Spherical ball skate for continuous well string injectors
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United States of America Patent
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Nov 8, 2016
Grant Date -
Mar 10, 2016
app pub date -
May 2, 2014
filing date -
May 3, 2013
priority date (Note) -
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Abstract
A skate for an injector apparatus in which gripper dies on a pair of endless chains driven around respective closed loop paths on different sides a continuous wellbore string are forced against the continuous string by forcing a set of the skates toward theretoward from inside the closed loop paths of the endless chains. The inventive skate features a skate body carrying a plurality of spherical balls that are exposed on a side of the skate that faces toward the continuous string in order to allow riding of endless chains over exposed surfaces of the spherical balls as the endless chains are driven through the respective closed-loop paths, whereby the gripper dies ride over the spherical balls of said skates under the forcing of said skates toward the continuous string.
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