Water-soluble and biodegradable copolymers on a polyamide basis and use thereof
AssigneeBASF Construction Polymers GmbH
InventorsMartin Matzinger, Roland Reichenbach-Klinke, Gregor Keilhofer, Johann Plank, Christian Spindler
Life of this patent
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Abstract
Copolymers based on a polyamide containing at least one graft lateral chain consisting of ethylenic unsaturated compounds, in construction chemistry, as well as with the prospecting, exploiting and completion of oil-and gas deposits and with deep bore holes.
Claims31
1-13. (canceled)
A process comprising preparing a composition by admixing a hydraulic binding agent and a polyamide-based copolymer having a polyamide component and at least one grafted side chain formed from an ethylenic unsaturated compound.
A process comprising cementing at least one of an oil or gas well by adding a polyamide-based copolymer having a polyamide component and at least one grafted side chain formed from an ethylenic unsaturated compound
A process comprising preparing a drilling fluid by admixing a polyamide-based copolymer having a polyamide component and at least one grafted side chain formed from an ethylenic unsaturated compound with at least one drilling fluid additive.
A process comprising drilling at least one of an oil or a gas well by adding a polyamide-based copolymer having a polyamide component and at least one grafted side chain formed from an ethylenic unsaturated compound during the drilling.
A method of preventing fluid loss in a drilling fluid comprising adding a sufficient amount of a polyamide-based copolymer having a polyamide component and at least one grafted side chain formed from an ethylenic unsaturated compound to a drilling fluid to inhibit or prevent fluid loss from the drilling fluid.
A method of preventing fluid loss in an oil or gas well cement comprising adding a sufficient amount of a polyamide-based copolymer having a polyamide component and at least one grafted side chain formed from an ethylenic unsaturated compound to a drilling fluid to prevent fluid loss from the oil or gas well cement.
A method of completing an underground oil or gas deposit comprising adding a polyamide-based copolymer having a polyamide component and at least one grafted side chain formed from an ethylenic unsaturated compound.
A method of deep drilling comprising adding a polyamide-based copolymer having a polyamide component and at least one grafted side chain formed from an ethylenic unsaturated compound during the deep drilling.
Dependencies are inferred from the claim text.