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 Schlumberger, which provides oil field services throughout the world,
provided well logging services for the Macondo well.

 Sperry Drilling (Sperry‐Sun), a subsidiary of Halliburton that
provides drilling data systems and personnel to the drilling industry,
equipped the Deepwater Horizon with Sperry data sensors and Sperry
mudloggers to monitor and evaluate well condition data. The
Deepwater Horizon was also outfitted with Transocean paddle flow
meters to monitor flow.

 Weatherford, which provides a variety of drilling services and
components, provided the casing, casing centralizers, and float
conversion equipment used on the Deepwater Horizon.

D. The Deepwater Horizon

The Deepwater Horizon was a deepwater, column‐stabilized, semi‐
submersible DP MODU, designed to drill subsea wells for oil and gas
exploration and development. The Deepwater Horizon was built for R&B Falcon
(which later became part of Transocean) by Hyundai Heavy Industries in Ulsan,
South Korea. Construction started in December 1998, and the rig was delivered
on February 23, 2001, after Transocean acquired R&B Falcon. At the time of the
blowout, the Deepwater Horizon was registered in Majuro, Marshall Islands, and
leased to BP.

The Deepwater Horizon’s day rate at the time of the blowout was $533,495
and the rig’s total estimated daily operating costs were approximately $1
million. As is common in the industry, under its contract with BP, Transocean
20
was allowed a specific amount of time (in this case, up to twenty‐four hours per
calendar month) for mechanical downtime to perform maintenance and repairs
21
with a maximum accumulation of 12 days of downtime per year. Transocean
was not paid its day rate if the rig was not operational due to equipment repairs
for time periods beyond this allotment.
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20 TRN‐USCG_MMS‐00040941.
21 TRN‐USCG_MMS‐00040482.
22 Id.

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