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Welcome to our Website! |
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Pivotal Drilling boasts over 60 years’ industry experience within its management ranks; |
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We offer services to the resources sector ranging from rig operation and maintenence to project consulting work. |
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Rig Operation and Maintenance |
Pivotal drilling supplies rig operation and maintenance services the coal mining and methane gas sectors, the service is designed to support operators that have purchased their own drilling equipment to secure resources for their drilling needs.
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Drilling Project Supervision |
Pivotal drilling supplies experienced supervisory personnel for a wide range of drilling projects, including coal and mineral exploration, Surface to inseam, LD open hole and various other methods.
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Drilling Personnel |
Pivotal drilling supplies experienced drilling personnel for a wide range of drilling projects, including coal and mineral exploration, Surface to inseam, LD open hole and various other methods. |
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"Today in Australia some 300 km of these inseam holes are drilled each year from underground workings across coal blocks that are to be mined. These holes are made using directional drilling techniques at a cost of about $100,000/km, or a total annual drilling cost of about $30 million. The instantaneous drilling speed achieved by these drills is a respectable 2 m/min, but the delays involved in drill set up, drill pipe installation and removal, surveying and steering, reduces the effective drilling rate to about 80 m/shift; equivalent to less than 0.2 m/min. Obviously the drilling cost is related to the effective drilling rate. In other words if the effective rate was increased the cost would fall.
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A new drilling approach that has the promise to displace much of this underground drilling is the surface-to-inseam method. The technology that has been most widely applied to date is mediumradius drilling (MRD) which starts with an inclined hole at the surface. This hole is deviated into the plane of the coal seam and then drilled for a long distance, typically 1 km, in the seam. The hole is steered to intercept a vertical well (Figure 1). A pump is installed in this well to lower the water table, thereby reducing the pressure in the seam and allowing the gas to flow." - Michael Hood |
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