EP2093373A1 - Drilling device, in particular for producing blast holes in the bed of a body of water and method for inserting an explosive charge into the bed of a body of water - Google Patents

Abstract

The device has a working platform (13) fixed at a floating body (10) e.g. floating pontoon. A drilling mast (30) is arranged at the platform. A drilling drive (31) e.g. percussion drive, for drilling rods is mounted at the mast in longitudinal displaced manner. A guide girder (40) e.g. lattice girder, extends in a region beneath the mast and includes a spot drilling guide (41) for the rods beneath the mast. The girder with the spot drilling guide is displaced relative to the mast and the platform in a longitudinal direction of the mast, and is positioned independent of the drilling drive. An independent claim is also included for a method for inserting an explosive charge into the bed of a water body.

Description

The invention relates to a drilling apparatus, in particular for introducing a hole at the bottom of a body of water, for example for introducing a blasting hole, according to the preamble of claim 1. Such a drilling apparatus is formed with a working platform, which is attachable to a float, a drilling mast, which the work platform is arranged, and at least one drill drive for a drill string, which is mounted longitudinally displaceable on the drilling mast.

In the case of compact geologies or of rock, harbor or channel depressions are often carried out in such a way that rock material is released by blasting in the harbor bottom and the thus dissolved rock is then dredged out. For the introduction of explosive charges blasting holes in the harbor bottom are required. To produce a blast hole, a drill string is inserted into the harbor floor. After the extraction of the drill string a hole is present in the harbor bottom, in which the explosives can be installed in the required amount.

A generic drilling device for creating such blast holes in a seabed is from the EP 1 640 557 A1 known. The drilling drives of the drilling rig of the EP 1 640 557 A1 are arranged above the water level. This makes it necessary to first pass through the entire depth of water with the drill pipe before the drill pipe can be placed on the ground. Care must be taken here that the drill pipe is placed flush with the drilling axis of the drilling drives arranged above the water surface at the bottom. The exact alignment is important to all-round bending movements of the drill string later To avoid drilling. Such bending movements could result in undesirable mechanical stresses in the linkage material which, under certain circumstances, can lead to premature wear of the linkage. In addition, the installation of the explosive charges may be difficult in non-aligned hole.

However, the required aligned placement of the drill string is often difficult because the body of water below the water surface is not visible.

For the production of blasting holes is after the EP 1 640 557 A1 first drilled with a full drill bit. Subsequently, the drill pipe is recovered and the full drill bit is replaced with a hollow core bit. Subsequently, the bore is adjusted again with this hollow drill pipe. When the final depth is reached, the explosive charges are installed through the hollow drill pipe to the lowest depth of the well. The drill string is then pulled out again along with the hollow core bit over the explosive charges. This two-time drilling with intervening tool change also requires a precisely positioned drilling in the alignment of the drilling axis.

If there is no stable material at the bottom of the river, it is often necessary to work with a protective pipe during drilling, which is drilled simultaneously with the drill pipe and only then cut off when it has reached a stable soil horizon. The final drilling depth is achieved by the Weiterabteufen extending inside the protective tube inner rod.

In the device of EP 1 640 557 A1 If a small thickness of the unstable layer is present, a heavy standpipe can be lowered by gravity without rotational movements by a winch device to the ground and parked there. The standpipe can then protect the well from nachfallendem material and cause centering of the drill pipe during drilling. Such a system comes with a single drill drive. However, the centering of drill pipe and standpipe in a particular case can be expensive.

If the unstable soil layers at the bottom of the water have a greater thickness, it is often necessary to drill the protective tube in the overlay drilling method in the soft soil layers. For this purpose, the protective tube and drill pipe are drilled mostly with a single drill drive. Also at However, such drilling rigs is usually to pay attention to a precisely aligned boring. For this purpose, it may be provided for the drill mast to be arranged displaceably along the drilling axis on the drilling ship, so that the drilling mast can be lowered into the water and into the area of the water bottom. In this way it can be avoided that the drill pipe laterally deflects during drilling. Once the protective tube is embedded in the ground, the drilling mast can be partially or completely lifted out of the water again.

In a device with adjustable drilling mast, however, it may be necessary to lower hydraulic components into the water, which may require costly corrosion protection measures due to the often corrosive action of seawater. Furthermore, due to the considerable weight of the mast comparatively strong and therefore expensive lifting devices are required. In addition, comparatively complex hydraulic line guides are required and load compensation systems must be provided for such winches which are firmly on the deck, but whose ropes are guided over the mast head which is variable in height. When overlay drilling with only a drill drive measures must also be provided for removing or repositioning the drill string to allow free access to the outer tube or to the borehole.

In order to avoid the latter removal or lengthening of the drill pipe, it is possible to work with separate drill drives for the inner drill pipe and for the outer pipe, that is to say the protective pipe. A corresponding drilling rig is for example from the EP 0 379 187 A1 known. According to this document, two auger drives are provided which can be decoupled from each other. Such a decoupling makes it possible to keep the protective tube and the hole for the loading of explosives at fully zurückgefahrenem upper drill drive for the drill pipe and recover after loading the protective tube with the lower drill drive again. This eliminates all previously described linkage changes and the bore can be introduced in one go. Although such a drilling rig with two auger drive carriages is very advantageous in terms of drilling performance, it can also be comparatively heavy and hydraulically complex, which would make the implementation of the above-described longitudinal displacement of the auger on the drill rig for the exact positioning of the bore even more complex.

Longitudinally adjustable drilling masts are also known for land-based drilling rigs. In particular, can be realized in such an arrangement telescopic masts, such as from the WO 2004/074626 A1 , the DE 198 09 773 A1 and the DE 102 24 906 A1 known. The telescopic masts allow a large Bohrhub with small transport dimensions, which is advantageous for example for underground use. As with the above-described underwater ground drilling method, in the telescopic masts the mast, together with the auger drive, is moved relative to the carrier vehicle, which requires relatively expensive lifting devices.

The object of the invention is to provide a drilling apparatus and a method with which holes at the bottom of a body of water can be made particularly precise and reliable with little effort.

The object is achieved by a drilling apparatus having the features of claim 1 and a method having the features of claim 13. Preferred embodiments of the device are indicated in the dependent claims.

A drilling apparatus according to the invention is characterized in that, in particular at the working platform, a guide support is provided which extends into an area below the drill mast and below the drill mast has a Anbohrführung for the drill string, and that the guide support with the Anbohrführung relative to the drill mast and the working platform is movable in the longitudinal direction of the drilling mast.

A first basic idea of the invention can be seen in the fact that in the support structure supporting the drilling mast, a downwardly slidable guide carrier with a drilling guide for guiding the drill pipe in the drilling axis is provided. The arrangement according to the invention makes it possible, if necessary, to provide a reliable guide for tapping in the area of the body of the river, without having to displace the heavy drilling mast together with the drive units arranged thereon and immersing it in the water. Consequently, no drive component and / or hydraulic component gets under the water level and premature corrosion of these components is effectively prevented. Compared with a solution in which the entire drilling mast is moved, according to the invention Moreover, the lifting drive only accomplishes the lifting movement of the comparatively light guide carrier, but not that of the entire derrick. As a result, the drive can be realized comparatively inexpensively. Due to the present invention fixed boom also the hydraulic control of the winches is much easier because the mast head can always remain positioned at the same height above deck. The tapping guide provides an efficient guide for the drill string and / or a protective tube during the tapping process and also during further drilling, which can be realized in a particularly simple and cost-effective manner.

The float may be, for example, a ship or a pontoon. The float may have means for supporting at the bottom of the water. For this purpose, for example, support columns may be provided, which can be lowered from the float to the harbor bottom. The float can be considered as part of the drilling device or as an independent element.

The drilling mast preferably runs at least approximately vertically, but may also be inclined for oblique drilling. For transport purposes, the drilling mast is expediently divided into production sections, which allows a particularly simple transport. Since, according to the invention, a vertical positioning of the drilling guide can be effected solely by movement of the guide carrier, the drilling mast can be provided immovably on the working platform in the vertical direction and / or the direction of the drilling axis.

In particular, the direction of the drilling axis, which expediently extends at least approximately vertically, can be understood as the longitudinal direction of the mast. It may be particularly advantageous that the guide support with the Anbohrführung exclusively in the longitudinal direction of the drill mast is movable, as this can be ensured that the Anbohrführung is always in the drilling axis. However, it can also be provided that the guide carrier executes a superimposed movement transversely to the drilling mast during the process in the longitudinal direction, so that in the sum of the motion components a movement is given obliquely to the drilling mast. It can also be provided that the guide carrier is independently movable both in the longitudinal direction and transversely to the mast. In such an arrangement, the tapping guide can be temporarily moved out of the drilling axis, if, for example, no linkage guidance on the tapping guide is desired at times. To this Purpose may also be provided that the Anbohrführung is movable relative to the guide carrier, in particular transversely to the longitudinal direction of the drilling mast and / or transverse to the drilling axis.

The auger drive may be, for example, a rotary and / or percussion drive, which serves to keep the drill string coaxial with the drilling axis and to introduce it into the ground along the drilling axis.

The working platform is expediently arranged on the floating body, that is to say on its upper side. Thus, the Anbohrführung can be brought close to the river bottom, the guide carrier preferably extends under the float, at least under the platform. The guide carrier may, for example, have a longitudinal member extending in the longitudinal direction of the drilling mast. On this side member, in particular at its end, in turn, preferably rectangular, a transverse cross member may be provided, which carries the Anbohrführung. The tapping guide may be, for example, a guide sleeve, but individual guide surfaces may be sufficient.

It is particularly advantageous according to the invention that the tapping guide can be introduced by moving the guide carrier into a region arranged below a water level, that is to say in particular in a region arranged below the waterline of the floating body. As a result, the tapping guide can be arranged particularly close to the drilling point and thus a particularly effective linkage guidance can be achieved. For example, with regard to maintenance, it is expedient that the tapping guide by moving the guide carrier upwards in an area above the water level and / or the waterline is displaced, where the tapping guide is particularly accessible.

Furthermore, it is particularly expedient that the drilling mast is arranged above the water level and / or the waterline. As a result, excessive corrosion of arranged on the drilling mast drive devices is avoided.

It is also advantageous that the guide carrier is designed as a lattice girder, whereby it can be made very light and stiff at the same time. In principle, however, a pipe support or a solid support is conceivable.

A further embodiment of the invention is that, in particular on the work platform, a support frame is provided, which expediently extends from the working platform upwards. For example, drive units of the drilling device can be provided on the support frame. In particular, a guide carrier drive for moving the guide carrier can be arranged on the support frame. The shoring is expediently arranged firmly on the work platform.

If a support frame is provided, it is advantageous that the drilling mast is formed on the support frame. In particular, the drilling mast and the supporting framework can be integrally formed, that is to say in particular that the drilling mast and the supporting framework can have common parts. Drilling mast and shoring can also be designed as separate parts. It is advantageous that the drilling mast is connected to the stiffening of the drilling mast with the support frame. As a result, a particularly reliable drilling operation is possible with low weight. For bracing the drill mast is suitably connected several times at different heights with the support frame. Preferably, the drill mast projects beyond the support frame and has at its upper end a mast head with cable deflection.

If a support frame is provided, it is furthermore particularly advantageous that the guide support runs at least in regions within the support frame. In such an arrangement, the support framework can serve in a structurally particularly simple manner for holding and / or lifting and for einhausen of the guide carrier. Preferably, the guide carrier is guided on the support frame.

Furthermore, it is according to the invention that a guide carrier drive is provided for the longitudinal process of the guide carrier. Hereby, the tapping guide can be reliably positioned. The guide carrier drive is expediently designed as an independent drive system, that is to say that with it the guide carrier can be positioned independently of the drill mast and / or the drill drive. The guide carrier drive advantageously has at least one drive winch, which is expediently arranged on the support frame. A structurally particularly simple drilling device is given by the fact that the guide carrier drive has at least one drive cable, which is arranged on the guide carrier. The drive cable expediently extends at least in sections within the support frame and / or is deflected on the support frame, for which purpose a corresponding deflection roller is provided on the support frame can be. For a particularly simple construction, the guide carrier drive can be designed as a hoist winch drive. In such a drive, the lowering takes place by gravity. Alternatively, a cable feed drive with sheared ropes can be provided as a guide carrier drive. In such a cable feed drive, a drive cable is arranged both for lifting and for lowering the guide carrier. By means of such a system, unlike a pure hoist winch, a downward force can also be generated on the guide carrier. Under a drive cable can be understood according to the invention, for example, a drive chain.

Alternatively, other linear feed systems are possible as a guide carrier drive, such as hydraulic cylinder drives, rack drives or bolt bar drives, possibly with rack and pinion. The guide carrier drive is expediently designed so that the guide carrier is infinitely adjustable.

The reliability in the operation can be further increased by providing a stake-out device for locking the guide carrier. In this way it can be ensured that the guide carrier is reliably fixed even in the event of a failure of the guide carrier drive. The staking device preferably has at least one bolt arranged on the working platform or on the guide carrier, which can be inserted into corresponding recesses of the guide carrier or the working platform. The stakeout is expediently provided on the support frame and / or on a guide of the guide support.

It is particularly advantageous that an adjusting device is provided, with which the working platform, in particular together with the drilling mast and the guide carrier, is adjustable relative to the floating body. The adjustability of the platform allows abzutun several holes next to each other, without having to move the float and this anchorages to solve the float. Conveniently, the work platform is adjustable in at least two, preferably mutually perpendicular spatial directions relative to the floating body. An adjustability can be given in particular in the horizontal, that is transverse to the course of the drilling mast and / or the drilling axis.

The adjusting device according to the invention has an intermediate stage which is provided between the working platform and the floating body. The intermediate stage is expediently displaceable relative to the floating body in a first spatial direction and the working platform in turn displaceable relative to the intermediate stage in a second spatial direction. The adjusting device preferably has roller bearings arranged on the working platform and / or on the intermediate platform in order to ensure these relative movements.

According to the invention, the drilling mast, shoring and preferably also at least one hydraulic power pack are arranged on the working platform. When moving the work platform relative to the float thus drilling mast, shoring and hydraulic power pack are not relatively moved against each other, resulting in a particularly cost-effective arrangement.

A structurally particularly simple construction is given by the fact that the drilling mast and / or the supporting framework stand up on the working platform and / or the floating body. According to this embodiment, the drilling mast and / or the scaffold extends from the working platform upwards. Furthermore, it is advantageous that the guide support passes through the work platform. In this way, a particularly simple guidance of the guide carrier can be realized.

For a particularly reliable method of the guide carrier, it is advantageous that the working platform has a guide for the guide carrier. Furthermore, it is advantageous that a further guide for the guide carrier is provided on the support frame and / or on the drilling mast. A guide can also be provided on the float. At least one of the guides is expediently designed sleeve-shaped. The guidance provided on the work platform is preferably arranged below the guide provided on the drilling mast and / or on the support frame. If a staking device is provided, this is expediently arranged on a guide, in particular the lower guide.

To keep lateral forces from the drill pipe, it is also advantageous that the platform has a guide for the drill string. This can also be given by a guide sleeve. According to this embodiment, the drill pipe is guided both on the guide of the working platform and on the adjustable Anbohrführung lying below.

The drill string can be a single rod, but preferably also a double rod with an outer rod and an inner rod extending therein. The outer rod can also be referred to as a protective tube. In particular, for the operation of a double linkage, it is advantageous that a second drill drive is provided for the drill pipe, which is preferably mounted longitudinally displaceable on the drilling mast. In this case, the first drill drive to operate the outer linkage and the second drill drive to operate the inner linkage. The second drill drive for the inner rod is expediently arranged above the first drill drive for the outer rod. The drill drive for the outer linkage expediently has a hollow shaft with a sufficiently large diameter, so that the inner drill pipe can pass. This is particularly useful when the outer linkage or the inner linkage is drilled with a rotary impact. The first and / or the second auger drive may be a rotary and / or percussion drive, that is, the two auger drives may be designed to be purely rotating or rotationally impacting. Under certain circumstances, a pure shaking operation could be provided.

As far as two auger drives are provided, it is particularly advantageous that they are independently displaceable on the drilling mast. In this case, for example, after the drilling by means of the second drill drive, the inner rod first be pulled while the outer rod remains in the ground. Explosives can then be introduced into the borehole via the outer linkage. Subsequently, the outer rod can be pulled by moving the first drill drive.

For independently adjusting the auger drives, the first auger drive and the second auger drive suitably each have their own independent actuator which acts between the respective auger drive and the aerial platform.

It is particularly advantageous that the first drill drive and / or the second drill drive for displacement along the drill mast each have at least one actuator with at least one drive motor which is arranged on the respective drill drive. By arranging the drive motor on the drill drive, the drill mast can be designed as a pure steel construction that does not require moving parts such as a mast-integrated feed system. This will, especially in a pivotable or a degradable drilling mast, achieved a particularly high operational reliability. In this embodiment, the drive motor is located on the drill drive, in particular on an optionally present carriage of the drill drive.

The actuator of the first and / or second drilling drive is expediently designed as a rotary drive. It is particularly advantageous that the actuator of the first and / or the second drill drive has at least one drive wheel which engages positively in corresponding recesses on the drill mast. In particular, the actuator can thus be designed as a pinion rack drive, as a pin chain drive or as a bolt strip drive. Such drives are particularly advantageous when a rope drive due to the large mast length a large rope elongation or even a cable break would be feared.

The actuator of the first and / or second drilling drive can also be designed as a winch drive, wherein preferably each drill drive is associated with its own winch. Conveniently, the actuator of the first and / or second drill drive is designed so that it allows a free upward movement of the respective drill drive. This can be realized in a particularly simple manner by a winch drive with a winch cable with a free end, in which the respective drill drive is mounted. Such a system is particularly advantageous when the device is used on an unsupported ship or pontoon. If, in this case, the actuators form a rigid connection between the pontoon and the drill drives with the drill string, then shaft movements could possibly lead to damage to the drill string, if this is firmly clamped in the ground. On the other hand, if the actuators permit an upward movement of the drilling drives, then the drilling drives and the drill pipe arranged thereon can track the wave movement relative to the floating body and harmful loads on the drill pipe are avoided.

Conveniently, at least one clamping device is provided for breaking and / or joining the drill pipe. This clamping device is preferably arranged on the working platform. The clamping device suitably has at least one clamping tongs, which in particular can be rotatable about the drilling axis can. Preferably, the clamping device has at least two, in particular three clamping tongs one above the other along the drilling axis.

If a clamping device is provided, it is particularly advantageous that the clamping device, in particular transversely to the drill pipe and / or the drilling axis, is displaceable, so that in addition to the clamping device, a free space can be created in which the first drill drive and / or the second drill drive is retractable. The clamping device can be provided linearly displaceable or pivotable. In a movable or swinging out of the drilling axis clamping device drilling drives can be driven particularly far down, which can significantly facilitate the installation of explosive charges and also saves mast length. The clamping device can also be referred to as a clamping and breaking device.

The invention also relates to a method for introducing an explosive charge into the bottom of a body of water by means of a device according to the invention designed as a hollow rod drill string is introduced into the ground and then the explosive charge is installed by the hollow rod into the ground, in particular flushed.

Fig. 1 bis Fig. 3

Seitenansichten einer erfindungsgemäßen Bohrvorrichtung in verschiedenen Verfahrensstadien;

Fig. 4

eine Detailausschnittsansicht der Vorrichtung der Figuren 1 bis 3 im Bereich der Arbeitsbühne von der Seite;

Fig. 5

eine Querschnittsansicht der Vorrichtung der Fig. 4 mit Blickrichtung von oben bei einem Schnitt durch das Traggerüst;

Fig. 6

eine gebrochene Seitenansicht der Vorrichtung der Figuren 1 bis 5 beim Einbau von Sprengladungen;

Fig. 7

den Bohrantrieb für das Außenrohr der Vorrichtung der Figuren 1 bis 6 mit Vorschubantrieb in Seitenansicht;

Fig. 8

eine Unteransicht des Bohrantriebes aus Fig. 7; und

Fig. 9

eine Seitenansicht eines weiteren Ausführungsbeispiels einer erfindungsgemäßen Bohrvorrichtung.

The invention will be explained in more detail with reference to preferred embodiments, which are shown schematically in the figures. In the figures show:

Fig. 1 to Fig. 3

Side views of a drilling device according to the invention in different stages of the process;

Fig. 4

a detail view of the device of FIGS. 1 to 3 in the area of the platform from the side;

Fig. 5

a cross-sectional view of the device of Fig. 4 viewed from above in a section through the support frame;

Fig. 6

a broken side view of the device FIGS. 1 to 5 when installing explosive charges;

Fig. 7

the drill drive for the outer tube of the device FIGS. 1 to 6 with feed drive in side view;

Fig. 8

a bottom view of the drill drive Fig. 7 ; and

Fig. 9

a side view of another embodiment of a drilling device according to the invention.

An embodiment of a drilling device according to the invention is in Fig. 1 and in detail in Fig. 4 shown. The device has a trained as a ship or floating pontoon float 10, which dives to its waterline 100 in a body of water. The floating body 10 can be anchored to the bottom 99 at the bottom of the water by anchor means, not shown, and in particular be supported on the ground.

On the floating body 10, an intermediate stage 18 and, in turn, a working platform 13 is arranged. The platform 13 is over in the FIGS. 4 and 5 Named roller bearing 16 horizontally slidably mounted on the intermediate stage 18, wherein the displaceability in this case in the in the FIGS. 1 to 5 is given from left to right direction. The intermediate stage 18 is in turn in the FIGS. 4 and 5 Named roller bearing 19 horizontally slidably mounted on the floating body 10, wherein the displaceability in this case perpendicular to the first direction of displacement, namely in the in the FIGS. 1 and 4 perpendicular to the plane of the drawing and in the Fig. 5 is given from top to bottom direction. The intermediate stage 18 can thus also be referred to as a transverse table and the working platform 13 as a longitudinal table. Due to the double-sliding support of the working platform 13, it can be moved relative to the floating body 10 in two horizontal spatial directions. This makes it possible to bring down several holes from a ship's position. The intermediate stage 13 forms with the roller bearings 16 and 19 an adjusting device for the working platform.

From the working platform 13, a drilling mast 30 extends vertically upwards. Furthermore, extends from the platform 13, a lattice mast-like support frame 20 vertically upwards. As in particular in Fig. 1 and 4 shown, the drilling mast is attached to a plurality of superimposed attachment points 21 on the support frame 20. Thus, the slender, divided into production sections drilling mast 30 is stiffened by the support frame 20.

On drilling mast 30 two auger drives 31, 32 are provided independently longitudinally displaceable. For this purpose, the auger drives 31, 32 each have their own feed slide and a separate feed system, which is described below in connection with FIGS FIGS. 7 and 8 will be explained in detail.

In particular Fig. 4 The two drill drives 31, 32 serve for rotationally driving and axially driving a drill pipe 1, 2 designed as a double drill pipe with respect to the drill axis 5. The lower drill drive 31 is provided for operating the outer linkage 1 and the upper drill drive 32 for operating the inner linkage 2. The lower, first drill drive 31 has, as in Fig. 6 and 7 shown, a hollow shaft 78, via which the inner rod 2 is inserted into the outer rod 1. At the lower end of the inner rod 2, as in Fig. 6 shown, a drill bit 7 may be provided, and / or optionally, for example, a pneumatically operated Imlochhammer.

In drilling operation, the drill pipe 1, 2 projects through the work platform 13, which can also be referred to as a work platform or work table, and into the water. To guide the drill string 1, 2, in particular of the outer rod 1, a guide 15 designed as a guide sleeve guide 15 is provided on the working platform 13, in particular in the FIGS. 4 and 5 is recognizable.

The guide 15 located above the water surface is generally relatively far away from the bottom of the water during subsea drilling. In order nevertheless to achieve an exact placement of the drill string 1, 2 at the bottom of the water in the drilling axis 5, according to the invention also a Anbohrführung 41 for the drill pipe 1, 2, in particular for the outer rod 1, is provided. The tapping guide 41 is particularly in Fig. 1 recognizable. The Anbohrführung 41 and the guide 15 both cause a radial support of the drill string 1, 2nd

The tapping guide 41 is arranged on a guide carrier 40 designed as a lattice girder, which is guided vertically with respect to the drilling mast 30, the supporting frame 20, the floating body 10 and the working platform 13 displaceable on the working platform 13. The vertical displaceability of the guide carrier 40 with the tapping guide 41 makes it possible, on the one hand, always to position the tapping guide 41 in the vicinity of the body of the water, even in changing water depths. On the other hand, the slidable Anbohrführung 41, the drill pipe 1, 2 when lowering through the water accompany, so as to ensure that the drill string 1, 2 is located in the Anbohrführung 41 when the drill string 1, 2, the reason is reached. Fig. 1 shows the drilling rig with maximum lowered down drilling guide 41st

In particular Fig. 1 shows the guide support 40 extending along the drilling mast 30 longitudinal member 44 and the end thereon a perpendicular from the side member 44 projecting cross member 45, on which in turn the Anbohrführung 41 is provided. The guide carrier 40 is thus L-shaped.

In particular Fig. 4 The guide carrier 40 is guided twice on the hull 10, namely by a first guide 14 in the working platform 13 and a second guide 24 arranged above it on the support frame 20. The guide carrier 40 is guided at its upper end with its longitudinal member 44 within the support frame 20 Guides 14 and 24 are spaced apart and formed as sliding guides.

How the particular FIGS. 1 . 4 and 5 show is for vertical adjustment of the guide support 40, that is, for lifting and lowering, a guide carrier drive with a winch 60 is provided. This winch 60 outputs a drive cable 61 which is arranged on the guide carrier 40 at the end. As Fig. 1 shows the drive cable 61 of the winch 60 along the support frame 20 and is deflected around a deflection 62 around, which is provided in an upper region on the support frame 20. The winch 60 is disposed on the support frame 20. The drive cable 61 is fastened centrally to the upper end of the guide carrier 40, namely on the longitudinal member 44 of the guide carrier 40. A downward movement of the guide carrier 40 results from the gravity effect when the winch 60 is lowered.

On the lower guide 14 designed as a guide sleeve, a staking device 69 is provided with which the guide carrier 40 can be secured vertically to the working platform 13 and thus to the floating body 10.

How the particular FIGS. 1 . 4 and 5 Furthermore, an auxiliary winch 65, which outputs an auxiliary winch cable 66, is provided on the support frame 20. As Fig. 1 shows this auxiliary winch cable 66 along the support frame 20 and the drilling mast 30 to a mast head 38 of the drilling mast 30, where it is deflected at a deflection. The drilling mast 30 projects beyond the support frame 20 upwards.

The drilling mast 30 and the support frame 20 are mounted on the work platform 13. On this platform 13 are, as in the FIGS. 1 . 4 and 5 shown, also a hydraulic power pack 27 and a control cabin 29. For a good view, the drilling axis 5 between the control cabin 29 on the one hand and the drilling mast 30 with the support frame 20 on the other hand. The working platform 13 is flat on its upper side. For drilling mud, as shown, an air compressor 28 can be used. Alternatively or additionally, flushing pumps are also possible. The flushing is supplied to the drill string 1, 2 via a flushing head, not shown in the figures.

In addition, a clamping device 50 for releasing and connecting the inner linkage 2 and / or the outer linkage 1 is provided on the working platform 13. This clamping device 50 is in the FIGS. 4 and 5 shown in detail. It has three along the drilling axis 5 superimposed clamping pliers 51 for clamping the drill string 1, 2, which can also be designed to rotate a screw thread. The clamping device 50 is connected to all three clamping nippers 51 in the in FIGS. 4 and 5 shown arrow direction movable. This makes it possible to move the clamping device 50 for breaking or joining to the drilling axis 5 back. On the other hand, the clamping device 50 can thereby be moved away from the drilling axis 5, so that a free space is created in which, as in FIG Fig. 3 shown, the drill drive 31 can be inserted for a maximum drilling depth. To guide the clamping device 50 when moving a designed as a guide rail linear guide device 53 is provided.

The FIGS. 7 and 8 show in detail the actuator of the first drill drive 31 for longitudinal process along the drilling mast 30. The actuator of the second drill drive 32 is formed analogously. As the FIGS. 7 and 8 show two drive motors 70 designed as a hydraulic rotary motors are provided on the drill drive 31, at the output shaft in each case a drive wheel 71, 71 'is provided. The drive wheels 71, 71 ', which may have, for example, a rack and pinion, engage in recesses 73, which in two parallel bolt strips 74, 74' on the drill mast 30th are formed. Instead of a pin strip system, a rack and pinion system or a cable drive can be provided.

As Fig. 7 also shows, the drill drive 31 may be formed for the outer rod 1 with a hollow shaft 78 for passage of the inner rod 2. Furthermore, a striking mechanism with hollow passage, in particular with a hollow drilled percussion piston, may be provided. This makes it possible to drill the outer rod 1 turn-turning in the waterbody. For operation of the percussion piston, the drill drive 31 suitably has a hydraulic impact mechanism.

The Figures 2 and 3 show different process stages when creating a hole with a drilling device according to the invention. Fig. 2 shows the drilling device in the starting position, that is provided in the position for positioning for a new hole position. Here, the two auger drives 31 and 32 are moved with the outer linkage 1 or inner linkage 2 arranged thereon in the respective highest position. Also, the guide bracket 40 with the Anbohrführung 41 is in the highest position. In this configuration, the two stages 13, 18 can be safely moved or the entire float 10 can be moved. The clamping device 50 is moved back from the drilling axis 5.

Fig. 3 shows the auger drives 31, 32 in the respective lowest position, resulting in a fixed length of the drill string 1, 2 and given the depth of water, the maximum drilling depths for the outer rod 1 and the inner rod 2 in the water bottom. In the presentation of the Fig. 3 is the clamping device 50 on the linear guide device 53 out of the drilling axis 5 out method, so that the auger drives 31, 32 can descend as close to the platform 13. In the in Fig. 3 shown state, the tapping guide 41 is completely lowered.

Fig. 6 shows the situation when installing explosive charges. In this case, the upper drill drive 32 is moved with the attached thereto inner linkage 2 with drill bit 7 in the highest position upwards. The lower auger drive 31 is decoupled from the outer rod 1 and at least so far moved upward that when starting up the inner rod 2, the drill bit 7 or optionally provided here Imlochhammer must not be pulled through the hollow shaft 78 of the lower auger drive 31, if the diameter of the hollow shaft 78 is too small for that. The lower drill drive 31 thus remains above the drill bit 7 or possibly the Imlochhammer.

The formed as a protective tube outer rod 1, which is screwed into the ground and is in the water bottom, and the borehole are freely accessible in this configuration from the working platform 13 on the float 10, so that the explosive charges, as indicated by an arrow in Fig. 6 indicated, can be installed. After installation of the explosive charges, the two auger drives 31, 32 are lowered so far that the outer rod 1 can be attached to the lower auger drive 31 again. Subsequently, the two auger drives 31, 32 are again in the in Fig. 2 shown starting position for the next well drilled.

Another embodiment of a drilling device according to the invention is in Fig. 9 shown. Equal or similar elements are indicated in all figures with the same reference numerals. The embodiment of Fig. 9 differs from the embodiment of FIGS. 1 to 8 on the one hand by the fact that according to the embodiment of the Fig. 9 the drilling mast 30 is formed integrally with the support frame 20. Accordingly, the support frame 20, in which the guide support 40 is guided, at the same time forms the drill mast 30. The two drilling drives 31 ', 32' are located on sliding guides on the grid-shaped support frame 20.

Furthermore, the embodiment differs from the Fig. 9 from the embodiment of FIGS. 1 to 8 by the configuration of the actuators for longitudinal displacement of the auger drives 31 ', 32'. Corresponding Fig. 9 These actuators are designed as winch drives. For actuating the drill drive 31 'for the in Fig. 9 outer linkage 1, not shown, a winch 101 is provided with a rope 103, wherein the cable 103 has a free end, on which the drill drive 31 'is arranged. For actuating the drill drive 32 'for the in Fig. 9 inner linkage 2, not shown, a further winch 102 is provided with a cable 104, wherein the cable 104 also has a free end, on which the drill drive 32 'is arranged. The winches 101 and 102 are as well as the two other winches 60 and 65 arranged on the support frame 20. The ropes 103 and 104 extend from the winches 101 and 102 along the support frame 20 upwards, are deflected in the region of the mast head 38 at a deflection 105 and extend from the deflection 105 along the support frame 20 vertically down to the drilling drives 31 'and 32 '. The two Drill drives 31 'and 32' and in particular their slide thus each depend on its own hoist winch 101 and 102 and they can be raised by the mast. The draining is done by the weight of the auger drives 31 'and 32'. In the arrangement of Fig. 9 For example, in the presence of upward forces in the drill string 1, 2, the auger drives 31 'and 32' are free to slide upwardly, thus avoiding undesirable stresses in the event of wave motion.

Claims (13)

Drilling device, in particular for introducing a hole at the bottom of a body of water, with a working platform (13) which can be attached to a floating body (10), - A drilling mast (30) which is arranged on the working platform (13), and - at least one drill drive (31) for a drill string (1, 2), which is mounted longitudinally displaceable on the drill mast (30), characterized, - That a guide support (40) is provided which extends into an area below the drilling mast (30) and below the drilling mast (30) has a Anbohrführung (41) for the drill string (1, 2), and - That the guide support (40) with the Anbohrführung (41) relative to the drilling mast (30) and the working platform (13) in the longitudinal direction of the drilling mast (30) is movable. Drilling device according to claim 1,
characterized, - That the tapping guide (41) can be introduced by moving the guide support (40) in an arranged below a water level area, and - That the drilling mast (30) is arranged above the water level. Drilling device according to one of the preceding claims,
characterized,
that the guide carrier (40) is designed as a lattice girder. Drilling device according to one of the preceding claims,
characterized, that a support frame (20) is provided on the work platform (13), - That the guide support (40) extends at least partially within the support frame (20), and - That the drilling mast (30) on the support frame (20) is formed. Drilling device according to one of the preceding claims,
characterized, - that a guide carrier drive for longitudinal movement of the guide carrier (40) is provided, - That the guide carrier drive comprises at least one drive cable (61) which is arranged on the guide support (40), and - That a stake-out device (69) for locking the guide carrier (40) is provided. Drilling device according to one of the preceding claims,
characterized,
that an adjusting device is provided, by which the working platform (13) together with the drill mast (30) and the guide carrier (40) relative to the floating body (10) can be adjusted horizontally in two spatial directions. Drilling device according to one of the preceding claims,
characterized, - That the drilling mast (30) and / or the support frame (20) on the working platform (13) get up, and - That the guide support (40) through the working platform (13) passes through. Drilling device according to one of the preceding claims,
characterized, in that a guide (14) for the guide carrier (40) is provided on the work platform (13), - That on the support frame (20) and / or on the drilling mast (30) a guide (24) for the guide support (40) is provided, and - That the working platform (13) has a guide (15) for the drill string (1, 2). Drilling device according to one of the preceding claims,
characterized, - That a second drill drive (32) for the drill string (1, 2) is provided, which is mounted longitudinally displaceable on the drilling mast (30), and - That the two auger drives (31, 32) independently of one another on the drilling mast (30) are displaceable. Drilling device according to one of the preceding claims,
characterized, - that the first drill drive (31) and / or the second drill drive (32) for moving along the drilling mast (30) each having at least one actuator with at least one drive motor (70) which is arranged on the respective drill drive (31, 32), and - That the actuators each have at least one drive wheel (71) which engages positively in corresponding recesses (73) on the drilling mast (30). Drilling device according to one of claims 1 to 10,
characterized,
in that the first drill drive (31) and / or the second drill drive (32) for displacement along the drill mast (30) each have at least one actuator which is designed as a winch drive. Drilling device according to one of the preceding claims,
characterized, - That at least one clamping device (50) for breaking and / or joining the drill string (1, 2) is provided, and - That the clamping device (50) is displaceable transversely to the drilling axis (5), so that in addition to the clamping device (50), a free space can be created in which the drill drive (31) is retractable. Method for introducing an explosive charge into the bottom of a body of water, in which - By means of a device according to one of the preceding claims, designed as a hollow rod drill string (1, 2) is introduced into the ground and - Then the explosive charge is installed through the hollow rod in the ground.

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