US 12,331,641 B2
Pulsed-power drilling system with integrated power and communication coiled tubing conveyance
Nagaraja K. Pai, Houston, TX (US); Robert Charles De Long, Tulsa, OK (US); Wei Zhang, Houston, TX (US); and Lucas Samuel Batista Santos, Houston, TX (US)
Assigned to Halliburton Energy Services, Inc., Houston, TX (US)
Filed by Halliburton Energy Services, Inc., Houston, TX (US)
Filed on Sep. 11, 2023, as Appl. No. 18/244,729.
Prior Publication US 2025/0084706 A1, Mar. 13, 2025
Int. Cl. E21B 7/15 (2006.01); E21B 17/02 (2006.01)
CPC E21B 7/15 (2013.01) [E21B 17/028 (2013.01)] 20 Claims
OG exemplary drawing
 
18. A method of drilling a wellbore, comprising:
connecting a tool string having a pulsed-power drill bit to a downhole end of coiled tubing, wherein the coiled tubing comprises:
a flexible hollow fluid tube having a length and configured to transport drilling fluid therein; and
a flexible cable tube disposed within the fluid tube, wherein the cable tube extends substantially the length of the fluid tube and comprises one or more cable disposed within protective tubing;
deploying the coiled tubing downhole;
providing power to the tool string downhole via the coiled tubing;
providing drilling fluid to the tool string downhole via the coiled tubing; and
drilling the wellbore using the pulsed-power drill bit;
wherein drilling fluid and power are simultaneously provided downhole through the coiled tubing, with the protective tubing protecting the one or more cable from the drilling fluid within the fluid tube as the one or more cable transmits power; and
wherein deploying the coiled tubing downhole comprises deploying an amount of coiled tubing sufficient to reach a desired drilling depth from a spool of coiled tubing at a surface of the wellbore, and wherein providing power comprises selecting an amount of power based on the length of the coiled tubing deployed downhole.