SU1293359A1 - Apparatus for injecting plugging composition - Google Patents

Abstract

The invention relates to the mining industry, to equipment for the production of cementing operations. The aim of the invention is to improve the quality of the cement by preventing the breakthrough of the cement slurry through cracks in the rock near the sealer. The device includes an injector 2 installed in the borehole I with a rubber cuff sealing device 3 and a tubular elastic insulating sheath 4 with a valve 5 and a dismantling cable 6. The diameter of the shell 4 is larger than the diameter of the well 1. The valve 5 is made in the form of an elastic ring covering the end of the shell 4 facing to the bottom of the well 1. The other end of the shell 4 is placed at the mouth of the well 1 between its walls and the sealer 3. The elastic shell 4 is inserted into the well 1 along with the dismantling cable 6. The cuff of the sealer 3 is installed inside bolochki 4. Then inject cement slurry. It, getting inside the sheath 4, straightens it and presses it against the walls of the well 1. When the pressure inside the sheath increases, the valve 5 opens, the solution enters the well I and penetrates into the cracks and cavities of the massif. After the completion of the injection of the solution, the sealer 3 is removed, and the shell 4 is removed from the well by the dismantling cable 6. 1 sludge. (L u w th about: 00 sd w

Description

The invention relates to the mining industry, namely, equipment for the production of cement works for the purpose of water-pressure or hardening of rocks.

The purpose of the invention is to improve the quality of cementing by preventing the breakthrough of cement slurry through trash, in the rock near the sealer.

The drawing shows a device for injecting cement slurry, a slit.

The device for injecting cement slurry consists of an injector 2 installed in the bore 1 with a seal 3 of rubber cuffs and pipes 10

Due to the excessive pressure created by the valve 5 inside the shell 4, it is tightly pressed against the walls of the well 1, repeating all their irregularities, which prevents undesirable free filtration of the cement slurry along the walls to the wellhead 1 and pouring it through the cracks to the surface, min deep areas an array of rocks, demanding, tamponage. The total injection pressure is transmitted through the shell 4 to the walls of the well 1, which significantly reduces the requirements for the strength properties of the shell material. The gaps in the bottom part of the shell are excluded due to the small pressure difference created by the valve 5, therefore the shell

4 elastic insulating sheath 4

with the valve 5 and the dismantling cable 6. it is possible to make, for example, polyethylene; Cuffs of the sealer 3 are unstuck in the wall, etc. After completion of the injection of the well bore 1 using a threaded seal, the sealer 3 is removed and the shell 4

7. To the injector 2 is attached rast-extracted from the well 1 for dismantling

The duct 8. The valve 5 is made in the form of elastic 6, after which the device is suitable for an o-ring covering the end of the 2 further repeated use 4, facing the bottom of the well 1. The other end of the sheath 4 is placed in the wellhead 1 between its walls and sealer 3, and the diameter of the shell 4 is larger than the diameter of the well 1. Disassembly cable 6 is fixed on the valve 5, 25 is passed through the shell 4 and brought to the surface beyond the limits of the well 1.

The device works as follows.

An elastic sheath 4 is introduced into the borehole 1 along with a dismantling cable 6

neither

The proposed device makes it possible to use for a plugging well with significant wall irregularities and axis curvatures (for example, remaining after explosions of camouflage gaps in order to unload the array from stresses).

Claims (1)

Invention Formula with the help of a dispatch (thin metal rod, etc.). The end of the cable 6 is left outside the bore 1. The seals of the sealer are installed inside the shell 4 and are dispersed using the seal 7. Then the solution line 8 is connected and the cement slurry is injected. The last one, getting inside the sheath 4, spreads it out and presses it against the walls of the well 1 due to some (0.02-0.05 MPa) excess pressure created by the valve 5. A device for injection of cement slurry, including an injector installed in the well with a sealant, characterized in that, in order to improve the quality of the cementing by preventing breakthrough of the toning solution through cracks in the rock near the sealant, it is equipped with a tubular elastic insulating sheath end of the shell facing the bottom of the well, while If the pressure inside the envelope rises, the other end of the envelope is placed at the mouth valve 5 expands, the solution flows down the wells between its walls and the sealing hole 1 and penetrates into the cracks and the opening, and the shell diameter is larger tota of the massif. borehole diameter. Due to the excessive pressure created by the valve 5 inside the shell 4, it is tightly pressed against the walls of the well 1, repeating all their irregularities, which prevents undesirable free filtration of the cement slurry along the walls to the wellhead 1 and pouring it through the cracks to the surface, min deep areas an array of rocks, demanding, tamponage. The total injection pressure is transmitted through the shell 4 to the walls of the well 1, which significantly reduces the requirements for the strength properties of the shell material. The gaps in the bottom part of the shell are excluded due to the small pressure difference created by the valve 5, therefore the shell can be made, for example, from polyethylene, etc. After completion of injection, stretch cable 6, after which the device is suitable for further repeated use neither The proposed device makes it possible to use for a plugging well with significant wall irregularities and axis curvatures (for example, remaining after explosions of camouflage gaps in order to unload the array from stresses). Invention Formula A device for injection of cement slurry, including an injector installed in the well with a sealant, characterized in that, in order to improve the quality of the cementing by preventing breakthrough of the toning solution through cracks in the rock near the sealant, it is equipped with a tubular elastic insulating sheath end of the shell facing the bottom of the well, while the other end of the shell is located at the mouth