Polymeric well completion and remedial compositions and methods
AssigneeHalliburton Energy Services, Inc.
InventorsJiten Chatterji, David D. Onan, Roger S. Cromwell
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Abstract
Polymeric well completion and remedial compositions which form highly pliable and durable impermeable masses of desired rigidity and methods of using the compositions are provided. The compositions are basically comprised of water, a water soluble polymerizable monomer, a polymerization initiator and an oxygen scavenging agent. The compositions are usually foamed and can contain a gelling agent and a solid filler material to increase the density and/or rigidity of the impermeable mass formed and/or a vulcanizable rubber latex, vulcanizing agent and vulcanizing activator to provide durability and other properties.
Claims34
A polymeric composition which forms a pliable and durable impermeable mass for use in well completion or remedial operations comprising:
- water;
- a water soluble polymerizable monomer present in an amount in the range of from about 5% to about 30% by weight of said composition;
- a polymerization initiator present in an amount effective to initiate the polymerization of said polymerizable monomer;
- an oxygen scavenging agent present in an amount effective to remove oxygen from said composition;
- a vulcanizable aqueous rubber latex present in an amount in the range of from &bout 50% to about 80% by weight of said composition;
- a vulcanizing agent present in an amount effective to vulcanize said aqueous rubber latex;
- a vulcanizing activator present in an amount sufficient to initiate the vulcanization of said aqueous rubber latex by said vulcanizing agent;
- a gas present in an amount sufficient to foam said composition;
- a foaming agent Present in an amount effective to facilitate foaming;
- and
- a foam stabilizer present in an amount effective to stabilize said composition when foamed.
A polymeric composition which forms a pliable and durable impermeable mass for use in well completion or remedial operations comprising:
- water;
- a water soluble polymerizable monomer comprising hydroxyethylacrylate present in an amount in the range of from about 5% to about 30% by weight of said composition;
- a polymerization initiator selected from the group of 2,2'-azobis(N,N'-dimethylene isobutyramidine) dihydrochloride, 2,2'-azobis(2-amidinopropane) dihydrochloride, and 2,2'-azobis2-methyl-N-(2-hydroxyethyl) propionamide! present in an amount in the range of from about 0.1% to about 5% by weight of said composition;
- an oxygen scavenger comprised of stannous chloride present in an amount effective to remove oxygen from said composition;
- an aqueous styrene/butadiene latex containing water in an amount of about 50% by weight of said latex and having a weight ratio of styrene to butadiene of about 25%:75% present in an amount in the range of from about 50% to about 80% by weight of said composition;
- a vulcanizing agent comprising sulfur present in an amount effective to vulcanize said aqueous styrene/butadiene latex;
- and
- a vulcanizing activator comprising a mixture of stearic acid and zinc oxide present in an amount sufficient to initiate the vulcanization of said aqueous styrene/butadiene latex by said vulcanizing agent;
- a gas present in an amount sufficient to foam said compositions;
- a foaming agent present in an amount effective to facilitate foaming;
- and
- a foam stabilizer present in an amount effective to stabilizer said composition when foamed.
A method of sealing a subterranean zone penetrated by a well bore comprising the steps of:
- introducing an aqueous composition into said zone which forms a pliable and durable impermeable sealing mass, said composition comprising water, a water soluble polymerizable monomer, a polymerization initiator, an oxygen scavenging agent, a vulcanizable aqueous rubber latex, a vulcanizing agent and a vulcanizing activator;
- and then
- causing said monomer to polymerize and said rubber latex to vulcanize.
A method of sealing a subterranean zone penetrated by a well bore comprising the steps of introducing an aqueous composition into said zone which forms a pliable and durable impermeable sealing mass, said composition comprising:
- water;
- a water soluble polymerizable monomer comprising hydroxethylacrylate present in an amount in the range of from about 5% to about 30% by weight of water in said composition;
- a polymerization initiator selected from the group of 2,2'-azobis(N,N'-dimethylene isobutyramidine) dihydrochloride, 2,2'-azobis(2-amidinopropane) dihydrochloride, and 2,2'-azobis2-methyl-N-(2-hydroxyethyl) propionamide! present in an amount in the range of from about 0.1% to about 5% by weight of said composition;
- an oxygen scavenger comprising stannous chloride present in an amount effective to remove oxygen from said composition;
- an aqueous styrene/butadiene latex containing water in an amount of about 50% by weight of said latex and having a weight ratio of styrene to butadiene of about 25%:75% present in an amount in the range of from about 50% to about 80% by weight of said composition;
- a vulcanizing agent comprising sulphur present in an amount effective to vulcanize said aqueous rubber latex;
- a vulcanizing activator comprising a mixture of stearic acid and zinc oxide present in an amount defective to initiate the vulcanization of said aqueous rubber latex by said vulcanizing agent;
- and then
- causing said monomer to polymerize and said rubber latex to vulcanize.
Dependencies are inferred from the claim text.