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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.degree. 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.degree.-300.degree. C. Preferably, the alkali solution is a saturated aqueous solution and the treatment is for 10 hours.

Inventors:
 [1]
  1. (Mastic Beach, NY)
Issue Date:
Research Org.:
ASSOC UNIVERSITIES INC
OSTI Identifier:
866923
Patent Number(s):
4822422
Assignee:
Associated Universities, Inc. (Washington, DC) BNL
DOE Contract Number:  
AC02-76CH00016
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
oh; -treated; ceramic; microsphere; geothermal; lost; circulation; treated; lightweight; temperature; 350; degree; cement; slurry; incorporates; pressure; resistant; hollow; microspheres; spheres; pretreated; alkali; compound; 20; hours; 100; -300; preferably; solution; saturated; aqueous; treatment; 10; lost circulation; hollow microspheres; aqueous solution; alkali solution; pressure resistant; resistant hollow; ceramic microsphere; -treated ceramic; incorporates pressure; treated ceramic; cement slurry; /106/

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. Sun . "Ca(OH).sub.2 -treated ceramic microsphere". United States. https://www.osti.gov/servlets/purl/866923.
@article{osti_866923,
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.degree. 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.degree.-300.degree. C. Preferably, the alkali solution is a saturated aqueous solution and the treatment is for 10 hours.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1989},
month = {1}
}

Patent:

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