Well cementing method using a dispersant and fluid loss intensifier
This patent describes a method of cementing a well bore. It comprises 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 the cement slurry to the desired location in the well bore; and allowing the cement slurry to harden to a solid mass; wherein the ethoxylated surfactant is selected from the group consisting of 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.
- Assignee:
- BJ Services Co., Houston, TX (United States)
- Patent Number(s):
- US 5105885; A
- Application Number:
- PPN: US 7-616232
- OSTI ID:
- 5153043
- Country of Publication:
- United States
- Language:
- English
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