DE202004019168U1 - Drill for earth-moving, mining has feed tubes that can be assembled, advanced, drill tool reversibly connected to last tube with external size less than/equal to tube internal diameter or can be changed so tool can be moved out of tube - Google Patents

Abstract

The drilling device consists of feed tubes (1) can be assembled and advanced and a drill tool (3) on the last tube that is reversibly connected to the tube and whose external size is less than/equal to the internal diameter of the tube or can be changed so that the drilling tool is movable up out of the tube.

Description

The The invention relates to a drilling device for use in earth or Mining and drilling in the ice.

such Drilling devices are known.

So will in the DE 31 10 198 A1 a well for mining is drilled at an angle to the vertical. This is done by means of a drill pipe arranged on a drill pipe. Since the borehole behind the drill head can deform due to the rock pressure, it is provided to ensure the withdrawal of the drill head that the drill head also has drill bits on the rear side.

In the DE 28 39 868 A1 a drill bit is described, the space jaws are displaced outwards or inwards. By means of this broaching jaws a borehole is driven, in which a casing is inserted during drilling. In order to be able to extract the drill bit, which is driven by a separate drill string, a retraction of the broaching jaws takes place inwardly and thus a reduction in diameter to less than the inner diameter of the casing.

Furthermore, from the DE 37 20 573 A1 a releasably insertable into a borehole tube tour tool known.

Around to prevent that in case of becoming necessary boring of the tool this stationary remains and does not rotate in the tubing, is a rotation provided between the pipe and the tool.

With these solutions is an increase the effectiveness the introduction of bores, especially in loose soil and rock or in ice is not possible.

task The invention is to provide a drilling device without additional drill pipe works, allows the extraction of the drill head and a wall protection of the wellbore.

Is solved This object with the features of claim 1, advantageous embodiments Subject of the dependent claims.

The Drilling device according to the invention for use in earth or Mining and drilling in ice consists of composable and fuel pipes that can be driven, being at the lower end of the last lower Casing a drill bit is arranged, the detachable is connected to the casing and whose outer dimensions are smaller than / equal to the inner diameter of the casing or its external dimensions to a size less than / equal the inner diameter of the casing are changeable, so that the drill bit after at the top of the casing is movable out.

At least the lower casing shows the outside a cutting spindle, by means of which the casing pipes in the soil are drivable.

The releasable Connection between the casing and a cylindrical shaft of the drill bit is preferably formed by a thread pairing, which is formed is that when driving the casing into the material to be drilled the drill bit Partially unscrewed from the lower casing, the Movement of the drill bit against the Casing is limited by a stop. The shank of the drill bit or a part of the shank of the drill bit is so tight with the Threaded part of the casing.

Farther is provided that the drill bit inside the casing a Recording for a rod by means of which the drill bit in the interior of the lower Casing until it is released is rotatable from the casing and then can be pulled out.

The invention will be explained with reference to the drawing. The drilling apparatus shown in the figure for use in earthworks or mining as well as for drilling in ice consists of composable and propable casings 1 , At the lower end of the last (lower) casing 1 is the drill bit 3 , This is detachable with the casing 1 connected and its outer dimensions are smaller than / equal to the inner diameter of the casing 1 , This gives the possibility of the drill bit 3 after loosening from the casing 1 up from the casing 1 pull it out.

The task of the drilling rig for turning the drill bit 3 assume in this drilling device the connectable casing pipes 1 , For this, at least the lower casing 1 outside a cutting spindle 2 on, by means of which the casings 1 with propulsion into the material to be drilled are screwed.

In the illustrated advantageous embodiment, the drill bit 3 a cylindrical shaft. The detachable connection between the lower casing 1 and the cylindrical shank of the drill bit 3 consists of a thread pairing 4 , This thread pairing 4 is designed so that during the propulsion of the casing 1 into the soil of the drill bit 3 from the casing 1 is unscrewed, with the movement of the drill bit 3 across from the casing 1 through a stop 5 is limited. The drill bit 3 braced so during propulsion with the lower casing 1 , wherein the shank or a part of the shank of the drill bit 3 in the casing 1 remains. Of course, other releasable axial locks are also between the lower casing 1 and the drill bit 3 used.

To remove the drill bit 3 points the drill bit 3 inside in the casing 1 a recording 7 for a pole, by means of which the drill bit 3 into the interior of the casing 1 until loosening from the casing 1 rotatable and then pulled out. It is understood that the on the lower casing 1 still above the casing pipes 1 no longer need to have an internal thread, but should be smooth throughout.

The recording 7 is preferred as a threaded hole 6 designed with a frusto-conical cross-section, wherein the rod has a suitable external thread at the bottom. This design facilitates the connection between the rod and the drill bit 3 ,

The casing pipes 1 remain in the hole and can be used to insert other tools, such as gauges, filters, valves, etc., without the risk of contamination or jamming with the drilled material.

1

casing

2

cutting spindle

3

cutting

4

thread pairing

5

attack

6

threaded hole

7

admission

Claims (7)

Drilling device for use in earthworks or mining as well as for drilling in ice, consisting of composite and propellable casings ( 1 ), whereby at the lower end of the last casing ( 1 ) a drill bit ( 3 ) which is releasably connected to the casing ( 1 ) and whose outer dimensions are smaller than / equal to the inner diameter of the casing ( 1 ) or whose outer dimensions are smaller than / equal to the inner diameter of the casing ( 1 ) are changeable, so that the drill bit ( 3 ) up from the casing ( 1 ) is movable out. Drilling device according to claim 1, characterized in that at least the lower casing ( 1 ) outside a cutting spindle ( 2 ), by means of which the casings ( 1 ) are screwed into the ground. Drilling device according to claim 1 or 2, characterized in that the drill bit ( 3 ) has a cylindrical shaft. Drilling device according to claim 3, characterized in that the detachable connection between the casing ( 1 ) and the cylindrical shank of the drill bit ( 3 ) a thread pairing ( 4 ). Drilling device according to one of claims 1 to 4, characterized in that the thread pairing ( 4 ) between the shank of the drill bit ( 3 ) and the ear ( 1 ) is designed so that during the propulsion of the casing ( 1 ) into the material of the drill bit to be drilled ( 3 ) from the casing ( 1 ), whereby the movement of the drill bit ( 3 ) opposite the casing ( 1 ) by a stop ( 5 ) is limited. Drilling device according to one of claims 1 to 5, characterized in that the drill bit ( 3 ) inside the casing ( 1 ) a recording ( 7 ) for a rod by means of which the drill bit ( 3 ) in the interior of the casing ( 1 ) 'until loosening from the casing ( 1 ) is movable, in particular rotatable. Drilling device according to claim 6, characterized in that the receptacle ( 7 ) a threaded hole ( 6 ) is preferably of frusto-conical cross-section and the rod in the lower region has a suitable external thread.