Cement sealing

A process for cementing a selected part of a well, comprising, determining a surfactant capable of reducing the volumetric shrinkage of an aqueous cement slurry from about 10% to about 75% during setting and hardening, ascertaining the amount of the surfactant necessary to accomplish the reduction in volumetric shrinkage, and injecting the slurry with the necessary amount of surfactant into the selected part of the well.

A process for cementing a selected part of a well, comprising, injecting an aqueous cement slurry into the selected part of the well, the slurry containing a sufficient amount of a selected surfactant to reduce the volumetric shrinkage of the slurry from about 10% to about 75% during setting and hardening, the surfactant thereby functioning to improve the interfacial sealing between the cement and surfaces contacting the cement.

A process for cementing a selected part of a well, comprising, injecting an aqueous cement slurry into the selected part of the well, the slurry containing a sufficient amount of a selected surfactant to reduce the volumetric shrinkage of the slurry from about 10% to about 75% during setting and hardening.