Rig: Valaris 8501

Name Valaris 8501
Owner Valaris PLC
Manager Valaris PLC
Rig Type Semisub
Sub Type Ultradeep Water
Jackup Type --
Max Water Depth (ft) 8500
Max Drill Depth (ft) 35000
Dimensions (ft) 310 x 225 x 96
Leg Length (ft) --
Competitive Yes

Current Location

Country --
Region --

Drilling Equipment

Drawworks Type National Oilwell Varco ADS 30Q
Drawworks HP 6000
Mud Pumps Type Lewco W-2215 Triplex
Top Drive National Oilwell Varco TDS-1000
Hookload Capacity (lbs) 2000000

Rig Construction Details

Rig Design ENSCO
Rig Model 8500
Year Built 2009
Country of Build Singapore
Yard Name Pioneer Yard I
Group Yard Name Keppel Offshore & Marine Ltd.

Rig Contract Details

Operating Status Retired


20 Jan 2015

Noble announces dry well at Madison prospect

Noble Energy has announced that it failed to discover any commercial hydrocarbons at its Madison prospect well in the US Gulf of Mexico. The well which was drilled to a total depth of 16,859 feet on Mississippi Canyon 479 has now been plugged and abandoned and the ENSCO 8501 drilling rig has been released. Noble spud the well in mid-October and had the ENSCO 8501 chartered at a rate around USD352,000 a day.

8 Jun 2009

Keppel FELS delivers 2nd 8500 SeriesĀ® semi to Ensco

Keppel FELS Limited (Keppel FELS) has delivered ENSCO 8501, the second of seven ENSCO 8500 SeriesĀ® ultra-deepwater semisubmersibles (semis) being built for a subsidiary of longtime customer, Ensco International Incorporated (NYSE:ESV) (Ensco). ENSCO 8501 is contracted for operations in the Gulf of Mexico over a period of 3 1/2 years. Keppel FELS delivered the first deepwater rig of this Series, ENSCO 8500, in September 2008.

20 Jan 2006

Keppel FELS secures repeat ultra-deepwater semisubmersible order from ENSCO

Keppel FELS Limited (Keppel FELS) has secured a repeat order for an ultra-deepwater semisubmersible drilling rig from a wholly-owned subsidiary of ENSCO International Incorporated (ENSCO). The total project value is approximately US$338 million. The semi is scheduled for delivery in the first quarter 2009. To be named ENSCO 8501, this rig is similar to the first semi, ENSCO 8500, which ENSCO ordered with Keppel FELS in September 2005. Both semis will have the capability of drilling in water depths of up to 8,500 ft, and can be readily upgraded to 10,000 ft water-depth if required. Each rig is fitted with a DPS2 dynamic positioning system, eight 2600KW thrusters and a single conventional drilling derrick system, with accommodation for up to 150 persons.

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