Method and apparatus for preventing spillage or loss of...

Wells – Processes – Producing the well

Reexamination Certificate

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Details

C166S055000, C166S081100, C166S241600, C166S298000, C175S209000, C175S217000, C408S067000

Reexamination Certificate

active

07134502

ABSTRACT:
A well bore fluid recovery system and method for recovering a column of well bore fluid within a stand of casing before cutting the casing. The recovery system relates to a system for preventing fluids from being spilled when casing is being finished for a well bore. After being run the casing must be cut and finished at an appropriate level to install rig equipment such as blow out preventers along with other equipment. However, because of earlier operations, the entire length of casing is typically filled with drilling fluid. Depending on conditions, the length of casing which is to be cut and removed may therefore over a 100-foot (27.4 meter) column of drilling fluid therein. The drilling fluid in this section must be properly drained before the casing is cut and removed.

REFERENCES:
patent: 2353412 (1944-07-01), Miller
patent: 2513714 (1950-07-01), Cordes
patent: 2522444 (1950-09-01), Grable
patent: 3559739 (1971-02-01), Hutchison
patent: 4450905 (1984-05-01), Crain
patent: 4577702 (1986-03-01), Faulkner
patent: 5295536 (1994-03-01), Bode
patent: 6119772 (2000-09-01), Pruet
patent: 6474418 (2002-11-01), Miramon
patent: 6595288 (2003-07-01), Mosing et al.
patent: 7021381 (2006-04-01), Remedies et al.

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