Patent ID: 11970423
Assignee: SAUDI ARABIAN OIL COMPANY
Field: Materials, metallurgy (Chemistry)
Classification: CPC C | IPC C  E

Claim 15:
16. A method for cementing a wellbore, the method comprising:
dispensing a cement composition into an annulus defined between a tubular string and an inner wall of a wellbore or between two tubular strings, where:
the cement composition comprises a cement precursor, water, and from 0.1 percent by weight of cement (BWOC) to 10 percent BWOC cement retarder;
the cement retarder comprises a hydrocarboxylic acid derivative that comprises at least one hydroxyl group and at least one carboxyl group; and
the cement precursor comprises tricalcium silicate, dicalcium silicate, tricalcium aluminate, and tetracalcium alumina ferrite; and

allowing the cement composition to cure in the annulus to form a cured cement, where the cement retarder comprising the hydrocarboxylic acid derivative increases the thickening time of the cement composition to greater than or equal to 4 hours at downhole temperatures greater than or equal to 50° C.