Surface controlled blade stabilizer

Patent · Sat Jan 01 00:00:00 EST 1983

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
• Resource Relation: Patent File Date: 1982 Apr 16
• Country of Publication: United States
• Language: English

Related Subjects

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