US 12,276,165 B2
Lost circulation eutectoid alloy downhole deployment tool
Graham Richard Hitchcock, Aberdeenshire (GB); and Arthur Hale, Angleton, TX (US)
Assigned to SAUDI ARABIAN OIL COMPANY, Dhahran (SA)
Filed by SAUDI ARABIAN OIL COMPANY, Dhahran (SA)
Filed on May 31, 2023, as Appl. No. 18/326,090.
Prior Publication US 2024/0401421 A1, Dec. 5, 2024
Int. Cl. E21B 36/04 (2006.01); E21B 10/42 (2006.01); E21B 21/00 (2006.01); E21B 33/138 (2006.01); E21B 36/00 (2006.01)
CPC E21B 21/003 (2013.01) [E21B 33/138 (2013.01); E21B 36/00 (2013.01); E21B 36/04 (2013.01); E21B 10/42 (2013.01)] 14 Claims
OG exemplary drawing
 
7. A method for repairing lost circulation conditions during drilling operations comprising:
deploying a deployment tool attached to a drill string to a lost circulation zone;
charging an alloy charge area with a plurality of eutectic pellets;
activating a deployment tool heater while continuously rotating the drill string and pumping a drilling fluid;
melting the eutectic pellets in the deployment tool attached to the drill string to flow melted eutectic metal alloy through a plurality of crucible jet ports to a targeted location in the lost circulation zone;
removing the deployment tool while simultaneously monitoring drill string torque; and
milling excess material from a plurality of eutectic patches formed from cured eutectic metal alloy.