EP3141690B1 - Drill pipe gripper - Google Patents
Drill pipe gripper Download PDFInfo
- Publication number
- EP3141690B1 EP3141690B1 EP15184878.5A EP15184878A EP3141690B1 EP 3141690 B1 EP3141690 B1 EP 3141690B1 EP 15184878 A EP15184878 A EP 15184878A EP 3141690 B1 EP3141690 B1 EP 3141690B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- drill rod
- gripper
- drive
- drill
- pushing claw
- 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.)
- Active
Links
- 210000000078 claw Anatomy 0.000 claims description 85
- 238000005553 drilling Methods 0.000 claims description 18
- 238000010276 construction Methods 0.000 description 3
- 230000033001 locomotion Effects 0.000 description 3
- 239000011435 rock Substances 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- 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
- E21B19/161—Connecting or disconnecting pipe couplings or joints using a wrench or a spinner adapted to engage a circular section of pipe
- E21B19/164—Connecting or disconnecting pipe couplings or joints using a wrench or a spinner adapted to engage a circular section of pipe motor actuated
-
- 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
- E21B19/08—Apparatus for feeding the rods or cables; Apparatus for increasing or decreasing the pressure on the drilling tool; Apparatus for counterbalancing the weight of the rods
- E21B19/087—Apparatus for feeding the rods or cables; Apparatus for increasing or decreasing the pressure on the drilling tool; Apparatus for counterbalancing the weight of the rods by means of a swinging arm
-
- 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
- E21B19/168—Connecting or disconnecting pipe couplings or joints using a spinner with rollers or a belt adapted to engage a well pipe
-
- 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
- E21B19/20—Combined feeding from rack and connecting, e.g. automatically
Definitions
- Such drill string grippers are used in particular in drilling rigs for earth or rock drilling, which approximately in the EP 1 832 710 B1 are described. These have a drilling device with drill carriage, along which a drill drive for drilling drill pipe elements of different diameters is slidably mounted. The drill pipe elements may be partially inserted into one another in a magazine near the drilling device. By means of a drill string gripper, drill pipe elements can be transported from the magazine to the drilling device and back again.
- the drill pipe gripper can be controlled automatically by means of a drill string manipulator or operated by hand.
- From the EP 2 713 003 B1 shows a rod handling system for drilling rigs, which has a collet with two pivoting swivel claws. By pivoting the pivoting claws inwardly, a drill string member is urged against a central locating roller, thus tensioning the drill string member.
- the drive rollers are mounted on the two pivoting claws and rotationally driven via a respective rotary drive. By these drive rollers on the pivoting jaws, the drill string element can be driven in rotation in the cocked position. This is advantageous, for example, for screwing the tensioned drill pipe element to the drill string.
- the swivel claws For receiving the rotary actuator, the swivel claws must be exposed and sufficiently dimensioned to prevent damage.
- the known drill string gripper is only limitedly suitable for gripping a drill string element from a drill pipe magazine.
- the arranged on the pivoting claws, above rotary actuators can be damaged in an intervention in a boom magazine.
- the drill pipe elements must be placed in a drill pipe storage with a relatively large distance from each other, so that the drill string gripper can grip and clamp a single drill string element.
- a large distance between the drill pipe elements reduces the capacity of a drill pipe magazine or leads to an increased size.
- the invention has for its object to provide a drill string gripper, which is both compact and very versatile.
- the drill string gripper according to the invention is characterized in that at least one drive roller for rotatably driving a drill string element is rotatably mounted on the thrust pawl, that a rotary drive is arranged on the thrust pawl and that the rotary drive is designed for rotationally driving the drive roller and is connected to the drive roller.
- a basic idea of the invention is to provide a drive roller with a rotary drive at the central push claw in the case of a collet chuck with a compact construction and a fork-shaped collet housing.
- a slim structure can be maintained at the protected in the forceps tines pivoting claw.
- the rotary drive is arranged when engaging in a drill pipe magazine in a rearward and thus also protected position. The risk of damage such as a tilted engagement of the collet in a magazine is thereby significantly reduced.
- the drill string gripper can also be used separately from a magazine, such as a screwing.
- the drill string gripper according to the invention offers the additional advantage, in the case of the compact construction, that a tensioned drill string element can be driven in rotation via the drive roller on the push claw. This is about Screwing drill pipe elements with threaded sections or loosening a threaded connection possible.
- the rotary drive can preferably be a hydraulic drive or an electric drive.
- the rotary drive can be arranged in the tong housing.
- a compact construction of the collet is achieved according to an embodiment of the drill string gripper in that at least one recess is formed on the pliers housing laterally on the push claw, wherein at least one side portion of the push claw in the clamping position and the retreat position is exposed, and that the rotary drive at the exposed Side region of the push claw is arranged. Since the rotary drive is attached to the rear push claw, a good protection is already achieved.
- the rotary drive projects laterally out of the clamp housing.
- the rotary drive is directed substantially parallel to the longitudinal axis of the drill string element to be clamped.
- the recess provided in the invention in the region of the fork clearance, that the rotary drive can be fixedly attached to the side region or the edge of the push claw and is linearly movable with the push claw.
- a particularly good torque transmission to a drill pipe element to be tensioned results according to a further embodiment of the invention in that two drive rollers are mounted on the push claw.
- the two drive rollers are preferably arranged symmetrically to a center plane of the collet. As a result, a centric holding of the drill string element to be clamped is supported at the same time.
- the at least one drive roller may be provided on its outer side with friction-increasing means, in particular with a groove structure or a friction-increasing coating.
- the two drive rollers can in principle be driven by a single rotary drive with a corresponding gear stage.
- a first drive roller it is particularly preferred for a first drive roller to have at least one drive roller a first rotary drive and a second drive roller with at least one second rotary drive are driven.
- a particularly compact arrangement according to a further embodiment of the invention can be achieved in that the first rotary drive and the second rotary drive protrude from the tong housing on the same side.
- a further increase in the torque to be transmitted is achieved in a further development according to the invention in that a drive roller is driven by two rotary drives, which are arranged on opposite side regions of the push claw. There is thus provided a double arrangement of rotary drives for a single drive roller. This makes it possible to arrange particularly compact small rotary drives, while still a high torque can be applied to the drive roller.
- the at least one rotary drive has a substantially cylindrical housing with a center axis, which is directed substantially parallel to the axis of rotation of the drive roller.
- the axis of rotation of the drive roller is coaxial with the drive shaft of the rotary drive.
- a direct drive may be provided in which no gear stage is arranged between the exit shaft of the rotary drive and the drive roller.
- a gear ratio or gear reduction between rotary drive and drive roller can be provided.
- At least one contact roller is mounted on the pivoting jaws, which rests in the clamping position on the drill string element to be clamped.
- the investment rollers are passive rollers, which are not driven directly rotating.
- the rollers are arranged so that they protrude only slightly beyond the front surfaces of the pivoting jaws. The rollers considerably reduce the friction when turning the linkage.
- the investment rollers can be rolling bearings.
- the pliers housing has two mutually spaced side plates, which are interconnected via web elements.
- the web elements are preferably arranged parallel to the longitudinal direction of the drill string element to be gripped.
- the two plates can be the same.
- a connection of the side plates on the web elements is preferably carried out via bolts.
- a particularly accurate position gripping is achieved according to a development of the invention in that the lever mechanism is designed so that the extension of the push claw the pivoting jaws and the thrust pawl are moved evenly on a longitudinal axis of the drill string to exciting.
- the current extension positions of the push claw and the two pivoting claws preferably always lie on a momentary contact circle, which always has the same center point. This center coincides with the application on a drill with the drilling axis.
- the circle of contact is to be understood as the circle on which the contact points of the clamping claws lie with the outer surface of a cylindrical drill pipe element to be clamped.
- two or more collets of a drill string gripper can simultaneously engage telescoping drill string members of different bore diameters without having to pre-adjust the chuck claws.
- a single drill string element with a different outside diameter can then be gripped again using both collets.
- This can preferably be achieved by arranging the axes of the pivot bearings of the pivot claws so that a connecting line between the two pivot axes intersects the longitudinal axis of the drill string element to be clamped.
- the connecting line represents the shortest connection between the two pivot axes of the pivot bearing of the opposite pivoting jaws.
- a secure gripping is further increased according to a preferred embodiment of the invention in that at least two collets are provided, which are arranged along a gripper frame.
- the two Collets arranged at the respective outer end of the bar-shaped carrier.
- three or more collets may also be arranged along the gripper frame.
- all collets are provided with drive rollers according to the invention.
- only one collet is provided with a rotating drive means, while the other or the other collets are provided only with passive, that is not driven rollers for rotatable, low-friction holding a drill string element.
- the laterally projecting rotary drives in two driven collets are preferably directed inwardly towards the carrier.
- the carrier may be formed as a profile with a U-shaped receiving space, in which protrude laterally projecting rotary drives and are arranged so protected.
- the direction of rotation of the rotary drive can be adjusted freely.
- a development of the invention is that a BohrgestShemanipulator is provided with a drill string gripper, which is arranged adjustable on a manipulator.
- the drill string gripper is configured according to the previous embodiments.
- the drill string gripper is in particular attached to a multi-axis manipulator arm with which the drill string gripper with several degrees of freedom in space is adjustable. With the manipulator arm small feed movements or complex handling operations can be performed, such as transporting a linkage element from and to a rod magazine.
- the invention comprises a drill with a drill pipe magazine for magazineing drill pipe elements and a drilling device with drill drive for drilling the drill pipe elements, wherein the above-described drill string gripper is provided.
- a drill as in the aforementioned EP 1 832 710 B1 which is attributable to the Applicant.
- the drill string gripper is arranged on the aforementioned manipulator arm.
- a drill pipe gripper 10 according to the invention Fig. 1 has a gripper frame 12, with which the drill string gripper 10 is attached to a only partially shown and schematically indicated manipulator arm 52 of a BohrgestShemanipulators 50.
- manipulator arm 52 By means of the manipulator arm 52 partially shown, the drill string gripper 10 can be moved, in particular to transport drill string elements from a drill pipe magazine to a drilling device and back again.
- a carrier 14 is arranged, at the two outer ends of each of which a collet 20 are mounted for gripping the drill string element.
- the two collets 20 are preferably identical and according to the illustrated embodiment.
- the collet 20 in this case has a fork-shaped pliers housing 22, which comprises two side plates 21, which are firmly connected to one another via web elements 25.
- a clamping cylinder 26 is arranged in a rear region, which is usually designed as a hydraulic cylinder. With the clamping cylinder 26, a push claw 45 is driven linearly displaceable within the pliers housing 22.
- Mechanically coupled to the push claw 45 are two pivotally mounted pivoting jaws 30, which are arranged within a receiving space 24 in the two forceps tines 23 of the fork-shaped forceps housing 22.
- two drive rollers 46 are rotatably mounted on the push claw.
- the drive rollers 46 are each rotationally driven by means of a rotary drive 47, which are fixed to a side portion 48 of the push claw 45 and a recess 29 project through the side plate 21 of the tong housing 22 in the direction of the transverse support 14.
- the carrier 14 is designed as a U-profile, in the U-shaped receiving area, the rotary actuators 47 are arranged protected.
- two abutment rollers 32 are each rotatably mounted, which in a clamping position on an outer side of the tensioned drill pipe element issue. This makes it possible that a drill string element is reliably tensioned and simultaneously rotatable.
- Fig. 2 is the collet 20 of Fig. 1 shown enlarged.
- a first rotary drive 47a and a second rotary drive 47b are releasably attached on the side region 48 of the push claw 45.
- the first rotary drive 47a drives a first drive roller 46a
- the second drive roller 46b is directly rotatable by the second rotary drive 47b.
- a clearance between the forceps tines 23 is at least on the side plate 21 of the tong housing 22, on which the rotary drives 47 are arranged, extended by a recess 29 to the rear. Through the recess 29 of the side portion 48 is exposed to the rotary actuators 47 both in the shown rear retraction position and in the extended, front clamping position of the push claw 45.
- FIG Fig. 3 An alternative embodiment of a collet 20 is shown in FIG Fig. 3 shown.
- the first drive roller 46a is driven via two rotary drives 47a, 47c, which are respectively fastened to opposite side regions 48 of the push claw 45.
- the second drive roller 46b is driven via two oppositely disposed rotary drives 47b, 47d.
- a twin arrangement of rotary drives 47 a total of smaller rotary drives 47 can be used, wherein nevertheless a relatively large torque can be applied to the drive roller 46.
- Both side plates 21 of the tong housing 22 are provided with recesses 29 for the rotary drives 47.
- FIGS. 4 to 6 a clamping position of the collet 20, in which the push claw 45 and the two pivoting claws 30 are extended from their respective retreat position in the tong housing 22.
- the pivoting jaws 30 are each extended out of their receiving space 24, which are formed in the forceps tines 23 of the tong housing 22.
- the pivoting claws 30 are retracted into the receiving space 24 and are not or not significantly beyond an outer contour of the fork-shaped tong housing 22 addition.
- a drill pipe element 5 is stretched by extending a piston rod 27 of the clamping cylinder 26.
- the attached push claw 45 is extended to the outer periphery of the drill pipe element 5.
- the drive rollers 46 of the pawl 45 symmetrically contact the drill string member 5 symmetrically to a center plane of the collet 20.
- the outer sides of the drive rollers 46 are provided with a groove structure.
- an intermediate lever 28 is articulated in each case.
- At the opposite end of the intermediate lever 28 of this is connected in each case via a pivot point 34 pivotally connected to a mounting portion 38 of the lever-shaped pivoting claw 30.
- the two pivoting claws 30 are each pivotally mounted about a pivot bearing 40 about an axis 42 on the tong housing 22.
- the pivot bearing 40 is arranged approximately centrally between the actuating portion 38 and a claw portion 36 of the pivoting jaw 30.
- the clamping jaws respectively reach the illustrated clamping position, against which the three clamping jaws are distributed over the circumference of the drill pipe element 5.
- the claw portion 36 of the pivoting claws 30 each formed by rolling bearing bearing rollers 32 are rotatably mounted.
- the abutment rollers 32 form the abutment or contact area of the pivoting claws 30 to the drill pipe element 5.
- Toggle mechanism shown with an intermediate lever 28 allows a tensioning of a drill string element 5 with a relatively large contact pressure of the clamping jaws, so that a safe and even with changing outer diameters of the drill string element 5 positionally accurate gripping is achieved.
- a drill 1 with a drill gripper 10 according to the invention is exemplary in the FIGS. 7 to 9 shown.
- the drill 1 has in a known manner a bar-like drill carriage 2, along which a drill drive 4 is shown only partially movable.
- An upper drill pipe element 5b of an already drilled drill pipe element 5b is held against rotation at the lower end of the drill carriage 2 by means of a holding unit 6 and tensioned.
- For screwing on a further drill pipe element 5a this is supplied in the embodiment shown via a feed device 8 in the drilling axis.
- a drill pipe gripper 10 according to the invention with a single collet 20 from a retraction position which is shown in FIG Fig. 8 is shown, moved by means of a traversing device 16 in the direction of the drill pipe element 5a to be screwed.
- the traversing device 16 represents a simplified manipulator arm, which is linearly movable only in one axial direction.
- the two drill pipe elements 5a, 5b can also be released from each other again.
- the threaded connection is first broken by an initial rotation through the connecting and breaking unit 8 and then carried out the further unscrewing of the threaded connection with the drill string gripper 10 according to the invention.
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (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)
- Earth Drilling (AREA)
Description
Die Erfindung betrifft einen Bohrgestängegreifer mit mindestens einer Spannzange zum Greifen eines Bohrgestängeelementes, mit
- einem gabelförmigen Zangengehäuse mit Zangenzinken zum Eingreifen in ein Gestängemagazin,
- zwei Schwenkklauen, von denen jeweils eine in einem Aufnahmeraum in den Zangenzinken des Zangengehäuses schwenkbar gelagert ist,
- einer mittigen Schubklaue, welche zwischen den zwei Schwenkklauen angeordnet und in dem Zangengehäuse linear verschiebbar gelagert ist,
- einem Hebelmechanismus, über welchen die Schwenkklauen mit der Schubklaue gekoppelt sind, und
- einem Spannzylinder zum linearen Verschieben der Schubklaue, wobei die Schubklaue und die beiden Schwenkklauen zwischen einer Rückzugsposition, in welche die Schenkklauen in ihrem Aufnahmeraum eingeschwenkt sind, und einer Spannposition bewegbar sind, bei welcher die Schwenkklauen aus ihren Aufnahmeräumen ausgeschwenkt und zusammen mit der Schubklaue an ein zu spannendes Bohrgestängeelement angelegt sind,
- a fork-shaped pliers housing with forceps tines for engagement in a rod magazine,
- two pivoting jaws, one of which is pivotally mounted in a receiving space in the forceps tines of the tong housing,
- a central thrust jaw, which is arranged between the two pivoting jaws and mounted linearly displaceably in the jaw housing,
- a lever mechanism, via which the pivoting claws are coupled to the push claw, and
- a clamping cylinder for linear displacement of the push claw, wherein the push claw and the two pivoting claws between a retracted position in which the Schenkklauen are pivoted in their receiving space, and a clamping position are movable, wherein the pivoting claws swung out of their receiving spaces and together with the push claw on a are created to exciting drill pipe element,
Derartige Bohrgestängegreifer werden insbesondere bei Bohrgeräten zum Erd- oder Gesteinsbohren eingesetzt, welche etwa in der
Aus der
Aus der
Der bekannte Bohrgestängegreifer ist nur begrenzt für das Greifen eines Bohrgestängeelementes aus einem Bohrgestängemagazin geeignet. Die an den Schwenkklauen angeordneten, vorstehenden Drehantriebe können bei einem Eingreifen in ein Gestängemagazin beschädigt werden. Zudem müssen die Bohrgestängeelemente in ein Bohrgestängemagazin mit einem relativ großen Abstand zueinander angeordnet werden, so dass der Bohrgestängegreifer ein einzelnes Bohrgestängeelement greifen und spannen kann. Ein großer Abstand zwischen den Bohrgestängeelementen reduziert die Aufnahmekapazität eines Bohrgestängemagazins oder führt zu einer erhöhten Baugröße. Insbesondere bei Bohrgeräten ist es jedoch gewünscht, Bohrgestängemagazine kompakt und leicht auszubilden, um diese unmittelbar am Bohrgerät anordnen zu können.The known drill string gripper is only limitedly suitable for gripping a drill string element from a drill pipe magazine. The arranged on the pivoting claws, above rotary actuators can be damaged in an intervention in a boom magazine. In addition, the drill pipe elements must be placed in a drill pipe storage with a relatively large distance from each other, so that the drill string gripper can grip and clamp a single drill string element. A large distance between the drill pipe elements reduces the capacity of a drill pipe magazine or leads to an increased size. Especially in drilling machines, however, it is desired to make drill pipe magazines compact and easy to be able to arrange them directly on the drill.
Aus der
Der Erfindung liegt die Aufgabe zugrunde, einen Bohrgestängegreifer anzugeben, welcher sowohl kompakt als auch besonders vielseitig einsetzbar ist.The invention has for its object to provide a drill string gripper, which is both compact and very versatile.
Die Aufgabe wird nach der Erfindung durch einen Bohrgestängegreifer mit den Merkmalen des Anspruchs 1 gelöst. Bevorzugte Ausführungsformen des erfindungsgemäßen Bohrgestängegreifers sind in den abhängigen Ansprüchen angegeben.The object is achieved according to the invention by a drill pipe gripper with the features of claim 1. Preferred embodiments of the drill pipe gripper according to the invention are specified in the dependent claims.
Der erfindungsgemäße Bohrgestängegreifer ist dadurch gekennzeichnet, dass an der Schubklaue mindestens eine Antriebsrolle zum drehenden Antreiben eines Bohrgestängeelementes drehbar gelagert ist, dass an der Schubklaue ein Drehantrieb angeordnet ist und dass der Drehantrieb zum drehenden Antreiben der Antriebsrolle ausgebildet und mit der Antriebsrolle verbunden ist.The drill string gripper according to the invention is characterized in that at least one drive roller for rotatably driving a drill string element is rotatably mounted on the thrust pawl, that a rotary drive is arranged on the thrust pawl and that the rotary drive is designed for rotationally driving the drive roller and is connected to the drive roller.
Ein Grundgedanke der Erfindung liegt darin, bei einer Spannzange eines Bohrgreifers mit einem kompakten Aufbau und einem gabelförmigen Zangengehäuse eine Antriebsrolle mit Drehantrieb an der mittigen Schubklaue vorzusehen. Dabei kann ein schlanker Aufbau an den in den Zangenzinken geschützt angeordneten Schwenkklauen beibehalten werden. Dies ermöglicht, es den Bohrgestängegreifer weiter in kompakte Bohrgestängemagazine mit nah beieinander angeordneten Bohrgestängeelementen einzufahren, wobei die empfindlichen, schwenkbar gelagerten Schwenkklauen in dem Zangengehäuse geschützt sind. Der Drehantrieb ist beim Eingreifen in ein Bohrgestängemagazin in einer rückwärtigen und damit ebenfalls geschützten Position angeordnet. Die Gefahr von Beschädigungen etwa bei einem verkanteten Eingreifen der Spannzange in ein Magazin ist hierdurch erheblich reduziert. Der Bohrgestängegreifer kann aber auch getrennt von einem Magazin, etwa als eine Verschraubeinheit eingesetzt werden.A basic idea of the invention is to provide a drive roller with a rotary drive at the central push claw in the case of a collet chuck with a compact construction and a fork-shaped collet housing. In this case, a slim structure can be maintained at the protected in the forceps tines pivoting claw. This allows the drill pipe gripper to continue to retract into compact drill pipe racks with closely spaced drill pipe elements, with the delicate, pivotally mounted swivel claws protected within the clamp housing. The rotary drive is arranged when engaging in a drill pipe magazine in a rearward and thus also protected position. The risk of damage such as a tilted engagement of the collet in a magazine is thereby significantly reduced. The drill string gripper can also be used separately from a magazine, such as a screwing.
Des Weiteren bietet der erfindungsgemäße Bohrgestängegreifer bei dem kompakten Aufbau den zusätzlichen Vorteil, dass ein gespanntes Bohrgestängeelement über die Antriebsrolle an der Schubklaue drehend angetrieben werden kann. Damit ist etwa ein Verschrauben von Bohrgestängeelementen mit Gewindeabschnitten oder ein Lösen einer Gewindeverbindung möglich. Der Drehantrieb kann dabei vorzugsweise ein Hydraulikantrieb oder ein Elektroantrieb sein.Furthermore, the drill string gripper according to the invention offers the additional advantage, in the case of the compact construction, that a tensioned drill string element can be driven in rotation via the drive roller on the push claw. This is about Screwing drill pipe elements with threaded sections or loosening a threaded connection possible. The rotary drive can preferably be a hydraulic drive or an electric drive.
Grundsätzlich kann der Drehantrieb im Zangengehäuse angeordnet sein. Ein kompakter Aufbau der Spannzange wird gemäß einer Ausführungsform des erfindungsgemäßen Bohrgestängegreifers dadurch erreicht, dass an dem Zangengehäuse seitlich an der Schubklaue mindestens eine Ausnehmung ausgebildet ist, wobei mindestens ein Seitenbereich der Schubklaue in der Spannposition und der Rückzugsposition freiliegt, und dass der Drehantrieb an dem freiliegenden Seitenbereich der Schubklaue angeordnet ist. Da der Drehantrieb an der rückwärtigen Schubklaue angebracht ist, wird bereits ein guter Schutz erreicht.In principle, the rotary drive can be arranged in the tong housing. A compact construction of the collet is achieved according to an embodiment of the drill string gripper in that at least one recess is formed on the pliers housing laterally on the push claw, wherein at least one side portion of the push claw in the clamping position and the retreat position is exposed, and that the rotary drive at the exposed Side region of the push claw is arranged. Since the rotary drive is attached to the rear push claw, a good protection is already achieved.
Vorzugsweise ist gemäß einer Ausführungsvariante der Erfindung vorgesehen, dass der Drehantrieb seitlich aus dem Zangengehäuse ragt. Der Drehantrieb ist dabei im Wesentlichen parallel zur Längsachse des zu spannenden Bohrgestängeelementes gerichtet. Weiterhin wird durch die nach der Erfindung vorgesehene Ausnehmung im Bereich des Gabelfreiraumes erreicht, dass der Drehantrieb fest am Seitenbereich oder der Flanke der Schubklaue befestigt sein kann und mit der Schubklaue linear verfahrbar ist.Preferably, according to an embodiment variant of the invention, it is provided that the rotary drive projects laterally out of the clamp housing. The rotary drive is directed substantially parallel to the longitudinal axis of the drill string element to be clamped. Furthermore, it is achieved by the recess provided in the invention in the region of the fork clearance, that the rotary drive can be fixedly attached to the side region or the edge of the push claw and is linearly movable with the push claw.
Grundsätzlich kann es ausreichend sein, dass lediglich eine einzelne Antriebsrolle in der Mitte der Schubklaue vorgesehen ist. Eine besonders gute Drehmomentübertragung auf ein zu spannendes Bohrgestängeelement ergibt sich nach einer weiteren Ausführungsform der Erfindung dadurch, dass zwei Antriebsrollen an der Schubklaue gelagert sind. Die beiden Antriebsrollen sind vorzugsweise symmetrisch zu einer Mittenebene der Spannzange angeordnet. Hierdurch wird gleichzeitig ein zentrisches Halten des zu spannenden Bohrgestängeelementes unterstützt.In principle, it may be sufficient that only a single drive roller is provided in the middle of the push claw. A particularly good torque transmission to a drill pipe element to be tensioned results according to a further embodiment of the invention in that two drive rollers are mounted on the push claw. The two drive rollers are preferably arranged symmetrically to a center plane of the collet. As a result, a centric holding of the drill string element to be clamped is supported at the same time.
Die mindestens eine Antriebsrolle kann an ihrer Außenseite mit reibungserhöhenden Mitteln versehen sein, insbesondere mit einer Rillenstruktur oder einer reibungserhöhenden Beschichtung.The at least one drive roller may be provided on its outer side with friction-increasing means, in particular with a groove structure or a friction-increasing coating.
Die zwei Antriebsrollen können grundsätzlich von einem einzelnen Drehantrieb mit einer entsprechenden Getriebestufe angetrieben sein. Besonders bevorzugt ist es nach einer Ausführungsvariante der Erfindung, dass eine erste Antriebsrolle mit zumindest einem ersten Drehantrieb und eine zweite Antriebsrolle mit zumindest einem zweiten Drehantrieb angetrieben sind.The two drive rollers can in principle be driven by a single rotary drive with a corresponding gear stage. According to one embodiment variant of the invention, it is particularly preferred for a first drive roller to have at least one drive roller a first rotary drive and a second drive roller with at least one second rotary drive are driven.
Dabei kann eine besonders kompakte Anordnung nach einer weiteren Ausführungsform der Erfindung dadurch erreicht werden, dass der erste Drehantrieb und der zweite Drehantrieb an der gleichen Seite aus dem Zangengehäuse ragen.In this case, a particularly compact arrangement according to a further embodiment of the invention can be achieved in that the first rotary drive and the second rotary drive protrude from the tong housing on the same side.
Eine weitere Erhöhung des zu übertragenden Drehmomentes wird bei einer erfindungsgemäßen Weiterbildung dadurch erreicht, dass eine Antriebsrolle von zwei Drehantrieben angetrieben ist, welche an gegenüberliegenden Seitenbereichen der Schubklaue angeordnet sind. Es ist somit eine doppelte Anordnung von Drehantrieben für eine einzelne Antriebsrolle vorgesehen. Dies ermöglicht, besonders kompakte kleine Drehantriebe anzuordnen, wobei dennoch ein hohes Drehmoment auf die Antriebsrolle aufbringbar ist.A further increase in the torque to be transmitted is achieved in a further development according to the invention in that a drive roller is driven by two rotary drives, which are arranged on opposite side regions of the push claw. There is thus provided a double arrangement of rotary drives for a single drive roller. This makes it possible to arrange particularly compact small rotary drives, while still a high torque can be applied to the drive roller.
Eine besonders robuste Ausgestaltung wird nach einer weiteren Ausführungsform der Erfindung dadurch erreicht, dass der mindestens eine Drehantrieb ein im Wesentlichen zylindrisches Gehäuse mit einer Mittenachse aufweist, welche im Wesentlichen parallel zur Drehachse der Antriebsrolle gerichtet ist. Vorzugsweise ist die Drehachse der Antriebsrolle koaxial zur Antriebswelle des Drehantriebes. Es kann insbesondere ein Direktantrieb vorgesehen sein, bei welcher zwischen der Austrittswelle des Drehantriebes und der Antriebsrolle keine Getriebestufe angeordnet ist. In besonderen Fällen kann auch eine Getriebeübersetzung oder Getriebeuntersetzung zwischen Drehantrieb und Antriebsrolle vorgesehen sein.A particularly robust embodiment is achieved according to a further embodiment of the invention in that the at least one rotary drive has a substantially cylindrical housing with a center axis, which is directed substantially parallel to the axis of rotation of the drive roller. Preferably, the axis of rotation of the drive roller is coaxial with the drive shaft of the rotary drive. In particular, a direct drive may be provided in which no gear stage is arranged between the exit shaft of the rotary drive and the drive roller. In special cases, a gear ratio or gear reduction between rotary drive and drive roller can be provided.
Für ein gutes drehendes Antreiben des Bohrgestängeelementes ist es nach einer Weiterbildung der Erfindung vorteilhaft, dass an den Schwenkklauen jeweils mindestens eine Anlagerolle gelagert ist, welche in der Spannposition an dem zu spannenden Bohrgestängeelement anliegt. Bei den Anlagerollen handelt es sich um passive Rollen, welche nicht direkt drehend angetrieben sind. Die Rollen sind dabei so angeordnet, dass diese nur geringfügig über die Vorderflächen der Schwenkklauen hinausragen. Durch die Rollen wird die Reibung beim Drehen des Gestänges erheblich vermindert. In fertigungstechnisch einfacher Weise können die Anlagerollen Wälzlager sein.For a good rotational driving of the drill pipe element, it is advantageous according to a development of the invention that at least one contact roller is mounted on the pivoting jaws, which rests in the clamping position on the drill string element to be clamped. The investment rollers are passive rollers, which are not driven directly rotating. The rollers are arranged so that they protrude only slightly beyond the front surfaces of the pivoting jaws. The rollers considerably reduce the friction when turning the linkage. In manufacturing technology simple way, the investment rollers can be rolling bearings.
Für eine stabile und kompakte Ausgestaltung einer Ausführungsform des erfindungsgemäßen Bohrgestängegreifers ist es vorteilhaft, dass das Zangengehäuse zwei zueinander beabstandete Seitenplatten aufweist, welche über Stegelemente miteinander verbunden sind. Die Stegelemente sind dabei vorzugsweise parallel zur Längsrichtung des zu greifenden Bohrgestängeelementes angeordnet. Die beiden Platten können gleich ausgebildet sein. Eine Verbindung der Seitenplatten über die Stegelemente erfolgt vorzugsweise über Schraubbolzen.For a stable and compact embodiment of an embodiment of the drill pipe gripper according to the invention, it is advantageous that the pliers housing has two mutually spaced side plates, which are interconnected via web elements. The web elements are preferably arranged parallel to the longitudinal direction of the drill string element to be gripped. The two plates can be the same. A connection of the side plates on the web elements is preferably carried out via bolts.
Ein besonders positionsgenaues Greifen wird nach einer Weiterbildung der Erfindung dadurch erreicht, dass der Hebelmechanismus ausgelegt ist, dass beim Ausfahren der Schubklaue die Schwenkklauen und die Schubklaue gleichmäßig auf eine Längsachse des zu spannenden Bohrgestänges zubewegbar sind. Die momentanen Ausfahrpositionen der Schubklaue und der beiden Schwenkklauen liegen dabei vorzugsweise stets auf einem momentanen Kontaktkreis, welcher stets den gleichen Mittelpunkt hat. Dieser Mittelpunkt fällt bei der Anwendung an einem Bohrgerät mit der Bohrachse zusammen. Unter Kontaktkreis ist der Kreis zu verstehen, auf welchem die Berührpunkte der Spannklauen mit der äußeren Oberfläche eines zu spannenden zylindrischen Bohrgestängeelementes liegen.A particularly accurate position gripping is achieved according to a development of the invention in that the lever mechanism is designed so that the extension of the push claw the pivoting jaws and the thrust pawl are moved evenly on a longitudinal axis of the drill string to exciting. The current extension positions of the push claw and the two pivoting claws preferably always lie on a momentary contact circle, which always has the same center point. This center coincides with the application on a drill with the drilling axis. The circle of contact is to be understood as the circle on which the contact points of the clamping claws lie with the outer surface of a cylindrical drill pipe element to be clamped.
Mit dieser Anordnung können zwei oder mehrere Spannzangen eines Bohrgestängegreifers gleichzeitig ineinander gesteckte Bohrgestängeelemente mit unterschiedlichen Bohrdurchmessern konzentrisch greifen, ohne dass Voreinstellungen an den Spannklauen durchgeführt werden müssten. Es besteht so die Möglichkeit, dass mit einem solchen Bohrgestängegreifer anschließend mit beiden Spannzangen wieder ein einzelnes Bohrgestängeelement mit einem anderen Außendurchmesser gegriffen werden kann. Dies kann vorzugsweise dadurch erreicht werden, dass die Achsen der Schwenklager der Schwenkklauen so angeordnet sind, dass eine Verbindungslinie zwischen den beiden Schwenkachsen die Längsachse des zu spannenden Bohrgestängeelementes schneidet. Die Verbindungslinie stellt dabei die kürzeste Verbindung zwischen den beiden Schwenkachsen der Schwenklager der gegenüberliegenden Schwenkklauen dar.With this arrangement, two or more collets of a drill string gripper can simultaneously engage telescoping drill string members of different bore diameters without having to pre-adjust the chuck claws. There is thus the possibility that, with such a drill rod gripper, a single drill string element with a different outside diameter can then be gripped again using both collets. This can preferably be achieved by arranging the axes of the pivot bearings of the pivot claws so that a connecting line between the two pivot axes intersects the longitudinal axis of the drill string element to be clamped. The connecting line represents the shortest connection between the two pivot axes of the pivot bearing of the opposite pivoting jaws.
Ein sicheres Greifen wird gemäß einer bevorzugten Ausführungsform der Erfindung noch dadurch erhöht, dass mindestens zwei Spannzangen vorgesehen sind, welche entlang eines Greiferrahmens angeordnet sind. Vorzugsweise sind die zwei Spannzangen an dem jeweils äußeren Ende des stangenförmigen Trägers angeordnet. Abhängig von der Größe des zu greifenden Bohrgestängeelementes können auch drei oder mehr Spannzangen entlang des Greiferrahmens angeordnet sein. Vorzugsweise sind dabei sämtliche Spannzangen mit Antriebsrollen gemäß der Erfindung versehen. Es ist jedoch auch möglich, dass lediglich eine Spannzange mit einer drehenden Antriebseinrichtung versehen ist, während die andere oder die anderen Spannzangen lediglich mit passiven, also nicht angetriebenen Rollen zum drehbaren, reibungsarmen Halten eines Bohrgestängeelementes versehen sind.A secure gripping is further increased according to a preferred embodiment of the invention in that at least two collets are provided, which are arranged along a gripper frame. Preferably, the two Collets arranged at the respective outer end of the bar-shaped carrier. Depending on the size of the drill string element to be gripped, three or more collets may also be arranged along the gripper frame. Preferably, all collets are provided with drive rollers according to the invention. However, it is also possible that only one collet is provided with a rotating drive means, while the other or the other collets are provided only with passive, that is not driven rollers for rotatable, low-friction holding a drill string element.
Die seitlich vorstehenden Drehantriebe bei zwei angetriebenen Spannzangen sind vorzugsweise nach innen zum Träger hin gerichtet. Dabei kann der Träger als ein Profil mit einem U-förmigen Aufnahmeraum ausgebildet sein, in welchen die seitlich vorstehenden Drehantriebe hineinragen und so besonders geschützt angeordnet sind. Vorzugsweise kann die Drehrichtung des Drehantriebes frei eingestellt werden.The laterally projecting rotary drives in two driven collets are preferably directed inwardly towards the carrier. In this case, the carrier may be formed as a profile with a U-shaped receiving space, in which protrude laterally projecting rotary drives and are arranged so protected. Preferably, the direction of rotation of the rotary drive can be adjusted freely.
Eine Weiterbildung der Erfindung besteht darin, dass ein Bohrgestängemanipulator mit einem Bohrgestängegreifer vorgesehen ist, welcher an einem Manipulatorarm verstellbar angeordnet ist. Der Bohrgestängegreifer ist entsprechend den vorausgehenden Ausführungen ausgestaltet. Der Bohrgestängegreifer ist insbesondere an einem mehrachsigen Manipulatorarm angebracht, mit welchem der Bohrgestängegreifer mit mehreren Freiheitsgraden im Raum verstellbar ist. Mit dem Manipulatorarm können kleine Zustellbewegungen oder komplexe Handlingsvorgänge durchgeführt werden, etwa das Transportieren eines Gestängeelementes von und zu einem Gestängemagazin.A development of the invention is that a Bohrgestängemanipulator is provided with a drill string gripper, which is arranged adjustable on a manipulator. The drill string gripper is configured according to the previous embodiments. The drill string gripper is in particular attached to a multi-axis manipulator arm with which the drill string gripper with several degrees of freedom in space is adjustable. With the manipulator arm small feed movements or complex handling operations can be performed, such as transporting a linkage element from and to a rod magazine.
Weiterhin umfasst die Erfindung ein Bohrgerät mit einem Bohrgestängemagazin zum Magazinieren von Bohrgestängeelementen und einer Bohrvorrichtung mit Bohrantrieb zum Abbohren der Bohrgestängeelemente, wobei der vorbeschriebene Bohrgestängegreifer vorgesehen ist. Es kann insbesondere ein Bohrgerät vorgesehen sein, wie es in der eingangs genannten
Die Erfindung wird nachfolgend anhand von bevorzugten Ausführungsbeispielen weiter beschrieben, welche schematisch in den Zeichnungen dargestellt sind. In den Zeichnungen zeigen:
- Fig. 1
- eine schematische perspektivische Ansicht eines erfindungsgemäßen Bohrgestängegreifers;
- Fig. 2
- eine schematische perspektivische Ansicht einer Spannzange des Bohrgestängegreifers von
Fig. 1 ; - Fig. 3
- eine perspektivische Ansicht von vorne einer alternativen Spannzange für einen erfindungsgemäßen Bohrgestängegreifer;
- Fig. 4
- eine Draufsicht auf eine Spannzange gemäß
Fig. 3 oderFig. 4 bei abgenommener Seitenplatte; - Fig. 5
- eine Draufsicht auf die Spannzange von
Fig. 4 mit Seitenplatte; - Fig. 6
- eine Draufsicht auf die Spannzange von
Fig. 4 oderFig. 5 mit schematischer Verdeutlichung des Spannmechanismus; - Fig. 7
- eine perspektivische Teilansicht eines Bohrgerätes mit einem erfindungsgemäßen Bohrgestängegreifer;
- Fig. 8
- eine Teilansicht von vorne des Bohrgerätes von
Fig. 7 mit Bohrgestängegreifer in einer Rückzugsposition; und - Fig. 9
- eine Teilansicht des Bohrgerätes von
Fig. 8 mit Bohrgestängegreifer in einer Betriebsposition.
- Fig. 1
- a schematic perspective view of a drill pipe gripper according to the invention;
- Fig. 2
- a schematic perspective view of a collet of the drill string gripper of
Fig. 1 ; - Fig. 3
- a perspective front view of an alternative collet for a drill string gripper according to the invention;
- Fig. 4
- a plan view of a collet according to
Fig. 3 orFig. 4 with removed side plate; - Fig. 5
- a plan view of the collet of
Fig. 4 with side plate; - Fig. 6
- a plan view of the collet of
Fig. 4 orFig. 5 with schematic illustration of the clamping mechanism; - Fig. 7
- a partial perspective view of a drill with a drill string gripper according to the invention;
- Fig. 8
- a partial view from the front of the drill of
Fig. 7 with drill pipe gripper in a retracted position; and - Fig. 9
- a partial view of the drill of
Fig. 8 with drill pipe gripper in an operating position.
Ein erfindungsgemäßer Bohrgestängegreifer 10 gemäß
Am Greiferrahmen 12 ist ein Träger 14 angeordnet, an dessen beiden äußeren Enden jeweils eine Spannzange 20 zum Greifen des Bohrgestängeelementes angebracht sind. Die beiden Spannzangen 20 sind vorzugsweise und entsprechend der dargestellten Ausführungsform gleich ausgebildet. Die Spannzange 20 weist dabei ein gabelförmiges Zangengehäuse 22 auf, welches zwei Seitenplatten 21 umfasst, welche über Stegelemente 25 fest miteinander verbunden sind. Innerhalb des Zangengehäuses 22 ist in einem hinteren Bereich ein Spannzylinder 26 angeordnet, welcher üblicherweise als ein Hydraulikzylinder ausgebildet ist. Mit dem Spannzylinder 26 ist eine Schubklaue 45 innerhalb des Zangengehäuses 22 linear verschiebbar angetrieben. Mechanisch gekoppelt an der Schubklaue 45 sind zwei verschwenkbar gelagerte Schwenkklauen 30, welche innerhalb eines Aufnahmeraumes 24 in den beiden Zangenzinken 23 des gabelförmigen Zangengehäuses 22 angeordnet sind.On the
Symmetrisch zu einer Mittenebene der Spannzange 20 sind an der Schubklaue 45 zwei Antriebsrollen 46 drehbar gelagert. Die Antriebsrollen 46 werden jeweils mittels eines Drehantriebes 47 drehend angetrieben, welche an einem Seitenbereich 48 der Schubklaue 45 befestigt sind und eine Ausnehmung 29 durch die Seitenplatte 21 des Zangengehäuses 22 in Richtung des quer verlaufenden Trägers 14 ragen. Der Träger 14 ist dabei als ein U-Profil ausgebildet, in dessen U-förmigen Aufnahmebereich die Drehantriebe 47 geschützt angeordnet sind. Mit den Antriebsrollen 46 kann ein aufgenommenes und gespanntes Bohrgestängeelement in dem Bohrgestängegreifer 10 drehend angetrieben werden.Symmetrical to a center plane of the
An den Schwenkklauen 30 sind jeweils zwei Anlagerollen 32 drehbar gelagert, welche in einer Spannposition an einer Außenseite des gespannten Bohrgestängeelementes anliegen. Hierdurch wird ermöglicht, dass ein Bohrgestängeelement zuverlässig gespannt und gleichzeitig drehbar ist.On the pivoting
In
Eine alternative Ausführung einer Spannzange 20 ist in
Die Funktionsweise der Spannzange 20 eines erfindungsgemäßen Bohrgestängegreifers 10 wird nachfolgend im Zusammenhang mit den
In der in den
An den Außenbereichen der plattenförmigen Schubklaue 45 ist jeweils ein Zwischenhebel 28 gelenkig gelagert. Am gegenüberliegenden Ende des Zwischenhebels 28 ist dieser jeweils über einen Anlenkpunkt 34 gelenkig mit einem Befestigungsabschnitt 38 der hebelförmigen Schwenkklaue 30 verbunden. Die beiden Schwenkklauen 30 sind jeweils über ein Schwenklager 40 um eine Achse 42 verschwenkbar am Zangengehäuse 22 gelagert. Das Schwenklager 40 ist dabei etwa mittig zwischen dem Betätigungsabschnitt 38 und einem Klauenabschnitt 36 der Schwenkklaue 30 angeordnet.At the outer regions of the plate-shaped
Durch das lineare Ausfahren der Schubklaue 45 mittels des Spannzylinders 26 wird auf die Schwenkklauen 30 jeweils über den gebildeten Hebelmechanismus mit dem angelenkten Zwischenhebel 28 ein Druck ausgeübt, durch welchen der Klauenabschnitt 36 um das Schwenklager 40 in Richtung auf die Längsachse 3 des zu spannenden Bohrgestängeelementes 5 zugeschwenkt wird.By the linear extension of the
Durch dieses Ausfahren der Schubklaue 45 und der Schwenkklauen 30 aus der Rückzugsposition im Zangengehäuse 22 gelangen die Spannklauen jeweils in die dargestellte Spannposition, an welcher die drei Spannklauen verteilt über den Umfang des Bohrgestängeelementes 5 an diesem anliegen. Dabei sind in dem Klauenabschnitt 36 der Schwenkklauen 30 jeweils durch Wälzlager gebildete Anlagerollen 32 drehbar gelagert. Die Anlagerollen 32 bilden den Anlage- oder Kontaktbereich der Schwenkklauen 30 an das Bohrgestängeelement 5.As a result of this extension of the
In der Darstellung gemäß
Dieses gleichzeitige und mehrfache Kontaktieren der Schubklaue 45 und der Schwenkklauen 30 an dem Bohrgestängeelement 5 ist weitgehend unabhängig vom Durchmesser des Bohrgestängeelementes 5, wie insbesondere aus der Darstellung gemäß
Der in den
Ein Bohrgerät 1 mit einem erfindungsgemäßen Bohrgreifer 10 ist beispielhaft in den
In der Betriebs- oder Verschraubposition, welche in
In entsprechend umgekehrter Weise können die beiden Bohrgestängeelemente 5a, 5b auch wieder voneinander gelöst werden. Dabei wird die Gewindeverbindung zunächst durch ein anfängliches Verdrehen durch die Verbindungs- und Brecheinheit 8 aufgebrochen und anschließend das weitere Aufdrehen der Gewindeverbindung mit dem erfindungsgemäßen Bohrgestängegreifer 10 durchgeführt.In a correspondingly reverse manner, the two drill pipe elements 5a, 5b can also be released from each other again. In this case, the threaded connection is first broken by an initial rotation through the connecting and breaking
Claims (14)
- Drill rod gripper with at least one collet (20) for gripping a drill rod element (5), comprising- a forked gripper casing (22) with two collet arms (23) for engaging within a rod magazine,- two swivel claws (30), one of which is mounted pivotally in a receiving space (24) in the collet arm (23) of the gripper casing (22),- a central pushing claw (45), which is arranged between the two swivel claws (30) and is mounted in the gripper casing (22) linearly movable,- a lever mechanism, through which the swivel claws (30) are coupled with the pushing claw (45), and- a clamping cylinder (26) for the linear shifting of the pushing claw (45), whereby the pushing claw (45) and the two swivel claws (30) are movable between a retracted position, in which the swivel claws (30) are swivelled into their receiving space (24), and a clamping position, in which the swivel claws (30) are swivelled out of their receiving spaces (24), and which together with the pushing claw (45) are located adjacent to a drill rod element (5) to be clamped,characterized in that- at least one drive roll (46) is mounted pivotally at the pushing claw (45) for driving a drill rod element (5) in a rotary manner,- that at least one rotation drive (47) is arranged at the pushing claw (45), and- that the rotary drive (47) is designed for rotary driving the drive roll (46) and is connected to the drive roll (46).
- Drill rod gripper according to claim 1,
characterized in that- at least one recess (29) is provided at a side of the pushing claw (45) at the gripper casing (22), whereby at least one side area (48) of the pushing claw (45) is exposed in the clamping position and the retracted position, and- in that the rotation drive (47) is arranged at the open side area (48) of the pushing claw (45). - Drill rod gripper according to claim 1 or 2,
characterized in that
the rotation drive (47) protrudes from the gripper casing (22) at the side. - Drill rod gripper according to one of the claims 1 to 3,
characterized in that
two drive rolls (49) are arranged at the pushing claw (45). - Drill rod gripper according to claim 4,
characterized in that
one first drive roll (46a) is driven by at least one first rotation drive (47a, 47c), and a second drive roll (46b) is driven by at least one second rotation drive (47b, 47d). - Drill rod gripper according to claim 5,
characterized in that
the first rotation drive (47a) and the second rotation drive (47b) protrude from the gripper casing (22) on the same side. - Drill rod gripper according to one of the claims 1 to 6,
characterized in that
one drive roll (46a) are driven by two rotation drives (47a, 47c), which are arranged at two opposite side areas (48) of the pushing claw (45). - Drill rod gripper according to one of the claims 1 to 7,
characterized in that
the at least one rotation drive (47) comprises an essentially cylindrical housing with a centre axis, which is substantially parallel to the rotating axis of the drive roll (46). - Drill rod gripper according to one of the claims 1 to 8,
characterized in that
at the swivel claws (30) at least one contact roll (32) is provided, which contacts the drill rod element (5) to be clamped in the clamping position. - Drill rod gripper according to one of the claims 1 to 9,
characterized in that
the gripping casing (22) comprises two spaced apart side panels (21), which are connected to each other by rib elements (25). - Drill rod gripper according to one of the claims 1 to 10,
characterized in that
the lever mechanism is designed in such a manner that the swivel claws (30) and the pushing claws (45) are uniformly movable towards a longitudinal axis (3) of the drill rod element (5) to be clamped, when pulling out the pushing claw (45). - Drill rod gripper according to one of the claims 1 to 11,
characterized in that
at least two collets (20) are provided, which are spaced apart from one another and connected to each other through a carrier (14). - Drill rod manipulator with a drill rod gripper (10), which is adjustably mounted on a manipulator arm (52),
characterized in that
a drill rod gripper (10) according to any of the claims 1 to 12 is provided. - Drill rig comprising a drill rod magazine for magazining drill rod elements (5) and a drilling device with a drilling drive (4) for drilling out the drill rod elements (5),
characterized in that
a drill rod gripper (10) according to any of the claims 1 to 12 is provided.
Priority Applications (2)
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NO15184878A NO3141690T3 (en) | 2015-09-11 | 2015-09-11 | |
EP15184878.5A EP3141690B1 (en) | 2015-09-11 | 2015-09-11 | Drill pipe gripper |
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EP15184878.5A EP3141690B1 (en) | 2015-09-11 | 2015-09-11 | Drill pipe gripper |
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EP3141690A1 EP3141690A1 (en) | 2017-03-15 |
EP3141690B1 true EP3141690B1 (en) | 2017-12-13 |
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CN108716372B (en) * | 2018-08-14 | 2024-03-08 | 无锡华瀚能源装备科技有限公司 | Clamp mechanism with reversible clamp arm |
CN110566141B (en) * | 2019-10-18 | 2024-06-11 | 江苏如石机械股份有限公司 | Dual-purpose power tongs for drill pipe and casing |
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DE502006001190D1 (en) | 2006-03-07 | 2008-09-04 | Klemm Bohrtechnik Gmbh | Device for loading a drilling device and drill |
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RS53961B1 (en) | 2012-09-26 | 2015-08-31 | Sandvik Intellectual Property Ab | Method of interconnecting a drill rod with a drill string by means of a threaded connection, rod handling system and drill rig |
EP2851504B1 (en) | 2013-09-18 | 2016-11-09 | Klemm Bohrtechnik GmbH | Drill pipe gripper |
-
2015
- 2015-09-11 EP EP15184878.5A patent/EP3141690B1/en active Active
- 2015-09-11 NO NO15184878A patent/NO3141690T3/no unknown
Non-Patent Citations (1)
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Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US11993988B2 (en) | 2020-05-20 | 2024-05-28 | Nabors Drilling Technologies Usa, Inc. | Torque wrench |
Also Published As
Publication number | Publication date |
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EP3141690A1 (en) | 2017-03-15 |
NO3141690T3 (en) | 2018-05-12 |
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