Top drive drilling systems

Patent · Tue Aug 12 00:00:00 EDT 1986

OSTI ID:5375922

Boyadjieff, G I

This patent describes a well apparatus which consists of: a back-up tool for holding the upper end of a string of pipe against rotating as an additional section of pipe is connected thereto; and powered means for moving the tool to engage the upper end of the string: the powered means being operable through a predetermined range of movement, and acting to move the back-up tool vertically during an initial portion of the range of movement and then move the tool between an active position at the axis of the well and a retracted position offset to a side of the axis at the end of the range of movement.

• Assignee: Varco International, Inc., Orange, CA
• Patent Number(s): US 4605077
• OSTI ID: 5375922
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020300* -- Petroleum-- Drilling & Production
03 NATURAL GAS
030300 -- Natural Gas-- Drilling
Production
& Processing
42 ENGINEERING
420206 -- Engineering-- Mining & Drilling Equipment & Facilities-- (1980-1989)
DRILL PIPES
DRILLING
DRILLING EQUIPMENT
DRILLING RIGS
DRILLS
EQUIPMENT
INSTALLATION
JOINTS
MOTION
MOTORS
NATURAL GAS WELLS
OIL WELLS
PIPES
POSITIONING
ROTARY DRILLING
ROTARY DRILLS
ROTATION
THREADED JOINTS
WELL DRILLING
WELLS