Apparatus for making and breaking threaded well pipe connections

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO 4843945
SERIAL NO

07023385

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ATTORNEY / AGENT: (SPONSORED)

Importance

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Abstract

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An apparatus for making and breaking threaded well pipe connections has a stationary support mountable on a rig floor and positioning arms mounted on the stationary support. The positioning arms selectively support and position a movable frame which carries power tongs for clamping pipes. By operation of the positioning arms, the power tongs can be operatively disposed to act on a pipe at the well center, positioned in a stowed position or disposed in a mousehole position to act on a pipe in the mousehole.

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Patent Owner(s)

Patent OwnerAddress
NATIONAL-OILWELL L P10000 RICHMOND AVENUE SUITE 400 HOUSTON TX 77042-4200

International Classification(s)

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Dinsdale, Michael C Dallas, TX 14 3947

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