EP1859167A1 - Procede et appareil de transport de fluide dans une conduite - Google Patents

Procede et appareil de transport de fluide dans une conduite

Info

Publication number
EP1859167A1
EP1859167A1 EP05814040A EP05814040A EP1859167A1 EP 1859167 A1 EP1859167 A1 EP 1859167A1 EP 05814040 A EP05814040 A EP 05814040A EP 05814040 A EP05814040 A EP 05814040A EP 1859167 A1 EP1859167 A1 EP 1859167A1
Authority
EP
European Patent Office
Prior art keywords
fluid
dividing means
wave
downstream side
fluid dividing
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.)
Withdrawn
Application number
EP05814040A
Other languages
German (de)
English (en)
Inventor
Magomet Sagov
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.)
Clavis Impulse Technology AS
Original Assignee
Clavis Impulse Technology AS
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 Clavis Impulse Technology AS filed Critical Clavis Impulse Technology AS
Priority to EP08171827A priority Critical patent/EP2063123A3/fr
Publication of EP1859167A1 publication Critical patent/EP1859167A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
    • F04B53/10—Valves; Arrangement of valves
    • F04B53/12—Valves; Arrangement of valves arranged in or on pistons
    • 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
    • E21B43/12—Methods or apparatus for controlling the flow of the obtained fluid to or in wells
    • E21B43/121—Lifting well fluids
    • E21B43/126—Adaptations of down-hole pump systems powered by drives outside the borehole, e.g. by a rotary or oscillating drive
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B43/00—Machines, pumps, or pumping installations having flexible working members
    • F04B43/02—Machines, pumps, or pumping installations having flexible working members having plate-like flexible members, e.g. diaphragms
    • F04B43/06—Pumps having fluid drive
    • F04B43/073—Pumps having fluid drive the actuating fluid being controlled by at least one valve
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B47/00—Pumps or pumping installations specially adapted for raising fluids from great depths, e.g. well pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B47/00—Pumps or pumping installations specially adapted for raising fluids from great depths, e.g. well pumps
    • F04B47/02—Pumps or pumping installations specially adapted for raising fluids from great depths, e.g. well pumps the driving mechanisms being situated at ground level
    • 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
    • F04F7/00—Pumps displacing fluids by using inertia thereof, e.g. by generating vibrations therein

Definitions

  • the present application relates to a method and an apparatus for transporting fluid in a conduit, for example a pipe, as disclosed respectively in the preamble of independent claims 1 and 6.
  • Galileo Galilei invented a pump which basically can be termed a syringe. In this connection, he noticed that it was impossible to draw water up from a depth of more than about 10 metres. Galileo could not explain the reason for this limitation, but this phenomenon has since been explained and in hydraulic engineering today it is acknowledged that the theoretical 10-metre boundary line cannot be crossed. In practice, due to various effects (for example, friction), the suction lift limit is less than about seven metres.
  • the previously known pumps therefore have clear limitations.
  • the suction lift limit means that in the case of vertical transport of a fluid over large distances towards the surface, for example, in the offshore industry, a pump must be installed on the bottom and additional pumps must be installed in series in the direction of transport. This makes installation and maintenance difficult, and since the entire weight of the fluid column is lifted during pumping, an enormous amount of energy is required to pump the fluid when the transport distances involved are long.
  • the drawbacks of the previously known pumps are therefore the aforementioned suction lift limit, low efficiency and high energy consumption.
  • Acoustic waves are large pressure oscillations, and when a wave encounters a valve, the valve remains closed while the pressure difference across the valve is positive (i.e. pressure above atmospheric), and opens when the pressure difference becomes negative (i.e., pressure below atmospheric) in response to the wave being reflected by the valve, thus creating a flow through the valve in the direction of the negative pressure in order to equalise the pressure across the valve.
  • the valve generates the suction effect, and energy is supplied to the valve through the fluid.
  • the fluid carries potential energy in the form of acoustic waves, and a main function of the valve is to transform this energy into kinetic energy, after which the fluid volume that has flowed through the valve in response to the wave's activation thereof is transported in the form of a compression wave which travels through the fluid.
  • the fluid transport, or pumping, thus takes place according to the invention in that each small or incremental fluid volume that flows through the valve is transported downstream through the rest of the fluid in the form of a pressure wave of increased volume density.
  • the parts of the apparatus, or the pump, according to the invention which constitute the wave generator may advantageously be positioned on top of a fluid source, for example, an oil well, and thus positioned will contribute to a dramatic reduction in installation and maintenance costs in addition to a substantial reduction in energy consumption.
  • Only the part of the device which constitutes the fluid dividing means, preferably a check valve, will be arranged at the fluid transport starting point, which often means at the bottom of the fluid source.
  • a check valve of this kind will be relatively easy to put in place, and does not require any external energy supply apart from the energy supplied through the fluid in the form of waves.
  • the wave generator will thus be the part of the apparatus that requires external energy supply via power cables, hydraulic lines, mechanical transmissions or the like.
  • the wave generator can be temporarily replaced by a new one, thereby allowing continuous operation.
  • the apparatus and the method according to the invention will thus result in reduced total costs, which will always be a major objective in oil production.
  • the apparatus, or the pump, according to the invention is highly efficient, and its efficiency has been measured to be up to 95%.
  • the transport material may be liquids, gases, multiphase fluids or highly viscous fluids. Successful tests have also been conducted with a non-Newtonian fluid.
  • Figure 1 is a simplified diagram of a first embodiment of the apparatus according to the invention used for vertical transport of a fluid from a lower to an upper fluid reservoir;
  • Figure 2 is a simplified diagram of a second embodiment of the apparatus according to the invention, and includes an enlarged detailed view of a part of the apparatus;
  • Figure 3 is a sectional view of the apparatus shown in Figure 1 along the line B - B;
  • Figure 4 is a graph of the oscillatory motion of the apparatus shown in Figures 1, 2 and Figure 5 is a graph of pressure measurements made during a test of the apparatus according to the invention.
  • Figure 6 is a graph of pressure measurements made during another test of an apparatus according to the invention.
  • upstream and downstream are related to the direction of fluid transport or pumping direction, as should be implicitly apparent.
  • Figure 1 shows a first embodiment of the apparatus according to the invention, where fluid is transported from a lower 1 to an upper 2 fluid reservoir through a pipe 3, and comprising a wave generator 4 and a fluid dividing means in the form of a check valve 5 located at a lower end of the pipe 3 submerged in the reservoir 1.
  • Another check valve 6 is shown located downstream of the wave generator 4.
  • This check valve 6 may have a stabiliser function, serve as a regulator of several parameters depending on the structure of the fluid transport system, or alternatively be omitted.
  • the direction of fluid transport is indicated by solid arrows, whilst the direction of travel of a wave generated by the wave generator 4 is indicated by a stippled arrow.
  • the check valves 5, 6 are basically constructed in that spring-loaded balls lie sealingly against respective valve seats, as will readily be apparent to a person of skill in the art.
  • the check valve will open in order to then be closed again because of the pressure difference that occurs across the valve as a result of the wave, as explained above.
  • An incremental fluid volume ⁇ V will then flow concurrently through the valve 5, and travel in the form of a pressure wave through the fluid in the pipe 3 on the downstream side of the valve 5 to the upper fluid reservoir 2.
  • the wave generator 4 does not initially need to generate a wave directly in liquid in order to cause liquid to be transported from the lower 1 to the upper 2 fluid reservoir, as the wave can be transmitted between different fluids in gas and liquid state.
  • the wave generator 4 consists of the following main components: a membrane 7, an oscillator 8 and a vibrator or power source 9.
  • the basic mode of operation of the wave generator 4 will be explained in more detail below with reference to Figures 2 and 3, which show a second embodiment of the invention in which the wave generator and fluid dividing means - unlike in the first embodiment shown in Figure 1 - constitute an integral unit in that a plurality of check valves 5 are arranged in a piston 7'.
  • the oscillator 8 includes an oscillating weight 10 disposed between a first end of two coil springs 11 and 12, and connected to the piston T via a shaft 13.
  • a second end of the coil spring 12 is rigidly supported, and a second end of the coil spring 11 is connected to the vibrator or power source 9 which via the coil spring 11 and at a given frequency imparts to the oscillating weight 10 a translational oscillating motion of an amplitude of A about a neutral point N.
  • the oscillating weight 10 will, together with the coil springs 11 and 12, form a part of an oscillating system having a given resonant frequency, and the motion of the oscillating weight 10 will be transmitted to the piston T via the shaft 13.
  • the oscillating weight 10 and the piston 7' will thus oscillate at an amplitude A at a given frequency, and it will be apparent to those skilled in the art that a small amplitude, for example in the range of 5 mm, and high frequency, for example in the range of 100 Hz, will cause a high acceleration which in turn will cause the fluid on the downstream side of the piston T to be supplied with a high power impulse from the piston 7'. Furthermore, the potential energy and kinetic energy of the oscillating system, minus the energy losses in the system, will always be constant, the losses here consisting mainly of the power impulse supplied to the fluid via the piston T.
  • FIG. 2 shows the structure of the check valves 5 more clearly.
  • Each valve is arranged as a through opening in the piston 7' perpendicular to the piston T surface 14.
  • a membrane 15 with a central orifice 16 is provided in the through opening.
  • a central abutment element 17 for the membrane 15 is also provided, so that a part of the membrane 15 will be moved into sealing contact with the abutment element by the positive pressure formed on the downstream side of the valve 5 when the piston moves in the downstream direction. Fluid flow through the valve 5 will thus be prevented.
  • the piston 7' moves in the upstream direction, it will be apparent to those skilled in the art that fluid flow through the valve 5 can take place unimpeded.
  • valves 5 are open when the piston T moves counter-flow, the motion resistance of the piston in this direction will be small, and it may therefore be more descriptive to say that the incremental fluid volume ⁇ V is "captured" on the downstream side of the piston during the counter-flow motion of the piston 7' than that the incremental fluid volume ⁇ V flows through the valve, as the pressure difference across the piston T will be small during the counter-flow motion of the piston T.
  • Figure 5 shows a graph of pressure measurements as a function of time made at two different points in a pipe during a suction lift test of one embodiment of the apparatus according to the invention which is essentially identical to the embodiment shown in Fig. 1, and where, as previously mentioned, a suction lift height of 24 metres was obtained. From the figure it can be seen that, as expected, there is a phase displacement between the pressure waves (represented by the peaks in the figure) by the apparatus (i.e., at a reference height equal to zero metres) and the pressure waves 16 metres upstream in the pipe from the said reference height (i.e., lower than the apparatus), as the pressure waves moves through the fluid at a given wave velocity.
  • the pressure waves are in fact also intensified as the pressure 16 metres upstream in the pipe is considerably higher than at the said reference height.
  • wave physics it is generally known that waves travel more easily in a denser or more compressed medium, and the explanation of the aforementioned phenomenon is believed to reside in the fact that the static pressure, and thus also the density, of a fluid generally increases with increasing depth in the fluid, and that the wave is intensified because it travels though a medium having steadily increasing pressure and density.
  • Figure 6 is a graph of pressure measurements made during a test of another, small-scale embodiment of an apparatus according to the invention, essentially like the embodiment shown in Figures 2 and 3, and where the pressure was measured at three different points.
  • the different points were immediately upstream of the apparatus (indicated by a circular symbol), immediately downstream of the apparatus (indicated by a cruciform symbol) and at a greater downstream distance from the apparatus (indicated by square symbol).
  • the figure shows respectively the mean pressure, the maximum pressure and the RMS pressure as a function of frequency, and as can be seen from the figure, the mean pressure, the maximum pressure and the RMS pressure all increase in the downstream direction.
  • the test readings indicate that in particular the maximum pressure and the RMS pressure difference between the measuring points increases with increasing frequency, which is believed to be due to wave superposition.
  • a semi-permeable membrane may alternatively be provided, where fluid can simply flow through the membrane in the downstream direction, and instead of springs 11, 12, other types of energy storing elements may alternatively be provided, for example, closed devices filled with a compressible medium, magnets of the same polarity, resilient materials such a rubber or the like, which have small losses due to inner frictional resistance.
  • the power source 9 need not be an electric vibrator as shown in Figure 1, but may be any form of motor or power-generating device which either directly or indirectly produces a translational oscillating motion of a desired frequency and amplitude.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General 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)
  • Reciprocating Pumps (AREA)

Abstract

L’invention concerne un procédé de transport de fluide dans une conduite (3), par exemple un tuyau, comprenant un moyen de séparation de fluide (5) dans la conduite, qui sépare la conduite (3) en un côté amont et un côté aval, le moyen de séparation de fluide (5) empêchant, dans un premier état, la communication de fluide entre le côté amont et le côté aval et permettant, dans un deuxième état, la communication de fluide entre le côté amont et le côté aval. Le procédé est caractérisé par les étapes consistant à : générer au moins une onde dans le fluide du côté aval du moyen de séparation de fluide (5), cette onde amenant le moyen de séparation de fluide (5) dans le deuxième état, de façon à ce qu’un volume de fluide incrémental ΔV provenant du côté amont du moyen de séparation de fluide (5) puisse s’écouler vers le côté aval du moyen de séparation de fluide (5) ; et provoquer un changement de pression du côté aval du moyen de séparation de fluide (5) lorsque le moyen de séparation de fluide (5) est ramené dans le premier état, en vertu de quoi le volume de fluide incrémental ΔV est transporté sous la forme d’une onde de pression qui se propage dans le fluide du côté aval du moyen de séparation de fluide (5). L’invention concerne également un appareil permettant de mettre en œuvre le procédé, comprenant un générateur d’onde (4) pour générer ladite au moins une onde dans le fluide.
EP05814040A 2004-12-09 2005-12-05 Procede et appareil de transport de fluide dans une conduite Withdrawn EP1859167A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP08171827A EP2063123A3 (fr) 2004-12-09 2005-12-05 Procédé et appareil pour le transport de fluides dans une conduite

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NO20045382A NO20045382D0 (no) 2004-12-09 2004-12-09 Fremgangsmate og anordning for transport av fluid i en kanal
PCT/NO2005/000449 WO2006062413A1 (fr) 2004-12-09 2005-12-05 Procede et appareil de transport de fluide dans une conduite

Related Child Applications (1)

Application Number Title Priority Date Filing Date
EP08171827A Division EP2063123A3 (fr) 2004-12-09 2005-12-05 Procédé et appareil pour le transport de fluides dans une conduite

Publications (1)

Publication Number Publication Date
EP1859167A1 true EP1859167A1 (fr) 2007-11-28

Family

ID=35198133

Family Applications (2)

Application Number Title Priority Date Filing Date
EP05814040A Withdrawn EP1859167A1 (fr) 2004-12-09 2005-12-05 Procede et appareil de transport de fluide dans une conduite
EP08171827A Withdrawn EP2063123A3 (fr) 2004-12-09 2005-12-05 Procédé et appareil pour le transport de fluides dans une conduite

Family Applications After (1)

Application Number Title Priority Date Filing Date
EP08171827A Withdrawn EP2063123A3 (fr) 2004-12-09 2005-12-05 Procédé et appareil pour le transport de fluides dans une conduite

Country Status (3)

Country Link
EP (2) EP1859167A1 (fr)
NO (1) NO20045382D0 (fr)
WO (1) WO2006062413A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2063123A2 (fr) 2004-12-09 2009-05-27 Clavis Impulse Technology AS Procédé et appareil pour le transport de fluides dans une conduite

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NO330266B1 (no) 2009-05-27 2011-03-14 Nbt As Anordning som anvender trykktransienter for transport av fluider
CA2801640A1 (fr) 2010-06-17 2011-12-22 Impact Technology Systems As Procede utilisant les transitoires de pression dans des operations de recuperation d'hydrocarbures
AR089304A1 (es) 2011-12-19 2014-08-13 Impact Technology Systems As Metodo para recuperacion de presion por impacto
EP2647844A1 (fr) 2012-04-05 2013-10-09 AT Enterprise AS Procédé de pompage de fluide
CN116292217B (zh) * 2023-05-19 2023-07-21 胜利油田胜机石油装备有限公司 一种具有除砂功能柱塞的可打捞式抽油泵

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE500911A (fr) *
FR558911A (fr) * 1921-12-08 1923-09-06 Pompe à pistons différentiels, à action régularisée
US2527184A (en) * 1946-03-30 1950-10-24 Gerhold Jose Aderito Pump for raising petroleum and other liquids from deep wells
US2555613A (en) * 1946-09-11 1951-06-05 Sochris Dev Company Pump
US3075468A (en) * 1960-04-06 1963-01-29 Hills Mccanna Co Hydraulically actuated diaphragm pump
US3640344A (en) * 1968-12-02 1972-02-08 Orpha Brandon Fracturing and scavenging formations with fluids containing liquefiable gases and acidizing agents
DE69218114T2 (de) * 1991-09-30 1997-10-09 Ebara Corp Schwingrohrpumpe
AU671519B2 (en) * 1993-03-15 1996-08-29 Endo, Katsuhisa Pumping machine and generator system utilizing the same
BR9805280A (pt) * 1998-11-24 2000-06-06 Brasil Compressores Sa Compressor alternativo com motor linear
DE10143978B4 (de) * 2001-09-07 2005-03-03 Lewa Herbert Ott Gmbh + Co. Hydraulisch angetriebene Membranpumpe mit vorgespannter Membran
NO20045382D0 (no) 2004-12-09 2004-12-09 Clavis Impuls Technlogy As Fremgangsmate og anordning for transport av fluid i en kanal

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2006062413A1 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2063123A2 (fr) 2004-12-09 2009-05-27 Clavis Impulse Technology AS Procédé et appareil pour le transport de fluides dans une conduite

Also Published As

Publication number Publication date
EP2063123A3 (fr) 2009-06-03
NO20045382D0 (no) 2004-12-09
EP2063123A2 (fr) 2009-05-27
WO2006062413A1 (fr) 2006-06-15

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