Schlumberger Technology Corporation

Terry Dammel

Robert Lynn Williams

Emmanuel Therond

Mitchell Gentry

A flexible cement stable at high temperatures contains an extender that is a finely ground polyetheretherketone. The cement retains its flexibility for long times at high temperatures, for example those used for steam assisted gravity drainage of heavy oil formations, for example from about 480 to about 644&#xb0; F. (249 to 340&#xb0; C.). Compressive strength, tensile strength, permeability and porosity are all stable and suitable for high temperature down-hole oilfield use.

Polymeric extenders for flexible cement

Method for cementing a well comprising a hydraulic cement, water, carbon fiber and graphite are provided. The synergy achieved from combining fibers and particulates into the same sample results in a composite slurry with improved electrical properties and easy-to-optimize rheologies. Method for measuring resistivity through casing thanks to the nature of the cement composition is also provided.

Conductive cement formulation and application for use in well

The invention provides a cement slurry composition for cementing a well comprising a hydraulic cement, water, carbon fiber and graphite. Compositions of the current invention combine the benefits obtained from adding carbon fiber and graphite to the cement composite. The synergy achieved from combining fibers and particulates into the same sample results in a composite slurry with improved electrical properties and easy-to-optimize rheologies.

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Houston, TX, United States of America

Terry Dammel