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 OR ROCK DRILLING; MINING
  • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
  • E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
  • E21B21/08—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)

Applications Claiming Priority (2)

Publications (2)

Family

ID=59031136

Family Applications (1)

Country Status (6)

Family Cites Families (6)

• 2017
  • 2017-03-23 FR FR1752410A patent/FR3064314B1/fr active Active
• 2018
  • 2018-03-05 WO PCT/EP2018/055359 patent/WO2018172050A1/fr unknown
  • 2018-03-05 CA CA3056167A patent/CA3056167A1/fr not_active Abandoned
  • 2018-03-05 EP EP18708691.3A patent/EP3601796B1/de active Active
  • 2018-03-05 CN CN201880019925.7A patent/CN110462211A/zh active Pending
  • 2018-03-05 US US16/496,282 patent/US20210108622A1/en not_active Abandoned

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