Wells – Above ground apparatus – With assembly or disassembly means
Reexamination Certificate
2005-07-19
2005-07-19
Dang, Hoang (Department: 3672)
Wells
Above ground apparatus
With assembly or disassembly means
C166S075140, C166S097100, C166S242100, C166S192000, C166S332500
Reexamination Certificate
active
06918439
ABSTRACT:
A tubing assembly including a tubing string and tubing hanger provides a fluid passage with backpressure threads for securing a backpressure plug in a fluid-tight seal below the tubing hanger, so that the tubing hanger can be removed from the tubing string. The back pressure threads are preferably incorporated in a backpressure adapter pin connected between the tubing string and the tubing hanger. The adapter pin may also incorporate external weight-bearing shoulders for snubbing and/or suspending the tubing assembly. The backpressure plug is inserted or removed using a backpressure plug tool that slides through a packing in a pressurized casement that maintains pressure in an axial passage through a control stack of the wellhead.
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U.S. Appl. No. 10/034,032 entitled “Slip Spool and Method of Using Same,” filed Dec. 19, 2001.
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Dang Hoang
Nelson Mullins Riley & Scarborough LLP
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