NO317433B1 - Method and apparatus for drilling inside tubes located within each other - Google Patents
Method and apparatus for drilling inside tubes located within each other Download PDFInfo
- Publication number
- NO317433B1 NO317433B1 NO20030149A NO20030149A NO317433B1 NO 317433 B1 NO317433 B1 NO 317433B1 NO 20030149 A NO20030149 A NO 20030149A NO 20030149 A NO20030149 A NO 20030149A NO 317433 B1 NO317433 B1 NO 317433B1
- Authority
- NO
- Norway
- Prior art keywords
- feed
- drill
- drilling
- valve
- drilling device
- Prior art date
Links
- 238000005553 drilling Methods 0.000 title claims abstract description 47
- 238000000034 method Methods 0.000 title claims abstract description 15
- 239000012530 fluid Substances 0.000 claims abstract description 22
- 239000000463 material Substances 0.000 claims abstract description 13
- 230000004941 influx Effects 0.000 claims abstract 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims 1
- 230000001105 regulatory effect Effects 0.000 abstract description 3
- 230000008878 coupling Effects 0.000 description 9
- 238000010168 coupling process Methods 0.000 description 9
- 238000005859 coupling reaction Methods 0.000 description 9
- IHPYMWDTONKSCO-UHFFFAOYSA-N 2,2'-piperazine-1,4-diylbisethanesulfonic acid Chemical compound OS(=O)(=O)CCN1CCN(CCS(O)(=O)=O)CC1 IHPYMWDTONKSCO-UHFFFAOYSA-N 0.000 description 1
- 239000007990 PIPES buffer Substances 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
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
- E21B29/00—Cutting or destroying pipes, packers, plugs or wire lines, located in boreholes or wells, e.g. cutting of damaged pipes, of windows; Deforming of pipes in boreholes or wells; Reconditioning of well casings while in the ground
- E21B29/002—Cutting, e.g. milling, a pipe with a cutter rotating along the circumference of the pipe
-
- 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
- E21B44/02—Automatic control of the tool feed
- E21B44/04—Automatic control of the tool feed in response to the torque of the drive ; Measuring drilling torque
Landscapes
- Geology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- Physics & Mathematics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Earth Drilling (AREA)
- Drilling And Boring (AREA)
- Processing Of Stones Or Stones Resemblance Materials (AREA)
- Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
- Punching Or Piercing (AREA)
Abstract
Description
FREMGANGSMÅTE OG ANORDNING FOR BORING I INNE I HVERANDRE SEG BEFINNENDE RØR PROCEDURE AND DEVICE FOR DRILLING INSIDE PIPES LOCATED EACH OTHER
Denne oppfinnelse vedrører en fremgangsmåte for å bore i inne This invention relates to a method for drilling inside
i hverandre seg befinnende rør. Nærmere bestemt dreier det seg om en fremgangsmåte for å redusere boretiden når det skal bores gjennom minst en rørvegg og det i et ringrom innenfor rørveggen befinner seg et i forhold til rørveggmaterialet lettere borbart materiale eller et fluida Oppfinnelsen omfatter også en anordning for utøvelse av fremgangsmåten. pipes located in each other. More specifically, it concerns a method for reducing the drilling time when drilling is to be done through at least one pipe wall and there is a material or fluid that is easier to drill in relation to the pipe wall material in an annulus within the pipe wall. The invention also includes a device for carrying out the method.
Ved fjerning av for eksempel sammensatte foringsrør for pe-troleumsutvinning, er det etter hvert blitt vanlig å kutte rør ved hjelp av saging. Det er ofte tale om kutting av et rør som innholder ett eller flere innvendige rør. Ringrommene mellom rørene kan være fylt med for eksempel betong. When removing, for example, composite casing pipes for petroleum extraction, it has gradually become common to cut pipes using sawing. It is often a matter of cutting a pipe that contains one or more internal pipes. The annular spaces between the pipes can be filled with, for example, concrete.
Dersom de innvendige rør ikke er tilstrekkelig forbundet til det ytre rør, kan de innvendige rør forskyves aksialt og/eller radialt i forhold til det ytre rør under sageoperasjonen. Forskyvningen kan medføre skade på den sageanordning som anvendes. If the inner tubes are not sufficiently connected to the outer tube, the inner tubes can be displaced axially and/or radially in relation to the outer tube during the sawing operation. The displacement can cause damage to the sawing device used.
Det har således vist seg nødvendig å stemple av de innvendige rør i forhold til det ytre rør før selve sageoperasjonen igangsettes. It has thus proved necessary to stamp off the inner tubes in relation to the outer tube before the actual sawing operation is initiated.
Ifølge kjent teknikk anbringes en eller flere boreanordninger i hovedsak i radial retning på det utvendige rørs mantelfla-te. Boreanordningen kan være hydraulisk drevet både med hen-syn til rotasjon og mating. According to known technology, one or more drilling devices are placed mainly in a radial direction on the outer pipe's jacket surface. The drilling device can be hydraulically driven both with regard to rotation and feeding.
Boreanordningens bor mates med en bestemt hastighet under rotasjon gjennom det utvendige rør, det i det ytre ringrom seg befinnende materiale og eventuelt videre gjennom det innenfor liggende rør, det neste ringrom og så videre til det innerste rør hvor boret kan anvendes for avstempling ved hjelp av matekraften eller til å bore gjennom også det innerste rørs rørvegg. Deretter kan boret anvendes som avstempling eller erstattes med for eksempel en aksling for å stemple av rørene. The drilling device's drill is fed at a specific speed during rotation through the outer tube, the material in the outer annulus and possibly further through the inner tube, the next annulus and so on to the innermost tube where the drill can be used for de-stamping using the feed force or to drill through the pipe wall of the innermost pipe as well. The drill can then be used as stamping or replaced with, for example, a shaft to stamp off the pipes.
Grunnet den relativt store avstand fra boreanordningens be-tjeningsventiler og til borestedet, er det nødvendig å anbringe den strupe- eller konstantventil som anvendes for å stille inn boreanordningens matehastiget nær boreanordningen for å overvinne trykkfluidledningers fleksibilitet. Denne ventil er bare i begrenset grad tilgjengelig under boreopera-sjonen, fordi det kan være farlig for personell å oppholde seg ved boreanordningen når den er i drift. Due to the relatively large distance from the drilling device's operating valves and to the drilling site, it is necessary to place the throttle or constant valve used to set the drilling device's feed speed close to the drilling device in order to overcome the flexibility of the pressure fluid line. This valve is only accessible to a limited extent during the drilling operation, because it can be dangerous for personnel to stay near the drilling device when it is in operation.
Borearbeidene ifølge kjent teknikk tar unødig lang tid fordi boret går med tilnærmet konstant matehastighet under hele bo-reoperas j onen. The drilling work according to known techniques takes an unnecessarily long time because the drill runs at an almost constant feed rate during the entire drilling operation.
Oppfinnelsen har til formål å avhjelpe ulempene ved kjent The purpose of the invention is to remedy the disadvantages of the known
teknikk. technique.
Formålet oppnås i henhold til oppfinnelsen ved de trekk som er angitt i nedenstående beskrivelse og i de etterfølgende patentkrav. The purpose is achieved according to the invention by the features indicated in the description below and in the subsequent patent claims.
Det har vist seg at boret kan mates med en vesentlig større hastighet når det arbeider for eksempel i betong, sammenlig-net med den matehastighet som er hensiktsmessig under boring i rørveggens materiale. It has been shown that the drill can be fed at a significantly greater speed when working, for example, in concrete, compared to the feed speed that is appropriate when drilling in the material of the pipe wall.
Når boret har skåret gjennom den første rørvegg reduseres ro-tas jonsmotstanden i boret, hvorved oljetrykket i hydraulikk-kretsen for borrotasjon reduseres. Ifølge oppfinnelsen åpnes en ventil for ytterligere tilførsel av trykkfluid til boreanordningens matesylindre uten at strupe- eller konstantventi-len som anvendes for å stille inn sageanordningens matehastiget for boring gjennom rørveggmaterialet forstyrres. Boret forskyves således relativt hurtig gjennom betongmaterialet og frem til boret kommer til anslag mot den innenfor seg befinnende rørvegg. Rotasjonsmotstanden for boret øker deretter, og et korresponderende høyere trykk kan avleses i hydraulikk-kretsen for borrotasjon. Den ekstra trykkfluidtilførsel stenges, hvorved boret fortsetter å bore gjennom rørveggmate-rialet med den forutbestemte matehastighet. When the drill has cut through the first pipe wall, the rotation resistance in the drill is reduced, whereby the oil pressure in the hydraulic circuit for drill rotation is reduced. According to the invention, a valve is opened for further supply of pressurized fluid to the drilling device's feed cylinders without disturbing the throttle or constant valve used to set the sawing device's feed speed for drilling through the pipe wall material. The drill is thus moved relatively quickly through the concrete material and until the drill comes to rest against the pipe wall inside it. The rotation resistance of the drill then increases, and a correspondingly higher pressure can be read in the hydraulic circuit for drill rotation. The additional pressure fluid supply is shut off, whereby the drill continues to drill through the pipe wall material at the predetermined feed rate.
Fremgangsmåten gjentas for eventuelle innenforliggende ringrom og rørvegger. The procedure is repeated for any internal annulus and pipe walls.
Boretiden for gjennomboring av rør hvor det befinner seg an-dre innvendige rør kan reduseres vesentlig ved anvendelse av fremgangsmåten ifølge oppfinnelsen. Fremgangsmåten kan bidra til en betydelig kostnadsbesparelse, idet timeratene for ar-beid av denne art inkludert leie av borerigg er relativt høye. The drilling time for drilling through pipes where there are other internal pipes can be significantly reduced by using the method according to the invention. The procedure can contribute to significant cost savings, as the hourly rates for work of this nature, including the hire of a drilling rig, are relatively high.
I det etterfølgende beskrives et ikke-begrensende eksempel på en foretrukket fremgangsmåte og utføreIsesform som er anskue-liggjort på medfølgende tegninger, hvor: Fig. 1 viser i snitt en rørmontasje omfattende rør med to innenforliggende rør hvor det i mellomrommene mellom rørene er fylt betong, og hvor to boreanordninger er montert på rø-ret og er i ferd med å bore åpninger i rørmontasjen; Fig. 2 viser et snitt I-l gjennom boreanordningen i fig. 1; og Fig. 3 viser et forenklet hydraulisk koplingsskjerna for boreanordningen . In what follows, a non-limiting example of a preferred method and embodiment is described, which is visualized in the accompanying drawings, where: Fig. 1 shows in section a pipe assembly comprising pipes with two inner pipes where the spaces between the pipes are filled with concrete, and where two drilling devices are mounted on the pipe and are in the process of drilling openings in the pipe assembly; Fig. 2 shows a section I-1 through the drilling device in fig. 1; and Fig. 3 shows a simplified hydraulic coupling core for the drilling device.
På tegningene betegner henvisningstallet 1 en boreanordning som er forsynt med et bor 2 og som ved hjelp av et festebe-slag 4 er festet til et ytre rør 6. In the drawings, the reference number 1 denotes a drilling device which is equipped with a drill bit 2 and which is attached to an outer pipe 6 by means of a fixing bracket 4.
Innvendig i det ytre rør 6 befinner det seg et mellomrør 8, og innvendig i mellomrøret 8, et indre rør 10. Inside the outer pipe 6 there is an intermediate pipe 8, and inside the intermediate pipe 8, an inner pipe 10.
Rommene mellom rørene 6, 8 og 10 utgjør et ytre ringrom 12 og et indre ringrom 14. Ringrommene 12 og 14 er fylt med betong. The spaces between the pipes 6, 8 and 10 constitute an outer annular space 12 and an inner annular space 14. The annular spaces 12 and 14 are filled with concrete.
Boreanordningen 1 omfatter foruten boret 2 en til boret 2 ved hjelp av en adapter 20 forbundet matespindel 22. Matespinde-len 22 er aksialforskyvbar i boreanordningens 1 hus 24 ved hjelp av to matesylindre 26. Matesylindrene 26 er koplet inn mellom huset 24 og et om matespindelen 22 anbrakt aksiallager 28. To hydrauliske drivmotorer 30 er forbundet til huset 24 og omkranser aksialforskyvbart matespindelen 22. In addition to the drill 2, the drilling device 1 comprises a feed spindle 22 connected to the drill 2 by means of an adapter 20. The feed spindle 22 is axially displaceable in the housing 24 of the drilling device 1 by means of two feed cylinders 26. The feed cylinders 26 are connected between the housing 24 and one around the feed spindle 22 placed axial bearing 28. Two hydraulic drive motors 30 are connected to the housing 24 and surround the feed spindle 22 axially displaceably.
Boreanordningen 1 styres ved hjelp av en rotasjonsventil 40 og en mateventil 42. Ventilene 40 og 42 befinner seg på sik-ker avstand fra boreanordningen 1 og tilføres trykkfluid fra en ikke vist hydraulikkpumpe. Fra rotasjonsventilen 40 forlø-per hydraulikkledninger 44 via hurtigkoplinger 46 til drivmotorene 30. En matehydraulikkledning 48 forbinder mateventilen 42, via en hurtigkopling 50 og en strupeventil 52, til matesylindrenes 26 mateside. Matesylindrenes 26 returside er forbundet til mateventilen 42 ved hjelp av en returhydrau-likkledning 54 og en hurtigkopling 56. The drilling device 1 is controlled by means of a rotary valve 40 and a feed valve 42. The valves 40 and 42 are located at a safe distance from the drilling device 1 and are supplied with pressurized fluid from a hydraulic pump, not shown. From the rotary valve 40, hydraulic lines 44 run via quick couplings 46 to the drive motors 30. A feed hydraulic line 48 connects the feed valve 42, via a quick coupling 50 and a throttle valve 52, to the feeding side of the feed cylinders 26. The return side of the feed cylinders 26 is connected to the feed valve 42 by means of a return hydraulic line 54 and a quick coupling 56.
En hurtigmateventil 58 er koplet til matehydraulikkledningen 48 ved mateventilen 42. Fra hurtigmateventilen 58 forløper en hurtigmatehydraulikkledning 60 via en hurtigkopling 62 til matehydraulikkledningen 48 i området mellom strupeventilen 52 og matesylindrene 26. Hurtigkoplingene 46, 50, 56 og 62 er innrettet til å underlette monteringsarbeidet av boreanordningen 1. A quick feed valve 58 is connected to the feed hydraulic line 48 at the feed valve 42. From the quick feed valve 58, a quick feed hydraulic line 60 runs via a quick coupling 62 to the feed hydraulic line 48 in the area between the throttle valve 52 and the feed cylinders 26. The quick couplings 46, 50, 56 and 62 are designed to facilitate the assembly work of the drilling device 1.
Ønsket matehastighet for boret 2 innstilles ved å regulere strupeventilen 52, fortrinnsvis før borearbeidene startes. The desired feed rate for the drill 2 is set by regulating the throttle valve 52, preferably before the drilling work is started.
Når et hull skal bores, og boreanordningen 1 er festet til det ytre rør 6, startes borets 2 rotasjon ved at rotasjonsventilen 40 stilles i driftsstilling. Trykkfluid strømmer da gjennom rotasjonsventilen 40 og drivmotorene 30 via hydrau-likkledningene 44 og hurtigkoplingene 46. Drivmotorene 30 ro-terer matespindelen 22 og derved boret 2 om sin egen lengde-akse. When a hole is to be drilled, and the drilling device 1 is attached to the outer pipe 6, the rotation of the drill bit 2 is started by placing the rotary valve 40 in the operating position. Pressurized fluid then flows through the rotary valve 40 and the drive motors 30 via the hydraulic cables 44 and the quick couplings 46. The drive motors 30 rotate the feed spindle 22 and thereby the drill 2 about its own longitudinal axis.
Borets 2 mating igangsettes ved at mateventilen 42 stilles i sin matestilling. Trykkfluid strømmer derved fra mateventilen 42 via matehydraulikkledningen 48, hurtigkoplingen 50 og strupeventilen 42 til matesylindrenes mateside, idet matesylindrene forskyver aksiallageret 28 og derved matespindelen 22 og boret 2 i retning inn mot det ytre rør 6. The feeding of the drill bit 2 is initiated by the feeding valve 42 being set in its feeding position. Pressurized fluid thereby flows from the feed valve 42 via the feed hydraulic line 48, the quick coupling 50 and the throttle valve 42 to the feed side of the feed cylinders, as the feed cylinders displace the axial bearing 28 and thereby the feed spindle 22 and the drill 2 in the direction towards the outer tube 6.
Det er nødvendig å anbringe strupeventilen 52 nær matesylindrene 26 fordi matehydrulikkledningens 48 elastisitet el-lers ville kunne bevirke en ujevn matehastighet. It is necessary to place the throttle valve 52 close to the feed cylinders 26 because the elasticity of the feed hydraulic line 48 could otherwise cause an uneven feed rate.
Etter at boret 2 har arbeidet seg gjennom det ytre rørs 6 rørvegg, se boret 2 tilhørende den øvre boreanordning 1 i fig. 1, reduseres det moment som skal til for å rotere boret 2 fordi den betong som befinner seg i det ytre ringrom 12 er lettere å bore enn rørveggen 6. Rotasjonsfluidtrykket som kan avleses på et manometer 64 reduseres tilsvarende. After the drill 2 has worked its way through the pipe wall of the outer pipe 6, see the drill 2 belonging to the upper drilling device 1 in fig. 1, the torque required to rotate the drill 2 is reduced because the concrete located in the outer annulus 12 is easier to drill than the pipe wall 6. The rotational fluid pressure that can be read on a manometer 64 is reduced accordingly.
Ved å åpne hurtigmateventilen 58 strømmer trykkfluid til matesylindrenes 26 mateside gjennom hurtigmatehydraulikk-ledningen 60 og hurtigkoplingen 62 utenom strupeventilen 52. Boret 2 mates derved hurtigere gjennom betongen i det ytre ringrom 12, se boret 2 tilhørende den nedre boreanordning i fig. 1. Når boret 2 har nådd frem til meHornrøret 8, stiger rotasjonsmotstanden i boret 2. Den korresponderende trykkøk-ning kan avleses på manometeret 64. Hurtigmateventilen 58 stenges, hvorved borets 2 matehastighet gjennom mellomrørets 8 rørvegg reduseres til den ved strupeventilen 52 på forhånd innstilte verdi. By opening the quick feed valve 58, pressurized fluid flows to the feed side of the feed cylinders 26 through the quick feed hydraulic line 60 and the quick coupling 62 outside the throttle valve 52. The drill 2 is thereby fed faster through the concrete in the outer annulus 12, see the drill 2 belonging to the lower drilling device in fig. 1. When the drill 2 has reached the meHorn pipe 8, the rotational resistance in the drill 2 rises. The corresponding increase in pressure can be read on the manometer 64. The quick feed valve 58 is closed, whereby the feed rate of the drill 2 through the tube wall of the intermediate pipe 8 is reduced to that set in advance by the throttle valve 52 value.
På tilsvarende måte økes matehastigheten ved boring gjennom det indre ringrom 14 og eventuelt gjennom det indre rørs 10 hulrom. In a similar way, the feed rate is increased when drilling through the inner annulus 14 and possibly through the cavity of the inner tube 10.
Claims (4)
Priority Applications (8)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NO20030149A NO317433B1 (en) | 2003-01-13 | 2003-01-13 | Method and apparatus for drilling inside tubes located within each other |
| BR0406732-0A BRPI0406732A (en) | 2003-01-13 | 2004-01-13 | Method and device for piercing tubular elements located within each other |
| AT04701709T ATE335122T1 (en) | 2003-01-13 | 2004-01-13 | METHOD AND DEVICE FOR DRILLING INTERESTING TUBES |
| US10/541,835 US20060231291A1 (en) | 2003-01-13 | 2004-01-13 | Method and device for drilling into tubulars located within one another |
| DE602004001756T DE602004001756D1 (en) | 2003-01-13 | 2004-01-13 | METHOD AND DEVICE FOR DRILLING MULTIPLE PIPES |
| DK04701709T DK1588021T3 (en) | 2003-01-13 | 2004-01-13 | Method and device for drilling into interposed tubes |
| PCT/NO2004/000005 WO2004063525A1 (en) | 2003-01-13 | 2004-01-13 | A method and device for drilling into tubulars located within one another |
| EP04701709A EP1588021B1 (en) | 2003-01-13 | 2004-01-13 | A method and device for drilling into tubulars located within one another |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NO20030149A NO317433B1 (en) | 2003-01-13 | 2003-01-13 | Method and apparatus for drilling inside tubes located within each other |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| NO20030149D0 NO20030149D0 (en) | 2003-01-13 |
| NO317433B1 true NO317433B1 (en) | 2004-10-25 |
Family
ID=19914372
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NO20030149A NO317433B1 (en) | 2003-01-13 | 2003-01-13 | Method and apparatus for drilling inside tubes located within each other |
Country Status (8)
| Country | Link |
|---|---|
| US (1) | US20060231291A1 (en) |
| EP (1) | EP1588021B1 (en) |
| AT (1) | ATE335122T1 (en) |
| BR (1) | BRPI0406732A (en) |
| DE (1) | DE602004001756D1 (en) |
| DK (1) | DK1588021T3 (en) |
| NO (1) | NO317433B1 (en) |
| WO (1) | WO2004063525A1 (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7946793B2 (en) | 2008-03-28 | 2011-05-24 | Fastorq, Llc | Apparatus for drilling colinear holes through concentric pipes |
| US8869916B2 (en) | 2010-09-09 | 2014-10-28 | National Oilwell Varco, L.P. | Rotary steerable push-the-bit drilling apparatus with self-cleaning fluid filter |
| CA2810266C (en) | 2010-09-09 | 2016-05-03 | National Oilwell Varco, L.P. | Downhole rotary drilling apparatus with formation-interfacing members and control system |
| CN103406939B (en) * | 2013-07-19 | 2016-03-30 | 广东联塑科技实业有限公司 | A kind of PVC leaky pipe producing device |
| US12090538B1 (en) * | 2020-12-09 | 2024-09-17 | Roscoe Moss Manufacturing Company | System, apparatus, and method for quality control inspection |
Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3903697A (en) * | 1974-07-24 | 1975-09-09 | Azcon Corp | Variable speed hydraulic drive |
| US4271914A (en) * | 1976-12-02 | 1981-06-09 | The United States Of America As Represented By The Secretary Of The Interior | Automatic feed and rotational speed control system of a hydraulic motor operated drill |
| US4185652A (en) * | 1977-10-31 | 1980-01-29 | Nl Industries, Inc. | Subaqueous sequence valve mechanism |
| US4226288A (en) * | 1978-05-05 | 1980-10-07 | California Institute Of Technology | Side hole drilling in boreholes |
| US4619556A (en) * | 1983-11-14 | 1986-10-28 | Parra Ernest P | Method and apparatus for severing a tubular member |
| US5392858A (en) * | 1994-04-15 | 1995-02-28 | Penetrators, Inc. | Milling apparatus and method for well casing |
| US5564455A (en) * | 1995-01-06 | 1996-10-15 | The Charles Machine Works, Inc. | Hydraulic circuit for automatic control of a horizontal boring machine |
| US5687806A (en) * | 1996-02-20 | 1997-11-18 | Gas Research Institute | Method and apparatus for drilling with a flexible shaft while using hydraulic assistance |
| US6155343A (en) * | 1996-10-25 | 2000-12-05 | Baker Hughes Incorporated | System for cutting materials in wellbores |
| US6167968B1 (en) * | 1998-05-05 | 2001-01-02 | Penetrators Canada, Inc. | Method and apparatus for radially drilling through well casing and formation |
| DE19924200B4 (en) * | 1999-05-27 | 2004-07-15 | Wolfgang Schmidt E.K. | Speed Feed Control |
-
2003
- 2003-01-13 NO NO20030149A patent/NO317433B1/en not_active IP Right Cessation
-
2004
- 2004-01-13 BR BR0406732-0A patent/BRPI0406732A/en not_active IP Right Cessation
- 2004-01-13 EP EP04701709A patent/EP1588021B1/en not_active Expired - Lifetime
- 2004-01-13 US US10/541,835 patent/US20060231291A1/en not_active Abandoned
- 2004-01-13 WO PCT/NO2004/000005 patent/WO2004063525A1/en active IP Right Grant
- 2004-01-13 DK DK04701709T patent/DK1588021T3/en active
- 2004-01-13 AT AT04701709T patent/ATE335122T1/en not_active IP Right Cessation
- 2004-01-13 DE DE602004001756T patent/DE602004001756D1/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| EP1588021A1 (en) | 2005-10-26 |
| WO2004063525A1 (en) | 2004-07-29 |
| ATE335122T1 (en) | 2006-08-15 |
| DE602004001756D1 (en) | 2006-09-14 |
| DK1588021T3 (en) | 2006-12-04 |
| NO20030149D0 (en) | 2003-01-13 |
| EP1588021B1 (en) | 2006-08-02 |
| BRPI0406732A (en) | 2005-12-20 |
| US20060231291A1 (en) | 2006-10-19 |
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