Method and apparatus to provide electrical connection in a...

Wells – Processes – Placing or shifting well part

Reexamination Certificate

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Details

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.

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