EP2725189A1 - Wireline pump - Google Patents
Wireline pump Download PDFInfo
- Publication number
- EP2725189A1 EP2725189A1 EP12190177.1A EP12190177A EP2725189A1 EP 2725189 A1 EP2725189 A1 EP 2725189A1 EP 12190177 A EP12190177 A EP 12190177A EP 2725189 A1 EP2725189 A1 EP 2725189A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- pumping assembly
- well
- wireline
- plug device
- pump
- 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.)
- Withdrawn
Links
- 238000005086 pumping Methods 0.000 claims abstract description 139
- 239000012530 fluid Substances 0.000 claims abstract description 61
- 230000000977 initiatory effect Effects 0.000 claims abstract description 19
- 238000000034 method Methods 0.000 claims abstract description 13
- 238000007789 sealing Methods 0.000 claims description 45
- 230000006835 compression Effects 0.000 claims description 22
- 238000007906 compression Methods 0.000 claims description 22
- 230000007246 mechanism Effects 0.000 claims description 18
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 15
- 238000004873 anchoring Methods 0.000 claims description 8
- 230000009471 action Effects 0.000 claims description 6
- 230000004913 activation Effects 0.000 claims description 2
- 238000012544 monitoring process Methods 0.000 claims description 2
- 239000003921 oil Substances 0.000 description 12
- 239000007789 gas Substances 0.000 description 8
- 238000013461 design Methods 0.000 description 6
- 238000004891 communication Methods 0.000 description 4
- 229930195733 hydrocarbon Natural products 0.000 description 4
- 150000002430 hydrocarbons Chemical class 0.000 description 4
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 4
- 238000005192 partition Methods 0.000 description 4
- 238000006073 displacement reaction Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000003213 activating effect Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 239000010779 crude oil Substances 0.000 description 2
- 238000005755 formation reaction Methods 0.000 description 2
- 230000002706 hydrostatic effect Effects 0.000 description 2
- 239000003345 natural gas Substances 0.000 description 2
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000011499 joint compound Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000009931 pascalization Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Images
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
- E21B43/12—Methods or apparatus for controlling the flow of the obtained fluid to or in wells
- E21B43/121—Lifting well fluids
- E21B43/128—Adaptation of pump systems with down-hole electric drives
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B17/00—Pumps characterised by combination with, or adaptation to, specific driving engines or motors
- F04B17/03—Pumps characterised by combination with, or adaptation to, specific driving engines or motors driven by electric motors
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B19/00—Machines or pumps having pertinent characteristics not provided for in, or of interest apart from, groups F04B1/00 - F04B17/00
- F04B19/003—Machines or pumps having pertinent characteristics not provided for in, or of interest apart from, groups F04B1/00 - F04B17/00 free-piston type pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B19/00—Machines or pumps having pertinent characteristics not provided for in, or of interest apart from, groups F04B1/00 - F04B17/00
- F04B19/20—Other positive-displacement pumps
- F04B19/22—Other positive-displacement pumps of reciprocating-piston type
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B47/00—Pumps or pumping installations specially adapted for raising fluids from great depths, e.g. well pumps
- F04B47/02—Pumps or pumping installations specially adapted for raising fluids from great depths, e.g. well pumps the driving mechanisms being situated at ground level
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
- F04B53/14—Pistons, piston-rods or piston-rod connections
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
- F04B53/16—Casings; Cylinders; Cylinder liners or heads; Fluid connections
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B9/00—Piston machines or pumps characterised by the driving or driven means to or from their working members
- F04B9/02—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being mechanical
Definitions
- the present invention relates to a wireline pumping assembly for being introduced in a wellbore or a casing and submerged in well fluid. Furthermore, the invention relates to a use of the wireline pumping assembly, a method of initiating a well using a wireline pumping assembly and a method of optimising an initiation operation.
- a tool may be used to lift the well fluid to the upper part of the well.
- Such tools are often referred to as artificial lift tools.
- Sucker rod pumps are widely used to draw oil from underground formations.
- such pumps entail a large construction above ground as well as sucker rods extending all the way down through the well to a sub-surface rod pump provided in the well.
- These types of pumps may be suitable for use in wells requiring continuous pumping over longer periods of time.
- the sucker rod pump concept is inexpedient due to the associated considerable investments.
- sea-based oil fields often situated at great depths, the concept of a sucker rod extending from a force generating installation at the surface to a pumping device downhole is ill-suited.
- a wireline pumping assembly for being introduced in a wellbore or a casing and submerged in well fluid, the wireline pumping assembly extending in a longitudinal direction and being adapted for connection with a wireline, and the wireline pumping assembly comprising a pump section comprising:
- a simple and reliable pumping device which is capable of running using standard wireline and capable of pumping well fluids downhole. Further, as the pumping device is deployable using standard wireline, the amount of equipment needed to deploy the device is substantially reduced compared to known techniques for performing pumping operations downhole.
- the first valve may be a standing valve fixed in relation to the tubular pump housing and the second valve may be a travelling valve movable with the plunger in relation to the tubular pump housing.
- the linear actuator may comprise:
- the linear actuator may comprise a plurality of piston elements slidingly disposed in a plurality of piston housings and operably connected to the stroker shaft.
- the linear actuator may comprise an electric linear motor and a stroker shaft driven by the electric linear motor for connection with the pump rod to provide reciprocation of the plunger,
- the wireline pumping assembly may further comprise a plug device for providing a seal in an annulus between the wireline pumping assembly and the casing, the plug device comprising a base part connected with the tubular pump housing and having a through-going bore, and one or more sealing elements disposed around the base part, extendable from the base part for sealing off the annulus.
- the plug device may further comprise an anchor mechanism for fixating the wireline pumping assembly in the well, the anchor mechanism being slidingly disposed around the base part and comprising a plurality of setting slips extendable from the base part in a substantial radial direction for engagement with the tubing or casing.
- the plug device may further comprise a compression sleeve slidingly disposed around the base part for compressing the one or more sealing elements, and the sealing elements may be adapted to extend from the base part to seal off the annulus when the compression sleeve is displaced in the longitudinal direction towards the one or more sealing elements, thereby applying a compression force to the one or more sealing elements.
- the compression sleeve may be adapted to be displaced by displacement of the anchor mechanism, resulting in a subsequent compression of the sealing elements by the compression sleeve.
- the wireline pumping assembly may further comprise one or more sensors for measuring a differential pressure across the plug device when the plug device is set in a well.
- the wireline pumping assembly may further comprise an anchor section for anchoring the wireline pumping assembly in the well, the anchor section comprising a plurality of hydraulic activatable anchoring elements extendable from the tool body, for engagement with the casing.
- the wireline pumping assembly may further comprise a driving unit for driving the wireline pumping assembly forward in deviated wells.
- the wireline pumping system may comprising a wireline pumping assembly as described above, and a plug device for providing a seal in an annulus between the plug device and the casing, the plug device comprising a base part having a through-going bore adapted to be connected with the tubular pump housing of the pump section, and one or more sealing elements disposed around the base part, extendable from the base part for sealing off the annulus, wherein the wireline pumping assembly being adapted for connection with the plug device downhole following setting of the plug device in the well.
- the present invention relates to a method of initiating a well using a wireline pumping assembly as described above, comprising the steps of:
- the method may further comprise the step of removing the plug device from the well.
- the plunger moves away from the inlet 21 and the first valve 22, resulting in well fluid being sucked in through the inlet 21, past the open first valve 22 and into the first compartment 202 of the pump chamber.
- the first valve is a check-valve only allowing fluid to flow into the pump chamber.
- a subsequent downstroke motion of the plunger wherein the plunger moves towards the inlet 21 and the first valve 22, forces the fluid through the travelling valve 24 of the plunger and into the second compartment 203 of the pump chamber.
- Each of the piston elements 46 divides each of the one or more piston housings into an first chamber 41 and a second chamber 42, and the piston elements are provided with sealing means 49a in order to provide a sealing connection between the inside of the piston housing 47 and the outside of the piston element 46.
- fluid is alternately supplied to the first chamber 41 and the second chamber 42 via the respective fluid channels 43, 44.
- Fig. 4b only the fluid channels in fluid communication with the fist piston housing is shown, however, the other piston housings are provided with a similar arrangement of fluid channels.
- the pump 5 pumps fluid into the first chamber by sucking a corresponding amount of fluid from the second chamber 42, and vice versa.
- the sealing elements 34 are adapted to extend from the base part 31 to seal off the annulus when the compression sleeve is displaced. Displacement of the compression sleeve applies a compression force to the sealing elements 34, whereby the sealing elements are compressed in the longitudinal direction, resulting in the sealing elements buckling outwards.
- the cooperation relationship of the anchor mechanism, the compression sleeve 38 and the sealing elements 34 thus results in the setting slips 331 and the sealing elements 34 being simultaneously extended from the base part 31 to set the plug device.
- the wireline pumping assembly may further comprise an equalisation valve 37, as shown in Fig. 3b .
- the equalisation valve is adapted to control the flow through the bore 32 of the plug device 3.
- the equalisation valve may also be used for equalising a differential pressure created across the plug device when the plug device is set in the well and well fluid is pumped from the lower sealed-off section 66a of the well below the plug to the upper section 66b of the well above the sealing elements, as shown in Figs. 5a and 5b .
- the equalisation valve is provided in the bore 32 of the plug.
- the equalisation valve may also be incorporated in the pumping section (not shown).
- the plug device or other parts of the wireline pumping assembly may comprise a system for measuring the differential pressure, such as one or more sensors 39 for measuring the pressure in the lower and the upper section of the well.
- the differential pressure may, however, also be determined based on other principles known to the skilled person, inter alia based on the force required to drive the plunger in the pump section.
- Figs. 5a and 5b show the wireline pumping assembly being submerged in a well 65 via a wireline 60.
- the plug device is activated, whereby the setting slips 331 engage the casing 61 to fixate the wireline pumping assembly, and the sealing elements 34 are simultaneously extended to provide a circumferential seal sealing off the annulus.
- the well is thus divided into a lower sealed-off section 66a of the well below the set sealing elements and an upper section 66b of the well above the set sealing elements.
- the design of the plug device 3 and the remainder of the wireline pumping assembly 1 as separate and releasably connectable units may allow for the plug device 3 to be arranged in the well downhole permanently or for longer periods of time.
- fluid or well fluid any kind of fluid that 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 downhole tractor can be used to push the assembly all the way into position in the well.
- the downhole tractor may have projectable arms having wheels, wherein the wheels contact the inner surface of the casing for propelling the tractor and the assembly forward in the casing.
- a downhole tractor is any kind of driving tool capable of pushing or pulling tools in a well downhole, such as a Well Tractor®.
- linear actuator may be a Well Stroker®.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Fluid Mechanics (AREA)
- Environmental & Geological Engineering (AREA)
- Physics & Mathematics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Reciprocating Pumps (AREA)
- Details Of Reciprocating Pumps (AREA)
- Operations Research (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Priority Applications (10)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP12190177.1A EP2725189A1 (en) | 2012-10-26 | 2012-10-26 | Wireline pump |
MX2015004445A MX2015004445A (es) | 2012-10-26 | 2013-10-25 | Bomba de linea de acero. |
EP13783058.4A EP2912261A1 (en) | 2012-10-26 | 2013-10-25 | Wireline pump |
US14/437,023 US20150308243A1 (en) | 2012-10-26 | 2013-10-25 | Wireline pump |
BR112015008032A BR112015008032A2 (pt) | 2012-10-26 | 2013-10-25 | bomba de cabo de aço |
PCT/EP2013/072401 WO2014064254A1 (en) | 2012-10-26 | 2013-10-25 | Wireline pump |
RU2015117243A RU2015117243A (ru) | 2012-10-26 | 2013-10-25 | Кабельный насос |
AU2013336649A AU2013336649B2 (en) | 2012-10-26 | 2013-10-25 | Wireline pump |
CN201380052775.7A CN104704196A (zh) | 2012-10-26 | 2013-10-25 | 电缆泵 |
CA2887541A CA2887541A1 (en) | 2012-10-26 | 2013-10-25 | Wireline pump |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP12190177.1A EP2725189A1 (en) | 2012-10-26 | 2012-10-26 | Wireline pump |
Publications (1)
Publication Number | Publication Date |
---|---|
EP2725189A1 true EP2725189A1 (en) | 2014-04-30 |
Family
ID=47216057
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP12190177.1A Withdrawn EP2725189A1 (en) | 2012-10-26 | 2012-10-26 | Wireline pump |
EP13783058.4A Withdrawn EP2912261A1 (en) | 2012-10-26 | 2013-10-25 | Wireline pump |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP13783058.4A Withdrawn EP2912261A1 (en) | 2012-10-26 | 2013-10-25 | Wireline pump |
Country Status (9)
Country | Link |
---|---|
US (1) | US20150308243A1 (pt) |
EP (2) | EP2725189A1 (pt) |
CN (1) | CN104704196A (pt) |
AU (1) | AU2013336649B2 (pt) |
BR (1) | BR112015008032A2 (pt) |
CA (1) | CA2887541A1 (pt) |
MX (1) | MX2015004445A (pt) |
RU (1) | RU2015117243A (pt) |
WO (1) | WO2014064254A1 (pt) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US10260293B2 (en) | 2017-01-18 | 2019-04-16 | General Electric Company | Sensorless manifold assembly with pressure-based reversing fluid circuit |
EP3931445B1 (en) * | 2019-03-01 | 2024-10-02 | PROCEPT BioRobotics Corporation | Pump cartridge and console |
CN117722176A (zh) * | 2023-12-18 | 2024-03-19 | 愿景(天津)能源技术有限公司 | 一种永置分布式光纤下入油气井的工具和工艺 |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1993006369A1 (en) * | 1991-05-29 | 1993-04-01 | Uniflo Oilcorp, Ltd. | Linear electric motor and method of using and constructing same |
US5411381A (en) * | 1994-03-08 | 1995-05-02 | Perrodin; Philip E. | Reciprocating pump |
WO2006063562A1 (de) * | 2004-12-11 | 2006-06-22 | Herwart Dietrich | Pumpenanordnung zur förderung einer flüssigkeit aus einem bohrloch |
GB2442610A (en) * | 2005-04-08 | 2008-04-09 | Weatherford Lamb | Valve with first and second seats |
Family Cites Families (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3510234A (en) * | 1968-04-16 | 1970-05-05 | William C Wolf | Submersible cable pumping unit |
US4352394A (en) * | 1980-08-01 | 1982-10-05 | Trw Inc. | Cable-suspended well pumping systems |
US5094294A (en) * | 1987-03-30 | 1992-03-10 | Otis Engineering Corp. | Well pump assembly and packer |
US7836950B2 (en) * | 1994-10-14 | 2010-11-23 | Weatherford/Lamb, Inc. | Methods and apparatus to convey electrical pumping systems into wellbores to complete oil and gas wells |
US6138765A (en) * | 1998-08-03 | 2000-10-31 | Camco International, Inc. | Packer assembly for use in a submergible pumping system |
US6651740B2 (en) * | 2001-01-22 | 2003-11-25 | Schlumberger Technology Corporation | System for use in a subterranean environment to vent gas for improved production of a desired fluid |
US7396216B2 (en) * | 2002-04-23 | 2008-07-08 | Halliburton Energy Services, Inc. | Submersible pump assembly for removing a production inhibiting fluid from a well and method for use of same |
US8225873B2 (en) * | 2003-02-21 | 2012-07-24 | Davis Raymond C | Oil well pump apparatus |
US7500523B2 (en) * | 2005-04-08 | 2009-03-10 | Weatherford/Lamb, Inc. | Valve for controlling the flow of fluid between an interior region of the valve and an exterior region of the valve |
US7748449B2 (en) * | 2007-02-28 | 2010-07-06 | Baker Hughes Incorporated | Tubingless electrical submersible pump installation |
US7673676B2 (en) * | 2007-04-04 | 2010-03-09 | Schlumberger Technology Corporation | Electric submersible pumping system with gas vent |
AU2008241149B2 (en) * | 2007-04-24 | 2013-07-11 | Welltec A/S | Stroker tool |
WO2008153698A1 (en) * | 2007-05-21 | 2008-12-18 | Kenneth Doyle Oglesby | Hydraulic pump-drive downhole fluids pump with linear driver |
US20150075783A1 (en) * | 2012-04-27 | 2015-03-19 | Kobold Services Inc. | Methods and electrically-actuated apparatus for wellbore operations |
-
2012
- 2012-10-26 EP EP12190177.1A patent/EP2725189A1/en not_active Withdrawn
-
2013
- 2013-10-25 US US14/437,023 patent/US20150308243A1/en not_active Abandoned
- 2013-10-25 AU AU2013336649A patent/AU2013336649B2/en not_active Ceased
- 2013-10-25 RU RU2015117243A patent/RU2015117243A/ru not_active Application Discontinuation
- 2013-10-25 EP EP13783058.4A patent/EP2912261A1/en not_active Withdrawn
- 2013-10-25 CA CA2887541A patent/CA2887541A1/en not_active Abandoned
- 2013-10-25 MX MX2015004445A patent/MX2015004445A/es unknown
- 2013-10-25 WO PCT/EP2013/072401 patent/WO2014064254A1/en active Application Filing
- 2013-10-25 CN CN201380052775.7A patent/CN104704196A/zh active Pending
- 2013-10-25 BR BR112015008032A patent/BR112015008032A2/pt not_active IP Right Cessation
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1993006369A1 (en) * | 1991-05-29 | 1993-04-01 | Uniflo Oilcorp, Ltd. | Linear electric motor and method of using and constructing same |
US5411381A (en) * | 1994-03-08 | 1995-05-02 | Perrodin; Philip E. | Reciprocating pump |
WO2006063562A1 (de) * | 2004-12-11 | 2006-06-22 | Herwart Dietrich | Pumpenanordnung zur förderung einer flüssigkeit aus einem bohrloch |
GB2442610A (en) * | 2005-04-08 | 2008-04-09 | Weatherford Lamb | Valve with first and second seats |
Also Published As
Publication number | Publication date |
---|---|
CN104704196A (zh) | 2015-06-10 |
AU2013336649B2 (en) | 2016-05-26 |
WO2014064254A1 (en) | 2014-05-01 |
US20150308243A1 (en) | 2015-10-29 |
BR112015008032A2 (pt) | 2017-07-04 |
MX2015004445A (es) | 2015-06-24 |
RU2015117243A (ru) | 2016-12-20 |
EP2912261A1 (en) | 2015-09-02 |
AU2013336649A1 (en) | 2015-05-28 |
CA2887541A1 (en) | 2014-05-01 |
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Legal Events
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PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
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17P | Request for examination filed |
Effective date: 20121026 |
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AX | Request for extension of the european patent |
Extension state: BA ME |
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STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
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18D | Application deemed to be withdrawn |
Effective date: 20141031 |