[go: up one dir, main page]

EP0298537A2 - Vorrichtung und Verfahren zur Herstellung einer Hinterschneidung in einem Bohrloch - Google Patents

Vorrichtung und Verfahren zur Herstellung einer Hinterschneidung in einem Bohrloch Download PDF

Info

Publication number
EP0298537A2
EP0298537A2 EP88201228A EP88201228A EP0298537A2 EP 0298537 A2 EP0298537 A2 EP 0298537A2 EP 88201228 A EP88201228 A EP 88201228A EP 88201228 A EP88201228 A EP 88201228A EP 0298537 A2 EP0298537 A2 EP 0298537A2
Authority
EP
European Patent Office
Prior art keywords
borehole
motor
underreamer
clapper body
clapper
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.)
Granted
Application number
EP88201228A
Other languages
English (en)
French (fr)
Other versions
EP0298537B1 (de
EP0298537A3 (en
Inventor
Djurre Hans Zijsling
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shell Internationale Research Maatschappij BV
Original Assignee
Shell Internationale Research Maatschappij BV
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 Shell Internationale Research Maatschappij BV filed Critical Shell Internationale Research Maatschappij BV
Publication of EP0298537A2 publication Critical patent/EP0298537A2/de
Publication of EP0298537A3 publication Critical patent/EP0298537A3/en
Application granted granted Critical
Publication of EP0298537B1 publication Critical patent/EP0298537B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

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
    • E21B10/00—Drill bits
    • E21B10/26—Drill bits with leading portion, i.e. drill bits with a pilot cutter; Drill bits for enlarging the borehole, e.g. reamers
    • E21B10/32—Drill bits with leading portion, i.e. drill bits with a pilot cutter; Drill bits for enlarging the borehole, e.g. reamers with expansible cutting tools
    • 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
    • E21B10/00—Drill bits
    • E21B10/46—Drill bits characterised by wear resisting parts, e.g. diamond inserts
    • 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
    • E21B10/00—Drill bits
    • E21B10/60—Drill bits characterised by conduits or nozzles for drilling fluids
    • 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
    • E21B4/00—Drives for drilling, used in the borehole
    • E21B4/18—Anchoring or feeding in the borehole
    • 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
    • E21B44/00—Automatic control systems specially adapted for drilling operations, i.e. self-operating systems which function to carry out or modify a drilling operation without intervention of a human operator, e.g. computer-controlled drilling systems; Systems specially adapted for monitoring a plurality of drilling variables or conditions
    • E21B44/005—Below-ground automatic control systems
    • 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
    • E21B7/28—Enlarging drilled holes, e.g. by counterboring

Definitions

  • the invention relates to a device and a method for underreaming a borehole penetrating through subsurface earth formations.
  • Borehole underreamers are used to increase the diameter of a borehole, for example prior to setting a casing inside the borehole or to install a gravel packing in the production zone of an oil production well.
  • Currently known underreamer devices generally comprise cutters mounted on arms which can be hinged to an expanded position whereupon the device is rotated while moving it in axial direction through the borehole so as to underream the borehole to an enlarged diameter.
  • a disadvantage of the known underreamer devices is that only a limited diameter increase of the borehole can be accomplished and that they can easily get stuck in the borehole during operation and retrieval.
  • the underreamer device comprises a downhole motor having a rotor part which can be rotated relative to a stator part.
  • the rotor part carries by means of a privot means a clapper body, in which a series of abrasive teeth are embedded, which teeth are in use induced to penetrate into the surrounding side-wall of the borehole when the clapper body is induced by centrifugal force to describe an orbital motion inside the borehole.
  • a method of underreaming a borehole comprises the steps of - lowering into a borehole a borehole underreamer device comprising a downhole motor having a rotor part which carries by means of a pivot means a clapper body in which a series of abrassive teeth are embedded, and - pulling the underreamer device in upward direction through the borehole while rotating said rotor part relative to a stator part of the motor, thereby inducing the clapper body to describe an orbital motion inside the borehole and causing the teeth to penetrate into the boreholewall.
  • the underreamer device comprises a hydraulic motor of the Moineau type, which is in use suspended from a pipe string through which drilling fluid is injected.
  • the speed of pulling the device through the borehole during underreaming operations may be adjusted in response to variations in the fluid pressure of the injected drirring fluid as there is a clear relation between the hole size and the power consumption of the rotating clapper at a given rotary speed.
  • FIG. 1 there is shown an underreamer device comprising a clapper body 1 which is carried via a universal joint 2 by an output shaft 3 of a hydraulically driven downhole motor.
  • the motor comprises a housing 4 which is stabilized in a borehole 5 by stabilizer blades 6.
  • the motor housing 4 is connected at the upper end thereof to a pipe string (not shown) which carries the underreamer device and through which a driving fluid is pumped into the motor housing 4 thereby inducing a rotor mounted inside the housing to rotate the output shaft 3 and clapper body 1.
  • the output shaft 3, universal joint 2 and clapper body 1 comprise an axial fluid passage (not shown) and the driving fluid is discharged from the housing via said fluid passage and a series of nozzles 7 into the borehole so as to cool the abrasive teeth 8 mounted the clapper body and to remove drill cuttings therefrom.
  • the output shaft 3 of the motor When after lowering the underreamer device into a pilot hole 9 the output shaft 3 of the motor is rotated the clapper body 1 starts orbiting in the pilot hole. This orbiting motion generates a centrifugal force as a result of which the teeth 8 penetrate the side wall 10 of the pilot hole 9 in lateral direction.
  • the teeth 8 are distributed circumpherentially on a frustoconical section 11 of the clapper body 1.
  • Said frustoconical section 11 is located between a hard faced noze section 12 and a tubular section 13 of the clapper which latter sections serve to ensure that during operations the clapper 1 is oriented at a selected angle ⁇ relative to a central axis I of the borehole 9 and to avoid that the borehole would be underreamed to an undesired large extend.
  • the underreaming process can be monitored at the surface by measuring the pressure of the driving fluid which is injected via a standpipe into the pipestring carrying the underreamer device.
  • the measured standpipe pressure can be used to control the speed of pulling the underreamer device through the borehole during operation thereof.
  • the universal joint 2 may comprise a fluid passage which restricts the amount of fluid flow into the clapper body 1 with a progressing tilt angle ⁇ .
  • standpipe pressure changes generated as a result of the varying flow restriction in the universal joint may be used as a means for controlling the pulling speed of the device through the borehole during underreaming operations.
  • the universal joint 2 may be provided with a by-pass valve (not shown) having a fluid passage which is controlled by the tilt angle ⁇ of the clapper body 1.
  • the pipe string and motor housing 4 may be rotated or be kept non-rotating and that if the device is lowered into or retrieved from the pilot hole 9 the whole assembly is kept non-rotating so as to ensure that the clapper body 1 is kept in a longitudinal orientation in the pilot hole.
  • FIGs. 2 and 3 there is shown the lower part of an underreamer device provided with hingeable stabilizer blades 20 which can be expanded so as to centralize the underreamer device in boreholes of various widths.
  • a device of this type is able to make more passes to ream the hole to the ultimate diameter.
  • Fig. 2 the device is shown in a small diameter pilot hole 21 with the stabilizer blades 20 in the contracted position, whereas in Fig. 3 the device is shown in a widened hole 22 in which the stabilizer blades 20 are located in an expanded thereof.
  • the underreamer device comprises a motor housing 23 which carries near the lower end thereof the stabilizer blades 20.
  • the motor comprises a hollow output shaft 25 which carries a clapper body 26 via a universal joint 27.
  • the motor is a hydraulic motor, such as a Moineau motor which is driven by a driving fluid which is injected into the motor via a pipe string (not shown) which is connected to the upper end of the motor housing 23.
  • the driving fluid is discharged (see arrows II) from the motor housing 23 into the hollow output shaft 25 via orifices 28 at the upper end of said shaft 25.
  • the driving fluid subsequently flows via the interior of the output shaft 25, universal joint 27 and clapper body towards a series of nozzles 29 which are circumpherentially distributed on a frustoconical section 30 of the clapper body 26.
  • annular piston 31 which is slidably arranged in an annular-shaped piston housing 32.
  • the piston housing 32 is coupled in fluid communication with the interior 34 of the motor housing 23 via an axial fluid passage 33. In this manner the pressure of the driving fluid inside the motor housing 34 exerts a downward force to the piston 31 thereby inducing a smoothly curved noze section 36 of the piston to push away in lateral direction inwardly curved lower portions 37 of the stabilizer blades 20, thereby forcing the stabilizer blades 20 towards an expanded position thereof.
  • the piston 31 may be forced back into the retracted position by spring means (not shown) if no driving fluid is pumped through the motor so as to enable axial movement of the device through the borehole during insertion and retrieval while the stabilizer blades are kept in a retracted position.
  • the clapper body 26 of the device shown in Figs. 2 and 3 is provided with hard faced cylindrical section 39 located above the frustoconical section 30 in which the abrassive teeth 40 are inserted.
  • the cylindrical section 39 serves to limit the hole diameter increase per pass.
  • the final borehole diameter is limited by the arrangement of a smooth hard faced noze section 41 at the lower end of the clapper body 26.
  • the underreamer device according to the invention may be used for any conventional underreaming operation such as for underreaming of boreholes, for example prior to setting a casing or prior to setting a gravel packing.
  • the underreamer device according to the invention is furthermore particularly suitable for scaling out of at least partly plugged production liners.
  • the smooth nose section of the clapper body prevents damage to the liner itself and the underreamer is able to operate properly in liner sections with various degrees of scaling.
  • the frustoconical section may be shaped such that the top of a mathe­matical cone enveloping the frustoconical section is located in the pivot centre of the universal joint.
  • the teeth may also be embedded in a spherical section of the clapper body. If desired part of the spherical surface of said section may be oriented tangential to a mathematical cone having its top located at the pivot centre of the universal joint. In that case at least some of the teeth have no tangential movement relative to the borehole wall during operation of the device.
  • the abrasive teeth may be made of any wear resistant material such as diamond, tungsten carbide or sintered diamond or boron nitrite particles which are secured to a tungsten carbide substratum.
  • the teeth may further have a triangular, disk, or any other suitable shape.
  • the universal joint which interconnects in the examples shown in the drawings the output shaft of the motor and the clapper body may be replaced by any suitable other type of pivot means, such as a pivot having a single pivot axis or a flexible conduit section.

Landscapes

  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Mining & Mineral Resources (AREA)
  • Physics & Mathematics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Mechanical Engineering (AREA)
  • Earth Drilling (AREA)
EP88201228A 1987-06-25 1988-06-15 Vorrichtung und Verfahren zur Herstellung einer Hinterschneidung in einem Bohrloch Expired - Lifetime EP0298537B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB8714921 1987-06-25
GB878714921A GB8714921D0 (en) 1987-06-25 1987-06-25 Borehole underreamer device

Publications (3)

Publication Number Publication Date
EP0298537A2 true EP0298537A2 (de) 1989-01-11
EP0298537A3 EP0298537A3 (en) 1989-04-12
EP0298537B1 EP0298537B1 (de) 1992-12-02

Family

ID=10619554

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88201228A Expired - Lifetime EP0298537B1 (de) 1987-06-25 1988-06-15 Vorrichtung und Verfahren zur Herstellung einer Hinterschneidung in einem Bohrloch

Country Status (5)

Country Link
EP (1) EP0298537B1 (de)
DE (1) DE3876318T2 (de)
DK (1) DK169483B1 (de)
GB (1) GB8714921D0 (de)
NO (1) NO302587B1 (de)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0517603A1 (de) * 1991-06-06 1992-12-09 Société Française de Stockage Géologique "GEOSTOCK" (Société à responsabilité limitée) Verfahren zum Bohren eines Blindbohrlochs, insbesondere von grossem Druckmesser, und Bohrwerkzeug zur Durchführung des Verfahrens
GB2462306A (en) * 2008-08-01 2010-02-03 Futuretec Ltd Reamer attached to a stator or rotor shaft
US9587442B2 (en) 2014-03-20 2017-03-07 Halliburton Energy Services, Inc. Automated locking joint in a welbore tool string
CN116427853A (zh) * 2023-04-19 2023-07-14 河北省地质矿产勘查开发局第一地质大队(河北省清洁能源应用技术中心) 一种适用于卵砾石地层的钻探扩孔装置及方法
US11753747B2 (en) 2017-07-14 2023-09-12 Saurer Spinning Solutions Gmbh & Co. Kg Process for operating an air-jet spinning device, yarn guide channel and air-jet spinning machine comprising such a yarn guide channel

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NO992514D0 (no) * 1999-05-26 1999-05-26 Faanes Per & Ge Boreanordning for utboring av koniske hull
WO2009108413A1 (en) 2008-02-29 2009-09-03 Exxonmobil Upstream Research Company Systems and methods for regulating flow in a wellbore

Citations (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1485615A (en) * 1920-12-08 1924-03-04 Arthur S Jones Oil-well reamer
US1667155A (en) * 1927-03-18 1928-04-24 Zalmon B Higdon Drilling bit
US2290502A (en) * 1938-12-29 1942-07-21 Dow Chemical Co Apparatus for forming subterranean cavities
GB579871A (en) * 1943-02-16 1946-08-19 Shell Dev Pressure-actuated tubing anchor for wells
US2799475A (en) * 1953-01-08 1957-07-16 Texas Co Reaming apparatus
US2823901A (en) * 1955-11-07 1958-02-18 Kammerer Jr Archer W Expansible rotary drilling tools
US2922627A (en) * 1956-06-07 1960-01-26 Rotary Oil Tool Company Rotary drill bits and cutters
US3196960A (en) * 1963-03-19 1965-07-27 Lamphere Jean K Fluid pressure expansible drill bits
US3203184A (en) * 1963-10-15 1965-08-31 Whittle Fluid pressure motive systems, for borehole drilling
DE1207907B (de) * 1962-09-07 1965-12-30 Servco Co Bohrlochwerkzeug
US3472553A (en) * 1967-05-03 1969-10-14 Bruno H Miller Method of and apparatus for extracting bitumen
DE1484393B1 (de) * 1960-07-26 1969-10-23 Pierre Jean Marie Allard Bohrvorrichtung zum erweitern der sohle eines bohrlochs
US3757877A (en) * 1971-12-30 1973-09-11 Grant Oil Tool Co Large diameter hole opener for earth boring
FR2275633A1 (fr) * 1974-06-19 1976-01-16 Ferodo Sa Tete de forage du genre comportant notamment un outil de forage auquel est associe un moteur propre a assurer l'entrainement en rotation de cet outil de forage
FR2370163A1 (fr) * 1976-11-05 1978-06-02 Johansson Sven Halvor Dispositif pour immobiliser et deplacer une charge dans un trou fore en prenant appui sur la surface laterale de ce dernier
CA1067819A (en) * 1977-10-14 1979-12-11 Harold F. Green Mining and extracting process and apparatus
US4299296A (en) * 1979-07-06 1981-11-10 Smith International, Inc. In-hole motor drill with bit clutch

Patent Citations (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1485615A (en) * 1920-12-08 1924-03-04 Arthur S Jones Oil-well reamer
US1667155A (en) * 1927-03-18 1928-04-24 Zalmon B Higdon Drilling bit
US2290502A (en) * 1938-12-29 1942-07-21 Dow Chemical Co Apparatus for forming subterranean cavities
GB579871A (en) * 1943-02-16 1946-08-19 Shell Dev Pressure-actuated tubing anchor for wells
US2799475A (en) * 1953-01-08 1957-07-16 Texas Co Reaming apparatus
US2823901A (en) * 1955-11-07 1958-02-18 Kammerer Jr Archer W Expansible rotary drilling tools
US2922627A (en) * 1956-06-07 1960-01-26 Rotary Oil Tool Company Rotary drill bits and cutters
DE1484393B1 (de) * 1960-07-26 1969-10-23 Pierre Jean Marie Allard Bohrvorrichtung zum erweitern der sohle eines bohrlochs
DE1207907B (de) * 1962-09-07 1965-12-30 Servco Co Bohrlochwerkzeug
US3196960A (en) * 1963-03-19 1965-07-27 Lamphere Jean K Fluid pressure expansible drill bits
US3203184A (en) * 1963-10-15 1965-08-31 Whittle Fluid pressure motive systems, for borehole drilling
US3472553A (en) * 1967-05-03 1969-10-14 Bruno H Miller Method of and apparatus for extracting bitumen
US3757877A (en) * 1971-12-30 1973-09-11 Grant Oil Tool Co Large diameter hole opener for earth boring
FR2275633A1 (fr) * 1974-06-19 1976-01-16 Ferodo Sa Tete de forage du genre comportant notamment un outil de forage auquel est associe un moteur propre a assurer l'entrainement en rotation de cet outil de forage
FR2370163A1 (fr) * 1976-11-05 1978-06-02 Johansson Sven Halvor Dispositif pour immobiliser et deplacer une charge dans un trou fore en prenant appui sur la surface laterale de ce dernier
CA1067819A (en) * 1977-10-14 1979-12-11 Harold F. Green Mining and extracting process and apparatus
US4299296A (en) * 1979-07-06 1981-11-10 Smith International, Inc. In-hole motor drill with bit clutch

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0517603A1 (de) * 1991-06-06 1992-12-09 Société Française de Stockage Géologique "GEOSTOCK" (Société à responsabilité limitée) Verfahren zum Bohren eines Blindbohrlochs, insbesondere von grossem Druckmesser, und Bohrwerkzeug zur Durchführung des Verfahrens
FR2677402A1 (fr) * 1991-06-06 1992-12-11 Geostock Procede pour forer un puits aveugle notamment de grand diametre et outil de forage pour le mettre en óoeuvre.
GB2462306A (en) * 2008-08-01 2010-02-03 Futuretec Ltd Reamer attached to a stator or rotor shaft
GB2462306B (en) * 2008-08-01 2012-12-26 Deep Casing Tools Ltd Reaming tool
US9587442B2 (en) 2014-03-20 2017-03-07 Halliburton Energy Services, Inc. Automated locking joint in a welbore tool string
US11753747B2 (en) 2017-07-14 2023-09-12 Saurer Spinning Solutions Gmbh & Co. Kg Process for operating an air-jet spinning device, yarn guide channel and air-jet spinning machine comprising such a yarn guide channel
US11753748B2 (en) 2017-07-14 2023-09-12 Saurer Spinning Solutions Gmbh & Co. Kg Process for operating an air-jet spinning device, yarn guide channel and air-jet spinning machine comprising such a yarn guide channel
CN116427853A (zh) * 2023-04-19 2023-07-14 河北省地质矿产勘查开发局第一地质大队(河北省清洁能源应用技术中心) 一种适用于卵砾石地层的钻探扩孔装置及方法
CN116427853B (zh) * 2023-04-19 2024-01-09 河北省地质矿产勘查开发局第一地质大队(河北省清洁能源应用技术中心) 一种适用于卵砾石地层的钻探扩孔装置及方法

Also Published As

Publication number Publication date
DE3876318D1 (de) 1993-01-14
DK347088A (da) 1988-12-26
EP0298537B1 (de) 1992-12-02
DE3876318T2 (de) 1993-04-01
DK347088D0 (da) 1988-06-23
NO302587B1 (no) 1998-03-23
GB8714921D0 (en) 1987-07-29
EP0298537A3 (en) 1989-04-12
NO882798D0 (no) 1988-06-23
NO882798L (no) 1988-12-27
DK169483B1 (da) 1994-11-07

Similar Documents

Publication Publication Date Title
US8201642B2 (en) Drilling assemblies including one of a counter rotating drill bit and a counter rotating reamer, methods of drilling, and methods of forming drilling assemblies
US7506703B2 (en) Drilling and hole enlargement device
US7513318B2 (en) Steerable underreamer/stabilizer assembly and method
US7849927B2 (en) Running bore-lining tubulars
CA2271401C (en) Drilling with casing
CA2668911C (en) Expandable underreamer/stabilizer
US5255741A (en) Process and apparatus for completing a well in an unconsolidated formation
US6070677A (en) Method and apparatus for enhancing production from a wellbore hole
US9574406B2 (en) Wellbore completion system with reaming tool
MX2010010367A (es) Estabilizador y sistema escariador que tiene cuchillas extensibles y placas de soporte y metodo para utilizarlas.
US5253708A (en) Process and apparatus for performing gravel-packed liner completions in unconsolidated formations
WO2012162537A2 (en) Jet arrangement on an expandable downhole tool
AU2013250913B2 (en) Wellbore completion system with reaming tool
US20050126826A1 (en) Directional casing and liner drilling with mud motor
AU682280B2 (en) Device and method for making a slot in an underground formation
JP6920008B2 (ja) 地層を掘削するためのアースボーリング要素及びパーカッション要素を含むハイブリッドビット
EP0298537A2 (de) Vorrichtung und Verfahren zur Herstellung einer Hinterschneidung in einem Bohrloch
GB2408990A (en) Directional casing drilling
US5076365A (en) Down hole oil field clean-out method

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): DE GB NL

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): DE GB NL

17P Request for examination filed

Effective date: 19890822

17Q First examination report despatched

Effective date: 19901012

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): DE GB NL

REF Corresponds to:

Ref document number: 3876318

Country of ref document: DE

Date of ref document: 19930114

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
REG Reference to a national code

Ref country code: GB

Ref legal event code: IF02

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20040527

Year of fee payment: 17

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: NL

Payment date: 20040621

Year of fee payment: 17

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20040727

Year of fee payment: 17

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20050615

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20060101

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20060103

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20050615

NLV4 Nl: lapsed or anulled due to non-payment of the annual fee

Effective date: 20060101