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BSI 21/30434693 DC:2021 Edition

BSI 21/30434693 DC:2021 Edition

$13.70

BS EN ISO 3421. Petroleum and natural gas industries. Drilling and production equipment. Offshore conductor design, setting depth, and installation

Published By Publication Date Number of Pages
BSI 2021 45
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This document gives requirements for the design, setting depth and installation of conductors used by the offshore petroleum and natural gas industries. This document covers:

  1. design of the conductor, i.e. determination of the diameter, wall thickness, and steel grade;

  2. determination of the setting depth for three installation methods, namely, driving, drilling/cementing, and jetting;

  3. installation requirements for the installation methods, i.e. selection principles, operating procedures and parameters.

This document is applicable to:

  1. Platform conductors: installed through a guide hole in the platform drill floor and then through guides attached to the jacket at appropriate intervals through the water column to support the conductor withstand metocean actions and prevent excessive displacements.

  2. Jack-up supported conductors: a temporary conductor used only during drilling operations, which is installed by a jack-up drilling rig. In some cases, the conductor is tensioned by tensioners attached to the drilling rig.

  3. Free-standing conductors: a self-supporting caisson in cantilever mode installed in shallow water, typically depths of about 10 m to 20 m. It provides sole support for the well and sometimes supports a small access deck and boat landing.

  4. Subsea wellhead conductors: a fully submerged conductor extending only a few metres above the seafloor.

This document does not apply to drilling risers.

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