Patent ID: 11920079
Assignee: SCHLUMBERGER TECHNOLOGY CORPORATION
Field: Materials, metallurgy (Chemistry)
Classification: CPC C  E  Y | IPC C  E

Claim 0:
1. A method, comprising:
(a) preparing a composition comprising an aqueous cement slurry and a non-aqueous additive comprising a suspension of an expanding agent comprising calcium oxide, calcined magnesium oxide, or both;
(b) during a well cementing operation, placing the cement slurry in the well such that the cement slurry flows behind a spacer fluid or a drilling fluid, or both;
(c) causing the spacer fluid or the drilling fluid to commingle with the cement slurry, thereby forming an interface; and
(d) curing the cement slurry and the interface, wherein the interface expands or does not shrink upon the curing;
wherein the non-aqueous additive further comprises an emulsifier comprising polysorbates or sorbitan esters, or both; wherein the emulsifier is present in the non-aqueous additive at a concentration between 0.01 wt % and 10 wt %.