Boring or penetrating the earth – With tool shaft detail
Reexamination Certificate
2011-05-03
2011-05-03
Thompson, Kenneth (Department: 3676)
Boring or penetrating the earth
With tool shaft detail
C439S005000
Reexamination Certificate
active
07934570
ABSTRACT:
In one aspect of the invention, a swivel for use in a drilling operation comprises a body with a central bore adapted for threaded connection to a tool string component. At least one electrically conductive medium is rotationally supported within the bore and adapted to rotate with respect to an electrically conductive receiver that is rotationally fixed to and disposed within the body. The electrically conductive medium and the receiver are in electrical communication through an electrically conductive arm that is rotationally fixed to the electrically conductive medium and at least partially disposed within an electrically conductive fluid disposed within a reservoir. The reservoir comprises a rigid shape that is partially filled by the conductive fluid. At least one rotary seal is disposed intermediate the reservoir and the electrically conductive medium. The rigid shape of the reservoir is adapted to prevent the conductive fluid from accumulating around the rotary seal.
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Dahlgren Scott
Hall David R.
Marshall Jonathan
Holme Roberts & Owen LLP
Michener Blake
Schlumberger Technology Corporation
Thompson Kenneth
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