Baker Hughes, a Ge Compnay, LLC

Baker Hughes Corporation

Guido Gustavo Narvaez

Mark Alan Vorderbruggen

Dong Shen

Diana Cardona

Angela Anh Doan

Matthew Grady Kellum

The disclosure relates to a method of delaying viscosification of a well treatment fluid within a well by introducing into the well a cement slurry containing particulates of a hydratable viscosifying agent having a minimum of 90% retention on a 20 mesh screen. The presence of the hydratable viscosifying agent in the slurry prevents settling of the cement after the slurry is pumped into the well. The stability of the slurry is thus enhanced by the presence of the hydratable viscosifying agent.

Method of enhancing stability of cement slurries in well cementing operations

A wellbore cement composition includes substantially unhydrated cement powder and additive powder for cement. The additive powder is formulated from ingredients including a liquid additive for cement and solid carrier particles. The liquid additive is absorbed by the solid carrier particles. A wellbore cementing method includes using a dry cement composition, adding water to the dry cement composition, forming a cement slurry, placing the slurry in a wellbore, and setting the placed slurry. The dry cement composition contains substantially unhydrated cement powder and retarder powder for cement. The retarder powder contains a retarder absorbed by solid carrier particles.

Wellbore cement compositions and wellbore cementing methods

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Houston, TX, United States of America

Guido Gustavo Narvaez