C - Chemistry – Metallurgy – 09 – K
Patent
C - Chemistry, Metallurgy
09
K
C09K 8/035 (2006.01) E21B 10/24 (2006.01)
Patent
CA 2599085
The present invention relates to the drilling of oil and gas wells and is directed to a lubricating agent for improving lubricity or reducing torque and drag during a drilling operation. The lubricating agent comprises a wax or a waxy substance or a mixture thereof, including natural and synthetic waxes, and is therefore non-toxic, environmentally friendly and disposable. The lubricating agent is preferably substantially insoluble in hydrocarbons and thus causes minimal negative impact on drilling fluid properties and formation hydrocarbons. The invention also provides a drilling fluid additive for increasing lubricity and optionally reducing seepage losses during a drilling operation. A method of improving lubricity of a drilling fluid or reducing torque and drag during a drilling operation is also described, wherein the lubricating agent of the invention is added to a drilling fluid, either before or during drilling, and the drilling fluid is pumped downhole.
Borden Ladner Gervais Llp
Canadian Energy Services L.p.
Hoskins Terry W.
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