WO2010104634A3 - System and method for dynamically adjusting the center of gravity of a perforating apparatus - Google Patents

System and method for dynamically adjusting the center of gravity of a perforating apparatus Download PDF

Info

Publication number
WO2010104634A3
WO2010104634A3 PCT/US2010/023545 US2010023545W WO2010104634A3 WO 2010104634 A3 WO2010104634 A3 WO 2010104634A3 US 2010023545 W US2010023545 W US 2010023545W WO 2010104634 A3 WO2010104634 A3 WO 2010104634A3
Authority
WO
WIPO (PCT)
Prior art keywords
gravity
perforating apparatus
center
charge
charge holder
Prior art date
Application number
PCT/US2010/023545
Other languages
French (fr)
Other versions
WO2010104634A2 (en
Inventor
John H. Hales
Allison E. Novak
John D. Burleson
Original Assignee
Halliburton Energy Services, 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 Halliburton Energy Services, Inc. filed Critical Halliburton Energy Services, Inc.
Priority to CA2752959A priority Critical patent/CA2752959C/en
Priority to MX2014001408A priority patent/MX353477B/en
Priority to MX2011009545A priority patent/MX2011009545A/en
Priority to BR122012001008-1A priority patent/BR122012001008A2/en
Priority to MX2014001406A priority patent/MX351252B/en
Priority to EP10705034.6A priority patent/EP2406459B1/en
Priority to BR122012001010-3A priority patent/BR122012001010A2/en
Publication of WO2010104634A2 publication Critical patent/WO2010104634A2/en
Publication of WO2010104634A3 publication Critical patent/WO2010104634A3/en

Links

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
    • E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
    • E21B43/11—Perforators; Permeators
    • E21B43/119—Details, e.g. for locating perforating place or direction

Abstract

A perforating apparatus (100) used to perforate a subterranean well. The perforating apparatus (100) includes a generally tubular gun carrier (106) and a charge holder (104) rotatably mounted within the gun carrier (106). At least one shaped charge (102) is mounted in the charge holder (104) and is operable to perforate the well upon detonation. A dynamically adjustable weight system (124) is operably associated to the charge holder (104). The dynamically adjustable weight system (124) is operable to adjust the center of gravity (120) of the charge holder (104) such that gravity will cause the charge holder (104) to rotate within the gun carrier (106) to position the at least one shaped charge (102) in a desired circumferential direction relative to the well prior to perforating.
PCT/US2010/023545 2009-03-13 2010-02-09 System and method for dynamically adjusting the center of gravity of a perforating apparatus WO2010104634A2 (en)

Priority Applications (7)

Application Number Priority Date Filing Date Title
CA2752959A CA2752959C (en) 2009-03-13 2010-02-09 System and method for dynamically adjusting the center of gravity of a perforating apparatus
MX2014001408A MX353477B (en) 2009-03-13 2010-02-09 System and method for dynamically adjusting the center of gravity of a perforating apparatus.
MX2011009545A MX2011009545A (en) 2009-03-13 2010-02-09 System and method for dynamically adjusting the center of gravity of a perforating apparatus.
BR122012001008-1A BR122012001008A2 (en) 2009-03-13 2010-02-09 drilling rig used for drilling an underground well and method of drilling an underground well
MX2014001406A MX351252B (en) 2009-03-13 2010-02-09 System and method for dynamically adjusting the center of gravity of a perforating apparatus.
EP10705034.6A EP2406459B1 (en) 2009-03-13 2010-02-09 System and method for dynamically adjusting the center of gravity of a perforating apparatus
BR122012001010-3A BR122012001010A2 (en) 2009-03-13 2010-02-09 drilling rig used for drilling an underground well and method of drilling an underground well

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US12/403,420 2009-03-13
US12/403,420 US7934558B2 (en) 2009-03-13 2009-03-13 System and method for dynamically adjusting the center of gravity of a perforating apparatus

Publications (2)

Publication Number Publication Date
WO2010104634A2 WO2010104634A2 (en) 2010-09-16
WO2010104634A3 true WO2010104634A3 (en) 2010-11-11

Family

ID=42727575

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2010/023545 WO2010104634A2 (en) 2009-03-13 2010-02-09 System and method for dynamically adjusting the center of gravity of a perforating apparatus

Country Status (6)

Country Link
US (4) US7934558B2 (en)
EP (4) EP2406459B1 (en)
CA (4) CA2759304C (en)
CO (1) CO6450664A2 (en)
MX (4) MX2011009545A (en)
WO (1) WO2010104634A2 (en)

Families Citing this family (60)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8365814B2 (en) * 2007-09-20 2013-02-05 Baker Hughes Incorporated Pre-verification of perforation alignment
US8443886B2 (en) 2010-08-12 2013-05-21 CCS Leasing and Rental, LLC Perforating gun with rotatable charge tube
US9689223B2 (en) 2011-04-01 2017-06-27 Halliburton Energy Services, Inc. Selectable, internally oriented and/or integrally transportable explosive assemblies
US10337299B2 (en) * 2012-03-02 2019-07-02 Halliburton Energy Services, Inc. Perforating apparatus and method having internal load path
US20220258103A1 (en) 2013-07-18 2022-08-18 DynaEnergetics Europe GmbH Detonator positioning device
US9702680B2 (en) 2013-07-18 2017-07-11 Dynaenergetics Gmbh & Co. Kg Perforation gun components and system
AU2015217124B2 (en) * 2014-02-12 2018-09-13 Owen Oil Tools Lp Perforating gun with eccentric rotatable charge tube
US10188990B2 (en) 2014-03-07 2019-01-29 Dynaenergetics Gmbh & Co. Kg Device and method for positioning a detonator within a perforating gun assembly
CA2933570C (en) * 2014-05-21 2018-05-01 Hunting Titan, Inc. Shaped charge retainer system
WO2016039888A1 (en) 2014-09-08 2016-03-17 Exxonmobil Upstream Research Company Autonomous wellbore devices with orientation-regulating structures and systems and methods including the same
CN104453799A (en) * 2014-09-30 2015-03-25 西安物华巨能爆破器材有限责任公司 Inner orientation inclined shaft fixed-ejection-angle positioning perforating device
US9115572B1 (en) * 2015-01-16 2015-08-25 Geodynamics, Inc. Externally-orientated internally-corrected perforating gun system and method
CN104989335B (en) * 2015-06-23 2018-03-23 西安物华巨能爆破器材有限责任公司 Firing angle perforating system is determined in a kind of measurable interior orientation orientation in orientation
US9725993B1 (en) 2016-10-13 2017-08-08 Geodynamics, Inc. Constant entrance hole perforating gun system and method
US10753183B2 (en) 2016-10-13 2020-08-25 Geodynamics, Inc. Refracturing in a multistring casing with constant entrance hole perforating gun system and method
DE112016007344T5 (en) * 2016-12-30 2019-06-27 Halliburton Energy Services, Inc. Modular charge holder segment
NO343254B1 (en) * 2017-07-05 2018-12-27 Tco As Gun for oriented perforation
US11414965B2 (en) 2018-02-27 2022-08-16 Schlumberger Technology Corporation Rotating loading tube and angled shaped charges for oriented perforating
US11053782B2 (en) 2018-04-06 2021-07-06 DynaEnergetics Europe GmbH Perforating gun system and method of use
WO2019229521A1 (en) 2018-05-31 2019-12-05 Dynaenergetics Gmbh & Co. Kg Systems and methods for marker inclusion in a wellbore
US11661824B2 (en) 2018-05-31 2023-05-30 DynaEnergetics Europe GmbH Autonomous perforating drone
US11591885B2 (en) 2018-05-31 2023-02-28 DynaEnergetics Europe GmbH Selective untethered drone string for downhole oil and gas wellbore operations
US10794159B2 (en) 2018-05-31 2020-10-06 DynaEnergetics Europe GmbH Bottom-fire perforating drone
US11408279B2 (en) 2018-08-21 2022-08-09 DynaEnergetics Europe GmbH System and method for navigating a wellbore and determining location in a wellbore
US10458213B1 (en) 2018-07-17 2019-10-29 Dynaenergetics Gmbh & Co. Kg Positioning device for shaped charges in a perforating gun module
US10386168B1 (en) 2018-06-11 2019-08-20 Dynaenergetics Gmbh & Co. Kg Conductive detonating cord for perforating gun
US11808093B2 (en) 2018-07-17 2023-11-07 DynaEnergetics Europe GmbH Oriented perforating system
US11339614B2 (en) 2020-03-31 2022-05-24 DynaEnergetics Europe GmbH Alignment sub and orienting sub adapter
WO2020038848A1 (en) 2018-08-20 2020-02-27 DynaEnergetics Europe GmbH System and method to deploy and control autonomous devices
USD1019709S1 (en) 2019-02-11 2024-03-26 DynaEnergetics Europe GmbH Charge holder
USD1010758S1 (en) 2019-02-11 2024-01-09 DynaEnergetics Europe GmbH Gun body
US10689955B1 (en) 2019-03-05 2020-06-23 SWM International Inc. Intelligent downhole perforating gun tube and components
US11078762B2 (en) * 2019-03-05 2021-08-03 Swm International, Llc Downhole perforating gun tube and components
US11268376B1 (en) 2019-03-27 2022-03-08 Acuity Technical Designs, LLC Downhole safety switch and communication protocol
US11913767B2 (en) 2019-05-09 2024-02-27 XConnect, LLC End plate for a perforating gun assembly
US10927627B2 (en) 2019-05-14 2021-02-23 DynaEnergetics Europe GmbH Single use setting tool for actuating a tool in a wellbore
US11578549B2 (en) 2019-05-14 2023-02-14 DynaEnergetics Europe GmbH Single use setting tool for actuating a tool in a wellbore
US11255147B2 (en) 2019-05-14 2022-02-22 DynaEnergetics Europe GmbH Single use setting tool for actuating a tool in a wellbore
CN113994070A (en) 2019-05-16 2022-01-28 斯伦贝谢技术有限公司 Modular perforation tool
WO2020249744A2 (en) * 2019-06-14 2020-12-17 DynaEnergetics Europe GmbH Perforating gun assembly with rotating shaped charge holder
CN114174632A (en) 2019-07-19 2022-03-11 德力能欧洲有限公司 Ballistic actuated wellbore tool
WO2021116336A1 (en) 2019-12-10 2021-06-17 DynaEnergetics Europe GmbH Initiator head with circuit board
US11480038B2 (en) 2019-12-17 2022-10-25 DynaEnergetics Europe GmbH Modular perforating gun system
US11225848B2 (en) 2020-03-20 2022-01-18 DynaEnergetics Europe GmbH Tandem seal adapter, adapter assembly with tandem seal adapter, and wellbore tool string with adapter assembly
USD981345S1 (en) 2020-11-12 2023-03-21 DynaEnergetics Europe GmbH Shaped charge casing
US11619119B1 (en) 2020-04-10 2023-04-04 Integrated Solutions, Inc. Downhole gun tube extension
USD904475S1 (en) 2020-04-29 2020-12-08 DynaEnergetics Europe GmbH Tandem sub
USD908754S1 (en) 2020-04-30 2021-01-26 DynaEnergetics Europe GmbH Tandem sub
USD1016958S1 (en) 2020-09-11 2024-03-05 Schlumberger Technology Corporation Shaped charge frame
US11293271B1 (en) 2020-10-28 2022-04-05 Halliburton Energy Services, Inc. Low-profile adjustable fastener for charge orientation of a downhole perforating tool
US11512565B2 (en) * 2020-12-01 2022-11-29 Halliburton Energy Services, Inc. Plastic weight assembly for downhole perforating gun
WO2022122742A2 (en) * 2020-12-09 2022-06-16 DynaEnergetics Europe GmbH Equal entry hole perforating gun system with position optimized shaped charges
US11391127B1 (en) * 2020-12-31 2022-07-19 Halliburton Energy Services, Inc. Adjustable perforating gun orientation system
US11499401B2 (en) 2021-02-04 2022-11-15 DynaEnergetics Europe GmbH Perforating gun assembly with performance optimized shaped charge load
CA3206497A1 (en) 2021-02-04 2022-08-11 Christian EITSCHBERGER Perforating gun assembly with performance optimized shaped charge load
US11732556B2 (en) 2021-03-03 2023-08-22 DynaEnergetics Europe GmbH Orienting perforation gun assembly
WO2022184654A1 (en) * 2021-03-03 2022-09-09 DynaEnergetics Europe GmbH Modular perforating gun system
US11713625B2 (en) 2021-03-03 2023-08-01 DynaEnergetics Europe GmbH Bulkhead
US11655692B2 (en) * 2021-06-18 2023-05-23 Halliburton Energy Services, Inc. Shaped charge orientation
US11753889B1 (en) 2022-07-13 2023-09-12 DynaEnergetics Europe GmbH Gas driven wireline release tool

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4637478A (en) * 1982-10-20 1987-01-20 Halliburton Company Gravity oriented perforating gun for use in slanted boreholes
US20030098158A1 (en) * 2001-11-28 2003-05-29 George Flint R. Internally oriented perforating apparatus
US20030188867A1 (en) * 2001-04-27 2003-10-09 Parrott Robert A. Method and apparatus for orienting perforating devices

Family Cites Families (43)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4269278A (en) * 1977-10-17 1981-05-26 Peabody Vann Method and apparatus for completing a slanted wellbore
US4194577A (en) * 1977-10-17 1980-03-25 Peabody Vann Method and apparatus for completing a slanted wellbore
US4410051A (en) * 1981-02-27 1983-10-18 Dresser Industries, Inc. System and apparatus for orienting a well casing perforating gun
FR2508538A1 (en) * 1981-06-30 1982-12-31 Schlumberger Prospection PERFORATION DEVICE FOR SURVEY
US4438810A (en) * 1981-10-26 1984-03-27 Dresser Industries, Inc. Apparatus for decentralizing and orienting a well logging or perforating instrument
US4523649A (en) * 1983-05-25 1985-06-18 Baker Oil Tools, Inc. Rotational alignment method and apparatus for tubing conveyed perforating guns
US4693314A (en) * 1986-02-18 1987-09-15 Halliburton Company Low actuation pressure bar vent
US4844161A (en) * 1988-08-18 1989-07-04 Halliburton Logging Services, Inc. Locking orientation sub and alignment housing for drill pipe conveyed logging system
US5010964A (en) * 1990-04-06 1991-04-30 Atlantic Richfield Company Method and apparatus for orienting wellbore perforations
US5040619A (en) * 1990-04-12 1991-08-20 Halliburton Logging Services, Inc. Wireline supported perforating gun enabling oriented perforations
US5211714A (en) * 1990-04-12 1993-05-18 Halliburton Logging Services, Inc. Wireline supported perforating gun enabling oriented perforations
US5223665A (en) * 1992-01-21 1993-06-29 Halliburton Company Method and apparatus for disabling detonation system for a downhole explosive assembly
US5287924A (en) * 1992-08-28 1994-02-22 Halliburton Company Tubing conveyed selective fired perforating systems
US5355957A (en) * 1992-08-28 1994-10-18 Halliburton Company Combined pressure testing and selective fired perforating systems
DE69531920T2 (en) * 1994-08-31 2004-08-19 Halliburton Energy Services, Inc., Dallas Device for connecting perforators in the borehole
US5529127A (en) * 1995-01-20 1996-06-25 Halliburton Company Apparatus and method for snubbing tubing-conveyed perforating guns in and out of a well bore
US5598894A (en) * 1995-07-05 1997-02-04 Halliburton Company Select fire multiple drill string tester
US5823266A (en) * 1996-08-16 1998-10-20 Halliburton Energy Services, Inc. Latch and release tool connector and method
US6593290B1 (en) 1996-11-01 2003-07-15 Genentech, Inc. Treatment of inner ear hair cells
US5964294A (en) * 1996-12-04 1999-10-12 Schlumberger Technology Corporation Apparatus and method for orienting a downhole tool in a horizontal or deviated well
US6012525A (en) * 1997-11-26 2000-01-11 Halliburton Energy Services, Inc. Single-trip perforating gun assembly and method
US6006833A (en) * 1998-01-20 1999-12-28 Halliburton Energy Services, Inc. Method for creating leak-tested perforating gun assemblies
US5992289A (en) * 1998-02-17 1999-11-30 Halliburton Energy Services, Inc. Firing head with metered delay
US6173773B1 (en) * 1999-04-15 2001-01-16 Schlumberger Technology Corporation Orienting downhole tools
US6591911B1 (en) * 1999-07-22 2003-07-15 Schlumberger Technology Corporation Multi-directional gun carrier method and apparatus
US6598682B2 (en) * 2000-03-02 2003-07-29 Schlumberger Technology Corp. Reservoir communication with a wellbore
US6536531B2 (en) * 2000-07-10 2003-03-25 Weatherford/Lamb, Inc. Apparatus and methods for orientation of a tubular string in a non-vertical wellbore
GB2374887B (en) * 2001-04-27 2003-12-17 Schlumberger Holdings Method and apparatus for orienting perforating devices
US6820693B2 (en) * 2001-11-28 2004-11-23 Halliburton Energy Services, Inc. Electromagnetic telemetry actuated firing system for well perforating gun
US6679327B2 (en) * 2001-11-30 2004-01-20 Baker Hughes, Inc. Internal oriented perforating system and method
GB2389379B (en) * 2002-04-02 2004-12-15 Schlumberger Holdings Method and apparatus for perforating a well
US6942033B2 (en) * 2002-12-19 2005-09-13 Schlumberger Technology Corporation Optimizing charge phasing of a perforating gun
US7147060B2 (en) * 2003-05-19 2006-12-12 Schlumberger Technology Corporation Method, system and apparatus for orienting casing and liners
US7195066B2 (en) * 2003-10-29 2007-03-27 Sukup Richard A Engineered solution for controlled buoyancy perforating
US7237487B2 (en) * 2004-04-08 2007-07-03 Baker Hughes Incorporated Low debris perforating gun system for oriented perforating
US7409999B2 (en) * 2004-07-30 2008-08-12 Baker Hughes Incorporated Downhole inflow control device with shut-off feature
US7430965B2 (en) * 2004-10-08 2008-10-07 Halliburton Energy Services, Inc. Debris retention perforating apparatus and method for use of same
US20060118303A1 (en) * 2004-12-06 2006-06-08 Halliburton Energy Services, Inc. Well perforating for increased production
US7270178B2 (en) * 2005-09-07 2007-09-18 Baker Hughes Incroporated Horizontally oriented gas separator
US7387156B2 (en) * 2005-11-14 2008-06-17 Halliburton Energy Services, Inc. Perforating safety system
US7497259B2 (en) * 2006-02-01 2009-03-03 Schlumberger Technology Corporation System and method for forming cavities in a well
US7409993B2 (en) * 2006-08-29 2008-08-12 Schlumberger Technology Corporation Weight spacer apparatus
US8186259B2 (en) * 2007-12-17 2012-05-29 Halliburton Energy Sevices, Inc. Perforating gun gravitational orientation system

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4637478A (en) * 1982-10-20 1987-01-20 Halliburton Company Gravity oriented perforating gun for use in slanted boreholes
US20030188867A1 (en) * 2001-04-27 2003-10-09 Parrott Robert A. Method and apparatus for orienting perforating devices
US20030098158A1 (en) * 2001-11-28 2003-05-29 George Flint R. Internally oriented perforating apparatus

Also Published As

Publication number Publication date
CA2759161C (en) 2014-04-08
EP2410124B1 (en) 2013-06-05
EP2410122B1 (en) 2013-06-05
US20110094743A1 (en) 2011-04-28
EP2410124A3 (en) 2012-05-30
EP2410122A2 (en) 2012-01-25
CO6450664A2 (en) 2012-05-31
EP2410123B1 (en) 2013-04-17
CA2759159C (en) 2014-05-13
WO2010104634A2 (en) 2010-09-16
CA2759161A1 (en) 2010-09-16
US7934558B2 (en) 2011-05-03
US8002035B2 (en) 2011-08-23
CA2759304C (en) 2014-04-08
EP2406459B1 (en) 2013-08-21
MX2011009545A (en) 2011-10-12
EP2410123A2 (en) 2012-01-25
MX353477B (en) 2018-01-15
EP2410123A3 (en) 2012-05-30
US8061425B2 (en) 2011-11-22
EP2406459A2 (en) 2012-01-18
EP2410122A3 (en) 2012-05-30
US20110100627A1 (en) 2011-05-05
CA2752959C (en) 2014-04-08
MX353593B (en) 2018-01-19
CA2759304A1 (en) 2010-09-16
CA2759159A1 (en) 2010-09-16
CA2752959A1 (en) 2010-09-16
EP2410124A2 (en) 2012-01-25
US8066083B2 (en) 2011-11-29
MX351252B (en) 2017-10-06
US20110094744A1 (en) 2011-04-28
US20100230163A1 (en) 2010-09-16

Similar Documents

Publication Publication Date Title
WO2010104634A3 (en) System and method for dynamically adjusting the center of gravity of a perforating apparatus
EP3846275A4 (en) Wireless charging method, electronic device, wireless charging apparatus and wireless charging system
WO2009085341A3 (en) Wireless perforating gun initiation
EP3965213A4 (en) Battery and related apparatus thereof, preparation method and preparation device
TWI268165B (en) Adjustable elliptic exercise machine comprises a body, two swinging arms, a track adjustment device, a step device, and a trechometer adjustment device
EP2072751A3 (en) Perforating gun gravitational orientation system
CA2572349A1 (en) Perforating gun
WO2012009310A3 (en) Method and apparatus for a well employing the use of an activation ball
WO2006105084A3 (en) Methods and apparatus for controlling the internal circumference of an anatomic orifice or lumen
WO2012027630A3 (en) Apparatus and method for microresistivity imaging in nonconductive drilling fluid
WO2008083049A3 (en) Deployment tool for well logging instruments conveyed through the interior of a pipe string
WO2011001295A3 (en) Method and apparatus for delivery of a tubular to a drilling apparatus
WO2011153145A3 (en) Conveyor roller servicing apparatus
UA94493C2 (en) Rotating device
EP3965212A4 (en) Battery and related apparatus thereof, and preparation method and preparation device
MY181872A (en) Gravity-based casing orientation tools and methods
TW200944003A (en) Method and apparatus for establishing a wireless network signal acquisition rate
WO2010040993A3 (en) Apparatus and method for reclaiming material
CN204062408U (en) A kind of slr camera fixing device
EP3872950A4 (en) Transmitting apparatus, receiving apparatus, power supply device and wireless charging method
AU2018263083A1 (en) A wireless electronic initiation device, an initiation arrangement and method for initiation
WO2003062108A3 (en) Web speed metering apparatus and method
CA2524101A1 (en) Method and apparatus for fluid removal from a container
DE10347142A1 (en) Seed drill has rollers mounted in pairs behind each drilling unit, rollers being adjustable to angle to vertical and angle to direction of travel
CN202765955U (en) Mechanism capable of rewinding automatically

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 10705034

Country of ref document: EP

Kind code of ref document: A2

WWE Wipo information: entry into national phase

Ref document number: 2752959

Country of ref document: CA

WWE Wipo information: entry into national phase

Ref document number: 2010705034

Country of ref document: EP

WWE Wipo information: entry into national phase

Ref document number: MX/A/2011/009545

Country of ref document: MX

NENP Non-entry into the national phase

Ref country code: DE

WWE Wipo information: entry into national phase

Ref document number: 11134831B

Country of ref document: CO

Ref document number: 11134831A

Country of ref document: CO

REG Reference to national code

Ref country code: BR

Ref legal event code: B01A

Ref document number: PI1006406

Country of ref document: BR

ENP Entry into the national phase

Ref document number: PI1006406

Country of ref document: BR

Kind code of ref document: A2

Effective date: 20110913