EP2295646B1 - Drilling equipment and method - Google Patents

Description

The invention relates to a drilling apparatus with a drill for drilling within a casing pipe, wherein the drill has a support frame with a fixing device for fixing against the casing pipe and a drilling tool which is driven in rotation via a telescopic linkage by means of a drill drive, which is arranged on the support frame.

The invention further relates to a drilling method for creating a bore within a casing tube, wherein a support frame of a drilling device is fixed relative to the casing tube and a drilling tool is rotationally driven by means of a support frame arranged on the drill drive via a telescopic linkage, whereby soil material is removed within the casing tube.

Such a drilling device and such a drilling method are known from EP 1 154 078 B1 known. To create a bored pile in soft ground, a jacket tube is first pressed or screwed by means of a known insertion device. To remove the soil material within the casing tube, a drilling device with a support frame is placed by means of a crane device, which is clamped at the upper end of the casing tube. Via a telescopic Kelly linkage a box drill is lowered as a drilling tool on the crane device. The drilling tool of the drill is rotationally driven by the Kelly linkage by a drill drive which is located on the clamped support frame.

After the receiving space of the box drill is filled with removed soil material, the drilling tool is lifted by the crane device again, the support frame detached from the casing tube and the drill overall side of the casing pivoted, in which position the box drill is emptied. Subsequently, the drill is placed back on the casing pipe to continue drilling, the support frame clamped thereto and drained the drilling tool again.

After completion of the drilling, the drill is completely removed by means of the crane device and the resulting cavity within the jacket tube can be filled, for example, by introducing a reinforcement cage made of steel and a concrete mass to form a foundation pile.

This known drilling method is overall very economical because after completion of the drilling, the drill can be moved over the crane device to the next jacket tube, so that immediately after the next drilling can be started. By the rope suspension of the drill on a crane device so to speak, a "flying drill" is created, which can be moved quickly and efficiently on the crane device, especially in difficult terrain.

In adverse weather conditions, especially in strong winds, the placement of the drill on the casing and the clamping of the support frame requires a lot of experience and skill of the operator in the crane device. Due to fluctuation movements of the crane rope suspended drill can lead to delays in the workflow.

The invention has for its object to provide a drilling apparatus and a drilling method, with which an efficient creation of a hole in a casing pipe is possible even under adverse weather conditions.

The object is achieved by a drilling device with the features of claim 1 or by a drilling method with the features of claim 8. Preferred embodiments of the invention are specified in the respective dependent claims.

The drilling device according to the invention is characterized in that an adjustable receptacle is arranged at the upper end of the jacket tube, to which the support frame can be fastened, and that the receptacle between a drilling position in which the drill is the same axis to the casing tube, and an offset position is adjustably mounted, in which the receptacle is laterally offset from the casing tube.

A basic idea of the invention is that the drilling device can no longer be completely detached from the jacket tube during the creation of the bore, that is to say, for example, for emptying the drilling tool or when carrying out measuring or maintenance operations. Rather, the drill remains in connection with the jacket tube and is defined here adjusted. In this case, the drill according to the invention is no longer clamped directly to the casing tube, but to a receptacle provided thereon, which is adjustably mounted on the casing tube. For example, in the case of strong winds, a rapid and reliable adjustment of the receptacle with the drill located thereon can take place between a drilling position and an offset position, in which, for example, the drilling tool can be emptied. The offset position is preferably arranged so that there is also a free access to the upper opening of the jacket tube, so that about measurements or additional work can be performed within the hole.

The workflow is simplified as a whole, with a fast and reliable emptying of the drilling tool is possible even in strong winds. In this way, the drilling device according to the invention can be used for example in the offshore area for the creation of foundation piles in the seabed. Strong winds on the sea as well as fluctuation movements of a crane device arranged on a vessel thus have hardly any influence on the workflow.

Basically, the adjustment of the recording can be done by a corresponding movement of the crane device on which the drill is suspended. In this case, the receptacle would be passively guided with respect to the jacket tube. However, it is particularly preferred according to the invention that an adjusting device is provided with drive, with which the receptacle between the drilling position and the offset position is adjustable. The drive of the adjusting device can be arranged on a platform on the casing pipe or on the drill, such as the support frame. The adjusting movement takes place along a guide.

In principle, a pivot joint can be provided for adjusting, so that the receptacle is pivotable relative to the jacket tube by a rotational movement. A particularly simple and reliable arrangement is inventively achieved in that the adjusting device comprises a carriage which is guided along a displacement track. The sliding track can for this purpose have one or two guide rails for a linear sliding movement. However, other adjustment movements may be provided.

In principle, a wide variety of drilling tools can be used on the drill. Particularly advantageous according to the invention are discontinuous drilling tools, including augers count, which screw into the ground. For working in soft soil or under water, it is advantageous according to the invention that the drilling tool is designed as a box drill with a bottom which can be opened to empty the box drill.

A development of the invention is that an actuating mechanism is provided, which is designed for unfolding the bottom of the box drill when the box drill is arranged in the offset position. In a known manner, the hinged floor initially has an opening with a cutting device, so that soil material can be removed and passed through the opening into the cylindrical receiving space of the box drill. Within the box drill, in certain embodiments, a screw may be arranged as an additional conveyor. When the receiving space is filled, the opening is closed by turning the bottom, so that the box drill with the removed soil material from the casing pipe is retracted into the receptacle. Subsequently, the box drill can be transported with the recording for emptying to the offset position. By means of an actuating mechanism, which can be actuated, for example, by a short lifting movement of the drilling device via the crane device, a closure of the bottom can be unlocked. In this case, the floor can be folded around a pivot joint, so that the soil material can fall by gravity from the receiving space of the box drill.

A further preferred embodiment of the invention results from the fact that when adjusting the recording of the offset position in the drilling position an unfolded bottom of the box drill is closed. By a wedge-shaped or ramp-shaped control element, for example, during a displacement movement back into the drilling position of the unfolded floor back to its closed position be pressed, with the closure of the floor locked again. If the drilling tool with the receptacle is again in the drilling position, the drilling tool can be lowered through the telescopic linkage to continue the drilling into the jacket tube.

It is preferred according to the invention that at the top. End of the jacket tube, a platform is provided, on which the receptacle and the adjusting device are arranged. The platform with the receptacle is releasably connected via suitable fastening means with the jacket tube. After completion of the drilling work, the platform can be loosened again from the jacket pipe and placed on a new jacket tube, which was pressed into the ground. For this purpose, the platform may have corresponding connecting devices for a cable suspension.

With regard to the drilling method, the invention is characterized in that the support frame of the drill is attached to a receptacle which is disposed at an upper end of the jacket tube, and that the drill by the recording between a drilling position in which the drill on the recording axis of the Jacket tube is, and is adjusted at an offset position in which the receptacle is laterally offset from the jacket tube.

As described above, acceleration and simplification of the workflow are achieved by the recording according to the invention.

A preferred method according to the invention is that in the offset position a drilling tool of the drill is emptied of removed soil material. It can be carried out as a batch process, which is particularly advantageous for soft soils.

According to the invention, it is provided that the drill is held both in the drilling position and in the offset position via a telescopic linkage to a crane device. In particular, the crane device can be a boom or a crane customary on construction sites, on which the drill device hangs on a crane cable. In particular, the telescopic linkage may be a so-called Kelly linkage, which is actuated directly by the crane cable for adjusting the drilling tool. The drilling method according to the invention is also suitable in particular for be confirmed by means of a crane device on a ship or other watercraft, which is exposed for example due to the wave motion particularly strong fluctuations.

Further, it is provided according to the invention that the jacket tube is introduced into the ground, in particular pressed. For this purpose, a known pressing device can be used. It is also according to the invention that finally the created hole in the casing tube filled with concrete mass and a bored pile is formed.

For carrying out the drilling method, it is possible, in particular, to use a drilling device, as described, for example, in the introduction mentioned above EP 1 154 078 B1 is known.

Fig. 1

schematische Ansichten der erfindungsgemäßen Vorrichtung und des Verfahrens in verschiedenen Stadien beim Erstellen der Boh- rung;

Fig. 2

eine schematische Seitenansicht beim Verstellen des Bohrgerätes von der Bohrposition zur Versatzposition;

Fig. 3

eine schematische Seitenansicht der Bohrvorrichtung in der Versatzposition; und

Fig. 4

eine schematische Teilquerschnittsansicht eines erfindungsgemä- ßen Bohrgerätes.

The invention will be further described by means of preferred embodiments, which are shown schematically in the accompanying drawings. In the drawings show:

Fig. 1

schematic views of the device and the method according to the invention in various stages when creating the drilling;

Fig. 2

a schematic side view when adjusting the drill from the drilling position to the offset position;

Fig. 3

a schematic side view of the drilling device in the offset position; and

Fig. 4

a schematic partial cross-sectional view of a drill according to the invention.

In Fig. 1a the initial phase is shown in the implementation of a drilling method according to the invention. First, a jacket pipe 5, shown only partially, is introduced in a manner known per se with a feed device into a relatively soft bottom 2, which in the illustrated embodiment is below a body of water 3. The jacket tube 5 protrudes beyond the surface of the water body 3, so that in the upper region of the jacket tube 5, a receptacle 20 mounted rotationally fixed can be. In the illustrated embodiment, a platform 30 is releasably secured in the upper region of the jacket tube 5.

As part of the drilling device 10 according to the invention, a drill 100 is lowered in the direction of the receptacle 20 via a telescopic linkage 130, which is held on a crane device 60 by a crane cable 62. In the present example, the crane device 60 comprises a track-mounted tracked vehicle which is arranged on a floating pontoon 7.

As in Fig. 1b illustrated, the drill 100 is drained into the approximately tubular receptacle 20, and attached to the top of the receptacle 20. In the position shown in accordance with Fig. 1b is the receptacle 20 with the drill 100 received therein and the telescopic linkage 130 coaxially to the center axis of the casing tube 5. In this drilling position can now extend by extending the telescopic rod 130, a drilling tool 140 of the drill 100 in the casing tube 5 and drill out therein soil material.

In Fig. 1c is shown a possible final depth at which the telescopic telescopic telescopic boom 130 is extended.

In principle, the jacket tube 5 can extend to the lower end of the bore, that is, to the bore sole. In this case, a completely cased bore would be created. Alternatively, the jacket tube 5 can be arranged only in an upper region of the bore, in which there is relatively soft soil material. If there are more stable soil layers underneath, further piping is not necessary, so that the bore can also be sunk below a jacket tube 5.

How out Fig. 2 it can be seen, in the drilling apparatus 10 according to the invention, the drilling tool 140 is formed as a box drill with a cylindrical receiving box 146, which serves to carry out a discontinuous drilling method.

By corresponding rotational movement of the drilling tool 140, which is rotationally driven via the telescopic rod 130 by means of a drill drive 116, soil material within the casing tube 5 is removed and conveyed through an opening in a bottom in the receiving box 146. If this is filled, the drilling tool 140, after the opening in the bottom of the drilling tool 140 is closed by a short counter rotation, via the telescopic linkage 130 and the crane cable 62 from the casing tube 5 moves back into the receptacle 20. Subsequently, the receptacle 20 is moved with the drill 100 by means of an adjusting device 40 to an offset position. For this purpose, the adjusting device 40 has a displacement track 44 with rails, which is arranged transversely to the casing tube 5 along the platform 30. At the bottom of the sleeve-shaped receptacle 20 is a carriage 40, which is movable along the displacement track 44 by means of a drive, not shown.

As in Fig. 2 illustrated, the platform 30 is arranged approximately horizontally above the water body 3 and releasably secured via a support structure 32 and retaining sleeves 34 at the upper end of the jacket tube 5.

Upon reaching the offset position, which in Fig. 3 is shown, a bottom 142, which is pivotally hinged on a hinged joint 144 on the underside of the receiving box 146, can be opened via an actuating mechanism 50. The floor 142 can thereby unfold into the illustrated vertical position, so that the soil material within the receiving box 146 can fall down. Subsequently, the receptacle 20 is pushed back with the drill 100 back to the right in the direction of the casing tube 5 in the drilling position. Here, the bottom 142 is pushed back into the horizontal closure position on the receiving box 146, in which the bottom 142 is locked by a shutter, not shown. Subsequently, a new drilling step can be performed until the receiving box 146 is filled again and must be moved to emptying in the offset position again.

A preferred attachment of the drill 100 to the receptacle 20 is shown schematically in FIG Fig. 4 clarified. The drill 100 has a support frame 110 which is provided at its lower end with transverse struts 117. On the underside of the transverse struts 117 on the one hand attachment bracket 111 are arranged, with which the drill 100 can be placed on an upper edge of the sleeve-shaped receptacle 20. Offset to the attachment brackets 111, one or more attachment devices 114 are provided, which hydraulically actuated collets exhibit. With these collets, the support frame 110 can be rotatably attached to the receptacle 20.

Furthermore, the drill drive 116 is also arranged on the support frame 110 for rotationally driving the drilling tool 140 via the telescopic linkage 130.

In the illustrated embodiment, the support frame 110 is formed in two parts with a support frame base 115 and an overlying support frame top 113. The support frame upper part 113, which is axially adjustable by means of hydraulic cylinders 112 with hydraulic cylinder pistons 112a relative to the support frame lower part 115, the drill drive 116 is fixed.

By loosening the fastening device 114, the drill 100 can be pulled out of the receptacle 20 upwards and then placed on a receptacle on another jacket tube to create a further hole.

Claims (11)

1. Drilling device with a drilling apparatus (100) for drilling inside a casing tube (5), the drilling apparatus (100) having a supporting frame (110) with a fastening means (114) for fixation with respect to the casing tube (5) and a drilling tool (140), which is driven in a rotating manner via a telescopic rod (130) by means of a drill drive (116) arranged on the supporting frame (110),
   characterized in that

   - at the upper end of the casing tube (5) an adjustable receiving part (20) is arranged, onto which the supporting frame (110) of the drilling apparatus (100) can be fastened, and

   - in that the receiving part (20) is adjustably supported between a drilling position, in which the drilling apparatus (100) is located at the receiving part (20) on the same axis with respect to the casing tube (5), and an offset position, in which the receiving part (20) is laterally offset with respect to the casing tube (5).
2. Drilling device according to claim 1,
   characterized in that
   an adjusting means (40) with drive is provided, with which the receiving part (20) can be adjusted between the drilling position and the offset position.
3. Drilling device according to claim 2,
   characterized in that
   the adjusting means (40) has a carriage (42) that is guided along a displacement path (44).
4. Drilling device according to any one of claims 1 to 3,
   characterized in that
   the drilling tool (140) is designed as a drilling bucket with a bottom (142) which can be hinged open for emptying the drilling bucket.
5. Drilling device according to claim 4,
   characterized in that
   an actuating mechanism (50) is provided, which is designed for hinging open the bottom (142) of the drilling bucket when the drilling bucket is arranged in the offset position.
6. Drilling device according to claim 4 or 5,
   characterized in that
   during adjustment of the receiving part (20) from the offset position into the drilling position a hinged open bottom (142) of the drilling bucket can be closed.
7. Drilling device according to any one of claims 2 or 6,
   characterized in that
   at the upper end of the casing tube (5) a platform (30) is provided, on which the receiving part (20) and the adjusting means (40) are arranged.
8. Drilling method for producing a drill-hole inside a casing tube (5), in particular by means of a drilling device (10) according to any one of claims 1 to 7,
   in which a supporting frame (110) of a drilling apparatus (100) is fixed with respect to the casing tube (5) and, by means of a drill drive (116) arranged on the supporting frame (110), a drilling tool (140) is driven in a rotating manner via a telescopic rod (130), whereby soil material is removed inside the casing tube (5),
   characterized in that

   - the supporting frame (110) of the drilling apparatus (100) is fastened onto a receiving part (20) which is arranged at an upper end of the casing tube (5), and

   - in that by means of the receiving part (20) the drilling apparatus (100) is adjusted between a drilling position, in which the drilling apparatus (100) is located at the receiving part (20) on the same axis with respect to the casing tube (5), and an offset position, in which the receiving part (20) is laterally offset with respect to the casing tube (5).
9. Drilling method according to claim 8,
   characterized in that
   in the offset position a drilling tool (140) of the drilling apparatus (100) is emptied of removed soil material.
10. Drilling method according to claim 8 or 9,
    characterized in that
    both in the drilling position and in the offset position the drilling apparatus (100) is held via a telescopic rod (130) on a crane means (60).
11. Drilling method according to any one of claims 8 to 10,
    characterized in that
    the casing tube is introduced into the soil and
    in that subsequently a concrete mass is filled into the produced drill-hole in the casing tube and a drilled pile is formed.

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