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1
Exhibit 99.1

DIAMOND OFFSHORE DRILLING, INC. RIG STATUS REPORT AS OF SEPTEMBER 27, 2005

Ocean Quest 3,500' Victory Class GOM Contracted Noble term mid 120's
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Ocean Star 5,500' Victory Class GOM Contracted Kerr-McGee 90 day term extension low 140's
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Ocean America 5,500' Ocean Odyssey GOM Contracted Pioneer three wells low 150's
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Ocean Valiant 5,500' Ocean Odyssey GOM Contracted Kerr-McGee 180 day extension mid 150's
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Ocean Victory 5,500' Victory Class GOM Contracted Kerr-McGee one well mid 180's
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DP Aker H-3.2
Ocean Confidence 7,500' Modified GOM Contracted BP five-year term mid 170's
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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 mid 90's
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Ocean Concord 2,200' F&G SS-2000 GOM Contracted Kerr-McGee one well mid 70's
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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 mid 60's
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START DATE EST. END DATE FUTURE CONTRACTS AND OTHER INFORMATION
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Expected return to work early Oct. Six-month term extension
plus option in the low 240's beginning in mid Oct. 2005 and
mid June 2005 mid Oct. 2005 ending in mid April 2006. Available; actively marketing.
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Assessing damage from Hurricane Rita. 12 month extension
with Kerr-McGee in mid 170's beginning after repair and
completion of existing contract and extending for one year.
mid July 2005 mid Oct. 2005 Available; actively marketing.
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Following assignment wells with Pioneer, second of two
extension wells with Mariner in low 130's beginning late
Dec. 2005 and ending mid Feb. 2006; followed by one
additional extension well with Mariner in mid 110's
beginning mid Feb. and ending early April 2006: followed by
one year term plus option with Mariner in low 230's
beginning early April 2006 and ending early April 2007.
early May 2005 late Dec. 2005 Available; actively marketing.
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One-year term extension plus option from Kerr-McGee in low
300,000's beginning in mid Mar. 2006 and ending in mid Mar.
mid Sept. 2005 mid Mar. 2006 2007. Available; actively marketing.
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One year term with Murphy in low 200's beginning mid Oct.
2005 and ending mid Oct. 2006. Available; actively
late Aug. 2005 mid Oct. 2005 marketing.
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Two-year term plus option with BP in low 280's beginning
early Jan. 2006 and ending early Jan. 2008. Available;
early Jan. 2001 early Jan. 2006 actively marketing.
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Est. availability early Dec. 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 early Dec. 2005 and
- - ending early June 2006. Available; actively marketing.
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Hurricane Katrina repair estimate four to eight weeks. One
well with Amerada Hess in low 110's beginning mid Nov. and
ending early Jan. 2006; followed by LOI for one well in low
110's beginning late early Jan. and ending late Feb. 2006;
followed by two wells plus option with Amerada Hess in mid
120's beginning late Feb. 2006 and ending late May 2006.
late June 2005 mid Nov. 2005 Available; actively marketing.
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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
late Aug. 2005 mid Dec. 2005 marketing.
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Approximately 120-day Survey and maintenance between second
and third well, beginning late May and ending early Oct.
Following survey, two additional wells with Walter in low
60's beginning early Oct. and ending early Dec.; followed by
LOI for one well in mid 170's beginning in early Dec. 2005
and ending in late Jan. 2006; followed by one well plus
option with Walter in low 80's beginning late Jan. and
- early Oct. 2005 ending late Feb. 2006. Available; actively marketing.
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Assessing damage from Hurricane Rita. Two wells plus option
with LLOG in low 110's following repair and completion of
existing contract and extending for approximately five
months; followed by six month extension with LLOG in low
mid Dec. 2004 late Sept. 2005 120's. Available; actively marketing.
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DIAMOND OFFSHORE DRILLING, INC. RIG STATUS REPORT AS OF SEPTEMBER 27, 2005

DAYRATE
RIG NAME WD DESIGN LOCATION STATUS* OPERATOR CURRENT TERM (000S)
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DOMESTIC JACKUPS (12)
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Ocean Crusader 200' Mat Cantilever GOM Contracted Seneca two wells high 40's
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Ocean Drake 200' Mat Cantilever GOM Contracted Chevron term contract low 60's
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Ocean Champion 250' Mat Slot GOM Contracted Hunt two well extension low 50's
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Ocean Columbia 250' Independent Leg Cantilever GOM Contracted Newfield 180-day term mid 50's
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Ocean Spartan 300' Independent Leg Cantilever GOM Contracted LLOG three wells plus option high 50's
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Ocean Spur 300' Independent Leg Cantilever GOM Contracted EOG one well mid 60's
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Ocean King 300' Independent Leg Cantilever GOM Contracted El Paso one well extension mid 50's
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Ocean Nugget 300' Independent Leg Cantilever GOM Contracted Houston Expl. two wells plus option high 60's
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Ocean Summit 300' Independent Leg Cantilever GOM Contracted LLOG one well extension mid 60's
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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 Walter three wells mid 70's
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Ocean Tower 350' Independent Leg Cantilever GOM Contracted Chevron one well mid 50's
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START DATE EST. END DATE FUTURE CONTRACTS AND OTHER INFORMATION
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late Aug. 2005 late Oct. 2005 Available; actively marketing.
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late July 2005 late June 2006 Indexed term contract. Available; actively marketing.
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Six-month term with Stone Energy in mid 50's beginning late
Nov. 2005 and ending mid May 2006. Available; actively
late Aug. 2005 late Nov. 2005 marketing.
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early Aug. 2005 late Jan. 2006 Available; actively marketing.
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Two well extension plus option in mid 80's beginning late
Sept. and ending late Nov. 2005. Available; actively
late June 2005 late Sept. 2005 marketing.
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late Aug. 2005 mid Oct. 2005 Available; actively marketing.
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One well with El Paso in mid 60's beginning late Aug. and
ending late Sept.; followed by one well extension in low
60's beginning late Sept. and ending mid Oct. 2005; followed
by one well with Forest in mid 70's beginning early Nov. and
late June 2005 late Sept. 2005 ending late Dec. 2005. Available; actively marketing.
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early Sept. 2005 late Oct. 2005 Available; actively marketing.
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One well with Walter in upper 60's beginning mid Oct. and
late June 2005 mid Oct. 2005 ending mid Nov. 2005. Available; actively marketing.
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- - Assessing damage from hurricanes Katrina and Rita.
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Six-month term with Dominion Exploration in high 70's
beginning mid Jan. 2006 and ending mid July 2006. Available;
mid Sept. 2005 mid Jan. 2006 actively marketing.
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180-day term extension plus option with Chevron (Part I) in
high 60's beginning late Sept. and ending late Dec.;
followed by Part II in high 80's beginning late Dec. 2005
early Aug. 2005 late Sept. 2005 and ending late Mar. 2006. Available; actively marketing.
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DIAMOND OFFSHORE DRILLING, INC. RIG STATUS REPORT AS OF SEPTEMBER 27, 2005

DAYRATE
RIG NAME WD DESIGN LOCATION STATUS* OPERATOR CURRENT TERM (000S)
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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 mid 50's
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Ocean Whittington 1,500' Aker H-3 GOM Contracted PEMEX four year term work low 60's
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F&G 9500 Enhanced
Ocean Worker 3,500' Pacesetter GOM Contracted PEMEX four year term work high 60's
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Ocean Yorktown 2,850' F&G SS-2000 GOM Contracted PEMEX four year term work mid 40's
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NORTH SEA
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Ocean Nomad 1,200' Aker H-3 North Sea Contracted Talisman one year low 80's
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Earl & Wright Sedco
Ocean Guardian 1,500' 711 Series North Sea Contracted Shell one year low 80's
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Ocean Princess 1,500' Aker H-3 North Sea Contracted Talisman one year extension low 80's
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Ocean Vanguard 1,500' Bingo 3000 North Sea Contracted Statoil one year term low 140's
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AUSTRALASIA
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Ocean Bounty 1,500' Victory Class Australia Contracted ConocoPhillips two wells mid 80's
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Ocean Patriot 1,500' Bingo 3000 Australia Contracted Anzon one well high 70's
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Ocean Epoch 1,640' Korkut Malaysia Contracted Murphy six wells plus option mid 70's
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Ocean General 1,640' Korkut Malaysia Contracted CTOC six wells mid 70's
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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 mid 170's
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START DATE EST. END DATE FUTURE CONTRACTS AND OTHER INFORMATION
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late July 2003 mid Dec. 2007 Available.
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late July 2003 early Oct. 2006 Available.
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mid Aug. 2003 late July 2007 Available.
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late Oct. 2003 mid July 2007 Available.
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One year extension with Talisman in mid 150's beginning late
Jan. 2006 and ending late Jan. 2007. Available; actively
early Jan. 2005 late Jan. 2006 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
late Mar. 2005 late Mar. 2006 survey Q3, 2005). 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 late Dec. 2007.
early Jan. 2005 late Dec. 2005 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).
late May 2005 early Sept. 2006 Available; actively marketing.
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One well with Coogee Res. in mid 80's beginning early Nov.
and ending early Dec.; followed by two wells plus option
with Coogee in low 90's beginning early Dec. 2005. and
ending mid Feb. 2006; followed by LOI for one well plus
option in mid 90's beginning mid Mar. and ending mid May.;
followed by four wells plus option in high 90's with
Woodside beginning mid May. 2006 and ending early Nov. 2006.
late June 2005 early Nov. 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 2005 late Sept. 2005 late July-late Dec. 2006. 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
late April 2005 mid Dec. 2005 remain available. Available; actively 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
mid June 2005 mid Jan. 2006 marketing.
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Under mobe to GOM for one year plus option with Amerada Hess
in low 200's beginning early Nov. 2005 and ending early Nov.
- - 2006. Available; actively marketing.
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late June 2005 mid Jan. 2008 Available; actively marketing.
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DIAMOND OFFSHORE DRILLING, INC. RIG STATUS REPORT AS OF SEPTEMBER 27, 2005

Ocean Yatzy 3,300' DP DYVI Super Yatzy Brazil Contracted Petrobras 700 day extension mid 70's
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Ocean Winner 3,500' Aker H-3 Brazil Contracted Petrobras 700 day extension mid 50's
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Ocean Alliance 5,000' Alliance Class Brazil Contracted Petrobras four year extension mid 150's
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INTERNATIONAL DRILLSHIPS (1)
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Ocean Clipper 7,500' DP Fluor/Mitsubishi Brazil Contracted Petrobras 700 day extension low 100's
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INTERNATIONAL JACKUPS (2)
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Ocean Sovereign 250' Independent Leg Cantilever Indonesia Contracted Santos eight wells upper 60's
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Ocean Heritage 300' Independent Leg Cantilever Qatar Contracted Conoco/Phillips two wells plus option low 70's
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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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START DATE EST. END DATE FUTURE CONTRACTS AND OTHER INFORMATION
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Four-year term extension with Petrobras in mid 110's, plus
potential bonus, beginning early Oct. 2005 and ending early
early Nov. 2003 early Oct. 2005 Oct. 2009. (21-day maintenance Q3 or Q4). Available.
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Four-year term extension with Petrobras in low 110's, plus
potential bonus, beginning mid Mar. 2006 and ending mid Mar.
early April 2004 mid Mar. 2006 2010. Available.
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early Sept. 2005 early Sept. 2009 Available.
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Five-year term extension with Petrobras in low 180's, plus
potential bonus, beginning mid Dec. 2005 and ending mid Dec.
early Jan. 2003 mid Dec. 2005 2010. Available.
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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.
early May 2005 late Oct. 2005 Available; actively marketing.
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mid June 2005 late Mar. 2006 Available; actively marketing.
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====================================================================================================

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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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Currently retired from active service as drilling and
- - production platform.
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Singapore shipyard, estimated completion Q1 2008. Available;
- - actively marketing.
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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