EP0457925A1 - Betriebsorgan eines schraubenförmigen antriebes im bohrloch - Google Patents

Betriebsorgan eines schraubenförmigen antriebes im bohrloch Download PDF

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Publication number
EP0457925A1
EP0457925A1 EP91910653A EP91910653A EP0457925A1 EP 0457925 A1 EP0457925 A1 EP 0457925A1 EP 91910653 A EP91910653 A EP 91910653A EP 91910653 A EP91910653 A EP 91910653A EP 0457925 A1 EP0457925 A1 EP 0457925A1
Authority
EP
European Patent Office
Prior art keywords
sections
working
screw
teeth
rotor
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP91910653A
Other languages
German (de)
English (en)
French (fr)
Inventor
Anatoly Mikhailovich Kochnev
Andrei Nikolaevich Vshivkov
Vladimir Borisovich Goldobin
Jury Arsenievich Korotaev
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.)
PERMSKY FILIAL VSESOJUZNOGO NAUCHNO-ISSLEDOVATELSKOGO INSTITUTA BUROVOI TEKHNIKI
Original Assignee
PERMSKY FILIAL VSESOJUZNOGO NAUCHNO-ISSLEDOVATELSKOGO INSTITUTA BUROVOI TEKHNIKI
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 PERMSKY FILIAL VSESOJUZNOGO NAUCHNO-ISSLEDOVATELSKOGO INSTITUTA BUROVOI TEKHNIKI filed Critical PERMSKY FILIAL VSESOJUZNOGO NAUCHNO-ISSLEDOVATELSKOGO INSTITUTA BUROVOI TEKHNIKI
Publication of EP0457925A1 publication Critical patent/EP0457925A1/de
Withdrawn legal-status Critical Current

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Classifications

    • 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
    • E21B4/00—Drives for drilling, used in the borehole
    • E21B4/02—Fluid rotary type drives
    • 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
    • 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
    • F04C2230/60—Assembly methods
    • 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

Definitions

  • the invention relates to drilling technology and relates in particular to a working member of screw-type bottom-hole motors for producing oil and gas holes.
  • Both the rotor and the stator, which have screw teeth, are normally operated together in the motor, and can generally be called the working pair of the motor, as the working organ of a downhole screw motor.
  • the rotors are generally made entirely of metal, consist of a rolling stock with a full cross section, or are tubular.
  • the stators are made of rubber and metal and have screw teeth on the inside on an elastomer coating, which is connected to a cylindrical recess of the metallic stator frame by vulcanization.
  • the number of screw tooth divisions of the working pair is a little more than two in the known motors.
  • the production of a large number of screw tooth divisions of the working couple encounters procedural problems, nevertheless it is necessary to increase their number due to the increase in the force moment on the output shaft, which influences the technical-economic indicators of the drilling work. In recent times there has been a trend towards increasing the division number of the working couple signed the production of the work organ from interconnected individual sections.
  • a work organ with several divisions for a bottom-hole screw motor in the form of a rotor or stator is known (US, A, 39I2426).
  • the rotor contains individual sections with outer screw teeth that are continuously arranged one behind the other and are rigidly connected to one another by welding.
  • the stator also has individual sections with internal screw teeth and a device for connecting the sections to one another. The latter is designed as openings on one of the end faces of the adjacent sections and as pins on the other end face. At their ends, the end sections of the stator are clamped in the housing by means of screws.
  • a working element for a downhole sole screw motor for producing bores for example for a rotor, which consists of individual sections with external screw teeth, which are arranged continuously one behind the other and connected to one another by means of a device for connection.
  • the device for connecting the sections to one another has a rod on which individual rotor sections are continuously placed. Openings for receiving bolts are provided on the end faces of the rotor sections, by means of which the sections are connected to one another. Some of the rotor sections on the rod are attached to their end faces by means of screws. Thanks to this structural design of the rotor, rotor sections of different lengths can be arranged on the rod, the production of which is not technologically difficult. The length of each section varies between I5 and 30 cm.
  • the working element of the downhole screw motor as a stator just like the rotor, contains individual sections which are continuously arranged one behind the other. Openings for receiving bolts are provided on the end faces of the stator sections, through which the sections are connected to one another, and the stator sections are fastened in the housing by means of screwing on the end faces.
  • the sections are not connected to one another reliably enough because the moment of force between the sections of the working organ (the rotor or stator) is transmitted via the bolts, the number of which does not exceed that of the working organ teeth and the bolt diameters by Sizes of the rotor or stator cross-section and are limited by the tooth height.
  • the orientation of the screw surfaces of the sections to be connected requires such additional work to be carried out in order to ensure a very precise mutual arrangement of the openings for receiving the bolts and their arrangement relative to the seating surfaces of the sections provided on the rod of the rotor or the stator housing and their arrangement relative to the screw teeth of the rotor or stator in the plane of the end faces of the sections of each working element. Any deviations in the mutual arrangement of the elements mentioned result in poorer orientation accuracy or make the assembly of the rotor or stator impossible.
  • the invention has for its object to provide a working organ for a downhole screw motor for producing boreholes, the connecting elements for the connection of the sections of this working member are designed so that the sections are reliably connected to each other, higher moments of force are transmitted and the processes both in the manufacture of these sections, as well as in their connection to the work organ do not become more complicated.
  • each connecting element is designed as a mount which is rigid on the sections to be connected is attached and has screw teeth, the pitch and direction of which are equal to the pitch and direction of the screw teeth of the sections to be connected, and the screw tooth profile of the socket is equidistant from the screw tooth profile of the sections to be connected.
  • each socket prefferably has a constant or variable wall thickness.
  • the sections of the work organ connecting sockets are provided with the screw teeth, the pitch and direction of which are the same as the screw teeth of the sections, and that the screw tooth profile of the sockets is equidistant from the tooth profile of the sections, the force moment developing is transmitted via the interacting tooth screw surfaces, which are along the outline whose cross and axial section are applied.
  • a large area of contact of the cooperating screw surfaces of sections of the working member and the frames connecting them results in low specific loads at the connection points and consequently a high reliability of the connection is ensured.
  • the connecting element in the form of a socket with the same wall thickness, the weight of the working element can be reduced and the work step for its manufacture can be facilitated.
  • connection element for connecting the rotor to a cardan shaft or a flexible shaft can be provided on the mount, with the aid of which the moment of force is transmitted from the rotor to the output shaft of the support element of the screw motor.
  • the sockets with a variable wall thickness which are arranged for the connection of the sections along the length of a rotor serving as a working element, reliably ensure the transmission of the torque with a reduced wall thickness of this working element.
  • the working organ of a downhole screw motor with external screw teeth such as e.g. a rotor, is composed of tubular individual sections I (FIG. I), which are arranged consecutively one behind the other and are connected to one another by means of connecting elements in the form of sockets 2.
  • the sections I of the working organ have the shape of a tubular profile envelope with a constant wall thickness, the outer surfaces being the active surfaces Serve screw teeth 3.
  • Each socket 2 is accommodated in the interior of the sections to be connected by carding over the joints of these sections, and has outer screw teeth 4 which, according to the division t and the direction with the division t I and the direction of the teeth 3 of the sections I of the working organ to match.
  • the profile of the teeth 4 of the sockets 2 is equidistant from the profile of the teeth 3 of the sections I to be connected.
  • the teeth 4 of the sockets 2 lie close to the inner screw surfaces 5 (FIGS. 2, 3) of the teeth 3 of both adjacent sections I.
  • the sockets 2 are rigidly attached to the sections I to be connected by methods known per se, such as soldering, gluing, welding or the like.
  • the socket 2 is a hollow part with outer teeth 4 and - as shown in FIG. 2 - has a constant wall thickness a or a variable wall thickness b, b I - as shown in FIG. 3 - the length of the socket 2 being is 8 to 20 times shorter than the length of the sections I to be joined.
  • the version 2 has a variable wall thickness, it can be used not only for the connection of the sections to each other, but also for the connection of the working element (a rotor) with a cardan shaft or a flexible shaft, which is used for the transmission of the moment of force and the axial load from Rotor on the shaft of the support element of the downhole screw motor (the propshaft and the support element are not shown in figures) are used.
  • the working element a rotor
  • a cardan shaft or a flexible shaft which is used for the transmission of the moment of force and the axial load from Rotor on the shaft of the support element of the downhole screw motor (the propshaft and the support element are not shown in figures) are used.
  • the connecting elements according to the invention can be used for connecting the sections of the working element of the downhole screw motor for which a stator is used, as can be seen in FIGS. 4, 5.
  • the sections 7 of the work organ which are arranged continuously one behind the other and are designed as a tubular profile sleeve with a constant wall thickness, connected to one another by means of sockets 8, which are arranged from the outside on the sections 7 to be connected at their abutment and have a constant thickness.
  • Each socket 8 has inner screw teeth 9 which, according to the division t2 and direction with the division t3 and direction of the inner teeth I0 of the sections 7 of the working organ.
  • the profile of the inner screw teeth 9 of the sockets 8 is equidistant from the profile of the inner teeth 10 of the sections 7 of the working organ to be connected.
  • the teeth 9 of the sockets 8 lie tightly against the outer screw surfaces II of the two adjacent sections 7 and are firmly attached to them in a manner known per se, as stated above.
  • the end sections of the end sections 7 of the stator serving as the working member are connected to a drill string and a support element (not shown in FIG. 4).
  • borehole bottom screw motors are operated under abrasive conditions of the drilling fluid, it makes sense to coat one of the elements of the working pair with an elastomer, a nitryl rubber or another known suitable material to improve the wear resistance.
  • FIG. 6 show an embodiment of a rotor serving as a work organ, the outer screw teeth I2 of which are provided with a coating I3 which is applied by methods known in the art.
  • This rotor can be used in combination with the stator shown in FIG. 4. It is obvious here that the coating can be applied to the inner surface of the screw teeth of the stator, which in the present case together with the I rotor can be used.
  • the working organ of a downhole screw motor which is composed of several tubular sections which are connected to one another by means of sockets, can be of any length.
  • the tubular sections I are united with the socket 2 on the screw tooth surfaces and rigidly attached to the socket 2 in a manner known per se in the art (for example by soldering, gluing, welding or the like), thus making it undemountable and hermetically sealed Connection is reached.
  • the working member assembled in this way is then used as a working pair in a bottom-hole screw motor, which is operated as follows.
  • the presence of the sockets 2 and 8 with the screw teeth 4 and 9, which have a very low mass compared to the mass of section I, does not increase the degree of vibration of the working organ and ensures its ability to work at higher loads.
  • the moment of force generated at sections I of the rotor is transmitted to the output shaft of the support element of the downhole screw motor by means of an articulated connection or a flexible shaft (the support element of the motor and other assemblies and parts are not shown in the figures).
  • the inventive design of the working element of a downhole screw motor makes it possible to increase the number of division of the working couple thanks to the connection of the individual sections of the rotors or stators by means of the sockets of the construction according to the invention and to increase the moment of force on the output shaft.
  • the sockets enable one section to be oriented automatically relative to the other, to make the connection point hermetically sealed, to reduce specific loads in the device and the working couple and to improve the functionality. This also increases the bending resistance of the stator teeth.
  • the consumption of scarce, corrosion-resistant steel is saved in the manufacture of the working element, thanks to the use of the tubular sections of the working element, which are connected to one another by means of the likewise hollow part, that is to say the mount, there is the possibility of reducing the rotor mass and thus for the reduction of the dynamics of transverse vibrations of the engine and the associated wear of the working organ.
  • the bottom-hole screw motor with the working element designed according to the invention is used when drilling oil and gas wells, both a rotor and a stator with screw teeth being suitable as the working element of the bottom hole screw motor.

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  • Engineering & Computer Science (AREA)
  • Geology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Mining & Mineral Resources (AREA)
  • Physics & Mathematics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • General Engineering & Computer Science (AREA)
  • Earth Drilling (AREA)
  • Manufacture Of Motors, Generators (AREA)
  • Iron Core Of Rotating Electric Machines (AREA)
EP91910653A 1989-12-08 1989-12-08 Betriebsorgan eines schraubenförmigen antriebes im bohrloch Withdrawn EP0457925A1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/SU1989/000309 WO1991009201A1 (en) 1989-12-08 1989-12-08 Working organ of helical-type down-hole drive for hole drilling

Publications (1)

Publication Number Publication Date
EP0457925A1 true EP0457925A1 (de) 1991-11-27

Family

ID=21617604

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91910653A Withdrawn EP0457925A1 (de) 1989-12-08 1989-12-08 Betriebsorgan eines schraubenförmigen antriebes im bohrloch

Country Status (5)

Country Link
EP (1) EP0457925A1 (no)
JP (1) JPH04503839A (no)
DK (1) DK143691D0 (no)
NO (1) NO913072D0 (no)
WO (1) WO1991009201A1 (no)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999064743A1 (de) * 1998-06-05 1999-12-16 Netzsch-Mohnopumpen Gmbh Rotor für schnecken- und exzenterschneckenpumpen
WO2000029750A1 (de) * 1998-11-13 2000-05-25 Wilhelm Kächele GmbH Elastomertechnik Schnecke für eine exzenterschneckenpumpe oder einen untertagebohrmotor
WO2009056200A1 (de) * 2007-11-02 2009-05-07 Grundfos Management A/S Moineau-pumpe

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU943387A1 (ru) * 1976-10-05 1982-07-15 Пермский Филиал Всесоюзного Ордена Трудового Красного Знамени Научно-Исследовательского Института Буровой Техники Забойный двигатель
DE2840809C3 (de) * 1978-09-20 1981-10-29 Christensen, Inc., 84114 Salt Lake City, Utah Meißeldirektantrieb für Tiefbohrwerkzeuge
FR2558519B1 (fr) * 1984-01-24 1986-06-20 Inst Burovoi Tekhnik Moteur de taille a helice, notamment pour le forage de puits
JPH0633702B2 (ja) * 1986-01-31 1994-05-02 ペルムスキ−、フィリアル、フセソユ−ズノボ、ナウチノ−イスレドワ−チェルスコボ、インスチツ−タ ブロボイ、チェフニキ ねじ形の油圧作動方式の掘削モ−タ、その製造方法、及び、これを実施するための装置

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9109201A1 *

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999064743A1 (de) * 1998-06-05 1999-12-16 Netzsch-Mohnopumpen Gmbh Rotor für schnecken- und exzenterschneckenpumpen
WO2000029750A1 (de) * 1998-11-13 2000-05-25 Wilhelm Kächele GmbH Elastomertechnik Schnecke für eine exzenterschneckenpumpe oder einen untertagebohrmotor
US6544015B1 (en) 1998-11-13 2003-04-08 Wilhelm Kaechele Gmbh Elastomertechnik Worm for an eccentric screw pump or a subsurface drilling motor
WO2009056200A1 (de) * 2007-11-02 2009-05-07 Grundfos Management A/S Moineau-pumpe
EP2063125A1 (de) * 2007-11-02 2009-05-27 Grundfos Management A/S Moineau-Pumpe
US8308459B2 (en) 2007-11-02 2012-11-13 Grundfos Management A/S Moineau pump
CN101842595B (zh) * 2007-11-02 2013-06-05 格伦德福斯管理联合股份公司 螺杆泵

Also Published As

Publication number Publication date
DK143691A (da) 1991-08-06
WO1991009201A1 (en) 1991-06-27
NO913072L (no) 1991-08-07
NO913072D0 (no) 1991-08-07
DK143691D0 (da) 1991-08-06
JPH04503839A (ja) 1992-07-09

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