WO2018172050A1 - Double-plate and double-cylinder pump - Google Patents

Double-plate and double-cylinder pump Download PDF

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Publication number
WO2018172050A1
WO2018172050A1 PCT/EP2018/055359 EP2018055359W WO2018172050A1 WO 2018172050 A1 WO2018172050 A1 WO 2018172050A1 EP 2018055359 W EP2018055359 W EP 2018055359W WO 2018172050 A1 WO2018172050 A1 WO 2018172050A1
Authority
WO
WIPO (PCT)
Prior art keywords
pump
plate
sets
drive shaft
pump according
Prior art date
Application number
PCT/EP2018/055359
Other languages
French (fr)
Inventor
Philippe Pagnier
Julien TROST
Daniel Averbuch
Original Assignee
IFP Energies Nouvelles
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 IFP Energies Nouvelles filed Critical IFP Energies Nouvelles
Priority to US16/496,282 priority Critical patent/US20210108622A1/en
Priority to EP18708691.3A priority patent/EP3601796B1/en
Priority to CN201880019925.7A priority patent/CN110462211A/en
Priority to CA3056167A priority patent/CA3056167A1/en
Publication of WO2018172050A1 publication Critical patent/WO2018172050A1/en

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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
    • F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
    • F04B1/12—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis
    • F04B1/14—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis having stationary cylinders
    • F04B1/16—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis having stationary cylinders having two or more sets of cylinders or pistons
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21B—EARTH DRILLING, e.g. DEEP 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
    • E21B21/08—Controlling or monitoring pressure or flow of drilling fluid, e.g. automatic filling of boreholes, automatic control of bottom pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01B—MACHINES OR ENGINES, IN GENERAL OR OF POSITIVE-DISPLACEMENT TYPE, e.g. STEAM ENGINES
    • F01B3/00—Reciprocating-piston machines or engines with cylinder axes coaxial with, or parallel or inclined to, main shaft axis
    • F01B3/0032—Reciprocating-piston machines or engines with cylinder axes coaxial with, or parallel or inclined to, main shaft axis having rotary cylinder block
    • F01B3/0035—Reciprocating-piston machines or engines with cylinder axes coaxial with, or parallel or inclined to, main shaft axis having rotary cylinder block having two or more sets of cylinders or pistons
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01B—MACHINES OR ENGINES, IN GENERAL OR OF POSITIVE-DISPLACEMENT TYPE, e.g. STEAM ENGINES
    • F01B3/00—Reciprocating-piston machines or engines with cylinder axes coaxial with, or parallel or inclined to, main shaft axis
    • F01B3/0032—Reciprocating-piston machines or engines with cylinder axes coaxial with, or parallel or inclined to, main shaft axis having rotary cylinder block
    • F01B3/0041—Arrangements for pressing the cylinder barrel against the valve plate, e.g. fluid pressure
    • 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
    • F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
    • F04B1/12—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis
    • F04B1/14—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis having stationary cylinders
    • F04B1/141—Details or component parts
    • F04B1/146—Swash plates; Actuating elements
    • 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
    • F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
    • F04B1/12—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis
    • F04B1/20—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis having rotary cylinder block
    • F04B1/2014—Details or component parts
    • F04B1/2078—Swash plates
    • 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
    • F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
    • F04B1/12—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis
    • F04B1/20—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis having rotary cylinder block
    • F04B1/22—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis having rotary cylinder block having two or more sets of cylinders or pistons
    • 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
    • F04B53/16—Casings; Cylinders; Cylinder liners or heads; Fluid connections

Definitions

  • the present invention relates to the field of pumps, in particular for high pressure and high flow pumping, in particular for drilling operations ranging from a few hundred meters to a few kilometers.
  • crankshaft pumps are the most widespread in all sectors of the industry: capital goods, oil, gas and agri-food industries, the automotive sector, construction (heating, wells, air conditioning, water pumps, etc.) and more specifically for the treatment of water and waste (water and sanitation network).
  • pumps of this type have a limited number of pistons (of the order of 5), because of the limitations of the size of the crankshaft which is also subject to high stresses and sudden changes in pressure that can intervene in repression.
  • These pumps therefore have limits in terms of power, torque pressure / flow (limited by "water hammer” generated by the sinusoidal pressure of the crankshaft), weight, yield and service life. In addition, they do not allow to have a variable displacement and therefore lack flexibility of use.
  • the fixed-barrel pumps (FIG. 1): in this pump configuration 1, where the barrel is fixed, it is the inclined plate 2 which rotates (driven by the shaft 5) in order to generate the movement of the pistons 3 in their 4.
  • the connection between the pistons 3 and the plate 2 is then provided by rotatable pads which rub on the plate 2.
  • the advantage here is to have a very low inertia of rotating parts.
  • the rotary barrel pumps (FIG. 2): within the pump 1, the plate 2 is fixed and the barrel 6 carrying the pistons 3 is rotated, thus ensuring the movement of the pistons 3 in their shirts 4.
  • the piston 3 - plate 2 connection is provided in the same way as for the first configuration.
  • the advantage of this architecture is that it can easily make the adjustable tray tilt and thus have the possibility of variable displacement.
  • the inertia of the rotating parts increases significantly since the barrel and the set of pistons are rotated.
  • Barrel pumps with swash plate the barrel is fixed in this architecture and we have two plates, a first inclined plate is rotating and transfers to the second plate only the oscillation movement.
  • a first inclined plate is rotating and transfers to the second plate only the oscillation movement.
  • the number and the diameter of the pistons, as well as the inclination of the plate condition the desired flow rate for the pump.
  • the pistons are in turn under high pressure, then at atmospheric pressure, so that the barrel / piston assembly prints a load on the plate whose module is spatially heterogeneous. Indeed, with respect to the intake pipe (atmospheric pressure) the load is relatively low, while compared to the discharge pipe, the load is maximum.
  • the present invention relates to a double barrel pump, double tray and double inlet / discharge, the elements of each of the barrel-tray-inlet-discharge assembly being distributed along a drive shaft so as to to reduce the stresses on the plates and the different mechanical connections, and thus to reduce the risks of rupture.
  • the invention relates to a barrel pump comprising at least one drive shaft, a first pump assembly and a second pump assembly, each pump assembly being formed of elements comprising at least one plate, a cylinder block, a pipe intake and a discharge pipe, said cylinder block comprising at least two circumferentially distributed compression chambers, at least two pistons being in translation respectively in said compression chambers of said cylinder block of each of said sets, said plate of each of said two sets being inclined relative to the axis of rotation of said drive shaft, said drive shaft generating a relative rotational movement between said plate and said cylinder block of each of said two sets.
  • said elements of said second set are distributed symmetrically with respect to said elements of said first set in a plane perpendicular to the axis of rotation of said drive shaft, and said plates of said two sets are interconnected at said plane of symmetry.
  • said inlet and outlet pipes of the same assembly can be placed in symmetry with respect to the axis of said drive shaft,
  • said trays of said two sets can be formed in a single block.
  • said plates of said two sets can be interconnected by connecting means passing through said plane of symmetry.
  • said connecting means may comprise a pivot connection disposed at a point situated substantially at the periphery of said two plates.
  • said relative rotational movement may be a rotational movement of said plate of each of said sets.
  • each of said sets may further comprise a swash plate, said swash plate of each of said sets being in pivot connection with said plate in rotation of said same set.
  • said relative rotational movement may be a rotational movement of said cylinder block of each of said sets.
  • the angle of inclination of said plate of each of said sets relative to the axis of said drive shaft may be between 70 and 90 ° in absolute value.
  • said pump may comprise means for controlling the inclination of said plate of each of said assemblies with respect to the axis of said drive shaft.
  • the invention relates to a use of said barrel pump for a drilling operation, in particular for the injection of drilling muds into a wellbore.
  • Figure 1 already described, illustrates a fixed barrel pump according to the prior art.
  • Figure 2 already described, illustrates a rotary barrel pump according to the prior art.
  • Figure 3 illustrates a pump according to a first embodiment of the invention.
  • FIG. 4 illustrates a pump according to a second embodiment of the invention.
  • the present invention relates to a barrel pump.
  • the purpose of the barrel pump is to pump a fluid (eg water, oil, gas, drilling muds, etc.) by means of a linear displacement of several pistons.
  • a fluid eg water, oil, gas, drilling muds, etc.
  • This type of pump has the advantage of being compact, having interesting mechanical and volumetric efficiencies, an excellent weight / power ratio.
  • the barrel pump according to the invention can be fixed barrel, rotating barrel, or swash plate.
  • the barrel pump according to the invention generally comprises a casing, and within a casing comprises:
  • a drive shaft it is driven in rotation, relative to the housing by an external energy source, including a driving machine (for example thermal or electrical), in particular by means of a transmission (for example a gearbox);
  • a driving machine for example thermal or electrical
  • a transmission for example a gearbox
  • a first set of pumping elements comprising at least one plate, a cylinder block (called a barrel), an intake pipe and a discharge pipe and a second set of pumping elements, comprising at least the same elements the first pumping assembly, the elements of each of these sets being distributed along the drive shaft.
  • a cylinder block comprises at least two compression chambers (also called jackets) distributed circumferentially (in other words the compression chambers are distributed in a circle), and at least two pistons in translation respectively in the chambers of compression. compression, the translation of the pistons within the compression chambers realize the pumping of the fluid.
  • the trays of each set may be substantially disk-shaped. However, the trays can have any shape.
  • each of the two sets is inclined relative to the axis of rotation of said drive shaft.
  • the inclination of the plates affects the stroke of the pistons in the compression chambers and thus determines the displacement of the pump;
  • said drive shaft induces a relative rotational movement between said plate and said cylinder block of each of said two sets.
  • the drive shaft may as well rotate the plate as the barrel;
  • the barrel pump according to the invention comprises, from one end to another, first intake and discharge lines, a first cylinder, a first plate, a second plate, a second cylinder, and second pipes. intake and discharge, all being traversed by a drive shaft.
  • the trays of each of the pumping sets are inclined at the same angle, in absolute value, and face each other.
  • the forces applied to each of the plates by the translational movement of the pistons in each of the compression chambers of each of the cylinder blocks have the same standard but are of opposite direction.
  • the plates of the two sets being interconnected, this configuration makes it possible to reduce the axial loads supported by the plates and by the mechanical links plate-piston.
  • the intake pipe and the discharge pipe of each of the pumping assemblies can be placed symmetrically with respect to the axis of the drive shaft, or in other words the inlet and discharge pipes of one set face each other with respect to the drive shaft.
  • the balance of axial forces at the plateau can be balanced more easily.
  • the drive shaft rotates the trays of each of the two sets, the rotational movement being considered relative to the housing of the pump.
  • this first variant describes a fixed barrel pump.
  • the rotary plate of a given assembly is inclined relative to the drive shaft at the same angle of inclination as the plate of the other assembly, each of the plates being further rotated by the drive shaft.
  • the drive shaft rotates the cylinder or barrel block of each of the two pump assemblies, the rotational movement being considered relative to the pump housing.
  • this second variant describes a rotating barrel pump.
  • the trays of each pumping assembly are fixed and inclined at the same angle of inclination in absolute value.
  • the rotating barrel of each pump assembly induces a translational movement of the pistons in their respective compression chamber, via the connection of the pistons with the plate of their respective pump assembly.
  • each of the two pumping sets comprises at least two plates parallel to each other (and thus both inclined at the same angle at the same moment): a driven rotary plate in rotation by the drive shaft, and a swash plate driven in oscillation by the turntable, the swash plate being pivotally connected to the axis of the turntable relative to the turntable.
  • the turntable transmits only the oscillation movement to the swash plate and does not transmit the rotational movement.
  • the pistons of each of the compression chambers of a given pumping assembly are driven by the oscillating plate of this assembly, for example by means of connecting rods (the rods connect, by means of ball joints, the oscillating plate and the pistons so as to transform the oscillation movement into translational motion of the pistons), and the translation of the pistons within the compression chambers realize the pumping of the fluid.
  • the rotary plate can be driven by the drive shaft by means of a finger ball joint, the position of the finger ball joint determining the inclination of the two plates (rotary and oscillating) by relation to the drive shaft.
  • a finger ball joint is a connection between two elements (here the drive shaft and the turntable), which has four degrees of connection and two degrees of relative movement; only two relative rotations are possible, the three translations and the last rotation being linked. In general, it is a ball with a finger impeding rotation.
  • the trays of the two sets are formed of a single block. This makes it possible to reduce the fragility of the contact between the two plates, and therefore to improve the reliability of the pump according to the invention.
  • the trays of the two sets are interconnected by connecting means.
  • the connection means of the trays of the two sets comprise a pivot connection placed at a point situated substantially at the periphery of the two trays.
  • the pivot links are formed by bearings or bearings, favoring the relative movement of the elements. This pivot connection allows adjustment of the inclination of the trays of each pump assembly.
  • the connection means of the trays of the two assemblies comprise, in addition to a pivot connection, at least one spacing element of variable length placed so as to reinforce the assembly formed by the two inclined plates and interconnected by the pivot connection.
  • the inclination of the tray (s) of each of the assemblies is continuously adjustable by means of control of the inclination of the plates, which allows a variable displacement.
  • the inclination of the trays affects the stroke of the pistons.
  • the pump according to this variant allows good flexibility through the continuous variation of the unit cubic capacity.
  • the pump according to this fourth variant allows a progressive operation of the pump: for example, during startup, the angle of inclination can be low, and subsequently, it can be increased depending on the desired conditions (flow and pressure of the fluid). This increases the reliability of the pump.
  • the plate inclination control means interact with the connecting means connecting the trays of the two pumping sets.
  • the plate inclination control means cooperate with the adjusting the height of the spacer, so as to increase or reduce the spacing between the trays.
  • the means for controlling the inclination of the plates is provided by a worm.
  • the pump according to the invention may comprise, in each cylinder block, a number of pistons of between three and fifteen, preferably between five and eleven. Thus, a large number of pistons provides a continuous flow upstream and downstream of the pump.
  • the angle of inclination of the tray (s) (a turntable in the case of the first variant, a fixed tray in the case of the second variant, or a rotating plate and an oscillating plate in the case of the third variant) of each set of pumping elements is between 70 ° and 90 ° in absolute value with respect to the axis of the drive shaft.
  • the plate or plates of one set is inclined between 0 and 20 ° with respect to the plane of symmetry of the first and second pumping sets, and the plate or trays of the other set is inclined between -20 ° and 0 with respect to this same plane of symmetry.
  • Pump 1 is a rotary barrel type pump.
  • This pump comprises a drive shaft 12, which is rotatably mounted in a housing (not shown).
  • the rotation of the drive shaft 12 is performed by an external source not shown, for example an electric machine and a gearbox.
  • the pump 1 comprises two pumping sets distributed symmetrically with respect to each other in a plane of symmetry perpendicular to the axis of rotation of the shaft.
  • the first (respectively second) set comprises a fixed plate 2 (respectively 3), a cylinder (or cylinder block) rotating 4 (respectively 5), an intake pipe 8 (respectively 9), a discharge pipe 10 (respectively 1 1).
  • a fixed plate 2 (respectively 3)
  • a cylinder (or cylinder block) rotating 4 (respectively 5)
  • an intake pipe 8 (respectively 9)
  • a discharge pipe 10 (respectively 1 1).
  • the drive shaft 12 drives the barrel 4, 5 of each pump assembly.
  • the trays of each of the pump assemblies are inclined relative to a plane perpendicular to the axis of rotation of the drive shaft of the same angle of inclination in absolute value.
  • the fixed plates 2, 3 of each set of pumping elements are interconnected by a pivot connection 13 and by a spacer element 14 whose length may be variable.
  • FIG. 4 shows a variant of the pump as shown in FIG. 3.
  • the pump according to this nonlimiting embodiment of the pump according to the invention also comprises means for controlling the inclination of the trays. of each pump assembly, in the form of a worm controlling the variable length spacer element.
  • the invention also relates to the use of the pump according to the invention for a drilling operation, in particular for the injection of drilling muds into a wellbore.
  • the pump according to the invention to balance the distribution of axial loads, it is possible to size a pump according to the invention to withstand high pressures and high flow rates. Indeed, this improvement in the distribution of the axial loads can make it possible to multiply the number of pistons to reach the flow desired, and this, with a smaller radial size (pistons in greater numbers and smaller diameter).
  • the pump according to the invention can be sized to operate up to pressures of the order of 1500 bars, that is to say 150 MPa.
  • the pump according to the invention can be sized to operate at flow rates ranging from 30 to 600 m 3 / h.

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  • 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)
  • Fluid Mechanics (AREA)
  • Environmental & Geological Engineering (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Reciprocating Pumps (AREA)

Abstract

The present invention relates to a pump (1) comprising two pump assemblies symmetrically arranged relative to a plane perpendicular to the axis of a drive shaft (12), each pump assembly comprising a cylinder (4, 5), a plate (2, 3), an intake pipe (8, 9) and a discharge pipe (10, 11), the plates (2, 3) of each assembly being interconnected at the plane of symmetry.

Description

POMPE A DOUBLE PLATEAU ET DOUBLE BARILLET  PUMP WITH DOUBLE TRAY AND DOUBLE BARREL
La présente invention concerne le domaine des pompes, en particulier pour le pompage haute pression et haut débit, notamment pour des opérations de forage allant de quelques centaines de mètres à quelques kilomètres. The present invention relates to the field of pumps, in particular for high pressure and high flow pumping, in particular for drilling operations ranging from a few hundred meters to a few kilometers.
Dans le domaine de la production d'hydrocarbures, on observe actuellement que les forages doivent atteindre des profondeurs de plus en plus importantes, ce qui implique de travailler avec des pressions d'injection toujours plus élevées. Les compagnies pétrolières et les sociétés de service dans le domaine pétrolier ont donc besoin de pompes (par exemple pour l'injection de boues de forage) à très haute pression pour atteindre les profondeurs requises. Ces dernières doivent également être fiables, économiques, flexibles et compactes, afin de répondre aux demandes toujours plus exigeantes du secteur de l'énergie. In the field of hydrocarbon production, it is currently observed that drilling must reach deeper and deeper depths, which means working with ever higher injection pressures. Oil companies and service companies in the oil field therefore need pumps (eg for the injection of drilling muds) at very high pressure to reach the required depths. The latter must also be reliable, economical, flexible and compact, in order to meet the ever more demanding demands of the energy sector.
De manière générale, les pompes à vilebrequins sont les plus répandues dans l'ensemble des secteurs de l'industrie : les biens d'équipement, les industries pétrolière, gazière et agroalimentaire, le secteur automobile, le bâtiment (chauffage, puits, climatisation, pompes à eau, etc.) et plus spécifiquement pour le traitement de l'eau et des déchets (réseau d'eau et d'assainissement). A ce jour, les pompes de ce type comportent un nombre de pistons limités (de l'ordre de 5), en raison des limitations de la taille du vilebrequin qui est soumis par ailleurs à de fortes contraintes et à de brusques variations de pression pouvant intervenir au refoulement. Ces pompes présentent donc des limites en termes de puissance, de couple pression / débit (limité par des « coups de bélier » générés par la pression sinusoïdale du vilebrequin), de poids, de rendement et de durée de vie. De plus, elles ne permettent pas d'avoir une cylindrée variable et manquent donc de flexibilité d'utilisation. In general, crankshaft pumps are the most widespread in all sectors of the industry: capital goods, oil, gas and agri-food industries, the automotive sector, construction (heating, wells, air conditioning, water pumps, etc.) and more specifically for the treatment of water and waste (water and sanitation network). To date, pumps of this type have a limited number of pistons (of the order of 5), because of the limitations of the size of the crankshaft which is also subject to high stresses and sudden changes in pressure that can intervene in repression. These pumps therefore have limits in terms of power, torque pressure / flow (limited by "water hammer" generated by the sinusoidal pressure of the crankshaft), weight, yield and service life. In addition, they do not allow to have a variable displacement and therefore lack flexibility of use.
Une autre technologie de pompe volumétrique est la pompe à barillet, appelée également pompe à plateau. Pour ce type de pompe, les pistons sont répartis sur un cercle, contrairement aux pompes à vilebrequin pour lesquelles les pistons sont alignés. Les pompes conçues avec un barillet, fonctionnent à l'aide d'un système de plateau ou d'un barillet tournant, qui actionne les différents pistons les uns à la suite des autres. Lorsqu'un piston est en phase d'admission, le piston opposé est en mode refoulement, ce qui offre un flux constant en amont et aval de la pompe. La répartition des positions des pistons avec un guidage par le barillet assure une distribution progressive des efforts lors de la rotation de l'arbre entraîné par le moteur. Majoritairement destinées au pompage à plus faible pression et débit (elles sont principalement utilisées dans le pompage des huiles hydrauliques), elles offrent de nombreux avantages : Another volumetric pump technology is the barrel pump, also called a plateau pump. For this type of pump, the pistons are distributed on a circle, unlike the crankshaft pumps for which the pistons are aligned. Pumps designed with a barrel, operate using a tray system or a rotating barrel, which actuates the various pistons one after the other. When a piston is in the intake phase, the opposite piston is in discharge mode, which provides a constant flow upstream and downstream of the pump. The distribution of the positions of the pistons with a guide by the barrel ensures a progressive distribution of forces during the rotation of the shaft driven by the engine. Mainly intended for pumping at lower pressure and flow (they are mainly used in the pumping of hydraulic oils), they offer many advantages:
Excellent rapport poids / puissance  Excellent weight / power ratio
- Très bon rapport qualité / prix  - Very good value for money
Rendements mécaniques et volumétriques intéressants  Interesting mechanical and volumetric efficiencies
Possibilité de cylindrée variable en réglant l'inclinaison du plateau.  Possibility of variable displacement by adjusting the inclination of the plate.
De manière générale, il existe trois grandes architectures de pompe à barillet : In general, there are three major architectures of barrel pumps:
Les pompes à barillet fixe (figure 1 ) : dans cette configuration de pompe 1 , où le barillet est fixe, c'est le plateau incliné 2 qui tourne (entraîné par l'arbre 5) afin de générer le mouvement des pistons 3 dans leurs chemises 4. La liaison entre les pistons 3 et le plateau 2 est alors assuré par des patins rotulés qui frottent sur le plateau 2. L'avantage ici est d'avoir une très faible inertie des pièces en rotation. Les pompes à barillet rotatif (figure 2) : au sein de la pompe 1 , c'est le plateau 2 qui est fixe et le barillet 6 portant les pistons 3 est en rotation, assurant ainsi le mouvement des pistons 3 dans leurs chemises 4. La liaison piston 3 - plateau 2 est assurée de la même manière que pour la première configuration. L'avantage de cette architecture est que l'on peut aisément rendre le plateau réglable en inclinaison et ainsi avoir la possibilité de cylindrée variable. En revanche, l'inertie des pièces en rotation augmente de façon non négligeable puisque le barillet et l'ensemble des pistons sont mis en rotation.  The fixed-barrel pumps (FIG. 1): in this pump configuration 1, where the barrel is fixed, it is the inclined plate 2 which rotates (driven by the shaft 5) in order to generate the movement of the pistons 3 in their 4. The connection between the pistons 3 and the plate 2 is then provided by rotatable pads which rub on the plate 2. The advantage here is to have a very low inertia of rotating parts. The rotary barrel pumps (FIG. 2): within the pump 1, the plate 2 is fixed and the barrel 6 carrying the pistons 3 is rotated, thus ensuring the movement of the pistons 3 in their shirts 4. The piston 3 - plate 2 connection is provided in the same way as for the first configuration. The advantage of this architecture is that it can easily make the adjustable tray tilt and thus have the possibility of variable displacement. On the other hand, the inertia of the rotating parts increases significantly since the barrel and the set of pistons are rotated.
Les pompes à barillet avec plateau oscillant : le barillet est fixe dans cette architecture et l'on a deux plateaux, un premier plateau incliné est en rotation et transfère au second plateau uniquement le mouvement d'oscillation. Ainsi on peut lier les pistons au second plateau oscillant sans la nécessité d'éléments frottant, par exemple avec une bielle liée au piston et au plateau par des liaisons rotules. C'est la seule architecture adaptée au pompage haute pression du fait de l'absence d'éléments frottant (on en trouve d'ailleurs quelques-unes sur le marché de la géothermie). Elle offre également un excellent rendement mécanique.  Barrel pumps with swash plate: the barrel is fixed in this architecture and we have two plates, a first inclined plate is rotating and transfers to the second plate only the oscillation movement. Thus one can bind the pistons to the second swash plate without the need for rubbing elements, for example with a rod connected to the piston and the plate by ball joints. This is the only architecture suitable for high-pressure pumping because of the absence of rubbing elements (some of them are also found on the geothermal market). It also offers excellent mechanical performance.
Dans le cas de telles pompes à barillet, le nombre et le diamètre des pistons, de même que l'inclinaison du plateau, conditionnent le débit souhaité pour la pompe. De fait, lorsque celle-ci fonctionne, les pistons sont tour à tour sous forte pression, puis à pression atmosphérique, de sorte que l'ensemble barillet/piston imprime une charge sur le plateau dont le module est spatialement hétérogène. En effet, au regard de la conduite d'admission (pression atmosphérique) la charge est relativement faible, tandis qu'au regard de la conduite de refoulement, la charge est maximale. In the case of such barrel pumps, the number and the diameter of the pistons, as well as the inclination of the plate, condition the desired flow rate for the pump. In fact, when this works, the pistons are in turn under high pressure, then at atmospheric pressure, so that the barrel / piston assembly prints a load on the plate whose module is spatially heterogeneous. Indeed, with respect to the intake pipe (atmospheric pressure) the load is relatively low, while compared to the discharge pipe, the load is maximum.
Par ailleurs, lorsque des pompes à barillet, qu'elles soient à barillet tournant, à plateau rotatif ou oscillant, sont utilisées dans le domaine du forage très grande profondeur alliant haute pression et haut débit, les efforts appliqués par un nombre important de pistons peuvent engendrer des efforts considérables sur le plateau et les liaisons mécaniques entre les constituants ce qui, dans les conditions extrêmes peut générer une déformation du plateau ou la casse d'une liaison. En outre, les liaisons entre les pistons et le plateau assurées, par exemple, par des patins rotulés, doivent être pensées avec un minimum de frottement.  Moreover, when barrel pumps, whether rotating barrel, rotary table or oscillating, are used in the field of very deep drilling combining high pressure and high flow, the forces applied by a large number of pistons can generate considerable efforts on the plateau and the mechanical connections between the constituents which, in extreme conditions can generate a deformation of the plateau or the breakage of a link. In addition, the connections between the pistons and the plateau ensured, for example, by padded pads, must be designed with a minimum of friction.
Ce déséquilibre de charge appliquée sur le plateau peut induire des efforts importants sur le plateau et sur les liaisons mécaniques du système, ce qui conduit à des pièces plus encombrantes et plus massives rendant la pompe plus énergivore. En outre, les liaisons entre les pistons et le plateau, par exemple par des patins rotulés, peuvent être inconcevables si la charge appliquée est trop importante. On connaît également e brevet CN 103696920 qui décrit une pompe hydraulique comportant deux plateaux et deux barillets avec chacun un jeu de pistons. Selon cette conception, les plateaux sont placés aux extrémités opposées de la pompe et les barillets sont au centre, la pompe ne comportant alors qu'une seule admission et qu'un seul refoulement. Toutefois, une telle pompe implique de dimensionner indépendamment chacun des plateaux, ce qui peut s'avérer difficile dans des applications haute pression et haut débit. De plus, une telle configuration des différents éléments de la pompe ne permet pas un réglage commun de l'inclinaison des plateaux.  This imbalance of load applied to the plate can induce significant forces on the plate and on the mechanical links of the system, which leads to larger and more massive parts making the pump more energy consuming. In addition, the connections between the pistons and the plate, for example by rotatable pads, can be inconceivable if the load applied is too great. Also known is patent CN 103696920 which describes a hydraulic pump comprising two plates and two barrels each with a set of pistons. According to this design, the trays are placed at the opposite ends of the pump and the barrels are in the center, the pump then having only one inlet and one discharge. However, such a pump involves independently dimensioning each of the trays, which can be difficult in high pressure and high speed applications. In addition, such a configuration of the different elements of the pump does not allow a common adjustment of the inclination of the trays.
Pour pallier ces inconvénients, la présente invention concerne une pompe à double barillet, double plateau et double admission/refoulement, les éléments de chacun des ensembles barillet-plateau-admission-refoulement étant distribués le long d'un arbre d'entraînement de manière à réduire les contraintes sur les plateaux et les différentes liaisons mécaniques, et ainsi de réduire les risques de rupture. Le dispositif selon l'invention To overcome these drawbacks, the present invention relates to a double barrel pump, double tray and double inlet / discharge, the elements of each of the barrel-tray-inlet-discharge assembly being distributed along a drive shaft so as to to reduce the stresses on the plates and the different mechanical connections, and thus to reduce the risks of rupture. The device according to the invention
L'invention concerne une pompe à barillet comprenant au moins un arbre d'entraînement, un premier ensemble de pompage et un deuxième ensemble de pompage, chaque ensemble de pompage étant formé d'éléments comprenant au moins un plateau, un bloc cylindre, une conduite d'admission et une conduite de refoulement, ledit bloc cylindre comportant au moins deux chambres de compression réparties circonférentiellement, au moins deux pistons étant en translation respectivement dans lesdites chambres de compression dudit bloc cylindre de chacun desdits ensembles, ledit plateau de chacun desdits deux ensembles étant incliné par rapport à l'axe de rotation dudit arbre d'entraînement, ledit arbre d'entraînement générant un mouvement relatif en rotation entre ledit plateau et ledit bloc cylindre de chacun desdits deux ensembles. The invention relates to a barrel pump comprising at least one drive shaft, a first pump assembly and a second pump assembly, each pump assembly being formed of elements comprising at least one plate, a cylinder block, a pipe intake and a discharge pipe, said cylinder block comprising at least two circumferentially distributed compression chambers, at least two pistons being in translation respectively in said compression chambers of said cylinder block of each of said sets, said plate of each of said two sets being inclined relative to the axis of rotation of said drive shaft, said drive shaft generating a relative rotational movement between said plate and said cylinder block of each of said two sets.
Selon l'invention, lesdits éléments dudit second ensemble sont distribués symétriquement par rapport auxdits éléments dudit premier ensemble selon un plan perpendiculaire à l'axe de rotation dudit arbre d'entraînement, et lesdits plateaux desdits deux ensembles sont reliés entre eux au niveau dudit plan de symétrie.  According to the invention, said elements of said second set are distributed symmetrically with respect to said elements of said first set in a plane perpendicular to the axis of rotation of said drive shaft, and said plates of said two sets are interconnected at said plane of symmetry.
Avantageusement, lesdites conduites d'admission et de refoulement d'un même ensemble peuvent être placées en symétrie par rapport à l'axe dudit arbre d'entraînement, Advantageously, said inlet and outlet pipes of the same assembly can be placed in symmetry with respect to the axis of said drive shaft,
Conformément à une mise en œuvre de l'invention, lesdits plateaux desdits deux ensembles peuvent être formés en un seul bloc. Selon une option de réalisation, lesdits plateaux desdits deux ensembles peuvent être reliés entre eux par des moyens de liaison passant par ledit plan de symétrie. According to one embodiment of the invention, said trays of said two sets can be formed in a single block. According to an embodiment option, said plates of said two sets can be interconnected by connecting means passing through said plane of symmetry.
Selon une mise en œuvre, lesdits moyens de liaison peuvent comprendre une liaison pivot disposée en un point situé sensiblement à la périphérie desdits deux plateaux. According to one embodiment, said connecting means may comprise a pivot connection disposed at a point situated substantially at the periphery of said two plates.
Conformément à une variante de mise en œuvre de l'invention, ledit mouvement relatif en rotation peut être un mouvement en rotation dudit plateau de chacun desdits ensembles. According to an alternative embodiment of the invention, said relative rotational movement may be a rotational movement of said plate of each of said sets.
Conformément à une autre variante de l'invention, chacun desdits ensembles peut comprendre en sus un plateau oscillant, ledit plateau oscillant de chacun desdits ensembles étant en liaison pivot avec ledit plateau en rotation dudit même ensemble. Selon une autre option de mise en œuvre de l'invention, ledit mouvement relatif en rotation peut être un mouvement en rotation dudit bloc cylindre de chacun desdits ensembles. According to another variant of the invention, each of said sets may further comprise a swash plate, said swash plate of each of said sets being in pivot connection with said plate in rotation of said same set. According to another implementation of the invention, said relative rotational movement may be a rotational movement of said cylinder block of each of said sets.
Selon une mise en œuvre, l'angle d'inclinaison dudit plateau de chacun desdits ensembles par rapport à l'axe dudit arbre d'entraînement peut être compris entre 70 et 90° en valeur absolue. Avantageusement, ladite pompe peut comporter des moyens de commande de l'inclinaison dudit plateau de chacun desdits ensembles par rapport à l'axe dudit arbre d'entraînement. According to one embodiment, the angle of inclination of said plate of each of said sets relative to the axis of said drive shaft may be between 70 and 90 ° in absolute value. Advantageously, said pump may comprise means for controlling the inclination of said plate of each of said assemblies with respect to the axis of said drive shaft.
En outre, l'invention concerne une utilisation de ladite pompe à barillet pour une opération de forage, en particulier pour l'injection de boues de forage dans un puits de forage. In addition, the invention relates to a use of said barrel pump for a drilling operation, in particular for the injection of drilling muds into a wellbore.
Présentation succincte des figures Brief presentation of the figures
D'autres caractéristiques et avantages du dispositif selon l'invention, apparaîtront à la lecture de la description ci-après d'exemples non limitatifs de réalisations, en se référant aux figures annexées et décrites ci-après.  Other features and advantages of the device according to the invention will appear on reading the following description of nonlimiting examples of embodiments, with reference to the appended figures and described below.
La figure 1 , déjà décrite, illustre une pompe à barillet fixe selon l'art antérieur.  Figure 1, already described, illustrates a fixed barrel pump according to the prior art.
La figure 2, déjà décrite, illustre une pompe à barillet rotatif selon l'art antérieur.  Figure 2, already described, illustrates a rotary barrel pump according to the prior art.
La figure 3 illustre une pompe selon un premier mode de réalisation de l'invention. Figure 3 illustrates a pump according to a first embodiment of the invention.
La figure 4 illustre une pompe selon un second mode de réalisation de l'invention. FIG. 4 illustrates a pump according to a second embodiment of the invention.
Description détaillée de l'invention Detailed description of the invention
La présente invention concerne une pompe à barillet. La pompe à barillet a pour but de pomper un fluide (par exemple : eau, huile, gaz, boues de forage, etc.) au moyen d'un déplacement linéaire de plusieurs pistons. Ce type de pompe présente l'avantage d'être compacte, d'avoir des rendements mécaniques et volumétriques intéressants, un excellent rapport poids/puissance. La pompe à barillet selon l'invention peut être à barillet fixe, à barillet rotatif, ou bien à plateau oscillant. La pompe à barillet selon l'invention comporte de manière générale un carter, et au sein d'un carter comporte : The present invention relates to a barrel pump. The purpose of the barrel pump is to pump a fluid (eg water, oil, gas, drilling muds, etc.) by means of a linear displacement of several pistons. This type of pump has the advantage of being compact, having interesting mechanical and volumetric efficiencies, an excellent weight / power ratio. The barrel pump according to the invention can be fixed barrel, rotating barrel, or swash plate. The barrel pump according to the invention generally comprises a casing, and within a casing comprises:
- un arbre d'entraînement : celui-ci est entraîné en rotation, par rapport au carter par une source d'énergie extérieure, notamment une machine motrice (par exemple thermique ou électrique), en particulier au moyen d'une transmission (par exemple une boîte de vitesses) ;  - A drive shaft: it is driven in rotation, relative to the housing by an external energy source, including a driving machine (for example thermal or electrical), in particular by means of a transmission (for example a gearbox);
- un premier ensemble d'éléments de pompage, comprenant au moins un plateau, un bloc cylindre (appelé barillet), une conduite d'admission et une conduite de refoulement et un second ensemble d'éléments de pompage, comprenant au moins les mêmes éléments que le premier ensemble de pompage, les éléments de chacun de ces ensembles étant distribués le long de l'arbre d'entraînement. De manière classique, un bloc cylindre comporte au moins deux chambres de compression (appelés également chemises) réparties circonférentiellement (en d'autres termes les chambres de compression sont réparties selon un cercle), et au moins deux pistons en translation respectivement dans les chambres de compression, la translation des pistons au sein des chambres de compression réalisent le pompage du fluide. Les plateaux de chaque ensemble peuvent avoir sensiblement la forme de disque. Toutefois, les plateaux peuvent avoir n'importe quelle forme. Seules les chambres de compression (et les pistons) sont réparties sur un cercle. Par ailleurs, de manière classique, le fluide à pomper passe par la conduite d'admission d'un des ensembles, entre dans une chambre de compression de cet ensemble, est comprimé puis refoulé de la pompe par la conduite de refoulement de cet ensemble.  a first set of pumping elements, comprising at least one plate, a cylinder block (called a barrel), an intake pipe and a discharge pipe and a second set of pumping elements, comprising at least the same elements the first pumping assembly, the elements of each of these sets being distributed along the drive shaft. In a conventional manner, a cylinder block comprises at least two compression chambers (also called jackets) distributed circumferentially (in other words the compression chambers are distributed in a circle), and at least two pistons in translation respectively in the chambers of compression. compression, the translation of the pistons within the compression chambers realize the pumping of the fluid. The trays of each set may be substantially disk-shaped. However, the trays can have any shape. Only the compression chambers (and the pistons) are distributed on a circle. Furthermore, in a conventional manner, the fluid to be pumped through the inlet pipe of one of the assemblies, enters a compression chamber of this assembly, is compressed and discharged from the pump by the discharge pipe of this assembly.
Par ailleurs, selon l'invention : Furthermore, according to the invention:
- le plateau de chacun des deux ensembles est incliné par rapport à l'axe de rotation dudit arbre d'entraînement. L'inclinaison des plateaux influe sur la course des pistons dans les chambres de compression et détermine ainsi la cylindrée de la pompe ;  - The plate of each of the two sets is inclined relative to the axis of rotation of said drive shaft. The inclination of the plates affects the stroke of the pistons in the compression chambers and thus determines the displacement of the pump;
ledit arbre d'entraînement induit un mouvement relatif en rotation entre ledit plateau et ledit bloc cylindre de chacun desdits deux ensembles. Ainsi, selon l'invention, l'arbre d'entraînement peut tout aussi bien entraîner en rotation le plateau que le barillet ;  said drive shaft induces a relative rotational movement between said plate and said cylinder block of each of said two sets. Thus, according to the invention, the drive shaft may as well rotate the plate as the barrel;
- la distribution des éléments du second ensemble est en symétrie par rapport à celle des éléments du premier ensemble selon un plan perpendiculaire à l'axe de rotation de l'arbre d'entraînement, les plateaux des deux ensembles étant reliés entre eux au niveau du plan de symétrie. Ainsi, la pompe à barillet selon l'invention comporte, d'une extrémité à une autre, des premières conduites d'admission et de refoulement, un premier barillet, un premier plateau, un deuxième plateau, un deuxième barillet, et des deuxièmes conduites d'admission et de refoulement, le tout étant traversé par un arbre d'entraînement. the distribution of the elements of the second set is in symmetry with respect to that of the elements of the first set in a plane perpendicular to the axis of rotation of the drive shaft, the plates of the two sets being connected between them at the plane of symmetry. Thus, the barrel pump according to the invention comprises, from one end to another, first intake and discharge lines, a first cylinder, a first plate, a second plate, a second cylinder, and second pipes. intake and discharge, all being traversed by a drive shaft.
Ainsi, selon l'invention les plateaux de chacun des ensembles de pompage sont inclinés d'un même angle, en valeur absolue, et se font face. Les forces appliquées sur chacun des plateaux par le mouvement en translation des pistons dans chacune des chambres de compression de chacun des blocs cylindre ont la même norme mais sont de sens opposé. Les plateaux des deux ensembles étant reliés entre eux, cette configuration permet de réduire les charges axiales supportées par les plateaux et par les liaisons mécaniques plateau-piston. Avantageusement, la conduite d'admission et la conduite de refoulement de chacun des ensembles de pompage peuvent être placées en symétrie par rapport à l'axe de l'arbre d'entraînement, ou autrement dit les conduites d'admission et de refoulement d'un même ensemble se font face par rapport à l'arbre d'entraînement. Ainsi, le bilan des forces axiales au niveau du plateau peut être équilibré plus facilement. Thus, according to the invention the trays of each of the pumping sets are inclined at the same angle, in absolute value, and face each other. The forces applied to each of the plates by the translational movement of the pistons in each of the compression chambers of each of the cylinder blocks have the same standard but are of opposite direction. The plates of the two sets being interconnected, this configuration makes it possible to reduce the axial loads supported by the plates and by the mechanical links plate-piston. Advantageously, the intake pipe and the discharge pipe of each of the pumping assemblies can be placed symmetrically with respect to the axis of the drive shaft, or in other words the inlet and discharge pipes of one set face each other with respect to the drive shaft. Thus, the balance of axial forces at the plateau can be balanced more easily.
Selon une première variante de mise en œuvre de l'invention, l'arbre d'entraînement entraîne en rotation les plateaux de chacun des deux ensembles, le mouvement en rotation étant considéré par rapport au carter de la pompe. Ainsi, cette première variante décrit une pompe à barillet fixe. Selon cette variante, le plateau rotatif d'un ensemble donné est incliné par rapport à l'arbre d'entraînement selon un même angle d'inclinaison que le plateau de l'autre ensemble, chacun des plateaux étant par ailleurs entraîné en rotation par l'arbre d'entraînement. According to a first alternative embodiment of the invention, the drive shaft rotates the trays of each of the two sets, the rotational movement being considered relative to the housing of the pump. Thus, this first variant describes a fixed barrel pump. According to this variant, the rotary plate of a given assembly is inclined relative to the drive shaft at the same angle of inclination as the plate of the other assembly, each of the plates being further rotated by the drive shaft.
Selon une deuxième variante de mise en œuvre de l'invention, l'arbre d'entraînement entraîne en rotation le bloc cylindre ou barillet de chacun des deux ensembles de pompage, le mouvement en rotation étant considéré par rapport au carter de la pompe. Ainsi, cette seconde variante décrit une pompe à barillet tournant. Selon cette variante, les plateaux de chaque ensemble de pompage sont fixes et inclinés du même angle d'inclinaison en valeur absolue. Pour cette variante, le barillet tournant de chaque ensemble de pompage induit un mouvement en translation des pistons dans leur chambre de compression respective, via la liaison des pistons avec le plateau de leur ensemble de pompage respectif. Selon une troisième variante de mise en œuvre de l'invention, chacun des deux ensembles de pompage comprend au moins deux plateaux parallèles entre eux (et de ce fait tout deux inclinés d'un même angle à un même instant) : un plateau rotatif entraîné en rotation par l'arbre d'entraînement, et un plateau oscillant entraîné en oscillation par le plateau rotatif, le plateau oscillant étant en liaison pivot selon l'axe du plateau rotatif par rapport au plateau rotatif. Ainsi, selon cette variante, le plateau rotatif transmet uniquement le mouvement d'oscillation au plateau oscillant et ne transmet pas le mouvement de rotation. Selon cette conception, les pistons de chacune des chambres de compression d'un ensemble de pompage donné sont entraînés par le plateau oscillant de cet ensemble, par exemple au moyen de bielles (les bielles relient, au moyen de liaisons rotules, le plateau oscillant et les pistons de manière à transformer le mouvement d'oscillation en mouvement de translation des pistons), et la translation des pistons au sein des chambres de compression réalisent le pompage du fluide. Selon cette variante de l'invention, le plateau rotatif peut être entraîné par l'arbre d'entraînement au moyen d'une rotule à doigt, la position de la rotule à doigt déterminant l'inclinaison des deux plateaux (rotatif et oscillant) par rapport à l'arbre d'entraînement. On rappelle qu'une liaison rotule à doigt est une liaison entre deux éléments (ici l'arbre d'entraînement et le plateau rotatif), qui dispose de quatre degrés de liaisons et deux degrés de mouvements relatifs ; seulement deux rotations relatives sont possibles, les trois translations et la dernière rotation étant liées. D'une manière générale, il s'agit d'une rotule dotée d'un doigt faisant obstacle à une rotation. According to a second variant of implementation of the invention, the drive shaft rotates the cylinder or barrel block of each of the two pump assemblies, the rotational movement being considered relative to the pump housing. Thus, this second variant describes a rotating barrel pump. According to this variant, the trays of each pumping assembly are fixed and inclined at the same angle of inclination in absolute value. For this variant, the rotating barrel of each pump assembly induces a translational movement of the pistons in their respective compression chamber, via the connection of the pistons with the plate of their respective pump assembly. According to a third alternative embodiment of the invention, each of the two pumping sets comprises at least two plates parallel to each other (and thus both inclined at the same angle at the same moment): a driven rotary plate in rotation by the drive shaft, and a swash plate driven in oscillation by the turntable, the swash plate being pivotally connected to the axis of the turntable relative to the turntable. Thus, according to this variant, the turntable transmits only the oscillation movement to the swash plate and does not transmit the rotational movement. According to this design, the pistons of each of the compression chambers of a given pumping assembly are driven by the oscillating plate of this assembly, for example by means of connecting rods (the rods connect, by means of ball joints, the oscillating plate and the pistons so as to transform the oscillation movement into translational motion of the pistons), and the translation of the pistons within the compression chambers realize the pumping of the fluid. According to this variant of the invention, the rotary plate can be driven by the drive shaft by means of a finger ball joint, the position of the finger ball joint determining the inclination of the two plates (rotary and oscillating) by relation to the drive shaft. It is recalled that a finger ball joint is a connection between two elements (here the drive shaft and the turntable), which has four degrees of connection and two degrees of relative movement; only two relative rotations are possible, the three translations and the last rotation being linked. In general, it is a ball with a finger impeding rotation.
Selon une réalisation de l'invention pouvant s'appliquer pour l'une quelconque des variantes décrites ci-dessus, les plateaux des deux ensembles sont formés d'un seul bloc. Cela permet de réduire la fragilité du contact entre les deux plateaux, et donc d'améliorer la fiabilité de la pompe selon l'invention. According to one embodiment of the invention that can be applied for any of the variants described above, the trays of the two sets are formed of a single block. This makes it possible to reduce the fragility of the contact between the two plates, and therefore to improve the reliability of the pump according to the invention.
Selon une réalisation de l'invention pouvant s'appliquer pour l'une quelconque des variantes décrites ci-dessus, les plateaux des deux ensembles sont reliés entre eux par des moyens de liaison. Avantageusement, les moyens de liaisons des plateaux des deux ensembles comprennent une liaison pivot placée en un point situé sensiblement à la périphérie des deux plateaux. Classiquement, les liaisons pivots sont formées par des paliers ou des roulements, favorisant le mouvement relatif des éléments. Cette liaison pivot permet un réglage de l'inclinaison des plateaux de chaque ensemble de pompage. Préférentiellement, les moyens de liaisons des plateaux des deux ensembles comprennent, en plus d'une liaison pivot, au moins un élément d'écartement à longueur variable placé de manière à renforcer l'ensemble formé par les deux plateaux inclinés et reliés entre eux par la liaison pivot. Avantageusement, l'inclinaison du ou des plateaux de chacun des ensembles est réglable de manière continue par des moyens de commande de l'inclinaison des plateaux, ce qui permet une cylindrée variable. En effet, l'inclinaison des plateaux influe sur la course des pistons. Ainsi, la pompe selon cette variante permet une bonne flexibilité grâce à la variation continue de la cylindrée unitaire. En outre, la pompe selon cette quatrième variante permet une mise en fonctionnement progressive de la pompe : par exemple, lors du démarrage, l'angle d'inclinaison peut être faible, et par la suite, il peut être augmenté en fonction des conditions souhaitées (débit et pression du fluide). Ceci permet d'accroitre la fiabilité de la pompe. Selon un exemple de réalisation, les moyens de commande de l'inclinaison des plateaux interagissent avec les moyens de liaison reliant les plateaux des deux ensembles de pompage. Selon une option de réalisation de l'invention dans laquelle les moyens de liaison comprennent une liaison pivot et un élément d'écartement à hauteur variable tels que décrits ci-dessus, les moyens de commande de l'inclinaison des plateaux coopèrent avec les moyens de réglage de la hauteur de l'élément d'écartement, de manière à augmenter ou réduire l'écartement entre les plateaux. Selon une option de réalisation de l'invention, les moyens de commande de l'inclinaison des plateaux est assurée par une vis sans fin. Selon une mise en œuvre de l'invention, la pompe selon l'invention peut comporter, dans chaque bloc cylindre, un nombre de pistons compris entre trois et quinze, de préférence entre cinq et onze. Ainsi, un nombre élevé de pistons offre un flux continu en amont et en aval de la pompe. Selon un mode de réalisation de l'invention pouvant être appliqué à l'une quelconque des variantes décrites ci-dessus, l'angle d'inclinaison du ou des plateaux (un plateau rotatif dans le cas de la première variante, un plateau fixe dans le cas de la deuxième variante, ou un plateau rotatif et un plateau oscillant dans le cas de la troisième variante) de chaque ensemble d'éléments de pompage est compris entre 70° et 90° en valeur absolue par rapport à l'axe de l'arbre d'entraînement. Autrement dit, le ou les plateaux d'un des ensembles est incliné entre 0 et 20° par rapport au plan de symétrie des premier et deuxième ensembles de pompage, et le ou les plateaux de l'autre ensemble est incliné entre -20° et 0 par rapport à ce même plan de symétrie. La figure 3 présente, de manière illustrative et non limitative, une coupe passant par l'axe de rotation de l'arbre d'entraînement d'une pompe à barillet selon un mode de réalisation de l'invention. La pompe 1 selon ce mode de réalisation illustré est une pompe de type à barillet tournant. Cette pompe comporte un arbre d'entraînement 12, qui est monté en rotation dans un carter (non représenté). La rotation de l'arbre d'entraînement 12 est réalisée par une source extérieure non représentée, par exemple une machine électrique et une boîte de vitesses. La pompe 1 comporte deux ensembles de pompage répartis symétriquement l'un par rapport à l'autre selon un plan de symétrie perpendiculaire à l'axe de rotation de l'arbre. Le premier (respectivement second) ensemble comprend un plateau fixe 2 (respectivement 3), un barillet (ou bloc cylindre) tournant 4 (respectivement 5), une conduite d'admission 8 (respectivement 9), une conduite de refoulement 10 (respectivement 1 1 ). Sur cette figure, sont représentés deux pistons 6, 7 par bloc cylindre, ces pistons étant disposés au sein de leur chambre de compression respective et étant reliés à leur plateau respectif par un patin rotulé. L'arbre d'entraînement 12 entraîne le barillet 4, 5 de chaque ensemble de pompage. Les plateaux de chacun des ensembles de pompage sont inclinés par rapport à un plan perpendiculaire à l'axe de rotation de l'arbre d'entraînement d'un même angle d'inclinaison en valeur absolue. Selon cette mise en œuvre de l'invention, les plateaux fixes 2, 3 de chaque ensemble d'éléments de pompage sont liés entre eux par une liaison pivot 13 et par un élément d'écartement 14 dont la longueur peut être variable. Ainsi, les plateaux se faisant directement face et subissant la même contrainte mais dans des sens opposés, il est clair que les charges axiales sur le plateau et sur les liaisons mécaniques plateau-piston sont réduites. According to one embodiment of the invention that can be applied for any of the variants described above, the trays of the two sets are interconnected by connecting means. Advantageously, the connection means of the trays of the two sets comprise a pivot connection placed at a point situated substantially at the periphery of the two trays. Conventionally, the pivot links are formed by bearings or bearings, favoring the relative movement of the elements. This pivot connection allows adjustment of the inclination of the trays of each pump assembly. Preferably, the connection means of the trays of the two assemblies comprise, in addition to a pivot connection, at least one spacing element of variable length placed so as to reinforce the assembly formed by the two inclined plates and interconnected by the pivot connection. Advantageously, the inclination of the tray (s) of each of the assemblies is continuously adjustable by means of control of the inclination of the plates, which allows a variable displacement. Indeed, the inclination of the trays affects the stroke of the pistons. Thus, the pump according to this variant allows good flexibility through the continuous variation of the unit cubic capacity. In addition, the pump according to this fourth variant allows a progressive operation of the pump: for example, during startup, the angle of inclination can be low, and subsequently, it can be increased depending on the desired conditions (flow and pressure of the fluid). This increases the reliability of the pump. According to an exemplary embodiment, the plate inclination control means interact with the connecting means connecting the trays of the two pumping sets. According to an embodiment of the invention in which the connecting means comprise a pivot connection and a variable height spacer element as described above, the plate inclination control means cooperate with the adjusting the height of the spacer, so as to increase or reduce the spacing between the trays. According to an embodiment of the invention, the means for controlling the inclination of the plates is provided by a worm. According to one embodiment of the invention, the pump according to the invention may comprise, in each cylinder block, a number of pistons of between three and fifteen, preferably between five and eleven. Thus, a large number of pistons provides a continuous flow upstream and downstream of the pump. According to one embodiment of the invention that can be applied to any of the variants described above, the angle of inclination of the tray (s) (a turntable in the case of the first variant, a fixed tray in the case of the second variant, or a rotating plate and an oscillating plate in the case of the third variant) of each set of pumping elements is between 70 ° and 90 ° in absolute value with respect to the axis of the drive shaft. In other words, the plate or plates of one set is inclined between 0 and 20 ° with respect to the plane of symmetry of the first and second pumping sets, and the plate or trays of the other set is inclined between -20 ° and 0 with respect to this same plane of symmetry. FIG. 3 shows, in an illustrative and nonlimiting manner, a section passing through the axis of rotation of the drive shaft of a barrel pump according to one embodiment of the invention. Pump 1 according to this illustrated embodiment is a rotary barrel type pump. This pump comprises a drive shaft 12, which is rotatably mounted in a housing (not shown). The rotation of the drive shaft 12 is performed by an external source not shown, for example an electric machine and a gearbox. The pump 1 comprises two pumping sets distributed symmetrically with respect to each other in a plane of symmetry perpendicular to the axis of rotation of the shaft. The first (respectively second) set comprises a fixed plate 2 (respectively 3), a cylinder (or cylinder block) rotating 4 (respectively 5), an intake pipe 8 (respectively 9), a discharge pipe 10 (respectively 1 1). In this figure, are represented two pistons 6, 7 per cylinder block, these pistons being disposed within their respective compression chamber and being connected to their respective plate by a swivel pad. The drive shaft 12 drives the barrel 4, 5 of each pump assembly. The trays of each of the pump assemblies are inclined relative to a plane perpendicular to the axis of rotation of the drive shaft of the same angle of inclination in absolute value. According to this implementation of the invention, the fixed plates 2, 3 of each set of pumping elements are interconnected by a pivot connection 13 and by a spacer element 14 whose length may be variable. Thus, the trays being directly opposite and undergoing the same stress but in opposite directions, it is clear that the axial loads on the plate and on the mechanical links plate-piston are reduced.
La figure 4 présente une variante de la pompe telle que présentée en la figure 3. En effet, la pompe selon cet exemple non limitatif de réalisation de la pompe selon l'invention comporte en sus des moyens de commande de l'inclinaison des plateaux 15 de chaque ensemble de pompage, sous la forme d'une vis sans fin commandant l'élément d'écartement à longueur variable. FIG. 4 shows a variant of the pump as shown in FIG. 3. In fact, the pump according to this nonlimiting embodiment of the pump according to the invention also comprises means for controlling the inclination of the trays. of each pump assembly, in the form of a worm controlling the variable length spacer element.
L'invention concerne également l'utilisation de la pompe selon l'invention pour une opération de forage, en particulier pour l'injection de boues de forage dans un puits de forage. En effet, la pompe selon l'invention permettant d'équilibrer la répartition des charges axiales, il est possible de dimensionner une pompe selon l'invention de manière à résister aux hautes pressions et aux hauts débits. En effet, cette amélioration de la répartition des charges axiales peut permettre de multiplier le nombre de pistons pour atteindre le débit souhaité, et ce, avec un encombrement radial plus faible (pistons en plus grand nombre et de plus petit diamètre). Par exemple la pompe selon l'invention peut être dimensionnée pour fonctionner jusqu'à des pressions de l'ordre de 1500 bars, c'est-à-dire 150 MPa. En outre, la pompe selon l'invention peut être dimensionnée pour fonctionner à des débits variant de 30 à 600 m3/h. The invention also relates to the use of the pump according to the invention for a drilling operation, in particular for the injection of drilling muds into a wellbore. Indeed, the pump according to the invention to balance the distribution of axial loads, it is possible to size a pump according to the invention to withstand high pressures and high flow rates. Indeed, this improvement in the distribution of the axial loads can make it possible to multiply the number of pistons to reach the flow desired, and this, with a smaller radial size (pistons in greater numbers and smaller diameter). For example, the pump according to the invention can be sized to operate up to pressures of the order of 1500 bars, that is to say 150 MPa. In addition, the pump according to the invention can be sized to operate at flow rates ranging from 30 to 600 m 3 / h.

Claims

Revendications claims
1 ) Pompe à barillet (1 ) comprenant au moins un arbre d'entraînement (12), un premier ensemble de pompage et un deuxième ensemble de pompage, chaque ensemble de pompage étant formé d'éléments comprenant au moins un plateau (2, 3), un bloc cylindre (4, 5), une conduite d'admission (8, 9) et une conduite de refoulement (10, 1 1 ), ledit bloc cylindre (4, 5) comportant au moins deux chambres de compression réparties circonférentiellement, au moins deux pistons (6, 7) étant en translation respectivement dans lesdites chambres de compression dudit bloc cylindre (4, 5) de chacun desdits ensembles, ledit plateau (2, 3) de chacun desdits deux ensembles étant incliné par rapport à l'axe de rotation dudit arbre d'entraînement (12), ledit arbre d'entraînement (12) générant un mouvement relatif en rotation entre ledit plateau (2, 3) et ledit bloc cylindre (4, 5) de chacun desdits deux ensembles, caractérisé en ce que lesdits éléments dudit second ensemble sont distribués symétriquement par rapport auxdits éléments dudit premier ensemble selon un plan perpendiculaire à l'axe de rotation dudit arbre d'entraînement (12), et en ce que lesdits plateaux (2, 3) desdits deux ensembles sont reliés entre eux au niveau dudit plan de symétrie. 1) Barrel pump (1) comprising at least one drive shaft (12), a first pump assembly and a second pump assembly, each pump assembly being formed of elements comprising at least one plate (2, 3 ), a cylinder block (4, 5), an inlet pipe (8, 9) and a discharge pipe (10, 1 1), said cylinder block (4, 5) having at least two circumferentially distributed compression chambers at least two pistons (6, 7) being in translation respectively in said compression chambers of said cylinder block (4, 5) of each of said sets, said plate (2, 3) of each of said two sets being inclined with respect to the axis of rotation of said drive shaft (12), said drive shaft (12) generating a relative rotational movement between said plate (2, 3) and said cylinder block (4, 5) of each of said two assemblies, characterized in that said elements of said second set are distributed sym and in that said trays (2, 3) of said two assemblies are interconnected at said level of said plane, in a direction perpendicular to the axis of rotation of said first drive shaft (12); symmetry.
2) Pompe selon la revendication 1 , dans laquelle lesdites conduites d'admission (8, 9) et de refoulement (10, 1 1 ) d'un même ensemble sont placées en symétrie par rapport à l'axe dudit arbre d'entraînement (12). 2) Pump according to claim 1, wherein said inlet (8, 9) and discharge (10, 1 1) of the same set are placed in symmetry with respect to the axis of said drive shaft ( 12).
3) Pompe selon l'une des revendications précédentes, dans laquelle ladite pompe (1 ) comporte des moyens de commande (15) de l'inclinaison dudit plateau (2, 3) de chacun desdits ensembles par rapport à l'axe dudit arbre d'entraînement (12). 3) Pump according to one of the preceding claims, wherein said pump (1) comprises control means (15) of the inclination of said plate (2, 3) of each of said sets relative to the axis of said shaft of drive (12).
4) Pompe selon l'une des revendications 1 ou 2, dans laquelle lesdits plateaux (2, 3) desdits deux ensembles sont formés en un seul bloc. 5) Pompe selon l'une des revendications 1 à 3, dans laquelle lesdits plateaux (2, 3) desdits deux ensembles sont reliés entre eux par des moyens de liaison (13, 14) passant par ledit plan de symétrie. 4) Pump according to one of claims 1 or 2, wherein said plates (2, 3) of said two sets are formed in one block. 5) Pump according to one of claims 1 to 3, wherein said plates (2, 3) of said two sets are interconnected by connecting means (13, 14) passing through said plane of symmetry.
6) Pompe selon la revendication 5, dans laquelle lesdits moyens de liaison (13, 14) comprennent une liaison pivot (13) disposée en un point situé sensiblement à la périphérie desdits deux plateaux (2, 3). 7) Pompe selon l'une des revendications précédentes, dans laquelle ledit mouvement relatif en rotation est un mouvement en rotation dudit plateau (2, 3) de chacun desdits ensembles. 8) Pompe selon la revendication 7, dans laquelle chacun desdits ensembles comprend en sus un plateau oscillant, ledit plateau oscillant de chacun desdits ensembles étant en liaison pivot avec ledit plateau en rotation (2, 3) dudit même ensemble. 6) Pump according to claim 5, wherein said connecting means (13, 14) comprise a pivot connection (13) disposed at a point substantially at the periphery of said two plates (2, 3). 7) Pump according to one of the preceding claims, wherein said relative rotational movement is a rotational movement of said plate (2, 3) of each of said sets. 8) Pump according to claim 7, wherein each of said sets further comprises a swash plate, said swash plate of each of said sets being in pivot connection with said rotating plate (2, 3) of said set.
9) Pompe selon l'une des revendications 1 à 6, dans laquelle ledit mouvement relatif en rotation est un mouvement en rotation dudit bloc cylindre (4, 5) de chacun desdits ensembles. 9) Pump according to one of claims 1 to 6, wherein said relative rotational movement is a rotational movement of said cylinder block (4, 5) of each of said sets.
10) Pompe selon l'une des revendications précédentes, dans laquelle l'angle d'inclinaison dudit plateau (2, 3) de chacun desdits ensembles par rapport à l'axe dudit arbre d'entraînement (12) est compris entre 70 et 90° en valeur absolue. 10) Pump according to one of the preceding claims, wherein the angle of inclination of said plate (2, 3) of each of said sets relative to the axis of said drive shaft (12) is between 70 and 90 ° in absolute value.
1 1 ) Utilisation de ladite pompe à barillet selon l'une des revendications précédentes pour une opération de forage, en particulier pour l'injection de boues de forage dans un puits de forage. 1 1) Use of said pump barrel according to one of the preceding claims for a drilling operation, in particular for the injection of drilling muds in a wellbore.
PCT/EP2018/055359 2017-03-23 2018-03-05 Double-plate and double-cylinder pump WO2018172050A1 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
US16/496,282 US20210108622A1 (en) 2017-03-23 2018-03-05 Double-plate and double-cylinder pump
EP18708691.3A EP3601796B1 (en) 2017-03-23 2018-03-05 Double-plate and double-cylinder pump
CN201880019925.7A CN110462211A (en) 2017-03-23 2018-03-05 The pump of double plate and twin-tub
CA3056167A CA3056167A1 (en) 2017-03-23 2018-03-05 Double-plate and double-cylinder pump

Applications Claiming Priority (2)

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FR1752410 2017-03-23
FR1752410A FR3064314B1 (en) 2017-03-23 2017-03-23 PUMP WITH DOUBLE TRAY AND DOUBLE BARREL

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WO2018172050A1 true WO2018172050A1 (en) 2018-09-27

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US (1) US20210108622A1 (en)
EP (1) EP3601796B1 (en)
CN (1) CN110462211A (en)
CA (1) CA3056167A1 (en)
FR (1) FR3064314B1 (en)
WO (1) WO2018172050A1 (en)

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US1019521A (en) * 1910-04-18 1912-03-05 Universal Speed Control Company Pump.
GB827589A (en) * 1955-04-26 1960-02-10 Fairey Aviat Co Ltd Improvements relating to two-stage hydraulic fluid pumps
US4478557A (en) * 1982-03-05 1984-10-23 Messier-Hispano-Bugatti(S.A.) Hydraulic power transducer
WO2000050773A2 (en) * 1999-02-23 2000-08-31 2 M Double displacement pump
CN103696920A (en) 2013-12-08 2014-04-02 浙江沃尔液压科技有限公司 Coupled high-pressure plunger pump

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CA2861129C (en) * 2012-02-01 2019-08-20 Laird BATEHAM Hydroelectric power system and pump

Patent Citations (5)

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Publication number Priority date Publication date Assignee Title
US1019521A (en) * 1910-04-18 1912-03-05 Universal Speed Control Company Pump.
GB827589A (en) * 1955-04-26 1960-02-10 Fairey Aviat Co Ltd Improvements relating to two-stage hydraulic fluid pumps
US4478557A (en) * 1982-03-05 1984-10-23 Messier-Hispano-Bugatti(S.A.) Hydraulic power transducer
WO2000050773A2 (en) * 1999-02-23 2000-08-31 2 M Double displacement pump
CN103696920A (en) 2013-12-08 2014-04-02 浙江沃尔液压科技有限公司 Coupled high-pressure plunger pump

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CN110462211A (en) 2019-11-15
EP3601796A1 (en) 2020-02-05
CA3056167A1 (en) 2018-09-27
FR3064314A1 (en) 2018-09-28
FR3064314B1 (en) 2019-07-05
US20210108622A1 (en) 2021-04-15
EP3601796B1 (en) 2021-10-27

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