Wells – Processes – Heating – cooling or insulating
Reexamination Certificate
2006-05-16
2006-05-16
Neuder, William P. (Department: 3672)
Wells
Processes
Heating, cooling or insulating
C166S057000, C174SDIG033
Reexamination Certificate
active
07044223
ABSTRACT:
A method for manufacturing an electrical cable provides an electrical cable suitable for use in heating wells. An elastomeric jacket is extruded over insulated conductors. A stainless steel plate is rolled around the jacket to form a cylindrical coiled tubing having a seam. The seam is welded, then the tubing is swaged down to a lesser diameter to cause the tubing to frictionally grip the jacket. A recess maybe formed in the jacket adjacent the seam to avoid heat damage from the welding process.
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Cox Don C.
Dalrymple Larry V.
Neuroth David H.
Wallace Thomson H.
Wilbourn Phillip R.
Baker Hughes Incorporated
Bracewell & Giuliani LLP
Neuder William P.
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