Ca(OH)[sub 2]-treated ceramic microsphere

Patent · Tue Apr 18 00:00:00 EDT 1989

OSTI ID:7270122

Sugama, Toshifumi

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): US 4822422; A
• Application Number: PPN: US 7-106269
• OSTI ID: 7270122
• Resource Relation: Patent File Date: 9 Oct 1987
• Country of Publication: United States
• Language: English

Related Subjects

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