Patent ID: 11913295
Assignee: SAUDI ARABIAN OIL COMPANY
Field: Basic materials chemistry (Chemistry)
Classification: CPC C  E | IPC C  E

Claim 9:
10. A method of plugging a lost-circulation zone in a subsurface formation, comprising:
introducing a drillstem comprising a drilling stabilizer into a wellbore during drilling operations, wherein:
the drilling stabilizer comprises a drilling stabilizer body, stabilizer blades, and a pressure sensor, and
the stabilizer blades each comprise a stabilizer body having an inner chamber, a light source positioned within the inner chamber, and a window that is at least partially transparent;

injecting a lost-circulation fluid into the wellbore, wherein the lost-circulation fluid comprises a plurality of lost-circulation particles, each of the lost-circulation particles comprising a lost-circulation additive encapsulated by a photo-sensitive coating;
measuring a pressure differential with the pressure sensor;
providing a pressure signal to the light source of each stabilizer blade, thereby actuating the light source to produce a light beam;
allowing the light beam to radiate outward from the window of each stabilizer blade to contact the photo-sensitive coatings of the plurality of lost-circulation particles, thereby breaking the photo-sensitive coatings and releasing the lost-circulation additives within the lost-circulation fluid; and
allowing the lost-circulation fluid to plug the lost-circulation zone.