Schlumberger Technology Corporation

Eni S.p.a.

Politecnico Di Torino

Matteo Pavese

Simone Musso

Stefano Carminati

Massimo Zampato

Mickael Allouche

Mariangela Lombardi

Luca Lavagna

Tubular structures for use in a subsea environment and a method of manufacturing the same are provided. These composite tubular structures can be used in the oil and gas industry, for example, as production risers.

Composite tubular element and relevant manufacturing method

Methods of preparing dispersions of carbon-based materials are disclosed herein. In some embodiments, a method comprises exposing the carbon-based material to an atmosphere comprising between about 0.5% v/v and about 5.0% v/v of oxygen for a selected time at an oxidation temperature to obtain a thermally oxidized material; and dispersing the thermally oxidized material in a liquid medium.

Process for the production of dispersions of thermally oxidised carbon-based materials

Methods may include pumping a cement composition containing one or more conductive fillers into an annular region of a wellbore created between a casing and a surface of the wellbore, allowing the cement composition to cure, emplacing a tool for measuring at least one electromagnetic property into the wellbore, and measuring at least one of the cemented casing and the formation. In another aspect, methods may include preparing a cement composition containing one or more conductive fillers, allowing the cement composition to set, and measuring at least one electromagnetic property of the set cement. In yet another aspect, cement compositions may contain a cement, one or more conductive fillers, and a surfactant, wherein the resistivity of the cement composition is less than 10 &#x3a9;*m.

Piezoresistive cement nanocomposites

Growing community of inventors

Gassino Torinese, Italy

Matteo Pavese