Method and apparatus for friction reduction in a downhole tool
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United States of America Patent
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Oct 14, 2008
Grant Date -
Dec 14, 2006
app pub date -
Jun 14, 2005
filing date -
Jun 14, 2005
priority date (Note) -
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status (Latency Note)
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Abstract
A system for facilitating the insertion of a tool into a wellbore, especially a non-vertical wellbore. In one embodiment a tool is fixable in a wellbore and includes centralizing, friction-reducing members that serve to keep the body of the tool off the walls of the wellbore. In another embodiment the tool includes a wiper ring that partially fills an annular area formed between the centered tool and the wellbore walls. The surface of the ring facing the upper end of the wellbore provides fluid resisting piston surface and permits the centered tool to be pumped down the wellbore more effectively.
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