[go: up one dir, main page]

WO2006033599A1 - Procede de fonctionnement d'une installation de puits a jet lors du fractionnement hydraulique d'une formation et dispositif de mise en oeuvre correspondant - Google Patents

Procede de fonctionnement d'une installation de puits a jet lors du fractionnement hydraulique d'une formation et dispositif de mise en oeuvre correspondant Download PDF

Info

Publication number
WO2006033599A1
WO2006033599A1 PCT/RU2005/000357 RU2005000357W WO2006033599A1 WO 2006033599 A1 WO2006033599 A1 WO 2006033599A1 RU 2005000357 W RU2005000357 W RU 2005000357W WO 2006033599 A1 WO2006033599 A1 WO 2006033599A1
Authority
WO
WIPO (PCT)
Prior art keywords
well
ejection device
support
reservoir
section
Prior art date
Application number
PCT/RU2005/000357
Other languages
English (en)
Russian (ru)
Inventor
Zinoviy Dmitrievich Khomynets
Original Assignee
Zinoviy Dmitrievich Khomynets
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 Zinoviy Dmitrievich Khomynets filed Critical Zinoviy Dmitrievich Khomynets
Publication of WO2006033599A1 publication Critical patent/WO2006033599A1/fr

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04F—PUMPING OF FLUID BY DIRECT CONTACT OF ANOTHER FLUID OR BY USING INERTIA OF FLUID TO BE PUMPED; SIPHONS
    • F04F5/00—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow
    • F04F5/54—Installations characterised by use of jet pumps, e.g. combinations of two or more jet pumps of different type
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04F—PUMPING OF FLUID BY DIRECT CONTACT OF ANOTHER FLUID OR BY USING INERTIA OF FLUID TO BE PUMPED; SIPHONS
    • F04F5/00—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow
    • F04F5/44—Component parts, details, or accessories not provided for in, or of interest apart from, groups F04F5/02 - F04F5/42
    • F04F5/46—Arrangements of nozzles
    • F04F5/464—Arrangements of nozzles with inversion of the direction of flow

Definitions

  • the invention relates to the field of pumping technology, mainly to downhole jet installations for oil production from wells.
  • a well-known method of operating a downhole jet installation includes lowering a string of pipes with a jet pump and a packer into a well, followed by pumping a liquid working medium through a jet pump (RU 2129671 Cl).
  • a well jet device is known from the same source, including a jet pump installed in a well on a tubing string and a packer located below the jet pump.
  • the known method of operation and a downhole jet installation allow pumping out various produced media, for example, oil, from a well while intensifying production of a medium from a formation.
  • a method of operating a downhole jet installation which includes descent into a pipe string and installation on a seat in the support of an ejector device on a cable, while at the same time a physical field generator is installed on the cable in the interval of the productive formation of the well, and through the sealing unit provide a pass cable through the passage channel, then the working medium is fed into the nozzle of the ejection device and the medium is pumped out of the sub-packer zone of the well with the creation of the required pressure in the sub-packer zone, when the pressure is created, the well is examined or, if necessary, the formation is impacted with the help of the devices, and after the necessary work is done in the well, the devices together with the ejection device are removed from the pipe string on the cable and an operational jet is installed in the support a pump for carrying out work on the extraction of a medium, for example, oil from a well (RU 2143597 Cl).
  • a medium for example, oil from a well
  • a well-known downhole jet installation known from the same source, comprising a packer, a pipe string with a support in which bypass windows are made and on which an ejection device is installed in the housing, while in the housing : a channel for supplying a working medium to the nozzle of an ejection device, a channel for supplying a medium pumped out of the well and a channel for withdrawing a mixture of media, and in the housing above the channel for supplying a pumped medium, the message th to the last passageway with a seat for mounting the sealing unit and the sealing unit in an axial channel skippable therethrough and a channel for supplying the evacuated cable medium for installation on it in the well below the ejection device of instruments and equipment with the possibility of moving them along the wellbore with a working or non-working jet pump.
  • the known method of operation and the downhole jet installation allow for various technological operations in the well below the installation level of the jet pump, including by
  • the object of the present invention is to expand the functionality of a well installation and increase its productivity by reducing the time it takes to conduct research on the well and drain the formation.
  • This task in terms of the method is solved due to the fact that the method of operating a well jet device during hydraulic fracturing is to install an inlet funnel, a liner, a packer with a central passage channel, a two-section support with overflow windows in the upper section and from the bottom to the top of the pipe axial two-stage passage channel with a seat in each section, and in the upper section of the support it is possible to install an ejection device or a blocking insert, and in the lower section of the support - inserts for registration of reservoir pressure recovery curves, lower this assembly on the pipe string into the well and unpack the packer, then run the logging cable of the complex geophysical instrument, while lowering the complex geophysical instrument, measure the background values of physical fields in the well and the parameters of the well to bind the interval perforations of the reservoir, a complex geo
  • the supply of the working agent to the nozzle of the ejection device is cut off and the wireline cable is removed to the surface together with a complex geophysical instrument and an ejection device.
  • a blocking insert with a passage channel is installed on the seat in the upper section of the support and the bypass windows of the two-section support are closed by the latter. Hydraulic fracturing fluid or a mixture of the latter with an acid solution is pumped into the reservoir through a pipe string and blocking insert.
  • a blocking insert is removed and a complex geophysical instrument with an ejection device movably mounted above it on the wireline is lowered into the well on the logging cable.
  • the ejection device is installed in a two-section support on the seat in the upper section, and registration is performed with a complex geophysical device geophysical fields in the interval of the well from the inlet funnel to the bottom of the well. Raise a complex geophysical device to the inlet funnel and drain the productive formation by supplying a working agent to the nozzle of the ejection device until frac fluid is pumped out with the reaction products and reservoir fluid in a volume equal to at least twice the volume of frac fluid pumped into the reservoir, while periodically recording bottomhole pressure and flow rate of the well, and on the surface take samples of a mixture of evacuated media and working agent.
  • a complex geophysical device is used to register physical fields and the composition of the formation fluid from the inlet funnel to the bottom of the well, then create a deeper depression on the formation and record physical fields and composition of the formation media along the wellbore when lifting the complex geophysical device from face to the inlet funnel. Cut off the supply of the working agent to the nozzle of the ejection device and remove the wireline along with the integrated geophysical device and ejection device to the surface.
  • An insert is installed on the seat in the lower section of the two-section support for recording the reservoir pressure recovery curves with an autonomous pressure gauge and sampler, and an ejection device with a pumped-in fluid supply channel in the upper part is installed in the upper section of the support.
  • the working agent is fed to the nozzle of the ejection device through the annulus, the well is drained, after which the supply of the working agent to the nozzle of the ejection device is stopped and using an autonomous pressure gauge, registration of reservoir pressure recovery curves in the under-packer space of the well is carried out, at the end of which an ejection device and an insert are added sequentially from the well to record the reservoir pressure recovery curve with an autonomous pressure gauge and sampler, and then the routine is put into operation.
  • the downhole jet installation for implementing the method of operation comprises a pipe string on which an inlet funnel, a liner, a packer with a central passage channel and a two-section support with bypass windows in the upper section and an axial two-stage passage are installed from bottom to top a channel with a seat in each section, and on the seat in the upper section of the support it is possible to install an ejection device or a blocking insert, and on the landing at the bottom of the support section there are inserts for recording the reservoir pressure recovery curves with an autonomous pressure gauge and a sampler, while the ejection device is configured to replace the nozzle and / or diffuser, and in the body of the ejection device there are: a channel for supplying the working agent to the nozzle of the ejection device, a channel for supplying a medium pumped out from the well and a channel for withdrawing a mixture of media from the ejection device, and in a housing above a channel for supplying a
  • D 2 is the diameter of the passage channel of the two-section support above the seat of the lower section of the support
  • D 3 is the diameter of the passage of the channel of the two-section support below the seat of the lower section of the support
  • the length L of the blocking insert is greater than its outer diameter DQ
  • the diameter D 4 of the channel for supplying the pumped medium is larger diameter D 5 of the logging cable is not less than 1 mm.
  • the above sequence of actions allows the most efficient use of the equipment of the well installation during work to intensify the influx of oil from the reservoir, while creating conditions that prevent deposition in the well after conducting perforation of clogging particles and other media that lead to a decrease in permeability productive formation, which is achieved by creating depression in the sub-packer zone of the well.
  • the ejection device removes the above particles and media from the reservoir into the pipe string and then to the surface, and a well is examined using a complex geophysical device, and if necessary, it is possible to effect the formation or layers with physical fields, for example, acoustic impact on the reservoir.
  • it is possible to control the magnitude of depression by controlling the rate of pumping of the liquid working medium.
  • the passage sections of the steps of the two-section support in the following ratios: D 2 ⁇ D 1 - 2 mm, and D ⁇ ⁇ D 2 - 4 mm, where Di is the diameter of the passage channel of the two-section support above the seat of the upper section of the support, D 2 - diameter of the passage channel of the two-section support above the seat of the lower section of the support and Dz - diameter of the passage of the channel of the two-section support below the seat of the lower section of the support.
  • the length L of the blocking insert must be greater than its outer diameter Do, and the diameter D 4 of the supply channel of the pumped medium is greater than the diameter Ds of the wireline cable by at least 1 mm.
  • the above set of interdependent parameters and sequence of actions provides a solution to the problem posed in the invention - expanding the functionality of the downhole jet installation and increasing its productivity by reducing the time it takes to conduct research on the well and drain the producing formation.
  • FIG. 1 shows the proposed downhole jet unit with a complex logging tool installed in it.
  • FIG. 2 shows the proposed downhole jet installation with a blocking insert installed therein.
  • FIG. 3 presents the proposed downhole jet installation with a device installed therein for secondary opening of the reservoir and an ejection device.
  • FIG. 4 shows the proposed downhole jet installation with an ejection device and an insert installed therein for recording formation pressure recovery curves.
  • the downhole jet installation comprises a pipe string 1 on which an inlet funnel 2, a liner 3, a packer 4 with a central passage 5 and a two-section support are installed from bottom to top
  • Ejecting the device 12 is configured to replace the nozzle 16 and / or diffuser 17, and in the housing 18 of the ejecting device 12 are made: channel 19 for supplying the working agent to the nozzle 16 of the ejecting device 12, channel 20 for supplying pumped from Vazhiny medium passage 21 and medium mixture retraction of the ejection device 12.
  • the channel 20 for supplying pumped medium is formed in communication with the latter through passage 22 with a seat 23 for installation of sealing assembly or cap 24 for covering the upper part of the channel 20 for supplying pumped medium.
  • the upper part of the plug 24 is made with the possibility of its capture by a fishing tool lowered on the wireline 25 or wire and in the sealing unit 23 an axial channel 33 is made with the possibility of passing through it and the channel 20 for supplying the pumped medium of the wireline 25 or wire for installation on the latter in the well below the ejection device 12 of the integrated geophysical instrument 26 or device 27 for the secondary opening of the reservoir, including a perforator 32 and a gas generator module containing at least two cameras er with powder charges 28 with the ability to move them along the wellbore.
  • the channel 19 for supplying the working agent to the nozzle 16 of the ejecting device 12 is in communication with the bypass windows 7 and through the latter with the space surrounding the pipe string 1, and the channel 21 for withdrawing the mixture of media from the ejecting device 12 is in communication with the internal cavity of the pipe string 1 above the ejecting devices 12.
  • the length L of the blocking insert 13 is greater than its outer diameter Do, and the diameter D 4 of the channel 20 for supplying the pumped medium is greater than the diameter D 5 of the wireline 25 not less than 1 mm.
  • the proposed method of operating a well jet device during hydraulic fracturing is as follows.
  • an inlet funnel 2, a shank 3, a packer 4 with a central passage 5, a two-section support b with bypass windows 7 in the upper section are installed from the bottom to the top of the pipe string 1
  • the integrated geophysical instrument 26 is removed from the well and the device 27 for re-opening the productive formation, including a perforator 32 and a gas generator, is lowered into the well torny module comprising at least two chambers 28 with the powder charge.
  • an ejection device 12 is movably mounted on the logging cable 25 above the device for secondary opening of the productive formation; in which it is possible to install interchangeable nozzles 16 and diffusers 17.
  • the device 27 for the secondary opening of the productive formation is installed against the selected interval of the productive formation 29, and the ejection device 12 is installed in the support 6 on the seat 10 in the upper section 8.
  • the ejecting device 12 is mounted in the support b on the seat 10 of the upper stage 8, and a complex geophysical device 26 during its descent from the inlet funnel 2 to the bottom of the well, the geophysical fields of the well are recorded.
  • the well is drained by supplying a working agent through the annulus of the well to the nozzle 16 of the ejection device 12 for 4-10 hours and, when a stable depression is reached, the well production rate and bottomhole pressure in the zone of the selected interval of the reservoir 29 are measured.
  • the ejection device is operating 12 register physical fields and the composition of the reservoir fluid, while moving the complex geophysical instrument 26 from the bottom to the inlet funnel 2.
  • Stop feeding from the working agent onto the nozzle 16 of the ejection device 12 and the wireline 25 is removed to the surface together with the complex geophysical device 26 and the ejection device 12.
  • a blocking insert 13 with a passage channel is installed on the seat 10 in the upper section 8 of the support 6 and the bypass windows 7 are closed by the latter two-section support 6. Pumped into the reservoir 29 through the pipe string 1 and the blocking insert 13 fracturing fluid or a mixture of the latter with an acid solution. The blocking insert 13 is removed and lowered into the well on the logging cable 25 complex a geophysical device 26 with an ejection device 12 movably mounted above it on the wireline 25.
  • a complex geophysical device 26 is used to register physical fields and the composition of the formation fluid from the inlet funnel 2 to the bottom of the well, then create a deeper depression on the formation 29 and record the physical fields and composition of the formation media along the wellbore when lifting integrated geophysical instrument 26 from the bottom to the inlet funnel 2. Stop the supply of the working agent to the nozzle 16 of the ejection device 12 and remove the wireline 25 along with the complex physics by the entraining device 26 and device 12 to the surface.
  • an ejection device 12 is installed with a channel 20 for supplying a pumped medium drowned by means of a plug 24 in the upper part.
  • the working agent is fed to the nozzle 16 of the ejection device 12 through the annulus and the well is drained.
  • the flow of the working agent to the nozzle 16 of the ejecting device 12 is stopped and the formation pressure recovery curves in the under-packer space of the well are recorded using an autonomous pressure gauge 30, at the end of which the ejecting device 12 and insert 15 are sequentially extracted from the well to record the formation pressure recovery curve with an autonomous gauge 30 sampler 31 and then carry out routine work on putting the well into operation.
  • the present invention can be used in the oil and gas industry for testing and development of wells, as well as in other industries where various media are produced from wells.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
  • Surgical Instruments (AREA)

Abstract

L'invention appartient au domaine des équipements de pompage et concerne notamment des installations de puits à jets destinées à l'extraction du pétrole des puits. Le procédé de fonctionnement d'une installation de puits à jet comprend le fractionnement hydraulique d'une formation et une deuxième ouverture de la couche productrice au moyen de charges de poudre, avec formation dans la zone adjacente aux puits de la couche productrice de fissures verticales, et un ensemble de travaux de drainage du puits, de création d'une dépression et de mesure de la pression dans le puits et d'enregistrement de la composition, l'évacuation par pompage du liquide de fractionnement hydraulique suivie de la mesure et de l'enregistrement de la courbe de rétablissement de la pression dans la formation. On effectue ensuite les travaux réglementaires de mise en exploitation du puits. L'installation comprend une colonne de tubage, un support à deux sections avec des fenêtres de dérivation dans la section supérieure et un canal traversant axial à deux étages, avec un logement dans chaque section; on a prévu de monter dans la section supérieure du support un dispositif d'éjection ou un insert de blocage. Il est ainsi possible d'intensifier les travaux d'exploration, de test et de préparation du puits.
PCT/RU2005/000357 2004-09-14 2005-06-29 Procede de fonctionnement d'une installation de puits a jet lors du fractionnement hydraulique d'une formation et dispositif de mise en oeuvre correspondant WO2006033599A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
RU2004127258 2004-09-14
RU2004127258/06A RU2263236C1 (ru) 2004-09-14 2004-09-14 Способ работы скважинной струйной установки при гидроразрыве пласта и установка для осуществления способа

Publications (1)

Publication Number Publication Date
WO2006033599A1 true WO2006033599A1 (fr) 2006-03-30

Family

ID=35864301

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/RU2005/000357 WO2006033599A1 (fr) 2004-09-14 2005-06-29 Procede de fonctionnement d'une installation de puits a jet lors du fractionnement hydraulique d'une formation et dispositif de mise en oeuvre correspondant

Country Status (2)

Country Link
RU (1) RU2263236C1 (fr)
WO (1) WO2006033599A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101906955A (zh) * 2010-07-30 2010-12-08 中国石油集团川庆钻探工程有限公司井下作业公司 油气井井下跨式封隔逐层压裂酸化工具管柱结构
CN107401403A (zh) * 2017-09-06 2017-11-28 重庆科技学院 页岩气井多级压裂水泥环气密封完整可视评价装置和方法
CN109989723A (zh) * 2017-12-29 2019-07-09 中国石油天然气股份有限公司 爆破丢手多簇射孔联作压裂密封装置

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4293283A (en) * 1977-06-06 1981-10-06 Roeder George K Jet with variable throat areas using a deflector
US4744730A (en) * 1986-03-27 1988-05-17 Roeder George K Downhole jet pump with multiple nozzles axially aligned with venturi for producing fluid from boreholes
RU2129671C1 (ru) * 1998-03-11 1999-04-27 Зиновий Дмитриевич Хоминец Способ работы скважинной струйной установки
RU2143597C1 (ru) * 1998-12-15 1999-12-27 Зиновий Дмитриевич Хоминец Скважинная струйная установка (варианты)

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4293283A (en) * 1977-06-06 1981-10-06 Roeder George K Jet with variable throat areas using a deflector
US4744730A (en) * 1986-03-27 1988-05-17 Roeder George K Downhole jet pump with multiple nozzles axially aligned with venturi for producing fluid from boreholes
RU2129671C1 (ru) * 1998-03-11 1999-04-27 Зиновий Дмитриевич Хоминец Способ работы скважинной струйной установки
RU2143597C1 (ru) * 1998-12-15 1999-12-27 Зиновий Дмитриевич Хоминец Скважинная струйная установка (варианты)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101906955A (zh) * 2010-07-30 2010-12-08 中国石油集团川庆钻探工程有限公司井下作业公司 油气井井下跨式封隔逐层压裂酸化工具管柱结构
CN107401403A (zh) * 2017-09-06 2017-11-28 重庆科技学院 页岩气井多级压裂水泥环气密封完整可视评价装置和方法
CN107401403B (zh) * 2017-09-06 2023-10-10 重庆科技学院 页岩气井多级压裂水泥环气密封完整可视评价装置和方法
CN109989723A (zh) * 2017-12-29 2019-07-09 中国石油天然气股份有限公司 爆破丢手多簇射孔联作压裂密封装置
CN109989723B (zh) * 2017-12-29 2021-11-02 中国石油天然气股份有限公司 爆破丢手多簇射孔联作压裂密封装置

Also Published As

Publication number Publication date
RU2263236C1 (ru) 2005-10-27

Similar Documents

Publication Publication Date Title
RU2341692C1 (ru) Скважинная струйная установка для гидроразрыва пласта и исследования горизонтальных скважин и способ ее работы
US7051816B2 (en) Well jet device for well testing and development and operating method for the well jet device
US8322445B2 (en) Well jet device
RU2188342C1 (ru) Способ работы скважинной струйной установки при испытании и освоении скважин и скважинная струйная установка
RU2310103C1 (ru) Способ работы скважинной струйной установки при гидроразрыве многопластовых залежей углеводородов
RU2345214C2 (ru) Способ освоения, интенсификации нефтегазовых притоков, проведения водоизоляционных работ и устройство для его осуществления
CA2588916C (fr) Procede permettant de faire fonctionner un dispositif de fond de puits a jet lors de la fracturation hydraulique d'une couche
RU2246049C1 (ru) Скважинная установка для работы в горизонтальных скважинах и способ ее работы
US6926080B2 (en) Operation method of an oil well pumping unit for well development and device for performing said operation method
WO2006033599A1 (fr) Procede de fonctionnement d'une installation de puits a jet lors du fractionnement hydraulique d'une formation et dispositif de mise en oeuvre correspondant
CA2456217C (fr) Procede d'exploitation d'une installation a jet de puits de forage lors de travaux de reparation et d'isolation et dispositif associe
RU2334130C1 (ru) Скважинная струйная установка эмпи-угис-(11-20)дш и способ ее работы
RU2404373C1 (ru) Способ работы колтюбинг-эжекторной установки в газлифтной нефтяной скважине
RU2239730C1 (ru) Скважинная струйная установка для каротажа горизонтальных скважин и способ ее работы
RU2189504C1 (ru) Способ работы скважинной насосной установки при освоении скважины и скважинная насосная установка для его осуществления
RU2253760C1 (ru) Насосно-эжекторная импульсная скважинная струйная установка для гидроразрыва пласта
RU2282760C1 (ru) Скважинная струйная установка и способ ее работы
WO2008127147A1 (fr) Installation de pompe à jets
RU2631580C1 (ru) Скважинная струйная установка для селективного испытания пластов
RU2248472C1 (ru) Способ работы скважинной установки при эксплуатации скважин и установка для реализации способа работы
RU2795009C1 (ru) Способ исследования скважин и интенсификации нефтегазовых притоков и струйный насос для его осуществления
RU2263237C1 (ru) Способ работы скважинной струйной установки при эксплуатации газоконденсатных скважин
RU2252339C1 (ru) Скважинная струйная установка для каротажа горизонтальных скважин
RU2253761C1 (ru) Способ работы скважинной струйной установки при каротаже горизонтальных скважин
RU2252338C1 (ru) Способ подготовки к работе скважинной струйной установки для каротажа горизонтальных скважин

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): AE AG AL AM AT AU AZ BA BB BG BR BW BY BZ CA CH CN CO CR CU CZ DE DK DM DZ EC EE EG ES FI GB GD GE GH GM HR HU ID IL IN IS JP KE KG KM KP KR KZ LC LK LR LS LT LU LV MA MD MG MK MN MW MX MZ NA NG NI NO NZ OM PG PH PL PT RO RU SC SD SE SG SK SL SM SY TJ TM TN TR TT TZ UA UG US UZ VC VN YU ZA ZM ZW

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): BW GH GM KE LS MW MZ NA SD SL SZ TZ UG ZM ZW AM AZ BY KG KZ MD RU TJ TM AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LT LU MC NL PL PT RO SE SI SK TR BF BJ CF CG CI CM GA GN GQ GW ML MR NE SN TD TG

121 Ep: the epo has been informed by wipo that ep was designated in this application
DPE1 Request for preliminary examination filed after expiration of 19th month from priority date (pct application filed from 20040101)
NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase