Tong assembly
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Mar 10, 1987
Issued Date -
N/A
app pub date -
Jan 13, 1986
filing date -
Mar 19, 1984
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A tong assembly for makeup and break out of tool joints including a power tong and a backup tong which is rotatable through a limited rotation with respect to the power tong. During a torquing operation a single, self energizing free jaw and die grips the lower tubing of the tool joint in cooperation with two surfaces of a hardsurfaced bushing. The tool joint is gripped eccentric to the longitudinal centerline of the backup tong, and aligned with the longitudinal centerline of the power tong.
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