US 12,404,728 B2
Insulated coiled tubing for pulsed power drilling
Nagaraja K. Pai, Houston, TX (US); Lucas Samuel Batista Santos, Houston, TX (US); and Radovan Rolovic, Houston, TX (US)
Assigned to Halliburton Energy Services, Inc., Houston, TX (US)
Filed by Halliburton Energy Services, Inc., Houston, TX (US)
Filed on Sep. 5, 2023, as Appl. No. 18/461,068.
Prior Publication US 2025/0075569 A1, Mar. 6, 2025
Int. Cl. E21B 17/20 (2006.01); E21B 7/15 (2006.01)
CPC E21B 17/206 (2013.01) [E21B 7/15 (2013.01)] 20 Claims
OG exemplary drawing
 
16. A method comprising:
attaching a cable to an inside surface of a coiled tubing, the cable extending approximately an entire length of the coiled tubing, the cable capable of carrying electrical power from a borehole opening to a pulsed power drilling apparatus in a bottom hole assembly (BHA) at the bottom of the borehole; and
applying insulation to a surface of substantially the entire length of coiled tubing, wherein applying the insulation includes applying one or more layers of a coating, the coating, when cured, including at least 50 percent Hydro-NM-Oxide.