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US 5,105,885 AGranted
Well cementing method using a dispersant and fluid loss intensifier
AssigneeBJ Services Company
InventorsWindal S. Bray, William R. Wood
Life of this patent
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Abstract
A fluid loss and dispersant intensifier and method are shown for use in cementing oil and gas well bores. The intensifier includes an ethoxylate and a sulfonated dispersant type material. The intensifier package provides effective fluid loss control without adversely affecting the viscosity of the cement slurry.
Claims18
A method of cementing a well bore, comprising the steps of:
- mixing together a hydraulic cement, water in an amount to produce a pumpable slurry, and an intensifier package comprising a blend of an ethoxylated surfactant and a sulfonated dispersant material, the intensifier package being present in the range from about 0.1 to 3.0%, based on the weight of hydraulic cement;
- pumping said cement slurry to the desired location in said well bore;
- and
- allowing said cement slurry to harden to a solid mass;
- wherein the ethoxylated surfactant is selected from the group consisting of ethoxylated alkylphenols, ethoxylated fatty alcohols, ethoxylated amines, ethoxylated amides, ethoxylated fatty acids, ethoxylated diamines and ethoxylated quarternary ammonium chlorides;
- and
- wherein the low molecular weight sulfonated dispersant material is an anionic surface active agent of the sulfonated type, comprising a salt of naphthalene sulfonic acid condensed with formaldehyde, having a molecular weight between about 1000 and 10,000.
4 more elements
A method of cementing a well bore, comprising the steps of:
- mixing together a hydraulic cement, water in an amount to produce a pumpable slurry, and an intensifier package comprising a blend of an ethoxylated surfactant and a sulfonated dispersant material, the intensifier package being present in the range from about 0.1 to 3.0%, based on the weight of hydraulic cement;
- pumping said cement slurry to the desired location in said well bore;
- allowing said cement slurry to harden to a solid mass;
- wherein the ethoxylated surfactant is selected from the group consisting of ethoxylated alkylphenols, ethoxylated fatty alcohols, ethoxylated amines, ethoxylated amides, ethoxylated fatty acids, ethoxylated diamines and ethoxylated quarternary ammonium chlorides;
- and
- wherein the low molecular weight sulfonated dispersant material is the sodium salt of naphthalene sulfonic acid condensed with formaldehyde, having a molecular weight between about 1000 and 10,000.
3 more elements
Dependencies are inferred from the claim text.