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Title: Overview - Hard Rock Penetration

Abstract

The Hard Rock Penetration program is developing technology to reduce the costs of drilling and completing geothermal wells. Current projects include: lost circulation control, rock penetration mechanics, instrumentation, and industry/DOE cost shared projects of the Geothermal Drilling Organization. Last year, a number of accomplishments were achieved in each of these areas. A new flow meter being developed to accurately measure drilling fluid outflow was tested extensively during Long Valley drilling. Results show that this meter is rugged, reliable, and can provide useful measurements of small differences in fluid inflow and outflow rates. By providing early indications of fluid gain or loss, improved control of blow-out and lost circulation problems during geothermal drilling can be expected. In the area of downhole tools for lost circulation control, the concept of a downhole injector for injecting a two-component, fast-setting cementitious mud was developed. DOE filed a patent application for this concept during FY 91. The design criteria for a high-temperature potassium, uranium, thorium logging tool featuring a downhole data storage computer were established, and a request for proposals was submitted to tool development companies. The fundamental theory of acoustic telemetry in drill strings was significantly advanced through field experimentation and analysis. A newmore » understanding of energy loss mechanisms was developed.« less

Authors:
Publication Date:
Research Org.:
Sandia National Laboratories (SNL-NM), Albuquerque, NM
Sponsoring Org.:
USDOE
OSTI Identifier:
891888
Report Number(s):
CONF-920378-12
TRN: US200622%%536
Resource Type:
Conference
Resource Relation:
Conference: Proceedings, Geothermal Energy and the Utility Market - The Opportunities and Challenges for Expanding Geothermal Energy in a Competitive Supply Market; San Francisco, CA, March 24-26, 1992, Geothermal Program Review X
Country of Publication:
United States
Language:
English
Subject:
15 GEOTHERMAL ENERGY; ACOUSTICS; AVAILABILITY; COMPUTERS; DESIGN; DRILLING; DRILLING FLUIDS; GEOTHERMAL ENERGY; GEOTHERMAL WELLS; LONG VALLEY; LOSSES; MARKET; POTASSIUM; STORAGE; TELEMETRY; THORIUM; URANIUM; Geothermal Legacy

Citation Formats

Dunn, James C. Overview - Hard Rock Penetration. United States: N. p., 1992. Web.
Dunn, James C. Overview - Hard Rock Penetration. United States.
Dunn, James C. Tue . "Overview - Hard Rock Penetration". United States. doi:. https://www.osti.gov/servlets/purl/891888.
@article{osti_891888,
title = {Overview - Hard Rock Penetration},
author = {Dunn, James C.},
abstractNote = {The Hard Rock Penetration program is developing technology to reduce the costs of drilling and completing geothermal wells. Current projects include: lost circulation control, rock penetration mechanics, instrumentation, and industry/DOE cost shared projects of the Geothermal Drilling Organization. Last year, a number of accomplishments were achieved in each of these areas. A new flow meter being developed to accurately measure drilling fluid outflow was tested extensively during Long Valley drilling. Results show that this meter is rugged, reliable, and can provide useful measurements of small differences in fluid inflow and outflow rates. By providing early indications of fluid gain or loss, improved control of blow-out and lost circulation problems during geothermal drilling can be expected. In the area of downhole tools for lost circulation control, the concept of a downhole injector for injecting a two-component, fast-setting cementitious mud was developed. DOE filed a patent application for this concept during FY 91. The design criteria for a high-temperature potassium, uranium, thorium logging tool featuring a downhole data storage computer were established, and a request for proposals was submitted to tool development companies. The fundamental theory of acoustic telemetry in drill strings was significantly advanced through field experimentation and analysis. A new understanding of energy loss mechanisms was developed.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue Mar 24 00:00:00 EST 1992},
month = {Tue Mar 24 00:00:00 EST 1992}
}

Conference:
Other availability
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