EP2580423B1 - Leckagerückhaltesystem für leckende untersee bohrlöcher - Google Patents

Leckagerückhaltesystem für leckende untersee bohrlöcher Download PDF

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Publication number
EP2580423B1
EP2580423B1 EP20110727339 EP11727339A EP2580423B1 EP 2580423 B1 EP2580423 B1 EP 2580423B1 EP 20110727339 EP20110727339 EP 20110727339 EP 11727339 A EP11727339 A EP 11727339A EP 2580423 B1 EP2580423 B1 EP 2580423B1
Authority
EP
European Patent Office
Prior art keywords
bop
oil
methanol
sleeve
chimney
Prior art date
Legal status (The legal status 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 status listed.)
Not-in-force
Application number
EP20110727339
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English (en)
French (fr)
Other versions
EP2580423A2 (de
Inventor
Rene Pascal Emile Freund
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
BOREALIS OFFSHORE CONSULTANTS AS
Original Assignee
BOREALIS OFFSHORE CONSULTANTS AS
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Filing date
Publication date
Application filed by BOREALIS OFFSHORE CONSULTANTS AS filed Critical BOREALIS OFFSHORE CONSULTANTS AS
Publication of EP2580423A2 publication Critical patent/EP2580423A2/de
Application granted granted Critical
Publication of EP2580423B1 publication Critical patent/EP2580423B1/de
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
    • E21B43/01—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells specially adapted for obtaining from underwater installations
    • E21B43/0122—Collecting oil or the like from a submerged leakage

Definitions

  • the present invention concerns an assembly forming a containment system for run-away subsea wells.
  • Said system comprises a sleeve with dimensions larger than the relevant Blow-Out Preventer (BOP) device of the oil-well topped by a frustrum roof forming a funnel above the BOP, said roof being equipped with an exhaust chimney with a closure valve including a connection device for anchoring sealing and/or anchoring equipment to said exhaust chimney, the assembly further comprising a number of suction anchor pods disposed at the periphery of the sleeve, said sleeve also including an injection inlet for grout at its base and said roof including at least one injection inlet for methanol and at least one outlet oil/water/methanol mixture.
  • the sleeve may in a preferred embodiment include a level gauge for monitoring the level of injected grout.
  • US-4,318,442 discloses a containment system according to the preamble of claim 1.
  • One of the problems to be solved with the present invention is to provide a containment system for run-away oil wells in deep-sea drilling.
  • An offshore exploration well especially in deep-water and/or under HP/HT conditions (up to 1200 bars pressure and 200 °C temperature) is mandatorily equipped with a blow-out preventer (BOP) which shuts down the well automatically when abnormal pressure is encountered in order to stop the uncontrolled gushing of fluids.
  • BOP blow-out preventer
  • Mitigating the oil leakage is complicated further by the formation of hydrates at such depths as water mixes with methane, said hydrates clogging up export lines which convey the oil/water mixture in potential rescue devices.
  • BOPs according to the prior art include the device disclosed in US patent 4.416.565 A comprising a cylinder with a funnel-shaped roof being constructed as a chimney with a valve to be placed over a well with an uncontrolled blow-out.
  • the cylinder has an exit leading oil and gas to the surface.
  • blow-out rescue device according to the present invention is disclosed infra under reference to the enclosed figure.
  • the containment system according to the present invention comprises the following elements:
  • the material of the parts of the device/system according to the present invention is to be metal or a metal alloy withstanding the conditions of pressure and temperature existing at the oil-well in question. Also the metal or metal alloy should be non-corrosive (at least for a period of time relevant for making the oil-well safe).
  • the metal of choice is steel, tempered steel or stainless steel.
  • the present invention also includes a process for stopping the oil and gas outflow from a run-away oil-well (uncontrolled blow-out).
  • the process for stopping such outflow includes the following steps:

Landscapes

  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Geology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Fluid Mechanics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Earth Drilling (AREA)
  • Physical Or Chemical Processes And Apparatus (AREA)

Claims (3)

  1. Ein Konstrukt wie ein Behälter das eines Sicherungssystems für auslaufende Ölquellen bildet, bestehend aus einer Hülse (1a), deren Umfang größer als das entsprechende Bohrlochabsperrventil (BOP) ist, die mit einem kegelförmigen Dach gekrönt ist, wobei das Dach mit einem Abgaskamin mit einem Verschlussventil ausgestattet ist, das wiederum die Verankerungs- und Abdichtungstechnik mit dem Abgaskamin verbindet. Des Weiteren beinhaltet die Konstruktion eine Zahl von Saugankereimer, die am Rand der Hülse angeordnet sind, wobei es an der Unterseite der Hülse eine Einspritzanlage für Fugenmasse und an der Oberseite mindestens eine Einspritzanlage für Methanol und mindestens einen Abfluss für das Öl/Wasser/Methanol Gemisch gibt.
  2. Konstrukt entsprechend Anspruch 1, wobei die Hülse eine Füllstandsanzeige für die Überwachung der Menge der injizierten Fugenmasse enthält.
  3. Das Verfahren zur Stilllegung einer auslaufenden Ölquelle bei einem beschädigten BOP, umfasst folgende Schritte:
    1. der Behälter des Konstrukts wird entsprechend Anspruch 1 oder 2 über das BOP gestülpt, wobei das Abgaskaminventil offen sein muss, um freien Auslass der Öl-und Gas- Mischung zu erlauben, die an der Spitze des (beschädigten) BOP explodiert, wobei Methanol zu diesem frühen Zeitpunkt durch Einlass (4) eingespritzt wird, um Hydratbildung und Verstopfung des Kamins zu verhindern;
    2. die Ventile der Saugankereimer (2) werden aktiviert, um einen hydrostatischen Unterdruck zu schaffen, der ausreicht, um den Hauptbehälter (1) tief im Meeresboden zu versenken und so adäquate Abdichtung an der Basis zu erreichen;
    3. Fugenmasse wird dann am unteren Ende der Hülse injiziert, um seinen Annulus (Ringraum zwischen dem BOP und der Innenwand der Hülse), einschließlich des BOP zu füllen und so eine gute Verbindung der beiden Objekte sicherzustellen. Der Füllvorgang der Fugenmasse in den Annulus wird überwacht, bis die Freifläche der Fugenmasse die Spitze der Hülse an deren Schnittpunkt mit dem kegelförmigen Dach erreicht. Während dieser Phase bleibt der Kamin offen und erlaubt so weiterhin freien Durchfluss der Flüssigkeit, die aus dem BOP explodiert, und auch des Meerwassers, das innerhalb des Behälters eingeschlossen ist und von der Fugenmasse verdrängt wird;
    4. nachdem das Verfugen abgeschlossen ist, entspricht das übriggeblieben Meerwasser mehr oder weniger dem Volumen des konischen Dachs, wo das Meerwasser mit Öl und Gas aus dem Bohrloch und mit Methanol, das weiter injiziert wird, vermischt wird;
    5. da immer mehr Methanol injiziert wird, erhöht sich die Methanol Konzentration in der Mischung, während die des Meerwassers solange sinkt, bis der kritische Grenzwert der Hydratbildung erreicht ist. Das Abgaskaminventil wird dann schrittweise geschlossen, während sich eine der Abflussleitungen (5) öffnet, die dann eine Mischung transportiert, die fast usschließlich aus Erdöl, Erdgas und Methanol besteht und nicht mehr anfällig für die Bildung von Hydraten ist.
EP20110727339 2010-06-10 2011-06-10 Leckagerückhaltesystem für leckende untersee bohrlöcher Not-in-force EP2580423B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NO20100830A NO334010B1 (no) 2010-06-10 2010-06-10 Utslippoppdemmingsanordning for undervannsutblåsende oljebrønner
PCT/NO2011/000170 WO2011155848A2 (en) 2010-06-10 2011-06-10 Leakage containment system for run-away subsea wells

Publications (2)

Publication Number Publication Date
EP2580423A2 EP2580423A2 (de) 2013-04-17
EP2580423B1 true EP2580423B1 (de) 2015-05-20

Family

ID=44627403

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20110727339 Not-in-force EP2580423B1 (de) 2010-06-10 2011-06-10 Leckagerückhaltesystem für leckende untersee bohrlöcher

Country Status (4)

Country Link
US (1) US20130140036A1 (de)
EP (1) EP2580423B1 (de)
NO (1) NO334010B1 (de)
WO (1) WO2011155848A2 (de)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NO337710B1 (no) * 2013-05-22 2016-06-06 Borealis Offshore Consultants As Beholder-sammenstilling for omslutting og kontroll av en undervannsbrønn ved ukontrollert utblåsing og fremgangsmåte for islolering og kontroll av en ukontrollert utblåsende undersjøisk oljebrønn
GB2516923A (en) * 2013-08-07 2015-02-11 John Butkus Sub-Sea oil / gas capping device
BR112016006924A2 (pt) * 2013-10-21 2017-08-01 Total Sa sistema de contenção e método para usar dito sistema de contenção
WO2015105952A1 (en) * 2014-01-13 2015-07-16 Shell Oil Company Methods of preventing hydrate formation in open water capture devices
CN105501416B (zh) * 2015-12-16 2018-06-01 深圳海油工程水下技术有限公司 水下集油箱及其使用方法

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3548605A (en) * 1969-05-07 1970-12-22 Texaco Development Corp Submergible vehicle for emergency offshore gas leakage
US4318442A (en) * 1979-09-27 1982-03-09 Ocean Resources Engineering, Inc. Method and apparatus for controlling an underwater well blowout
US4283159A (en) * 1979-10-01 1981-08-11 Johnson Albert O Protective shroud for offshore oil wells
NO153938C (no) 1979-11-02 1986-06-18 Ostlund As Fremgangsmaate ved oppfangning og separasjon av olje, vann og gass fra en oljebroenn og en utligningskolonne for utfoerelse av fremgangsmaaten.
FR2852917B1 (fr) 2003-03-26 2005-06-24 Saipem Sa Receptacle a compartiments etanches et procede de mise en place pour recuperer des effluents polluants d'une epave
US20110299930A1 (en) * 2010-06-04 2011-12-08 Messina Frank D Subsea oil leak stabilization system and method

Also Published As

Publication number Publication date
NO334010B1 (no) 2013-11-18
WO2011155848A2 (en) 2011-12-15
WO2011155848A3 (en) 2012-04-12
EP2580423A2 (de) 2013-04-17
NO20100830A1 (no) 2011-12-12
US20130140036A1 (en) 2013-06-06

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