Apparatus for screwing pipes together
AssigneeWeatherford Oil Tool GmbH
InventorsBernd Reinholdt, Hans-Christian Bock
Life of this patent
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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.
Claims7
Apparatus for screwing together pipes provided for the casing of boreholes, comprising a support;
- a slide movably mounted on said support;
- a power-driven screwing clamp on said slide;
- a counter device on said slide;
- and level compensating means connecting said clamp to said counter device, including a plurality of hydraulic operating cylinders.
Dependencies are inferred from the claim text.