dependencies are inferred from the claim text.