Boring or penetrating the earth – With tool shaft detail – Means other than tool structure to induce fluent flow
Reexamination Certificate
2011-07-19
2011-07-19
Stephenson, Daniel P (Department: 3676)
Boring or penetrating the earth
With tool shaft detail
Means other than tool structure to induce fluent flow
C175S339000
Reexamination Certificate
active
07980332
ABSTRACT:
In one aspect of the invention, a downhole centrifugal drilling fluid separator has a bore within a tubular body comprising a central axis. The bore is formed to receive drilling fluid comprising particulate matter. At least one fin rigidly fixed within the bore and at least one port formed in a wall of the tubular body. As the drilling fluid flows through the tubular body the at least one fin creates a rotary motion within the drilling fluid forcing a portion of the particulate matter away from the central axis and through the at least one port in the tubular body.
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Dahlgren Scott S.
Fox Joe
Hall David R.
Lundgreen David
Stephenson Daniel P
Townsend, III Philip W.
Wilde Tyson J.
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