New approach to high temperature drilling fields
The clay mineral sepiolite has been under investigation since 1972 by our laboratories for possible use in drilling fluids. This paper reviews the work done on this clay mineral in an effort to obtain a drilling fluid capable of withstanding temperatures in the ultra high range. This includes a study on the rheology of sepiolite slurries that have been subjected to temperatures up to 800/sup 0/F. X-ray diffraction techniques and scanning electron microscope studies were used to examine the crystalline structure of the sepiolite before and after exposure to these high temperatures. There appears to be some changes in the sepiolite after being subjected to temperatures up to 800/sup 0/F. However, the basic structure seems to be stable. Data is given showing that slurries prepared from sepiolite and other additives have favorable rheological and fluid loss properties over wide temperature ranges.
- OSTI ID:
- 7309564
- Report Number(s):
- CONF-761008-125
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
020300* -- Petroleum-- Drilling & Production
42 ENGINEERING
420206 -- Engineering-- Mining & Drilling Equipment & Facilities-- (1980-1989)
ALKALINE EARTH METAL COMPOUNDS
CHEMICAL COMPOSITION
DISPERSIONS
DRILLING FLUIDS
MAGNESIUM COMPOUNDS
MAGNESIUM SILICATES
MIXTURES
OXYGEN COMPOUNDS
RHEOLOGY
SILICATES
SILICON COMPOUNDS
SLURRIES
SUSPENSIONS
TEMPERATURE EFFECTS