Schlumberger Technology Corporation

W. R. Grace Co.-conn.

Peter V Coveney

Neal Steven Berke

Felek Jachimowicz

Ralph Michael D'Angelo

Paul J Sandberg

Josephine H Cheung

David F Myers

Thomas J Plona

Frank G Serafin

Michael Watkinson

Lawrence M Schwartz

Edo S Boek

Andrew Whiting

Joanna D Blanchard

A novel methodology for rapid, cost-efficient discovery, identification, or improvement of additives and/or admixtures for hydratable cementitious compositions. Multiple formulations comprising hydratable cementitious compositions are deposited into a plurality of receptacles. A first assay output is obtained, such as through x-ray diffraction, which is then correlated to provide a second assay output value corresponding to physical or chemical properties of the cementitious compositions.

Assay methods for hydratable cementitious compositions

A method of stabilizing a clayey geological formation surrounding a hydrocarbon well is described. It comprises the step of treating the formation with a first reactant and a second reactant, characterized in that a reaction of said first and said second reactant is essentially initiated in the presence of clayey material. The reaction can be characterized by substrate intercalation or condensation stabilization with no pH adjustment or stabilization through reaction of glycol with a carbonyl group containing second reactant or a reaction involving an epoxide ring opening under neutral or acidic conditions.

Stabilizing clayey formations

A method and apparatus for determining the setting time of a cement slurry. An acoustic shear wave signal is generated and introduced at a first location in the slurry. The signal is monitored at a second location for direct transmission of the shear wave signal. The time of first detection is determined at the second location which is taken as the setting time of the slurry.

Method for measuring cement thickening times

Growing community of inventors

Woodford Green, United Kingdom

Peter V Coveney