Drillship.jpgDrillships

Drillships are self-propelled ships equipped for drilling. They keep station over the well by means of a computer-controlled thruster system known as dynamic positioning. Drillships operate in water depths in which jack-ups rigs are incapable of working and can drill in deep and ultra-deep waters.

Semi_sub_dynamically.jpgSemi-submersibles (Dynamically positioned)

Semi-submersible rigs consist of a deck containing the working areas and equipment and the living quarters, supported by a hull which consists of vertical columns connected to horizontal pontoons. Such rigs operate in a 'semi-submerged' position, with the lower hull ballasted down below the waterline. In the case of a dynamically-positioned (DP) semisub, the rig keeps station over the wellhead location by means of a computer-controlled thruster system. In the semi-submerged position, it provides a stable platform for drilling, due in part to its wave transparency characteristics at the water line. The 'generation' to which a semi sub belongs is often given - this indicates the period when the rig was built and, to a certain extent, its water depth and deck-load capabilities. The latest rigs are sixth-generation. A semi-submersible rig with DP capability can drill in conventional, deep and ultra-deep waters.

Semi_Submersibles_moored.jpgSemi-submersible (Moored)

Semi-submersible rigs consist of a deck containing the working areas and equipment and the living quarters, supported by a hull which consists of vertical columns connected to horizontal pontoons. Such rigs operate in a 'semi-submerged' position, with the lower hull ballasted down below the waterline. In the case of a dynamically-positioned (DP) semisub, the rig keeps station over the wellhead location by means of a computer-controlled thruster system. In the semi-submerged position, it provides a stable platform for drilling, due in part to its wave transparency characteristics at the water line. The 'generation' to which a semi sub belongs is often given - this indicates the period when the rig was built and, to a certain extent, its water depth and deck-load capabilities. The latest rigs are sixth-generation. A semi-submersible rig with DP capability can drill in conventional, deep and ultra-deep waters.

jack_up.jpgJack-up

Jack-up rigs are mobile, self-elevating drilling platforms equipped with tubular structure legs that are lowered to the sea floor. Tugboats tow a jack-up rig to the drill-site as a vessel, with its hull riding the sea and its leg raised. At the drill-site, the legs are lowered until they rest on the seabed and jacking continues until the hull is elevated above the surface of the water. Drilling operations can then begin. When they are completed, the hull is lowered until it rests in the water, the legs are raised and the rig can be relocated to another drill-site.

Tender_rig.jpgTender rig

Self-erecting tender rigs allow for drilling operations to be performed from a wellhead platform without the need for a permanently installed drilling package. The tender is moored next to the platform where wells are to be drilled and the modularised drilling package is lifted onto the platform. Drilling operations are supported by facilities on the tender, including storage for drilling supplies, power generation facilities for running the drilling equipment and well completion equipment. The tender also has living quarters and a helicopter deck. Tender rigs are either barge-based or have semi-submersible hulls. Both carry the same equipment, but the semi-submersible rig is able to operate in rougher weather conditions.

Semi_tender.jpgSemi-tender

Self-erecting tender rigs allow for drilling operations to be performed from a wellhead platform without the need for a permanently installed drilling package. The tender is moored next to the platform where wells are to be drilled and the modularised drilling package is lifted onto the platform. Drilling operations are supported by facilities on the tender, including storage for drilling supplies, power generation facilities for running the drilling equipment and well completion equipment. The tender also has living quarters and a helicopter deck. Tender rigs are either barge-based or have semi-submersible hulls. Both carry the same equipment, but the semi-submersible rig is able to operate in rougher weather conditions.

West Vencedor

Type Semi-tenders
Availability 2019
Technical sheet Track record

West Vela

Type Drillships
Availability 2020
Technical sheet

West Sirius

Type Semi-submersibles
Availability 2019
Technical sheet

West Polaris

Type Drillships
Availability 2021
Technical sheet

West Leo

Type Semi-submersibles
Availability 2019
Technical sheet

West Capricorn

Type Semi-submersibles
Availability 2019
Technical sheet

West Capella

Type Drillships
Availability 2020
Technical sheet Track record

West Auriga

Type Drillships
Availability 2020
Technical sheet

West Aquarius

Type Semi-submersibles
Availability 2020
Technical sheet Track record

T15

Type Tender rigs
Availability 2019
Technical sheet

T16

Type Tender rigs
Availability 2019
Technical sheet

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