NO325931B1 - Device and method of flow aid in a pipeline - Google Patents
Device and method of flow aid in a pipeline Download PDFInfo
- Publication number
- NO325931B1 NO325931B1 NO20063269A NO20063269A NO325931B1 NO 325931 B1 NO325931 B1 NO 325931B1 NO 20063269 A NO20063269 A NO 20063269A NO 20063269 A NO20063269 A NO 20063269A NO 325931 B1 NO325931 B1 NO 325931B1
- Authority
- NO
- Norway
- Prior art keywords
- pipeline
- fluid
- seabed
- injection point
- vessel
- Prior art date
Links
- 238000000034 method Methods 0.000 title claims abstract description 10
- 239000012530 fluid Substances 0.000 claims abstract description 53
- 238000002347 injection Methods 0.000 claims abstract description 15
- 239000007924 injection Substances 0.000 claims abstract description 15
- 239000003380 propellant Substances 0.000 claims abstract description 3
- 230000005484 gravity Effects 0.000 claims 1
- 238000005553 drilling Methods 0.000 description 15
- 230000015572 biosynthetic process Effects 0.000 description 3
- 239000007789 gas Substances 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 230000001276 controlling effect Effects 0.000 description 2
- 239000003208 petroleum Substances 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000012216 screening Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D1/00—Pipe-line systems
- F17D1/08—Pipe-line systems for liquids or viscous products
- F17D1/12—Conveying liquids or viscous products by pressure of another fluid
-
- 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
- E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
- E21B21/001—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor specially adapted for underwater drilling
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
- E21B21/12—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor using drilling pipes with plural fluid passages, e.g. closed circulation systems
Landscapes
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Mechanical Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Fluid Mechanics (AREA)
- Environmental & Geological Engineering (AREA)
- Physics & Mathematics (AREA)
- Geochemistry & Mineralogy (AREA)
- Health & Medical Sciences (AREA)
- Public Health (AREA)
- Water Supply & Treatment (AREA)
- General Engineering & Computer Science (AREA)
- Jet Pumps And Other Pumps (AREA)
- Earth Drilling (AREA)
- Air Transport Of Granular Materials (AREA)
- Pipeline Systems (AREA)
Abstract
Fremgangsmåte og anordning ved rørledning (1) for transport av et fluid fra et brønnhode (2) og til et fartøy (8) hvor fluidet i rørledningen (1) av brønntekniske årsaker må tildeles strømningshjelp, og hvor rørledningen (1) er forsynt med minst ett injeksjonspunkt for et drivfluid idet injeksjonspunktet kan utgjøres av en ejektor (20).Method and device at pipeline (1) for transporting a fluid from a wellhead (2) and to a vessel (8) where the fluid in the pipeline (1) must be allocated flow assistance for well technical reasons, and where the pipeline (1) is provided with at least one injection point for a propellant fluid, the injection point being constituted by an ejector (20).
Description
ANORDNING OG FREMGANGSMÅTE VED STRØMNINGSHJELP I EN RØRLEDNING DEVICE AND PROCEDURE FOR FLOW ASSISTANCE IN A PIPELINE
Denne oppfinnelse vedrører strømningshjelp i en rørledning. Nærmere bestemt dreier det seg om en rørledning for transport av et fluid fra et brønnhode og til et fartøy hvor fluidet som befinner seg i rørledningen av brønntekniske årsaker må tildeles stømningshjelp, og hvor rørledningen langs sin leng-de er forsynt med minst ett injeksjonspunkt for et drivfluid. Injeksjonspunktet kan utgjøres av en fluiddrevet ejektor. Oppfinnelsen omfatter også en fremgangsmåte for anvendelse av anordningen. This invention relates to flow assistance in a pipeline. More specifically, it concerns a pipeline for the transport of a fluid from a wellhead and to a vessel where, for well technical reasons, the fluid in the pipeline must be assigned flow aid, and where the pipeline along its length is equipped with at least one injection point for a drive fluid. The injection point can be constituted by a fluid-driven ejector. The invention also includes a method for using the device.
Under boring og utvinning av petroleum er det av bore- og brønntekniske årsaker nødvendig å anvende borefluid som er tilpasset forholdene i brønnen blant annet med hensyn til densitet og viskositet. Det er for eksempel vanlig å anvende borevæske som har en tetthet på omkring 1,6 kg/l. During drilling and extraction of petroleum, it is necessary for drilling and well engineering reasons to use drilling fluid that is adapted to the conditions in the well, among other things with regard to density and viscosity. For example, it is common to use drilling fluid that has a density of around 1.6 kg/l.
Under den første fase av boringen har det tidligere vært vanlig å anvende "engangsborevæske" og deponere det utstrømmende borekaks på havbunnen, noe som er uheldig for miljøet og som også medfører økte kostnader. During the first phase of drilling, it has previously been common to use "disposable drilling fluid" and deposit the flowing cuttings on the seabed, which is unfortunate for the environment and which also entails increased costs.
US-patent 6745851 omhandler arbeid av denne art og beskriver en pumpedrevet løsning som kan gjenvinne og resirkulere borevaesken. Fra US 4967843 er det kjent å la trykket i produsert petroleum økes ved å la fluidet strømme gjennom en ejektor- US patent 6745851 deals with work of this nature and describes a pump-driven solution that can recover and recycle the drilling mud. From US 4967843 it is known to allow the pressure in produced petroleum to be increased by allowing the fluid to flow through an ejector
pumpe som befinner seg på havbunnen. pump located on the seabed.
Når det bores på store dyp til havs, kan trykkhøyden fra borefartøyet og ned til brønnformasjonen bli så stor at borevæske trenger inn i formasjonen. En slik innstrømning av borevæske i formasjonen er uheldig både fordi relativt kost-bar borevæske forsvinner, men også fordi en innstrømning av denne art kan redusere en brønns fremtidige produksjonskapa-sitet . When drilling at great depths offshore, the pressure head from the drilling vessel down to the well formation can become so great that drilling fluid penetrates into the formation. Such an inflow of drilling fluid into the formation is unfortunate both because relatively expensive drilling fluid disappears, but also because an inflow of this kind can reduce a well's future production capacity.
En fremgangsmåte som har fått en viss utbredelse ved brønner til havs innebærer at borevæsken, når den strømmer tilbake fra borehullet, pumpes ut ved brønnhodet på havbunnen og der-etter strømmer tilbake til fartøyet via et separat rør. A method that has become somewhat widespread with offshore wells means that the drilling fluid, when it flows back from the borehole, is pumped out at the wellhead on the seabed and then flows back to the vessel via a separate pipe.
På denne måte kan det statiske trykk i borehullet styres, for eksempel ved å styre væskehøyden i stigerøret, dersom et slikt er montert, mellom brønnhodet og fartøyet. In this way, the static pressure in the borehole can be controlled, for example by controlling the liquid height in the riser, if one is installed, between the wellhead and the vessel.
NO-patent 319213 (WO2005052307) beskriver en fremgangsmåte som er rettet mot å styre væsketrykket i brønnen ved å fylle stigerørets øvre parti med et fluid som har ulik tetthet relativt borefluidets tetthet. NO patent 319213 (WO2005052307) describes a method which is aimed at controlling the fluid pressure in the well by filling the upper part of the riser with a fluid that has a different density relative to the density of the drilling fluid.
På relativt store havdyp hvor returrøret nødvendigvis er langt, er nødvendig pumpetrykk ved havbunnen grunnet borefluidets tetthet og viskositet relativt høyt. Det har vist seg vanskelig å oppnå nødvendig strømningsrate uten å måtte anvende rør med relativt stor diameter, noe som medfører økt rørvekt og derved betydelig høyere investeringskostnader. At relatively large sea depths where the return pipe is necessarily long, the necessary pump pressure at the seabed is relatively high due to the density and viscosity of the drilling fluid. It has proven difficult to achieve the required flow rate without having to use pipes with a relatively large diameter, which entails increased pipe weight and thereby significantly higher investment costs.
Oppfinnelsen har til formål å avhjelpe eller å redusere i det minste en av ulempene ved kjent teknikk. The purpose of the invention is to remedy or to reduce at least one of the disadvantages of known technology.
Formålet oppnås ved trekk som er angitt i nedenstående be-skrivelse og i etterfølgende patentkrav. The purpose is achieved by features which are indicated in the description below and in subsequent patent claims.
En rørledning i overensstemmelse med oppfinnelsen for transport av et fluid fra et brønnhode og til et fartøy hvor fluidet som befinner seg i rørledningen av brønntekniske årsaker må tildeles stømningshjelp, idet drivfluid til et injeksjonspunkt på rørledningen er tilført fra overflaten, kjennetegnes ved at rørledningen, som er forankret ved havbunnen, er forsynt med minst ett injeksjonspunkt for drivfluidet mellom havbunnen og overflaten. A pipeline in accordance with the invention for the transport of a fluid from a wellhead and to a vessel where the fluid that is in the pipeline for well technical reasons must be assigned flow aid, as drive fluid to an injection point on the pipeline is supplied from the surface, is characterized by the pipeline, which is anchored to the seabed, is provided with at least one injection point for the driving fluid between the seabed and the surface.
Mest fordelaktig utgjøres injeksjonspunktet av en fluiddrevet ejektor. Most advantageously, the injection point is constituted by a fluid-driven ejector.
Ett eller flere slike injeksjonspunkt kan være anbrakt med passende mellomrom langs rørledningen fra havbunnen og opp til fartøyet. Rørledningen utgjør en separat strømningsvei relativt et eventuelt stigerør. One or more such injection points can be placed at suitable intervals along the pipeline from the seabed up to the vessel. The pipeline constitutes a separate flow path relative to any riser.
Når injeksjonspunktet utgjøres av en ejektor, vil en eventu-ell ovenfor denne seg befinnende ejektor avlaste den ejektor som befinner seg nedenfor, slik at denne ejektor igangsetter en strømning som mater den ovenfor seg befinnende ejektor med fluid. When the injection point is formed by an ejector, any ejector located above this will relieve the ejector located below, so that this ejector initiates a flow which feeds the ejector located above with fluid.
Alternativt kan det være anordnet en pumpe som pumper fluidet gjennom rørledningen, idet en eller flere ejektorer ved rør-ledningens øvre partier utgjør hjelpeapparater for å oppnå en tilstrekkelig strømningsrate gjennom rørledningen. Alternatively, a pump can be arranged which pumps the fluid through the pipeline, with one or more ejectors at the upper parts of the pipeline forming auxiliary devices to achieve a sufficient flow rate through the pipeline.
Drivfluidet har typisk en lavere densitet enn det fluid som befinner seg i rørledningen. Ved injeksjon av et andre fluid vil således det totale væsketrykk i rørledningen ved havbunnen bli redusert. The drive fluid typically has a lower density than the fluid in the pipeline. By injecting a second fluid, the total liquid pressure in the pipeline at the seabed will thus be reduced.
Dersom det andre fluid omfatter en gass, vil gassen kunne ekspandere etter hvert som den stiger i rørledningen og derved ytterligere redusere det totale væsketrykk i rørledningen ved havbunnen. If the second fluid comprises a gas, the gas will be able to expand as it rises in the pipeline and thereby further reduce the total liquid pressure in the pipeline at the seabed.
Rørledningen, som er forankret på havbunnen, kan være forsynt med oppdriftslegemer ved sitt øvre parti, eller den kan heng-es av i fartøyet som da bærer vekten av rørledningen. The pipeline, which is anchored to the seabed, can be provided with buoyancy bodies at its upper part, or it can be suspended from the vessel, which then bears the weight of the pipeline.
Anordningen og fremgangsmåten ifølge oppfinnelsen kan til-veiebringe en tilfredsstillende strømningsrate i rørledningen selv ved anvendelse av en rørledning med relativt liten diameter. The device and method according to the invention can provide a satisfactory flow rate in the pipeline even when using a pipeline with a relatively small diameter.
I det etterfølgende beskrives et eksempel på en foretrukket utførelsesform og fremgangsmåte som er anskueliggjort på med-følgende tegninger, hvor: Fig. 1 viser skjematisk et fartøy som er forsynt med en rør-ledning i henhold til oppfinnelsen; og In what follows, an example of a preferred embodiment and method is described which is visualized in the accompanying drawings, where: Fig. 1 schematically shows a vessel which is provided with a pipeline according to the invention; and
Fig. 2 viser oppfinnelsen i en alternativ utførelsesform. Fig. 2 shows the invention in an alternative embodiment.
På tegningene betegner henvisningstallet 1 en rørledning som ved sitt nedre endeparti er koplet til et brønnhode 2 på havbunnen 4, og som ved sitt øvre endeparti er koplet til en ut-skiller 6. Utskilleren 6 befinner seg på et fartøy 8. In the drawings, the reference number 1 denotes a pipeline which, at its lower end, is connected to a wellhead 2 on the seabed 4, and which, at its upper end, is connected to a separator 6. The separator 6 is located on a vessel 8.
Fartøyet 8 utfører typisk arbeid i en brønn 10 i grunnen og er koplet til brønnen 10 ved hjelp av en rørforbindelse 12 som forløper gjennom brønnhodet 2. Rørforbindelsen 12 kan, alt etter hva slags arbeider det dreier seg om, på i og for seg kjent måte omfatte en eller flere av borerør, marint stigerør, arbeidsstigerør eller andre brønnintervensjonsverktøy. The vessel 8 typically performs work in a well 10 in the ground and is connected to the well 10 by means of a pipe connection 12 which runs through the wellhead 2. The pipe connection 12 can, depending on the type of work involved, in a manner known per se include one or more drill pipes, marine risers, work risers or other well intervention tools.
Rørledningen 1 er forankret på havbunnen 4 ved hjelp av et anker 14. Ved sitt øvre parti, nær havoverflaten 16, er det anordnet et oppdriftslegeme 18 som er innrettet til å kunne oppta vekten av rørledningen 1. The pipeline 1 is anchored to the seabed 4 by means of an anchor 14. At its upper part, close to the sea surface 16, a buoyancy body 18 is arranged which is designed to be able to absorb the weight of the pipeline 1.
På innbyrdes passende avstand er rørledningen 1 forsynt med fluiddrevne ejektorer 20 som tilføres drivfluid fra fartøyet 8 via minst ett drivfluidrør 22. At mutually suitable distances, the pipeline 1 is provided with fluid-driven ejectors 20 which are supplied with drive fluid from the vessel 8 via at least one drive fluid pipe 22.
Når et fluid skal bringes til å strømme gjennom rørledningen 1 fra brønnhodet 2, åpnes trykkfluidtilførselen via drivflu-idrøret 22 fra fartøyet 8 og til ejektorene 20. Strømningen kommer i gang ved at hver ejektor 20 tilfører nødvendig trykk til fluidet inntil fluidet strømmer til neste ejektor langs rørledningen 1. When a fluid is to be made to flow through the pipeline 1 from the wellhead 2, the pressure fluid supply is opened via the drive fluid pipe 22 from the vessel 8 and to the ejectors 20. The flow is started by each ejector 20 adding the necessary pressure to the fluid until the fluid flows to the next ejector along pipeline 1.
Ved fartøyet 8 strømmer fluidet inn i -utskilleren 6 hvor eventuelle drivgasser skilles fra det øvrige fluid før det resterende fluid strømmer videre til behandling for eksempel i ikke viste siktemaskiner. At the vessel 8, the fluid flows into the -separator 6, where any propellant gases are separated from the other fluid before the remaining fluid flows on for treatment, for example in screening machines not shown.
Returtrykket ved brønnhodet 2 kan styres ved å regulere driv-fluidtrykket inn til ejektorene 20. The return pressure at the wellhead 2 can be controlled by regulating the driving fluid pressure to the ejectors 20.
I en alternativ utførelsesform, se fig. 2, er det anordnet en mekanisk arbeidende pumpe 24 ved rørledningens 1 nedre parti. Ejektorene 20, som er anordnet ved rørets 1 øvre parti, an-vendes her for å øke strømningsraten gjennom rørledningen 1 utover det pumpen 24 kan besørge på egen hånd. In an alternative embodiment, see fig. 2, a mechanically working pump 24 is arranged at the lower part of the pipeline 1. The ejectors 20, which are arranged at the upper part of the pipe 1, are used here to increase the flow rate through the pipeline 1 beyond what the pump 24 can provide on its own.
Claims (8)
Priority Applications (7)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NO20063269A NO325931B1 (en) | 2006-07-14 | 2006-07-14 | Device and method of flow aid in a pipeline |
| PCT/NO2007/000269 WO2008007973A1 (en) | 2006-07-14 | 2007-07-13 | Pipe string device for conveying a fluid from a well head to a vessel |
| MX2009000458A MX2009000458A (en) | 2006-07-14 | 2007-07-13 | Pipe string device for conveying a fluid from a well head to a vessel. |
| EP07793921A EP2041477A1 (en) | 2006-07-14 | 2007-07-13 | Pipe string device for conveying a fluid from a well head to a vessel |
| BRPI0714138-6A BRPI0714138A2 (en) | 2006-07-14 | 2007-07-13 | piping column device for conveying fluid from a vessel wellhead |
| CA002657557A CA2657557A1 (en) | 2006-07-14 | 2007-07-13 | Pipe string device for conveying a fluid from a well head to a vessel |
| US12/373,628 US20100006297A1 (en) | 2006-07-14 | 2007-07-31 | Pipe string device for conveying a fluid from a well head to a vessel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NO20063269A NO325931B1 (en) | 2006-07-14 | 2006-07-14 | Device and method of flow aid in a pipeline |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| NO20063269L NO20063269L (en) | 2008-01-15 |
| NO325931B1 true NO325931B1 (en) | 2008-08-18 |
Family
ID=38923461
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NO20063269A NO325931B1 (en) | 2006-07-14 | 2006-07-14 | Device and method of flow aid in a pipeline |
Country Status (7)
| Country | Link |
|---|---|
| US (1) | US20100006297A1 (en) |
| EP (1) | EP2041477A1 (en) |
| BR (1) | BRPI0714138A2 (en) |
| CA (1) | CA2657557A1 (en) |
| MX (1) | MX2009000458A (en) |
| NO (1) | NO325931B1 (en) |
| WO (1) | WO2008007973A1 (en) |
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| US8281875B2 (en) | 2008-12-19 | 2012-10-09 | Halliburton Energy Services, Inc. | Pressure and flow control in drilling operations |
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| WO2011106004A1 (en) * | 2010-02-25 | 2011-09-01 | Halliburton Energy Services, Inc. | Pressure control device with remote orientation relative to a rig |
| US8820405B2 (en) | 2010-04-27 | 2014-09-02 | Halliburton Energy Services, Inc. | Segregating flowable materials in a well |
| US8201628B2 (en) | 2010-04-27 | 2012-06-19 | Halliburton Energy Services, Inc. | Wellbore pressure control with segregated fluid columns |
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| US9447647B2 (en) | 2011-11-08 | 2016-09-20 | Halliburton Energy Services, Inc. | Preemptive setpoint pressure offset for flow diversion in drilling operations |
| US9249637B2 (en) * | 2012-10-15 | 2016-02-02 | National Oilwell Varco, L.P. | Dual gradient drilling system |
| KR101311000B1 (en) * | 2013-01-11 | 2013-09-24 | 주식회사 지앤지테크놀러지 | Apparatus and method for removing local emission and precipitated sand of underground water excavation work |
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| US7093662B2 (en) * | 2001-02-15 | 2006-08-22 | Deboer Luc | System for drilling oil and gas wells using a concentric drill string to deliver a dual density mud |
| US6843331B2 (en) * | 2001-02-15 | 2005-01-18 | De Boer Luc | Method and apparatus for varying the density of drilling fluids in deep water oil drilling applications |
| US6802379B2 (en) * | 2001-02-23 | 2004-10-12 | Exxonmobil Upstream Research Company | Liquid lift method for drilling risers |
| NO337346B1 (en) * | 2001-09-10 | 2016-03-21 | Ocean Riser Systems As | Methods for circulating a formation influx from a subsurface formation |
| US6966367B2 (en) * | 2002-01-08 | 2005-11-22 | Weatherford/Lamb, Inc. | Methods and apparatus for drilling with a multiphase pump |
| US6814142B2 (en) * | 2002-10-04 | 2004-11-09 | Halliburton Energy Services, Inc. | Well control using pressure while drilling measurements |
| US20040065440A1 (en) * | 2002-10-04 | 2004-04-08 | Halliburton Energy Services, Inc. | Dual-gradient drilling using nitrogen injection |
| NO20033198D0 (en) * | 2003-07-15 | 2003-07-15 | Norway Seafoods As | Device by trawl |
| NO319213B1 (en) * | 2003-11-27 | 2005-06-27 | Agr Subsea As | Method and apparatus for controlling drilling fluid pressure |
| GB0407659D0 (en) * | 2004-04-03 | 2004-05-05 | Frontier Engineering Solutions | Method and apparatus |
-
2006
- 2006-07-14 NO NO20063269A patent/NO325931B1/en active IP Right Review Request
-
2007
- 2007-07-13 EP EP07793921A patent/EP2041477A1/en not_active Withdrawn
- 2007-07-13 WO PCT/NO2007/000269 patent/WO2008007973A1/en active Application Filing
- 2007-07-13 MX MX2009000458A patent/MX2009000458A/en unknown
- 2007-07-13 CA CA002657557A patent/CA2657557A1/en not_active Abandoned
- 2007-07-13 BR BRPI0714138-6A patent/BRPI0714138A2/en not_active IP Right Cessation
- 2007-07-31 US US12/373,628 patent/US20100006297A1/en not_active Abandoned
Also Published As
| Publication number | Publication date |
|---|---|
| WO2008007973A1 (en) | 2008-01-17 |
| US20100006297A1 (en) | 2010-01-14 |
| BRPI0714138A2 (en) | 2012-12-25 |
| MX2009000458A (en) | 2009-01-27 |
| NO20063269L (en) | 2008-01-15 |
| CA2657557A1 (en) | 2008-01-17 |
| EP2041477A1 (en) | 2009-04-01 |
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Legal Events
| Date | Code | Title | Description |
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| CB | Opposition filed (par. 26,5 patents act) |
Opponent name: OCEAN RISER SYSTEMS AS, LILLEAKERVEIEN 2B, OSLO, 0 Effective date: 20090515 |
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| BDEC | Board of appeal decision |
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