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Title: Method of deep drilling

Abstract

Deep drilling is facilitated by the following steps practiced separately or in any combination: (1) Periodically and sequentially fracturing zones adjacent the bottom of the bore hole with a thixotropic fastsetting fluid that is accepted into the fracture to overstress the zone, such fracturing and injection being periodic as a function of the progression of the drill. (2) Casing the bore hole with ductile, pre-annealed casing sections, each of which is run down through the previously set casing and swaged in situ to a diameter large enough to allow the next section to run down through it. (3) Drilling the bore hole using a drill string of a low density alloy and a high density drilling mud so that the drill string is partially floated.

Inventors:
 [1]
  1. 4616 Ridgeway, Los Alamos, NM 87544
Issue Date:
Research Org.:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
OSTI Identifier:
865257
Patent Number(s):
4483399
Assignee:
Colgate, Stirling A. (4616 Ridgeway, Los Alamos, NM 87544)
DOE Contract Number:  
W-7405-ENG-48
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
method; deep; drilling; facilitated; following; steps; practiced; separately; combination; periodically; sequentially; fracturing; zones; adjacent; bottom; bore; thixotropic; fastsetting; fluid; accepted; fracture; overstress; zone; injection; periodic; function; progression; drill; casing; ductile; pre-annealed; sections; run; previously; set; swaged; situ; diameter; allow; section; string; density; alloy; mud; partially; floated; drilling mud; drill string; following steps; deep drilling; /166/175/

Citation Formats

Colgate, Stirling A. Method of deep drilling. United States: N. p., 1984. Web.
Colgate, Stirling A. Method of deep drilling. United States.
Colgate, Stirling A. Sun . "Method of deep drilling". United States. https://www.osti.gov/servlets/purl/865257.
@article{osti_865257,
title = {Method of deep drilling},
author = {Colgate, Stirling A},
abstractNote = {Deep drilling is facilitated by the following steps practiced separately or in any combination: (1) Periodically and sequentially fracturing zones adjacent the bottom of the bore hole with a thixotropic fastsetting fluid that is accepted into the fracture to overstress the zone, such fracturing and injection being periodic as a function of the progression of the drill. (2) Casing the bore hole with ductile, pre-annealed casing sections, each of which is run down through the previously set casing and swaged in situ to a diameter large enough to allow the next section to run down through it. (3) Drilling the bore hole using a drill string of a low density alloy and a high density drilling mud so that the drill string is partially floated.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1984},
month = {1}
}

Patent:

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