DD277875A1 - METHOD FOR REMOVING DRILLING CORE AND WEDGE THEREFOR - Google Patents

Abstract

The method is intended for removing cores when drilling with core drills, especially those with small core diameters. It provides that after drilling and breaking of the core into the drill bit a wedge with low inclination is inserted. The drill bit is then forced into the drilling gap and the drill core is clamped by the wedge against the inner wall. When pulling out the drill bit, the core is taken along and then removed from it. Conveniently, the wedge is magnetic or provided with an adhesive layer.

Description

For this 1 page drawing

Field of application of the invention

The invention relates to a method for removing cores when drilling with core drilling equipment, in particular those with small core diameters and a wedge for performing the method.

Characteristic of the known state of the art

The removal of the cores when drilling with core drills is problematic in practice. For drilling in the construction industry, core tongs ("Gölz Construction Equipment" prospectus) are known, which require a special type of tongs for each diameter, and can only detect core cores that reach almost to the surface.

For core drilling equipment, an adapter (brochure or product catalog "Hilti Diamond Drill DCM1), which is operated by means of a wet vacuum cleaner, has already been proposed for core removal. However, only very small diameter cores can be removed with a special device that extends to the surface.

Furthermore, a core gripper has already been proposed, which ensures the parallelism of the gripping jaws by a special linkage system and can be used for a large diameter range. With this core grab drill core parts can be detected in all drill hole depths.

Due to the construction parts for operating the gripping jaws, these devices can be used to remove the Bohrkor.ne only 3b a certain minimum hole diameter.

Object of the invention

The aim of the invention is to develop a method by which cores, in particular with small diameters, can be easily removed. The method should be practicable with low device overhead and ease of handling, and allow the removal of deeper core wellbore parts.

Explanation of the essence of the invention

The invention has for its object to propose a method for removing cores, in which the core drill itself or the drill bit is used.

According to the invention the object is achieved in that after drilling and breaking of the core in the drill bit a wedge low inclination is inserted. Thereafter, the drill bit is pressed with the wedge in the Bohrspalt and clamped by the wedge of the core against the inner wall of the drill bit. When removing the drill bit from the well, the core is taken, tr is then removed from the drill bit or, if necessary, knocked out from the back.

For carrying out the process, worn-out ion sleeves of the same diameter can be used.

It is within the meaning of the invention that after drilling the wedge for breaking the core is driven into the Bohrspalt.

According to the invention, the wedge for carrying out the method for removing cores is magnetic or its applied to the inner wall of the drill bit surface is provided with an adhesive layer.

The wedge may be formed on one side or inclined in both directions with the same or different inclination ratios.

embodiment

The invention will be explained in more detail with reference to an embodiment.

The drawing shows a section through the drill hole with depressed drill bit and wedge.

In a concrete component 1 is to introduce a hole that is to be deeper than the length of the drill bit 2. With a core drill a hole corresponding to the length of the drill bit 2 is performed. With the help of a wedge, the core 3 is broken and then removed *.

To increase the drill hole depth, another section is drilled (see drawing) and the core is broken. The limited by the breaking points 4 core 3 is also to remove. If necessary, further drill stages can be connected until the final drill hole depth is reached. The removal of the broken cores 3 is performed using the drill bit 2. In this a magnetic wedge 5 is inserted.

In the exemplary embodiment, the wedge 5 is inclined in both directions with equal inclination ratios. Instead of the drill bit 2 and a worn crown sleeve 6 without cutting segments 7 can be used.

The drill bit 2 with the wedge 5 is printed on the core 3 in the Bohrspalt 8. As a result, the core 3 is clamped against the inner wall of the drill bit 2.

When removing the drill bit 2 from the borehole of the core 3 is taken. This is pulled out of the drill bit 2 or, if necessary, carefully knocked out from the back with a rod from the unscrewed drill bit 2.

After removal of the magnetic wedge 5 can be further drilled with the drill bit 2.

For the method for removing cores are essentially used for drilling equipment required.

In addition, only a simple producible wedge of low inclination is required, which is magnetized for better support or provided with an adhesive layer.

The wedge can be used with appropriate design for breaking the core.

The method is particularly easy to carry out for removing cores of small diameter. The time required remains low even with the constant change of drilling and Bohrkernfernfernen.

Claims (5)

1. A method for removing cores when drilling with core drilling, .nsbesondere of those with small core diameters, characterized in that dai? .Lach drilling and breaking the core (3) in the drill bit (2) a wedge (5) is inserted with low inclination that the drill bit (2) with the wedge (5) pressed into the Bohrspalt (8) and through the wedge (5) of the drill core (3) is clamped against the inner wall of the drill bit (2), that when removing the drill bit (2) taken out of the wellbore of the core (3) and then removed from the drill bit or, if necessary, from the back is knocked out. 2. The method according to claim 1, characterized in that find worn on Kronenhülse.i (6) use. 3. The method according to claim 1 and 2, characterized in that after drilling the wedge (5) for breaking the core (3) is driven into the Bohrspalt (8). 4. wedge for removing cores, characterized in that it is magnetic or its on the inner wall of the drill bit (2) abutting surface is provided with an adhesive layer. 5. wedge according to claim 4, characterized in that it is formed on one side or inclined in both directions with the same or different inclination ratios.