WO2011051431A1 - Système de télémétrie magnétique pour contrôler un processus de forage - Google Patents

Système de télémétrie magnétique pour contrôler un processus de forage Download PDF

Info

Publication number
WO2011051431A1
WO2011051431A1 PCT/EP2010/066443 EP2010066443W WO2011051431A1 WO 2011051431 A1 WO2011051431 A1 WO 2011051431A1 EP 2010066443 W EP2010066443 W EP 2010066443W WO 2011051431 A1 WO2011051431 A1 WO 2011051431A1
Authority
WO
WIPO (PCT)
Prior art keywords
drilling
tool
magnetic field
ranging system
borehole
Prior art date
Application number
PCT/EP2010/066443
Other languages
English (en)
Inventor
Jørgen HALLUNDBAEK
Mathias Francke
Original Assignee
Welltec A/S
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 Welltec A/S filed Critical Welltec A/S
Priority to US13/500,085 priority Critical patent/US20120193144A1/en
Priority to CN2010800490265A priority patent/CN102782250A/zh
Priority to MX2012004930A priority patent/MX2012004930A/es
Priority to EP10773066A priority patent/EP2494148A1/fr
Priority to CA2774292A priority patent/CA2774292A1/fr
Priority to AU2010311357A priority patent/AU2010311357A1/en
Priority to BR112012009224A priority patent/BR112012009224A2/pt
Publication of WO2011051431A1 publication Critical patent/WO2011051431A1/fr

Links

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
    • E21B7/00—Special methods or apparatus for drilling
    • E21B7/04—Directional drilling
    • 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
    • E21B47/00—Survey of boreholes or wells
    • E21B47/02—Determining slope or direction
    • E21B47/022—Determining slope or direction of the borehole, e.g. using geomagnetism
    • E21B47/0228—Determining slope or direction of the borehole, e.g. using geomagnetism using electromagnetic energy or detectors therefor

Definitions

  • the present invention relates to a ranging system for controlling a drilling process downhole.
  • the ranging system has a longitudinal direction and comprises a drilling tool for drilling a first borehole, the drilling tool having a tool axis and comprising a magnetic field source in the form of an electromagnet generating a magnetic field and having a magnetic field source axis.
  • the ranging system comprises a sensing tool arranged in a second borehole for measuring the magnetic field by means of a sensor unit.
  • the purpose is to meet the existing well or borehole at a certain position and, in other cases, the purpose is to drill a new borehole at an exact distance to the existing borehole or well, while ensuring that the distance between the two is substantially the same along a certain stretch.
  • Known tools comprise different solutions to determine this distance.
  • the tools are used to detect magnetic fields for the purpose of determining the distance. Some tools use current in a wire in the existing borehole while others use a magnet rotating in the drilling head.
  • the magnet in the drilling head needs to rotate in order for the sensor to be able to detect the magnetic field and thus the distance of the drilling head in relation to a known position.
  • the drilling heads stops, making it impossible to detect the magnetic field and thus determine the distance and the drilling direction of the drilling head.
  • the drilling process has to be stopped to allow the magnet to be rotated and the tool to be slid back and forth further than the interwell separation, i.e. further than 5-10 meters.
  • the magnetic field sensing device is positioned in the drilling tool. Since the drilling head of the drilling tool is driven by high-pressurised fluid delivered through the drill string, transmission of data from the measurements conducted by the sensing device is very difficult. These tools produce waves in the fluid as a means of communicating data, which is a very slow means of communication and may moreover inhibit the drilling process.
  • a ranging system for controlling a drilling process downhole having a longitudinal direction and comprising :
  • drilling tool for drilling a first borehole, the drilling tool having a tool axis and comprising a magnetic field source which is an electromagnet generating a magnetic field and having a magnetic field source axis, and
  • sensing tool arranged in a second borehole for measuring the magnetic field by means of at least two sensor units
  • the sensor units are arranged at a distance from each other along an axis of the sensing tool.
  • the electromagnet does not have to move in order to make sufficient measurements to be able to calculate the position of the magnet relative to the sensing tool.
  • an imprecise distance between two sets of measurements may occur as a result; however, this is not the case when two sensor units are arranged at a fixed mutual distance.
  • the magnetic field source axis may be substantially parallel to the tool axis.
  • the magnetic field source axis may also be substantially coincident with the tool axis.
  • the sensor units may each comprise a three axis magnetometer for measuring the magnitude and direction of the magnetic field.
  • the magnetometers may be arranged in the same plane in the sensor unit.
  • the second borehole may be an existing borehole.
  • the sensor unit and/or the drilling tool may be driven by a driving unit.
  • the ranging system may further comprise a positioning tool for determining the position of the sensing tool in the second borehole or the position of the drilling tool in the first borehole.
  • This sensing tool may also have means for controlling and/or measuring the position of the sensing tool.
  • the magnetic field source may have a through hole, allowing fluid for driving a drilling head of the drilling tool to pass through the magnetic field source.
  • the ranging system may also comprise a calculation unit for processing magnitude and direction measurements of the magnetic field measured by the sensing tool.
  • the ranging system may comprise a second drilling tool, and the sensing tool may be arranged in or in connection with the second drilling tool so that the first drilling tool comprises the magnetic field source and the second drilling tool comprises the sensing tool.
  • the invention further relates to a method for using the ranging system according to the invention, comprising the steps of:
  • the steps of measuring and calculating are performed simultaneously with drilling the first borehole, meaning that the steps of measuring and calculating are performed at least once an hour, preferably at least once every 0.5 hour, more preferably at least once every 10 minutes.
  • the method may comprise the step of calculating the direction of the drilling head.
  • the method may comprise the step of adjusting the drilling direction based on the calculated relative position of the drilling tool in relation to the sensing tool. In addition, the method may comprise the step of adjusting the drilling direction based on the calculated direction and relative position of the drilling tool.
  • Fig. 1 shows a cross-sectional view of a ranging system according to the invention arranged in two boreholes downhole
  • Fig. 2 shows a partly cross-sectional view of the drilling tool
  • Fig. 3 shows the magnetic field source in perspective
  • Fig. 4 shows the sensing unit.
  • the present invention relates to a ranging system 1 for controlling a drilling process downhole, the ranging system having a longitudinal direction.
  • a ranging system 1 for controlling a drilling process downhole, the ranging system having a longitudinal direction.
  • SAGD steam assisted gravity drainage
  • the ranging system comprises a drilling tool 2 for drilling a new borehole near an existing borehole as shown in Fig. 1.
  • the drilling tool 2 comprises a drilling head 14 for drilling a first borehole into the formation, and it further comprises a magnetic field source 5 generating a magnetic field 6, which can be detected by a sensing tool 8 arranged in a second borehole in order to determine the distance between the drilling tool 2 and the sensing tool 8 while drilling and to determine the orientation of the drilling head.
  • the ranging system 1 may also be used while drilling two new boreholes.
  • the magnetic field source 5 is arranged in one drilling tool 2 and a sensor unit 10 of the sensing tool 8 is arranged in, or in connection with, another drilling tool 2.
  • one of the drilling tools 2 may comprise a positioning tool which is able to determine the position of the drilling tools in relation to the starting point or another known position.
  • the drilling tool 2 has a tool axis 4 and the magnetic field source 5 has a magnetic field source axis 7 which is substantially coincident with the tool axis 4.
  • the magnetic field source 5 may be any suitable electromagnet. By using an electromagnet, the poles can switch, and the sensor units 10 are thereby able to conduct measurements where the contribution from the earth magnetic field is effectively cancelled out.
  • the sensing tool comprises at least two sensor units 10 arranged at a distance D from each other along an axis of the sensing tool. This means that independent measurements of the magnetic field can be made simultaneously, i.e. there is no need for moving the magnet along the tool axis and thus stop drilling while conducting the measurements.
  • the conducting of measurements is dependent on the magnetic field source rotating and sliding while conducting the measurements. Thus, in prior art tools, measurements can only be performed when the drilling process is stopped.
  • the sensing tool 8 of the present invention is still capable of sensing the magnetic field 6 and thus of continuing to conduct measurements.
  • the sensing tool 8 comprises at least two sensor units 10.
  • the sensor tool 8 comprises at least two magnetometers, enabling it to calculate the exact position of the drilling head 14 in relation to the sensing tool as well as the direction in which the drilling head 14 is drilling.
  • Each magnetometer measures the local magnitude and direction of the magnetic field 6 and thus provides independent vector measurements without having to move the magnet in relation to the sensors, as is the case in the prior art.
  • the first vector corresponding to the magnitude and direction of the magnetic field 6 measured in a first sensor unit and the second vector corresponding to the magnitude and direction of the magnetic field 6 measured in a second sensor unit are used to calculate the position of the magnet in the drilling tool.
  • the measurements in the two sensor units 10 are conducted at the same time and, as the distance between the sensor units is known, the position of the magnet can be calculated.
  • the drilling direction of the drilling head 14 can be adjusted so that the direction is the intended direction or so that the distance to a second borehole is the same as the predetermined distance, meaning that the first and second boreholes thus become parallel again.
  • the sensing tool may comprise even more sensing units. Having three or even four sensor units instead of only the two mentioned above will increase the accuracy of the calculated position as well as the direction of the magnetic source and thus the drilling tool. The method described above still applies when using more than two sensor units.
  • the magnet When having an electromagnet as the magnetic field source, the magnet does not have to rotate in order to produce useful measurements as the electromagnet is instead pulsed.
  • the direction of the magnetic field is thus the same relative to the rest of the drill string, simplifying the calculation of the position of the magnet substantially. Even though the electromagnet is rotated, its rotational axis can be coincident with the rotational axis of the drilling tool, thus not affecting the direction of the magnetic field.
  • the sensing tool 8 comprises a driving unit 11 for driving the tool in the longitudinal direction of the second borehole 9.
  • the sensing tool 8 may comprise means 12 for adjusting the position of the sensing tool, enabling the sensing tool to move back and forth in the borehole to be within the desired range of the drilling tool.
  • the desired range is the range within which the sensing tool 8 has a distance to the magnet of the drilling tool 2, enabling measurements of good enough quality to accurately and precisely calculate the position of the drilling tool in relation to the sensing tool.
  • the drilling tool 2 may also comprise a driving tool if the drilling process is not performed by means of coiled tubing or drill pipes.
  • the first borehole 3 is the borehole to be drilled
  • the second borehole 9 is an existing borehole, but the second borehole may also be a well or another kind of hole in the formation.
  • the second borehole 9 may be a vertical part of a well which the drilling tool drilling the first borehole deliberately is to collide with or deliberately is to avoid while drilling.
  • the drilling tool 2 typically runs on a high-pressurized fluid.
  • the magnetic field source 5 has a through hole 13, allowing the fluid to pass through the magnetic field source 5 without losing energy. This is especially convenient when the drilling tool 2 is driven by pressurised fluid through drill pipes or coiled tubing.
  • the ranging system 1 comprises a calculation unit 15 for processing magnitude and direction measurements of the magnetic field 6 measured by the sensor unit 10. The calculation unit 15 is placed in the sensor unit 10.
  • the position, r, of the magnet relative to the sensor is calculated as the solution to a minimisation problem.
  • the expression for the field, B, of a magnetic dipole in vector notation is: where ⁇ is the permeability, d is the dipole vector being substantially coincident with the magnetic field source axis 7, r is the position vector, and r is the distance, i.e. the length of the position vector. This can be rearranged into:
  • the dipole vector can be calculated directly by insertion into the equation for d.
  • the method using the ranging system comprises the steps of: - drilling the first borehole in one drilling direction,
  • the steps of measuring and calculating are performed simultaneously with drilling the first borehole, meaning that the steps of measuring and calculating are performed at least once an hour, preferably at least once every 0.5 hours, more preferably at least once every 10 minutes. It is also possible to do this more often, such as several times per second.
  • either the drilling tool 2 or the sensing tool 8 may also have a positioning tool.
  • fluid or well fluid any kind of fluid which may be present in oil or gas wells downhole, such as natural gas, oil, oil mud, crude oil, water, etc.
  • gas is meant any kind of gas composition present in a well, completion, or open hole
  • oil is meant any kind of oil composition, such as crude oil, an oil-containing fluid, etc.
  • Gas, oil, and water fluids may thus all comprise other elements or substances than gas, oil, and/or water, respectively.
  • a casing any kind of pipe, tubing, tubular, liner, string, etc. used downhole in relation to oil or natural gas production.
  • a downhole tractor can be used to push the tools all the way into position in the well.
  • a downhole tractor is any kind of driving tool capable of pushing or pulling tools in a well downhole, such as a Well Tractor®.

Landscapes

  • Physics & Mathematics (AREA)
  • Mining & Mineral Resources (AREA)
  • Geology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Fluid Mechanics (AREA)
  • Environmental & Geological Engineering (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geophysics (AREA)
  • Electromagnetism (AREA)
  • Geophysics And Detection Of Objects (AREA)
  • Excavating Of Shafts Or Tunnels (AREA)
  • Processing Of Stones Or Stones Resemblance Materials (AREA)
  • Drilling And Boring (AREA)

Abstract

L'invention concerne un système de télémétrie (1) pour contrôler un processus de forage dans un trou de forage, qui a une direction longitudinale et comprend un outil de forage (2) pour forer un premier trou de forage (3); ledit outil a un axe d'outil (4) et comprend une source de champ magnétique (5) sous la forme d'un électro-aimant qui génère un champ magnétique (6) et a un axe de source de champ magnétique (7) sensiblement parallèle à l'axe d'outil. De plus, le système de télémétrie comprend un outil de détection (8) disposé dans un second trou de forage (9) pour mesurer le champ magnétique par le biais d'au moins deux unités de capteur (10), ces unités séparées par une distance (D) le long d'un axe de l'outil de détection.
PCT/EP2010/066443 2009-10-30 2010-10-29 Système de télémétrie magnétique pour contrôler un processus de forage WO2011051431A1 (fr)

Priority Applications (7)

Application Number Priority Date Filing Date Title
US13/500,085 US20120193144A1 (en) 2009-10-30 2010-10-29 Magnetic ranging system for controlling a drilling process
CN2010800490265A CN102782250A (zh) 2009-10-30 2010-10-29 用于控制钻进过程的磁测距系统
MX2012004930A MX2012004930A (es) 2009-10-30 2010-10-29 Sistema de determinacion de distancias para controlar un proceso de perforacion.
EP10773066A EP2494148A1 (fr) 2009-10-30 2010-10-29 Système de télémétrie magnétique pour contrôler un processus de forage
CA2774292A CA2774292A1 (fr) 2009-10-30 2010-10-29 Systeme de telemetrie magnetique pour controler un processus de forage
AU2010311357A AU2010311357A1 (en) 2009-10-30 2010-10-29 Magnetic ranging system for controlling a drilling process
BR112012009224A BR112012009224A2 (pt) 2009-10-30 2010-10-29 sistema variante

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP09174667A EP2317069A1 (fr) 2009-10-30 2009-10-30 Système de télémetrie par magnétisme pour contrôler un procès de forage
EP09174667.7 2009-10-30

Publications (1)

Publication Number Publication Date
WO2011051431A1 true WO2011051431A1 (fr) 2011-05-05

Family

ID=41820332

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2010/066443 WO2011051431A1 (fr) 2009-10-30 2010-10-29 Système de télémétrie magnétique pour contrôler un processus de forage

Country Status (8)

Country Link
US (1) US20120193144A1 (fr)
EP (2) EP2317069A1 (fr)
CN (1) CN102782250A (fr)
AU (1) AU2010311357A1 (fr)
BR (1) BR112012009224A2 (fr)
CA (1) CA2774292A1 (fr)
MX (1) MX2012004930A (fr)
WO (1) WO2011051431A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103573248A (zh) * 2012-07-25 2014-02-12 中国石油化工股份有限公司 钻井的磁干扰测量装置

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014044628A1 (fr) * 2012-09-18 2014-03-27 Shell Internationale Research Maatschappij B.V. Procédé d'orientation d'un second trou de forage par rapport à un premier trou de forage
AU2013355147B2 (en) 2012-12-07 2017-01-05 Halliburton Energy Services, Inc. Surface excitation ranging system for sagd application
AU2012397234B2 (en) * 2012-12-21 2016-05-19 Halliburton Energy Services, Inc. Systems and methods for performing ranging measurements using third well referencing
CN104343438B (zh) * 2014-09-10 2018-07-31 北京纳特斯拉科技有限公司 测量钻井相对距离的旋转磁场测距仪及其测量方法
SG11201701017RA (en) * 2014-09-11 2017-03-30 Halliburton Energy Services Inc Rare earth alloys as borehole markers
CA2969321C (fr) 2014-12-31 2020-09-08 Halliburton Energy Services, Inc. Procedes et systemes employant des capteurs a fibres optiques pour telemetrie
CN108166972A (zh) * 2017-12-22 2018-06-15 西安石油大学 一种控制平行井钻进的磁测距系统及方法
CN107989601B (zh) * 2017-12-22 2020-12-15 西安石油大学 一种用于同时钻多口垂直井的磁测距方法
EP3725998A1 (fr) * 2019-04-18 2020-10-21 Sandvik Mining and Construction Oy Appareil et procédé pour déterminer la position d'un outil de forage pendant le forage
US11781421B2 (en) 2020-09-22 2023-10-10 Gunnar LLLP Method and apparatus for magnetic ranging while drilling
CN115949388B (zh) * 2023-02-20 2024-05-07 四川轻化工大学 一种套管防碰测距预警方法及测量单元

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4933640A (en) * 1988-12-30 1990-06-12 Vector Magnetics Apparatus for locating an elongated conductive body by electromagnetic measurement while drilling
US5589775A (en) * 1993-11-22 1996-12-31 Vector Magnetics, Inc. Rotating magnet for distance and direction measurements from a first borehole to a second borehole
US20080018334A1 (en) * 2005-01-18 2008-01-24 Baker Hughes Incorporated Method and Apparatus for Well-bore Proximity Measurement While Drilling
US20080041626A1 (en) 2006-08-16 2008-02-21 Schlumberger Technology Corporation Magnetic ranging while drilling parallel wells
US20080275648A1 (en) * 2007-05-03 2008-11-06 Pathfinder Energy Services, Inc. Method of optimizing a well path during drilling
US20090260878A1 (en) * 2008-04-17 2009-10-22 Schlumberger Technology Corporation Method for drilling wells in close relationship using magnetic ranging while drilling
US20090260879A1 (en) * 2008-04-18 2009-10-22 Schlumberger Technology Corporation Magnetic ranging while drilling using an electric dipole source and a magnetic field sensor
WO2010008634A1 (fr) * 2008-06-25 2010-01-21 Schlumberger Canada Limited Système et procédé d’emploi de régions alternées de cuvelage magnétique et non magnétique dans des applications de télémétrie magnétique

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7475741B2 (en) * 2004-11-30 2009-01-13 General Electric Company Method and system for precise drilling guidance of twin wells
US7568532B2 (en) * 2006-06-05 2009-08-04 Halliburton Energy Services, Inc. Electromagnetically determining the relative location of a drill bit using a solenoid source installed on a steel casing
US8063641B2 (en) * 2008-06-13 2011-11-22 Schlumberger Technology Corporation Magnetic ranging and controlled earth borehole drilling
CN101806210B (zh) * 2010-04-13 2014-01-01 中国石油大学(北京) 一种螺线管组随钻电磁测距导向系统
CN101852078B (zh) * 2010-06-08 2013-01-16 中国石油大学(北京) 一种双螺线管组随钻电磁测距导向系统

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4933640A (en) * 1988-12-30 1990-06-12 Vector Magnetics Apparatus for locating an elongated conductive body by electromagnetic measurement while drilling
US5589775A (en) * 1993-11-22 1996-12-31 Vector Magnetics, Inc. Rotating magnet for distance and direction measurements from a first borehole to a second borehole
US20080018334A1 (en) * 2005-01-18 2008-01-24 Baker Hughes Incorporated Method and Apparatus for Well-bore Proximity Measurement While Drilling
US20080041626A1 (en) 2006-08-16 2008-02-21 Schlumberger Technology Corporation Magnetic ranging while drilling parallel wells
US20080275648A1 (en) * 2007-05-03 2008-11-06 Pathfinder Energy Services, Inc. Method of optimizing a well path during drilling
US20090260878A1 (en) * 2008-04-17 2009-10-22 Schlumberger Technology Corporation Method for drilling wells in close relationship using magnetic ranging while drilling
US20090260879A1 (en) * 2008-04-18 2009-10-22 Schlumberger Technology Corporation Magnetic ranging while drilling using an electric dipole source and a magnetic field sensor
WO2010008634A1 (fr) * 2008-06-25 2010-01-21 Schlumberger Canada Limited Système et procédé d’emploi de régions alternées de cuvelage magnétique et non magnétique dans des applications de télémétrie magnétique

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103573248A (zh) * 2012-07-25 2014-02-12 中国石油化工股份有限公司 钻井的磁干扰测量装置

Also Published As

Publication number Publication date
EP2317069A1 (fr) 2011-05-04
CN102782250A (zh) 2012-11-14
BR112012009224A2 (pt) 2016-08-23
US20120193144A1 (en) 2012-08-02
CA2774292A1 (fr) 2011-05-05
EP2494148A1 (fr) 2012-09-05
MX2012004930A (es) 2012-05-22
AU2010311357A1 (en) 2012-04-12

Similar Documents

Publication Publication Date Title
EP2494148A1 (fr) Système de télémétrie magnétique pour contrôler un processus de forage
EP3377728B1 (fr) Procédés de forage de puits parallèles multiples avec télémétrie magnétique passive
CA2954723C (fr) Appareil, systemes et procedes de telemetrie de puits
CA2729203C (fr) Systeme et procede d'emploi de regions alternees de cuvelage magnetique et non magnetique dans des applications de telemetrie magnetique
AU2013338324B2 (en) Passive magnetic ranging for SAGD and relief wells via a linearized trailing window Kalman filter
CN111448363B (zh) 用于在井下操作中检测井下元件的相对位置的方法和系统
WO2009151835A1 (fr) Mesure magnétique et forage contrôlé de trou de forage creusé dans la terre
GB2552422A (en) Method and device for depth positioning downhole tool and associated measurement log of a hydrocarbon well
WO2016057241A1 (fr) Appareil, procédés et systèmes de télémétrie de puits
CA3017733C (fr) Mesures multipoints pour telemetrie de puits de forage
US11828166B2 (en) Active magnetic ranging by wellhead current injection
US10837273B2 (en) Surface coil for wellbore positioning

Legal Events

Date Code Title Description
WWE Wipo information: entry into national phase

Ref document number: 201080049026.5

Country of ref document: CN

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

Ref document number: 10773066

Country of ref document: EP

Kind code of ref document: A1

DPE1 Request for preliminary examination filed after expiration of 19th month from priority date (pct application filed from 20040101)
WWE Wipo information: entry into national phase

Ref document number: 2010311357

Country of ref document: AU

WWE Wipo information: entry into national phase

Ref document number: 2774292

Country of ref document: CA

WWE Wipo information: entry into national phase

Ref document number: 13500085

Country of ref document: US

ENP Entry into the national phase

Ref document number: 2010311357

Country of ref document: AU

Date of ref document: 20101029

Kind code of ref document: A

WWE Wipo information: entry into national phase

Ref document number: MX/A/2012/004930

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: 2010773066

Country of ref document: EP

WWE Wipo information: entry into national phase

Ref document number: 4671/CHENP/2012

Country of ref document: IN

REG Reference to national code

Ref country code: BR

Ref legal event code: B01A

Ref document number: 112012009224

Country of ref document: BR

ENP Entry into the national phase

Ref document number: 112012009224

Country of ref document: BR

Kind code of ref document: A2

Effective date: 20120419