EP0214554B1 - Down-hole device for transmitting information from a well - Google Patents

Down-hole device for transmitting information from a well Download PDF

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Publication number
EP0214554B1
EP0214554B1 EP86111862A EP86111862A EP0214554B1 EP 0214554 B1 EP0214554 B1 EP 0214554B1 EP 86111862 A EP86111862 A EP 86111862A EP 86111862 A EP86111862 A EP 86111862A EP 0214554 B1 EP0214554 B1 EP 0214554B1
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EP
European Patent Office
Prior art keywords
valve
pressure
inner pipe
housing
drill string
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
Application number
EP86111862A
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German (de)
French (fr)
Other versions
EP0214554A2 (en
EP0214554A3 (en
Inventor
Heinz Dipl.-Ing. Wallussek
Michael Dipl.-Ing. Ostkämper
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.)
Bergwerksverband GmbH
Schwing Hydraulik Elektronik GmbH and Co
Original Assignee
Bergwerksverband GmbH
Schwing Hydraulik Elektronik GmbH and Co
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 Bergwerksverband GmbH, Schwing Hydraulik Elektronik GmbH and Co filed Critical Bergwerksverband GmbH
Priority to AT86111862T priority Critical patent/ATE48179T1/en
Publication of EP0214554A2 publication Critical patent/EP0214554A2/en
Publication of EP0214554A3 publication Critical patent/EP0214554A3/en
Application granted granted Critical
Publication of EP0214554B1 publication Critical patent/EP0214554B1/en
Expired legal-status Critical Current

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    • 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
    • E21B47/00—Survey of boreholes or wells
    • E21B47/12—Means for transmitting measuring-signals or control signals from the well to the surface, or from the surface to the well, e.g. for logging while drilling
    • E21B47/14—Means for transmitting measuring-signals or control signals from the well to the surface, or from the surface to the well, e.g. for logging while drilling using acoustic waves
    • E21B47/18—Means for transmitting measuring-signals or control signals from the well to the surface, or from the surface to the well, e.g. for logging while drilling using acoustic waves through the well fluid, e.g. mud pressure pulse telemetry

Definitions

  • the invention relates to a target boring bar according to the preamble of claim 1.
  • Such a target boring bar is known from EP-A 0 134 467. It consists of an inner tube rotatably arranged in a fixed outer tube.
  • a target boring bar is a drill pipe installed in the drill string train, which receives and transmits measured values that come from measuring devices and monitors in the target boring bar. The measured values give the course of the bore, d. H. Information about any deviations from a predefined direction of the borehole, while the guards provide measured values which enable the functional monitoring of the various devices of such a target boring bar and which are provided with a device for correcting the drilling.
  • Such a device usually consists of a plurality of control strips pivotally mounted on the outer tube, which are supported on the joints of the borehole and can be individually adjusted via hydraulically actuatable cylinders in order to correct the direction of the drill pipe.
  • the flushing flow pressure-modulated in this way can be measured at the borehole exit, as a result of which the pressure pulses can be received by a receiver and converted into electrical quantities for transmission.
  • the energy required to actuate the measuring instruments arranged on the target boring bar, the control strips etc. is either generated by a generator which is driven by the rotating inner bar or by an electric motor.
  • the flushing liquid serves as the transmission medium for the electrical measuring pulses, which is converted into a sequence of pressure pulses by the throttle valve.
  • this principle is only made possible by the miniaturization of the transducer, which can therefore be accommodated in the restricted spatial conditions, while at the same time ensuring the required form of the pressure pulses.
  • This miniaturization of the transducer is done by moving all parts and assemblies downstream of the throttle valve into the outer tube, while the arrangement and design of the throttle valve can generate pressure pulses that are accessible for precise evaluation.
  • the throttle valve is arranged transversely to the drill pipe direction in a corresponding recess in the inner tube.
  • valve body and the recess are exposed to the abrasive flushing flow medium.
  • the transverse arrangement of the valve body requires a very small size, so that the unprotected small valve body is quickly worn out and destroyed by the abrasive forces of the flushing flow.
  • solid particles settle in the recess in which the valve is guided, as deposits, which in a relatively short time result in the valve becoming stiff and ultimately becoming stuck.
  • the invention is therefore based on the object of executing a target boring bar of the type mentioned in such a way that destruction of the valve by abrasion is counteracted and the drive elements of the valve are removed from the abrasive forces of the flushing flow.
  • the invention solves this problem with the aid of the features of the characterizing part of claim 1.
  • the invention has the advantage that, in addition to the signals supplied by the inclinometers, a large number of further data of the target boring bar can also be transmitted to the outside.
  • the required measuring devices and monitors can be accommodated in the standing and therefore relatively less mechanically stressed outer tube and only the signals they deliver after conversion into hydraulic and mechanical pulses for the throttle valve can be transferred to the flushing flow.
  • the throttle valve according to the invention is arranged in the flushing flow channel so as to be displaceable in the axial direction, so that the flushing flow flows around it in a favorable manner in a ring. It therefore offers the abrasive forces in the flushing flow fewer opportunities for attack, which results in a longer service life.
  • the flushing medium has no possibility of coming into contact with the drive and movement units of the valve. This prevents the valve assembly from becoming stuck due to deposits. Only the valve itself and the webs are exposed to the flushing liquid flow, while all sensitive devices such as measuring instruments, transducers, throttle valve drives and the energy supply are either arranged in the outer tube, which is less stressed, or in rooms sealed against the flushing liquid.
  • the valve is designed on the inflow side as a streamlined cap which can be displaced in the axial direction on the hollow body and on the outflow side as a streamlined cap which can be displaced in the axial direction in the hollow body.
  • a hydraulic or pneumatic drive can be provided, in which the valve body can be actuated through bores in the inner tube and in webs of the hollow body via a pressure medium supply arranged in the outer tube, the valve having two hermetically sealed chambers, in each of which one of the holes opens. If the upstream chamber is supplied with hydraulic or pneumatic pressure medium, the cap pushes against the valve seat and reduces the flow cross-section or completely prevents the flow. The cap sits on the outer circumference of the hollow body.
  • the valve can be actuated by levers which engage the valve and are driven by drives arranged in the outer tube.
  • the levers can be designed as fork rockers that can be inserted through the webs and are mounted on the hollow body.
  • the fork rockers actuated by the drive in turn actuate a piston which is arranged in the hollow body and displaces the caps in or against the direction of flow.
  • a hydraulically or pneumatically operable ring piston is provided as the drive for the levers and is mounted in the outer tube.
  • the lever ends on the drive side are arranged on a rotary bearing, the fixed part of which is attached to the annular piston.
  • the lever ends on the drive side can also be actuated electromechanically or electromagnetically, however, the valve can also be driven directly electromagnetically or electromechanically.
  • a target boring bar is generally provided with the reference symbol 1 in a broken representation. It consists of an outer tube 2 which is fixed in the borehole and which is provided on its outside with control bars, not shown, which are pivotally mounted thereon, which are supported on the borehole wall and can be individually adjusted via hydraulically actuatable cylinders in order to correct the direction of the drill pipe.
  • An inner tube 3 is rotatably mounted in the outer tube 2. Connected in a rotationally fixed manner to the inner tube 3, a throttle valve, generally designated 4, is arranged concentrically therein.
  • the throttle valve 4 consists of an annular base body 5, in which a hollow body 6 is concentrically attached, which is connected to the base body 5 via webs 7 and 8.
  • the webs 7 and 8 are hollow on the inside and are aligned with openings 9 and 10 in the inner tube 3.
  • the openings 9 and 10 open into chambers 11 which are guided in a ring around the inner tube 3 in the outer tube 2.
  • the base body 5 is open on both sides, one side 12 being tapered.
  • the hollow body 6 is also open on both sides.
  • the hollow body 6 has a further cap 16, which, however, is guided as a piston in the cylinder formed by the end of the hollow body and is sealed against the hollow body 6 with ring seals 17 and 18.
  • the caps 13 and 16 are connected to a rod 19. Where the rod 19 passes the web area, the ends 20 and 21 on the driven side are engaged by levers designed as rocker arms 22 and 23 on the rod 19.
  • the fork rockers 22 and 23 are rotatably mounted on the base body 5.
  • the drive-side ends 24 and 25 of the fork rockers 22 and 23 are fastened to pins 26.
  • the pins 26 are arranged on a ring 27 which is guided around the inner tube 3 and rotatably mounted on rotary bearings 28 which are fastened to an annular piston 29.
  • the annular piston 29 can only be displaced in the axial direction.
  • the annular piston 29 is e.g. pressurized with pressure medium channels 30 and 31.
  • the ring piston and the pressure medium channels are sealed against the outer tube 2.
  • the fork rockers 22 and 23 move the rod 19 in the opposite direction.
  • the rod 19, on which the caps 13 and 16 are arranged thus displaces the caps 13 and 16 either in the direction of the tapered opening 12 of the base body 5, in the extreme case the cap 13 resting on the edge of the opening 12.
  • the opening 12 opens into the flushing liquid channel 35, which leads the flushing liquid from the hole mouth, not shown, to the drill bit, also not shown.
  • the rinsing liquid flows towards the cap 13, past it, the hollow body 6 and the cap 16, to the drill bit.
  • the actuation of the annular piston 29 leads to the displacement of the caps 13 and 16 and thus to changes in the cross section of the flushing liquid cross section.
  • pressure pulses are transmitted to the flushing liquid stream, which are collected and processed by suitable instruments at the mouth of the borehole.
  • the annular space 11 is accessible via the cover 36 for installing the fork rockers and for maintenance work.
  • FIGS. 2 and 3 A further embodiment of the device according to the invention is shown in FIGS. 2 and 3, the same parts as in FIG. 1 being provided with the same reference symbols.
  • the caps 13 and 16 are actuated hydraulically or pneumatically.
  • An annular piston is therefore no longer required, as is the fork rocker.
  • channels 40 and 41 and 42 and 43 are provided in the webs, which are aligned with channels 44 to 47 in the inner tube 3.
  • the channels 40 to 47 are acted upon by a pressure medium supply, not shown, in the outer tube 2.
  • the channels 40 to 43 open into two separate chambers 48 and 49 in the hollow body 6.
  • the pressure medium flows into the chambers 48 or 49 and thus presses either the cap 13 to the opening 12 or the cap 16 to the opposite th opening of the base body 5, resulting in the above-mentioned pressure pulse generation in the liquid flow.
  • the diameter ratios of d1, d2 and d3 result in the possibility of hydrostatic pressure compensation.
  • the flow resistance body (caps 13 and 16 and hollow body 6) is hydrostatically pressure-compensated and does not experience any axial displacement due to the external pressure forces.

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Mining & Mineral Resources (AREA)
  • Geology (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • Geophysics (AREA)
  • Remote Sensing (AREA)
  • Acoustics & Sound (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geophysics And Detection Of Objects (AREA)
  • Earth Drilling (AREA)
  • Arrangements For Transmission Of Measured Signals (AREA)
  • Devices For Checking Fares Or Tickets At Control Points (AREA)
  • Measuring Pulse, Heart Rate, Blood Pressure Or Blood Flow (AREA)
  • Radar Systems Or Details Thereof (AREA)
  • Measuring Fluid Pressure (AREA)
  • Drilling And Exploitation, And Mining Machines And Methods (AREA)
  • Time-Division Multiplex Systems (AREA)

Abstract

A choker valve assembly for a drill string is provided for transmitting information measured in an underground bore hole by sensing devices, to the surface by modulating the pressure of the flushing fluid. The valve assembly includes a housing that is non-rotatably connected within the flushing fluid flow passage by cross-pieces extending between the housing and a portion of the inner pipe wall. A drag body valve element is mounted by the housing and is axially displaceable with respect to a tapered restriction portion of the inner pipe. Drive means for displacing the valve element is located outside the housing and extends between the valve element and the pipe wall through the cross-pieces. A cap is provided on each end of the valve element. The cap facing the direction of flushing fluid flow extends beyond the perimeter of the housing and the cap facing away from the direction of flushing fluid flow is entirely within the perimeter of the housing to provide a hydrodynamically pressure-compensated choker valve assembly.

Description

Die Erfindung betrifft eine Zielbohrstange gemäß dem Oberbegriff des Anspruchs 1.The invention relates to a target boring bar according to the preamble of claim 1.

Eine derartige Zielbohrstange ist aus der EP-A 0 134 467 bekannt. Es besteht aus einem drehbar in einem feststehenden Außenrohr angeordneten Innenrohr. Allgemein gesehen ist eine zielbohrstange ein in den Bohrgestängezug eingebautes Bohrrohr, welches Meßwerte aufnimmt und weitergibt, die von Meßgeräten und Wächtern in der Zielbohrstange stammen. Die Meßwerte geben über den Verlauf der Bohrung, d. h. über etwaige Abweichungen von einer vorgegebenen Bohrlochrichtung Auskunft, während die Wächter Meßwerte liefern, welche die Funktionsüberwachung der verschiedenen Einrichtungen einer solchen Zielbohrstange ermöglichen und welche mit einer Einrichtung zur Korrektur der Bohrung versehen sind. Eine solche Einrichtung besteht in der Regel aus mehreren, am Außenrohr schwenkbar gelagerten Steuerleisten, die sich auf den Stößen des Bohrloches abstützen und über hydraulisch beaufschlagbare Zylinder einzeln verstellt werden können, um die Richtung des Bohrgestänges zu korrigieren. Als telemetrische Einrichtung dient der durch den Spülkanal verlaufende Spülstrom und ein hydraulischer Wandler, welcher die elektrischen Signale in Druckimpulse der Spülung umsetzt. Der so druckmodulierte Spülstrom kann am Bohrlochausgang vermessen werden, wodurch sich die Druckimpulse von einem Empfänger aufnehmen und zur Weiterleitung in elektrische Größen umwandeln lassen. Die zur Betätigung der an der Zielbohrstange angeordneten Meßinstrumente, der Steuerleisten etc. notwendige Energie wird entweder durch einen Generator erzeugt, der von der drehenden Innenstange angetrieben wird oder durch einen Elektromotor. Als Übertragungsmedium der elektrischen Meßimpulse, welche durch das Drosselventil in eine Folge von Druckimpulsen umgewandelt wird, dient die Spülflüssigkeit. Dieses Prinzip wird bei der der Erfindung zugrundeliegenden Zielbohrstange erst durch die Miniaturisierung des Wandlers ermöglicht, der sich deswegen in den beschränkten räumlichen Verhältnissen unterbringen läßt, wobei gleichzeitig für die erforderliche Form der Druckimpulse gesorgt wird. Diese Miniaturisierung des Wandlers geschieht durch die Verlegung aller dem Drosselventil nachgeordneten Teile und Baugruppen in das Außenrohr, während durch die Anordnung und Ausbildung des Drosselventils Druckimpulse erzeugt werden können, die einer genauen Auswertung zugänglich sind. Bei der vorbekannten Zielbohrstange ist das Drosselventil jedoch quer zur Bohrgestängerichtung in einer entsprechenden Aussparung im Innenrohr angeordnet. Sowohl der Ventilkörper als auch die Aussparung sind dem abrasiven Spülstrommedium ausgesetzt. Die Queranordnung des Ventilkörpers bedingt dabei eine sehr geringe Baugröße, so daß der ungeschützte kleine Ventilkörper durch die abrasiven Kräfte des Spülstroms schnell verschleißt und zerstört wird. Gleichzeitig setzen sich in der Aussparung, in der das Ventil geführt ist, Feststoffteilchen als Ablagerungen ab, die in relativ kurzer Zeit dazu führen, daß das Ventil schwergängig wird und sich im Endeffekt festsetzt.Such a target boring bar is known from EP-A 0 134 467. It consists of an inner tube rotatably arranged in a fixed outer tube. Generally speaking, a target boring bar is a drill pipe installed in the drill string train, which receives and transmits measured values that come from measuring devices and monitors in the target boring bar. The measured values give the course of the bore, d. H. Information about any deviations from a predefined direction of the borehole, while the guards provide measured values which enable the functional monitoring of the various devices of such a target boring bar and which are provided with a device for correcting the drilling. Such a device usually consists of a plurality of control strips pivotally mounted on the outer tube, which are supported on the joints of the borehole and can be individually adjusted via hydraulically actuatable cylinders in order to correct the direction of the drill pipe. The flushing flow through the flushing channel and a hydraulic converter, which converts the electrical signals into pressure pulses during the flushing, serve as the telemetric device. The flushing flow pressure-modulated in this way can be measured at the borehole exit, as a result of which the pressure pulses can be received by a receiver and converted into electrical quantities for transmission. The energy required to actuate the measuring instruments arranged on the target boring bar, the control strips etc. is either generated by a generator which is driven by the rotating inner bar or by an electric motor. The flushing liquid serves as the transmission medium for the electrical measuring pulses, which is converted into a sequence of pressure pulses by the throttle valve. In the target boring bar on which the invention is based, this principle is only made possible by the miniaturization of the transducer, which can therefore be accommodated in the restricted spatial conditions, while at the same time ensuring the required form of the pressure pulses. This miniaturization of the transducer is done by moving all parts and assemblies downstream of the throttle valve into the outer tube, while the arrangement and design of the throttle valve can generate pressure pulses that are accessible for precise evaluation. In the known target boring bar, however, the throttle valve is arranged transversely to the drill pipe direction in a corresponding recess in the inner tube. Both the valve body and the recess are exposed to the abrasive flushing flow medium. The transverse arrangement of the valve body requires a very small size, so that the unprotected small valve body is quickly worn out and destroyed by the abrasive forces of the flushing flow. At the same time, solid particles settle in the recess in which the valve is guided, as deposits, which in a relatively short time result in the valve becoming stiff and ultimately becoming stuck.

Der Erfindung liegt daher die Aufgabe zugrunde, eine Zielbohrstange der eingangs genannten Art so auszuführen, daß einer Zerstörung des Ventils durch Abrasion entgegengewirkt wird und die Antriebsorgane des Ventils den abrasiven Kräften des Spülstroms entzogen sind.The invention is therefore based on the object of executing a target boring bar of the type mentioned in such a way that destruction of the valve by abrasion is counteracted and the drive elements of the valve are removed from the abrasive forces of the flushing flow.

Die Erfindung löst diese Aufgabe mit Hilfe der Merkmale des kennzeichnenden Teils des Anspruchs 1.The invention solves this problem with the aid of the features of the characterizing part of claim 1.

Weitere vorteilhafte Ausführungsformen der Erfindung sind Gegenstand der Unteransprüche.Further advantageous embodiments of the invention are the subject of the dependent claims.

Die Erfindung hat den Vorteil, daß außer den von den Neigungsmessern gelieferten Signalen auch eine Vielzahl von weiteren Daten der Zielbohrstange nach außen übertragen werden kann. Dabei lassen sich die dazu erforderlichen Meßgeräte und Wächter in dem stehenden und daher verhältnismäßig weniger mechanisch belasteten Außenrohr unterbringen und lediglich die von ihnen gelieferten Signale nach Wandlung in hydraulische und mechanische Impulse für das Drosselventil auf den Spülstrom übertragen. Das Drosselventil gemäß der Erfindung ist in axialer Richtung verschiebbar im Spülstromkanal angeordnet, so daß es in günstiger Weise von dem Spülstrom ringförmig umströmt wird. Es bietet somit den abrasiven Kräften im Spülstrom weniger Angriffsmöglichkeiten, wodurch eine längere Lebensdauer erreicht wird. Darüberhinaus hat das Spülmedium keinerlei Möglichkeit, mit den Antriebs-und Bewegungsaggregaten des Ventils in Berührung zu kommen. Somit ist ein Festsetzen der Ventilanordnung durch Ablagerungen ausgeschlossen. Einzig und allein das Ventil selbst und die Stege sind der Spülflüssigkeitsströmung ausgesetzt, während sämtliche empfindlichen Einrichtungen wie Meßinstrumente, Wandler, Drosselventilantrieb und die Energieversorgung entweder im weniger stark beanspruchten Außenroht angeordnet sind oder in gegen die Spülflüssigkeit abgedichteten Räumen.The invention has the advantage that, in addition to the signals supplied by the inclinometers, a large number of further data of the target boring bar can also be transmitted to the outside. The required measuring devices and monitors can be accommodated in the standing and therefore relatively less mechanically stressed outer tube and only the signals they deliver after conversion into hydraulic and mechanical pulses for the throttle valve can be transferred to the flushing flow. The throttle valve according to the invention is arranged in the flushing flow channel so as to be displaceable in the axial direction, so that the flushing flow flows around it in a favorable manner in a ring. It therefore offers the abrasive forces in the flushing flow fewer opportunities for attack, which results in a longer service life. In addition, the flushing medium has no possibility of coming into contact with the drive and movement units of the valve. This prevents the valve assembly from becoming stuck due to deposits. Only the valve itself and the webs are exposed to the flushing liquid flow, while all sensitive devices such as measuring instruments, transducers, throttle valve drives and the energy supply are either arranged in the outer tube, which is less stressed, or in rooms sealed against the flushing liquid.

Vorteilhafterweise ist das Ventil anströmseitig als eine auf dem Hohlkörper in axialer Richtung verschiebbare stromlinienförmige Kappe und abströmseitig als im Hohlkörper in axialer Richtung verschiebbare stromlinienförmige Kappe ausgebildet. Hierdurch wird der abrasiven Strömung ein möglichst geringer Widerstand entgegengesetzt. Zur Betätigung des Drosselventils kann ein hydraulischer bzw. pneumatischer Antrieb vorgesehen sein, in dem der Ventilkörper durch Bohrungen im Innenrohr und in Stegen des Hohlkörpers über eine im Außenrohr angeordnete Druckmittelversorgung betätigbar ist, wobei das Ventil über zwei hermetisch gegeneinander abgedichtete Kammern verfügt, in die je eine der Bohrungen mündet. Wird die anströmseitige Kammer mit hydraulischem bzw. pneumatischem Druckmittel versorgt, so schiebt sich die Kappe gegen den Ventilsitz und verringert den Strömungsquerschnitt bzw. unterbindet die Strömung ganz. Die Kappe sitzt auf dem Außenumfang des Hohlkörpers.Advantageously, the valve is designed on the inflow side as a streamlined cap which can be displaced in the axial direction on the hollow body and on the outflow side as a streamlined cap which can be displaced in the axial direction in the hollow body. As a result, the abrasive flow is opposed to the lowest possible resistance. To operate the throttle valve, a hydraulic or pneumatic drive can be provided, in which the valve body can be actuated through bores in the inner tube and in webs of the hollow body via a pressure medium supply arranged in the outer tube, the valve having two hermetically sealed chambers, in each of which one of the holes opens. If the upstream chamber is supplied with hydraulic or pneumatic pressure medium, the cap pushes against the valve seat and reduces the flow cross-section or completely prevents the flow. The cap sits on the outer circumference of the hollow body.

Alternativ kann das Ventil durch Hebel betätigbar sein, die am Ventil angreifen und durch im Außenrohr angeordnete Antriebe angetrieben sind. Dabei können die Hebel als Gabelwippen ausgebildet sein, die durch die Stege einsetzbar und am Hohlkörper gelagert sind. Die durch den Antrieb betätigten Gabelwippen betätigen ihrerseits einen im Hohlkörper angeordneten Kolben, der die Kappen in oder entgegen der Strömungsrichtung verschiebt. Als Antrieb für die Hebel ist ein hydraulisch bzw. pneumatisch betreibbarer Ringkolben vorgesehen, der im Außenrohr gelagert ist. Dabei sind die antriebsseitigen Hebelenden an einem Rotationslager angeordnet, dessen feststehender Teil am Ringkolben befestigt ist. Die antriebsseitigen Hebelenden können jedoch auch elektromechanisch bzw. elektromagnetisch betätigt werden, darüberhinaus kann das Ventil jedoch auch direkt elektromagnetisch bzw. elektromechanisch angetrieben sein.Alternatively, the valve can be actuated by levers which engage the valve and are driven by drives arranged in the outer tube. The levers can be designed as fork rockers that can be inserted through the webs and are mounted on the hollow body. The fork rockers actuated by the drive in turn actuate a piston which is arranged in the hollow body and displaces the caps in or against the direction of flow. A hydraulically or pneumatically operable ring piston is provided as the drive for the levers and is mounted in the outer tube. The lever ends on the drive side are arranged on a rotary bearing, the fixed part of which is attached to the annular piston. However, the lever ends on the drive side can also be actuated electromechanically or electromagnetically, however, the valve can also be driven directly electromagnetically or electromechanically.

Ausführungsformen und weitere Vorteile der Erfindung sind im folgenden anhand von Zeichnungen dargestellt und näher erläutert. Es zeigen

  • Fig. 1 in abgebrochener Darstellung eine Zielbohrstange mit darin angeordnetem Drosselventil (Hebelbetätigung),
  • Fig. 2 Querschnitt des Drosselventils (druckmittelbetätigt),
  • Fig. 3 in abgebrochener Darstellung Querschnitt durch eine Zielbohrstange mit darin angeordnetem Drosselventil, Draufsicht des Ventils (druckmittelbetätigt),
  • Fig. 4 anströmseitige Ansicht des Innenrohres mit darin angeordnetem Drosselventil.
Embodiments and further advantages of the invention are shown below with reference to drawings and explained in more detail. Show it
  • 1 is a broken view of a target boring bar with throttle valve arranged therein (lever actuation),
  • 2 cross section of the throttle valve (actuated by pressure medium),
  • 3 shows a broken-away cross-section through a target boring bar with a throttle valve arranged therein, top view of the valve (actuated by pressure medium),
  • Fig. 4 upstream view of the inner tube with a throttle valve arranged therein.

In der Figur 1 ist in abgebrochener Darstellung eine Zielbohrstange allgemein mit dem Bezugszeichen 1 versehen. Sie besteht aus einem im Bohrloch feststehenden Außenrohr 2, welches auf seiner Außenseite mit schwenkbar an diesem gelagerten, nicht dargestellten Steuerleisten versehen ist, die sich an der Bohrlochwand abstützen und über hydraulisch beaufschlagbare Zylinder einzeln verstellt werden können, um die Richtung des Bohrgestänges zu korrigieren. Drehbar im Außenrohr 2 ist ein Innenrohr 3 gelagert. Drehfest mit dem Innenrohr 3 verbunden ist konzentrisch in diesem ein allgemein mit 4 bezeichnetes Drosselventil angeordnet. Das Drosselventil 4 besteht aus einem ringförmigen Grundkörper 5, in dem konzentrisch ein Hohlkörper 6 angebracht ist, der über Stege 7 und 8 mit dem Grundkörper 5 verbunden ist. Die Stege 7 und 8 sind innen hohl ausgebildet und fluchten mit Öffnungen 9 und 10 im Innenrohr 3. Die Öffnungen 9 und 10 münden in Kammern 11, die ringförmig um das Innenrohr 3 im Außenrohr 2 herumgeführt sind. Der Grundkörper 5 ist beidseitig offen, wobei eine Seite 12 verjüngt ausgebildet ist. Auch der Hohlkörper 6 ist beidseitig offen. Auf dem Außenumfang des Hohlkörpers 6 und zwar an seinem der verjüngten Seite 12 des Grundkörpers 5 zugewandten Ende ist eine stromlinienförmige Kappe 13 verschiebbar gelagert und mit Ringdichtungen 14 und 15 gegen den Hohlkörper abgedichtet. An seinem anderen Ende verfügt der Hohlkörper 6 über eine weitere Kappe 16, die jedoch in dem durch das Hohlkörperende gebildeten Zylinder als Kolben geführt und mit Ringdichtungen 17 und 18 gegen den Hohlkörper 6 abgedichtet ist. Die Kappen 13 und 16 sind mit einer Stange 19 verbunden. Dort, wo die Stange 19 den Stegbereich passiert, greifen die abtriebsseitigen Enden 20 und 21 von als Gabelwippen 22 und 23 ausgebildeten Hebeln an der Stange 19 an. Die Gabelwippen 22 und 23 sind am Grundkörper 5 drehbar gelagert. Die antriebbseitigen Enden 24 und 25 der Gabelwippen 22 und 23 sind an Zapfen 26 befestigt. Die Zapfen 26 sind an einem Ring 27 angeordnet, der um das Innenrohr 3 herumgeführt ist und drehbar an Rotationslagern 28 gelagert, die an einem Ringkolben 29 befestigt sind. Der Ringkolben 29 ist lediglich in axialer Richtung verschiebbar. Der Ringkolben 29 wird z.B. über Druckmittelkanäle 30 und 31 mit Druckmittel beaufschlagt. Mit Hilfe der Dichtungen 32, 33 und 34 sind der Ringkolben und die Druckmittelkanäle gegen das Außenrohr 2 abgedichtet. Wird der Ringkolben 29 im Ringraum 11 in eine Richtung verschoben, so verschieben die Gabelwippen 22 und 23 die Stange 19 in die entgegengesetzte Richtung. Die Stange 19, an der die Kappen 13 und 16 angeordnet sind, verschiebt somit die Kappen 13 und 16 entweder in Richtung auf die verjüngte Öffnung 12 des Grundkörpers 5, wobei im Extremfall die Kappe 13 auf den Rand der Öffnung 12 aufliegt. Die Öffnung 12 mündet im Spülflüssigkeitskanal 35, der Spülflüssigkeit vom nicht dargestellten Bohrlochmund zur ebenfalls nicht dargestellten Bohrkrone führt. Die Spülflüssigkeit strömt auf die Kappe 13 zu, an dieser, dem Hohlkörper 6 und der Kappe 16 vorbei, zur Bohrkrone. Nicht dargestellte Meßinstrumente im Außenrohr 2, die Meßwerte über den Zustand der Zielbohrstange und deren Richtung aufnehmen, geben diese an einen ebenfalls nicht dargestellten Wandler im Außenrohr 2 weiter, der die elektrischen Impulse in hydraulische Impulse umwandelt, die über die Kanäle 30 und 31 den Ringkol- - ben 29 betätigen. Die Betätigung des Ringkolbens - 29 führt zur Verschiebung der Kappen 13 und 16 und somit zu Querschnittsveränderungen des Spülflüssigkeitsquerschnitts. Hierdurch werden Druckpulse auf den Spülflüssigkeitsstrom übertragen, die durch geeignete Instrumente am Bohrlochmund aufgefangen und weiterverarbeitet werden. Zum Einbau der Gabelwippen und für Wartungsarbeiten ist der Ringraum 11 über Deckel 36 zugänglich.In FIG. 1, a target boring bar is generally provided with the reference symbol 1 in a broken representation. It consists of an outer tube 2 which is fixed in the borehole and which is provided on its outside with control bars, not shown, which are pivotally mounted thereon, which are supported on the borehole wall and can be individually adjusted via hydraulically actuatable cylinders in order to correct the direction of the drill pipe. An inner tube 3 is rotatably mounted in the outer tube 2. Connected in a rotationally fixed manner to the inner tube 3, a throttle valve, generally designated 4, is arranged concentrically therein. The throttle valve 4 consists of an annular base body 5, in which a hollow body 6 is concentrically attached, which is connected to the base body 5 via webs 7 and 8. The webs 7 and 8 are hollow on the inside and are aligned with openings 9 and 10 in the inner tube 3. The openings 9 and 10 open into chambers 11 which are guided in a ring around the inner tube 3 in the outer tube 2. The base body 5 is open on both sides, one side 12 being tapered. The hollow body 6 is also open on both sides. On the outer circumference of the hollow body 6, namely at its end facing the tapered side 12 of the base body 5, a streamlined cap 13 is slidably mounted and sealed with ring seals 14 and 15 against the hollow body. At its other end, the hollow body 6 has a further cap 16, which, however, is guided as a piston in the cylinder formed by the end of the hollow body and is sealed against the hollow body 6 with ring seals 17 and 18. The caps 13 and 16 are connected to a rod 19. Where the rod 19 passes the web area, the ends 20 and 21 on the driven side are engaged by levers designed as rocker arms 22 and 23 on the rod 19. The fork rockers 22 and 23 are rotatably mounted on the base body 5. The drive-side ends 24 and 25 of the fork rockers 22 and 23 are fastened to pins 26. The pins 26 are arranged on a ring 27 which is guided around the inner tube 3 and rotatably mounted on rotary bearings 28 which are fastened to an annular piston 29. The annular piston 29 can only be displaced in the axial direction. The annular piston 29 is e.g. pressurized with pressure medium channels 30 and 31. With the help of the seals 32, 33 and 34, the ring piston and the pressure medium channels are sealed against the outer tube 2. If the annular piston 29 is displaced in the annular space 11 in one direction, the fork rockers 22 and 23 move the rod 19 in the opposite direction. The rod 19, on which the caps 13 and 16 are arranged, thus displaces the caps 13 and 16 either in the direction of the tapered opening 12 of the base body 5, in the extreme case the cap 13 resting on the edge of the opening 12. The opening 12 opens into the flushing liquid channel 35, which leads the flushing liquid from the hole mouth, not shown, to the drill bit, also not shown. The rinsing liquid flows towards the cap 13, past it, the hollow body 6 and the cap 16, to the drill bit. Measuring instruments, not shown, in the outer tube 2, which take measured values about the state of the target boring bar and its direction, pass these on to a converter, also not shown, in the outer tube 2, which converts the electrical pulses into hydraulic pulses, which via the channels 30 and 31 the ring piston - - press ben 29. The actuation of the annular piston 29 leads to the displacement of the caps 13 and 16 and thus to changes in the cross section of the flushing liquid cross section. As a result, pressure pulses are transmitted to the flushing liquid stream, which are collected and processed by suitable instruments at the mouth of the borehole. The annular space 11 is accessible via the cover 36 for installing the fork rockers and for maintenance work.

In den Figuren 2 und 3 ist eine weitere Ausführungsform der erfindungsgemäßen Vorrichtung dargestellt, wobei gleiche Teile wie in Figur 1 mit denselben Bezugszeichen versehen sind. Im Unterschied zum Drosselventil gemäß Figur 1 werden die Kappen 13 und 16 hydraulisch bzw. pneumatisch betätigt. Ein Ringkolben entfällt daher, ebenso wie die Gabelwippen. Dafür sind in den Stegen Kanäle 40 und 41 sowie 42 und 43 vorgesehen, die mit Kanälen 44 bis 47 im Innenrohr 3 fluchten. Die Kanäle 40 bis 47 werden von einer, nicht dargestellten Druckmittelversorgung im Außenrohr 2 beaufschlagt. Die Kanäle 40 bis 43 münden in zwei voneinander getrennten Kammern 48 und 49 im Hohlkörper 6. Das Druckmittel strömt je nach gewünschter Verschieberichtung der Kappen 13 und 16 in die Kammern 48 oder 49 und drückt somit entweder die Kappe 13 zur Öffnung 12 oder die Kappe 16 zur entgegengesetzten Öffnung des Grundkörpers 5, wodurch sich die oben angesprochene Druckpulserzeugung im Flüssigkeitsstrom ergibt. Durch entsprechende Gestaltung, der Durchmesserverhältnisse von d1, d2 und d3 ergibt sich die Möglichkeit der hydrostatischen Druckkompensation.A further embodiment of the device according to the invention is shown in FIGS. 2 and 3, the same parts as in FIG. 1 being provided with the same reference symbols. In contrast to the throttle valve according to FIG. 1, the caps 13 and 16 are actuated hydraulically or pneumatically. An annular piston is therefore no longer required, as is the fork rocker. For this purpose, channels 40 and 41 and 42 and 43 are provided in the webs, which are aligned with channels 44 to 47 in the inner tube 3. The channels 40 to 47 are acted upon by a pressure medium supply, not shown, in the outer tube 2. The channels 40 to 43 open into two separate chambers 48 and 49 in the hollow body 6. Depending on the desired direction of displacement of the caps 13 and 16, the pressure medium flows into the chambers 48 or 49 and thus presses either the cap 13 to the opening 12 or the cap 16 to the opposite th opening of the base body 5, resulting in the above-mentioned pressure pulse generation in the liquid flow. Appropriate design, the diameter ratios of d1, d2 and d3 result in the possibility of hydrostatic pressure compensation.

Ist w1 = w2 = w3 = 0 so ist, abgesehen von der axialen Systemausdehnung (statisches Druckgefälle)

  • p1 = p2 = p3
  • und über
  • d12-d22 = d32
  • ist durch die äußere Strömung (w = 0)
  • v1 = v2 = 0.
If w1 = w2 = w3 = 0 then, apart from the axial system expansion (static pressure drop)
  • p1 = p2 = p3
  • and over
  • d1 2 -d2 2 = d3 2
  • is due to the external flow (w = 0)
  • v1 = v2 = 0.

Das heißt: Der Strömungswiderstandskörper (Kappen 13 und 16 und Hohlkörper 6) ist hydrostatisch druckkompensiert und erfährt keine Axialverschiebung durch die äußeren Druckkräfte.This means that the flow resistance body (caps 13 and 16 and hollow body 6) is hydrostatically pressure-compensated and does not experience any axial displacement due to the external pressure forces.

Ist w1 ≠ w2 * w3 dann ist über die Energiegleichung von Bernulli

  • p1≠ p2≠ p3.
  • D.h.: Das System arbeitet über
  • w3 < w2 < w1 und d12-d22 Ξ d32
If w1 ≠ w2 * w3 then it is about Bernulli's energy equation
  • p1 ≠ p2 ≠ p3.
  • Ie: The system works over
  • w3 <w2 <w1 and d1 2 -d2 2 Ξ d3 2

unter Berücksichtigung der Strömungsverluste aus Form, Oberfläche und Strömungszustandsänderung hydrodynamisch teildruckkompensiert und teilweise kraftkompensiert (axial).taking into account the flow losses from shape, surface and flow state change, hydrodynamically partial pressure compensated and partly force compensated (axial).

Claims (7)

1. Target drill string, especially for use underground, incorporating long distance transmission of information from a borehole during operation of a drilling device with the aid of the drilling fluid and measuring devices for the determination of the desired data, a convertor for converting the data signals into a series of coded signals, a movable regulating valve (13, 16) for controlling the flow cross- section for the drilling fluid by means of which the pressure of the drilling fluid in the drill string can be modulated, a drive controllable independently of the convertor signals for opening and closing the regulating valve (13, 16) and a measurement transducer arranged at the mouth of the borehole for measurement of the pressure of the drilling fluid and for converting the detected pressure pulse trains back to usable data signals, wherein the target drill string (1) in the region of the drill bit has an inner pipe (3) rotatable with the drill string and a concentrically outwardly located outer pipe (2), in which are arranged a control wheel housed in the target drill string (1) having a pressure generator whose movable part is formed by the inner pipe (3) or is driven by an elec- tromotor whose drive is derived from the inner pipe (3), and a drive provided for operation of the regulating valve (13, 16), which has a basic member (5) connected for rotation with the inner pipe (3), characterised in that the upstream end (12) of the basic member (5) is tapered and serves as a seat for the valve which is movable in the axial direction of the drill strings, the valve being guided in a hollow member (6) which is arranged concentrically within the basic member (5), is connected by lands (7, 8) with the basic member (5) and is open on both sides, and the valve being sealed against the hollow member (6), and that the valve (13, 16) is operable mechanically by levers (22, 23) for the drives (29) arranged in the outer pipe (2) or hydraulically with the aid of throughholes (40-43; 44-47) in the inner pipe (3) and in the lands (7, 8) of the hollow member (6) and a pressure supply arranged in the outer pipe (2), wherein there are provided in the valve (13, 16) two chambers (48, 49) which are hermetically sealed against each other and into which respective throughholes (40, 43) open.
2. Apparatus according to claim 1, characterised in that the valve (13, 16) has on the upstream side a streamlined cap (13) which is axially movable in the direction of the hollow member (6), and on the downstream side a streamlined cap (16) which is axially movable in the hollow member (6).
3. Apparatus according to claim 1 or 2, characterised in that the levers (22, 23) are formed as forked rockers which are adjustable by means of the lands (7, 8) and located on the hollow member (6).
4. Apparatus according to any one of claims 1 to 3, characterised in that the levers (22, 23) are operable by way of an hydraulically or pneumatically driven annular piston (29) in the outer pipe (2), wherein the driven side of the lever ends engages a rotation bearing (28) whose fixed part is fastened to the annular piston (29).
5. Apparatus according to any one of claims 1 to 3, characterised in that the driven side of the lever ends are operable electromechanically.
6. Apparatus according to any one of claims 1 to 3, characterised in that the driven side of the lever ends are operable electromagnetically.
7. Apparatus according to any one of claims 1 to 3, characterised in that the valve (13, 16) can be driven directly electromagnetically or electromechanically.
EP86111862A 1985-08-31 1986-08-27 Down-hole device for transmitting information from a well Expired EP0214554B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT86111862T ATE48179T1 (en) 1985-08-31 1986-08-27 DEVICE, PARTICULARLY FOR USE UNDERGROUND, FOR REMOTE TRANSMISSION OF INFORMATION FROM A BOREHOLE.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19853531226 DE3531226A1 (en) 1985-08-31 1985-08-31 DEVICE, IN PARTICULAR FOR UNDERGROUND APPLICATION FOR REMOTE TRANSMISSION OF INFORMATION FROM A DRILL HOLE
DE3531226 1985-08-31

Publications (3)

Publication Number Publication Date
EP0214554A2 EP0214554A2 (en) 1987-03-18
EP0214554A3 EP0214554A3 (en) 1987-07-29
EP0214554B1 true EP0214554B1 (en) 1989-11-23

Family

ID=6279890

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86111862A Expired EP0214554B1 (en) 1985-08-31 1986-08-27 Down-hole device for transmitting information from a well

Country Status (10)

Country Link
US (1) US4784229A (en)
EP (1) EP0214554B1 (en)
JP (1) JPS62117984A (en)
AT (1) ATE48179T1 (en)
AU (3) AU6212286A (en)
BR (1) BR8604152A (en)
CA (1) CA1261816A (en)
DE (2) DE3531226A1 (en)
SU (1) SU1642958A3 (en)
ZA (1) ZA866610B (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3531226A1 (en) * 1985-08-31 1987-03-19 Schwing Hydraulik Elektronik DEVICE, IN PARTICULAR FOR UNDERGROUND APPLICATION FOR REMOTE TRANSMISSION OF INFORMATION FROM A DRILL HOLE
US5957221A (en) * 1996-02-28 1999-09-28 Baker Hughes Incorporated Downhole core sampling and testing apparatus
DE19607402C1 (en) * 1996-02-28 1997-07-10 Welldone Engineering Gmbh Device for transmitting information within a drill pipe string of a drilling device by means of pressure pulses in a flowing liquid, in particular drilling fluid
CN105573248B (en) * 2016-01-13 2018-01-30 南京航空航天大学 Sheet metal assembly dimensional discrepancy control method based on the compensation of multistation assembling jig

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3255353A (en) * 1962-12-21 1966-06-07 Serge A Scherbatskoy Apparatus for nuclear well logging while drilling
FR2117726B1 (en) * 1970-12-10 1973-12-07 Aquitaine Petrole
US4044834A (en) * 1975-04-09 1977-08-30 Perkins Lee E Apparatus and method for controlling the flow of fluids from a well bore
DE2941102A1 (en) * 1979-10-08 1981-04-16 Dresser Industries, Inc., 75221 Dallas, Tex. Measuring and transmitting apparatus used in drill string - is self-contained and forms output signals modulated into mud flow
DE3000239C2 (en) * 1980-01-05 1983-10-20 Bergwerksverband Gmbh, 4300 Essen Facility for producing targeted holes
DE3046122C2 (en) * 1980-12-06 1984-05-17 Bergwerksverband Gmbh, 4300 Essen Equipment for making targeted bores with a target boring bar
DE3028813C2 (en) * 1980-07-30 1983-09-08 Christensen, Inc., 84115 Salt Lake City, Utah Method and device for the remote transmission of information
US4470430A (en) * 1981-05-26 1984-09-11 Lancaster Robert D Drilling choke
NL8302429A (en) * 1982-07-10 1984-02-01 Sperry Sun Inc DEVICE FOR PROCESSING SIGNALS IN A DRILLING HOLE DURING DRILLING.
DE3233982C1 (en) * 1982-09-14 1983-10-27 Christensen, Inc., 84115 Salt Lake City, Utah Auxiliary controlled valve located in a drill string
DE3325962A1 (en) * 1983-07-19 1985-01-31 Bergwerksverband Gmbh, 4300 Essen TARGET DRILL ROD FOR ROTATING DRILL ROD WITH RINSING CHANNEL FOR UNDERGROUND OPERATION
DE3531226A1 (en) * 1985-08-31 1987-03-19 Schwing Hydraulik Elektronik DEVICE, IN PARTICULAR FOR UNDERGROUND APPLICATION FOR REMOTE TRANSMISSION OF INFORMATION FROM A DRILL HOLE

Also Published As

Publication number Publication date
DE3667093D1 (en) 1989-12-28
DE3531226C2 (en) 1987-09-24
AU4123393A (en) 1993-08-19
JPS62117984A (en) 1987-05-29
SU1642958A3 (en) 1991-04-15
AU6212286A (en) 1987-03-05
CA1261816A (en) 1989-09-26
DE3531226A1 (en) 1987-03-19
ZA866610B (en) 1987-05-27
AU5912590A (en) 1990-11-01
US4784229A (en) 1988-11-15
BR8604152A (en) 1987-04-28
EP0214554A2 (en) 1987-03-18
AU651764B2 (en) 1994-07-28
ATE48179T1 (en) 1989-12-15
EP0214554A3 (en) 1987-07-29

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