C - Chemistry – Metallurgy – 09 – K
Patent
C - Chemistry, Metallurgy
09
K
C09K 8/32 (2006.01) C09K 8/36 (2006.01)
Patent
CA 2246205
An improved drilling fluid with enhanced anti-settling properties useful for oil well drilling systems is described. The invention includes a process for providing anti-settling properties to oil invert (i.e., water in oil emulsion) based fluids. The drilling fluid/drilling mud invention contains at least one copolymer reaction product of which the reactants comprise at least one ethylenically unsaturated carboxylic compound and at least one alpha-olefin. As an alternative embodiment one or more rheologically-active clays including organoclays and smectite clays in combination with such copolymer reaction product are also added to the drilling fluid. The invention also includes an anti-settling additive comprising a rheologically active clay and the above described copolymer.
Description d'un fluide de forage amélioré possédant de meilleures propriétés anti-sédimentation utiles dans les systèmes de forage de puits. L'invention comprend un procédé permettant de conférer des propriétés anti-sédimentation à des fluides à base d'huile inverse (c.-à-d., émulsion eau-huile). L'invention concernant le fluide de forage/la boue de forage renferme au moins un produit de réaction copolymérique dont les réactifs incluent au moins un composé carboxylique éthylénique non saturé et, au moins, une alpha-oléfine. Une autre utilisation consiste à ajouter également au fluide de forage une ou plusieurs argiles actives sur le plan rhéologique incluant des argiles organiques et smectiques en combinaison avec le produit de réaction copolymérique. L'invention vise aussi un additif anti-sédimentation comprenant une argile active sur le plan rhéologique ainsi que le copolymère décrit précédemment.
Gambino James
Mcnally Keith
Nae Hemi
Rheox Inc.
Sim & Mcburney
LandOfFree
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