Tetra Technologies, Inc.

Baker Hughes Holdings LLC

Marshall Chiasson

Jeffrey S McKennis

Nam-Sook Bae

Mohammad Hossaini

James R Allensworth

Moctesuma R Trevino

Certain sugars, when exposed to high temperatures, undergo oxidation to produce acidic species. Certain sugar alcohols are also acid precursors. The acidification process is a function of temperature, salinity, pH, and/or the presence of an agent, such as an accelerator or a retarder. The rate of acidification may be controlled within a filter cake breaker fluid in order to achieve a predetermined fluid pH after a selectable period of time. The time controllable nature of the acidification allows the development of filter cake breaker fluids with an engineered activity delay.

Method to generate acidic species in wellbore fluids

Aqueous and substantially anhydrous fluids having particularly low thermal conductivities and variable densities are disclosed. The fluids include: one or more organic and/or inorganic salts and at least one aprotic polar organic solvent, a mixture of aprotic and protic polar organic solvents, and/or a polar organic solvent having both protic and aprotic polar functional group linkages. The fluids optionally include one or more viscosifying agents and are free of cross-linking agents. Methods for formulating and using the fluids are also disclosed.

Thermal insulating fluids

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Spring, TX, United States of America

Marshall Chiasson