Adapters for double-locking casing mandrel and method of...

Wells – Processes – Assembling well part

Reexamination Certificate

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C166S085400, C166S075140

Reexamination Certificate

active

07040410

ABSTRACT:
Adapters for connecting to a double-locking casing mandrel of an independent screwed wellhead include a lockdown flange with an adapter pin, and a retainer flange that may be used with or without the adapter pin. The retainer flange has a top surface with circumferentially-spaced threaded bores that permit well stimulation equipment to be mounted thereto. The retainer flange threadedly connects to a pin thread at a top of the casing mandrel, and therefore provides a low profile mounting flange for well stimulation equipment.

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U.S. Appl. No. 10/336,911, entitled “Backpressure Adapter Pin and Methods of Use,” filed Jan. 6, 2003.
U.S. Appl. No. 10/440,795, entitled “Casing Mandrel with Well Stimulation Tool and Tubing Head Spool for Use with the Casting Mandrel,” filed May 19, 2003.
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