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Title: Advanced drilling systems study.

This report documents the results of a study of advanced drilling concepts conducted jointly for the Natural Gas Technology Branch and the Geothermal Division of the U.S. Department of Energy. A number of alternative rock cutting concepts and drilling systems are examined. The systems cover the range from current technology, through ongoing efforts in drilling research, to highly speculative concepts. Cutting mechanisms that induce stress mechanically, hydraulically, and thermally are included. All functions necessary to drill and case a well are considered. Capital and operating costs are estimated and performance requirements, based on comparisons of the costs for alternative systems to conventional drilling technology, are developed. A number of problems common to several alternatives and to current technology are identified and discussed.
Authors:
; ;  [1]
  1. (Livesay Consultants, Encintas, CA)
Publication Date:
OSTI Identifier:
892770
Report Number(s):
SAND95-0331
TRN: US200623%%570
DOE Contract Number:
AC04-94AL85000
Resource Type:
Technical Report
Research Org:
Sandia National Laboratories
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
English
Subject:
03 NATURAL GAS; CAPITAL; DRILLING; NATURAL GAS; OPERATING COST; PERFORMANCE Geothermal engineering.; Drilling.