skip to main content
DOE Patents title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Surface control bent sub for directional drilling of petroleum wells

Abstract

Directional drilling apparatus for incorporation in a drill string, wherein a lower apparatus section is angularly deviated from vertical by cam action and wherein rotational displacement of the angularly deviated apparatus section is overcome by additional cam action, the apparatus being operated by successive increases and decreases of internal drill string pressure.

Inventors:
 [1]
  1. 6025 Edgemoor, Suite C, Houston, TX 77081
Issue Date:
Research Org.:
LARRY RUSSELL & ASSOC
OSTI Identifier:
865887
Patent Number(s):
4596294
Assignee:
Russell; Larry R. (6025 Edgemoor, Suite C, Houston, TX 77081)
DOE Contract Number:  
AC19-80BC10175
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
surface; control; bent; directional; drilling; petroleum; apparatus; incorporation; drill; string; section; angularly; deviated; vertical; action; rotational; displacement; overcome; additional; operated; successive; increases; decreases; internal; pressure; string pressure; drill string; rotational displacement; drilling apparatus; directional drilling; surface control; /175/

Citation Formats

Russell, Larry R. Surface control bent sub for directional drilling of petroleum wells. United States: N. p., 1986. Web.
Russell, Larry R. Surface control bent sub for directional drilling of petroleum wells. United States.
Russell, Larry R. Wed . "Surface control bent sub for directional drilling of petroleum wells". United States. https://www.osti.gov/servlets/purl/865887.
@article{osti_865887,
title = {Surface control bent sub for directional drilling of petroleum wells},
author = {Russell, Larry R},
abstractNote = {Directional drilling apparatus for incorporation in a drill string, wherein a lower apparatus section is angularly deviated from vertical by cam action and wherein rotational displacement of the angularly deviated apparatus section is overcome by additional cam action, the apparatus being operated by successive increases and decreases of internal drill string pressure.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1986},
month = {1}
}

Patent:

Save / Share: