Matrix control cementing slurry
This patent describes a method of cementing a well bore. The method consists of 1.) mixing together at ambient temperatures at the well surface a hydraulic cement, water, in an effective amount to produce a pumpable slurry, and a polyvinyl acetate-polyvinyl alcohol polymer, which is insoluble in the slurry at ambient temperatures. The polymer has a greater than about 95 percent acetate groups converted to hydroxyl groups. The polymer is heated to actuable solubilization in the cement slurry at temperatures above about 120/sup 0/F. The solubilizing of the polyvinyl acetate-polyvinyl alcohol polymer in the slurry prior to the setting of the slurry by pumping the cement slurry to a desired location in the well bore. This action increases the temperature of the slurry; and 2.) allows the cement slurry to harden to a solid mass.
- Assignee:
- Hughes Tool Co., Houston, TX
- Patent Number(s):
- US 4569395
- OSTI ID:
- 5865968
- Resource Relation:
- Patent File Date: Filed date 20 Apr 1984
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
03 NATURAL GAS
CEMENTS
CHEMICAL PREPARATION
MIXING
NATURAL GAS WELLS
CEMENTING
OIL WELLS
ACETIC ACID ESTERS
AMBIENT TEMPERATURE
HARDENING
MEDIUM TEMPERATURE
PVA
QUANTITY RATIO
SLURRIES
VINYL MONOMERS
WATER
ALCOHOLS
BUILDING MATERIALS
CARBOXYLIC ACID ESTERS
DISPERSIONS
ESTERS
HYDROGEN COMPOUNDS
HYDROXY COMPOUNDS
MATERIALS
MIXTURES
MONOMERS
ORGANIC COMPOUNDS
ORGANIC POLYMERS
OXYGEN COMPOUNDS
POLYMERS
POLYVINYLS
SUSPENSIONS
SYNTHESIS
WELLS
020300* - Petroleum- Drilling & Production
030300 - Natural Gas- Drilling
Production
& Processing