Login| Sign Up| Help| Contact|

Patent Searching and Data


Title:
SYSTEM AND METHODS FOR CONTROLLED MUD CAP DRILLING
Document Type and Number:
WIPO Patent Application WO/2017/195175
Kind Code:
A3
Abstract:
A subsea drilling method for controlling the bottom hole annular pressure and downward injection rate during mud cap drilling operations from a mobile offshore drilling unit with a low pressure marine riser and subsea blowout preventer. The method called controlled mud cap drilling uses the hydrostatic head of a heavy annular mud (fluid) managed or observed in order to balance the highest pore pressure in the well and to control the injection rate, by using a subsea mud lift pump and a control system to regulate the process.

Inventors:
FOSSLI BØRRE (NO)
Application Number:
PCT/IB2017/052823
Publication Date:
December 21, 2017
Filing Date:
May 12, 2017
Export Citation:
Click for automatic bibliography generation   Help
Assignee:
ENHANCED DRILLING A S (NO)
International Classes:
E21B43/38; E21B21/00; E21B21/08; E21B47/04
Domestic Patent References:
WO2009123476A12009-10-08
WO2011058031A22011-05-19
WO2006118920A22006-11-09
Download PDF: