Fmc Kongsberg Subsea As

Trond Løkka

Tor-Øystein Carlsen

Oddbjørn Aase

Scott Hamilton

A remotely operated subsea well completion system, which comprises local storage () of hydraulic energy and feedthroughs in a BOP () or a marine riser (), has the object of installing or pulling a production tubing and its tubing hanger without using an umbilical within a marine riser. The system consists of an internal control module (), which comprises hydraulic accumulators (), a liquid divider (), control valves (), an electric control module (), as well as one or more transmitters/receivers () for communication to an external control unit (). The communication may be through acoustic feedthroughs in existing choke, kill or booster ports.

System for remote operation of downhole well equipment

The invention relates to a tool and associated method for making closed operation in subsea wells possible, without the use of cable or coiled tubing up to the rig or ship. The object of this solution is to move such operations to lighter and more cost efficient vessels or ships which are not necessarily required to handle hydrocarbons up to the deck of the vessel. The basis of maintaining two independent well barrier envelopes is met even if the tool and the method for operation does not require cutting functions for isolating the well from the environment. The tool comprises a hoist arrangement, a seal element and connection points. The localization and arrangement of these are essential for the invention. The invention also adapts for use of traditional workover systems as alternative, independent operation, if the new technique should not complete the operation as planned.

Tool and method for closed operation in a subsea well

A closed operation subsea well tool assembly with a flushing system flushing a first fluid in the main bore () of the tool assembly (). The flushing system of the tool assembly comprises a container () with a second fluid, a pump (), a swab valve () in the top of the main bore (), an inlet () in the bottom of the main bore of the tool assembly, which is connected to the pump. Outlet(s) () are below the swab valve, configured to guide out the first fluid from the main bore. A fluid channel () extends from the outlet () and down to channels of the wellhead module () or the wellhead (). Methods using the tool assembly are also disclosed.

Flushing a tool for closed well operation and an associated method

A subsea connection includes an umbilical termination head having a termination head housing and at least one first connecting line, each of which has a first mating device; a subsea base unit having a base unit housing and at least one second connecting line, each of which has a second mating device that is connectable with a corresponding first mating device; and a locking device for locking the termination head to the subsea base unit. The second mating device is fixed to a stab plate and kept in a retracted position before connection of the termination head with the base unit, and the stab plate and the second mating device are arranged to move relative to the base unit housing during connection.

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Notodden, Norway

Trond Løkka