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EXHIBIT 99.1
1
DIAMOND OFFSHORE DRILLING, INC. RIG STATUS REPORT AS OF SEPTEMBER 6, 2005
RIG NAME WD DESIGN LOCATION STATUS* OPERATOR CURRENT TERM
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DOMESTIC DEEPWATER SEMISUBMERSIBLES (6)
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Ocean Quest 3,500' Victory Class GOM Contracted Noble term
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Ocean Star 5,500' Victory Class GOM Contracted Kerr-McGee 90 day term extension
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Ocean America 5,500' Ocean Odyssey GOM Contracted Pioneer three wells
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Ocean Valiant 5,500' Ocean Odyssey GOM Contracted Kerr-McGee one well
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Ocean Victory 5,500' Victory Class GOM Contracted Kerr-McGee one well
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DP Aker H-3.2
Ocean Confidence 7,500' Modified GOM Contracted BP five-year term
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DOMESTIC 2ND/3RD GENERATION SEMISUBMERSIBLES (5)
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Ocean New Era 1,500' Korkut GOM Reactivating DODI -
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Ocean Voyager 2,000' Victory Class GOM Contracted ATP two wells
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Ocean Concord 2,200' F&G SS-2000 GOM Contracted Kerr-McGee one well
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Ocean Lexington 2,200' F&G SS-2000 GOM Shipyard DODI -
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Ocean Saratoga 2,200' F&G SS-2000 GOM Contracted LLOG three wells
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<Table>
<Caption>
RIG NAME DAYRATE (000S) START DATE EST. END DATE FUTURE CONTRACTS AND OTHER INFORMATION
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DOMESTIC DEEPWATER SEMISUBMERSIBLES (6)
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Ocean Quest mid 120's mid June 2005 mid Oct. 2005 Assessing damage from hurricane Katrina.
Preliminary repair estimate two weeks.
Six-month term extension plus option in
the low 240's beginning in mid Oct. 2005
and ending in mid April 2006. Available;
actively marketing.
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Ocean Star low 140's mid July 2005 mid Oct. 2005 12 month extension with Kerr-McGee in
mid 170's beginning mid Oct. 2005 and
ending mid Oct. 2006. Available;
actively marketing.
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Ocean America low 150's early May 2005 late Nov. 2005 Following assignment wells with Pioneer,
second of two extension wells with
Mariner in low 130's beginning late Nov.
2005 and ending late Jan. 2006; followed
by one additional extension well with
Mariner in mid 110's beginning early
Jan. and ending mid Mar. 2006: followed
by one year term plus option with
Mariner in low 230's beginning mid Mar.
2006 and ending mid Mar. 2007.
Available; actively marketing.
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Ocean Valiant low 130's late June 2005 mid Sept. 2005 180 day term extension with Kerr-McGee
in low 150's beginning mid Sept. 2005
and ending mid Mar. 2006; followed by
one-year term extension plus option from
Kerr-McGee in low 300,000's beginning in
mid Mar. 2006 and ending in mid Mar.
2007. Available; actively marketing.
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Ocean Victory mid 180's late Aug. 2005 mid Oct. 2005 One year term with Murphy in low 200's
beginning mid Oct. 2005 and ending mid
Oct. 2006. Available; actively
marketing.
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Ocean Confidence mid 170's early Jan. 2001 early Jan. 2006 Two-year term plus option with BP in low
280's beginning early Jan. 2006 and
ending early Jan. 2008. Available;
actively marketing.
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DOMESTIC 2ND/3RD GENERATION SEMISUBMERSIBLES (5)
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Ocean New Era - - - Est. availability late Nov. 2005;
followed by six-month term with Walter
in low 100's for first 30 days and mid
120's for remainder of term beginning
late Nov. 2005 and ending late May 2006.
Available; actively marketing.
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Ocean Voyager mid 90's late June 2005 early Nov. 2005 Assessing damage from hurricane Katrina.
Preliminary repair estimate four to
eight weeks. One well with Amerada Hess
in low 110's beginning early Nov. and
ending late Dec.; followed by LOI for
one well in low 110's beginning late
Dec. 2005 and ending mid Feb. 2006;
followed by two wells plus option with
Amerada Hess in mid 120's beginning mid
Feb. 2006 and ending mid May 2006.
Available; actively marketing.
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Ocean Concord mid 70's late Aug. 2005 mid Dec. 2005 One assignment well from Kerr-McGee with
Woodside in mid 90's beginning mid Dec.
2005 and ending late Jan. 2006; followed
by one well extension plus option with
Kerr-McGee in mid 90's beginning late
Jan. 2006 and ending early Mar.;
followed by 90-day term plus option with
Tana in low 130's beginning early Mar.
and ending early June 2006; followed by
90-day term extension plus option in low
170's beginning early June and ending
late Aug 2006. Available; actively
marketing.
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Ocean Lexington - - late Sept. 2005 Approximately 120-day Survey and
maintenance between second and third
well, beginning late May and ending late
Sept. Following survey, two additional
wells with Walter in low 60's beginning
late Sept. and ending late Nov.;
followed by LOI for one well in mid
170's beginning in late Nov. 2005 and
ending in mid Jan. 2006; followed by one
well plus option with Walter in low 80's
beginning mid Jan. and ending mid Feb.
2006. Available; actively marketing.
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Ocean Saratoga mid 60's mid Dec. 2004 mid Sept. 2005 Two wells plus option with LLOG in low
110's beginning mid Sept. 2005 and
ending mid Feb. 2006; followed by six
month extension with LLOG in low 120's
beginning mid Feb. 2006 and ending mid
Aug. 2006. Available; actively
marketing.
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2
DIAMOND OFFSHORE DRILLING, INC. RIG STATUS REPORT AS OF SEPTEMBER 6, 2005
RIG NAME WD DESIGN LOCATION STATUS* OPERATOR CURRENT TERM
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DOMESTIC JACKUPS (12)
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Ocean Crusader 200' Mat Cantilever GOM Contracted Seneca two wells
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Ocean Drake 200' Mat Cantilever GOM Contracted Chevron term contract
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Ocean Champion 250' Mat Slot GOM Contracted Hunt two well extension
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Ocean Columbia 250' Independent Leg
Cantilever GOM Contracted Newfield 180-day term
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Ocean Spartan 300' Independent Leg
Cantilever GOM Contracted LLOG three wells plus option
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Ocean Spur 300' Independent Leg
Cantilever GOM Contracted EOG one well
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Ocean King 300' Independent Leg
Cantilever GOM Contracted El Paso one well extension
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Ocean Nugget 300' Independent Leg
Cantilever GOM Contracted Houston Expl. two wells plus option
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Ocean Summit 300' Independent Leg
Cantilever GOM Contracted LLOG one well extension
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Ocean Warwick 300' Independent Leg
Cantilever GOM Contracted Chevron -
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Ocean Titan 350' Independent Leg
Cantilever GOM Contracted BHP one well plus option
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Ocean Tower 350' Independent Leg
Cantilever GOM Contracted Chevron one well
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RIG NAME DAYRATE (000S) START DATE EST. END DATE FUTURE CONTRACTS AND OTHER INFORMATION
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DOMESTIC JACKUPS (12)
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Ocean Crusader high 40's late Aug. 2005 late Oct. 2005 Available; actively marketing.
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Ocean Drake low 60's late July 2005 late June 2006 Indexed term contract. Available;
actively marketing.
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Ocean Champion low 50's late Aug. 2005 late Oct. 2005 LOI for six-month term in mid 50's
beginning late Oct. 2005 and ending late
April 2006. Available; actively
marketing.
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Ocean Columbia mid 50's early Aug. 2005 late Jan. 2006 Available; actively marketing.
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Ocean Spartan high 50's late June 2005 late Sept. 2005 Two well extension plus option in mid
80's beginning late Sept. and ending
late Nov. 2005. Available; actively
marketing.
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Ocean Spur mid 60's late Aug. 2005 mid Oct. 2005 Available; actively marketing.
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Ocean King mid 50's late June 2005 mid Sept. 2005 One well with El Paso in mid 60's
beginning late Aug. and ending mid
Sept.; followed by one well extension in
low 60's beginning mid Sept. and ending
early Oct. 2005; followed by one well
with Walter in high 60's beginning early
Oct. and ending early Nov. 2005.
Available; actively marketing.
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Ocean Nugget high 60's early Sept. 2005 late Oct. 2005 Available; actively marketing.
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Ocean Summit mid 60's late June 2005 mid Sept. 2005 Available; actively marketing.
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Ocean Warwick - - - Assessing damage from hurricane Katrina.
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Ocean Titan mid 50's late Jan. 2005 mid Sept. 2005 Three wells with Walter in mid 70's
beginning mid Sept. and ending mid Dec.
2005; followed by six-month term with
Dominion Exploration in high 70's
beginning mid Dec. 2005 and ending mid
June 2006. Available; actively
marketing.
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Ocean Tower mid 50's early Aug. 2005 mid Sept. 2005 180-day term extension plus option with
Chevron (Part I) in high 60's beginning
mid Sept. and ending mid Dec.; followed
by Part II in high 80's beginning mid
Dec. 2005 and ending mid Mar. 2006.
Available; actively marketing.
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3
DIAMOND OFFSHORE DRILLING, INC. RIG STATUS REPORT AS OF SEPTEMBER 6, 2005
RIG NAME WD DESIGN LOCATION STATUS* OPERATOR CURRENT TERM
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INTERNATIONAL SEMISUBMERSIBLES (17)
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MEXICO
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Ocean Ambassador 1,100' Bethlehem SS-2000 GOM Contracted PEMEX four year term work
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Ocean Whittington 1,500' Aker H-3 GOM Contracted PEMEX four year term work
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Ocean Worker 3,500' F&G 9500 Enhanced Pacesetter GOM Contracted PEMEX four year term work
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Ocean Yorktown 2,850' F&G SS-2000 GOM Contracted PEMEX four year term work
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NORTH SEA
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Ocean Nomad 1,200' Aker H-3 North Sea Contracted Talisman one year
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Ocean Guardian 1,500' Earl & Wright Sedco 711 Series North Sea Contracted Shell one year
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Ocean Princess 1,500' Aker H-3 North Sea Contracted Talisman one year extension
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Ocean Vanguard 1,500' Bingo 3000 North Sea Contracted Statoil one year term
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AUSTRALASIA
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Ocean Bounty 1,500' Victory Class Australia Contracted ConocoPhillips two wells
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Ocean Patriot 1,500' Bingo 3000 Australia Contracted Anzon one well
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Ocean Epoch 1,640' Korkut Malaysia Contracted Murphy six wells plus option
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Ocean General 1,640' Korkut Malaysia Contracted CTOC six wells
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Ocean Baroness 7,000' Victory Class Singapore Shipyard DODI -
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Ocean Rover 7,000' Victory Class Malaysia Contracted Murphy 950 day extension
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</Table>
RIG NAME DAYRATE (000S) START DATE EST. END DATE FUTURE CONTRACTS AND OTHER INFORMATION
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INTERNATIONAL SEMISUBMERSIBLES (17)
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MEXICO
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Ocean Ambassador mid 50's late July 2003 mid Dec. 2007 Available.
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Ocean Whittington low 60's late July 2003 early Oct. 2006 Available.
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Ocean Worker high 60's mid Aug. 2003 late July 2007 Available.
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Ocean Yorktown mid 40's late Oct. 2003 mid July 2007 Available.
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NORTH SEA
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One year extension with Talisman in mid 150's
beginning late Jan. 2006 and ending late Jan. 2007.
Ocean Nomad low 80's early Jan. 2005 late Jan. 2006 Available; actively marketing.
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One-year term extension plus option with Shell in
low 160's beginning late Mar. 2006 and ending late
Mar. 2007. (40-day survey Q3, 2005).
Ocean Guardian low 80's late Mar. 2005 late Mar. 2006 Available; actively marketing.
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Two year extension with Talisman plus option in low
150's beginning in late Dec. 2005 and ending in
Ocean Princess low 80's early Jan. 2005 late Dec. 2005 late Dec. 2007. Available; actively marketing.
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One year plus option program in Norway with Statoil
in low 140's beginning in late May 2005 and ending
in early Sept. 2006 (time period to include one
well redrill with ENI in low 140's beginning late
July and ending late Oct. 2005). Available;
Ocean Vanguard low 140's late May 2005 early Sept. 2006 actively marketing.
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AUSTRALASIA
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One well with Coogee Res. in mid 80's beginning mid
Oct. and ending mid Nov.; followed by two wells
plus option with Coogee in low 90's beginning mid
Nov. 2005. and ending mid Jan. 2006; followed by
LOI for one well plus option in mid 90's beginning
mid Jan. and ending mid Mar.; followed by four
wells plus option in high 90's with Woodside
beginning mid Mar. 2006 and ending mid Sept. 2006.
Ocean Bounty mid 80's late June 2005 mid Oct. 2005 Available; actively marketing.
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One well with Bass Straits in high 70's, early
Sept.-mid Sept.; followed by one well with Bass
Straits in high 130's, mid Sept.-late Sept.;
followed by one well with Apache in high 70's, late
Sept.-mid Oct.; followed by one assignmnet well
with Nexus in low 150's, mid Oct.-late Dec. 2005;
followed by 10-day survey ending mid-Jan. 2006;
followed by first of four Anzon options in mid
130's, mid Jan. 2006-mid Feb.; followed by second
of four Anzon options in upper 130's, mid Feb.-mid
Mar.; followed by third and fourth of four options
in low 140's, mid Mar.-mid May; followed by one
exercised assignment option well from Apache with
Nexus in high 70's, mid May-mid June; followed by
LOI for one assignment well in low 200,000's, mid
June-late July; followed by four wells plus option
with NZOP in low 100's, late July-late Dec. 2006.
Ocean Patriot high 70's late July 2005 late Sept. 2005 Available; actively marketing.
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Three option wells exercised in mid 70's beginning
in mid Dec. 2005 and ending in late Mar. 2006; five
option wells remain available. Available; actively
Ocean Epoch mid 70's late April 2005 mid Dec. 2005 marketing.
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Note: 5th & 6th wells in mid 90's beginning early
Nov. 2005 and ending mid Jan. 2006; followed by one
well plus two option wells with Premier in high
70's in Viet Nam beginning mid Jan. 2006 and ending
mid Mar. 2006; followed by LOI for three wells plus
three options wells in mid 130's beginning mid Mar.
2006 and ending mid Sept. 2006. Available; actively
Ocean General mid 70's mid June 2005 mid Jan. 2006 marketing.
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Shipyard/survey early June until late Aug. Mobe to
GOM and prep for one year plus option with Amerada
Hess in low 200's beginning early Nov. 2005 and
ending early Nov. 2006. Available; actively
Ocean Baroness - - - marketing.
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Ocean Rover mid 170's late June 2005 mid Jan. 2008 Available; actively marketing.
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</Table>
4
DIAMOND OFFSHORE DRILLING, INC. RIG STATUS REPORT AS OF SEPTEMBER 6, 2005
RIG NAME WD DESIGN LOCATION STATUS* OPERATOR CURRENT TERM
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BRAZIL
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DP DYVI Super
Ocean Yatzy 3,300' Yatzy Brazil Contracted Petrobras 700 day extension
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Ocean Winner 3,500' Aker H-3 Brazil Contracted Petrobras 700 day extension
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Ocean Alliance 5,000' Alliance Class Brazil Contracted Petrobras four year extension
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INTERNATIONAL DRILLSHIPS (1)
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Ocean Clipper 7,500' DP Fluor/
Mitsubishi Brazil Contracted Petrobras 700 day extension
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INTERNATIONAL JACKUPS (2)
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Ocean Sovereign 250' Independent Leg
Cantilever Indonesia Contracted Santos eight wells
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Ocean Heritage 300' Independent Leg
Cantilever Qatar Contracted Conoco/Phillips two wells plus option
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UPGRADE (1)
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Ocean Endeavor 2,000' Victory Class Shipyard Upgrading DODI -
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COLD STACKED--RESERVED FOR UPGRADE (1)
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Garden Banks** 2,200' Victory Class GOM Out of Service - -
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RIGS UNDER CONSTRUCTION (2)
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Ocean Shield 350' Independent Leg
Cantilever Shipyard - - -
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Ocean Scepter 350' Independent Leg
Cantilever Shipyard - - -
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RIG NAME DAYRATE (000S) START DATE EST. END DATE FUTURE CONTRACTS AND OTHER INFORMATION
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BRAZIL
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Ocean Yatzy mid 70's early Nov. 2003 early Oct. 2005 Four-year term extension with Petrobras
in mid 110's, plus potential bonus,
beginning early Oct. 2005 and ending
early Oct. 2009. (21-day maintenance Q3
or Q4). Available.
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Ocean Winner mid 50's early April 2004 mid Mar. 2006 Four-year term extension with Petrobras
in low 110's, plus potential bonus,
beginning mid Mar. 2006 and ending mid
Mar. 2010. Available.
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Ocean Alliance mid 150's early Sept. 2005 early Sept. 2009 Available.
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INTERNATIONAL DRILLSHIPS (1)
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Ocean Clipper low 100's early Jan. 2003 mid Dec. 2005 Five-year term extension with Petrobras
in low 180's, plus potential bonus,
beginning mid Dec. 2005 and ending mid
Dec. 2010. Available.
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INTERNATIONAL JACKUPS (2)
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Ocean Sovereign upper 60's early May 2005 late Oct. 2005 Two wells with Amerada Hess plus two
exercised option wells in mid 80's
beginning late Oct. and ending mid Dec.
2005; followed by two option wells with
Santos in mid 70's beginning mid Dec.
2005 and ending mid Mar. 2006; followed
by three wells with Santos in upper 60's
beginning mid Mar. and ending mid May;
followed by two wells with Anadarko in
mid 80's beginning mid May and ending
early July 2006. Available; actively
marketing.
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Ocean Heritage low 70's mid June 2005 late Mar. 2006 Available; actively marketing.
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UPGRADE (1)
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Ocean Endeavor - - - Singapore shipyard for upgrade to 10,000
ft. capable 5th Generation rig.
Estimated completion early 2007;
followed by commissioning beginning
early Mar. 2007; followed by LOI for a
term of between two and four years
earning approximate total revenue of
between $198 million and $355 million
depending upon the length of the
contract selected by the operator no
later than year-end 2005. Contract is
expected to begin mid 2007. Available;
actively marketing.
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COLD STACKED--RESERVED FOR UPGRADE
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Garden Banks** - - - Currently retired from active service as
drilling and production platform.
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RIGS UNDER CONSTRUCTION (2)
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Ocean Shield - - - Singapore shipyard, estimated completion
Q1 2008. Available; actively marketing.
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Ocean Scepter - - - Brownsville shipyard, estimated
completion Q1 2008. Available; actively
marketing.
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NOTES:
* GENERALLY, RIG UTILIZATION RATES APPROACH 95-98% DURING CONTRACTED PERIODS;
HOWEVER, UTILIZATION RATES CAN BE ADVERSELY IMPACTED BY ADDITIONAL DOWNTIME DUE
TO UNSCHEDULED REPAIRS AND MAINTENANCE, WEATHER CONDITIONS AND OTHER FACTORS.
**DIAMOND OFFSHORE SERVICES COMPANY COMPLETED PURCHASE OF THE GARDEN BANKS ON
AUGUST 25, 2005.
GOM = Gulf of Mexico