Degradable polymer compositions and uses thereof
AssigneeISP Investments Inc.
InventorsOsama M. Musa, Cuiyue Lei
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Abstract
The invention relates to novel polymers derived from: (A) at least one N-vinyl amide-based unit and/or at least one acrylamide-based unit, and (B) at least one unit comprising: (i) at least one hydroxyl group, and/or (ii) at least one functional group convertible to a hydroxyl group wherein at least one group is converted to hydroxyl functionality in the final polymer product, wherein the polymer comprises at least one ester group. The polymers and compositions are used in oilfield applications, such as an inhibitor of gas hydrates and/or a kinetic inhibitor of gas hydrates. The polymer can assume alternating, block, and/or random configurations of the repeating units, with at least one ester group.
Claims27
A polymer derived at least from:
- (A) from about 1% to about 99% of at least one N-vinyl amide-based unit and/or at least one acrylamide-based unit, and (B) from about 11.6% to about 99% of at least one unit comprising:
- (i) at least one hydroxyl group, and/or
- (ii) at least one functional group convertible to a hydroxyl group wherein at least one group is converted to hydroxyl functionality in the final polymer product;
- wherein said polymer comprises from about 1% to about 99% of at least one ester group, and wherein said polymer is not poly(N-vinyl-2-pyrrolidone)-block-polyester copolymers or other diblock and triblock copolymer consisting of poly(N-vinyl-2-pyrrolidone) as one block.
A composition comprising a polymer derived at least from (A) from about 1% to about 99% of at least one N-vinyl amide-based unit and/or at least one acrylamide-based unit, and (B) from about 11.6% to about 99% of at least one unit comprising:
- (iii) at least one hydroxyl group, and/or
- (iv) at least one functional group convertible to a hydroxyl group wherein at least one group is converted to hydroxyl functionality in the final polymer product;
- wherein said polymer comprises from about 1% to about 99% of at least one ester group, and wherein said polymer is not poly(N-vinyl-2-pyrrolidone)-block-polyester copolymers or other diblock and triblock copolymer consisting of poly(N-vinyl-2-pyrrolidone) as one block in adhesive, agriculture, cleaning, coating, dental, encapsulation, imaging, household/industrial/institutional, medical, membrane, oilfield, oral care, packaging, personal care, pharmaceutical, printing, or veterinary applications.
A method for preventing, retarding, and/or reducing the formation and/or growth of gas hydrates that comprises:
- (I) selecting a polymer derived from:
- (A) from about 1% to about 99% of at least one N-vinyl amide-based unit and/or at least one acrylamide-based unit, and
- (B) from about 11.6% to about 99% of at least one unit comprising:
- (i) at least one hydroxyl group, and/or
- (ii) at least one functional group convertible to a hydroxyl group wherein at least one group is converted to hydroxyl functionality in the final polymer product;
- wherein said polymer comprises from about 1% to about 99% of at least one ester group, and wherein said polymer is not poly(N-vinyl-2-pyrrolidone)-block-polyester copolymers or other diblock and triblock copolymer consisting of poly(N-vinyl-2-pyrrolidone) as one block;
- and
- (II) introducing a composition comprising said polymer into a petroleum-containing fluid from about 0.01% to about 3% by weight of the water present in the fluid being treated.
Dependencies are inferred from the claim text.