Apparatus for screwing pipes together
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United States of America Patent
Stats
-
Jan 8, 1985
Grant Date -
N/A
app pub date -
Sep 24, 1982
filing date -
Sep 30, 1981
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A power tongs for threadedly connecting together pipes which are to constitute casings for boreholes has a platform for a reciprocable slide which supports a power-driven threading clamp and a counter device. The clamp and the counter device are connected to each other by several level compensating hydraulic cylinders each of which is movable horizontally within limits relative to the slide against the opposition of resilient support elements. The upper end portions of the cylinders are connected to a holding plate for the clamp.
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Family
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Cited Art Landscape
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