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Handbook of Best Practices for Geothermal Drilling

Blankenship, Douglas A.

This Handbook is a description of the complex process that comprises drilling a geothermal well. The focus of the detailed Chapters covering various aspects of the process (casing design, cementing, logging and instrumentation, etc) is on techniques and hardware that have proven successful in geothermal reservoirs around the world. The Handbook will eventually be linked to the GIA web site, with the hope and expectation that it can be continually updated as new methods are demonstrated or proven.

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TYPE SAND Report YEAR 2012
DOIDOIOSTIOSTI

Development of a High-Temperature Diagnostics-While-Drilling Tool

Blankenship, Douglas A.; Chavira, David C.; Henfling, Joseph A.; King, Dennis K.; Knudsen, Steven D.; Polsky, Yarom P.

This report documents work performed in the second phase of the Diagnostics While-Drilling (DWD) project in which a high-temperature (HT) version of the phase 1 low-temperature (LT) proof-of-concept (POC) DWD tool was built and tested. Descriptions of the design, fabrication and field testing of the HT tool are provided.

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TYPE SAND Report YEAR 2009
DOIOSTI

Hard-rock field performance of drag bits and a downhole Diagnostics-While-Drilling (DWD) tool

Transactions - Geothermal Resources Council

Wise, Jack L.; Mansure, Arthur J.; Blankenship, Douglas A.

A series of field tests sponsored by Sandia National Laboratories has simultaneously demonstrated the hard-rock drilling performance of different industry-supplied drag bits as well as Sandia's new Diagnostics-While-Drilling (DWD) system, which features a novel downhole tool that monitors dynamic conditions in close proximity to the bit. Drilling with both conventional and advanced ("best effort") drag bits was conducted at the GTI Catoosa Test Facility (near Tulsa, OK) in a well-characterized lithologic column that features an extended hard-rock interval of Mississippi limestone above a layer of highly abrasive Misener sandstone and an underlying section of hard Arbuckle dolomite. Output from the DWD system was closely observed during drilling and was used to make real-time decisions for adjusting the drilling parameters. This paper summarizes penetration rate and damage results for the various drag bits, shows representative DWD display data, and illustrates the application of these data for optimizing drilling performance and avoiding trouble.

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TYPE Conference YEAR 2005
ScopusOSTI
Results 51–70 of 70
Results 51–70 of 70