Chain Train

Offshore & Marine As

Geir Ueland

Jone Mellemstrand

Odd B Skjærseth

A pulling tool for use in the placing of equipment and acquisition of data from pipes and boreholes used in the production of oil and gas. For this purpose the tool is constructed round a central, elongate, cylindrical main element () to which there are arranged radially movable links (), () and () with chains () arranged thereto, running in grooves (). Radial movement of the links is provided by subjecting a terminal element () for the links () to an axial movement by means of an actuator (). The chains () are rotated by an electric motor () transferring, through the axle () connected to the bevel gears () and (), propulsive force to the chain wheel () on which the chains () are running.

Device for a pulling tool for use in pipes and boreholes for the production of oil and gas

The invention relates to an intervention module () for well intervention operations in preferably a pressurized subsea well () with a wellhead () disposed on a water floor. The intervention module () is provided with necessary equipment to replace, under water, intervention tools () and thereby perform several well intervention operations in one run, without the supply of equipment from a surface vessel. The module () is lowered from a surface vessel and placed on the wellhead (), possibly a BOP (), of the well (). The intervention module () is connected to the surface vessel through a connecting line/hose or a wireless connection which communicates, as a minimum, necessary control and feed-back signals. The module () is provided with i.e. a rotatable tool magazine () arranged with several storage pipes () for intervention tools (), the relevant storage pipe () being rotatable into a position immediately above the well bore () of the well (), after which the intervention tool () is connected to a supply string (), whereas the storage pipe () is connected in a pressure-sealing manner to the well bore () below and a pressure safety device above, through which the supply string () is passed, so that the intervention tool () may be inserted safely into the well ().

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Sola, Norway

Geir Ueland