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Relief-well planning and drilling for a North Sea underground blowout

Journal Article · · Journal of Petroleum Technology; (United States)
OSTI ID:5722113
 [1];  [2]
  1. Saga Petroleum A/S, Stavanger (NO)
  2. Vector Magnetics Inc. (US)
This paper describes relief-well planning and execution for a deep, underground blowout. Key achievements include an innovative relief-well strategy, locating and tracking the target casing with electromagnetic ranging and conventional surveying techniques, and integrating kill pumping units and associated equipment on a semisubmersible. This was the first known instance of relief-well intersection and kill without a plugback and redrill after ranging. The techniques and equipment, plus good teamwork, provided the necessary ingredients to place a bit into a 215.9-mm open hole 5 km away and to regain well control successfully. This work also summarizes a parallel kill effort with a snubbing unit for surface intervention.
OSTI ID:
5722113
Journal Information:
Journal of Petroleum Technology; (United States), Journal Name: Journal of Petroleum Technology; (United States) Vol. 44:3; ISSN JPTJA; ISSN 0022-3522
Country of Publication:
United States
Language:
English

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