Aqueous drilling and packer fluids
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United States of America Patent
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Jun 23, 1987
Issued Date -
N/A
app pub date -
Aug 2, 1985
filing date -
Aug 3, 1984
priority date (Note) -
Expired
status (Latency Note)
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Abstract
Sulphonated polymers and copolymers are used as thinners in aqueous drilling or packer fluids. The sulphonated polymer has polydispersity below 2 and has a low solution viscosity. It is generally a copolymer of beta-acrylamidoalkane sulphonate or allyl sulphonate or other aliphatic sulphonate with an ethylenically unsaturated carboxylic acid, generally acrylic acid.
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