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Title: Troll oil pipeline: Advanced landfall solution at Mongstad

Abstract

The landfall of the 16-in. Troll Oil Pipeline is achieved by means of a 30-in. cased borehole routed through hard metamorphic rock using up-to-date technology for drilling, down hole directional control and path survey. The borehole, which extends over a total length of 760 m, starts in a clear area inside the Mongstad Refinery and pierces in the lowermost part of Fensfjord`s southern steep sided cliff at 314 m water depth. The deep waters at th4e offshore end required completely diverless operations. Pipeline installation inside the borehole was carried out as part of the pipelay start-up with the aid of an onshore located pull-in winch. Main topics faced during the design and the adopted technical solutions are presented, notably: borehole route and size; borehole approach route and intervention works, corrosion protection system; and auxiliary devices such as the bellmouth at the offshore end and the anchor block at the onshore end. Experience feedback from construction activities is discussed focusing on technology performance, contingencies and remedial actions.

Authors:
 [1];  [2]; ;  [3]
  1. Snamprogetti S.p.A., Fano (Italy)
  2. Universale Bau, Munich (Germany)
  3. Statoil, Stavanger (Norway)
Publication Date:
OSTI Identifier:
400910
Report Number(s):
CONF-9606279-
ISBN 0-7918-1494-7; TRN: IM9650%%316
Resource Type:
Conference
Resource Relation:
Conference: 14. international conference on offshore mechanics arctic engineering (OMAE), Florence (Italy), 16-20 Jun 1996; Other Information: PBD: 1996; Related Information: Is Part Of OMAE 1996 -- Proceedings of the 15. international conference on offshore mechanics and arctic engineering. Volume 5: Pipeline technology; Murray, A. [ed.] [Nova Gas Transmission, Calgary, Alberta (Canada)]; Bruschi, R. [ed.] [Snamprogetti, S.p.A., Fano (Italy)]; PB: 612 p.
Country of Publication:
United States
Language:
English
Subject:
02 PETROLEUM; NORWAY; PIPELINES; DESIGN; INSTALLATION; PETROLEUM; TRANSPORT; DIRECTIONAL DRILLING; PETROLEUM REFINERIES; CONTINENTAL SHELF; TECHNOLOGY UTILIZATION; EQUIPMENT PROTECTION DEVICES

Citation Formats

Sintini, G L, Bernardi, M, Doerheim, M K, and Kjosavik, J K. Troll oil pipeline: Advanced landfall solution at Mongstad. United States: N. p., 1996. Web.
Sintini, G L, Bernardi, M, Doerheim, M K, & Kjosavik, J K. Troll oil pipeline: Advanced landfall solution at Mongstad. United States.
Sintini, G L, Bernardi, M, Doerheim, M K, and Kjosavik, J K. 1996. "Troll oil pipeline: Advanced landfall solution at Mongstad". United States.
@article{osti_400910,
title = {Troll oil pipeline: Advanced landfall solution at Mongstad},
author = {Sintini, G L and Bernardi, M and Doerheim, M K and Kjosavik, J K},
abstractNote = {The landfall of the 16-in. Troll Oil Pipeline is achieved by means of a 30-in. cased borehole routed through hard metamorphic rock using up-to-date technology for drilling, down hole directional control and path survey. The borehole, which extends over a total length of 760 m, starts in a clear area inside the Mongstad Refinery and pierces in the lowermost part of Fensfjord`s southern steep sided cliff at 314 m water depth. The deep waters at th4e offshore end required completely diverless operations. Pipeline installation inside the borehole was carried out as part of the pipelay start-up with the aid of an onshore located pull-in winch. Main topics faced during the design and the adopted technical solutions are presented, notably: borehole route and size; borehole approach route and intervention works, corrosion protection system; and auxiliary devices such as the bellmouth at the offshore end and the anchor block at the onshore end. Experience feedback from construction activities is discussed focusing on technology performance, contingencies and remedial actions.},
doi = {},
url = {https://www.osti.gov/biblio/400910}, journal = {},
number = ,
volume = ,
place = {United States},
year = {Sun Dec 01 00:00:00 EST 1996},
month = {Sun Dec 01 00:00:00 EST 1996}
}

Conference:
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