An analysis of drilling operation efficiency
Master thesis
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http://hdl.handle.net/11250/183587Utgivelsesdato
2011Metadata
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Originalversjon
Conf. until June 2013Sammendrag
Seadrill’s constant strive to achieve their goal in setting the standard in drilling pursues the focus on
operations excellence. The company’s fleet is expanding with frequent new Mobile Offshore Drilling
Units (MODU) and this might involve challenges with keeping up operations excellence from the first
day. In this thesis the main object is to perform operation efficiency analyzes across three of
Seadrill’s semisubmersible rigs; West Venture, West Phoenix and West Eminence. The chosen
operations for analyses are:
· Unrestricted tripping of drillpipe in cased hole
· Unrestricted running of casing into the well
· Running and pulling BOP
The analyses were based on Daily Operations Database Application (DODA) reports, which is
Seadrill’s daily operation reporting system. The reports contain specified amount of hours spent to
perform the operation and the tripping distance, and tripping rates were determined and compared
with the rigs. In the BOP operations the analyses emphasizes in addition on operation efficiency
when placing BOP on wellhead and unlatch BOP from wellhead including the related operations. The
well data are based on exploration wells, except from the first analysis which contain operations
from other wells.
Beskrivelse
Master's thesis in Petroleum engineering