Arrangement and method for regulating bottom hole pressures...

Details Arrangement and method for regulating bottom hole pressures... Arrangement and method for regulating bottom hole pressures...

2007-09-04

2007-09-04

Zeender, F. (Department: 3627)

Wells

Submerged well

Riser

C166S364000, C175S005000, C175S025000, C175S038000, C175S072000

Reexamination Certificate

active

10489236

ABSTRACT:
An arrangement and a method to control and regulate the bottom hole pressure in a well during subsea drilling at deep waters: The method involves adjustment of a liquid/gas interface level in a drilling riser up or down. The arrangement comprises a high pressure drilling riser and a surface BOP at the upper end of the drilling riser. The surface BOP havs a gas bleeding outlet. The riser also comprises a BOP, with a by-pass line. The drilling riser has an outlet at a depth below the water surface, and the outlet is connected to a pumping system with a flow return conduit running back to a drilling vessel/platform.

REFERENCES:
patent: 4063602 (1977-12-01), Howell et al.
patent: 4091881 (1978-05-01), Maus
patent: 4291772 (1981-09-01), Beynet
patent: 6276455 (2001-08-01), Gonzalez
patent: 6454022 (2002-09-01), Sangesland et al.
patent: 6648081 (2003-11-01), Fincher et al.
patent: 2787827 (2000-06-01), None
NO Search Report dated Feb. 15, 2005 of Patent Application No. PCT/NO02/00317 filed Sep. 10, 2002.

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