Hydraulic backup tong
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United States of America Patent
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Jul 14, 1998
Issued Date -
N/A
app pub date -
Jul 3, 1997
filing date -
Nov 7, 1995
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
The powered backup tong assembly 10 includes a planar support plate 14, a pair of hydraulically powered cylinders 16, 18, a pair of link arms 20, 22, and heads 24, 26, and 30 for gripping engagement with the oilfield tubular. The powered backup tong frame includes an open throat 28 for laterally moving the power tong on and off the tubular member. A pair of rear ears 32, 34 each extending laterally outward from a centerline 12 of the plate 14 facilitate mounting the pair of hydraulically powered cylinders 16, 18 laterally outward of the support plate 14. The opposing heads 24, 26 are each pivotally connected to a respective pivot arm 20, 22, and the head 30 is mounted directly to support plate 14. The power tong is relatively simple and lightweight, and is highly reliable.
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Cited Art Landscape
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