Patent ID: 11905458
Assignee: SAUDI ARABIAN OIL COMPANY
Field: Basic materials chemistry (Chemistry)
Classification: CPC C  E | IPC C  E

Claim 9:
10. A method of eliminating or reducing lost circulation in a lost circulation zone from a well, the method comprising:
introducing a lost circulation material (LCM) composition into the well, the LCM composition comprising:
from about 1% to about 15% bwoc of a resin having an epoxy value in a range from 4.5 epoxy equivalents per kilogram of resin to 5.5 epoxy equivalents per kilogram of resin and an epoxy equivalent weight in a range from 170 to 350 grams of resin per epoxy equivalent (g/eq);
from about 0.01% to about 5% bwoc of an emulsifier selected from the group consisting of ethoxylated phenol, sodium salt of modified tall oil fatty amide, carboxylic acid terminated fatty polyamide, modified amidoamine, tall oil fatty acid, oxidized tall oil fatty amidoamine, ether carboxylic acid, and combinations thereof;
from about 0.01% to about 5% bwoc of a crosslinker to crosslink the resin, where the crosslinker comprises at least one amine group;
a cementitious and/or weighting agent;
from about 0.01% to about 0.5% bwoc of a retarder, where the retarder is selected from the group consisting of lignosulfonates, organic acids, phosphonic acid derivatives, copolymers of 2-acrylamido-2-methylpropane sulfonic acid (“AMPS”) and unsaturated carboxylic acids, inorganic borate salts, and combinations thereof;
from about 0.1% to about 2.0% bwoc of a dispersant; and
from about 0.001% to about 0.5% bwoc of a silicon-based defoamer,
wherein the LCM composition has a thickening time of from about 3 hours than about 6 hours by reaching a Bearden consistency of 100 Bc in a lost circulation zone of 4000 psi.