Methods and compositions for forming permeable cement sand screens in well bores
AssigneeHalliburton Energy Services, Inc.
InventorsJiten Chatterji, Roger S. Cromwell, Baireddy R. Reddy, Bobby J. King, Philip D. Nguyen, David L. Brown
Life of this patent
Estimating the term…
Abstract
Methods and compositions for forming permeable cement sand screens in well bores are provided. The compositions are basically comprised of a hydraulic cement, an acid soluble particulate solid, a liquid hydrocarbon solvent soluble particulate solid, a particulate cross-linked gel containing an internal breaker which after time causes the gel to break into a liquid, water present in an amount sufficient to form a slurry, a gas present in an amount sufficient to form a foam and a mixture of foaming and foamed stabilizing surfactants.
Claims30
A composition for forming a permeable cement sand screen in a well bore comprising:
- a hydraulic cement;
- an acid soluble particulate solid;
- a liquid hydrocarbon solvent soluble particulate solid;
- a particulate cross-linked gel containing an internal breaker which after time causes said gel to break into a liquid;
- water present in an amount sufficient to form a slurry;
- a gas present in an amount sufficient to form a foam;
- and
- a mixture of foaming and foam stabilizing surfactants.
A composition for forming a permeable cement sand screen in a well bore comprising:
- a hydraulic cement;
- an acid soluble particulate solid selected from the group consisting of calcium carbonate, magnesium carbonate and zinc carbonate;
- a liquid hydrocarbon solvent soluble particulate solid selected from the group consisting of gilsonite, naphthalene, polystyrene beads and asphaltene;
- a particulate cross-linked gel containing an internal breaker comprised of water, a hydratable polymer of hydroxyalkylcellulose grafted with vinyl phosphonic acid, a breaker selected from the group consisting of hemicellulase, encapsulated ammonium persulfate, ammonium persulfate activated with ethanol amines and sodium chlorite and a cross-linking agent comprised of a Bronsted-Lowry or Lewis base;
- water present in an amount sufficient to form a slurry;
- a gas present in an amount sufficient to form a foam;
- and
- a mixture of foaming and foam stabilizing surfactants.
A composition for forming a permeable cement sand screen in a well bore comprising:
- a hydraulic cement;
- an acid soluble particulate solid present in an amount in the range of from about 2.5% to about 25% by weight of cement in said composition;
- a liquid hydrocarbon solvent soluble particulate solid present in an amount in the range of from about 2.5% to about 25% by weight of cement in said composition;
- a particulate cross-linked gel containing an internal breaker present in the range of from about 10% to about 30% by weight of cement in said composition;
- water present in an amount sufficient to form a slurry;
- a gas present in an amount sufficient to form a foam;
- and
- a mixture of foaming and foam stabilizing surfactants present in the range of from about 1% to about 5% by weight of water in said composition.
Dependencies are inferred from the claim text.