EP3797223B1 - Statorelement einer exzenterschneckenpumpe und exzenterschneckenpumpe - Google Patents

Statorelement einer exzenterschneckenpumpe und exzenterschneckenpumpe Download PDF

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Publication number
EP3797223B1
EP3797223B1 EP19730401.7A EP19730401A EP3797223B1 EP 3797223 B1 EP3797223 B1 EP 3797223B1 EP 19730401 A EP19730401 A EP 19730401A EP 3797223 B1 EP3797223 B1 EP 3797223B1
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EP
European Patent Office
Prior art keywords
stator element
relief
stator
cylindrical portion
tube
Prior art date
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Active
Application number
EP19730401.7A
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English (en)
French (fr)
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EP3797223A1 (de
Inventor
Pierre Garnier
Eric OGER
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
PCM Technologies SAS
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PCM Technologies SAS
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2/00—Rotary-piston machines or pumps
    • F04C2/08—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
    • F04C2/10—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member
    • F04C2/107—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member with helical teeth
    • F04C2/1071—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member with helical teeth the inner and outer member having a different number of threads and one of the two being made of elastic materials, e.g. Moineau type
    • F04C2/1073—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member with helical teeth the inner and outer member having a different number of threads and one of the two being made of elastic materials, e.g. Moineau type where one member is stationary while the other member rotates and orbits
    • F04C2/1075—Construction of the stationary member
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2/00—Rotary-piston machines or pumps
    • F04C2/08—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
    • F04C2/10—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member
    • F04C2/107—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member with helical teeth
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C13/00—Adaptations of machines or pumps for special use, e.g. for extremely high pressures
    • F04C13/008—Pumps for submersible use, i.e. down-hole pumping
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2240/00—Components
    • F04C2240/10—Stators
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2240/00—Components
    • F04C2240/20—Rotors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2240/00—Components
    • F04C2240/80—Other components
    • F04C2240/802—Liners

Definitions

  • the present invention lies in the field of progressive cavity pumps used in installations for pumping hydrocarbons or gas in deep wells.
  • Progressive cavity pumps consist of a stator and a helical rotor inserted into the stator.
  • the stator generally consists of an armature tube made from a rigid material, typically metallic or composite.
  • the frame tube is generally cylindrical and has a constant thickness.
  • An elastomer liner is attached to the inside of this frame tube using a glue-type bonding system.
  • This sleeve has a helical longitudinal recess receiving the helical rotor.
  • the helical rotor has one less lobe than the stator so that at the interface between the rotor and the stator sealed cavities are created. The rotation of the rotor in the stator causes the displacement of these cavities and thus makes it possible to pump a fluid.
  • the separation is particularly present at the ends of the reinforcement tubes, at the point where the elastomer liner stops, allowing infiltration of the pumped fluid at the interface between the reinforcement tube and the liner.
  • Such a defect can lead to complete destruction of the pump stator and loss of function when the sleeve is completely or partially separated from the internal wall of the armature tube.
  • the object of the present invention is to provide a stator element having an elastomer liner having greater resistance to forces, and in particular capable of withstanding both orthoradial forces and axial forces.
  • the present invention relates to a stator element and a progressive cavity pump which can be used as a pump or as a drilling motor.
  • the progressive cavity pump 2 according to a first embodiment of the invention comprises a first 4, a second 6 and a third 8 stator elements, two tubular sections 10, 12, two tubular endpieces 14, 16 and a rotor 18 rotatably mounted in the stator elements, the tubular sections and the tubular ends.
  • Each tubular section 10, 12 is fitted between two stator elements 4, 6 and 6, 8 and makes it possible to fix the stator elements to each other and to center them with respect to each other.
  • the tubular ends 14, 16 are fitted to the free ends of the first 4 and the third 8 stator elements. They include a threaded portion 13 allowing the pump 2 to be attached to another pump or to a casing of a pumping installation.
  • the first 4, second 6 and third 8 stator elements are identical. They can be implemented according to a first embodiment illustrated in the figures 2 to 4 or according to a second embodiment illustrated in the figures 5 to 7 .
  • the first stator element 4 according to the first embodiment comprises an armature tube 20 extending along a longitudinal axis AA, and an elastomer liner 26 fixed in the armature tube.
  • the reinforcement tube 20 comprises a deformed central portion 21 and, at each of its ends, a cylindrical portion 23 with a circular base. It has an internal face 22 and an external face 24.
  • the elastomer sleeve 26 has an outer face 40 fixed to the inner face 22 of the frame tube, and an inner face 42 of helical shape having a pitch p1.
  • the central portion 21 of the reinforcement tube 20 has a substantially constant thickness e and is deformed so that it comprises a first relief 28 and a second relief 30.
  • the reliefs 28, 30 can be bumps or depressions . They are for example obtained by knurling the internal face 22 or the external face 24 of the central portion of the reinforcement tube.
  • the first 28 and the second 30 reliefs form, on the inner face of the central portion of the reinforcement tube, attachment elements for the elastomer liner 26. These attachment elements prevent the tearing of the latter.
  • the first relief 28 has the shape of a helical strip having a pitch to the right with respect to the longitudinal axis A-A of the frame tube.
  • the second relief 30 has the shape of a helical strip having a pitch to the left with respect to the longitudinal axis A-A of the frame tube. Due to this helical shape and the fact that the pitches of the helical bands are reversed, the first 28 and the second 30 reliefs prevent the tearing of the elastomer liner regardless of the direction of the forces applied to it.
  • the connection between the inner face 22 of the frame tube and the outer face 40 of the elastomer sleeve is more resistant to the axial and orthoradial forces generated during the rotation of the helical rotor 18.
  • the reliefs 28, 30 are formed by depressions of the outer face 24 of the frame tube. These depressions are referred to as helical grooves 34 below. These helical grooves 34 are in this example made by knurling the outer face 24 of the frame tube. These helical grooves 34 form helical indentations 36 on the inner face 22 of the frame tube.
  • first 28 and the second 30 reliefs are joined in several sections 32.
  • Intermediate zones 38 located between the first relief 28 and the second relief 30 have a concavity opposite to the concavity of the first 28 and second 30 reliefs.
  • the areas 38 form projections on the outer face 24 of the frame tube.
  • these intermediate zones 38 have the shape of a polygon of order 4.
  • the pitch p2 of the helicoid of the first relief 28 is identical to the pitch p1 of the helicoid of the inner face 42 of the elastomer liner.
  • the second and the third stator elements according to the first embodiment are identical to the first stator element and will not be described in detail.
  • the reliefs are constituted by projections which extend towards the outside of the anchoring tube and which form hollows on the side of the internal face of the reinforcement tube 20.
  • the pitch of the helicoid of the first relief 28 and the pitch of the helicoid of the second relief 30 is substantially equal to or greater than the length of the frame tube 20 so that the first relief 28 and the second relief 30 join in a single section 32.
  • the areas 38 positioned between the first band and the second band have the shape of a polygon of order 3.
  • the figures 5 to 7 represent stator elements according to a second embodiment of the invention.
  • the figure 5 represents a first 4 and a second 6 stator element partially assembled to the tubular section 10.
  • the first, second and third stator elements according to the second embodiment of the present invention are similar to the first, second and third stator elements according to the first embodiment except for the existence of two retaining rings 44 fixed in each stator element.
  • the parts of the stator elements according to the second embodiment identical to the parts of the stator elements according to the first embodiment include the same references and will not be described a second time.
  • the retaining rings 44 of the first 4 and of the second 6 stator elements are suitable for delaying the infiltration of the pumped fluid between the armature tube 20 and the elastomer liner 26. It retain the longitudinal ends of the elastomeric liner 26 against the inner face 22 of the frame tube.
  • the retaining rings 44 are secured in each cylindrical portion 23 of the frame tube 20 coaxially with the longitudinal axis A-A.
  • the elastomer liner 26 is shaped by injecting a raw elastomer mixture into the reinforcement tube 20 when the latter is provided with two retaining rings 44.
  • the retaining rings 44 have a U-shaped section capable of enclosing part of the longitudinal end of the elastomer liner 26.
  • the U-shaped radial section of the retaining rings comprises an external axial branch 46, a radial branch central 48 and an internal axial branch 50.
  • the external axial branch 46 is fixed on the internal face 22 of the cylindrical portion 23 of the frame tube.
  • the central radial branch 48 forms an axial stop for the tubular section 10 during the assembly of the first 4 and the second 6 stator elements.
  • An inner face 52 of the inner axial branch 50 comprises protuberances 54 in the shape of a sawtooth suitable for retaining the elastomer of the liner 26.
  • the retaining rings 44 form abutments preventing the axial displacement of the elastomer liner 26 and thus delay its tearing.
  • the tubular section 10 and the second stator element 6 are assembled and fixed together by applying a welding material at the level of the chamfers 56, the tubular section 10 in turn forms an abutment preventing the axial displacement of the retaining ring 44 of the first stator element and of the retaining ring 44 of the second stator element.
  • the third stator element 8 is fixed to the tubular end piece 16 by a weld 57.
  • the tubular end piece 16 has a threaded portion 13 and an opposite portion 58 fitted into the cylindrical portion 23 of the second stator element 6.
  • the retaining ring 44 bears against the tubular end piece 16.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Details And Applications Of Rotary Liquid Pumps (AREA)
  • Rotary Pumps (AREA)

Claims (10)

  1. Statorelement (4, 6, 8) einer Exzenterschneckenpumpe, wobei das Statorelement (4, 6, 8) aufweist:
    ∗ ein Armierungsrohr (20) mit einer Längsachse (A-A), einer Innenfläche (22) und einer Außenfläche (24), und
    ∗ eine Elastomer-Auskleidung (26), die an der Innenfläche des Armierungsrohrs befestigt ist,
    dadurch gekennzeichnet, dass mindestens ein Abschnitt (21) des Armierungsrohrs (20) eine im Wesentlichen konstante Dicke (e) aufweist, und dadurch, dass dieser Abschnitt (21) des Armierungsrohrs (20) derart verformt ist, dass er mindestens ein erstes Relief (28) und ein zweites Relief (30) aufweist, wobei das erste Relief (28) die Form eines helikalen Bands mit einem Rechtsgang bezüglich der Längsachse (A-A) des Armierungsrohrs hat, das zweite Relief (30) die Form eines helikalen Bands mit einem Linksgang bezüglich der Längsachse (A-A) des Armierungsrohrs hat, das erste Relief (28) und das zweite Relief (30) sich in mindestens einem Bereich (32) vereinigen.
  2. Statorelement (4, 6, 8) nach Anspruch 1, in welchem das erste Relief (28) und das zweite Relief (30) sich in mehreren Bereichen (32) vereinigen, und in welchem die zwischen dem ersten Relief (28) und dem zweiten Relief (30) angeordneten Zwischenzonen (38) eine Form eines Polygons mindestens der 3. Ordnung haben.
  3. Statorelement (4, 6, 8) nach einem der Ansprüche 1 und 2, in welchem das erste Relief (28) und das zweite Relief (30) Rillen (34) an der Außenfläche des Abschnitts (21) des Armierungsrohrs (20) bilden.
  4. Statorelement (4, 6, 8) nach einem der Ansprüche 1 bis 3, in welchem die Elastomer-Auskleidung (26) eine an der Innenfläche (22) des Armierungsrohrs (20) befestigte Außenfläche (40) und eine Innenfläche (42) in helikaler Form mit einer Ganghöhe (p1) aufweist, und in welchem die Ganghöhe (p2) des helikalen Bands des ersten Reliefs (28) identisch mit der Ganghöhe (p1) der helikalen Form der Innenfläche (42) der Elastomer-Auskleidung ist.
  5. Statorelement (4, 6, 8) nach einem der Ansprüche 1 bis 4, in welchem das Armierungsrohr (20) an jedem Ende einen zylindrischen Abschnitt (23) aufweist, und in welchem das Statorelement (4, 6, 8) mindestens einen axialen Haltering (44) aufweist, der an dem zylindrischen Abschnitt (23) des Statorelements (4, 6, 8) befestigt ist, wobei der Haltering (44) einen radialen Querschnitt einer allgemeinen U-Form hat, die geeignet ist, um einen Teil eines Längsendes der Elastomer-Auskleidung (26) zu umgeben.
  6. Statorelement (4, 6, 8) nach Anspruch 5, in welchem mindestens eine Innenfläche eines axialen Arms des Halterings (44) sägezahnförmige Vorsprünge (54) aufweist.
  7. Exzenterschneckenpumpe (2) aufweisend:
    - einen helikoidalen Rotor (18), der drehend in der Elastomer-Auskleidung (26) angeordnet ist,
    - mindestens ein erstes (4) und zweites (6) Statorelement nach einem der Ansprüche 5 bis 6,
    - ein rohrförmiges Stück (10), das auf der einen Seite in den zylindrischen Abschnitt (23) des ersten Statorelements (4) und auf der anderen Seite in den zylindrischen Abschnitt (23) des zweiten Statorelements (6) eingesetzt ist, wobei das rohrförmige Stück (10) auf der einen Seite gegen den Haltering (44) des ersten Statorelements (4) und auf der anderen Seite gegen den Haltering (44) des zweiten Statorelements (6) anliegt, wobei das rohrförmige Stück (10) einen Anschlag bildet, der geeignet ist, um die axiale Verschiebung der Halteringe (44) zu verhindern.
  8. Exzenterschneckenpumpe (2) nach Anspruch 7, die ferner ein rohrförmiges Endstück (14, 16) mit einem Gewindeabschnitt (13) und einem Gegenabschnitt (58), der in einen anderen zylindrischen Abschnitt (23) des zweiten Statorelements (6) eingesetzt ist, aufweist, wobei das rohrförmige Endstück (14, 16) einen Anschlag bildet, der die axiale Verschiebung des Halterings (44) verhindert.
  9. Exzenterschneckenpumpe (2) nach einem der Ansprüche 7 und 8, in welcher der zylindrische Abschnitt (23) des ersten Statorelements (4), der zylindrische Abschnitt (23) des zweiten Statorelements (6) und das rohrförmige Stück (10) mittels Schweißen befestigt sind.
  10. Exzenterschneckenpumpe (2) nach einem der Ansprüche 8 und 9, in welcher der zylindrische Abschnitt (23) des zweiten Statorelements (8) und das rohrförmige Endstück (16) mittels Schweißen (57) befestigt sind.
EP19730401.7A 2018-05-23 2019-05-16 Statorelement einer exzenterschneckenpumpe und exzenterschneckenpumpe Active EP3797223B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1854309A FR3081519B1 (fr) 2018-05-23 2018-05-23 Element de stator d'une pompe a cavites progressives et pompe a cavites progressives
PCT/FR2019/051113 WO2019224457A1 (fr) 2018-05-23 2019-05-16 Elément de stator d'une pompe à cavités progressives et pompe à cavités progressives

Publications (2)

Publication Number Publication Date
EP3797223A1 EP3797223A1 (de) 2021-03-31
EP3797223B1 true EP3797223B1 (de) 2022-07-20

Family

ID=63557574

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19730401.7A Active EP3797223B1 (de) 2018-05-23 2019-05-16 Statorelement einer exzenterschneckenpumpe und exzenterschneckenpumpe

Country Status (5)

Country Link
US (1) US11326594B2 (de)
EP (1) EP3797223B1 (de)
CA (1) CA3100403A1 (de)
FR (1) FR3081519B1 (de)
WO (1) WO2019224457A1 (de)

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3514238A (en) * 1968-09-16 1970-05-26 Black & Decker Mfg Co Cylinder for fluid pump motor and the like and method of making
DE3438379A1 (de) * 1984-10-19 1986-04-24 Kunststofftechnik Rodenberg GmbH & Co KG, 3054 Rodenberg Stator fuer exzenterschneckenpumpen
GB2244517B (en) * 1990-05-31 1994-05-04 Mono Pumps Ltd Helical gear pump and stator
DE19804258A1 (de) * 1998-02-04 1999-08-12 Artemis Kautschuk Kunststoff Exzenterschneckenpumpe
DE10245497C5 (de) * 2002-09-27 2009-02-19 Wilhelm Kächele GmbH Elastomertechnik Exzenterschneckenpumpe mit vergrößertem Temperaturbereich
DE10338632B4 (de) * 2003-08-22 2005-11-03 Wilhelm Kächele GmbH Exzenterschneckenpumpe mit erosionsfestem Rotor
DE102004038477B3 (de) * 2004-08-07 2005-10-06 Netzsch-Mohnopumpen Gmbh Exzenterschneckenpumpe
RU2402693C1 (ru) * 2009-03-10 2010-10-27 Открытое акционерное общество "Павловский машзавод" Одновинтовая гидравлическая машина
US8523545B2 (en) * 2009-12-21 2013-09-03 Baker Hughes Incorporated Stator to housing lock in a progressing cavity pump
DE102012112044B4 (de) * 2012-05-04 2015-10-08 Netzsch Pumpen & Systeme Gmbh Selbstfixierendes Statorgehäuse

Also Published As

Publication number Publication date
EP3797223A1 (de) 2021-03-31
US11326594B2 (en) 2022-05-10
FR3081519B1 (fr) 2020-05-29
CA3100403A1 (fr) 2019-11-28
WO2019224457A1 (fr) 2019-11-28
US20210190068A1 (en) 2021-06-24
FR3081519A1 (fr) 2019-11-29

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