US 12,084,926 B1
Remedying lost circulation
Ahmad A. Amoudi, Al Madinah (SA); and Abdulhadi Almarri, Hafuf (SA)
Assigned to Saudi Arabian Oil Company, Dhahran (SA)
Filed by Saudi Arabian Oil Company, Dhahran (SA)
Filed on Oct. 2, 2023, as Appl. No. 18/479,540.
Int. Cl. E21B 43/34 (2006.01); E21B 21/00 (2006.01)
CPC E21B 21/003 (2013.01) 19 Claims
OG exemplary drawing
 
1. A method comprising:
charging a first solid lost circulation material with a first electrical charge;
flowing the charged first solid lost circulation material into a wellbore formed in a subterranean formation to a loss zone;
charging a second solid lost circulation material with a second electrical charge that is opposite the first electrical charge;
flowing the charged second solid lost circulation material into the wellbore to the loss zone;
allowing the charged second solid lost circulation material to come in contact with and accumulate onto the charged first solid lost circulation material, wherein the accumulated charged first solid circulation material and charged second solid circulation material form a plug in the loss zone;
flowing a plasticizer into the wellbore to the loss zone;
allowing the plasticizer to come in contact with the charged second solid lost circulation material at the loss zone, wherein the plasticizer causes the charged second solid lost circulation material to become deformable and adhesive in response to contacting the charged second solid lost circulation material, wherein the charged second solid circulation material contacted with the plasticizer causes the plug to become malleable and seal the loss zone; and
after the malleable plug seals the loss zone, circulating a fluid through the wellbore to further seal the malleable plug against the loss zone to block fluid flow from the wellbore into the loss zone.