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Subsea 7 S.A. (stylised as Subsea7) is a Luxembourgish multinational services company involved in subsea engineering and construction serving the offshore energy industry. [4] The company is registered in Luxembourg with its headquarters in London . [ 5 ]
SS – subsea, as in a datum of depth, e.g. TVDSS (true vertical depth subsea) [citation needed] SSCC – sulphide stress corrosion cracking; SSCP – subsea cryogenic pipeline; SSCS – subsea control system; SSD – sub-sea level depth (in metres or feet, positive value in downwards direction with respect to the geoid [citation needed])
Work on the OREDA project proceeds in phases spanning 2–3 years. Handbooks summarizing the data collected and other work completed are issued regularly. [1] Phase I (1983–1985) The primary activity during this phase was the collection and compilation of offshore drilling installations, and the publication of these data in the first OREDA ...
The BOP is used to quickly disconnect the riser from the wellhead in times of emergency or in any needed situation. Underneath the derrick is a moonpool, an opening through the hull covered by the rig floor. Some of the modern drillships have larger derricks that allow dual activity operations, for example, simultaneous drilling and casing ...
Gas reinjection is the reinjection of natural gas into an underground reservoir, typically one already containing both natural gas and crude oil, in order to increase the pressure within the reservoir and thus induce the flow of crude oil or else sequester gas that cannot be exported.
Well completion is the process of making a well ready for production (or injection) after drilling operations. This principally involves preparing the bottom of the hole to the required specifications, running in the production tubing and its associated down hole tools as well as perforating and stimulating as required.
Much of the offshore seabed diving work is inspection, maintenance and repair of the blow-out preventers (BOPs) and their permanent guide bases. The primary functions of a blow-out preventer system are to confine well fluid to the wellbore, provide a way to add fluid to the wellbore and to allow controlled volumes of fluid to be withdrawn from the wellbore.
Subsea technology involves fully submerged ocean equipment, operations, or applications, especially when some distance offshore, in deep ocean waters, or on the seabed. The term subsea is frequently used in connection with oceanography, marine or ocean engineering, ocean exploration, remotely operated vehicle (ROVs) autonomous underwater vehicles (AUVs), submarine communications or power ...
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