WO2003052278A1 - Dispositif servant a transformer un ecoulement gaz-liquide avec bouchons en ecoulement laminaire - Google Patents

Dispositif servant a transformer un ecoulement gaz-liquide avec bouchons en ecoulement laminaire Download PDF

Info

Publication number
WO2003052278A1
WO2003052278A1 PCT/NO2002/000481 NO0200481W WO03052278A1 WO 2003052278 A1 WO2003052278 A1 WO 2003052278A1 NO 0200481 W NO0200481 W NO 0200481W WO 03052278 A1 WO03052278 A1 WO 03052278A1
Authority
WO
WIPO (PCT)
Prior art keywords
pipe
flow
gas
liquid
arrangement
Prior art date
Application number
PCT/NO2002/000481
Other languages
English (en)
Inventor
Per Gramme
Original Assignee
Norsk Hydro Asa
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 Norsk Hydro Asa filed Critical Norsk Hydro Asa
Priority to AU2002351519A priority Critical patent/AU2002351519A1/en
Publication of WO2003052278A1 publication Critical patent/WO2003052278A1/fr

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
    • E21B43/34—Arrangements for separating materials produced by the well
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D19/00—Degasification of liquids
    • B01D19/0042—Degasification of liquids modifying the liquid flow
    • 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
    • E21B2200/00—Special features related to earth drilling for obtaining oil, gas or water
    • E21B2200/09—Detecting, eliminating, preventing liquid slugs in production pipes

Definitions

  • the present invention concerns an arrangement in connection with a pipe for transformation of gas/liquid slug flow into stratified flow.
  • Slugs are formed in connection with flows in pipes where there are gas and liquid. Such slugs will, depending on the speed of the liquid flow and the slugs, be harmful in many contexts. Among other things, such slugs may create large increases in pressure, which may, in a worst case scenario, lead to pipe fractures and damage to equipment used. In situations in which the liquid contains two or more fluid components, there may be unfortunate consequences such as mixing of components and the formation of emulsions. Moreover, a separator cannot operate (function) under a slug flow regime.
  • the present invention is characterised in that the pipe is connected to a second pipe with a larger diameter.
  • a body is arranged that is designed to conduct the liquid/gas flow in a direction towards the wall of the second pipe, as a result of which the natural flow pattern of the gas/liquid in the second pipe becomes stratified over a predefined distance as defined in the attached claim 1.
  • Figure 1 shows a diagram of a transport pipe with a solution in accordance with the present invention.
  • FIG. 2 shows an alternative embodiment of the present invention
  • FIG. 3 shows yet another alternative embodiment of the present invention.
  • Figure 1 shows a diagram of a transport pipe 1 with a solution in accordance with the present invention.
  • the special feature of the solution is that the pipe 1 for transporting liquid and gas is connected to a pipe 3 with a larger diameter and, at the transition between the pipe 1 and the pipe 3 with the larger diameter, a body 2 is arranged that is designed to conduct the flow of gas/liquid towards the outer wall of the pipe 3.
  • the body 2 may be in the form of a cone-shaped plug placed centrically in the pipe and fixed to the pipe wall by means of radial fixing legs (not shown), or it may be in the form of a triangular beam that extends across the pipe and is fixed to the pipe wall at each side.
  • the transition between the transport pipe 1 and the pipe with the larger diameter is expediently formed by a funnel-shaped part with an angle ⁇ in relation to the direction of flow that largely corresponds to the angle ⁇ for the body 2.
  • One precondition for achieving stratified flow is that the diameter of the pipe 3 is large enough to make the natural flow pattern stratified.
  • the ratio between the diameter of the transport pipe 1 , the diameter of the pipe 3 with the larger diameter and the diameter of the body 2, or the extent of it in the pipe will depend on the flow speed, the gas/liquid ratio, the viscosity of the liquid and the density of the liquid.
  • the solution in accordance with the present invention works as follows. When a slug arrives in the pipe 1 , the liquid will be pressed outwards towards the pipe wall in the pipe 3 as it passes the body 2. The liquid is deflected towards the wall and will be reflected inwards at an angle towards the interface that is initially protected by the flow space behind the body 2. As the liquid flow enters the pipe 3 with the larger diameter, the gas/liquid separation starts in the pipe behind the body.
  • FIG. 2 shows an alternative embodiment in which a perforated plate 4 is used downstream of the body 2.
  • the perforated plate is intended to even out the flow speed in the gas and liquid phases across the pipe cross-section and to break down the slug flow wave across the cross-section. More precisely, when the liquid wave breaks against the plate, liquid jets are formed that, on account of gravitation, are deflected downwards towards the subsequent interface for the liquid.
  • the typical flow speed through the hole openings is two to three times the flow speed in the liquid and gas phases respectively.
  • the perforated plate thus contributes to faster establishment of calm, uniform flow conditions in the stratified phases.
  • Figure 3 shows yet another embodiment in which, instead of a perforated plate as shown in Figure 2, an insert 5 of mainly horizontal and virtually parallel plates or parallel, virtually horizontal, channels is used immediately after the body 2, in the direction of flow of the pipe 3.
  • the intention of these plates is, as in the example shown in Figure 2, to even out the flow conditions and break down the slugs and thus contribute to the maintenance of a clear gas/liquid interface downstream of the plates.
  • the gas/liquid will rapidly be established in a stratified flow, depending on the gas/liquid ratio.
  • the small distance between the plates will mean that gas bubbles and drops do not need to float/be sedimented so much before they are separated by the top or bottom plate in the respective channel.
  • the liquid phase from each channel will flow vertically downwards from the outlet of the channel, while the gas phase will flow diagonally upwards.
  • the insert 5 will thus contribute to enhancing the efficiency of the separation of gas bubbles and liquid drops and thus minimise the distance before complete stratified flow is achieved.
  • the body 2 may be used separately or in combination. All three components may also expediently be installed in series, preferably with the perforated plate 4 after the body 2 and the plates/channels 5 after the perforated plate 4.
  • the design of the body 2 may also be different from that which is shown and described above.
  • it may have any wedge-shaped or conical form in which the diameter increases in the longitudinal direction of the pipe 1 , 3, for example an exponentially increasing diameter.
  • the expression "pipe” used in the present application may comprise any channel or well with a round, oval or polygonal cross-sectional form.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (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)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Pipe Accessories (AREA)

Abstract

L'invention concerne un dispositif utilisé dans un tuyau (1), servant à transformer un écoulement gaz-liquide avec bouchons en écoulement stratifié. Le tuyau (1) est relié à un second tuyau (3) de diamètre supérieur. Le dispositif comprend un corps (2), disposé au niveau de la jonction du premier tuyau (1) et du second tuyau (3), conçu pour orienter l'écoulement gaz-liquide vers la paroi du second tuyau (3). Ce corps (2) permet ainsi de stratifier, sur une distance prédéterminée, la configuration d'écoulement naturel du gaz-liquide dans le second tuyau (3). Le corps (2) peut être de forme conique ou avoir la forme d'une barre triangulaire disposée à travers le tuyau (au niveau de la jonction entre le premier tuyau (1) et le second tuyau (3)), fixée de part et d'autre sur la paroi du tuyau.
PCT/NO2002/000481 2001-12-19 2002-12-16 Dispositif servant a transformer un ecoulement gaz-liquide avec bouchons en ecoulement laminaire WO2003052278A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU2002351519A AU2002351519A1 (en) 2001-12-19 2002-12-16 Device for the transformation of gas/liquid slug flow to laminar flow

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NO20016216 2001-12-19
NO20016216A NO20016216L (no) 2001-12-19 2001-12-19 Anordning for transformasjon av gass/v¶ske pluggström til lagdelt ström

Publications (1)

Publication Number Publication Date
WO2003052278A1 true WO2003052278A1 (fr) 2003-06-26

Family

ID=19913166

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/NO2002/000481 WO2003052278A1 (fr) 2001-12-19 2002-12-16 Dispositif servant a transformer un ecoulement gaz-liquide avec bouchons en ecoulement laminaire

Country Status (3)

Country Link
AU (1) AU2002351519A1 (fr)
NO (1) NO20016216L (fr)
WO (1) WO2003052278A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NO323087B1 (no) 2003-07-09 2006-12-27 Norsk Hydro As Fremgangsmate og anordning ved separasjon av et fluid, spesielt olje, gass og vann

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3945402A (en) * 1974-10-25 1976-03-23 Murphy Peter J Laminar flow pipe system
US5569859A (en) * 1993-12-28 1996-10-29 Endress & Hauser Flowtec Ag Vortex flow sensor with a drag body

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3945402A (en) * 1974-10-25 1976-03-23 Murphy Peter J Laminar flow pipe system
US5569859A (en) * 1993-12-28 1996-10-29 Endress & Hauser Flowtec Ag Vortex flow sensor with a drag body

Also Published As

Publication number Publication date
NO20016216D0 (no) 2001-12-19
NO20016216L (no) 2003-06-20
AU2002351519A1 (en) 2003-06-30

Similar Documents

Publication Publication Date Title
EP1542779B1 (fr) Dispositif de separation de fluides multiphase
EP1284800B1 (fr) Procede et systeme de separation d'un melange
EP1021231B1 (fr) Ameliorations apportees a un separateur helicoidal
WO2009006672A1 (fr) Séparateur fluide-fluide
WO2010034325A1 (fr) Séparateur gaz-liquide
EP3519673B1 (fr) Procédé et système de séparation de substances de puits de pétrole
JP5214961B2 (ja) 液滴を含む流体流から流体を分離する装置、又はその装置を備えたデバイス、及び、その装置、又はデバイスである多段液滴分離器を運転する方法
WO2003052278A1 (fr) Dispositif servant a transformer un ecoulement gaz-liquide avec bouchons en ecoulement laminaire
RU2708430C1 (ru) Способ эксплуатации обводненной газовой или газоконденсатной скважины
RU2695207C2 (ru) Фазовый сепаратор с использованием разности давлений
EP1476242B1 (fr) Procede de transformation d'ecoulement gazeux/liquide en ecoulement laminaire ou stratifie
CA2893924A1 (fr) Dispositif de reduction de pression a ecoulement cyclonique pour un processus de separation d'emulsion
RU2209961C1 (ru) Способ сепарации продукции скважины и устройство для его осуществления
RU186784U1 (ru) Коалесцирующий элемент для разделения водо-нефтяной смеси
WO2016209086A1 (fr) Système de séparateur et procédé de décomposition de bande de dispersion
RU2065027C1 (ru) Способ эксплуатации нефтяных малодебитных скважин и устройство для его реализации
NO346216B1 (en) Method and system for separating oil well substances
EP2658627A1 (fr) Système de séparation accélérée des fluides multiphasiques

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 BY BZ CA CH CN CO CR CU CZ DE DK DM DZ EC EE ES FI GB GD GE GH GM HR HU ID IL IN IS JP KE KG KP KR KZ LC LK LR LS LT LU LV MA MD MG MK MN MW MX MZ NO NZ OM PH PL PT RO RU SD SE SG SK SL TJ TM TN TR TT TZ UA UG US UZ VN YU ZA ZM ZW

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): GH GM KE LS MW MZ 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 IE IT LU MC NL PT 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
DFPE Request for preliminary examination filed prior to expiration of 19th month from priority date (pct application filed before 20040101)
122 Ep: pct application non-entry in european phase
NENP Non-entry into the national phase

Ref country code: JP

WWW Wipo information: withdrawn in national office

Country of ref document: JP