Drillship

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-submersibles

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)

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

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

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

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.

Next Fleet type
AOD I Type: Jack-up
Location: Saudi Arabia/Kuwait
Availability: Jun 2019
Maximum depth: 400 feet
AOD II Type: Jack-up
Location: Saudi Arabia/Kuwait
Availability: Jun 2019
Maximum depth: 400 feet
AOD III Type: Jack-up
Location: Saudi Arabia/Kuwait
Availability: Oct 2017
Maximum depth: 400 feet
T15 Type: Tender rig
Location: Southeast Asia
Availability: Jul 2019
Maximum depth: 6,500 feet
T16 Type: Tender rig
Location: Southeast Asia
Availability: Aug 2019
Maximum depth: 6,500 feet
West Alpha Type: Semi-submersible
Location: Norway
Availability: Available
Maximum depth: 2,000 feet
West Aquarius Type: Semi-submersible
Location: Canada
Availability: Apr 2017
Maximum depth: 10,000 feet
West Aquila Type: Drillship
Location: Under construction
Availability: Under construction
Maximum depth: 12,000 feet
West Ariel Type: Jack-up
Location: West Africa
Availability: Feb 2018
Maximum depth: 400 feet
West Auriga Type: Drillship
Location: USA
Availability: Oct 2020
Maximum depth: 12,000 feet
West Callisto Type: Jack-up
Location: Saudi Arabia/Kuwait
Availability: Nov 2018
Maximum depth: 400 feet
West Capella Type: Drillship
Location: West Africa
Availability: Available
Maximum depth: 10,000 feet
West Capricorn Type: Semi-submersible
Location: USA
Availability: Jul 2019
Maximum depth: 10,000 feet
West Carina Type: Drillship
Location: Brazil
Availability: Jun 2018
Maximum depth: 12,000 feet
West Castor Type: Jack-up
Location: Southeast Asia
Availability: Dec 2019
Maximum depth: 400 feet
west courageous Type: Jack-up
Location: Mexico
Availability: Jul 2021
Maximum depth: 350 feet
West Cressida Type: Jack-up
Location: Southeast Asia
Availability: Jan 2017
Maximum depth: 375 feet
West Defender Type: Jack-up
Location: Mexico
Availability: Sep 2020
Maximum depth: 350 feet
West Dione Type: Jack-up
Location: Under construction
Availability: Under construction
Maximum depth: 400 feet
West Dorado Type: Drillship
Location: Under construction
Availability: Under construction
Maximum depth: 12,000 feet
West Draco Type: Drillship
Location: Under construction
Availability: under construction
Maximum depth: 12,000 feet
West Eclipse Type: Semi-submersible
Location: West Africa
Availability: Jun 2018
Maximum depth: 10,000 feet
West Elara Type: Jack-up
Location: Norway
Availability: Mar 2017
Maximum depth: 450 feet
West Eminence Type: Semi-submersible
Location: Spain
Availability: Available
Maximum depth: 10,000 feet
West Epsilon Type: Jack-up
Location: Norway
Availability: Dec 2016
Maximum depth: 400 feet
West Freedom Type: Jack-up
Location: Venezuela
Availability: Jul 2017
Maximum depth: 350 feet
West Gemini Type: Drillship
Location: West Africa
Availability: Oct 2017
Maximum depth: 10,000 feet
West Hercules Type: Semi-submersible
Location: Canada
Availability: Available
Maximum depth: 10,000 feet
West Hyperion Type: Jack-up
Location: Under construction
Availability: Under construction
Maximum depth: 400 feet
West Intrepid Type: Jack-up
Location: Mexico
Availability: Jan 2021
Maximum depth: 350 feet
West Jupiter Type: Drillship
Location: West Africa
Availability: Dec 2019
Maximum depth: 12,000 feet
West Leda Type: Jack-up
Location: Southeast Asia
Availability: Available
Maximum depth: 375 feet
West Leo Type: Semi-submersible
Location: West Africa
Availability: Jul 2018
Maximum depth: 10,000 feet
West Libra Type: Drillship
Location: Under construction
Availability: Under construction
Maximum depth: 12,000 feet
West Linus Type: Jack-up
Location: Norway
Availability: May 2021
Maximum depth: 450 feet
West Mimas Type: Jack-up
Location: Under construction
Availability: Under construction
Maximum depth: 400 feet
West Mischief Type: Jack-up
Location: Abu Dhabi
Availability: Dec 2017
Maximum depth: 350 feet
West Navigator Type: Drillship
Location: Norway
Availability: Available
Maximum depth: 7,500 feet
West Neptune Type: Drillship
Location: USA
Availability: Dec 2017
Maximum depth: 12,000 feet
West Oberon Type: Jack-up
Location: Mexico
Availability: May 2020
Maximum depth: 400 feet
West Orion Type: Semi-submersible
Location: Brazil
Availability: Available
Maximum depth: 10,000 feet
West Pegasus Type: Semi-submersible
Location: Mexico
Availability: Available
Maximum depth: 10,000 feet
West Phoenix Type: Semi-submersible
Location: UK
Availability: Available
Maximum depth: 10,000 feet
West Polaris Type: Drillship
Location: West Africa
Availability: Mar 2018
Maximum depth: 10,000 feet
West Prospero Type: Jack-up
Location: Southeast Asia
Availability: Available
Maximum depth: 400 feet
West Proteus Type: Jack-up
Location: Under construction
Availability: Under construction
Maximum depth: 400 feet
West Resolute Type: Jack-up
Location: Saudi Arabia/Kuwait
Availability: Available
Maximum depth: 350 feet
West Rhea Type: Jack-up
Location: Under construction
Availability: Under construction
Maximum depth: 400 feet
West Rigel Type: Semi-submersible
Location: Under construction
Availability: Under construction
Maximum depth: 10,000 feet
West Saturn Type: Drillship
Location: West Africa
Availability: Dec 2016
Maximum depth: 12,000 feet
West Sirius Type: Semi-submersible
Location: USA
Availability: Jul 2017
Maximum depth: 10,000 feet
West Taurus Type: Semi-submersible
Location: Spain
Availability: Available
Maximum depth: 10,000 feet
West Telesto Type: Jack-up
Location: Australia
Availability: Available
Maximum depth: 400 feet
West Tellus Type: Drillship
Location: Brazil
Availability: Oct 2019
Maximum depth: 12,000 feet
West Tethys Type: Jack-up
Location: Under construction
Availability: Under construction
Maximum depth: 400 feet
West Titan Type: Jack-up
Location: Under construction
Availability: Under construction
Maximum depth: 400 feet
West Titania Type: Jack-up
Location: Mexico
Availability: May 2019
Maximum depth: 400 feet
West Triton Type: Jack-up
Location: Saudi Arabia/Kuwait
Availability: Available
Maximum depth: 375 feet
West Tucana Type: Jack-up
Location: West Africa
Availability: May 2017
Maximum depth: 400 feet
West Umbriel Type: Jack-up
Location: Under construction
Availability: Under construction
Maximum depth: 400 feet
West Vela Type: Drillship
Location: USA
Availability: Nov 2020
Maximum depth: 12,000 feet
West Vencedor Type: Semi-tender
Location: Singapore
Availability: Jul 2016
Maximum depth: 6,500 feet
West Venture Type: Semi-submersible
Location: Norway
Availability: Available
Maximum depth: 2,600 feet
West Vigilant Type: Jack-up
Location: Southeast Asia
Availability: Available
Maximum depth: 350 feet

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