US 11,053,752 B2
Coiled tubing power cable with varying inner diameter
John Mack, Catoosa, OK (US); Kenneth O'Grady, Collinsville, OK (US); James Christopher Clingman, Broken Arrow, OK (US); and Sean A. Cain, Tulsa, OK (US)
Assigned to BAKER HUGHES, A GE COMPANY, LLC, Houston, TX (US)
Filed by BAKER HUGHES, A GE COMPANY, LLC, Houston, TX (US)
Filed on Dec. 26, 2018, as Appl. No. 16/232,678.
Claims priority of provisional application 62/623,030, filed on Jan. 29, 2018.
Prior Publication US 2019/0234155 A1, Aug. 1, 2019
Int. Cl. E21B 17/20 (2006.01); E21B 17/00 (2006.01); H01B 9/02 (2006.01); E21B 43/12 (2006.01); H02G 11/00 (2006.01)
CPC E21B 17/206 (2013.01) [E21B 17/003 (2013.01); H01B 9/023 (2013.01); E21B 43/128 (2013.01); H02G 11/006 (2013.01)] 19 Claims
OG exemplary drawing
 
1. An apparatus for supporting and supplying power to an electrical submersible well pump, comprising:
a string of coiled tubing having an upper section and a lower section, the upper section having an outer diameter that is the same as an outer diameter of the lower section;
the upper section and the lower section each having cylindrical bores, the cylindrical bore of the upper section having a smaller inner diameter than the cylindrical bore of the lower section, resulting in a greater wall thickness of the upper section than the lower section;
a power cable installed within the string of coiled tubing, the power cable having an exterior portion radially compressed against the cylindrical bore of the upper section and with the cylindrical bore of the lower section; wherein
the upper section and the lower section of the string of coiled tubing join each other at a coiled tubing junction;
the power cable has an upper portion and a lower portion with a power cable junction below the coiled tubing junction, defining a transition area from the coiled tubing junction to the power cable tubing junction;
the exterior portion of the power cable in the lower portion of the power cable has an outer diameter that is greater than an outer diameter of the exterior portion of the power cable in the upper portion of the power cable; and
the exterior portion of the power cable is radially compressed against the cylindrical bores of the upper and lower sections of the coiled tubing to a greater extent than any radial compression of the exterior portion of the power cable in the transition area.