Water-based drilling fluids
First Claim
1. A water-based drilling fluid composition comprising water and at least one rheology modifier and/or fluid loss control agent, and at least one other ingredient selected from the group consisting of polymeric additive, inorganic salts, dispersants, shale stabilizers or inhibitors, weighting agents, and finely divided clay particles, depending upon the desired attributes, wherein the rheology modifier and/or the fluid loss control agent comprises carboxymethylated raw cotton linters (CM-RCL) and/or salts thereof, wherein the polymeric additive and/or dispersants exclude polycarboxylic acid having a number average molecular weight not exceeding 3,000 selected from the group consisting of a homopolymer of acrylic acid, a homopolymer of methacrylic acid, a copolymer of acrylic acid and methacrylic acid, and a water-soluble salt of any of the foregoing acids.
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Accused Products
Abstract
A water-based drilling fluid composition includes water and at least one rheology modifier and/or fluid loss control agent, and at least one other ingredient of polymeric additive, inorganic salts, dispersants, shale stabilizers, weighting agents, or finely divided clay particles, depending upon the desired attributes, wherein the rheology modifier and/or the fluid loss control agent comprises carboxymethylated raw cotton linters (CM-RCL) made from the baled raw cotton linters or comminuted raw cotton linters with increased bulk density.
60 Citations
53 Claims
- 1. A water-based drilling fluid composition comprising water and at least one rheology modifier and/or fluid loss control agent, and at least one other ingredient selected from the group consisting of polymeric additive, inorganic salts, dispersants, shale stabilizers or inhibitors, weighting agents, and finely divided clay particles, depending upon the desired attributes, wherein the rheology modifier and/or the fluid loss control agent comprises carboxymethylated raw cotton linters (CM-RCL) and/or salts thereof, wherein the polymeric additive and/or dispersants exclude polycarboxylic acid having a number average molecular weight not exceeding 3,000 selected from the group consisting of a homopolymer of acrylic acid, a homopolymer of methacrylic acid, a copolymer of acrylic acid and methacrylic acid, and a water-soluble salt of any of the foregoing acids.
Specification