Method and apparatus for rotary power driven swivel drilling

Patent · Tue Jan 02 04:00:00 EST 1990

OSTI ID:7017448

Skelly, M

This patent describes a power driven system imparting rotary motion to a drill string through a first drill pike for use in a drilling rig of the kind presenting a suspended hook. The power drive system comprising: a rotary drive swivel unit having a center of gravity, the rotary drive unit comprising: drive means for imparting rotary motion and an output shaft in rotational connection with the drive means; means for connecting the output shaft to the drill string at the first drill pipe for imparting rotational motion thereto; means for controlling the drive means; means connected to the rotary drive swivel unit for resisting torque upon the rotary drive swivel unit when the drill string is rotated; means for connecting the rotary swivel drive unit to the hook of the drilling rig. The means having a horizontal pivot axis the center of gravity of the rotary drive swivel unit being below the horizontal pivot axis and within the circumference of the connecting means; means for disconnecting the output shaft from the drill string at the first drill pipe; means for easily tilting the rotary drive swivel means about the horizontal pivotal axis to present the disconnected output shaft in a substantially horizontal orientation whereby the rotary drive swivel is tiltable with a minimum of force; and means for connecting the output shaft to a second drill pipe which is horizontally presented.

• Assignee: NOV; EDB-90-075413; NOV-90-006200
• Patent Number(s): US 4890681; A
• Application Number: PPN: US 7333782A
• OSTI ID: 7017448
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020300* -- Petroleum-- Drilling & Production
03 NATURAL GAS
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Production
& Processing
CONTROL SYSTEMS
DESIGN
DRILLING
DRILLING EQUIPMENT
DRILLS
EQUIPMENT
FABRICATION
JOINING
NATURAL GAS WELLS
OIL WELLS
ROTARY DRILLING
ROTARY DRILLS
WELLS