Wells – Processes – Placing or shifting well part
Reexamination Certificate
2004-08-05
2008-08-12
Bagnell, David J. (Department: 3676)
Wells
Processes
Placing or shifting well part
C166S379000, C166S065100
Reexamination Certificate
active
07410002
ABSTRACT:
Wellhead assembly and method for providing power connection to downhole electrical device. Wellhead body members support vertically stacked isolated tubing hanger and grounding tubing hanger. The isolated tubing hanger suspends a conducting tubing string, while the grounding tubing hanger suspends a grounding tubing string concentrically spaced from the conducting tubing string. The isolated tubing hanger has an outer housing, an inner electrically conducting portion supported by the outer housing to provide electrical connection with, and suspend, the conducting tubing string, and insulation between the housing and conducting portion to electrically isolate the housing. Hot electrical connection is made through a conduit in the wellhead body member, for electrical connection to the conducting tubing string. Grounding connection is provided to the wellhead body members.
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“Specification for Wellhead and Christmas Tree Equipment,” ANSI/API Specification 6A, Nineteenth Edition, Jul. 2004.
Khazanovich Abram
Khazanovich Irina
Kwasniewski Nathan
Bagnell David J.
Greenlee Winner and Sullivan P.C.
Harcourt Brad
Stream-Flo Industries Ltd.
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