Ca(OH)[sub 2]-treated ceramic microsphere
Abstract
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.
- Inventors:
- Issue Date:
- OSTI Identifier:
- 7270127
- Patent Number(s):
- 4936384
- Application Number:
- PPN: US 7-283619
- Assignee:
- Associated Universities, Inc., Washington, DC (United States)
- DOE Contract Number:
- AC02-76CH00016
- Resource Type:
- Patent
- Resource Relation:
- Patent File Date: 13 Dec 1988
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 15 GEOTHERMAL ENERGY; GEOTHERMAL WELLS; LOST CIRCULATION; REPAIR; PLUGGING AGENTS; CHEMICAL COMPOSITION; ADDITIVES; CALCIUM HYDROXIDES; CEMENTS; MICROSPHERES; ALKALINE EARTH METAL COMPOUNDS; BUILDING MATERIALS; CALCIUM COMPOUNDS; HYDROGEN COMPOUNDS; HYDROXIDES; MATERIALS; OXYGEN COMPOUNDS; WELLS; 150901* - Geothermal Engineering- Drilling Technology & Well Hardware
Citation Formats
Sugama, Toshifumi. Ca(OH)[sub 2]-treated ceramic microsphere. United States: N. p., 1990.
Web.
Sugama, Toshifumi. Ca(OH)[sub 2]-treated ceramic microsphere. United States.
Sugama, Toshifumi. Tue .
"Ca(OH)[sub 2]-treated ceramic microsphere". United States.
@article{osti_7270127,
title = {Ca(OH)[sub 2]-treated ceramic microsphere},
author = {Sugama, Toshifumi},
abstractNote = {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.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1990},
month = {6}
}
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