Ca(OH)[sub 2]-treated ceramic microsphere
Patent
·
OSTI ID:7270122
Geothermal wells with lost circulation problems are treated with a lightweight, high temperature (i.e. 350 C) cement slurry which incorporates pressure resistant hollow microspheres into the slurry wherein the spheres have been pretreated with an alkali compound such as Ca(OH)[sub 2] for up to 20 hours and at 100--300 C. Preferably, the alkali solution is a saturated aqueous solution and the treatment is for 10 hours. 2 figs.
- DOE Contract Number:
- AC02-76CH00016
- Assignee:
- Associated Universities, Inc., Washington, DC (United States)
- Patent Number(s):
- A; US 4822422
- Application Number:
- PPN: US 7-106269
- OSTI ID:
- 7270122
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
15 GEOTHERMAL ENERGY
150901* -- Geothermal Engineering-- Drilling Technology & Well Hardware
36 MATERIALS SCIENCE
360601 -- Other Materials-- Preparation & Manufacture
ALKALINE HYDROLYSIS
BUILDING MATERIALS
CEMENTS
CHEMICAL REACTIONS
DECOMPOSITION
FABRICATION
GEOTHERMAL WELLS
HYDROLYSIS
LOST CIRCULATION
LYSIS
MATERIALS
MICROSPHERES
REPAIR
SOLVOLYSIS
WELLS
150901* -- Geothermal Engineering-- Drilling Technology & Well Hardware
36 MATERIALS SCIENCE
360601 -- Other Materials-- Preparation & Manufacture
ALKALINE HYDROLYSIS
BUILDING MATERIALS
CEMENTS
CHEMICAL REACTIONS
DECOMPOSITION
FABRICATION
GEOTHERMAL WELLS
HYDROLYSIS
LOST CIRCULATION
LYSIS
MATERIALS
MICROSPHERES
REPAIR
SOLVOLYSIS
WELLS