Wells – Means for guiding insertable element laterally of well axis
Patent
1983-04-06
1985-04-02
Novosad, Stephen J.
Wells
Means for guiding insertable element laterally of well axis
166189, 166313, 166386, E21B 2303
Patent
active
045081662
ABSTRACT:
Disclosed are a subsurface safety system and a method of inserting into or removing from an offset bore of a mandrel a tubular valve. The system includes an entry mandrel having a full bore outlet, a full bore primary inlet and a laterally offset full bore secondary inlet. A full bore primary tubing extends downwardly from the primary inlet to a formation. A full bore secondary vent tubing is connected to the secondary inlet and extends down the hole generally parallel to the primary tubing and includes an open lower end positioned in the annulus above the formation. A dual packer is provided in the system between the entry mandrel and the lower end of the secondary tubing. The secondary tubing includes a vent above the packer and the upper end of the secondary tubing is normally closed by a removable plug. Subsurface safety valves are provided in both the primary and secondary tubings. The subsurface safety valve in the secondary tubing is positioned between the open lower end and the vent.
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Becker Billy G.
Swafford Charles V.
BST Lift Systems, Inc.
Dang Hoang C.
Novosad Stephen J.
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