EP2252763A1 - Clamping head for an earth-drilling system - Google Patents
Clamping head for an earth-drilling systemInfo
- Publication number
- EP2252763A1 EP2252763A1 EP09716504A EP09716504A EP2252763A1 EP 2252763 A1 EP2252763 A1 EP 2252763A1 EP 09716504 A EP09716504 A EP 09716504A EP 09716504 A EP09716504 A EP 09716504A EP 2252763 A1 EP2252763 A1 EP 2252763A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- clamping
- hollow shaft
- head according
- sleeve
- clamping head
- 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.)
- Granted
Links
- 238000005553 drilling Methods 0.000 title abstract description 3
- 230000007246 mechanism Effects 0.000 claims abstract description 38
- 230000003993 interaction Effects 0.000 claims abstract 2
- 230000033001 locomotion Effects 0.000 claims description 45
- 230000006835 compression Effects 0.000 claims description 23
- 238000007906 compression Methods 0.000 claims description 23
- 230000009471 action Effects 0.000 claims description 4
- 239000011248 coating agent Substances 0.000 claims description 3
- 238000000576 coating method Methods 0.000 claims description 3
- 230000008901 benefit Effects 0.000 description 11
- 238000013461 design Methods 0.000 description 5
- 238000006073 displacement reaction Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 239000002689 soil Substances 0.000 description 4
- 238000010276 construction Methods 0.000 description 3
- 238000003780 insertion Methods 0.000 description 3
- 230000037431 insertion Effects 0.000 description 3
- 230000001154 acute effect Effects 0.000 description 2
- 230000000712 assembly Effects 0.000 description 2
- 238000000429 assembly Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000007480 spreading Effects 0.000 description 2
- 238000003892 spreading Methods 0.000 description 2
- 230000000087 stabilizing effect Effects 0.000 description 2
- 241000283690 Bos taurus Species 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 239000010432 diamond Substances 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 239000011343 solid material Substances 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
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
- E21B19/02—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
- E21B19/161—Connecting or disconnecting pipe couplings or joints using a wrench or a spinner adapted to engage a circular section of pipe
Definitions
- the invention relates to a chuck for a Erdbohrstrom comprising a hollow shaft, through which a drill string is feasible, wherein coaxially on the hollow shaft, a sleeve is arranged displaceably to this, which has at least one, in particular downwardly flared, in particular conically widening end portion and wherein in the hollow shaft and / or on the sleeve at least two radially displaceable to the hollow shaft clamping jaws are mounted, which have at their radially outer end with the expanding end portion cooperating contact surfaces, so that by pushing the end portion of the clamping jaws they are radially inwardly pressed and form a first tensioning mechanism for a drill string.
- the outer movable sleeve is often referred to with the widening end region as a clamping bell due to their external shape design.
- the widening end region can here as described above, e.g. be formed cone-shaped, it may be provided that in the usual working position of such a clamping head of the expanding end portion of the sleeve is located at the lower end of this sleeve, so that the displacement of the clamping jaws takes place radially inwardly into the hollow shaft, when the sleeve on the hollow shaft is pushed down and thereby the tapered downwardly expanding end portion is pushed further and further over the ends of the clamping jaws.
- the clamping jaws mentioned here can be in corresponding recesses in the hollow shaft eino, extending in the radial direction through the Hohlwellenwandung extend.
- the jaws can be attached to both the hollow shaft and the sleeve movable, or on both elements.
- the expanding region in the axial direction of the hollow shaft extending elongated holes through which pass from the outside screws, which are screwed at least in the lateral section substantially perpendicular to the contact surfaces of the clamping jaws to a loose connection to achieve between clamping jaws and sleeve.
- the jaws loosely attached to the particular conically enlarged end portion in the sleeve and can move in the axial direction within the slots relative to the sleeve, so that it can be pushed over the jaws over.
- clamping jaws are displaced radially inwardly into the hollow shaft with the sleeve, for example by a lowering of the sleeve relative to the hollow shaft, then the inner surfaces of the clamping jaws which apply to a drill string can come into contact with it, whereby an operative connection between clamping jaws and linkage can be achieved.
- Such a conclusion can exist for example in a force and / or shape and / or frictional engagement.
- the object of the invention is to provide a clamping head for a Erdbohrstrom, with which the possibility is created during a lifting movement for lifting a drill string from a borehole also carry out a torque transmission to simultaneously effect a rotation of the drill string during the lifting movement and so Lifting the drill string from the ground to simplify, as by turning the adhesion between the drill pipe and soil is reduced. It is another object of the invention to develop a clamping head so that a safe movement of the clamping jaws takes place by means of a sleeve displacement and preferably also that damage to a drill string can be avoided by the clamping jaws.
- a clamping head of the type mentioned in which in the hollow shaft, a second clamping mechanism is provided by means of a drill string in the axial direction, at least in a lifting movement in the axial direction can be fixed.
- the second clamping mechanism as well as the first clamping mechanism can be actuated by moving the sleeve which is displaceable on the hollow shaft. This has e.g. the advantage that only one drive must be present to move the sleeve.
- both clamping mechanisms can be operated independently of each other, for example, one after the other or at the same time, for example by a synchronization in a higher-level control unit controlling the drives.
- the drives can be in both versions eg each comprise at least one, preferably a plurality of evenly distributed in the hollow shaft cylinder-piston units.
- Such a clamping head has the advantage of the invention that two different clamping mechanisms are realized in the same chuck, wherein one of the clamping mechanisms can be optimally adapted to transmit torque between the hollow shaft and drill pipe and the other clamping mechanism can be optimally adapted to a To transfer axial force optimally to the drill pipe, in particular a force to pull the drill pipe out of the ground.
- the advantage according to the invention is furthermore achieved that both a lifting movement and a rotary movement can be exerted on the drill string simultaneously with the same clamping head. This can be done in the first alternative e.g. take place without that a special control must be provided, since both movements are coupled together.
- the second clamping mechanism comprises at least two clamping elements preferably more clamping elements, for example three to five clamping elements, each clamping element having a radially outer guide surface which cooperates with a guide surface in the interior of the hollow shaft, so that a movement of a clamping element in the axial direction, in particular during a movement of the clamping element in the usual working position of the clamping head down a radial movement, in particular inward is effected.
- a guide surface of a tensioning element may e.g. be formed in the shape of a portion of a truncated cone.
- the clamping elements arranged in the hollow shaft are carried along in the same direction of movement at least in regions. According to the second alternative, the clamping elements are driven separately.
- both alternatives is effected by a corresponding arrangement of the respective guide surfaces of the hollow shaft and the clamping elements that automatically takes place when moving in the axial direction and moving in the radial direction of the clamping elements, in particular so that they are wrapped around a form-fitting to a hollow shaft of the drill string can.
- the kinematic implementation of an axial movement of the clamping elements in a radial movement taking place at the same time can take place, for example, in that the cooperating guide surfaces on clamping element and hollow shaft relative to the center axis of the hollow shaft have a tendency, in particular when viewed in section have an acute angle to this ,
- a form fit between the clamping elements and a drill string can be achieved by provided on the clamping elements at their radially inner regions lying contact surfaces, which are adapted to a drill string in terms of their design, for example, to the diameter of a drill string, so that these contact surfaces, for example. have at least one cylindrical portion-shaped surface area and / or may also be adapted to a shoulder which is provided on the drill string, or a step at which the diameter of the drill string changes, in particular in the direction from top to bottom tapers.
- Such a taper may or may occur at the shoulder or step, for example, by a right-angled step relative to the axis of the drill pipe by a conical step or possibly other shapes.
- the contact surfaces of the clamping elements therefore also have surface areas which are adapted to such a shoulder or step, so that by a positive connection between the clamping elements and a drill pipe due to the abutment of the clamping elements on such a shoulder or step an axial lifting force on the drill string can be exercised when the contact surface rests against the shoulder / step, without the clamping elements in the axial direction relative to the drill pipe slip.
- the contact surfaces can be arranged on a clamping element preferably at its upper or lower end.
- a corresponding guide surface as counter surface for those guide surfaces on the respective clamping element, it may be provided in a preferred embodiment, in particular in both alternatives, that such a guide surface is formed inside the hollow shaft by a radially inwardly projecting annular region whose inner Recess forms a tapered, in particular frusto-conical lateral surface which is arranged coaxially about the center axis of the hollow shaft, in particular wherein said frustoconical surface is tapered downwards in the usual working position of the clamping head.
- a frustoconical surface on the inner ring portion inside the hollow shaft has manufacturing advantages, since such a frustoconical surface can be achieved in a simple manner by an inner boring of a shaft.
- this can be made of a solid material, a hollow shaft.
- the radially outer guide surfaces of the clamping elements can furthermore be designed as outer conical surface areas corresponding to the frustoconical lateral surface. It turns out, if both the Guide surfaces on the clamping elements and the protruding annular region are frusto-conical, or form a portion of a frusto-conical lateral surface, that there is only one specific position in which the respective guide surfaces of the clamping element and ring area touching each other form fit, because outside this particular Position the respective diameter of the individual conical surfaces relative to the center axis of the hollow shaft do not match.
- the respective guide surfaces of the clamping element and annular region are adapted to each other, that increases the positive connection between these corresponding guide surfaces with increasing positive engagement between the clamping elements and a drill pipe, ie in particular when the clamping elements by the Sleeve down and thus simultaneously pushed inward.
- the second clamping mechanism can be designed so that in the moment when there is optimal positive engagement between the clamping elements and a drill pipe and an optimal positive connection between the corresponding guide surfaces is given. It will be optimally transferred the respective forces between the surfaces in this way while avoiding too high local pressures.
- Such an embodiment also has the advantage that in a case when there is no positive connection between the clamping element and drill pipe or between the corresponding guide surfaces, these guide surfaces do not rest over their entire surface area but only selectively or linearly to each other, so that the friction between the guide surfaces is reduced in this position of the clamping elements.
- the same configuration may also be provided between the guide surfaces on the clamping jaws of the first clamping mechanism and the conically widening end portion of the outer sleeve. All of the above statements regarding the construction of the guide surfaces between the clamping elements of the second clamping mechanism and the frusto-conical lateral surface of the annular region apply analogously to the clamping jaws of the first Clamping mechanism and the frusto-conical widening end portion of the sleeve.
- the inner circumferential surface of the downwardly flared frustoconical end portion of the sleeve grooves in particular from top to bottom extending grooves having a flat groove bottom. It may be this groove bottom directly or indirectly via an intermediate element with flat contact surfaces of the clamping jaws of the first clamping mechanism in operative connection. Compared to frustoconical active surfaces, this design has the advantage that higher forces can be transmitted over the larger areas.
- the groove bottom of a groove acts directly on a flat contact surface of a clamping jaw or in a preferred embodiment, that in a groove a guide element is fixed, in which a clamping jaw is guided with its a flat contact surface having end.
- a guide element acting as an intermediate element may e.g. is formed as a U-profile with undercut profile legs, i. the inner free width between the profile legs is smaller in the upper area than in the lower area near the inner bottom of the U-profile.
- the guide can then be formed by in the two side surfaces of a clamping jaw in the region of the stop surface having the end parallel to the plane stop surface formed grooves, which engage provided on a guide element projections, in particular the respective non-undercut portion of the profile legs.
- a clamping element is displaceable in the axial direction on a bolt arranged parallel to the hollow shaft axis, which penetrates a clamping element or a radial outward-pointing projection arranged thereon.
- a tilting of the clamping elements is avoided relative to the drill pipe.
- a radial movement in particular inward is possible, it is preferably provided that such a bolt rests in a recess of the clamping element or its projection mentioned, which in extends in the radial direction, that is formed, for example, in the manner of a slot in the radial direction.
- a movement of a clamping element in the axial direction of this can be performed in the axial direction of the bolt along this, but also simultaneously move perpendicular to the extension of the bolt in the radial direction.
- the clamping elements are actuated by a movement of the outer sleeve.
- an operative connection can be provided from the interior of the hollow shaft to the outer sleeve.
- the clamping elements are movable by means of an arranged inside the hollow shaft actuator in the axial direction, in particular in the direction of increasing positive engagement relative to the drill string, wherein the actuating element is connected to the externally arranged on the hollow shaft sleeve by at least one radial web, which extends through a recess in the hollow shaft.
- the clamping elements by means of at least one arranged inside the hollow shaft, actuating element in the axial direction, in particular in the direction of increasing positive engagement are movable, wherein the at least one actuating element with a pressure ring surrounding the sleeve by at least one radial web is connected, which extends through a recess in the hollow shaft, in particular wherein the at least one web is movable in a recess in the axial direction of the hollow shaft.
- the pressure ring may preferably have a particular upper running surface, on which the second drive, in particular the hydraulic cylinder of the second drive, is supported by means of ball bearings and / or roller bearings.
- the first drive or, in the first alternative, the single drive, in particular the hydraulic cylinder of this drive can be connected to a ring element surrounding the sleeve in the second and in particular also in the first alternative supported in the axial thrust direction via ball and / or roller bearings on the sleeve, in particular wherein the ball and / or roller bearings are enclosed between two surrounding the sleeve collar.
- the thrust or tensile forces can be transmitted through different bearings on the sleeve, so in particular depending on a bearing or a group of bearings for the overrun phase and the traction phase can be provided.
- a recess in the hollow shaft has a longitudinal extent in the axial direction of the hollow shaft, so that upon movement of the sleeve or a pressure ring in the axial direction, a web extending in the radial direction through such a recess in this axial direction within the recess is also movable.
- the movement of a sleeve or a pressure ring on the outside of the hollow shaft can be transmitted into the interior of the hollow shaft characterized in that the actuator connected by the webs moves together with the sleeve.
- the movement of the actuating element can then be transmitted to the clamping elements in various ways, for example, by an actuating element acting directly and directly on a clamping element or else by an actuating element acting indirectly via intermediate-mounted elements on a clamping element, as will be explained later.
- an actuating element is annular, wherein the inner recess is provided to surround a drill string and wherein on the ring of this actuating element all clamping elements are movable simultaneously.
- the aforementioned bolts, on which the clamping elements move along are fastened to the actuating element.
- a fastening can be effected by means of a screw connection, it also being possible for the bolts to dip into guide bores which are provided on the annular region which is formed in the hollow shaft for forming the frustoconical guide surface region.
- the bolts are arranged at a distance from the center axis around this, in particular in a uniform angular pitch, as well as the clamping elements movably attached thereto.
- a clamping element in particular each clamping element which is provided in the hollow shaft, in the direction of increasing positive engagement and thus in particular in a downward direction relative to the usual working position against a restoring force be displaced.
- Such a restoring force may, for example, be exerted by a compression spring, in particular one which is supported on one side, in particular on the underside, on the tensioning element and on the other side, in particular on the top of the annular area mentioned at the outset.
- a compression spring surround a bolt also mentioned above.
- Such a restoring force can also be generated by a compression spring whose one end is supported directly or indirectly via a ring on an inner shoulder of the hollow shaft adjacent to the particular frusto-conical outer surface and whose other end is supported directly or indirectly via a ring on a radial projecting upper portion of a clamping element, in particular supported from below.
- the movement of the clamping elements in the direction of increasing positive locking against a restoring force has the advantage that the clamping element can be pressed by this restoring force in the axial direction to a realized on a drill string shoulder or step.
- this causes that at the moment when the drill string a clamping element relieves this clamping element is pushed out by the restoring force from the positive connection between the guide surfaces, that is pressed, for example, based on the usual working position upwards.
- the drill string is released from the clamping elements.
- Such a relief between the drill pipe and the clamping element can be achieved, for example, when a drill pipe is placed after lifting by means of such a clamping head according to the invention on the ground and the clamping head moves relative to the drill string away from the shoulder of the drill string down in the axial direction of the drill string ,
- the removal of the clamping elements in the radial direction from a drill pipe to the outside can be further supported in a development that the clamping elements, in particular at its upper end radially inwardly lying, in particular downwardly tapered truncated cone-shaped contact surfaces, by means of which in an operative connection arranged in the hollow shaft corresponding contact surfaces, a clamping element in an upward movement is radially outwardly displaceable, in particular when the respective clamping element moves axially upwards and thereby the respective contact surfaces come into operative connection.
- the corresponding abutment surfaces arranged in the hollow shaft can be e.g. be formed by an outer lower frustoconical, in particular downwardly tapering portion of a coaxially mounted in the hollow shaft in the upper region of the tube.
- This tube may e.g. be attached by an attached ring or collar or webs on the hollow shaft, in particular at its inner upper portion.
- such a pressure spring is arranged directly between the actuating element and the clamping element or, in a particularly preferred embodiment, that such a compression spring is arranged between an actuating element and an intermediate element, e.g. an intermediate ring is arranged, which lies between the actuating element and the clamping element.
- all clamping elements can be contacted simultaneously via such an intermediate ring.
- spring elements can be arranged between the mutually facing annular surfaces of the intermediate ring and the actuating element, for example preferably at the positions at which the aforementioned bolts can extend from the actuating element through the intermediate ring and the clamping elements.
- each of these springs can surround a bolt.
- Such an embodiment according to the invention has the particular advantage that in the first drive alternative, a sleeve in the axial direction is movable relative to the hollow shaft, wherein initially by the indirect action of the actuating element on the compression springs, the clamping elements are movable into a positive connection with a drill string, said after Achieving this positive connection between the actuating element and clamping elements or actuator and intermediate ring an axial range of motion remains.
- This axial movement range results here essentially by the fact that the compression springs are not fully compressed when the positive locking is reached. Accordingly, there remains an axial range of motion which is given by the compression of the compression springs obtained in positive engagement up to the maximum possible compression of the compression springs, for example when their turns abut one another or a separate stop is provided.
- the design of the clamping head according to the invention can thus be such that due to this remaining range of motion even with existing positive connection between the clamping elements and the drill pipe, the outer sleeve in this given Movement range can be moved in the axial direction until an effective connection between the clamping jaws of the first clamping device and the drill pipe is formed. This conclusion can be given for example by a force and / or shape and / or frictional engagement between the jaws of the first clamping device and the drill pipe.
- a particular perforated ring member is arranged which receives in its inner free diameter, the hollow shaft and which with an upstanding collar the Encompasses end area. This achieves a stabilization of the sleeve, which otherwise tends to spread when applying the compressive forces on the jaws. This spreading can be prevented by the stabilizing ring element.
- the clamping jaws of the first clamping mechanism for example, have a surface design of cooperating with a drill string surface, which produce a good operative conclusion.
- the surface may have a structuring and / or preferably a coating which acts as a friction lining.
- Such a coating may, for example, have the effect of improving particles such as sand, diamonds etc .. So the force can be introduced over a large area in the drill pipe, whereby local damage fails.
- the clamping head lowers relative to the drill string, whereby the positive connection between the drill string or the shoulder and the clamping elements is repealed and the clamping elements the spring load to be moved in the axial direction upwards and thus release the drill pipe.
- the separate drive is to be actuated in order to produce or release the positive locking of the clamping elements.
- the device according to the invention it is preferably provided in both drive alternatives to arrange the second clamping mechanism relative to a usual working position of the clamping head above said first clamping mechanism. It is also possible to reverse this arrangement.
- FIG. 1 shows a sectional view through a clamping head according to the invention of the first drive alternative
- FIG. 2 shows a detail view with the spring arrangement according to FIG. 1
- Figure 3 is a perspective view of a clamping head of the second
- Figure 4 is a sectional view of the clamping head of Figure 3
- Figure 5 is a representation of a clamping element Figure 6, the sole representation of the hollow shaft Figure 7, the sole representation of the sleeve Figure 8, the sole representation of a clamping jaw of the first
- FIG. 1 shows a side sectional view of a clamping head according to the invention of the type generally described in the first drive alternatives. Visible here is a hollow shaft 3, on the coaxial and axially movable sleeve 1 is arranged, the lower end portion widens conically in the present embodiment down.
- radial recesses 3d are provided in the vicinity of the lower end, pass through the clamping jaws 2 in the radial direction, which can enter into an operative conclusion with their inner surfaces 2a a form fit, force or frictional engagement with a drill string 9, if this Clamping jaws 2 are radially displaced maximally inwards.
- the areas 2a may be e.g. have a toothed surface.
- the clamping jaws 2 have radially outer contact surfaces 2b, which are formed corresponding to the inner conical surface 1b of the lower end portion of the sleeve.
- the adjustment of the corresponding surface areas may be such that they enter into a maximum positive fit, although the effective connection between the radially inner surfaces 2a and the drill string is given, so substantially the sleeve 1 is also shifted maximum down.
- a second clamping mechanism can also be seen in the interior of the hollow shaft above the clamping jaws 2, which for example comprises a plurality of, in particular four, clamping elements 4 which are arranged coaxially to the center axis 10 of the drill pipe 9 or the hollow shaft 3 and have radially inwardly lying contact surfaces 4b , which are designed to be positively applied to the drill pipe 9 and its shoulder 9a.
- the drill string 9 tapers from top to bottom, in this case conical / conical.
- the clamping elements 4 further have radially outer guide surfaces 4a, which are arranged at an acute angle to the center axis relative to this sectional view and which are further formed corresponding to guide surfaces 3a in the interior of the hollow shaft 3.
- These guide surfaces 3a inside the hollow shaft 3 can here be formed in the form of an annular region 3b which extends radially inward from the Hohlwellenwandung the hollow shaft 3 and having a coaxial to the center axis recess which is frusto-conical and tapers towards the bottom.
- the corresponding guide surfaces 4a and 3a on the clamping elements and the annular portion 3b of the hollow shaft 3 are adapted to each other that at the maximum fit shown here between the clamping elements 4 and the drill string 9 and a best fit between the radially outer guide surfaces 4a of the clamping elements and the inner frusto-conical surface portion 3a of the annular region 3b results.
- the clamping elements 4 have in their upper region a projection 4c pointing radially outwards, through which guide pins 6 pass. Through these guide pins, the clamping elements are guided in the axial direction and held their position, further provided in said radial projections 4c of the clamping elements 4 here in the radial direction slots are provided so that in an axial movement of the clamping elements 4 from top to bottom and the Guide between the surfaces 3a and 4a at the same time the clamping elements 4 can be moved radially inward in the game of said slots.
- an actuating element 5 is provided as a driver for the clamping elements 4, which is formed substantially annular and surrounds the drill string 9 and which is connected by webs through recesses 3 c with the outer sleeve 1.
- an intermediate ring 5a is further arranged here, which simultaneously contacts all the clamping elements 4 from above.
- a so-called closing compression spring 8 is arranged, which is provided to indirectly transmit the movement of the actuating element 5 with the sleeve 1 via the spring 8 to the intermediate ring 5a and thus to the clamping elements 4.
- the clamping elements 4 are pressed by the spring forces acting through the compression springs 8 in the axial direction down in the direction of increasing positive engagement, but not by the forces on the sleeve, for example with a hydraulic drive device or with the sleeve on the jaws. 2 be exercised. It can also be seen here, in particular from FIG.
- This gap 10 provides a range of motion, in which the sleeve 1, even if maximum positive engagement between the clamping elements 4 and the drill string 9 is achieved, can be moved even further down, so the jaws 2 with maximum force on the drill string 9 to press. It thus causes first the drill string 9 is fixed in the axial direction due to the achieved fit between the shoulder 9a and the Clamping elements 4 and the further also by the operative connection between the clamping jaws 2 and the drill pipe 9, a torque can be transmitted to this by a rotation of the hollow shaft 3. Thus, when lifting the drill string 9 this can also be rotated at the same time, which simplifies the lifting process.
- FIGS 3 and 4 show a clamping head according to the invention of the second alternative, in which separate actuators, here hydraulic cylinder-piston units are used for actuating the first and second clamping mechanism.
- separate actuators here hydraulic cylinder-piston units are used for actuating the first and second clamping mechanism.
- the sleeve 1 has, above the widening region 1b, two spaced-apart collars 1c and 1d, of which the collar 1c is integral with the sleeve 1 and the collar 1d is formed by a ring which can be screwed onto the sleeve. Both collars enclose bearings 11a and 11b, bearing a downward force (thrust) with bearings 11a and an upward force (traction) with bearing 11b on the sleeve. This force is introduced by means of a surrounding the sleeve 1 ring member 12 through the bearings in the sleeve.
- the first drive is hereby constituted by the cylinder-piston assemblies 13 which are mounted on the ring member 12 e.g. are attached to the piston rod and have a uniform Wtnkelverotti around the ring member around.
- the second drive also comprises cylinder-piston assemblies 14 with uniform angular distribution around the chuck, which introduce the force generated on ball and / or roller bearings 15 on a running surface 16a of a pressure ring 16, by the not shown here recesses 17 in the hollow shaft. 3 is connected by webs with an annular actuating element 5, so that the movement of the pressure ring 16 is transmitted to the interior of the hollow shaft 3.
- the actuating element 5 acts directly from above on the clamping elements 4, in particular on the upper radially outwardly projecting edge 4c.
- the Clamping element 4 used here is shown in detail in FIG. 5 with the reference numerals corresponding to FIGS. 1 and 2.
- a clamping element 4 nor a stop surface 4d at the inner upper portion which has the shape of a portion of a truncated cone and cooperates here with corresponding stop surfaces 17a at the frusto-conical lower end of a tube 17 that coaxially in the Hollow shaft 3 is attached via the ring member 17b and a drill string 9 surrounds.
- FIG. 4 also shows a compression spring mechanism 18 for applying force to the clamping element 4 in the opening direction.
- a spring is inserted between two rings, wherein the lower ring rests against an inner shoulder above the frusto-conical inner lateral surface 3a of the hollow shaft 3 and the upper ring at the bottom of the projecting portion 4c of a clamping element.
- the spring mechanism is shown for the sake of clarity in the compressed position, but the clamping elements 4 in the pushed-up position.
- FIGS. 3 and 4 furthermore show that a flange 3e is arranged on top of the hollow shaft 3, which flange can be connected by means of a clamping ring 19 to the corresponding flange 20 of a rotary drive in order to rotate the hollow shaft 3 and sleeve 1 with respect to a carrier element, not shown here. on which both drives 13 and 14 are attached.
- a funnel-shaped insertion piece 21 to facilitate the insertion of the drill string 9.
- This insertion piece 21 may be removably disposed below in the hollow shaft 3.
- a stabilizing ring 22 is arranged, which surrounds the sleeve with its upstanding outer collar below and thus prevents spreading of the sleeve 1 under load.
- FIGS. 6 and 7 show the hollow shaft 3 and the sleeve 1 as separate components.
- Figure 7 can be seen in the sleeve 1 that these in the preferred embodiment here Groove 23 in the inner frusto-conical lateral surface 1b which extend from top to bottom and have a uniform angular pitch.
- the grooves 23 have plane groove bases into which the guide elements 24 according to FIGS. 9 and 10 can be inserted.
- These guide elements 24 have the shape of a U-profile with a planar inner base 24a and profile legs 24b which protrude inwardly at the outer region with a step, so that the guide element 24 forms an undercut groove.
- the height of the guide elements 24 can decrease in relation to the subsequent positioning in a groove 23 ach upwards.
- the guide element 24 forms a rail guide for a respective clamping jaw 2 of the first clamping mechanism, which has on its two sides in each case a groove 2c, which runs parallel to the surface thereof near the contact surface 2b which is planned here.
- the groove 2c In the groove 2c, the non-undercut portion 24c of each profile leg 24b of a guide element 24 eino, whereby the clamping jaw 2 is guided in the sleeve safely.
- the plane contact surface 2b bears against the planar inner base 24a, in particular so that large forces can be transmitted.
Landscapes
- 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)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102008012729A DE102008012729A1 (en) | 2008-03-05 | 2008-03-05 | Clamping head for an earth boring machine |
PCT/EP2009/001414 WO2009109336A1 (en) | 2008-03-05 | 2009-02-27 | Clamping head for an earth-drilling system |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2252763A1 true EP2252763A1 (en) | 2010-11-24 |
EP2252763B1 EP2252763B1 (en) | 2012-01-04 |
Family
ID=40765509
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP09716504A Not-in-force EP2252763B1 (en) | 2008-03-05 | 2009-02-27 | Clamping head for an earth-drilling system |
Country Status (6)
Country | Link |
---|---|
US (1) | US20110260480A1 (en) |
EP (1) | EP2252763B1 (en) |
CN (1) | CN101978131A (en) |
AT (1) | ATE540193T1 (en) |
DE (1) | DE102008012729A1 (en) |
WO (1) | WO2009109336A1 (en) |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102008021491A1 (en) * | 2008-04-29 | 2009-11-05 | Dietmar Scheider | Clamping head for an earth boring machine |
CN102134974B (en) * | 2011-04-02 | 2013-02-27 | 建湖县鸿达阀门管件有限公司 | Drill stem hoisting device |
DE102011122143A1 (en) | 2011-12-22 | 2013-06-27 | Dietmar Scheider | Clamping head used in earth oil well drilling installation used in construction site, has drill rod guided with hollow shaft, which is rotatably connected with drilling shaft of drive head |
US10597980B2 (en) * | 2013-12-21 | 2020-03-24 | Michael Hernandez | External trap apparatus and method for safely controlling tool string assemblies |
US9334706B2 (en) * | 2014-01-15 | 2016-05-10 | C. Allen Phillips | Top drive pipe spinner |
CN104612617A (en) * | 2015-01-22 | 2015-05-13 | 中交二航局第三工程有限公司 | Broken drill pipe salvage device inside pile foundation hole |
CN107891113B (en) * | 2017-12-18 | 2024-04-19 | 淮北恒远工程建材设备有限责任公司 | Welding-free triangular arc rib integrated drill rod clamping device and processing method thereof |
CN112383199B (en) * | 2020-10-31 | 2024-04-05 | 重庆青山工业有限责任公司 | Grabbing device for motor stator assembly |
CN113638704A (en) * | 2021-10-13 | 2021-11-12 | 北京恒利新源地热能科技有限公司 | Drill rod locking device of top drive type geothermal drilling machine |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3722603A (en) * | 1971-09-16 | 1973-03-27 | Brown Oil Tools | Well drilling apparatus |
US3915244A (en) * | 1974-06-06 | 1975-10-28 | Cicero C Brown | Break out elevators for rotary drive assemblies |
DE3718636C1 (en) * | 1987-06-04 | 1988-07-21 | Turmag Turbo Masch Ag | Rock drilling machine, in particular for underground mining, with a projecting, freely visible threaded pin for the positive reception of boring bars |
DE4015300C1 (en) * | 1990-05-12 | 1992-01-30 | Prakla-Seismos Ag, 3000 Hannover, De | Drill stem clamping system - incorporates hydraulic actuator and flange seated in roller bearing |
US5297833A (en) * | 1992-11-12 | 1994-03-29 | W-N Apache Corporation | Apparatus for gripping a down hole tubular for support and rotation |
US7191840B2 (en) * | 2003-03-05 | 2007-03-20 | Weatherford/Lamb, Inc. | Casing running and drilling system |
GB0116563D0 (en) * | 2001-07-06 | 2001-08-29 | Coupler Developments Ltd | Improved drilling method & apparatus |
-
2008
- 2008-03-05 DE DE102008012729A patent/DE102008012729A1/en not_active Withdrawn
-
2009
- 2009-02-27 CN CN2009801077347A patent/CN101978131A/en active Pending
- 2009-02-27 EP EP09716504A patent/EP2252763B1/en not_active Not-in-force
- 2009-02-27 US US12/918,234 patent/US20110260480A1/en not_active Abandoned
- 2009-02-27 WO PCT/EP2009/001414 patent/WO2009109336A1/en active Application Filing
- 2009-02-27 AT AT09716504T patent/ATE540193T1/en active
Non-Patent Citations (1)
Title |
---|
See references of WO2009109336A1 * |
Also Published As
Publication number | Publication date |
---|---|
WO2009109336A1 (en) | 2009-09-11 |
EP2252763B1 (en) | 2012-01-04 |
ATE540193T1 (en) | 2012-01-15 |
US20110260480A1 (en) | 2011-10-27 |
CN101978131A (en) | 2011-02-16 |
DE102008012729A1 (en) | 2009-09-10 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
EP2252763B1 (en) | Clamping head for an earth-drilling system | |
EP2715188B1 (en) | spindle drive | |
WO2009132831A2 (en) | Grip head for an earth boring unit | |
EP2558230A1 (en) | Expansion head for expansion tools and expansion tool comprising said expansion head | |
DE2310608A1 (en) | INNER JAW DRUM BRAKE | |
EP3662119B1 (en) | Formwork support, formwork arrangement and method of demoulding a formwork arrangement | |
DE202014002813U1 (en) | Temporary wall support | |
EP2995401B1 (en) | Clamping device | |
EP1171260A1 (en) | Device for fracture-separating a workpiece | |
EP2878844A2 (en) | Disc brake | |
DE2112651A1 (en) | Machine tool | |
EP4039912B1 (en) | Displacement device | |
WO2016062515A1 (en) | Pressing tool | |
EP3762622B1 (en) | Expansion anchor comprising additional expansion body | |
DE102018100776A1 (en) | Lifting system, overhead conveyor with a lifting system and production and / or assembly system with a monorail conveyor | |
DE102012103424B4 (en) | Carrying device for lifting and lowering loads | |
DE102018212422A1 (en) | Magnetic formwork device | |
DE1752698C3 (en) | Device for the longitudinal advance of a slender pressure generating ram to be secured against buckling for hydrostatic extrusion or the like. Machine element or workpiece | |
DE102011122143A1 (en) | Clamping head used in earth oil well drilling installation used in construction site, has drill rod guided with hollow shaft, which is rotatably connected with drilling shaft of drive head | |
DE470016C (en) | Automatic adjustment device for brakes on railroad cars and. like | |
DE102014013868B4 (en) | Actuation device for an internal shoe brake with automatic adjustment device | |
EP2799189B1 (en) | Arrest mechanism for a telescopic handle | |
DE2633022B1 (en) | Crane jib telescoping drive - has nuts on screwed spindle locked in turn to respective jib sections | |
WO2011151790A2 (en) | Manually actuatable toggle press having a large working stroke | |
DE2738046A1 (en) | LANE CHANGING WHEEL SET FOR RAIL VEHICLES |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
17P | Request for examination filed |
Effective date: 20100821 |
|
AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO SE SI SK TR |
|
AX | Request for extension of the european patent |
Extension state: AL BA RS |
|
DAX | Request for extension of the european patent (deleted) | ||
GRAP | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOSNIGR1 |
|
GRAS | Grant fee paid |
Free format text: ORIGINAL CODE: EPIDOSNIGR3 |
|
GRAA | (expected) grant |
Free format text: ORIGINAL CODE: 0009210 |
|
AK | Designated contracting states |
Kind code of ref document: B1 Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO SE SI SK TR |
|
REG | Reference to a national code |
Ref country code: GB Ref legal event code: FG4D Free format text: NOT ENGLISH |
|
REG | Reference to a national code |
Ref country code: CH Ref legal event code: EP |
|
REG | Reference to a national code |
Ref country code: AT Ref legal event code: REF Ref document number: 540193 Country of ref document: AT Kind code of ref document: T Effective date: 20120115 |
|
REG | Reference to a national code |
Ref country code: IE Ref legal event code: FG4D |
|
REG | Reference to a national code |
Ref country code: DE Ref legal event code: R096 Ref document number: 502009002381 Country of ref document: DE Effective date: 20120308 |
|
REG | Reference to a national code |
Ref country code: NL Ref legal event code: VDEP Effective date: 20120104 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: SI Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20120104 |
|
LTIE | Lt: invalidation of european patent or patent extension |
Effective date: 20120104 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: BG Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20120404 Ref country code: NO Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20120404 Ref country code: NL Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20120104 Ref country code: IS Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20120504 Ref country code: HR Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20120104 Ref country code: LT Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20120104 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: DE Payment date: 20120403 Year of fee payment: 4 |
|
REG | Reference to a national code |
Ref country code: IE Ref legal event code: FD4D |
|
BERE | Be: lapsed |
Owner name: SCHEIDER, DIETMAR Effective date: 20120228 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: FI Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20120104 Ref country code: PL Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20120104 Ref country code: GR Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20120405 Ref country code: PT Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20120504 Ref country code: LV Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20120104 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: CY Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20120104 Ref country code: MC Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20120229 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: DK Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20120104 Ref country code: RO Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20120104 Ref country code: EE Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20120104 Ref country code: CZ Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20120104 Ref country code: IE Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20120104 Ref country code: SE Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20120104 |
|
PLBE | No opposition filed within time limit |
Free format text: ORIGINAL CODE: 0009261 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT |
|
REG | Reference to a national code |
Ref country code: FR Ref legal event code: ST Effective date: 20121031 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: SK Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20120104 Ref country code: IT Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20120104 |
|
26N | No opposition filed |
Effective date: 20121005 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: BE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20120228 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: FR Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20120305 |
|
REG | Reference to a national code |
Ref country code: DE Ref legal event code: R097 Ref document number: 502009002381 Country of ref document: DE Effective date: 20121005 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: MK Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20120104 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: ES Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20120415 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: MT Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20120104 |
|
REG | Reference to a national code |
Ref country code: CH Ref legal event code: PL |
|
GBPC | Gb: european patent ceased through non-payment of renewal fee |
Effective date: 20130227 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: LI Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20130228 Ref country code: CH Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20130228 Ref country code: DE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20130903 |
|
REG | Reference to a national code |
Ref country code: DE Ref legal event code: R119 Ref document number: 502009002381 Country of ref document: DE Effective date: 20130903 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: GB Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20130227 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: TR Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20120104 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: LU Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20120227 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: HU Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20090227 |
|
REG | Reference to a national code |
Ref country code: AT Ref legal event code: MM01 Ref document number: 540193 Country of ref document: AT Kind code of ref document: T Effective date: 20140227 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: AT Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20140227 |