Fluid handling – Processes – Cleaning – repairing – or assembling
Reexamination Certificate
2011-05-10
2011-05-10
Lee, Kevin L (Department: 3753)
Fluid handling
Processes
Cleaning, repairing, or assembling
C137S318000
Reexamination Certificate
active
07938137
ABSTRACT:
A method of hot tapping into a multiple string configuration for obtaining access to the production tubing without removing outer layers of casing by providing a multiple casing string that includes at least an outer casing and an inner casing or production string; mounting a clamp assembly around the wall of the outer casing; hot tapping a small opening through the outer casing wall to capture any pressurized fluid through the opening; cutting first and second large openings through the wall of the outer casing to access the inner casing, each opening being approximately 180 degrees from the other opening; through the first opening, drilling a small hole through the wall of the inner casing to capture any pressurized fluid through the opening in the inner casing; and inserting an anvil through the second opening to contact and stabilize the wall of the inner casing to prevent the casing from moving while the casing is drilled.
REFERENCES:
patent: 4332272 (1982-06-01), Wendell
patent: 7021325 (2006-04-01), Maichel et al.
patent: 7552742 (2009-06-01), Dole
patent: 2010/0243072 (2010-09-01), McGraw et al.
Angers, Jr. John William
Cenac Martin
Robichaux Richard J.
Blowout Tools, Inc.
Garvey, Smith Nehrbass & North, L.L.C.
Lee Kevin L
Smith Gregory C.
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