US 12,191,744 B2
Continuously welded capillary tubing over insulated conductor for ESP applications
David Livingston, Claremore, OK (US); Ignacio Martinez, Tulsa, OK (US); and Kendall Mohler, Claremore, OK (US)
Assigned to Baker Hughes Holdings LLC, Houston, TX (US)
Filed by Baker Hughes Holdings LLC, Houston, TX (US)
Filed on Dec. 20, 2021, as Appl. No. 17/556,418.
Prior Publication US 2023/0198335 A1, Jun. 22, 2023
Int. Cl. H02K 5/22 (2006.01); H02K 15/00 (2006.01); H02K 15/10 (2006.01)
CPC H02K 5/225 (2013.01) [H02K 15/0062 (2013.01); H02K 15/10 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A method for manufacturing a motor lead cable, the method comprising the steps of:
forming one or more motor leads, wherein the step of forming each of the one or more motor leads comprises:
providing an insulated conductor;
enclosing the insulated conductor with a foamable barrier layer constructed from a heat-expandable material;
providing an open capillary tube that has opposing sides that have not been joined together;
placing the insulated conductor and barrier layer inside the unclosed capillary tube;
approximating the sides of the unclosed capillary tube around the insulated conductor; and
welding the sides of the capillary tube together to form a closed capillary tube around the insulated conductor; and
placing external armor around the one or motor leads.