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US 6,387,853 B1Granted
Derivatization of polymers and well treatments using the same
AssigneeBJ Services Company
InventorsJeffrey C. Dawson, Subramanian Kesavan, Hoang V. Le
Life of this patent
Estimating the term…
Abstract
Polymers are derivatized and then may be introduced into a wellbore, such as in a hydraulic fracturing treatment. A polymer may be a guar powder that is mixed with a organic solvent and derivatized using a derivatizing agent, such as sodium chloroacetate. The polymer is typically derivatized in bulk prior to introduction into the wellbore. The derivatized polymer may be hydrated and/or crosslinked prior to introduction into the wellbore.
Claims53
A method for forming derivatized polymer material in a slurry, comprising:
- combining an organic solvent based slurry containing polymer material with a basic compound or alkaline material at ambient temperature to activate derivatizing sites on the polymer material;
- then combining said slurry containing polymer material with a derivatizing agent at ambient temperature to cause at least partial mixing to occur between said polymer material and said derivatizing agent;
- and
- allowing said polymer material and said derivatizing agent to at least partially react with no heating to form derivatized polymer material contained in said slurry;
- wherein said slurry containing polymer material is combined with said basic compound or alkaline material prior to combination of said slurry containing polymer material with said derivatizing agent;
- wherein said polymer material comprises a hydratable polysaccharide, hydratable derivatized polysaccharide, or a mixture thereof;
- and
- wherein said organic solvent based slurry comprises a hydrocarbon solvent that is at least one of diesel, kerosene, refined aliphatic oil, or a mixture thereof.
5 more elements
A method for treating a well, comprising:
- combining a polymer material with an organic solvent to form a polymer-containing slurry;
- then combining said polymer-containing slurry with a basic compound or alkaline material at ambient temperature to activate derivatizing sites on the polymer material;
- then combining said polymer-containing slurry with a derivatizing agent at ambient temperature to cause at least partial mixing to occur between said polymer material and said derivatizing agent;
- allowing said polymer material and said derivatizing agent to react to form a derivatized polymer-containing slurry;
- combining said derivatized polymer-containing slurry with an aqueous solution, wherein said polymer material interacts with said aqueous solution to form a hydrated derivatized polymer-containing treatment fluid;
- and
- introducing said treatment fluid into said well;
- wherein said polymer-containing slurry is combined with said basic compound or alkaline material prior to combination of said polymer-containing slurry with said derivatizing agent.
5 more elements
A method for treating a well, comprising:
- combining a guar material with a hydrocarbon solvent to form a slurry containing guar material;
- then combining said slurry containing guar material with a basic compound or alkaline material at ambient temperature to activate derivatizing sites on the polymer material;
- then combining said slurry containing guar material with a derivatizing agent at ambient temperature to cause at least partial mixing to occur between said guar material and said derivatizing agent;
- allowing said guar material and said derivatizing agent to react to form derivatized guar material contained in said slurry;
- then combining said slurry containing derivatized guar material with an aqueous solution to form a treatment fluid, wherein said derivatized guar material interacts with said aqueous solution to form hydrated derivatized guar contained in said treatment fluid;
- and
- then introducing said treatment fluid into said well;
- wherein said slurry containing guar material is combined with said basic compound or alkaline material prior to combination of said slurry containing guar material with said derivatizing agent.
5 more elements
A method for forming derivatized polymer material in a slurry, comprising:
- combining an organic solvent based slurry containing polymer material with a basic compound or alkaline material at ambient temperature to activate derivatizing sites on the polymer material;
- then combining said slurry containing polymer material with a derivatizing agent at ambient temperature to cause at least partial mixing to occur between said polymer material and said derivatizing agent;
- and
- allowing said polymer material and said derivatizing agent to react to form derivatized polymer material contained in said slurry;
- wherein said slurry containing polymer material is combined with said basic compound or alkaline material prior to combination of said slurry containing polymer material with said derivatizing agent;
- and
- wherein said first two combining steps and said allowing step occur offsite, and further comprising storing said slurry containing derivatized polymer material for transportation and later onsite use.
4 more elements
A method for forming derivatized polymer material, comprising:
- combining a polymer material with a basic compound or alkaline material at ambient temperature to activate derivatizing sites on the polymer material;
- then combining said polymer material with a derivatizing agent at ambient temperature to cause at least partial mixing to occur between said polymer material and said derivatizing agent;
- and
- allowing said polymer material and said derivatizing agent to at least partially react with no heating to form derivatized polymer material;
- wherein said polymer material is combined with said basic compound or alkaline material prior to combination of said polymer material with said derivatizing agent;
- and
- wherein said polymer material comprises at least one of guar, derivatized guar, derivatized cellulose, starch, or a mixture thereof.
4 more elements
A method for forming derivatized polymer material in a slurry, comprising:
- combining an organic solvent based slurry containing polymer material with a basic compound or alkaline material at ambient temperature to activate derivatizing sites on the polymer material;
- then combining said slurry containing polymer material with a derivatizing agent at ambient temperature to cause at least partial mixing to occur between said polymer material and said derivatizing agent;
- and
- allowing said polymer material and said derivatizing agent to at least partially react with no heating to form derivatized polymer material contained in said slurry;
- wherein said slurry containing polymer material is combined with said basic compound or alkaline material prior to combination of said slurry containing polymer material with said derivatizing agent;
- and
- wherein said organic solvent based slurry comprises a hydrocarbon solvent that is at least one of diesel, kerosene, refined aliphatic oil, or a mixture thereof.
4 more elements
A method for forming derivatized polymer material in a slurry, comprising:
- combining an organic solvent based slurry containing polymer material with a basic compound or alkaline material at ambient temperature to activate derivatizing sites on the polymer material;
- then combining said slurry containing polymer material with a derivatizing agent at ambient temperature to cause at least partial mixing to occur between said polymer material and said derivatizing agent;
- and
- allowing said polymer material and said derivatizing agent to at least partially react with no heating to form derivatized polymer material contained in said slurry;
- wherein said slurry containing polymer material is combined with said basic compound or alkaline material prior to combination of said slurry containing polymer material with said derivatizing agent;
- and
- wherein said derivatizing agent comprises at least one of alkylene oxide, alkali metal haloacetate, haloacetic acid, or a mixture thereof;
- and
- wherein said polymer material comprises at least one of guar, derivatized guar, derivatized cellulose, starch, or a mixture thereof.
6 more elements
A method for forming derivatized polymer material in a slurry, comprising:
- combining an organic solvent based slurry containing polymer material with a basic compound or alkaline material at ambient temperature to activate derivatizing sites on the polymer material;
- then combining said slurry containing polymer material with a derivatizing agent at ambient temperature to cause at least partial mixing to occur between said polymer material and said derivatizing agent;
- and
- allowing said polymer material and said derivatizing agent to react to form derivatized polymer material contained in said slurry;
- wherein said slurry containing polymer material is combined with said basic compound or alkaline material prior to combination of said slurry containing polymer material with said derivatizing agent;
- and
- wherein said organic solvent based slurry containing polymer material further comprises a viscosifier and dispersant.
4 more elements
Dependencies are inferred from the claim text.