Heli-Rig is one of the rig design concepts for shallow water environments.

1. Independent of water depth. Requires a support structure which in itself would not be helicopter transportable, and therefore could only be used with a minimum of two support structures and a leap-frog operation.

2. Proven technology, but limited drilling capability. Pumping and hoisting capabilities of heli-rigs may not be compatible with well designs.

3. In theory could moved between locations year round, thus circumventing water depth and ice cover limitations.

4. Concept should . . .

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