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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.:
Associated Universities, Inc., Upton, NY (United States)
OSTI Identifier:
867435
Patent Number(s):
4936384
Assignee:
Associated Universities, Inc. (Washington, DC)
Patent Classifications (CPCs):
C - CHEMISTRY C09 - DYES C09K - MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
C - CHEMISTRY C04 - CEMENTS C04B - LIME, MAGNESIA
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; /166/

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. Mon . "Ca(OH).sub.2 -treated ceramic microsphere". United States. https://www.osti.gov/servlets/purl/867435.
@article{osti_867435,
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 = {1990},
month = {1}
}

Patent:

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