Surface control bent sub for directional drilling of petroleum wells

Patent · Wed Jan 01 00:00:00 EST 1986

OSTI ID:865887

Russell, Larry R ^[1]

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1. 6025 Edgemoor, Suite C, Houston, TX 77081

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.

• Research Organization: LARRY RUSSELL & ASSOC
• DOE Contract Number: AC19-80BC10175
• Assignee: Russell; Larry R. (6025 Edgemoor, Suite C, Houston, TX 77081)
• Patent Number(s): US 4596294
• OSTI ID: 865887
• Country of Publication: United States
• Language: English

Related Subjects

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
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