IN2012DN02965A - - Google Patents

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Publication number
IN2012DN02965A
IN2012DN02965A IN2965DEN2012A IN2012DN02965A IN 2012DN02965 A IN2012DN02965 A IN 2012DN02965A IN 2965DEN2012 A IN2965DEN2012 A IN 2965DEN2012A IN 2012DN02965 A IN2012DN02965 A IN 2012DN02965A
Authority
IN
India
Prior art keywords
subsea
influx
mud
well bore
choke manifold
Prior art date
Application number
Inventor
Kurt Mix
Robert Myers
Original Assignee
Bp Corp North America Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Bp Corp North America Inc filed Critical Bp Corp North America Inc
Publication of IN2012DN02965A publication Critical patent/IN2012DN02965A/en

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
    • E21B21/08—Controlling or monitoring pressure or flow of drilling fluid, e.g. automatic filling of boreholes, automatic control of bottom pressure
    • E21B21/082—Dual gradient systems, i.e. using two hydrostatic gradients or drilling fluid densities
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
    • E21B21/001—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor specially adapted for underwater drilling

Abstract

Methods and systems for drilling subsea wells bores with dual-gradient mud systems include drilling the subsea well bore while employing a subsea pumping system, a subsea choke manifold and one or more mud return risers to implement the dual gradient mud system. When a well bore influx is detected, the well bore is shut in, and components determine if pressure control may be used to circulate the influx out of the well bore, the size of the influx, and how much the mud system weight will need to be reduced to match the dual gradient hydrostatic head before the influx reaches the subsea pump take point. The subsea pumping system, subsea choke manifold, and mud risers are isolated while the influx is circulated up one or more fluid passages in the drilling riser package using the surface pump, through the wellhead, and out the surface choke manifold.
IN2965DEN2012 2009-09-10 2010-09-09 IN2012DN02965A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US24132009P 2009-09-10 2009-09-10
PCT/US2010/048239 WO2011031836A2 (en) 2009-09-10 2010-09-09 Systems and methods for circulating out a well bore influx in a dual gradient environment

Publications (1)

Publication Number Publication Date
IN2012DN02965A true IN2012DN02965A (en) 2015-07-31

Family

ID=43729348

Family Applications (1)

Application Number Title Priority Date Filing Date
IN2965DEN2012 IN2012DN02965A (en) 2009-09-10 2010-09-09

Country Status (9)

Country Link
US (1) US8517111B2 (en)
EP (1) EP2475840B1 (en)
CN (1) CN102575501B (en)
AU (1) AU2010292219B2 (en)
CA (1) CA2773188C (en)
EA (1) EA024854B1 (en)
IN (1) IN2012DN02965A (en)
MX (1) MX2012002832A (en)
WO (1) WO2011031836A2 (en)

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Also Published As

Publication number Publication date
EP2475840B1 (en) 2014-11-12
EP2475840A2 (en) 2012-07-18
WO2011031836A2 (en) 2011-03-17
MX2012002832A (en) 2012-04-19
US20110061872A1 (en) 2011-03-17
EA201200295A1 (en) 2012-08-30
CA2773188C (en) 2017-09-26
CN102575501B (en) 2015-05-20
WO2011031836A3 (en) 2011-06-30
EA024854B1 (en) 2016-10-31
US8517111B2 (en) 2013-08-27
AU2010292219A1 (en) 2012-04-12
AU2010292219B2 (en) 2014-09-04
CN102575501A (en) 2012-07-11
CA2773188A1 (en) 2011-03-17

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