Saudi Arabian Oil Company

Durham University

M-i Drilling Fluids UK Limited

Mona Al Batal

Gasan Selman Alabedi

Andrew Whiting

Hugh Christopher Greenwell

John Adrian Hall

Michael Hayward Hodder

Musarrat Halima Mohammed

Manohara Gudiyor Veerabhadrappa

Oil-based drilling fluid compositions comprising an oil phase comprising a base oil, an aqueous phase comprising water, at least one emulsifier, and one or more additives. The at least one emulsifier comprises an amino amide comprising the formula R&#x2014;CO&#x2014;NH&#x2014;R'&#x2014;NH&#x2014;R&#x2033;&#x2014;NH, where R is a fatty acid alkyl and R&#x2032; and R&#x2033; are alkyl groups. The one or more additives are chosen from a wetting agent, a rheology modifier, a fluid-loss control additive, and a weighting additive. Methods of making the oil-based drilling fluid compositions and methods of drilling a subterranean well utilizing the oil-based drilling fluid compositions are also provided.

Oil-based drilling fluids for high pressure and high temperature drilling operations

Oil-based drilling fluid compositions comprising an oil phase comprising a base oil, an aqueous phase comprising water, at least one emulsifier, and one or more additives. The at least one emulsifier comprises an amino amide comprising the formula R&#x2014;CO&#x2014;NH&#x2014;R'&#x2014;NH, where R is a fatty acid alkyl and R&#x2032; is an alkyl group. The one or more additives are chosen from a wetting agent, a rheology modifier, a fluid-loss control additive, and a weighting additive. Methods of making the oil-based drilling fluid compositions and methods of drilling a subterranean well utilizing the oil-based drilling fluid compositions are also provided.

Embodiments for an oil-based drilling fluid and methods of making the oil-based drilling fluid are provided, in which the oil-based drilling fluid comprising: an oil phase; an aqueous phase; at least one surfactant, in which at least one surfactant comprises a carboxylic acid having 10 or more glycol repeating units; and optionally, at least one emulsifying agent.

Thermally stable surfactants for oil based drilling fluids

Embodiments are directed to a surfactant of formula (I) and incorporation of one or more surfactants into drilling fluids. The surfactant having the following structure: 

The present application discloses drilling fluid compositions, methods for making drilling fluids, and methods for drilling subterranean wells utilizing the drilling fluids. According to one embodiment, a drilling fluid composition may include an oil phase, an aqueous phase, an emulsifier, and a rheology modifier. The emulsifier may include an amino amide, and the rheology modifier may include a layered double hydroxide, such as Mg/Al-Myristate layered double hydroxide.

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