Arrangement and method for controlling and regulating bottom hole pressure when drilling deepwater offshore wells
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Mar 3, 2009
Grant Date -
Dec 20, 2007
app pub date -
Sep 4, 2007
filing date -
Sep 10, 2001
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
An arrangement and method for controlling and regulating bottom hole pressure in a well during subsea drilling in deep water involves adjustment of a liquid/gas interface level in a high pressure drilling riser up or down to change the slope and offset of the pressure gradient in the well. The arrangement may include a surface BOP and gas bleeding outlet at the upper end of the drilling riser, a lower BOP with a by-pass line, and an outlet at a depth below the water surface that is connected to a pumping system with a flow return conduit running back to a drilling vessel or platform.
First Claim
Family
International Classification(s)
Cited Art Landscape
Patent Citation Ranking
Advertisement
Advertisement
Advertisement
Recipient Email Address
Recipient Email Address
Comment
Recipient Email Address
Add to Portfolio(s)
To add this patent to one, or more, of your portfolios, simply click the add button.
This Patent is in these Portfolios:
Add to additional portfolios:
Last Refreshed On:
Changes done successfully