Wells – Pistons – fluid driven into well – With stop
Patent
1991-05-15
1992-05-19
Dang, Hoang C.
Wells
Pistons, fluid driven into well
With stop
166153, 166155, 166192, 166242, E21B 3316
Patent
active
051139405
ABSTRACT:
Well apparatuses with device for preventing their relative rotation with respect to adjacent well apparatuses and anti-rotation devices for well apparatuses, including, but not limited to, plugs, float shoes, float collars, jars, and clutch devices for packers. In one embodiment a non-rotation device has a main member with a recess on which are disposed a plurality of teeth with a load member adjacent the teeth for bearing a load put on the device and for isolating the teeth from the load, the teeth extending beyond the recess. In one embodiment the teeth are configured, disposed, and profiled to facilitate their interengagement with other teeth and to contain between them foreign objects which might impede proper interengagement. In various embodiments plugs are provided with such anti-rotation devices. In various embodiments the load member is a continuous circular ring disposed about the apparatuses outer periphery or around the opening of a channel through the device. The load members may be non-continuous upstanding members.
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Dang Hoang C.
McClung Guy
Weatherford U.S. Inc.
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