Schlumberger Technology Corporation

Hexion Inc.

Fenglou Zou

Timothy Gareth Jones

Li Jiang

Nathan Scott Lawrence

Jan Beetge

The embodiments described herein generally relate to methods and chemical compositions for use with wellbore treatment processes. In one embodiment, a composition is provided comprising a cementitious material, a drilling fluid, or combinations thereof, and an additive composition comprising one or more components selected from the group of an aqueous insoluble lignin, a coke fine, a random tetracopolymer having the formula styrene-butadiene-acrylic-fumaric acid, a polyvinyl acetate, a surfactant composition, and combinations thereof.

Multiple functional wellbore fluid additive

A molecular species is covalently attached to elemental carbon by exposing the carbon to a reaction mixture containing a strong base and a compound of the formula orin which X denotes a covalently attached atom or group capable of forming an Xanion and each Z is a moiety comprising a plurality of atoms, but which does not have a hydrogen atom directly attached to the atom which itself is directly attached to the &#x2014;CHX or &#x2014;CHX group. The carbon substrate may be graphite or carbon nanotubes.

Derivatisation of carbon

A molecular species is covalently attached to elemental carbon by exposing the carbon to a reaction mixture containing a strong base and a compound of the formula (I) or (II) in which X denotes a covalently attached atom or group capable of forming an Xanion and each Z is a moiety comprising a plurality of atoms, but which does not have a hydrogen atom directly attached to the atom which itself is directly attached to the &#x2014;CHX or &#x2014;CHX group. The carbon substrate may be graphite or carbon nanotubes.

Catalytic hydrogenation of a double bond, notably a C&#x2550;C or C&#x2550;N double bond, is carried out using a homogenous catalyst which is a complex of rhodium or other transition metal containing at least one ligand which is a nitrogenous organic base. Preferably the complex is phosphorus-free and the ligand is a bicyclic base having formula where Rand Rare hydrocarbon chains. Rpreferably is a saturated chain of two carbon atoms and Rpreferably is a saturated chain of three to five carbon atoms.

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Edmonton, Canada

Fenglou Zou