EP1404973B2 - Procede de fabrication de stator de pompe moineau et stator ainsi obtenu - Google Patents

Procede de fabrication de stator de pompe moineau et stator ainsi obtenu Download PDF

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Publication number
EP1404973B2
EP1404973B2 EP02787097A EP02787097A EP1404973B2 EP 1404973 B2 EP1404973 B2 EP 1404973B2 EP 02787097 A EP02787097 A EP 02787097A EP 02787097 A EP02787097 A EP 02787097A EP 1404973 B2 EP1404973 B2 EP 1404973B2
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EP
European Patent Office
Prior art keywords
stator
stator cavity
cavity
forming
tubular
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP02787097A
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German (de)
English (en)
French (fr)
Other versions
EP1404973B1 (fr
EP1404973A1 (fr
Inventor
Lionel Lemay
Jean-Pierre Chopard
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
Original Assignee
PCM
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Publication date
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Publication of EP1404973A1 publication Critical patent/EP1404973A1/fr
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Publication of EP1404973B1 publication Critical patent/EP1404973B1/fr
Publication of EP1404973B2 publication Critical patent/EP1404973B2/fr
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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
    • F04C2230/00—Manufacture
    • F04C2230/20—Manufacture essentially without removing material
    • F04C2230/27—Manufacture essentially without removing material by hydroforming
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49229—Prime mover or fluid pump making
    • Y10T29/49236—Fluid pump or compressor making

Definitions

  • the present invention is in the field of gear pumps of the Moineau pump type, also called progressive cavity pumps, and more particularly relates to improvements in the manufacture and structure of the stators of such pumps, these stators comprising a stator cavity. of helicoidal shape and general axial extent within an elongated body.
  • the stator is usually made of molded elastomer enclosed in a rigid casing.
  • Such an arrangement is satisfactory in many applications for which the temperature of the product to be moved remains below 140 ° C, maximum acceptable temperature without damage by the elastomer, and for which also the product to be moved is chemically compatible with the elastomer.
  • metal stator cavities can overcome the aforementioned drawbacks in various fields of industry, provided however that the cost of such metal cavity stators is not prohibitive.
  • a structure and a method of manufacturing a Moineau pump stator in which the stator cavity is constituted by a tubular element which may be metallic.
  • this known stator is of composite type: the metal tubular element defining the stator cavity is secured to an outer casing via an elastic material (such as an elastomer) filling the gap annular between the tubular metal element and the housing; in addition, the tubular element is dimensioned so that, under the action of the elastic filling material, it applies and / or maintains a stress on the rotor of the pump.
  • an elastic material such as an elastomer
  • a stator thus arranged restricts the range of use of the pump, on the one hand, because of the rotor clamping by the stator (which excludes pumps for abrasive or highly viscous products - such as heavy oils -) and, on the other hand, because of the presence of the filler material such as an elastomer (which excludes pumps intended to operate in high temperature environments - such as deep well oil extraction pumps -).
  • tubular element forming a stator cavity, housing, filling material
  • this known stator consists in arranging a metal tubular section, with a core inserted inside the latter, in a housing; then to apply a pressure on the outside of the tubular metal section so as to deform to make it fit the shape of the core, said pressure may come from a pressurized fluid introduced into the annular space between the tubular section and the casing ; and finally removing the mandrel and filling the annular space between the tubular element forming a stator cavity and the housing with an elastic material adapted for said tubular member to apply and / or maintain a stress on the rotor.
  • a first drawback lies in the fact that the process of deformation, in particular by hydraulic flight, of the initial tubular section is conducted inside the stator housing which thus serves as a pressure chamber. It is then necessary to oversize the housing so that it can mechanically withstand the forming pressures, then after this oversizing becomes useless during operation of the pump.
  • the purpose of the invention is therefore to simultaneously remedy the various drawbacks mentioned above and to propose improvements in the manufacture and structure of Moineau pump stators which are of a nature to satisfy the various requirements of the practice, in particular with regard to relates to the stiffness of the stator cavity, the structural simplicity of the stator and the conduct of the manufacturing process.
  • the preliminary mechanical forming makes it possible to cause significant local radial deformations despite the substantial thickness of the wall to be deformed, but without it being possible to achieve a high precision of shape; on the contrary, the process of hydroforming under very high pressure (for example of the order of 4000 x 10 5 Pa) makes it possible to achieve a precise forming on a core, but provided that the amplitude of the localized radial deformation is relatively small.
  • the preforming step leading to the roughing is carried out, in successive passes, by successive external crushing of the metal tube between jaws facing each other, the metal tube and the jaws being relatively displaced in successive steps, axially and in rotation.
  • the preforming step leading to the roughing is carried out by relatively moving the metal tube and at least two pressure rollers, said metal tube in particular being able to rotate about its axis while the two rollers, supported on the tube diametrically opposed, are moved parallel to the axis of said tube.
  • the basic terminal step implementing a hydroforming process can be performed by compressing the blank on a core disposed inside thereof, which leads to transfer, by direct contact with the outer surface of the core and the inner surface of the blank, the exact shape and the precise dimensions of the core to the stator cavity; or it can be carried out by dilating the blank inside a mold, which implies a good control of the deformation of the metal and a good control of its thickness so that the conformation of the outer face of the mold tubular element in contact with the mold is reflected on its inner face by an exact conformation and a precise dimensioning of the stator cavity.
  • the metal tubular element forming a stator cavity is introduced inside a cylindrical tubular envelope, and the ends of the tubular stator cavity are secured to said envelope; then optionally filling the annular space between the stator cavity and the envelope with a rigid filler material to relieve the fasteners in the presence of vibration.
  • stator sections are individually manufactured as described above and are secured end to end, in particular by screwing or welding.
  • the invention proposes a pump pump stator of the Moineau pump type, comprising a stator cavity of axial general extent inside an elongate body, characterized in that the stator cavity is defined. by a rigid walled metal tubular element internally having the shape and the dimensions of the stator cavity such that, after assembly of the stator with a rotor, a positive clearance with the rotor and obtained by implementing the method and this tubular element is defined is secured to an outer casing by means of rigid rings forming wedging spacers which are interposed between the ends of said metal tubular element forming a stator cavity and the outer casing.
  • These rings form flanges for fixing the stator to the adjacent elements upstream and downstream; moreover, in the case of the presence of an outer casing, these rigid rings form wedge spacers interposed between the ends of said metal tubular element forming the stator cavity and the outer casing.
  • the assembly of the rings with the metal tubular element forming a stator cavity and, when this is the case, with the outer casing can be carried out in any appropriate manner, in particular by welding and / or screwing.
  • the annular gap defined between the metal tubular element forming the stator cavity and the casing can be filled with a rigid filling material, for example a thermosetting resin or a cement, capable of reinforcing the vibration resistance of the securing means between the tubular element and the housing.
  • a rigid filling material for example a thermosetting resin or a cement
  • the stator is formed with a stator cavity with a rigid metal wall which is therefore able to meet the specific requirements of various users while the stator cavity is no longer hollowed out in a solid metal body, It is no longer necessary to use, for its manufacture, expensive means and much simpler and less expensive technological solutions can be implemented for this purpose, a particularly effective example will be indicated later.
  • stator of great length high-pressure pump
  • stators of Moineau pumps with a metal stator cavity (for example bronze type UE9 or the like or stainless steel type 316L or the like) that meet the aspirations at least some users, such stators can be manufactured in large series under attractive economic conditions.
  • a metal stator cavity for example bronze type UE9 or the like or stainless steel type 316L or the like
  • stator for Sparrow pump generally designated by the reference 1
  • a possible embodiment of stator for Sparrow pump comprises a casing or external rigid casing 2, of elongated shape and generally tubular conformation, inside which is fixed a metallic tubular element 3 with a rigid wall which internally has the shape and dimensions of the desired stator cavity.
  • FIG. 6 An enlarged perspective view of element 3 is given to the figure 6 , which gives a more accurate representation of the Moineau profile, namely a helical gear with an almost elliptical cross section.
  • the element 3 is illustrated on a length limited to a pitch P of helical winding; D denotes the nominal diameter of the tubular element 3, and E denotes the eccentricity.
  • the tubular element 3 forming a stator cavity is made of any suitable metal for its mechanical constitution and for the application for which the pump is intended; the choice of material must be such that the metal stator cavity and the metal rotor enclosed therein are made of respective metallic materials which have compatible thermal expansion coefficients so that any dimensional variation of one is accompanied by a substantially identical dimensional variation, in amplitude and direction, of the other in order to maintain an approximately constant positive clearance over a wide temperature range of up to 300 ° C for deep well oil extraction pumps (see below) point the document FR-A-2,756,018 ); likewise, for food applications, the metal material of the stator cavity must be inert with respect to the product; It is the same for example for the pumping of acidic or basic products.
  • tubular element 3 forming a bronze stator cavity of the UE9 type or equivalent; or stainless steel type 316L or equivalent.
  • the tubular element 3 is relatively thick walled, that is to say that the thickness of its wall is a few percent (for example 6%) of its nominal diameter: the essential is that the thickness of this wall must be sufficient to impart excellent rigidity to the tubular element 3.
  • the tubular element 3 is secured to the outer casing in any appropriate manner suitable for obtaining a rigid assembly and indeformable axis.
  • wedging rings 4 are interposed between the respective ends of the tubular element 3 and the housing and mechanically fixed thereto, in particular by screwing or preferably by welding.
  • Such a welded joint is shown on the enlarged partial view of the figure 4 , on which is schematized in 5 the weld bead of the ring 4 on the front end of the tubular element 3 and 6 the weld bead of the ring 4 with the end of the housing 2 in which it is partially engaged.
  • tubular element 3 thus arranged does not have sufficient longitudinal rigidity, it is necessary to provide one or more intermediate support by setting intermediate ring (s) lntermediaire (s).
  • FIG. figure 2 which consists in filling the annular gap 7 between the tubular element 3 and the casing 2 with a rigid filling material 8 (for example a thermosetting resin, a cement, a cement ceramic, etc.): this results elimination, or at least attenuation, of the vibrations of this element 3.
  • a rigid filling material 8 for example a thermosetting resin, a cement, a cement ceramic, etc.
  • stator sections individually constituted as indicated above.
  • a long stator formed by the end-to-end joining of two stators 1 such as the one of FIG. figure 1 .
  • the mechanical assembly of the two stators 1 can be carried out in any appropriate way, in particular by screwing or preferably by welding.
  • the weld bead of the two end-to-end stators has been designated by 9: for this purpose, the end faces of the abutting rings 4 are chamfered and the weld bead 9 is deposited in the annular groove. thus constituted.
  • the tubular metal element 3 forming the stator cavity may, on its own, have sufficient rigidity and the presence of a housing 2 becomes superfluous. As illustrated in figure 5 , the stator 1 then consists only of the tubular element 3.
  • the metallic tubular element 3 can be manufactured by any appropriate means. However, its complex general shape as well as the dimensional accuracy and the quality of the surface state required for its internal face which is, strictly speaking, the stator surface make the usual means too expensive and / or difficult to implement. too long to allow industrial mass production.
  • a preliminary preforming step is first carried out during which the initial metal tube is mechanically deformed so as to preform a tubular blank having, internally, approximately the shape and dimensions of the desired stator cavity.
  • the formal and dimensional approximation may, for example, be of the order of 5%.
  • One solution for implementing this preforming step consists in hammering the initial tube, as illustrated in FIG. Figure 7A by exerting a diametrical pressure (arrows 11) on the tube 12 taken between two jaws 10 integral with a press.
  • the jaws 10 are shaped and mutually arranged (for example offset angularly relative to one another) so as to indent the tube to form the valleys or "valleys" of the helical windings.
  • the jaws 10 providing localized deformations, It is necessary to proceed in successive passes along the tube which is moved, not by step, simultaneously axially (arrow 13) and in rotation (arrow 14) to follow the profile of the Moineau propeller .
  • FIG. Figure 7B Another solution, currently preferred, is to deform the tube between at least two rotary rollers, as shown in FIG. Figure 7B .
  • the tube 12 is rotated about its axis (arrow 14).
  • several rollers 21 in practice two rollers 21 diametrically opposed are pressed towards each other so as to locally crush the tube between them: at the same time as the tube turns on itself, the two rollers 21 turn around their respective axes 22 (arrows 23) and a relative axial displacement is generated between the tube 12 and the set of rollers 21.
  • the rotating tube is not moved axially, while it is the set of rotating rollers 21 which is moved (arrows 24) parallel to the axis of the tube.
  • the final step of final shaping of the blank 12 is carried out in order to obtain the tubular element 3 forming a stator cavity.
  • this final shaping is carried out by a hydroforming process, that is to say that one of the faces (inner or outer) of the blank 12 is subjected to a hydraulic pressure, which, considering the rigidity of the metal wall, must be high and which is exerted uniformly at each point of the surface, so that the wall of the blank, in spite of its rigidity, is pressed on a reference footprint that she marries closely and of which she keeps the exact shape and dimensions.
  • the blank 12 is threaded onto a core 15 having, externally, the exact desired conformation for the stator cavity.
  • the blank / core assembly is placed in a closed chamber 16 (hydroforming chamber) which is filled with a liquid 17.
  • a liquid 17 By putting this liquid under pressure, the blank 12 (arrows 18) is crushed on the core 15
  • the metallic tubular element 3 is thus formed, the inner face of which is exactly shaped according to the external shape of the core 15 (hydroforming by compression on an inner core).
  • the blank 12 is introduced into a mold 19 having a cavity 20 shaped to the exact shape to be given to the tubular element 3 to form a stator cavity.
  • the ends of the blank 12 are sealed and the internal volume of the blank is filled with liquid 17.
  • the blank 12 is crushed (arrows 18) the blank 12 against the wall of the mold cavity 20
  • the tubular element 3 is thus formed (hydroforming by expansion against an external mold).
  • the hydroforming process is carried out using, as a liquid medium, water brought to a pressure of the order of 4 ⁇ 10 8 Pa for a duration of about 10 minutes.
  • the assembly of the stator is completed by joining this element 3 to the casing 2, for example by means of rings 4, in particular welded, and optionally with filling of the gap 7 between the element 3 and the casing 2, according to the indications given above in relation to the Figures 1 to 4 .
  • the manufacturing method of the element 3 according to the invention is capable of being used industrially and allows industrial mass production of the metal tubular element 3 forming a stator cavity.
  • the provisions of the invention therefore make it possible to envisage serial production and acceptable costs of Moineau pumps equipped with metal cavity stator adapted to meet the needs in at least some areas of the industry, and in particular the pumps in which positive play must be maintained between stator and rotor.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Rotary Pumps (AREA)
  • Details And Applications Of Rotary Liquid Pumps (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
EP02787097A 2001-06-21 2002-06-14 Procede de fabrication de stator de pompe moineau et stator ainsi obtenu Expired - Lifetime EP1404973B2 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR0108189A FR2826407B1 (fr) 2001-06-21 2001-06-21 Stator de pompe moineau et procede pour sa fabrication
FR0108189 2001-06-21
PCT/FR2002/002052 WO2003008807A1 (fr) 2001-06-21 2002-06-14 Procede de fabrication de stator de pompe moineau et stator ainsi obtenu

Publications (3)

Publication Number Publication Date
EP1404973A1 EP1404973A1 (fr) 2004-04-07
EP1404973B1 EP1404973B1 (fr) 2005-02-02
EP1404973B2 true EP1404973B2 (fr) 2008-05-07

Family

ID=8864605

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02787097A Expired - Lifetime EP1404973B2 (fr) 2001-06-21 2002-06-14 Procede de fabrication de stator de pompe moineau et stator ainsi obtenu

Country Status (8)

Country Link
US (1) US6872061B2 (zh)
EP (1) EP1404973B2 (zh)
CN (1) CN100535443C (zh)
CA (1) CA2451462C (zh)
DE (1) DE60202873T3 (zh)
EA (1) EA005327B1 (zh)
FR (1) FR2826407B1 (zh)
WO (1) WO2003008807A1 (zh)

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FR2794498B1 (fr) * 1999-06-07 2001-06-29 Inst Francais Du Petrole Pompe a cavites progressantes a stator composite et son procede de fabrication
US7442019B2 (en) 2002-10-21 2008-10-28 Noetic Engineering Inc. Stator of a moineau-pump
DE20302615U1 (de) * 2003-02-17 2004-07-15 Tower Automotive Gmbh & Co. Kg Hohlformteil mit geschlossenem Querschnitt und einer Verstärkung
US20050109502A1 (en) * 2003-11-20 2005-05-26 Jeremy Buc Slay Downhole seal element formed from a nanocomposite material
US7214042B2 (en) * 2004-09-23 2007-05-08 Moyno, Inc. Progressing cavity pump with dual material stator
DE102005028818B3 (de) * 2005-06-22 2006-08-24 Artemis Kautschuk- Und Kunststoff-Technik Gmbh Stator für eine Exzenterschneckenpumpe und Verfahren zu seiner Herstellung
CA2673720C (en) 2007-01-24 2013-04-16 Halliburton Energy Services, Inc. Electroformed stator tube for a progressing cavity apparatus
US8257633B2 (en) * 2007-04-27 2012-09-04 Schlumberger Technology Corporation Rotor of progressive cavity apparatus and method of forming
US8182252B2 (en) * 2007-10-30 2012-05-22 Moyno, Inc. Progressing cavity pump with split stator
US8215014B2 (en) 2007-10-31 2012-07-10 Moyno, Inc. Method for making a stator
US20090152009A1 (en) * 2007-12-18 2009-06-18 Halliburton Energy Services, Inc., A Delaware Corporation Nano particle reinforced polymer element for stator and rotor assembly
US8523545B2 (en) 2009-12-21 2013-09-03 Baker Hughes Incorporated Stator to housing lock in a progressing cavity pump
CN101892982B (zh) * 2010-06-28 2012-06-20 中国石油大学(北京) 单螺杆金属螺杆泵定子及其内螺旋面加工方法
GB2497225B (en) 2010-08-16 2017-10-11 Nat Oilwell Varco Lp Reinforced stators and fabrication methods
US8944789B2 (en) 2010-12-10 2015-02-03 National Oilwell Varco, L.P. Enhanced elastomeric stator insert via reinforcing agent distribution and orientation
CN102062089A (zh) * 2010-12-24 2011-05-18 新疆华易石油工程技术有限公司 一种全金属螺杆泵定子的加工方法
AU2014300772B2 (en) * 2013-06-28 2018-07-26 Colormatrix Holdings, Inc. Pump system for polymeric materials
DE102013107884A1 (de) 2013-07-23 2015-01-29 Ralf Daunheimer Vorrichtung zur materialabtragenden Bearbeitung der Innenwandung eines rohrförmig ausgebildeten Hohlkörpers
CA2938763C (en) 2014-02-18 2020-12-15 Reme Technologies, Llc Graphene enhanced elastomeric stator
FR3020097B1 (fr) 2014-04-22 2019-07-19 Pcm Technologies Pompe a cavites progressantes
DE102014116327A1 (de) * 2014-11-10 2016-05-12 Netzsch Pumpen & Systeme Gmbh Verfahren zur Herstellung eines gewendelten Stators und Vorrichtung zur Herstellung eines gewendelten Stators
CN104707907B (zh) * 2015-02-09 2017-04-12 中国石油天然气股份有限公司 将中空管加工成螺杆泵定子的模具及其成型方法
CN104907383A (zh) * 2015-06-25 2015-09-16 王海燕 一种等壁厚螺杆泵定子管制造方法
CN105574274B (zh) * 2015-12-18 2018-08-03 武昌船舶重工集团有限公司 一种大中型卧式离心铸型金属筒套截面中拉应力计算方法
US10920493B2 (en) * 2017-02-21 2021-02-16 Baker Hughes, A Ge Company, Llc Method of forming stators for downhole motors
DE102019126675A1 (de) * 2019-10-02 2021-04-08 Netzsch Pumpen & Systeme Gmbh Exzenterschneckenpumpe in modularer bauweise
GB2606231B (en) * 2021-04-30 2023-09-27 Edwards Ltd Holweck drag pump and method of manufacture
CN113399484B (zh) * 2021-05-11 2023-03-28 广东斯坦德流体系统有限公司 一种螺杆泵衬套成型机
FR3136019B1 (fr) 2022-05-25 2024-05-10 Pcm Tech Pompe à cavités progressives et dispositif de pompage

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US3457762A (en) * 1967-04-28 1969-07-29 Arma Corp Compression method for making a tubular product
AU491586B2 (en) * 1975-01-28 1976-07-29 Sigma Lutin Improvements relating to stators for single-spindle pumps
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DE19804259A1 (de) * 1998-02-04 1999-08-12 Artemis Kautschuk Kunststoff Elastomerstator für Exzenterschneckenpumpen
DE19804260C2 (de) * 1998-02-04 2003-04-10 Artemis Kautschuk Kunststoff Elastomerstator für eine Exzenterschneckenpumpe
US6309195B1 (en) * 1998-06-05 2001-10-30 Halliburton Energy Services, Inc. Internally profiled stator tube
DE19827101A1 (de) * 1998-06-18 1999-12-23 Artemis Kautschuk Kunststoff Nach dem Moineau-Prinzip arbeitende Maschine für den Einsatz in Tiefbohrungen
US6241494B1 (en) * 1998-09-18 2001-06-05 Schlumberger Technology Company Non-elastomeric stator and downhole drilling motors incorporating same
FR2794498B1 (fr) * 1999-06-07 2001-06-29 Inst Francais Du Petrole Pompe a cavites progressantes a stator composite et son procede de fabrication
US6497030B1 (en) * 1999-08-31 2002-12-24 Dana Corporation Method of manufacturing a lead screw and sleeve mechanism using a hydroforming process

Also Published As

Publication number Publication date
US6872061B2 (en) 2005-03-29
FR2826407B1 (fr) 2004-04-16
CA2451462A1 (fr) 2003-01-30
DE60202873T2 (de) 2006-04-13
EP1404973B1 (fr) 2005-02-02
EA005327B1 (ru) 2005-02-24
EP1404973A1 (fr) 2004-04-07
FR2826407A1 (fr) 2002-12-27
US20040126257A1 (en) 2004-07-01
CN1518639A (zh) 2004-08-04
DE60202873T3 (de) 2009-07-09
WO2003008807A1 (fr) 2003-01-30
CA2451462C (fr) 2008-05-27
CN100535443C (zh) 2009-09-02
EA200301294A1 (ru) 2004-06-24
DE60202873D1 (de) 2005-03-10

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