EP1956183B1 - Chuck head for a rod element - Google Patents

Chuck head for a rod element Download PDF

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Publication number
EP1956183B1
EP1956183B1 EP07400003A EP07400003A EP1956183B1 EP 1956183 B1 EP1956183 B1 EP 1956183B1 EP 07400003 A EP07400003 A EP 07400003A EP 07400003 A EP07400003 A EP 07400003A EP 1956183 B1 EP1956183 B1 EP 1956183B1
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EP
European Patent Office
Prior art keywords
rod
chuck head
clamping
lifting
drive
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.)
Not-in-force
Application number
EP07400003A
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German (de)
French (fr)
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EP1956183A1 (en
Inventor
Georg Hofner
Leonhard Weixler
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.)
Bauer Maschinen GmbH
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Bauer Maschinen GmbH
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 Bauer Maschinen GmbH filed Critical Bauer Maschinen GmbH
Priority to AT07400003T priority Critical patent/ATE438019T1/en
Priority to ES07400003T priority patent/ES2328979T3/en
Priority to DE502007001181T priority patent/DE502007001181D1/en
Priority to EP07400003A priority patent/EP1956183B1/en
Publication of EP1956183A1 publication Critical patent/EP1956183A1/en
Application granted granted Critical
Publication of EP1956183B1 publication Critical patent/EP1956183B1/en
Not-in-force 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
    • E21B19/00—Handling rods, casings, tubes or the like outside the borehole, e.g. in the derrick; Apparatus for feeding the rods or cables
    • E21B19/02—Rod or cable suspensions
    • E21B19/06—Elevators, i.e. rod- or tube-gripping devices
    • E21B19/07—Slip-type elevators
    • 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
    • E21B19/00—Handling rods, casings, tubes or the like outside the borehole, e.g. in the derrick; Apparatus for feeding the rods or cables
    • E21B19/16—Connecting or disconnecting pipe couplings or joints

Definitions

  • the invention relates to a clamping head for a linkage element with clamping elements for clamping the linkage element radially to the rod axis, a lifting device for generating an axial lifting movement and a Keilschiebermechanismus by which the axial lifting movement can be converted into a radial movement and for tensioning the linkage element to the clamping elements ,
  • Generic clamping heads are for example from the EP 0 525 247 A1 , of the DE 40 15 300 C1 or the US 5,992,801 known. These devices, which are used in particular for gripping drill pipe elements, have a conical surface as a wedge slide mechanism. Along the conical surface clamping blocks are guided as clamping elements displaced. In order to ensure a linear movement on these inclined conical surfaces, guide rails or guide grooves are generally provided.
  • Another chuck is from the EP 0 874 129 A known.
  • the clamping elements are also guided along a cone surface.
  • the lifting movement for adjusting the clamping elements is effected by the insertion of the linkage element.
  • the invention has for its object to provide a clamping head for a linkage element, which has a particularly robust and simple structure.
  • the clamping head according to the invention is characterized in that the wedge slide mechanism is formed by at least two actuating rods, which are slidably mounted in a base body in oblique to the rod axis guide bores, and that the actuating rods are connected at one end to the lifting device and at one end in each case directly a clamping element is arranged.
  • a first aspect of the invention can be seen in that the production of large conical surfaces is avoided.
  • the wedge arrangement for the wedge slide mechanism is effected by simple obliquely directed holes, in which simple, preferably cylindrical actuating rods are guided. This is easy and inexpensive to produce. Due to the oblique, preferably acute angle directed to the rod axis arrangement of the actuating rods they are also adjusted radially in an axial stroke movement.
  • Another aspect of the invention is not to store the actual clamping elements directly on the housing.
  • the clamping elements, which contact and hold the linkage element are arranged directly on the actuating rods, so that the clamping forces are transmitted to the main body or the housing via the actuating rods and the surrounding guide holes.
  • the actuating rods and the guide holes can be formed independently of the clamping elements in almost any dimensioning, so that a good force distribution and thus low surface pressures can be achieved. This protects the overall construction and reduces the effort required to release the clamping connections.
  • the lifting device has a sliding member, which is mounted axially displaceably on the base body.
  • the sliding member transmits an axial movement of the lifting device on the actuating rods. Since the actuating rods are mounted in the base body, a reliable transmission of the axial movement is ensured by the slide member also mounted on the base body. This allows the further lifting device, in particular a lifting cylinder, to be arranged separately from the main body.
  • the actuating rod is held axially fixed and radially displaceable on the sliding member.
  • In the radial direction may be provided about a T-slot guide or a dovetail guide, which allows a radial movement relative between the sliding member and the actuating rod.
  • the lifting device comprises a lifting plate, with which the sliding member is rotatably connected via a rotary bearing.
  • the pivot bearing which may be in particular an axial and radial bearing, makes it possible to use the clamping head for clamping rotating drill pipe without the lifting device with the clamping elements must be set in rotation. In such a case, the main body and the slide member would rotate with a linkage element, while the lifting plate can stand relative thereto due to the pivot bearing.
  • the lifting device can be designed in any desired way to effect an axial movement.
  • Conceivable is a cable drive, a spindle drive or a rack and pinion drive. It is provided according to the invention that the lifting device has at least one actuating cylinder.
  • the adjusting cylinder may in particular be a hydraulic cylinder, as this can reliably transmit high axial forces in a compact manner.
  • the lifting device can be designed so that it generates an axial forward and backward movement via a drive member.
  • a particularly simple embodiment according to the invention is that the lifting device has a spring mechanism for an axial return movement.
  • the drive member may be a single-acting actuator cylinder.
  • the clamping head according to the invention can only be used for clamping and holding rod elements, as is necessary, for example, for simple holding devices or hoists.
  • the clamping head can also be used as a drive unit, is provided in accordance with the invention that a drive connection with a rod connection device, in particular a thread, is provided and that the drive connection is driven in rotation.
  • the clamping head can be designed in particular so that a drill string element is initially held on the clamping elements, while a corresponding connection element of the drive unit or other linkage element is rotated relative thereto via a strut, so that a linkage connection is made.
  • such a device according to the invention can be used for driving drill pipes from individual drill string elements.
  • the drive connection is mounted axially fixed relative to the main body.
  • the drive connection can be arranged rotatable or non-rotatable relative to the main body.
  • the invention further relates to a drill with a drill drive for rotationally driving a drill pipe, which is composed of individual linkage elements, which is characterized according to the invention in that a previously described clamping head is provided.
  • a drill is created with which a simple and reliable tension of linkage elements is possible.
  • the drive connection of the clamping head forms the output of the drill drive.
  • the drill drive thus represents a part of the clamping head according to the invention, so that they can be formed as a unit.
  • FIGURE shows a schematic cross-sectional view, wherein the right side represents a clamping position and the left side represents a release position of the clamping head according to the invention.
  • an inventive clamping head 10 comprises a sleeve-shaped base body 14, on the outside of which a shoulder 15 is provided for broadening.
  • a shoulder 15 is provided for broadening.
  • cylindrical guide holes 54 are arranged distributed uniformly over the circumference.
  • two guide holes 54 are shown, but it can also be more, four, six, eight, etc. guide holes 54 may be provided.
  • the guide bores 54 are arranged at an acute angle to a rod axis 6, which coincides with an axis of rotation of the clamping head 10.
  • an actuating rod 52 are slidably mounted, at the lower end in each case a clamping element 12 is fixed for contacting a rod member to be held 5.
  • a radial guide 34 which is a dovetail design in the present embodiment, axially fixed to an annular slide member 32, but held radially displaceable.
  • the sliding member 32 is mounted axially displaceably on a cylindrical guide surface 19 of the base body 14.
  • the sliding member 32 is in turn axially fixed via a pivot bearing 38, but rotatably supported on an annular lifting plate 36 of a lifting device 30.
  • piston 39 At the top of the lifting plate 36 schematically indicated piston 39 are hinged by adjusting cylinders, which cause a stroke H of the lifting plate 36 in the axial direction.
  • a drive connection 16 is rotatably mounted on the inside of the main body 14.
  • the drive connection 16 has a thread at its lower end.
  • an inner tube 17 is rotatably fixed, which is provided for a fluid passage.
  • the rotary drive and the fluid supply, to which the drive port 16 and the inner tube 17 are connected, are omitted for reasons of clarity.
  • a lubricating device 20 with lubrication channels a multi-tooth connection 21, provided on the base body 14 and the drive port 16 with lubricant.
  • the release position of the clamping head 10 is in the left side of Fig. 1 shown.
  • the lifting plate 36 is moved upwards. Accordingly, the slide member 32 and the actuating rods 52 are in their upper position.
  • After insertion of an upper end of the linkage element 5 with a rod thread 7 in the inner space of the tubular body 14 is lowered for clamping the lifting plate 36 via the piston 39. Accordingly, the slide member 32 and the actuating rods 52 held thereon are displaced downward.
  • the actuating rods 52 are also moved radially in the direction of the linkage axis 6 until the hardened clamping elements 12 firmly abut the outside of the linkage element 5 and this rotatably with the Connect body 14.
  • the wedge slide mechanism 50 allows easy manufacturability, since normal cylindrical bores and simple cylinder rods can be used, wherein the wedge effect is achieved only by an oblique arrangement of the guide bores 54.
  • the actuating rods 52 can be made relatively long, so that even with large clamping forces relatively low surface pressures between the actuating rods 52 and the base 14 result. As a result, jamming of the clamping head 10 is counteracted and reduces the force required to release the clamping position.

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  • Engineering & Computer Science (AREA)
  • Geology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Mining & Mineral Resources (AREA)
  • Physics & Mathematics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Earth Drilling (AREA)
  • Adjustment Of The Magnetic Head Position Track Following On Tapes (AREA)
  • Magnetic Heads (AREA)
  • Wire Bonding (AREA)

Abstract

The clamping head (10) has a clamping element (12) to clamp the rod element (5) radially to rod axle (6). A lifting unit (30) produces an axial lifting movement and a wedge-shape sliding mechanism (50) is formed by actuating rod (52). The actuating rod is supported movable diagonally to rod axis that id equipped with a guide bore (54). The actuating rod is connected at an end with the lifting unit and the other end has a clamping unit. An independent claim is also included for a drilling device with drilling drive.

Description

Die Erfindung betrifft einen Spannkopf für ein Gestängeelement mit Spannelementen zum Spannen des Gestängeelementes radial zu dessen Gestängeachse, einer Hubeinrichtung zum Erzeugen einer axialen Hubbewegung und einen Keilschiebermechanismus, durch welchen die axiale Hubbewegung in eine radiale Bewegung umsetzbar und zum Spannen des Gestängeelementes auf die Spannelemente übertragbar ist.The invention relates to a clamping head for a linkage element with clamping elements for clamping the linkage element radially to the rod axis, a lifting device for generating an axial lifting movement and a Keilschiebermechanismus by which the axial lifting movement can be converted into a radial movement and for tensioning the linkage element to the clamping elements ,

Gattungsgemäße Spannköpfe sind beispielsweise aus der EP 0 525 247 A1 , der DE 40 15 300 C1 oder der US 5,992,801 bekannt. Diese Vorrichtungen, welche insbesondere zum Greifen von Bohrgestängeelementen eingesetzt werden, weisen als einen Keilschiebermechanismus eine Konusfläche auf. Entlang der Konusfläche sind Klemmsteine als Spannelemente verschiebbar geführt. Um auf diesen schrägen Konusflächen eine lineare Bewegung sicherzustellen, sind in der Regel Führungsleisten oder Führungsnuten vorgesehen.Generic clamping heads are for example from the EP 0 525 247 A1 , of the DE 40 15 300 C1 or the US 5,992,801 known. These devices, which are used in particular for gripping drill pipe elements, have a conical surface as a wedge slide mechanism. Along the conical surface clamping blocks are guided as clamping elements displaced. In order to ensure a linear movement on these inclined conical surfaces, guide rails or guide grooves are generally provided.

Derartige schräge Konusflächen mit Führungsleisten oder Führungsnuten sind aufwändig in der Fertigung. Bei den auf den Konusflächen geführten Klemmsteinen können relativ hohe Flächenpressungen beim Spannen auftreten, welche zu Verformungen und Verklemmungen führen können. Zudem haben hohe Flächeripressungen entsprechend hohe Haftkräfte zur Folge, wodurch entsprechend große Kräfte zum Lösen der Spannung aufgebracht werden müssen.Such oblique conical surfaces with guide rails or guide grooves are expensive to manufacture. In the case of the clamping blocks guided on the conical surfaces, relatively high surface pressures can occur during clamping, which can lead to deformations and jamming. In addition, high Flankeipressungen correspondingly high adhesive forces result, whereby correspondingly large forces must be applied to release the voltage.

Ein weiterer Spannkopf ist aus der EP 0 874 129 A bekannt. Die Spannelemente sind ebenfalls entlang einer Konusfläche geführt. Die Hubbewegung zum Verstellen der Spannelemente wird durch das Einschieben des Gestängeelementes bewirkt.Another chuck is from the EP 0 874 129 A known. The clamping elements are also guided along a cone surface. The lifting movement for adjusting the clamping elements is effected by the insertion of the linkage element.

Der Erfindung liegt die Aufgabe zugrunde, einen Spannkopf für ein Gestängeelement anzugeben, welcher einen besonders robusten und einfachen Aufbau aufweist.The invention has for its object to provide a clamping head for a linkage element, which has a particularly robust and simple structure.

Die Aufgabe wird nach der Erfindung durch einen Spannkopf mit den Merkmalen des Anspruchs 1 gelöst. Bevorzugte Ausführungsformen sind in den abhängigen Ansprüchen angegeben.The object is achieved according to the invention by a clamping head with the features of claim 1. Preferred embodiments are given in the dependent claims.

Der erfindungsgemäße Spannkopf ist dadurch gekennzeichnet, dass der Keilschiebermechanismus durch mindestens zwei Betätigungsstangen gebildet ist, welche in einem Grundkörper in schräg zur Gestängeachse gerichteten Führungsbohrungen verschiebbar gelagert sind, und dass die Betätigungsstangen an einem Ende mit der Hubeinrichtung verbunden sind und an einem anderen Ende jeweils unmittelbar ein Spannelement angeordnet ist.The clamping head according to the invention is characterized in that the wedge slide mechanism is formed by at least two actuating rods, which are slidably mounted in a base body in oblique to the rod axis guide bores, and that the actuating rods are connected at one end to the lifting device and at one end in each case directly a clamping element is arranged.

Ein erster Aspekt der Erfindung kann darin gesehen werden, dass die Herstellung großer Konusflächen vermieden ist. Gemäß der Erfindung wird die Keilanordnung für den Keilschiebermechanismus durch einfache schräg gerichtete Bohrungen bewirkt, in welchen einfache, vorzugsweise zylindrische Betätigungsstangen geführt sind. Dies ist einfach und kostengünstig herstellbar. Durch die schräge, vorzugsweise spitzwinklig zur Gestängeachse gerichtete Anordnung der Betätigungsstangen werden diese bei einer axialen Hubbewegung auch radial verstellt.A first aspect of the invention can be seen in that the production of large conical surfaces is avoided. According to the invention, the wedge arrangement for the wedge slide mechanism is effected by simple obliquely directed holes, in which simple, preferably cylindrical actuating rods are guided. This is easy and inexpensive to produce. Due to the oblique, preferably acute angle directed to the rod axis arrangement of the actuating rods they are also adjusted radially in an axial stroke movement.

Ein weiterer Aspekt der Erfindung besteht darin, die eigentlichen Spannelemente nicht unmittelbar am Gehäuse zu lagern. Die Spannelemente, welche das Gestängeelement kontaktieren und halten sind an den Betätigungsstangen unmittelbar angeordnet, so dass die Spannkräfte auf den Grundkörper oder das Gehäuse über die Betätigungsstangen und die umgebenden Führungsbohrungen übertragen werden. Die Betätigungsstangen und die Führungsbohrungen können jedoch unabhängig von den Spannelementen in einer nahezu beliebigen Dimensionierung ausgebildet werden, so dass eine gute Kraftverteilung und somit geringe Flächenpressungen erreichbar sind. Dies schont die Gesamtkonstruktion und reduziert den Kraftaufwand zum Lösen der Spannverbindungen.Another aspect of the invention is not to store the actual clamping elements directly on the housing. The clamping elements, which contact and hold the linkage element are arranged directly on the actuating rods, so that the clamping forces are transmitted to the main body or the housing via the actuating rods and the surrounding guide holes. However, the actuating rods and the guide holes can be formed independently of the clamping elements in almost any dimensioning, so that a good force distribution and thus low surface pressures can be achieved. This protects the overall construction and reduces the effort required to release the clamping connections.

Es ist erfindungsgemäß, dass die Hubeinrichtung ein Schiebeglied aufweist, welches axial verschiebbar an dem Grundkörper gelagert ist. Das Schiebeglied überträgt eine Axialbewegung der Hubeinrichtung auf die Betätigungsstangen. Da die Betätigungsstangen im Grundkörper gelagert sind, wird durch das ebenfalls am Grundkörper gelagerte Schiebeglied eine zuverlässige Übertragung der Axialbewegung sichergestellt. Dies erlaubt, die weitere Hubeinrichtung, insbesondere einen Hubzylinder, getrennt vom Grundkörper anzuordnen.It is according to the invention that the lifting device has a sliding member, which is mounted axially displaceably on the base body. The sliding member transmits an axial movement of the lifting device on the actuating rods. Since the actuating rods are mounted in the base body, a reliable transmission of the axial movement is ensured by the slide member also mounted on the base body. This allows the further lifting device, in particular a lifting cylinder, to be arranged separately from the main body.

Zur Vermeidung von Querkräften auf die Hubeinrichtung ist es erfindungsgemäß, dass die Betätigungsstange an dem Schiebeglied axial fest und radial verschiebbar gehalten ist. In radialer Richtung kann etwa eine T-Nutführung oder eine Schwalbenschwanzführung vorgesehen sein, welche eine Radialbewegung relativ zwischen dem Schiebeglied und der Betätigungsstange erlaubt. Somit können radial gerichtete Querkräfte, welche aufgrund der Schrägstellung der Betätigungsstange im Rahmen der Keilschieberanordnung entstehen, nicht auf das Schiebeglied und damit auf die Hubeinrichtung übertragen werden.To avoid lateral forces on the lifting device, it is according to the invention that the actuating rod is held axially fixed and radially displaceable on the sliding member. In the radial direction may be provided about a T-slot guide or a dovetail guide, which allows a radial movement relative between the sliding member and the actuating rod. Thus, radially directed transverse forces, which arise due to the inclination of the actuating rod in the context of the wedge slide assembly can not be transferred to the sliding member and thus to the lifting device.

Weiter ist es nach der Erfindung vorteilhaft, dass die Hubeinrichtung eine Hubplatte aufweist, mit welcher das Schiebeglied über ein Drehlager drehbar verbunden ist. Das Drehlager, welches insbesondere ein Axial- und Radiallager sein kann, ermöglicht es, den Spannkopf zum Spannen rotierender Bohrgestänge einzusetzen, ohne dass die Hubeinrichtung mit den Spannelementen mit in Rotation versetzt werden muss. In einem solchen Fall würden sich der Grundkörper und das Schiebeglied mit einem Gestängeelement drehen, während die Hubplatte aufgrund des Drehlagers relativ hierzu stillstehen kann.Further, it is advantageous according to the invention that the lifting device comprises a lifting plate, with which the sliding member is rotatably connected via a rotary bearing. The pivot bearing, which may be in particular an axial and radial bearing, makes it possible to use the clamping head for clamping rotating drill pipe without the lifting device with the clamping elements must be set in rotation. In such a case, the main body and the slide member would rotate with a linkage element, while the lifting plate can stand relative thereto due to the pivot bearing.

Grundsätzlich kann die Hubeinrichtung in beliebiger Weise ausgebildet sein, um eine Axialbewegung zu bewirken. Denkbar ist ein Seilantrieb, ein Spindelantrieb oder ein Zahnstangenantrieb. Es ist nach der Erfindung vorgesehen, dass die Hubeinrichtung mindestens einen Stellzylinder aufweist. Der Stellzylinder kann insbesondere ein Hydraulikzylinder sein, da hierdurch in kompakter Weise zuverlässig hohe Axialkräfte übertragen werden können.In principle, the lifting device can be designed in any desired way to effect an axial movement. Conceivable is a cable drive, a spindle drive or a rack and pinion drive. It is provided according to the invention that the lifting device has at least one actuating cylinder. The adjusting cylinder may in particular be a hydraulic cylinder, as this can reliably transmit high axial forces in a compact manner.

Grundsätzlich kann die Hubeinrichtung so ausgebildet sein, dass diese über ein Antriebsorgan eine axiale Vor- und Rückbewegung erzeugt. Eine besonders einfache Ausgestaltung besteht erfindungsgemäß darin, dass die Hubeinrichtung einen Federmechanismus für eine axiale Rückstellbewegung aufweist. Das Antriebsorgan kann dabei ein einfach wirkender Stellzylinder sein.In principle, the lifting device can be designed so that it generates an axial forward and backward movement via a drive member. A particularly simple embodiment according to the invention is that the lifting device has a spring mechanism for an axial return movement. The drive member may be a single-acting actuator cylinder.

Der erfindungsgemäße Spannkopf kann lediglich zum Spannen und Halten von Gestängeelementen eingesetzt werden, wie es beispielsweise für einfache Haltevorrichtungen oder Hebezeuge notwendig ist. Der Spannkopf kann jedoch auch als eine Antriebseinheit eingesetzt werden, bei der erfindungsgemäß vorgesehen ist, dass ein Antriebsstutzen mit einer Gestängeverbindungseinrichtung, insbesondere einem Gewinde, vorgesehen ist und dass der Antriebsstutzen rotierend antreibbar ist. Der Spannkopf kann dabei insbesondere so ausgelegt sein, dass über die Spannelemente ein Bohrgestängeelement zunächst gehalten wird, während über einen Abtriebsstutzen ein entsprechendes Anschlusselement der Antriebseinheit oder eines anderen Gestängeelementes relativ dazu gedreht wird, so dass eine Gestängeverbindung hergestellt wird. Insbesondere kann eine derartige erfindungsgemäße Vorrichtung zum Antreiben von Bohrgestängen aus einzelnen Bohrgestängeelementen eingesetzt werden.The clamping head according to the invention can only be used for clamping and holding rod elements, as is necessary, for example, for simple holding devices or hoists. However, the clamping head can also be used as a drive unit, is provided in accordance with the invention that a drive connection with a rod connection device, in particular a thread, is provided and that the drive connection is driven in rotation. The clamping head can be designed in particular so that a drill string element is initially held on the clamping elements, while a corresponding connection element of the drive unit or other linkage element is rotated relative thereto via a strut, so that a linkage connection is made. In particular, such a device according to the invention can be used for driving drill pipes from individual drill string elements.

Weiter ist es erfindungsgemäß, dass der Antriebsstutzen axial fest gegenüber dem Grundkörper gelagert ist. Abhängig vom Einsatzzweck kann der Antriebsstutzen gegenüber dem Grundkörper drehbar oder drehfest angeordnet sein. Hierdurch wird eine kompakte Konstruktion erreicht.It is also according to the invention that the drive connection is mounted axially fixed relative to the main body. Depending on the purpose of the drive connection can be arranged rotatable or non-rotatable relative to the main body. As a result, a compact construction is achieved.

Die Erfindung betrifft weiterhin ein Bohrgerät mit einem Bohrantrieb zum drehenden Antreiben eines Bohrgestänges, welches aus einzelnen Gestängeelementen zusammengesetzt ist, welches nach der Erfindung dadurch gekennzeichnet ist, dass ein vorausgehend beschriebener Spannkopf vorgesehen ist. Hierdurch wird ein Bohrgerät geschaffen, mit welchem eine einfache und zuverlässige Spannung von Gestängeelementen möglich ist.The invention further relates to a drill with a drill drive for rotationally driving a drill pipe, which is composed of individual linkage elements, which is characterized according to the invention in that a previously described clamping head is provided. As a result, a drill is created with which a simple and reliable tension of linkage elements is possible.

Dabei ist es erfindungsgemäß, dass der Antriebsstutzen des Spannkopfes den Abtrieb des Bohrantriebes bildet. Der Bohrantrieb stellt dabei somit einen Teil des erfindungsgemäßen Spannkopfes dar, so dass diese als eine Einheit ausgebildet werden können.It is according to the invention that the drive connection of the clamping head forms the output of the drill drive. The drill drive thus represents a part of the clamping head according to the invention, so that they can be formed as a unit.

Die Erfindung wird nachfolgend anhand eines bevorzugten Ausführungsbeispieles weiter beschreiben, welches schematisch in der Zeichnung dargestellt ist. Die einzige Figur zeigt eine schematische Querschnittsansicht, wobei die rechte Seite eine Spannposition und die linke Seite eine Freigabeposition des erfindungsgemäßen Spannkopfes darstellt.The invention will be further described with reference to a preferred embodiment, which is shown schematically in the drawing. The single FIGURE shows a schematic cross-sectional view, wherein the right side represents a clamping position and the left side represents a release position of the clamping head according to the invention.

Gemäß Fig. 1 umfasst ein erfindungsgemäßer Spannkopf 10 einen hülsenförmigen Grundkörper 14, an deren Außenseite eine Schulter 15 zur Verbreiterung vorgesehen ist. Im Bereich der schrägen Schulter 15 sind zylindrische Führungsbohrungen 54 gleichmäßig über den Umfang verteilt angeordnet. Im schematischen Ausführungsbeispiel sind zwei Führungsbohrungen 54 dargestellt, es können jedoch auch weitere, insgesamt vier, sechs, acht etc. Führungsbohrungen 54 vorgesehen sein. Die Führungsbohrungen 54 sind in einem spitzen Winkel zu einer Gestängeachse 6 angeordnet, welche mit einer Rotationsachse des Spannkopfes 10 zusammenfällt.According to Fig. 1 an inventive clamping head 10 comprises a sleeve-shaped base body 14, on the outside of which a shoulder 15 is provided for broadening. In the region of the oblique shoulder 15 cylindrical guide holes 54 are arranged distributed uniformly over the circumference. In the schematic embodiment, two guide holes 54 are shown, but it can also be more, four, six, eight, etc. guide holes 54 may be provided. The guide bores 54 are arranged at an acute angle to a rod axis 6, which coincides with an axis of rotation of the clamping head 10.

In den Führungsbohrungen 54 sind jeweils eine Betätigungsstange 52 verschiebbar gelagert, an deren unterem Ende jeweils ein Spannelement 12 zum Kontaktieren eines zu haltenden Gestängeelementes 5 befestigt ist. Am oberen Ende sind die Betätigungsstangen 52 über eine Radialführung 34, welche im vorliegenden Ausführungsbeispiel eine Schwalbenschwanzausführung ist, an einem ringförmigen Schiebeglied 32 axial fest, jedoch radial verschiebbar gehalten. Das Schiebeglied 32 ist auf einerzylindrischen Führungsfläche 19 des Grundkörpers 14 axial verschiebbar gelagert.In the guide holes 54, an actuating rod 52 are slidably mounted, at the lower end in each case a clamping element 12 is fixed for contacting a rod member to be held 5. At the upper end of the actuating rods 52 via a radial guide 34, which is a dovetail design in the present embodiment, axially fixed to an annular slide member 32, but held radially displaceable. The sliding member 32 is mounted axially displaceably on a cylindrical guide surface 19 of the base body 14.

Das Schiebeglied 32 ist wiederum über ein Drehlager 38 axial fest, jedoch drehbar an einer ringförmigen Hubplatte 36 einer Hubeinrichtung 30 gehalten. An der Oberseite der Hubplatte 36 sind schematisch angedeutete Kolben 39 von Stellzylindern angelenkt, welche einen Hub H der Hubplatte 36 in axialer Richtung bewirken.The sliding member 32 is in turn axially fixed via a pivot bearing 38, but rotatably supported on an annular lifting plate 36 of a lifting device 30. At the top of the lifting plate 36 schematically indicated piston 39 are hinged by adjusting cylinders, which cause a stroke H of the lifting plate 36 in the axial direction.

An der Innenseite des Grundkörpers 14 ist ein Antriebsstutzen 16 drehbar gelagert. Der Antriebsstutzen 16 weist an seinem unteren Ende ein Gewinde auf. An seiner Innenseite ist drehfest ein Innenrohr 17 befestigt, welches für eine Fluiddurchleitung vorgesehen ist. Der Rotationsantrieb sowie die Fluidzuführung, an welche der Antriebsstutzen 16 bzw. das Innenrohr 17 angeschlossen sind, sind aus Übersichtlichkeitsgründen weggelassen. Über eine Schmiereinrichtung 20 mit Schmierkanälen wird eine Vielzahnverbindung 21, am Grundkörper 14 und dem Antriebsstutzen 16 mit Schmiermittel versehen.On the inside of the main body 14, a drive connection 16 is rotatably mounted. The drive connection 16 has a thread at its lower end. On its inside, an inner tube 17 is rotatably fixed, which is provided for a fluid passage. The rotary drive and the fluid supply, to which the drive port 16 and the inner tube 17 are connected, are omitted for reasons of clarity. About a lubricating device 20 with lubrication channels a multi-tooth connection 21, provided on the base body 14 and the drive port 16 with lubricant.

Die Freigabeposition des Spannkopfes 10 ist in der linken Seite der Fig. 1 dargestellt. Die Hubplatte 36 ist nach oben verfahren. Entsprechend sind das Schiebeglied 32 und die Betätigungsstangen 52 in ihrer oberen Position. Nach Einführen eines oberen Endes des Gestängeelementes 5 mit einem Gestängegewinde 7 in den inneren Freiraum des rohrförmigen Grundkörpers 14 wird zum Spannen die Hubplatte 36 über die Kolben 39 abgesenkt. Entsprechend werden das Schiebeglied 32 und die daran gehaltenen Betätigungsstangen 52 nach unten verschoben. Aufgrund der schrägen Anordnung der Führungsbohrungen 54 und der Betätigungsstangen 52, welche einen Keilschiebermechanismus 50 bilden, werden die Betätigungsstangen 52 auch radial in Richtung auf die Gestängeachse 6 verschoben, bis die gehärteten Spannelemente 12 fest an der Außenseite des Gestängeelementes 5 anliegen und dieses drehfest mit dem Grundkörper 14 verbinden.The release position of the clamping head 10 is in the left side of Fig. 1 shown. The lifting plate 36 is moved upwards. Accordingly, the slide member 32 and the actuating rods 52 are in their upper position. After insertion of an upper end of the linkage element 5 with a rod thread 7 in the inner space of the tubular body 14 is lowered for clamping the lifting plate 36 via the piston 39. Accordingly, the slide member 32 and the actuating rods 52 held thereon are displaced downward. Due to the oblique arrangement of the guide holes 54 and the actuating rods 52, which form a Keilschiebermechanismus 50, the actuating rods 52 are also moved radially in the direction of the linkage axis 6 until the hardened clamping elements 12 firmly abut the outside of the linkage element 5 and this rotatably with the Connect body 14.

In dieser Position, welche in der rechten Seite der Fig. 1 dargestellt ist, kann nun über eine Rotation des Antriebsstutzens 16 eine feste Verbindung zwischen dem Gewinde 18 des Antriebsstutzens 16 und dem dazu passenden Gestängegewinde 7 durch Verschrauben erreicht werden. Der Antriebsstutzen 16 ist gegenüber dem Grundkörper 14 axial fest. Ein Drehmoment wird von dem Grundkörper 14, welcher gegenüber der Hubplatte 36 mittels des Drehlagers 38 drehbar gelagert ist, über die Vielzahnverbindung 21 auf den Antriebsstutzen 16 übertragen.In this position, which in the right side of the Fig. 1 is shown, can now be achieved by screwing a rotation of the drive nozzle 16, a firm connection between the thread 18 of the drive nozzle 16 and the matching rod thread 7. The drive port 16 is axially fixed relative to the base body 14. A torque is transmitted from the base body 14, which is rotatably mounted relative to the lifting plate 36 by means of the rotary bearing 38, via the splined connection 21 to the drive connection 16.

Der erfindungsgemäße Keilschiebermechanismus 50 erlaubt eine einfache Herstellbarkeit, da normale zylindrische Bohrungen und einfache Zylinderstangen verwendet werden können, wobei die Keilwirkung lediglich durch eine schräge Anordnung der Führungsbohrungen 54 erreicht wird. Die Betätigungsstangen 52 können relativ lang ausgebildet werden, so dass sich auch bei großen Spannkräften relativ geringe Flächenpressungen zwischen den Betätigungsstangen 52 und dem Grundkörper 14 ergeben. Hierdurch wird einem Verklemmen des Spannkopfes 10 entgegengewirkt und der notwendige Kraftaufwand zum Lösen der Spannposition vermindert.The wedge slide mechanism 50 according to the invention allows easy manufacturability, since normal cylindrical bores and simple cylinder rods can be used, wherein the wedge effect is achieved only by an oblique arrangement of the guide bores 54. The actuating rods 52 can be made relatively long, so that even with large clamping forces relatively low surface pressures between the actuating rods 52 and the base 14 result. As a result, jamming of the clamping head 10 is counteracted and reduces the force required to release the clamping position.

Claims (8)

  1. Chuck head for a rod element (5) comprising
    - clamping elements (12) for clamping the rod element (5) radially to its rod axis (6),
    - a lifting means (30) for producing an axial lifting movement and
    - a wedge-shaped sliding mechanism (50), through which the axial lifting movement can be converted into a radial movement and can be transmitted to the clamping elements (12) in order to clamp the rod element (5),
    characterized in that
    - the lifting means (30) has a slide member (32), which is supported in an axially displaceable manner on the base body (14), and at least one operating cylinder,
    - in that the wedge-shaped sliding mechanism (50) is formed by at least two actuating rods (52) which are supported in a displaceable manner in a base body (14) in guide bores (54) directed obliquely to the rod axis (6) and
    - in that the actuating rods (52) are connected at one end to the slide member (32) of the lifting means (30) and at the other end a clamping element (12) is arranged in each case in a direct manner.
  2. Chuck head according to claim 1,
    characterized in that
    the actuating rod (52) is held on the slide member (32) in an axially fixed and radially displaceable manner.
  3. Chuck head according to claim 1 or 2,
    characterized in that
    the lifting means (30) has a lifting plate (36), to which the slide member (32) is connected in a rotatable manner by means of a pivot bearing (38).
  4. Chuck head according to any one of claims 1 to 3,
    characterized in that
    the lifting means (30) has a spring mechanism for an axial resetting movement.
  5. Chuck head according to any one of claims 1 to 4,
    characterized in that
    a drive socket (16) having a rod connecting means, in particular a thread (18), is provided and
    in that the drive socket (16) can be driven in a rotating manner.
  6. Chuck head according to claim 5,
    characterized in that
    the drive socket (16) is supported in an axially fixed manner with respect to the base body (14).
  7. Drilling device having a drill drive for driving a drill rod in a rotating manner, which is composed of individual rod elements (5),
    characterized in that
    a chuck head (10) according to any one of claims 1 to 6 is provided.
  8. Drilling device according to claim 7,
    characterized in that
    the drive socket (16) of the chuck head (10) forms the output of the drill drive.
EP07400003A 2007-01-30 2007-01-30 Chuck head for a rod element Not-in-force EP1956183B1 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
AT07400003T ATE438019T1 (en) 2007-01-30 2007-01-30 CLAMPING HEAD FOR A ROD ELEMENT
ES07400003T ES2328979T3 (en) 2007-01-30 2007-01-30 HOLDING HEAD FOR A BAR ELEMENT WITH TENSORS.
DE502007001181T DE502007001181D1 (en) 2007-01-30 2007-01-30 Clamping head for a linkage element
EP07400003A EP1956183B1 (en) 2007-01-30 2007-01-30 Chuck head for a rod element

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP07400003A EP1956183B1 (en) 2007-01-30 2007-01-30 Chuck head for a rod element

Publications (2)

Publication Number Publication Date
EP1956183A1 EP1956183A1 (en) 2008-08-13
EP1956183B1 true EP1956183B1 (en) 2009-07-29

Family

ID=38093709

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07400003A Not-in-force EP1956183B1 (en) 2007-01-30 2007-01-30 Chuck head for a rod element

Country Status (4)

Country Link
EP (1) EP1956183B1 (en)
AT (1) ATE438019T1 (en)
DE (1) DE502007001181D1 (en)
ES (1) ES2328979T3 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114233213B (en) * 2021-11-15 2024-08-30 徐州徐工基础工程机械有限公司 Quick clamping device of water well drilling machine and operation method thereof
CN117967215B (en) * 2024-03-29 2024-06-04 江苏诚创智能装备有限公司 Six binding clip power slips
CN118008170B (en) * 2024-04-10 2024-06-21 西安宇星石油机械新技术开发有限公司 Top anti-falling chuck is prevented in combined type hydraulic gear drive

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3105565C1 (en) * 1981-02-16 1982-09-30 Wirth Maschinen- und Bohrgeräte-Fabrik GmbH, 5140 Erkelenz Clamping device for drill columns, pipes or similar objects
US5297833A (en) * 1992-11-12 1994-03-29 W-N Apache Corporation Apparatus for gripping a down hole tubular for support and rotation
IT1292266B1 (en) * 1997-04-22 1999-01-29 Soilmec Spa LOCKING DEVICE FOR THE LOADING AND SCREWING OF A BATTERY OF RODS AND LINING PIPES FOR USE IN
ATE328185T1 (en) * 1999-03-05 2006-06-15 Varco Int INSTALLATION AND REMOVAL DEVICE FOR PIPES

Also Published As

Publication number Publication date
ES2328979T3 (en) 2009-11-19
EP1956183A1 (en) 2008-08-13
DE502007001181D1 (en) 2009-09-10
ATE438019T1 (en) 2009-08-15

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