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EXHIBIT 99.1
DIAMOND OFFSHORE DRILLING, INC. RIG STATUS REPORT AS OF NOVEMBER 1, 2004
<Table>
<Caption>
RIG NAME WD DESIGN LOCATION STATUS*
- -----------------------------------------------------------------------------
DOMESTIC DEEPWATER SEMISUBMERSIBLES (6)
- -----------------------------------------------------------------------------
Ocean Quest 3,500' Victory Class GOM Contracted
- -----------------------------------------------------------------------------
Ocean Star 5,500' Victory Class GOM Contracted
- -----------------------------------------------------------------------------
Ocean America 5,500' Ocean Odyssey GOM Contracted
- -----------------------------------------------------------------------------
Ocean Valiant 5,500' Ocean Odyssey GOM Contracted
- -----------------------------------------------------------------------------
Ocean Victory 5,500' Victory Class GOM Contracted
- -----------------------------------------------------------------------------
Ocean Confidence 7,500' DP Aker H-3.2 GOM Contracted
Modified
- -----------------------------------------------------------------------------
DOMESTIC 2ND/3RD GENERATION SEMISUBMERSIBLES (4)
- -----------------------------------------------------------------------------
Ocean Voyager 2,000' Victory Class GOM DODI
- -----------------------------------------------------------------------------
Ocean Concord 2,200' F&G SS-2000 GOM Contracted
- -----------------------------------------------------------------------------
Ocean Lexington 2,200' F&G SS-2000 GOM Contracted
- -----------------------------------------------------------------------------
Ocean Saratoga 2,200' F&G SS-2000 GOM Contracted
- -----------------------------------------------------------------------------
<Table>
<Caption>
DAYRATE
RIG NAME OPERATOR CURRENT TERM (000S) START DATE
- -------------------------------------------------------------------------------------
DOMESTIC DEEPWATER SEMISUBMERSIBLES(6)
- -------------------------------------------------------------------------------------
Ocean Quest Noble Energy one well low 50's early Sept.
2004
- -------------------------------------------------------------------------------------
Ocean Star Kerr-McGee fourth of four wells low 60's early June 2004
- -------------------------------------------------------------------------------------
Ocean America Mariner one well extension mid 80's late Oct. 2004
- -------------------------------------------------------------------------------------
Ocean Valiant ENI third of three wells high 50's late Dec. 2003
plus option
- -------------------------------------------------------------------------------------
Ocean Victory W&T two wells mid 70's mid Aug. 2004
Offshore
- -------------------------------------------------------------------------------------
Ocean Confidence BP five-year term 170's early Jan. 2001
- -------------------------------------------------------------------------------------
DOMESTIC 2ND/3RD GENERATION SEMISUBMERSIBLES(4)
- -------------------------------------------------------------------------------------
Ocean Voyager - - - -
- -------------------------------------------------------------------------------------
Ocean Concord Kerr-McGee one well plus option mid 50's early Oct. 2004
- -------------------------------------------------------------------------------------
Ocean Lexington Walter one well plus option high 40's late March 2004
Oil & Gas
- -------------------------------------------------------------------------------------
Ocean Saratoga LLOG one well extension low 50's late Oct. 2004
plus option
- -------------------------------------------------------------------------------------
<Table>
<Caption>
RIG NAME EST. END DATE FUTURE CONTRACT AND OTHER INFORMATION
- -----------------------------------------------------------------------------------------------
DOMESTIC DEEPWATER SEMISUBMERSIBLES(6)
- -----------------------------------------------------------------------------------------------
Ocean Quest mid Nov. 2004 One well plus option with Pogo in mid 70's beginning mid
Nov. and ending late Dec. 2004; followed by LOI for one
well in low 100's beginning late Dec. 2004 and ending late
Mar. 2005. Available; actively marketing.
- -----------------------------------------------------------------------------------------------
Ocean Star early Nov. 2004 220 day extension with Kerr-McGee in upper 70's beginning
mid Oct. 2004 and ending mid June 2005; followed by 90 day
term extension plus option with Kerr-McGee in low 140's
beginning mid June 2005 and ending early Sept. 2005.
Available; actively marketing.
- -----------------------------------------------------------------------------------------------
Ocean America mid Dec. 2004 One well extension plus option with Mariner in mid 110's
beginning early Jan. 2005 and ending early Feb. 2005.
Available; actively marketing.
- -----------------------------------------------------------------------------------------------
Ocean Valiant mid Nov. 2004 One well plus options with Kerr-McGee in mid 80's
beginning mid Nov. and ending late Dec. 2004; followed by
one well with Kerr-McGee in high 90's beginning late Dec.
2004 and ending early Mar. 2005, followed by one well plus
options with Kerr-McGee in low 130's beginning mid April
and ending mid June 2005. Available; actively marketing.
- -----------------------------------------------------------------------------------------------
Ocean Victory early Jan. 2005 LOI for one well plus option in mid 90's beginnning early
Jan. 2005 and ending early March 2005. LOI for two wells
in low 130's beginning early March and ending early July
2005. Available; actively marketing.
- -----------------------------------------------------------------------------------------------
Ocean Confidence early Jan. 2006 Available; actively marketing.
- -----------------------------------------------------------------------------------------------
DOMESTIC 2ND/3RD GENERATION SEMISUBMERSIBLES(4)
- -----------------------------------------------------------------------------------------------
Ocean Voyager - Reactivating. One well with Murphy in low 70's beginning
mid Dec. 2004 and ending early Feb. 2005. Available;
actively marketing.
- -----------------------------------------------------------------------------------------------
Ocean Concord late Dec. 2004 One well with ENI in mid 50's beginning late Dec. 2004 and
ending late Feb. 2005; followed by one well for Kerr-McGee
in upper 50's beginning late Feb. and ending late Mar.
2005; followed by one well plus option with Kerr-McGee in
mid 70's beginning late Mar. and ending late May 2005.
Available; actively marketing.
- -----------------------------------------------------------------------------------------------
Ocean Lexington mid March 2005 Three well extension with Walter beginning in early Sept.
and ending in mid Dec. 2004. Rate for first well in mid
40's, second and third wells in upper 40's. Three
additional extension wells with Walter beginning in mid
Dec. 2004 and ending mid March 2005. Rate for first and
second wells in mid 50s with third well in low 60s.
Available; actively marketing.
- -----------------------------------------------------------------------------------------------
Ocean Saratoga late Nov. 2004 Three well extension with LLOG in mid 60's beginning late
Nov. 2004 and ending mid March 2005. Available; actively
marketing.
- -----------------------------------------------------------------------------------------------
DIAMOND OFFSHORE DRILLING, INC. RIG STATUS REPORT AS OF NOVEMBER 1, 2004
<Table>
<Caption>
RIG NAME WD DESIGN LOCATION STATUS*
- ----------------------------------------------------------------------------
DOMESTIC JACKUPS (12)
- ----------------------------------------------------------------------------
Ocean Crusader 200' Mat Cantilever GOM Contracted
- ----------------------------------------------------------------------------
Ocean Drake 200' Mat Cantilever GOM Contracted
- ----------------------------------------------------------------------------
Ocean Champion 250' Mat Slot GOM Contracted
- ----------------------------------------------------------------------------
Ocean Columbia 250' Independent Leg GOM Contracted
Cantilever
- ----------------------------------------------------------------------------
Ocean Spartan 300' Independent Leg GOM Contracted
Cantilever
- ----------------------------------------------------------------------------
Ocean Spur 300' Independent Leg GOM Contracted
Cantilever
- ----------------------------------------------------------------------------
Ocean King 300' Independent Leg GOM Contracted
Cantilever
- ----------------------------------------------------------------------------
Ocean Nugget 300' Independent Leg GOM Contracted
Cantilever
- ----------------------------------------------------------------------------
Ocean Summit 300' Independent Leg GOM Contracted
Cantilever
- ----------------------------------------------------------------------------
Ocean Warwick 300' Independent Leg GOM Contracted/DODI
Cantilever
- ----------------------------------------------------------------------------
Ocean Titan 350' Independent Leg GOM Contracted
Cantilever
- ----------------------------------------------------------------------------
Ocean Tower 350' Independent Leg GOM Contracted
Cantilever
- ----------------------------------------------------------------------------
<Table>
<Caption>
DAYRATE
RIG NAME OPERATOR CURRENT TERM (000S) START DATE
- --------------------------------------------------------------------------------------
DOMESTIC JACKUPS (12)
- --------------------------------------------------------------------------------------
Ocean Crusader Walter Oil & Gas two wells plus option mid 30's mid Sept. 2004
- --------------------------------------------------------------------------------------
Ocean Drake Chevron/Texaco two wells plus option mid 30's mid Oct. 2004
- --------------------------------------------------------------------------------------
Ocean Champion Millennium one well plus option mid 30's early Sept.
2004
- --------------------------------------------------------------------------------------
Ocean Columbia ADTI/Kerr-McGee one well plus option mid 30's early Sept.
2004
- --------------------------------------------------------------------------------------
Ocean Spartan LLOG two wells plus option high 30's early Sept.
2004
- --------------------------------------------------------------------------------------
Ocean Spur Mariner two wells high 30's early Sept.
2004
- --------------------------------------------------------------------------------------
Ocean King Houston two wells mid 40's late Aug.
Exploration 2004
- --------------------------------------------------------------------------------------
Ocean Nugget Spinnaker one well mid 30's mid Sept.
2004
- --------------------------------------------------------------------------------------
Ocean Summit LLOG three wells plus high 30's early Sept.
option 2004
- --------------------------------------------------------------------------------------
Ocean Warwick Newfield - - -
- --------------------------------------------------------------------------------------
Ocean Titan Stone Energy second of two wells mid 40's mid July
plus option 2004
- --------------------------------------------------------------------------------------
Ocean Tower W&T Offshore two wells mid 40's late Oct.
2004
- --------------------------------------------------------------------------------------
<Table>
<Caption>
RIG NAME EST. END DATE FUTURE CONTRACT AND OTHER INFORMATION
- ------------------------------------------------------------------------------------------------
DOMESTIC JACKUPS (12)
- ------------------------------------------------------------------------------------------------
Ocean Crusader early Dec. 2004 Two well extension plus option with Walter in high 30's
beginning early Dec. 2004 and ending late Jan. 2005.
Available; actively marketing.
- ------------------------------------------------------------------------------------------------
Ocean Drake early Nov. 2004 Available; actively marketing.
- ------------------------------------------------------------------------------------------------
Ocean Champion mid Nov. 2004 Two wells plus option with Energy Partners in mid 30's
beginning mid Nov. and ending mid Jan. 2005. Available;
actively marketing.
- ------------------------------------------------------------------------------------------------
Ocean Columbia early Nov. 2004 One well extension with Kerr-McGee in mid 30's beginning
early Nov. and ending early Dec. 2004. Available;
actively marketing.
- ------------------------------------------------------------------------------------------------
Ocean Spartan early Jan. 2005 Available; actively marketing.
- ------------------------------------------------------------------------------------------------
Ocean Spur early Dec. 2004 Available; actively marketing.
- ------------------------------------------------------------------------------------------------
Ocean King early Dec. 2004 Available; actively marketing.
- ------------------------------------------------------------------------------------------------
Ocean Nugget early Nov. 2004 One well plus option with ADTI/Mission in low 40's
beginning early Nov. and ending mid Dec. 2004. Available;
actively marketing.
- ------------------------------------------------------------------------------------------------
Ocean Summit early Jan. 2005 Available; actively marketing.
- ------------------------------------------------------------------------------------------------
Ocean Warwick - In shipyard for repair of damage due to Hurricane Ivan.
- ------------------------------------------------------------------------------------------------
Ocean Titan early Nov. 2004 One well plus option with Stone in low 50's beginning in
late Oct. and ending early Dec. 2004; followed by one well
plus options with BHP in mid 50's beginning early Dec.
2004 and ending late Mar. 2005. Available; actively
marketing.
- ------------------------------------------------------------------------------------------------
Ocean Tower late Dec. 2004 One well plus option with ChevronTexaco in mid 50's
beginning late Dec. 2004 and ending early June 2005.
Available; actively marketing.
- ------------------------------------------------------------------------------------------------
DIAMOND OFFSHORE DRILLING, INC. RIG STATUS REPORT AS OF NOVEMBER 1, 2004
<Table>
<Caption>
RIG NAME WD DESIGN LOCATION STATUS*
- ------------------------------------------------------------------------------
INTERNATIONAL SEMISUBMERSIBLES (17)
- ------------------------------------------------------------------------------
MEXICO
- ------------------------------------------------------------------------------
Ocean Ambassador 1,100' Bethlehem SS-2000 GOM Contracted
- ------------------------------------------------------------------------------
Ocean Whittington 1,500' Aker H-3 GOM Contracted
- ------------------------------------------------------------------------------
Ocean Worker 3,500' F&G 9500 Enhanced GOM Contracted
Pacesetter
- ------------------------------------------------------------------------------
Ocean Yorktown 2,850' F&G SS-2000 GOM Contracted
- ------------------------------------------------------------------------------
NORTH SEA
- ------------------------------------------------------------------------------
Ocean Nomad 1,200' Aker H-3 - Mobe to North Sea
- ------------------------------------------------------------------------------
Ocean Guardian 1,500' Earl & Wright North Sea Contracted
Sedco 711
Series
- ------------------------------------------------------------------------------
Ocean Princess 1,500' Aker H-3 North Sea Contracted
- ------------------------------------------------------------------------------
Ocean Vanguard 1,500' Bingo 3000 North Sea Contracted
- ------------------------------------------------------------------------------
AUSTRALASIA
- ------------------------------------------------------------------------------
Ocean Bounty 1,500' Victory Class Australia Contracted
- ------------------------------------------------------------------------------
Ocean Patriot 1,500' Bingo 3000 Australia Contracted
- ------------------------------------------------------------------------------
Ocean Epoch 1,640' Korkut Australia Contracted
- ------------------------------------------------------------------------------
Ocean General 1,640' Korkut Vietnam Contracted
- ------------------------------------------------------------------------------
Ocean Baroness 7,000' Victory Class Indonesia Contracted
- ------------------------------------------------------------------------------
Ocean Rover 7,000' Victory Class Malaysia Contracted
- ------------------------------------------------------------------------------
<Table>
<Caption>
DAYRATE
RIG NAME OPERATOR CURRENT TERM (000S) START DATE
- ------------------------------------------------------------------------------------
INTERNATIONAL SEMISUBMERSIBLES (17)
- ------------------------------------------------------------------------------------
MEXICO
- ------------------------------------------------------------------------------------
Ocean Ambassador PEMEX four year term work mid 50's late July 2003
- ------------------------------------------------------------------------------------
Ocean Whittington PEMEX four year term work low 60's late July 2003
- ------------------------------------------------------------------------------------
Ocean Worker PEMEX four year term work high 60's mid Aug. 2003
- ------------------------------------------------------------------------------------
Ocean Yorktown PEMEX four year term work mid 40's late Oct. 2003
- ------------------------------------------------------------------------------------
NORTH SEA
- ------------------------------------------------------------------------------------
Ocean Nomad DODI - - -
- ------------------------------------------------------------------------------------
Ocean Guardian Shell one year high 40's late March 2004
- ------------------------------------------------------------------------------------
Ocean Princess Talisman three wells plus low 60's early Oct. 2004
option
- ------------------------------------------------------------------------------------
Ocean Vanguard ENI one well low 140's early Oct. 2004
- ------------------------------------------------------------------------------------
AUSTRALASIA
- ------------------------------------------------------------------------------------
Ocean Bounty OMV three wells mid 70's early Sept.
2004
- ------------------------------------------------------------------------------------
Ocean Patriot Santos two wells high 70's mid Oct. 2004
- ------------------------------------------------------------------------------------
Ocean Epoch Santos Exeter/Mutineer mid 60's mid Jan. 2004
development plus
option
- ------------------------------------------------------------------------------------
Ocean General PVE&P five completion mid 50's mid June 2004
options
- ------------------------------------------------------------------------------------
Ocean Baroness Unocal 180 day option 110's late April 2004
- ------------------------------------------------------------------------------------
Ocean Rover Amerada Hess first of two low 100s mid Oct. 2004
assignment
wells
- ------------------------------------------------------------------------------------
<Table>
<Caption>
RIG NAME EST. END DATE FUTURE CONTRACT AND OTHER INFORMATION
- -------------------------------------------------------------------------------------------------
INTERNATIONAL SEMISUBMERSIBLES (17)
- -------------------------------------------------------------------------------------------------
MEXICO
- -------------------------------------------------------------------------------------------------
Ocean Ambassador mid Dec. 2007 Available.
- -------------------------------------------------------------------------------------------------
Ocean Whittington early Oct. 2006 Available.
- -------------------------------------------------------------------------------------------------
Ocean Worker late July 2007 Available.
- -------------------------------------------------------------------------------------------------
Ocean Yorktown mid July 2007 Available.
- -------------------------------------------------------------------------------------------------
NORTH SEA
- -------------------------------------------------------------------------------------------------
Ocean Nomad - One year program with Talisman in U.K. North Sea in low
80's beginning late Jan. 2005 and ending late Jan. 2006.
Available; actively marketing.
- -------------------------------------------------------------------------------------------------
Ocean Guardian late March 2005 LOI for one year program in U.K. North Sea in low 80's
beginning late Mar. 2005 and ending late Mar. 2006.
Available; actively marketing.
- -------------------------------------------------------------------------------------------------
Ocean Princess late Dec. 2004 One year extension in U.K. North Sea in low 80's beginning
late Dec. 2004 and ending late Dec. 2005. Available;
actively marketing.
- -------------------------------------------------------------------------------------------------
Ocean Vanguard early Jan. 2005 LOI for one year program in Norway in low 140's beginning
in early Jan. 2005 and ending in early Jan. 2006.
Available; actively marketing.
- -------------------------------------------------------------------------------------------------
AUSTRALASIA
- -------------------------------------------------------------------------------------------------
Ocean Bounty late Dec. 2004 LOI for one well plus option in mid 70's beginning late
Dec. 2004 and ending late Jan. 2005; followed by one well
plus option with Hardman in low 80's beginning in late
Jan. 2005 and ending mid Feb. 2005. Available; actively
marketing.
- -------------------------------------------------------------------------------------------------
Ocean Patriot early Nov. 2004 Two wells plus option with Apache beginning early Nov. and
ending mid Dec. Second of two wells with Bass Straits
beginning mid Dec. 2004 and ending mid Jan. 2005. LOI for
two wells beginning mid Jan. and ending mid Feb. Two
wells plus option with Santos beginning mid Feb. and
ending late April. LOI for one well plus three options
beginning late April and ending early June 2005. All
wells in high 70's. Available; actively marketing.
- -------------------------------------------------------------------------------------------------
Ocean Epoch late Feb. 2005 Available; actively marketing.
- -------------------------------------------------------------------------------------------------
Ocean General mid Nov. 2004 LOI for two wells in Korea plus mobe/demobe in high 60's
beginning late Nov. and ending mid Mar. 2005; followed by
one well plus one option plus demobe with KNOC in Viet Nam
in mid 50's beginning mid Mar. and ending late May 2005.
Available; actively marketing.
- -------------------------------------------------------------------------------------------------
Ocean Baroness early Nov. 2004 180 day extension in mid 130's beginning early Nov. 2004
and ending early May 2005. Available; actively
marketing.
- -------------------------------------------------------------------------------------------------
Ocean Rover early Nov. 2004 Second assignment well with Amerada Hess in low 110's
beginning early Nov. and ending late Dec. 2004. Fourth
option well with Murphy declared in low 120's beginning
late Dec. 2004 and ending mid Jan. 2005. Available;
actively marketing.
- -------------------------------------------------------------------------------------------------
DIAMOND OFFSHORE DRILLING, INC. RIG STATUS REPORT AS OF NOVEMBER 1, 2004
<Table>
<Caption>
RIG NAME WD DESIGN LOCATION STATUS*
- -------------------------------------------------------------------------------
BRAZIL
- -------------------------------------------------------------------------------
Ocean Yatzy 3,300' DP DYVI Super Yatzy Brazil Contracted
- -------------------------------------------------------------------------------
Ocean Winner 3,500' Aker H-3 Brazil Contracted
- -------------------------------------------------------------------------------
Ocean Alliance 5,000' Alliance Class Brazil Contracted
- -------------------------------------------------------------------------------
INTERNATIONAL DRILLSHIPS (1)
- -------------------------------------------------------------------------------
Ocean Clipper 7,500' DP Fluor/Mitsubishi Brazil Contracted
- -------------------------------------------------------------------------------
INTERNATIONAL JACKUPS (2)
- -------------------------------------------------------------------------------
Ocean Sovereign 250' Independent Leg Under tow Contracted
Cantilever
- -------------------------------------------------------------------------------
Ocean Heritage 300' Independent Leg India Contracted
Cantilever
- -------------------------------------------------------------------------------
COLD STACKED (3)
- -------------------------------------------------------------------------------
Ocean Liberator 600' Aker H-3 S. Africa Cold Stacked
- -------------------------------------------------------------------------------
Ocean Endeavor 2,000' Victory Class GOM Cold Stacked
- -------------------------------------------------------------------------------
Ocean New Era 1,500' Korkut GOM Cold Stacked
- -------------------------------------------------------------------------------
<Table>
<Caption>
DAYRATE
RIG NAME OPERATOR CURRENT TERM (000S) START DATE
- --------------------------------------------------------------------------------------------
BRAZIL
- --------------------------------------------------------------------------------------------
Ocean Yatzy Petrobras 700 day extension mid 70's early Nov. 2003
- --------------------------------------------------------------------------------------------
Ocean Winner Petrobras 700 day extension mid 50's early April
2004
- --------------------------------------------------------------------------------------------
Ocean Alliance Petrobras one year extension high 90's early Sept.
2004
- --------------------------------------------------------------------------------------------
INTERNATIONAL DRILLSHIPS (1)
- --------------------------------------------------------------------------------------------
Ocean Clipper Petrobras 700 day extension low 100's early Jan. 2003
- --------------------------------------------------------------------------------------------
INTERNATIONAL JACKUP (2)
- --------------------------------------------------------------------------------------------
Ocean Sovereign Cairn Energy three wells plus low 60's mid Nov. 2004
option
- --------------------------------------------------------------------------------------------
Ocean Heritage Cairn Energy six wells plus low 60's early Nov. 2004
options
- --------------------------------------------------------------------------------------------
COLD STACKED (3)
- --------------------------------------------------------------------------------------------
Ocean Liberator DODI - - -
- --------------------------------------------------------------------------------------------
Ocean Endeavor DODI - - -
- --------------------------------------------------------------------------------------------
Ocean New Era DODI - - -
- --------------------------------------------------------------------------------------------
<Table>
<Caption>
RIG NAME EST. END DATE FUTURE CONTRACT AND OTHER INFORMATION
- -------------------------------------------------------------------------------------
BRAZIL
- -------------------------------------------------------------------------------------
Ocean Yatzy mid Oct. 2005 Available.
- -------------------------------------------------------------------------------------
Ocean Winner mid March 2006 Available.
- -------------------------------------------------------------------------------------
Ocean Alliance early Sept. 2005 Available.
- -------------------------------------------------------------------------------------
INTERNATIONAL DRILLSHIPS (1)
- -------------------------------------------------------------------------------------
Ocean Clipper early March 2006 Available; actively marketing.
- -------------------------------------------------------------------------------------
INTERNATIONAL JACKUPS (2)
- -------------------------------------------------------------------------------------
Ocean Sovereign late April 2005 Under tow to Bangladesh. Available; actively
marketing.
- -------------------------------------------------------------------------------------
Ocean Heritage mid May 2005 Available; actively marketing.
- -------------------------------------------------------------------------------------
COLD STACKED (3)
- -------------------------------------------------------------------------------------
Ocean Liberator - Cold stacked Nov. '02.
- -------------------------------------------------------------------------------------
Ocean Endeavor - Cold stacked March '02.
- -------------------------------------------------------------------------------------
Ocean New Era - Cold stacked Dec. '02.
- -------------------------------------------------------------------------------------
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.
GOM = Gulf of Mexico