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Title: Seafloor manifold center installed

Abstract

The Shell/Esso Underwater Manifold Center (UMC), designed and tested as a diverless production facility, is a significant step toward really deep water oil and gas production. In May 1982, the 2100 metric ton unit was towed 645 miles from its Dutch fabrication yard and precisely emplaced in 500 ft water in the Cormorant field in only 6 days. When fully installed with all of its wells drilled and testing completed, the UMC will have cost an estimated $700 million. During its anticipated 25 yr operating life, the UMC is expected to produce ca 110 million bbl from the central Cormorant area. Design and operational criteria are described.

Authors:
Publication Date:
OSTI Identifier:
6093257
Resource Type:
Journal Article
Resource Relation:
Journal Name: Ocean Ind.; (United States); Journal Volume: 17:7
Country of Publication:
United States
Language:
English
Subject:
02 PETROLEUM; 03 NATURAL GAS; ATLANTIC OCEAN; UNDERWATER FACILITIES; DESIGN; OPERATION; NATURAL GAS WELLS; OFFSHORE OPERATIONS; OIL WELLS; SEAS; SURFACE WATERS; WELLS 020300* -- Petroleum-- Drilling & Production; 030300 -- Natural Gas-- Drilling, Production, & Processing

Citation Formats

Edmiston, K. Seafloor manifold center installed. United States: N. p., 1982. Web.
Edmiston, K. Seafloor manifold center installed. United States.
Edmiston, K. 1982. "Seafloor manifold center installed". United States. doi:.
@article{osti_6093257,
title = {Seafloor manifold center installed},
author = {Edmiston, K.},
abstractNote = {The Shell/Esso Underwater Manifold Center (UMC), designed and tested as a diverless production facility, is a significant step toward really deep water oil and gas production. In May 1982, the 2100 metric ton unit was towed 645 miles from its Dutch fabrication yard and precisely emplaced in 500 ft water in the Cormorant field in only 6 days. When fully installed with all of its wells drilled and testing completed, the UMC will have cost an estimated $700 million. During its anticipated 25 yr operating life, the UMC is expected to produce ca 110 million bbl from the central Cormorant area. Design and operational criteria are described.},
doi = {},
journal = {Ocean Ind.; (United States)},
number = ,
volume = 17:7,
place = {United States},
year = 1982,
month = 7
}
  • The crystal spectrometer for neutron defraction installed at the Ispra-1 reactor is described. Typical diffraction patterns obtained are presented and discussed. (auth)
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  • Sometime in the summer of 1982 engineers and technicians for Shell and Esso will make the first commercial installation of a sophisticated Underwater Manifold Center (UMC) in tests until (490-ft) water in the Cormorant field of the UK North Sea sector. The subsea production system has been under development since 1974. If its promise is fulfilled, it could mean millions of additional barrels of oil can be produced commercially from small reservoirs beyond the reach of existing platforms and from marginal fields lying in deep water, sometimes in combination with floating production systems. The UMC will be capable of workingmore » in several thousand feet of water safely without diver intervention and with minimum maintenance. The underwater test project is scheduled to begin production in 1983 and continue its tests until 1986. Total cost is estimated at /700 million. During its anticipated 25-year lifetime, the UMC is expected to recover about 110 million bbls from the central Cormorant area - 20% of the field's total anticipated production.« less
  • The transition of a tokamak plasma from low ({ital L}) to high ({ital H}) confinement is investigated. The spatio-temporal behavior is analyzed using a model which is based on the reduced magnetohydrodynamic (MHD) description. The latter leads to a set of partial differential equations (PDE{close_quote}s) which are solved numerically. Analytical insight into the dynamical behavior is obtained by applying the center manifold theory (in the case of one dominating marginal mode) and an inertial manifold approximation (for several unstable modes). These procedures suggest to include an effective heating source into the equations in order to qualitatively understand the appearance ofmore » dithering cycles and edge localized modes (ELM{close_quote}s). The numerical and analytical predictions are compared with recent experimental observations. {copyright} {ital 1996 American Institute of Physics.}« less