1,500m-6,000m
Steel casing surrounded
with special cement
Shale rock
Bore
2. Bore is lined with steel and cement and small holes made in the casing and into the shale
1. A vertical hole is drilled into the shale rock. The drill can run horizontally once it enters the shale layer
Sand is used to
keep fissures open
3. High-pressure water, sand and various chemicals are pumped into
the bore. The holes
in the horizontal section allow water to enter and fracture the shale
4. Gas in the rock
is forced into the
bore and flows
to the surface
1,500m-6,000m
Sand is used to
keep fissures open
Steel casing surrounded
with special cement
Shale rock
Bore
2. Bore is lined with steel and cement and small holes made in the casing and into the shale
3. High-pressure water, sand and various chemicals are pumped into
the bore. The holes
in the horizontal section allow water to enter and fracture the shale
1. A vertical hole is drilled into the shale rock. The drill can run horizontally once it enters the shale layer
4. Gas in the rock
is forced into the
bore and flows
to the surface