New ultra-deepwater rig with dual rotaries will reduce costs
- Transocean Offshore Inc., Houston, TX (United States)
- Amoco Corp., Houston, TX (United States)
The Discoverer Enterprise, a next generation, ultra-deepwater drill ship with a dual rotary system, will decrease drilling and completion costs by reducing bottom hole assembly (BHA) and tubular preparation time. Transocean Offshore received a contract from Amoco Corp. to build the ultra-deep floating rig and is scheduled to spud its first well in July 1998. It will generally work in water deeper than 6,000 ft. The rig design involves a new approach that addresses the overall well-construction process and equipment required to decrease significantly deepwater drilling time. The Discoverer is the first ultra-deepwater rig designed specifically for handling subsea completions and extended well tests. The paper discusses increased deepwater rig demand, rig construction costs, drillship design, well construction, development drilling, and cost justification.
- OSTI ID:
- 479484
- Journal Information:
- Oil and Gas Journal, Vol. 95, Issue 21; Other Information: PBD: 26 May 1997
- Country of Publication:
- United States
- Language:
- English
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