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US 5,039,433 AGranted
Method of using polymers of amido-sulfonic acid containing monomers and salts as drilling additive
AssigneeThe Lubrizol Corporation
InventorsThomas M. Sopko, Richard E. Lorentz
Life of this patent
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Abstract
A method for producing homopolymers and copolymers from amido-sulfonic acid or salt containing monomers in the presence of high energy mechanical mixing utilizing a final stage polymerization temperature of from about 200.degree. F. to below the degradation temperature of the monomer. The process produces a solid homopolymer or copolymer which can be utilized as fluid loss agents.
Claims87
A process, comprising:
- adding to a drill hole at least one homopolymer prepared by the process comprising the steps:
- (i) adding at least one amido-sulfonic acid or salt containing monomer to a reactor, said amido-sulfonic acid or salt containing monomer having the formula:
- ##STR2## wherein:
- R.sup.1 is a hydrocarbyl group having from 1 to about 11 carbon atoms;
- R.sup.2, R.sup.3, R.sup.4 and R.sup.5 are, independently, hydrogen or hydrocarbyl groups, provided that the total number of carbon atoms in R.sup.2, R.sup.3, R.sup.4, and R.sup.5 and 8 carbon atoms or less;
- and M is hydrogen, ammonium, metal cation or mixture thereof:
- (ii) polymerizing said amido-sulfonic acid or salt containing monomer using high energy mechanical mixing, the final stage of step (ii) being conducted at a temperature of from about 200.degree. F. to below the degradation temperature of said monomer.
4 more elements
A process comprising:
- adding to a drill hole at least one amido-sulfonic acid or salt containing copolymer, said copolymer being prepared by the process comprising the steps of;
- (i) adding an amido-sulfonic acid or salt containing monomer and at least one copolymerizable comonomer to a reactor, said amido-sulfonic acid or salt containing monomer having the formula ##STR3## wherein:
- R.sup.1 is a hydrocarbyl group having from 1 to about 11 carbon atoms;
- R.sup.2, R.sup.3, R.sup.4, and R.sup.5 are, independently, hydrogen or hydrocarbyl groups with the proviso that the total number of carbon atoms in R.sup.2, R.sup.3, R.sup.4, and R.sup.5 is 8 carbon atoms or less;
- M is hydrogen, ammonium, metal cation or mixture thereof;
- the amount of said copolymerizable comonomer being from about 0.1% to about 30% by weight based upon the total weight of said amido-sulfonic acid or salt containing monomer and said copolymerizable comonomer;
- and
- (ii) polymerizing said amido-sulfonic acid or salt containing monomer and said copolymerizable comonomer using high energy mechanical mixing to provide said copolymer.
5 more elements
Dependencies are inferred from the claim text.