Continuously welded capillary tubing over insulated conductor for ESP applications
AssigneeBaker Hughes Holdings LLC
InventorsDavid Livingston, Ignacio Martinez, Kendall Mohler
Life of this patent
Estimating the term…
Abstract
A method for manufacturing a motor lead cable includes the steps of forming one or more motor leads and placing external armor around the one or motor leads. The step of forming each of the one or more motor leads includes providing an insulated conductor, providing an open capillary tube that has opposing sides that have not been joined together, placing the insulated conductor 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.
Claims18
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.
A method for forming a motor lead for use in a motor lead cable or power cable, wherein the method comprises the steps of:
- providing an insulated conductor;
- providing an open capillary tube that has opposing sides that have not been joined together;
- placing the insulated conductor inside the unclosed capillary tube;
- approximating the sides of the unclosed capillary tube around the insulated conductor to exert a compressive force on the insulated conductor;
- and
- welding the sides of the capillary tube together to form a closed capillary tube around the insulated conductor.
A cable for conducting power to an electric submersible pumping system, the cable comprising:
- a plurality of motor leads, wherein each of the plurality of motor leads comprises:
- a conductor;
- an insulator surrounding the conductor;
- a capillary tube surrounding the insulator, wherein the capillary tube includes a seam from closing the capillary tube around the insulator;
- and
- a heat-expanded barrier layer between the capillary tube and the insulator;
- and
- external armor that surrounds the plurality of motor leads.
Dependencies are inferred from the claim text.