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Title: 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:
7270122
Patent Number(s):
4822422
Application Number:
PPN: US 7-106269
Assignee:
Associated Universities, Inc., Washington, DC (United States)
DOE Contract Number:  
AC02-76CH00016
Resource Type:
Patent
Resource Relation:
Patent File Date: 9 Oct 1987
Country of Publication:
United States
Language:
English
Subject:
15 GEOTHERMAL ENERGY; 36 MATERIALS SCIENCE; CEMENTS; FABRICATION; GEOTHERMAL WELLS; LOST CIRCULATION; REPAIR; MICROSPHERES; ALKALINE HYDROLYSIS; BUILDING MATERIALS; CHEMICAL REACTIONS; DECOMPOSITION; HYDROLYSIS; LYSIS; MATERIALS; SOLVOLYSIS; WELLS; 150901* - Geothermal Engineering- Drilling Technology & Well Hardware; 360601 - Other Materials- Preparation & Manufacture

Citation Formats

Sugama, Toshifumi. Ca(OH)[sub 2]-treated ceramic microsphere. United States: N. p., 1989. 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_7270122,
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 = {1989},
month = {4}
}