Completion and workover fluid
An aqueous completion or workover fluid for oil or gas wells having at least two solid components. One component is a hydroxy containing aluminum compound represented by the formula AlO(OH).xH/sub 2/O. The second component is a fluid loss control agent which can be either a cross-linked polyvinyl alcohol or a cross-linked hydroxyalkyl cellulose reaction product. An acid soluble weighting agent can be added for wells having higher down hole pressures. Examples of the weighting agents include iron carbonates, iron oxides, calcium carbonates, dolomite, sodium or calcium chloride, zinc bromide and calcium bromide. After use, the fluid can be displaced from the well with acid, e.g. 15% HCl, and the cake previously deposited on the bore-hole wall is dissolved by the acid so that no damaging residue remains.
- Assignee:
- W R Grace and Co.
- Patent Number(s):
- US 4541485
- OSTI ID:
- 5944919
- Resource Relation:
- Patent File Date: Filed date 24 Jun 1983; Other Information: PAT-APPL-507352
- Country of Publication:
- United States
- Language:
- English
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High temperature stable viscosifier and fluid loss control system
Acid-soluble drilling, completion and workover fluids
Related Subjects
03 NATURAL GAS
NATURAL GAS WELLS
PLUGGING
OIL WELLS
PLUGGING AGENTS
CHEMICAL COMPOSITION
ACIDIZATION
ALCOHOLS
ALUMINIUM HYDROXIDES
AQUEOUS SOLUTIONS
CALCIUM BROMIDES
CALCIUM CARBONATES
CALCIUM CHLORIDES
CELLULOSE
CROSS-LINKING
DOLOMITE
HYDROCHLORIC ACID
IRON CARBONATES
IRON OXIDES
POLYVINYLS
ROCK-FLUID INTERACTIONS
SODIUM CHLORIDES
SOLUBILITY
ZINC BROMIDES
ALKALI METAL COMPOUNDS
ALKALINE EARTH METAL COMPOUNDS
ALUMINIUM COMPOUNDS
BROMIDES
BROMINE COMPOUNDS
CALCIUM COMPOUNDS
CALCIUM HALIDES
CARBOHYDRATES
CARBON COMPOUNDS
CARBONATE MINERALS
CARBONATES
CHALCOGENIDES
CHEMICAL REACTIONS
CHLORIDES
CHLORINE COMPOUNDS
DISPERSIONS
HALIDES
HALOGEN COMPOUNDS
HYDROGEN COMPOUNDS
HYDROXIDES
HYDROXY COMPOUNDS
INORGANIC ACIDS
IRON COMPOUNDS
MAGNESIUM CARBONATES
MAGNESIUM COMPOUNDS
MINERALS
MIXTURES
ORGANIC COMPOUNDS
ORGANIC POLYMERS
OXIDES
OXYGEN COMPOUNDS
POLYMERIZATION
POLYMERS
POLYSACCHARIDES
SACCHARIDES
SODIUM COMPOUNDS
SOLUTIONS
TRANSITION ELEMENT COMPOUNDS
WELLS
ZINC COMPOUNDS
ZINC HALIDES
020300* - Petroleum- Drilling & Production
030300 - Natural Gas- Drilling
Production
& Processing