Pulsed-Power Drilling System with Integrated Power and Communication Coiled Tubing Conveyance

A coiled tubing for downhole operations comprising:

• a flexible hollow fluid tube having a length and configured to transport drilling fluid the length of the fluid tube, from a first end to a second end;
• and
• a flexible cable conduit;
• wherein the cable conduit extends substantially the length of the fluid tube and comprises one or more cable;
• wherein both the fluid tube and the cable conduit are sufficiently flexible to be rolled onto a spool;
• and
• wherein:
• the cable conduit is a cable tube comprising protective tubing, with the one or more cables disposed therein;
• the cable tube is disposed within the fluid tube;
• and
• the cable tube is anchored to the fluid tube at both ends.

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.