Surface controlled blade stabilizer

Patent · 31 December 1982

OSTI ID:864717

Russell, Larry R.

Drill string stabilizer apparatus, controllable to expand and retract entirely from the surface by control of drill string pressure, wherein increase of drill string pressure from the surface closes a valve to create a piston means which is moved down by drill string pressure to expand the stabilizer blades, said valve being opened and the piston moving upward upon reduction of drill string pressure to retract the stabilizer blades. Upward and downward movements of the piston and an actuator sleeve therebelow are controlled by a barrel cam acting between the housing and the actuator sleeve.

• Research Organization: US Dept. of Energy (USDOE), Washington, DC (United States)
• Sponsoring Organization: USDOE
• DOE Contract Number: AC19-80BC10175
• Assignee: Russell; Larry R., Houston, TX (United States)
• Patent Number(s): 4,407,377
• Application Number: 06/368,996
• OSTI ID: 864717
• Country of Publication: United States
• Language: English

Related Subjects

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acting
actuator
apparatus
barrel
blade
blades
closes
control
controllable
controlled
create
downward
downward movement
drill
drill string
entirely
expand
housing
increase
means
moved
movements
moving
piston
pressure
reduction
retract
sleeve
stabilizer
string
string pressure
surface
surface control
therebelow
upward
valve