US 11,725,468 B2
Electrically conductive fiber optic slickline for coiled tubing operations
Joseph Varkey, Sugar Land, TX (US); David Geehyun Kim, Stafford, TX (US); and Maria Auxiliadora Grisanti, Stafford, TX (US)
Assigned to SCHLUMBERGER TECHNOLOGY CORPORATION, Sugar Land, TX (US)
Appl. No. 15/546,207
Filed by SCHLUMBERGER TECHNOLOGY CORPORATION, Sugar Land, TX (US)
PCT Filed Jan. 26, 2015, PCT No. PCT/US2015/012918
§ 371(c)(1), (2) Date Nov. 14, 2017,
PCT Pub. No. WO2016/122446, PCT Pub. Date Aug. 4, 2016.
Prior Publication US 2018/0073310 A1, Mar. 15, 2018
Int. Cl. E21B 17/20 (2006.01); G02B 6/44 (2006.01); E21B 47/12 (2012.01); E21B 47/135 (2012.01)
CPC E21B 17/206 (2013.01) [E21B 47/12 (2013.01); E21B 47/135 (2020.05); G02B 6/4416 (2013.01); G02B 6/4427 (2013.01)] 18 Claims
OG exemplary drawing
 
13. A method of performing a coiled tubing application at a location in a well at an oilfield, the method comprising:
pumping a fiber optic cable through a flow path of a coiled tubing;
physically coupling a downhole tool to the coiled tubing;
communicatively coupling a polymer jacketed fiber optic thread through a void space defined by a conduit of the fiber optic cable to the downhole tool to support optical telemetric communications between the downhole tool and surface equipment at the oilfield;
powerably coupling a plurality of coaxial, electrically conductive members adjacent the conduit of the fiber optic cable to the downhole tool to provide dedicated power thereto from the surface equipment, wherein the plurality of coaxial electrically conductive members are helically wound about the conduit and un-insulated relative to the conduit, wherein the fiber optic cable comprises an insulating polymer layer over the plurality of coaxial, electrically conductive members, a single metal based cladding layer extending circumferentially about the insulating polymer layer, and wherein the metal based cladding layer has a thickness such that the metal based cladding layer provides a durable shell for the insulating polymer layer;
advancing the downhole tool to the location with the coiled tubing; and
performing the coiled tubing application at the location.