Drilling implement and method for installing a drilling pillar in the ground

Abstract

The invention relates to a drilling implement for installing or erecting a drilling pillar in the ground, having a mast, a carriage displaceably mounted on the mast, a rotary drive located on the carriage for the rotary driving of a drill pipe and a pipe bunker connectable to the drill pipe with a storage area for fill material for filling a drill hole on drawing the drill pipe. According to the invention it is provided that the pipe bunker is axially adjustably mounted with respect to the carriage on said carriage. The invention also relates to a method for installing or erecting a drilling pillar, which can be implemented with a drilling implement according to the invention.

Description

The invention is described in greater detail hereinafter relative to preferred embodiments and the attached diagrammatic drawings, wherein show:

FIG. 1 An embodiment of an inventive drilling implement for performing the inventive method.

FIG. 2 A detail view of the drilling implement of FIG. 1 in the vicinity of the carriage.

FIG. 3 An alternative designed pipe bunker for use in an inventive drilling implement.

Identically or analogically acting elements are given the same reference numerals throughout the drawings.

A first embodiment of an inventive drilling implement is shown in FIGS. 1 and 2. The drilling implement has a chassis 1 on which is pivotably located a mast 2. A carriage 22 displaceably guided along the mast 2 is provided on the front of the latter.

On carriage 22 is provided a drilling drive 11 displaceable with said carriage 22 along mast 2 and with which it is possible to rotate a drill pipe 6 with a displacement drill head 80 running along mast 2. The drilling drive has an upper drive part 12, in which is provided a not shown drive motor, as well as a gear part 13 located below the same. On the bottom of said gear part 13 is provided a driven shaft 19 in the form of a hollow shaft.

In the extension of the drill pipe 6 an extension pipe 40 is provided at the top of said drill pipe 6. This extension pipe 40 is coupled in axially fixed and torque proofed manner with the drill pipe 6 by means of a pipe coupling 18. The extension pipe 40 runs axially through the drilling drive 11. At the top end of extension pipe 40 and above the drilling drive 11 and in an extension of the extension pipe 40 and the drill pipe 6 is provided a pipe bunker 30. The pipe bunker 30 serves to receive fill material, which via extension pipe 40 can be introduced by means of the drilling drive 11 into drill pipe 6.

Pipe bunker 30 together with the extension tube 40 located thereon and the drill pipe 6 are located axial displaceably, i.e. in arrow direction A, relative to the drilling drive 11 and carriage 22. In FIGS. 1 and 2 pipe bunker 30 is in an upper position, in which it is located at a comparatively large distance from the drilling drive 11. From said position and together with the drill pipe 6 located thereon, it can be moved downwards towards the ground, so that the existing length of the drill pipe 6 below carriage 22 and drilling drive 11 increases.

For torque transmission between drilling drive 11 and drill pipe 6, movable axially with respect thereto, the extension pipe 40 connected in a torque proofed manner with drill pipe 6 is externally provided with a spline corresponding to internal teeth in drive shaft 19.

For fixing an axial relative position of pipe bunker 30 and drill pipe 6 relative to carriage 22, a not shown holding device is provided on drilling drive 11 and it e.g. positively and/or non-positively holds extension pipe 40.

On the bottom side of pipe bunker 30 is provided a rotary coupling 60, which uncouples a rotation of drill pipe 6 and extension pipe 40 located thereon from pipe bunker 30.

On carriage 22 is provided a torque support 50, which couples the pipe bunker 30 in torque proofed manner on carriage 22. The torque support has an axially directed jib 52, on which the pipe bunker 30 is axially displaceably guided by means of a side arm. By means of a further side arm the rotary coupling 60 and in particular its fixed part, is axially displaceably and in a torque proofed manner guided on jib 52. The axially directed jib 52 of torque support 50 can e.g. also be telescopable.

Pipe bunker 30 has a roughly cylindrical storage area 33, which is connected to extension pipe 40 by means of a conical outlet area 34 located below the same.

FIG. 3 shows an alternatively constructed pipe bunker 30 for use in an inventive drilling implement. The pipe bunker of FIG. 3 has at the top of the cylindrical storage area 33 a roughly conically constructed cover 36. In said cover 36 are provided several filling openings 37 for filling fill material into the interior of pipe bunker 30. On the cover are also provided several rings 38, 38′ for the raising of pipe bunker 30 using auxiliary equipment.

The pipe bunker of FIG. 3 also has a closure device 71 constructed as a flap between outlet area 34 and extension pipe 40 and makes it possible to close off a fill material passage between the interior of pipe bunker 30 and the interior of extension pipe 40 and therefore the interior of drill pipe 6.

Claims

1. Drilling implement for erecting a drilling pillar in the ground having a mast,a carriage displaceably mounted on mast,a drilling drive located on carriage for the rotary driving of a drill pipe anda pipe bunker connectable to drill pipe and having a storage area for fill material for filling a drill hole on drawing drill pipe,

2. Drilling implement according to claim 1, whereinpipe bunker, together with drill pipe, is axially adjustably mounted relative to carriage.

3. Drilling implement according to claim 1, whereinpipe bunker is located axially above the drilling drive and the drill pipe is at least sectionally axially located below drilling drive.

4. Drilling implement according to claim 1, whereina rotary coupling is provided between pipe bunker and drill pipe and uncouples a rotation of drill pipe from pipe bunker.

5. Drilling implement according to claim 1, whereinon carriage is provided a torque support for the torque proofed supporting of pipe bunker and/or a feed device for feeding fill material into pipe bunker.

6. Drilling implement according to claim 5, whereinpipe bunker and/or the feed device is axially displaceably guided on torque support.

7. Drilling implement according to claim 1, whereinbetween the drill pipe and pipe bunker is provided an extension pipe, which is connected in axially displaceable and in a torque proofed manner to a driven shaft of drilling drive.

8. Drilling implement according to claim 7, whereinthe extension pipe is constructed as a kelly bar with longitudinal grooves for torque transmission and locking pockets for axial force transmission.

9. Drilling implement according to claim 1, whereina closure device is provided making it possible to close off an access for fill material from pipe bunker to drill pipe.

10. Method for erecting a drilling pillar in the ground, particularly using a drilling implement according to claim 1, in which a drill pipe is introduced in rotary manner into the ground by means of a drilling drive, which is located on a carriage displaceable in the drilling direction along a mast andafter reaching a desired depth, the drill pipe is retracted and the cavity formed thereby is filled by means of the drill pipe with fill material from a pipe bunker located on the drill pipe,