Rotator for wireline conveyed wellbore instruments and method for rotating an instrument in a wellbore
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United States of America Patent
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Nov 30, 2010
Issued Date -
N/A
app pub date -
May 8, 2008
filing date -
May 8, 2008
priority date (Note) -
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status (Latency Note)
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Abstract
An apparatus for rotating an instrument in a wellbore includes a non magnetic housing configured to traverse the interior of the wellbore. The housing has an external diameter smaller than an internal diameter of a casing disposed in the wellbore. A plurality of electromagnets is arranged circumferentially about the interior of the housing and is configured to induce magnetic flux through a wall of the housing when actuated. A controller configured to sequentially rotationally actuate the electromagnets. A method for rotating a wellbore instrument in a wellbore includes causing parts of an instrument housing to be sequentially rotationally magnetically attracted to a casing disposed in the wellbore. The housing has a smaller external diameter than an internal diameter of the casing. The sequential rotational magnetic attraction is continued as needed.
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