DE202009010814U1 - Device for closing a borehole and subsequent injection with injection material - Google Patents

Abstract

Device for closing a borehole and for injection with injection material consisting of an injection tube with a tensioning elastic located on the injection tube and a rubber seal located on the injection tube at the rear end of the device, characterized in that between the rubber seal (3) and the clamping rubber (4 ) A clamping device is arranged.

Description

The The invention relates to a device for closing a borehole and subsequent injection with injection material, in particular for injection in rock walls.

These are disposable packers from Gurlita GMA AB, Vitsandsvägen 76, SE-685 23 Torsby ( www.gma.se/injektionfittings/packer ) and CODAN AS, Knud Bryns vei 5, SE-0581 Oslo ( www.codan-gummi.no/portal/statiskinfo/vare-produkter ) for the closure of a wellbore and for injection with injection material, which consist of an injection tube with a located on the injection tube tensionable elastic rubber and located at the rear end of the device on the injection pipe rubber seal. The disposable packers are placed in a borehole, the clamping rubber on the injection tube is clamped by compression and jammed in the rock, then the injection takes place. If a higher injection pressure is required, the rubber gripper does not hold the disposable packers in the rock, which precludes injection and requires repeating the entire procedure.

task The invention is a device for closing a borehole and subsequent injection with injection material create, which are firmly anchored in the rock or the like so it can not be pushed out of the hole during injection and which seals the hole so that in the rock with Material not injected at a pressure higher than 30 bar can emerge from the borehole again.

According to the invention the problem is solved by the features of the main claim. Embodiments of the invention are in the subclaims shown.

Of the Advantage of the invention is that the device safely is kept in the rock, ensuring a safe injection at high Pressure can be applied while simultaneously sealing the borehole, so that the leakage of the injected material is avoided.

The Invention will be described below with reference to an embodiment explained in more detail. The accompanying drawing shows

1 a device for closing a borehole and for injection with injection material,

2 FIG. 2: a section through the device for closing a borehole and for injection with injection material, FIG.

3 a slotted expansion sleeve,

4 a spreading cone,

5 an L-shaped thrust washer and

6 : a circlip.

In 1 a device for closing a borehole and subsequent injection with injection material is shown and in 2 a longitudinal section through this device.

An injection tube 1 is closed at its rear end, but has to exit the injection material cross holes 2 on. These cross holes 2 be in a known manner by a rubber seal 3 enclosed. On the front end of the injection tube 1 there is a usual rubber band 4 with which the device is fixed in the rock and seals the borehole against back-flowing injection mass, that is, the clamping rubber 4 is compressed axially, whereby its cross-section increases and seals against the rock. For better clamping are at both ends of the clamping rubber 4 and at the rear end of the rubber seal 3 on the injection tube 1 one disc each 5 arranged, whose diameter is approximately the diameter of the clamping rubber 4 equivalent. At the front end of the injection tube 4 , are several, for example, five, retaining rings 6 . 6 , on the injection tube 1 arranged so that they are the front disc 5 on the injection tube 1 fixed. The circlips 6 are discs with an outer surface 12 and inwardly projecting, slightly angled, feathers 14 , The feathers 14 protrude so far inward, that they after pushing on the injection tube 1 on this pinch and the discs 5 with intermediate tension rubber 4 fix. After the circlips 6 is a diameter of the retaining rings 6 corresponding pressure disc 7 . 5 , on the injection tube 1 arranged, which also by another circlip 6 before slipping off the injection tube 1 is held. The cross section of the thrust washer 7 is L-shaped, with the short leg 11 of the L on the outer surface 12 the circlips 6 shows and the towards pressure disc 7 folded springs 14 the circlips 6 leaves free. The long thigh 13 forms a pressure surface for tensioning the clamping rubber 4 ,

On the middle of the injection tube 1 , between the two discs 5 that the elastic band 4 and the rubber seal 3 limit, there is a second clamping device for clamping the device in the rock. It consists of two spreader cones 8th . 4 , and an expansion sleeve 9 . 3 , The large outer diameter of the expansion cone 8th corresponds to the outer diameter of the discs 5 , the small outer diameter of the expansion cone 8th are smaller than the inner diameter of the expansion sleeve 9 , The expansion sleeve 9 is substantially cylindrical, is tooth-shaped on its outer side and has axial slots 10 on.

3 shows an expansion sleeve 9 , In the exemplary embodiment, the expansion sleeve 9 five teeth 15 on and is slotted four times, two opposite slots 10 are from rubber seal direction 3 slotted, the other two slots 10 are from the direction of elastic rubber 4 slotted.

4 shows one of the two expansion cone 8th , He is conical.

Both spreader cones 8th protrude in the device, 2 , in the expansion sleeve 9 , Be the expansion cone 8th tense, so in the expansion sleeve 9 Pressed, the expansion sleeve 9 on the sides of the open slots 10 spread, causing the teeth 15 the expansion sleeve 9 anchor the device in the rock.

1

injection tube

2

transverse holes

3

rubber seal

4

clamping rubber

5

disc

6

Retaining rings

7

thrust washer

8th

expanding cone

9

expansion sleeve

10

slots

11

short Legs of the thrust washer

12

outer Surface of the retaining rings

13

longer Legs of the thrust washer

14

feathers the circlips

15

teeth

QUOTES INCLUDE IN THE DESCRIPTION

This list The documents listed by the applicant have been automated generated and is solely for better information recorded by the reader. The list is not part of the German Patent or utility model application. The DPMA takes over no liability for any errors or omissions.

Cited non-patent literature

• - www.gma.se/injektionfittings/packer [0002]
• - www.codan-gummi.no/portal/statiskinfo/vare-produkter [0002]

Claims (5)

Apparatus for closing a borehole and for injection with injection material consisting of an injection tube with a tensioning elastic located on the injection tube and a rubber seal located on the injection tube at the rear end of the device, characterized in that between the rubber seal ( 3 ) and the elastic rubber ( 4 ) A clamping device is arranged. Device according to claim 1, characterized in that the clamping device consists of two expanding cones ( 8th ) and an expansion sleeve ( 9 ) consists. Apparatus according to claim 1 or 2, characterized in that the expansion sleeve ( 9 ) is slotted and on the outer circumference teeth ( 15 ) having. Device according to claim 1, 2 or 3, characterized in that the slots ( 10 ) are arranged such that the expansion sleeve ( 9 ) when tensioning the expansion cone ( 8th ) is spread at their ends. Device according to one of claims 1 to 4, characterized in that the clamping rubber ( 4 ) of two discs ( 5 ) is limited, that for stopping on the injection tube ( 1 ) on the clamping side of the clamping rubber ( 4 ) Circlips ( 6 ) with springs ( 14 ) are arranged and that for tensioning the clamping rubber ( 4 ) without the springs ( 14 ) to crush an L-shaped thrust washer ( 7 ) is arranged such that the springs ( 14 ) from the thrust washer ( 7 ) are not touched.