Drilling of wells with top drive unit

Patent · Tue May 22 00:00:00 EDT 1984

OSTI ID:6354754

Boyadjieff, G I

Well drilling apparatus including a top drive drilling assembly having a motor driven stem adapted to be attached to the upper end of a drill string and drive it during a drilling operation, a torque wrench carried by the top drive assembly and movable upwardly and downwardly therewith and operable to break a threated connection between the drill string and the stem, and an elevator carried by and suspended from the top drive assembly and adapted to engage a section of drill pipe beneath the torque wrench in suspending relation. The torque wrench and elevator are preferably retained against rotation with the rotary element which drives the drill string, but may be movable vertically relative to that rotary element and relative to one another in a manner actuating the apparatus between various different operating conditions.

• Assignee: Varco International, Inc.
• Patent Number(s): US 4449596
• OSTI ID: 6354754
• Resource Relation: Patent File Date: Filed date 3 Aug 1982; Other Information: PAT-APPL-404896
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
WELL DRILLING
DRILL BITS
DRILL PIPES
ROTARY DRILLS
DESIGN
DRILLING RIGS
GRABS
HOISTS
MOTORS
THREADED JOINTS
DRILLING
DRILLING EQUIPMENT
DRILLS
EQUIPMENT
JOINTS
MATERIALS HANDLING EQUIPMENT
PIPES
420206* - Engineering- Mining & Drilling Equipment & Facilities- (1980-1989)