Method and system of underground deployment of materials and equipment
Jet grouting involves injecting grout into geological material to improve its quality; however, use of jet grouting is limited to situations in which the injection systems can be positioned relatively close to the region to be improved. This can be impractical (for example in heavily built up areas, rough terrain or beneath the seabed) or inconvenient (for example where closing a tunnel would be required). The present invention enables deployment equipment 41 to be passed down a bore in order to deploy material and/or equipment through a hole in the lining of a bore 43 into the underlying geology. In this way, underground assets may be repaired from a location external to the asset, allowing repair in situations where it would be impossible or cost-prohibitive to do so with conventional ground treatment techniques.
1. A method of underground deployment, the method comprising the steps of:
drilling an underground bore through underlying geology;
lining the bore with a pipe;
passing equipment down the bore to a predetermined location;
using the equipment to make a hole at most only partially through the pipe at the predetermined location;
passing deployment equipment down the pipe to the predetermined location;
extending a probe through the hole, the probe configured to punch through the remaining pipe at the predetermined location; and
deploying material and/or equipment through the hole in the pipe into the underlying geology.
2. A system for carrying out the method of underground deployment according to claim 1 , the system comprising:
directional drilling apparatus for drilling an underground bore through underlying geology;
a pipe for lining the bore drilled by the directional drilling apparatus;
pipe lining equipment for lining the bore with the pipe;
equipment configured to pass down the pipe to a predetermined location, and configured to make a hole at most only partially through the pipe at the predetermined location; and
deployment equipment configured to pass down the pipe to a predetermined location, and a probe configured to extend through the hole and punch through the remaining pipe at the predetermined location, and configured to deploy material and/or equipment through a hole in the pipe into the underlying geology.