Independently powered breakout apparatus and method for a sectional drill string

Patent · Tue Apr 03 04:00:00 EST 1979

OSTI ID:6182850

Hodge, L R; Crowell, J M; Rogers, R A

An improved means for making up and breaking out sections of drill pipe is disclosed herein. The make-up and breakout system is adapted for drill rigs having powered rotaries and powered carriages for moving the rotary up and down the mast. A wrench is mounted to the carriage for gripping the first section of the pipe. Slips are mounted at the work table for gripping the second section of pipe to support the string of pipe and prevent its rotation. The wrench is powered independently of the rotary, and the wrench and rotary can also rotate a certain amount with respect to each other while the wrench is gripping the first section of pipe. The independent power of rotation allows the wrench to breakout the first section from the second section. It also allows the rotary to breakout the first section from the rotary while the wrench restrains the first section from rotation.

• Assignee: Hughes Tool Co.
• Patent Number(s): US 4147215
• OSTI ID: 6182850
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
420206* -- Engineering-- Mining & Drilling Equipment & Facilities-- (1980-1989)
DESIGN
DRILLING EQUIPMENT
EQUIPMENT
PIPES
REMOVAL