WO1992019835A1 - Hydraulically driven drilling motor for deep drilling - Google Patents

Hydraulically driven drilling motor for deep drilling Download PDF

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Publication number
WO1992019835A1
WO1992019835A1 PCT/DE1992/000353 DE9200353W WO9219835A1 WO 1992019835 A1 WO1992019835 A1 WO 1992019835A1 DE 9200353 W DE9200353 W DE 9200353W WO 9219835 A1 WO9219835 A1 WO 9219835A1
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WO
WIPO (PCT)
Prior art keywords
drilling
motor
motor housing
housing
rotary pistons
Prior art date
Application number
PCT/DE1992/000353
Other languages
German (de)
French (fr)
Inventor
Viktor Pavlovitsch Dubrovskych
Boris Anatolevitsch Kosnyrjev
Vjatscheslav Aleksejevitsch Kaplun
Belal Nasrulajevitsch Chachajev
Juri Ivanovitsch Schilov
Original Assignee
C. Deilmann Aktiengesellschaft
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 C. Deilmann Aktiengesellschaft filed Critical C. Deilmann Aktiengesellschaft
Publication of WO1992019835A1 publication Critical patent/WO1992019835A1/en

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • 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
    • 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
    • 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
    • E21B4/16—Plural down-hole drives, e.g. for combined percussion and rotary drilling; Drives for multi-bit drilling units

Definitions

  • the invention relates to a hydraulically driven drilling motor for deep drilling with a motor housing, which can be connected to part of a drilling device and contains a plurality of parallel, axially through-flow displacement motors with rotary pistons, and rotatable with one on the motor housing mounted spindle, which can be connected to another part of the drilling device and driven by the displacement motors.
  • a drill motor of the specified type is known from SU-PS 428074.
  • the rotary pistons of the displacement motors working according to the Moineau principle are rotatably mounted in the spindle, the stator housing of the displacement motors being formed partly by a cylinder wall of the spindle surrounding the rotary pistons and partly by an inner wall of the motor housing surrounding the spindle and the inner wall is provided with an inner toothing which meshes with the outer toothing of the rotary pistons.
  • This known design of a drill motor enables the generation of a high torque with a low spindle speed and a small motor length.
  • the disadvantage here is that a complex seal is required between the spindle and the motor housing in order to avoid losses due to leakage currents, particularly in the sections between the displacement motors.
  • the inner wall of the motor housing which is made of an elastomeric material and on which the rotary pistons roll, is additionally in motion due to the drive torque. potential direction, which leads to increased wear and accordingly to a short service life.
  • the object of the invention is to provide a drilling motor of the type mentioned at the outset which enables a high torque with a small axial length and which is distinguished by a favorable efficiency and a long service life.
  • this object is achieved in that the rotary pistons of the displacement motors are rotatably mounted in the motor housing and are coupled to the spindle by a common gear mechanism, and in that the stator housing of the displacement motors in the motor housing for executing an eccentric circular movement about the axis of rotation of the rotary pistons are freely movable and are connected in a rotationally fixed manner to the motor housing via a coupling which compensates for their circular movement.
  • the displacement motors are arranged as independent structural units in the motor housing, the rotary pistons being mounted in a stationary manner, in contrast to the generally customary arrangement, while the stator housings connected in a rotationally fixed manner to the motor housing execute a circular movement about the axis of the rotary pistons.
  • This kinematic arrangement enables simple and robust transmission of the torque from the rotary pistons to a gear transmission which drives the drilling spindle at a reduced speed and a correspondingly higher torque.
  • the design of the positive displacement does not have any special requirements, but can rather correspond to the standard which has been tried and tested in practice, so that a long service life of the engine components can be achieved at low manufacturing costs.
  • the transmission-side ends of the rotary pistons are provided with spur gear teeth.
  • the spindle can have an internally toothed ring gear, in which the spur gear teeth of the rotary pistons engage.
  • This has the particular advantage that a comparatively large transmission ratio can be achieved with a single gear stage and that there are comparatively favorable tooth engagement ratios which enable a long service life of the gear transmission.
  • lubrication of the gear transmission with the aid of the flushing which drives the rotary piston motors can also be provided, so that expensive gearbox encapsulation is not required.
  • stator housings of the displacement motors only carry out a comparatively small relative movement with respect to the motor housing, the sliding speed being comparatively low, it is possible to seal the inlet openings for the working fluid with respect to the motor housing with simple means.
  • the stator housing is sealed on its end face containing the inlet opening with an axial mechanical seal, through the bore of which the working fluid reaches the inlet opening.
  • the rotary piston motors can be installed in the motor housing through openings on the inlet side, the openings being closable by screw-in sleeves against which the mechanical seals rest.
  • the motor housing has axially parallel cylinder bores in which the Housing of the displacement motors are arranged, the inner diameter of the cylinder bores exceeding the diameter of the stator housing by twice the eccentricity of the rotary pistons.
  • This embodiment is particularly suitable for displacement motors based on the Moineau principle, in which the inner wall of the stator housing is formed by an elastomeric body.
  • the cylinder bore provides additional guidance of the stator housing in the radial direction, as a result of which overstressing of the elastomer can be avoided.
  • the spindle can be designed as a sleeve which is mounted on an axle journal of the motor housing which projects through the gearwheel gear. This configuration contributes to a simple and robust construction of the drill motor and favors a robust configuration of the spindle bearing.
  • FIG. 1 shows a view of a drill motor according to the invention, partially cut
  • Figure 2 shows a cross section through the drill motor according to Figure 1 along the line A-A and
  • FIG. 3 shows a cross section through the drill motor according to FIG. 1 along the line B-B
  • the drill motor shown consists of a cylindrical motor housing 1 which can be connected to a drill rod with a threaded connector 2.
  • the motor housing 1 has a central central bore 3 and, parallel to this, three bearing bores 4, which contain hydraulic displacement motors 5 according to the Moineau principle, at a uniform distance from it.
  • the displaced Germotors 5 have a cylindrical stator housing 6, the inner wall of which is formed by a hollow body made of elastomeric material and has a helical toothing which corresponds to the screw displacement principle.
  • a rotary piston 7 likewise provided with helical teeth, the central axis of which is arranged eccentrically to the central axis of the stator housing.
  • the bearing bores 4 have a diameter which is twice the eccentricity between the stator housing 6 and the rotary piston 7 than the stator housing 6, so that the stator housing 6 can move on a circular path with its central axis about the central axis of the rotary piston 7, whose radius corresponds to the eccentricity between the stator housings 6 and the displacement piston 7.
  • Threaded sleeves 8 are screwed into the ends of the bearing holes 4 adjacent to the threaded connector 2. Between the end faces of the stator housing 6 and the sleeves 8 are mechanical seals 9, which produce a tight connection between the bores of the threaded sleeves 8 and inlet openings 10 in the end face of the stator housing 6.
  • the stator housings 6 are connected to the motor housing 1 in a rotationally fixed manner by a coupling ring 11 and freely movable in the radial direction with respect to their longitudinal axis.
  • the lower ends of the rotary pistons 7 protrude from the stator housings 6 and there have spur gear teeth 12 there.
  • a bearing journal 13 adjoins the end toothing 12 and engages in a blind bore of a bearing sleeve 14.
  • the bearing sleeve 14 is of cylindrical basic shape and is located in an end portion of the smaller diameter of the bearing bore 4. The area of the bearing sleeve 14 which is radially outer with respect to the central axis of the motor housing is removed up to the wall of the blind bore.
  • the motor housing 1 has a section which is reduced in diameter and forms an axle journal 16 on which a sleeve Sen-shaped spindle 17 is rotatably mounted.
  • the bearing consists of a multi-row roller bearing 18 for receiving axial and radial forces, and two slide bearings 19 on both sides of the roller bearing 18. With its upper end, the spindle 17 engages in an annular recess 20 which cuts the bearing bores 4 to such an extent that the Front toothing 12 of the rotary piston 7 is exposed radially outward.
  • the upper end of the spindle 17 is provided with an internal toothing 21 which is in engagement with the end toothing 12 of the rotary piston motors 7.
  • the spindle 17 and the rotary pistons 7 thus directly form a gear transmission which considerably reduces the spindle speed compared to the rotary piston speed and increases the drive torque of the spindle.
  • a seal 22 is provided in the outer surface of the spindle 17, which seals the gear mechanism to the outside.
  • the spindle 17 has a connecting thread 23, into which a drilling tool 24 is screwed.
  • a working fluid is supplied via the drill pipe connected to the threaded connector 2 under high pressure, which passes through the sleeves 8 and the inlet openings 10 into the displacement motors and drives the rotary pistons 7.
  • the working fluid exits at reduced pressure through an outlet opening 25 and passes through the bore of the coupling ring 11 and a section of the bearing bores 4 into an outlet bore 26 which opens into the central bore 3.
  • the working fluid is passed through the central bore 3 to the drilling tool 24, where it is used for cooling, lubrication and for the removal of the cuttings.
  • the rotary pistons 7 rotate exclusively about their central axis, which coincides with the central axis of the bearing bores 4.
  • Drive joints and articulated shafts for transmitting the torque from the rotary pistons 7 to the spindle 17 are therefore not necessary.
  • the reaction moment is transmitted from the coupling rings 11 to the motor housing 1 and is discharged via the drill pipe.
  • a high spindle torque is achieved with the described drilling motor, since the torques of several rotary pistons add up, the individual torques being additionally increased by the gear ratio of the gear transmission.
  • the axial overall length of the drill motor can be kept small by using several rotary pistons of comparatively small diameter.
  • the continuous central bore 3 of the drill motor also offers the possibility of use as a core tool, it also being possible to work with rope core tubes.
  • the motor meets all requirements for dealing with emergency situations, including when the drilling tool becomes stuck.

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  • Engineering & Computer Science (AREA)
  • Geology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Mining & Mineral Resources (AREA)
  • Mechanical Engineering (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)
  • Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
  • Hydraulic Motors (AREA)

Abstract

In a hydraulically driven drilling motor for deep drilling with a motor housing (1) which can be coupled to a set of drilling rods (2) and comprises several displacement motors (5) arranged parallel and side by side with the flow passing axially through them, with rotary pistons (7) and a spindle (17) fitted to rotate on the motor housing (1), which can be connected to a drilling tool (24) and driven by the displacement motors (5), the rotary pistons (7) of the displacement motors (5) are fixedly rotatably mounted in the motor housing (1) and coupled to the spindle (17) via a shared gear drive (12, 21) and the stator housings (6) of the displacement motors (5) are arranged to move freely in the motor housing (1) to perform an eccentric circular movement around the axis of rotation of the rotary pistons (7) and fixedly connected to the motor housing (1) via a coupling (11) compensating their circular movement.

Description

Hydraulisch angetriebener Bohrmotor zum Tiefbohren Hydraulically driven drill motor for deep drilling
Die Erfindung betrifft einen hydraulisch angetriebenen Bohr¬ motor zum Tiefbohren mit einem Motorgehäuse, das mit einem Teil einer Bohreinrichtung verbindbar ist und mehrere, paral¬ lel nebeneinander angeordnete, axial durchströmte Verdränger¬ motoren mit Drehkolben enthält, und mit einer an dem Motorge- häuse drehbar gelagerten Spindel, die mit einem anderen Teil der Bohreinrichtung verbindbar und durch die Verdrängermotore antreibbar ist.The invention relates to a hydraulically driven drilling motor for deep drilling with a motor housing, which can be connected to part of a drilling device and contains a plurality of parallel, axially through-flow displacement motors with rotary pistons, and rotatable with one on the motor housing mounted spindle, which can be connected to another part of the drilling device and driven by the displacement motors.
Ein Bohrmotor der angegebenen Art ist aus der SU-PS 428074 be- kannt. Bei diesem bekannten Bohrmotor sind die Drehkolben der nach dem Moineau-Prinzip arbeitenden Verdrängermotoren in der Spindel drehbar gelagert, wobei das Statorgehäuse der Verdrängermotoren teilweise durch eine die Drehkolben umgeben¬ de Zylinderwand der Spindel und teilweise durch eine die Spin- del umgebende Innenwand des Motorgehäuses gebildet ist und wobei die Innenwand mit einer der Außenverzahnung der Drehkol¬ ben kämmenden Innenverzahnung versehen ist. Diese bekannte Ausgestaltung eines Bohrmotors ermöglicht die Erzeugung eines hohen Drehmoments bei geringer Spindeldrehzahl und geringer Motorbaulänge. Nachteilig ist hierbei jedoch, daß zwischen Spindel und Motorgehäuse eine aufwendige Abdichtung erforder¬ lich ist, um Verluste durch Leckströme vor allem in den zwi¬ schen den Verdrängermotoren liegenden Abschnitten zu vermei¬ den. Weiterhin ist die aus einem elastomeren Material be- stehende Innenwand des Motorgehäuses, an der sich die Drehkol¬ ben abwälzen, durch das Antriebsdrehmoment zusätzlich in tan- gentialer Richtung beansprucht, was zu einem erhöhten Ver¬ schleiß und dementsprechend zu einer geringen Lebensdauer führt.A drill motor of the specified type is known from SU-PS 428074. In this known drilling motor, the rotary pistons of the displacement motors working according to the Moineau principle are rotatably mounted in the spindle, the stator housing of the displacement motors being formed partly by a cylinder wall of the spindle surrounding the rotary pistons and partly by an inner wall of the motor housing surrounding the spindle and the inner wall is provided with an inner toothing which meshes with the outer toothing of the rotary pistons. This known design of a drill motor enables the generation of a high torque with a low spindle speed and a small motor length. The disadvantage here, however, is that a complex seal is required between the spindle and the motor housing in order to avoid losses due to leakage currents, particularly in the sections between the displacement motors. Furthermore, the inner wall of the motor housing, which is made of an elastomeric material and on which the rotary pistons roll, is additionally in motion due to the drive torque. potential direction, which leads to increased wear and accordingly to a short service life.
Weiterhin ist es* aus der DE-PS 28 24 441 bekannt, bei einem Erdbohrer mit einer Schlammpumpe und einem Antrieb für einen Bohrmeißel, welcher am vorderen Ende eines in das Bohrloch nachlassbaren Bohrgehäuses mit einer hohlen Antriebswelle ge¬ lagert ist, um die Antriebswelle mehrere Motoren anzuordnen, deren Drehkraft über ein Reduziergetriebe auf die Antriebswel¬ le übertragen wird. Zum Tiefbohren ist dieser bekannte Erdboh¬ rer nicht geeignet.Furthermore, it is * from DE-PS 28 24 441. wherein an auger with a sludge pump, and a drive for a drill bit which is superimposed ge at the front end of a nachlassbaren in the well drill housing with a hollow drive shaft to the drive shaft several Arrange motors whose torque is transmitted to the drive shaft via a reduction gear. This known Erdboh¬ rer is not suitable for deep drilling.
Aufgabe der Erfindung ist es, einen Bohrmotor der eingangs ge- nannten Art zu schaffen, der bei geringer axialer Baulänge ein hohes Drehmoment ermöglicht und der sich durch einen günstigen Wirkungsgrad und eine hohe Lebensdauer auszeichnet.The object of the invention is to provide a drilling motor of the type mentioned at the outset which enables a high torque with a small axial length and which is distinguished by a favorable efficiency and a long service life.
Erfindungsgemäß wird diese Aufgabe dadurch gelöst, daß die Drehkolben der Verdrängermotore im Motorengehäuse ortsfest drehbar gelagert und durch ein gemeinsames Zahnradgetriebe mit der Spindel gekoppelt sind und daß die Statorgehäuse der Ver¬ drängermotore in dem Motorgehäuse zur Ausführung einer exzen¬ trischen Kreisbewegung um die Drehachse der Drehkolben frei beweglich gelagert und über eine ihre Kreisbewegung ausglei¬ chende Kupplung drehfest mit dem Motorgehäuse verbunden sind.According to the invention, this object is achieved in that the rotary pistons of the displacement motors are rotatably mounted in the motor housing and are coupled to the spindle by a common gear mechanism, and in that the stator housing of the displacement motors in the motor housing for executing an eccentric circular movement about the axis of rotation of the rotary pistons are freely movable and are connected in a rotationally fixed manner to the motor housing via a coupling which compensates for their circular movement.
Bei dem erfindungsgemäßen Bohrmotor sind die Verdrängermotore als unabhängige Baueinheiten im Motorgehäuse angeordnet, wobei im Gegensatz zu der allgemein üblichen Anordnung die Drehkol¬ ben ortsfest gelagert sind, während die drehfest mit dem Mo¬ torgehäuse verbundenen Statorgehäuse eine Kreisbewegung um die Achse der Drehkolben ausführen. Diese kinematische Anordnung ermöglicht eine einfache und robuste Übertragung der Drehkraft von den Drehkolben auf ein Zahnradgetriebe, welches mit redu¬ zierter Drehzahl und entsprechend höherem Drehmoment die Bohr¬ spindel antreibt. Die Ausbildung der Verdrängermotore unter- liegt keinen besonderen Anforderungen, sondern kann vielmehr dem in der Praxis bewährten Standard entsprechen, so daß bei günstigen Herstellkosten eine hohe Lebensdauer der Motorenbau¬ teile erreicht werden kann.In the drill motor according to the invention, the displacement motors are arranged as independent structural units in the motor housing, the rotary pistons being mounted in a stationary manner, in contrast to the generally customary arrangement, while the stator housings connected in a rotationally fixed manner to the motor housing execute a circular movement about the axis of the rotary pistons. This kinematic arrangement enables simple and robust transmission of the torque from the rotary pistons to a gear transmission which drives the drilling spindle at a reduced speed and a correspondingly higher torque. The design of the positive displacement does not have any special requirements, but can rather correspond to the standard which has been tried and tested in practice, so that a long service life of the engine components can be achieved at low manufacturing costs.
Erfindungsgemäß kann weiterhin vorgesehen sein, daß die ge- triebeseitigen Enden der Drehkolben mit einer Stirnradverzah¬ nung versehen sind. Hierdurch wird die Ausgestaltung des Bohr¬ motors zusätzlich vereinfacht. Weiterhin kann die Spindel ei- nen innen verzahnten Zahnkranz aufweisen, in den die Stirnrad¬ verzahnung der Drehkolben eingreift. Dies hat vor allem den Vorteil, daß mit einer einzigen Getriebestufe ein vergleichs¬ weise großes Übersetzungsverhältnis erzielt werden kann und daß sich vergleichsweise günstige Zahneingriffsverhältnisse ergeben, die eine hohe Lebensdauer des Zahnradgetriebes ermög¬ lichen. Entsprechend kann auch eine Schmierung des Zahnradge¬ triebes mit Hilfe der die Drehkolbenmotore antreibenden Spü¬ lung vorgesehen sein, so daß eine aufwendige Getriebekapselung entfällt.According to the invention, it can further be provided that the transmission-side ends of the rotary pistons are provided with spur gear teeth. This additionally simplifies the design of the drill motor. Furthermore, the spindle can have an internally toothed ring gear, in which the spur gear teeth of the rotary pistons engage. This has the particular advantage that a comparatively large transmission ratio can be achieved with a single gear stage and that there are comparatively favorable tooth engagement ratios which enable a long service life of the gear transmission. Correspondingly, lubrication of the gear transmission with the aid of the flushing which drives the rotary piston motors can also be provided, so that expensive gearbox encapsulation is not required.
Da die Statorgehäuse der Verdrängermotoren nur eine ver¬ gleichsweise geringe Relativbewegung gegenüber dem Motorenge¬ häuse ausführen, wobei die Gleitgeschwindigkeit verhältnismä¬ ßig niedrig ist, ist das Abdichten der Eintrittsöffnungen für das Arbeitsfluid gegenüber dem Motorengehäuse mit einfachen Mitteln möglich. Erfindungsgemäß kann vorgesehen sein, daß die Statorgehäuse an ihrer die Eintrittsöffnung enthaltenen Stirn¬ seite mit einer axialen Gleitringdichtung abgedichtet sind, durch deren Bohrung das Arbeitsfluid zur Eintrittsöffnung ge- langt. Nach einem weiteren Vorschlag der Erfindung können die Drehkolbenmotoren durch einlaßseitige Öffnungen in das Motor¬ gehäuse einbaubar sein, wobei die Öffnungen durch einschraub¬ bare Hülsen verschließbar sind, an denen die Gleitringdichtun¬ gen anliegen.Since the stator housings of the displacement motors only carry out a comparatively small relative movement with respect to the motor housing, the sliding speed being comparatively low, it is possible to seal the inlet openings for the working fluid with respect to the motor housing with simple means. According to the invention, it can be provided that the stator housing is sealed on its end face containing the inlet opening with an axial mechanical seal, through the bore of which the working fluid reaches the inlet opening. According to a further proposal of the invention, the rotary piston motors can be installed in the motor housing through openings on the inlet side, the openings being closable by screw-in sleeves against which the mechanical seals rest.
Bei einer bevorzugten Ausführungsform der Erfindung weist das Motorgehäuse achsparallele Zylinderbohrungen auf, in denen die Gehäuse der Verdrängermotoren angeordnet sind, wobei der In¬ nendurchmesser der Zylinderbohrungen den Durchmesser der Sta¬ torgehäuse um das Doppelte der Exzentrizität der Drehkolben übersteigt. Diese Ausgestaltung eignet sich vor allem für Ver- drängermotoren nach dem Moineau-Prinzip, bei denen die Innen¬ wand des Statorgehäuses durch einen elastomeren Körper gebil¬ det ist. Bei derartigen Motoren sorgt die Zylinderbohrung für eine zusätzliche Führung des Statorgehäuses in radialer Rich¬ tung, wodurch Überbeanspruchungen des Elastomers vermieden werden können.In a preferred embodiment of the invention, the motor housing has axially parallel cylinder bores in which the Housing of the displacement motors are arranged, the inner diameter of the cylinder bores exceeding the diameter of the stator housing by twice the eccentricity of the rotary pistons. This embodiment is particularly suitable for displacement motors based on the Moineau principle, in which the inner wall of the stator housing is formed by an elastomeric body. In such motors, the cylinder bore provides additional guidance of the stator housing in the radial direction, as a result of which overstressing of the elastomer can be avoided.
Bei einer weiteren Ausführungsform der Erfindung kann die Spindel als Hülse ausgebildet sein, die auf einem durch das Zahnradgetriebe hindurchragenden Achszapfen des Motorengehäu- ses gelagert ist. Diese Ausgestaltung trägt zu einem einfachen und robusten Aufbau des Bohrmotors bei und begünstigt eine robuste Ausgestaltung der Spindellagerung.In a further embodiment of the invention, the spindle can be designed as a sleeve which is mounted on an axle journal of the motor housing which projects through the gearwheel gear. This configuration contributes to a simple and robust construction of the drill motor and favors a robust configuration of the spindle bearing.
Die Erfindung wird nachfolgend anhand eines Ausführungsbei- spiels näher erläutert, das in der Zeichnung dargestellt ist. Es zeigenThe invention is explained in more detail below on the basis of an exemplary embodiment which is illustrated in the drawing. Show it
Figur 1 eine Ansicht eines erfindungsgemäßen Bohrmotors teilweise geschnitten,FIG. 1 shows a view of a drill motor according to the invention, partially cut,
Figur 2 einen Querschnitt durch den Bohrmotor gemäß Figur 1 entlang der Linie A-A undFigure 2 shows a cross section through the drill motor according to Figure 1 along the line A-A and
Figur 3 einen Querschnitt durch den Bohrmotor gemäß Figur 1 entlang der Linie B-B3 shows a cross section through the drill motor according to FIG. 1 along the line B-B
Der dargestellte Bohrmotor besteht aus einem zylindrischen Mo¬ torgehäuse 1, das mit einem Gewindeverbinder 2 an ein Bohrge¬ stänge anschließbar ist. Das Motorgehäuse 1 weist eine zen- trale Mittelbohrung 3 auf und parallel zu dieser in gleichmä¬ ßigem Abstand drei Lagerbohrungen 4, die hydraulische Verdrän¬ germotoren 5 nach dem Moineau-Prinzip enthalten. Die Verdrän- germotore 5 haben ein zylindrisches Statorgehäuse 6, dessen Innenwand durch einen Hohlkörper aus elastomeren Werkstoff ge¬ bildet ist und eine dem Schraubenverdrängerprinzip entspre¬ chende Schrägverzahnung aufweist. In dem Statorgehäuse 6 be- findet sich ein Ebenfalls mit einer Schrägverzahnung versehe¬ ner Drehkolben 7, dessen Mittelachse exzentrisch zur Mittel¬ achse des Statorgehäuses angeordnet ist. Die Lagerbohrungen 4 haben einen um das Doppelte der Exzentrizität zwischen Stator¬ gehäuse 6 und Drehkolben 7 größeren Durchmesser als die Sta- torgehäuse 6, so daß sich die Statorgehäuse 6 mit ihrer Mit¬ telachse um die Mittelachse der Drehkolben 7 auf einer Kreisbahn bewegen können, deren Radius der Exzentrizität zwi¬ schen den Statorgehäusen 6 und den Verdrängerkolben 7 ent¬ spricht.The drill motor shown consists of a cylindrical motor housing 1 which can be connected to a drill rod with a threaded connector 2. The motor housing 1 has a central central bore 3 and, parallel to this, three bearing bores 4, which contain hydraulic displacement motors 5 according to the Moineau principle, at a uniform distance from it. The displaced Germotors 5 have a cylindrical stator housing 6, the inner wall of which is formed by a hollow body made of elastomeric material and has a helical toothing which corresponds to the screw displacement principle. In the stator housing 6 there is a rotary piston 7 likewise provided with helical teeth, the central axis of which is arranged eccentrically to the central axis of the stator housing. The bearing bores 4 have a diameter which is twice the eccentricity between the stator housing 6 and the rotary piston 7 than the stator housing 6, so that the stator housing 6 can move on a circular path with its central axis about the central axis of the rotary piston 7, whose radius corresponds to the eccentricity between the stator housings 6 and the displacement piston 7.
In die dem Gewindeverbinder 2 benachbarten Enden der Lagerboh¬ rungen 4 sind Gewindehülsen 8 eingeschraubt. Zwischen den Stirnseiten der Statorgehäuse 6 und den Hülsen 8 befinden sich Gleitringdichtungen 9, die eine dichte Verbindung zwischen den Bohrungen der Gewindehülsen 8 und Eintrittsöffnungen 10 in der Stirnseite der Statorgehäuse 6 herstellen. An ihren entgegen¬ gesetzten Enden sind die Statorgehäuse 6 durch einen Kupp¬ lungsring 11 drehfest und in radialer Richtung bezogen auf ihre Längsachse frei beweglich mit dem Motorgehäuse 1 verbun- den. Die Drehkolben 7 ragen mit ihren unteren Enden aus den Statorgehäusen 6 heraus und weisen dort eine Stirnverzahnung 12 auf. An die Stirnverzahnung 12 schließt sich ein Lagerzap¬ fen 13 an, der in eine Sackbohrung einer Lagerhülse 14 ein¬ greift. Am Boden der Sackbohrung befindet sich eine Kugel 15, auf der der Lagerzapfen 13 ruht. Die Lagerhülse 14 ist von zylindrischer Grundform und befindet sich in einem Endab¬ schnitt kleineren Durchmessers der Lagerbohrung 4. Der bezogen auf die Mittelachse des Motorgehäuses radial äußere Bereich der Lagerhülse 14 ist bis zur Wand der Sackbohrung entfernt.Threaded sleeves 8 are screwed into the ends of the bearing holes 4 adjacent to the threaded connector 2. Between the end faces of the stator housing 6 and the sleeves 8 are mechanical seals 9, which produce a tight connection between the bores of the threaded sleeves 8 and inlet openings 10 in the end face of the stator housing 6. At their opposite ends, the stator housings 6 are connected to the motor housing 1 in a rotationally fixed manner by a coupling ring 11 and freely movable in the radial direction with respect to their longitudinal axis. The lower ends of the rotary pistons 7 protrude from the stator housings 6 and there have spur gear teeth 12 there. A bearing journal 13 adjoins the end toothing 12 and engages in a blind bore of a bearing sleeve 14. At the bottom of the blind bore there is a ball 15 on which the bearing pin 13 rests. The bearing sleeve 14 is of cylindrical basic shape and is located in an end portion of the smaller diameter of the bearing bore 4. The area of the bearing sleeve 14 which is radially outer with respect to the central axis of the motor housing is removed up to the wall of the blind bore.
Das Motorgehäuse 1 weist einen im Durchmesser verringerten Ab¬ schnitt auf, der einen Achszapfen 16 bildet, auf dem eine hül- senförmige Spindel 17 drehbar gelagert ist. Die Lagerung besteht aus einem mehrreihigen Wälzlager 18 zur Aufnahme axia¬ ler und radialer Kräfte, sowie zwei Gleitlagern 19 beiderseits des Wälzlagers 18. Mit ihrem oberen Ende greift die Spindel 17 in eine ringförmige Ausnehmung 20 ein, die die Lagerbohrungen 4 soweit anschneidet, daß die Stirnverzahnung 12 der Drehkol¬ ben 7 radial nach außen frei liegt. Auf seiner Innenseite ist das obere Ende der Spindel 17 mit einer Innenverzahnung 21 versehen, die mit den Stirnverzahnungen 12 der Drehkolbenmoto- ren 7 in Eingriff ist. Die Spindel 17 und die Drehkolben 7 bilden somit unmittelbar ein Zahnradgetriebe, welches die Spindeldrehzahl gegenüber der Drehkolbendrehzahl erheblich reduziert und das Antriebsmoment der Spindel erhöht. Innerhalb der Ausnehmung 20 ist in der Mantelfläche der Spindel 17 eine Dichtung 22 vorgesehen, die das Zahnradgetriebe nach außen abdichtet. An ihrem anderen Ende weist die Spindel 17 ein An¬ schlußgewinde 23 auf, in das ein Bohrwerkzeug 24 eingeschraubt ist.The motor housing 1 has a section which is reduced in diameter and forms an axle journal 16 on which a sleeve Sen-shaped spindle 17 is rotatably mounted. The bearing consists of a multi-row roller bearing 18 for receiving axial and radial forces, and two slide bearings 19 on both sides of the roller bearing 18. With its upper end, the spindle 17 engages in an annular recess 20 which cuts the bearing bores 4 to such an extent that the Front toothing 12 of the rotary piston 7 is exposed radially outward. On its inside, the upper end of the spindle 17 is provided with an internal toothing 21 which is in engagement with the end toothing 12 of the rotary piston motors 7. The spindle 17 and the rotary pistons 7 thus directly form a gear transmission which considerably reduces the spindle speed compared to the rotary piston speed and increases the drive torque of the spindle. Inside the recess 20, a seal 22 is provided in the outer surface of the spindle 17, which seals the gear mechanism to the outside. At its other end, the spindle 17 has a connecting thread 23, into which a drilling tool 24 is screwed.
Beim Betrieb des Bohrmotors wird über das an dem Gewindever¬ binder 2 angeschlossene Bohrgestänge unter hohem Druck ein Arbeitsfluid zugeführt, welches durch die Hülsen 8 und die Eintrittsöffnungen 10 in die Verdrängermotore gelangt und die Drehkolben 7 antreibt. Am unteren Ende der Statorgehäuse 6 tritt das Arbeitsfluid mit vermindertem Druck durch eine Aus- laβöffnung 25 aus und gelangt durch die Bohrung des Kupplungs¬ rings 11 und einen Abschnitt der Lagerbohrungen 4 in eine Aus¬ laßbohrung 26, die in die Mittelbohrung 3 mündet. Durch die Mittelbohrung 3 wird das Arbeitsfluid zum Bohrwerkzeug 24 ge- leitet, wo es zur Kühlung, Schmierung und zum Abtransport des Bohrkleins dient.When the drill motor is operating, a working fluid is supplied via the drill pipe connected to the threaded connector 2 under high pressure, which passes through the sleeves 8 and the inlet openings 10 into the displacement motors and drives the rotary pistons 7. At the lower end of the stator housing 6, the working fluid exits at reduced pressure through an outlet opening 25 and passes through the bore of the coupling ring 11 and a section of the bearing bores 4 into an outlet bore 26 which opens into the central bore 3. The working fluid is passed through the central bore 3 to the drilling tool 24, where it is used for cooling, lubrication and for the removal of the cuttings.
Bei dem beschriebenen Bohrmotor rotieren die Drehkolben 7 aus¬ schließlich um ihre Mittelachse, die mit der Mittelachse der Lagerbohrungen 4 zusammenfällt. Antriebsgelenke und Gelenkwel¬ len zur Übertragung der Drehkraft von den Drehkolben 7 auf die Spindel 17 sind daher nicht erforderlich. Das Reaktionsmoment wird von den Kupplungsringen 11 auf das Motorgehäuse 1 über¬ tragen und über das Bohrgestänge abgeleitet. Mit dem beschrie¬ benen Bohrmotor wird ein hohes Spindeldrehmoment erreicht, da sich die Drehmomente mehrerer Drehkolben addieren, wobei die Einzeldrehmomente durch das Übersetzungsverhältnis des Zahn¬ radgetriebes zusätzlich erhöht werden. Gleichzeitig kann die axiale Baulänge des Bohrmotors durch die Verwendung mehrerer Drehkolben von vergleichsweisen geringem Durchmesser klein gehalten werden. Dies ist vor allem vorteilhaft, um bei gege- benem Bohrdurchmesser ohne zusätzliche Gelenke kleine Ablenk¬ radien bohren zu können. Die durchgehende Mittelbohrung 3 des Bohrmotors bietet weiterhin die Möglichkeit einer Verwendung als Kernwerkzeug, wobei auch mit Seilkernrohren gearbeitet werden kann. Zusätzlich entspricht der Motor allen Anforderun- gen zur Begegnung von Havariesituationen, auch beim Festwerden des Bohrwerkzeugs. In the drilling motor described, the rotary pistons 7 rotate exclusively about their central axis, which coincides with the central axis of the bearing bores 4. Drive joints and articulated shafts for transmitting the torque from the rotary pistons 7 to the spindle 17 are therefore not necessary. The reaction moment is transmitted from the coupling rings 11 to the motor housing 1 and is discharged via the drill pipe. A high spindle torque is achieved with the described drilling motor, since the torques of several rotary pistons add up, the individual torques being additionally increased by the gear ratio of the gear transmission. At the same time, the axial overall length of the drill motor can be kept small by using several rotary pistons of comparatively small diameter. This is particularly advantageous in order to be able to drill small deflection radii for a given drilling diameter without additional joints. The continuous central bore 3 of the drill motor also offers the possibility of use as a core tool, it also being possible to work with rope core tubes. In addition, the motor meets all requirements for dealing with emergency situations, including when the drilling tool becomes stuck.

Claims

P A T E N T A N S P R Ü C H E PATENT CLAIMS
1. Hydraulisch angetriebener Bohrmotor zum Tiefbohren mit einem Motorgehäuse, das mit einem Teil einer Bohrein¬ richtung verbindbar ist und mehrere, parallel nebenein¬ ander angeordnete, axial durchströmte Verdrängermotoren mit Drehkolben enthält, und mit einer an dem Motorgehäu¬ se drehbar gelagerten Spindel, die mit einem anderen Teil der Bohreinrichtung verbindbar und durch die Ver¬ drängermotore antreibbar ist, dadurch gekennzeichnet, daß die Drehkolben der Verdrängermotore im Motorengehäu- se ortsfest drehbar gelagert und durch ein gemeinsames Zahnradgetriebe mit der Spindel gekoppelt sind und daß die Statorgehäuse der Verdrängermotore in dem Motorge¬ häuse zur Ausführung einer exzentrischen Kreisbewegung um die Drehachse der Drehkolben frei beweglich gelagert und über eine ihre Kreisbewegung ausgleichende Kupplung drehfest mit dem Motorgehäuse verbunden sind.1. Hydraulically driven drilling motor for deep drilling with a motor housing, which can be connected to part of a drilling device and contains a plurality of parallel, axially flow-displaced displacement motors with rotary pistons, and with a spindle which is rotatably mounted on the motor housing and which can be connected to another part of the drilling device and can be driven by the displacement motors, characterized in that the rotary pistons of the displacement motors in the motor housing are rotatably mounted in a stationary manner and are coupled to the spindle by a common gear mechanism and in that the stator housing of the displacement motors in the motor area ¬ housing for executing an eccentric circular movement about the axis of rotation of the rotary pistons freely movable and rotatably connected to the motor housing via a coupling compensating for their circular movement.
2. Bohrmotor nach Anspruch 1, dadurch gekennzeichnet, daß die getriebeseitigen Enden der Drehkolben mit einer Stirnradverzahnung versehen sind.2. Drilling motor according to claim 1, characterized in that the transmission-side ends of the rotary pistons are provided with spur gear teeth.
3. Bohrmotor nach einem der vorhergehenden Ansprüche, da¬ durch gekennzeichnet, daß die Spindel einen innen ver¬ zahnten Zahnkranz aufweist, in den die Stirnradverzah- nung der Drehkolben eingreift.3. Drilling motor according to one of the preceding claims, characterized in that the spindle has an internally toothed ring gear in which the spur gear teeth of the rotary pistons engage.
4. Bohrmotor nach einem der vorhergehenden Ansprüche, da¬ durch gekennzeichnet, daß die Statorgehäuse an ihrer die Eintrittsöffnung enthaltenen Stirnseite mit einer axia- len Gleitringdiσhtung abgedichtet sind, durch deren Boh¬ rung das Arbeitsfluid zur Eintrittsöffnung gelangt. 4. Drilling motor according to one of the preceding claims, characterized in that the stator housing is sealed on its end face containing the inlet opening with an axial slide ring diaphragm, through whose bore the working fluid reaches the inlet opening.
5. Bohrmotor nach einem der vorhergehenden Ansprüche, da¬ durch gekennzeichnet, daß die Drehkolbenmotoren durch einlaßseitige Öffnungen in das Motorgehäuse einbaubar sind, wobei die Öffnungen durch einschraubbare Hülsen5. Drilling motor according to one of the preceding claims, da¬ characterized in that the rotary lobe motors can be installed through inlet-side openings in the motor housing, the openings through screw-in sleeves
*» verschließbar sind, an denen die Gleitringdichtungen an¬ liegen.* »Are closable, against which the mechanical seals lie.
6. Bohrmotor nach einem der vorhergehenden Ansprüche, da¬ durch gekennzeichnet, daß das Motorgehäuse achsparallele Zylinderbohrungen aufweist, in denen die Gehäuse der Verdrängermotoren angeordnet sind, wobei der Innendurch¬ messer der Zylinderbohrungen den Durchmesser der Stator¬ gehäuse um das Doppelte der Exzentrizität der Drehkolben übersteigt.6. Drilling motor according to one of the preceding claims, characterized in that the motor housing has axially parallel cylinder bores in which the housings of the displacement motors are arranged, the inner diameter of the cylinder bores being the diameter of the stator housing by twice the eccentricity of the rotary pistons exceeds.
7. Bohrmotor nach einem der vorhergehenden Ansprüche, da¬ durch gekennzeichnet, daß die Spindel als Hülse ausge¬ bildet ist, die auf einem durch das Zahnradgetriebe hin¬ durchragenden Achszapfen des Motorengehäuses gelagert ist. 7. Drilling motor according to one of the preceding claims, characterized in that the spindle is formed as a sleeve which is mounted on an axle journal of the motor housing which projects through the gear mechanism.
PCT/DE1992/000353 1991-04-29 1992-04-28 Hydraulically driven drilling motor for deep drilling WO1992019835A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19914113986 DE4113986A1 (en) 1991-04-29 1991-04-29 HYDRAULIC DRILLING MOTOR FOR DEEP DRILLING
DEP4113986.0 1991-04-29

Publications (1)

Publication Number Publication Date
WO1992019835A1 true WO1992019835A1 (en) 1992-11-12

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ID=6430606

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Application Number Title Priority Date Filing Date
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Country Status (3)

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DE (1) DE4113986A1 (en)
WO (1) WO1992019835A1 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1996024727A1 (en) * 1995-02-07 1996-08-15 Hollandsche Beton Groep N.V. Device for creating a local water flow
WO2012109109A2 (en) * 2011-02-08 2012-08-16 Halliburton Energy Services, Inc. Multiple motor/pump array
CN106930684A (en) * 2015-12-29 2017-07-07 中石化石油工程技术服务有限公司 Planet milling formula broken rock device
WO2022208095A1 (en) * 2021-04-01 2022-10-06 Steel Space Casing Drilling Ltd Downhole rotary drive apparatus

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6173794B1 (en) 1997-06-30 2001-01-16 Intedyne, Llc Downhole mud motor transmission
US5911284A (en) * 1997-06-30 1999-06-15 Pegasus Drilling Technologies L.L.C. Downhole mud motor
GB2418456B (en) * 2003-06-23 2007-02-21 Schlumberger Holdings Inner and outer motor with eccentric stabilizser
DE102014211710A1 (en) * 2014-06-18 2015-12-24 Aktiebolaget Skf Drill motor bearing assembly

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU428074A1 (en) * 1972-07-31 1974-05-15 М. Т. Гусман, Д. Ф. Балденко, А. М. Кочнев , С. С. Никомаров
FR2382574A1 (en) * 1977-03-03 1978-09-29 Me Co Gruppi Perforazioni Self-penetrating soil borer - with lobed multi-unit housing for guidance in fluted borehole
DE2824441A1 (en) * 1977-06-06 1978-12-14 Tokyo Keiki Kk Ground drill for underwater boring - has hollow main drill shaft with rotor alongside also reamers hinged to tool for swivelling out as piston ascends in cylinder on shaft
US4133397A (en) * 1977-09-19 1979-01-09 Smith International, Inc. Drilling with multiple in-hole motors

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2483370A (en) * 1946-06-18 1949-09-27 Robbins & Myers Helical multiple pump
US3304838A (en) * 1965-02-12 1967-02-21 Harry W Mcdonald Fluid operated motor for drilling mechanism
SU463770A1 (en) * 1972-10-10 1975-03-15 Hydraulic downhole motor
SU1384701A1 (en) * 1981-02-13 1988-03-30 Всесоюзный Научно-Исследовательский Институт Буровой Техники Hydraulic drilling unit

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU428074A1 (en) * 1972-07-31 1974-05-15 М. Т. Гусман, Д. Ф. Балденко, А. М. Кочнев , С. С. Никомаров
FR2382574A1 (en) * 1977-03-03 1978-09-29 Me Co Gruppi Perforazioni Self-penetrating soil borer - with lobed multi-unit housing for guidance in fluted borehole
DE2824441A1 (en) * 1977-06-06 1978-12-14 Tokyo Keiki Kk Ground drill for underwater boring - has hollow main drill shaft with rotor alongside also reamers hinged to tool for swivelling out as piston ascends in cylinder on shaft
US4133397A (en) * 1977-09-19 1979-01-09 Smith International, Inc. Drilling with multiple in-hole motors

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1996024727A1 (en) * 1995-02-07 1996-08-15 Hollandsche Beton Groep N.V. Device for creating a local water flow
US6053663A (en) * 1995-02-07 2000-04-25 Dikken; Jacob Jan Device for creating a local water flow
WO2012109109A2 (en) * 2011-02-08 2012-08-16 Halliburton Energy Services, Inc. Multiple motor/pump array
WO2012109109A3 (en) * 2011-02-08 2013-01-03 Halliburton Energy Services, Inc. Multiple motor/pump array
US9580965B2 (en) 2011-02-08 2017-02-28 Halliburton Energy Services, Inc. Multiple motor/pump array
CN106930684A (en) * 2015-12-29 2017-07-07 中石化石油工程技术服务有限公司 Planet milling formula broken rock device
WO2022208095A1 (en) * 2021-04-01 2022-10-06 Steel Space Casing Drilling Ltd Downhole rotary drive apparatus
GB2609885A (en) * 2021-04-01 2023-02-22 Steel Space Casing Drilling Ltd Downhole rotary drive apparatus
GB2609885B (en) * 2021-04-01 2023-10-18 Steel Space Casing Drilling Ltd Downhole rotary drive apparatus

Also Published As

Publication number Publication date
DE4113986A1 (en) 1992-11-12
AU1657192A (en) 1992-12-21

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