.
.
.
EXHIBIT 99.1
DIAMOND OFFSHORE DRILLING, INC. RIG STATUS REPORT AS OF NOVEMBER 29, 2004
<Table>
<Caption>
RIG NAME WD DESIGN LOCATION STATUS* OPERATOR
-------- -- ------ -------- ------- --------
DOMESTIC DEEPWATER SEMISUBMERSIBLES (6)
- ------------------------------------------------------------------------------------------------------------------------------
Ocean Quest 3,500' Victory Class GOM Contracted Noble Energy
Ocean Star 5,500' Victory Class GOM Contracted Kerr-McGee
Ocean America 5,500' Ocean Odyssey GOM Contracted Mariner
Ocean Valiant 5,500' Ocean Odyssey GOM Contracted ENI
Ocean Victory 5,500' Victory Class GOM Contracted W&T Offsshore
Ocean Confidence 7,500' DP Aker H-3.2 Modified GOM Contracted BP
DOMESTIC 2ND/3RD GENERATION SEMISUBMERSIBLES (4)
- ------------------------------------------------------------------------------------------------------------------------------
Ocean Voyager 2,000' Victory Class GOM DODI --
Ocean Concord 2,200' F&G SS-2000 GOM Contracted Kerr-McGee
Ocean Lexington 2,200' F&G SS-2000 GOM Contracted Walter Oil & Gas
Ocean Saratoga 2,200' F&G SS-2000 GOM Contracted LLOG
<Caption>
RIG NAME CURRENT TERM DAYRATE (000S) START DATE EST. END DATE
-------- ------------ -------------- ---------- -------------
DOMESTIC DEEPWATER SEMISUBMERSIBLES (6)
- ------------------------------------------------------------------------------------------------------------------------
Ocean Quest one well low 50's early Sept. 2004 early Dec. 2004
Ocean Star fourth of four wells low 60's early June 2004 early Dec. 2004
Ocean America one well extension mid 80's late Oct. 2004 mid Jan. 2005
Ocean Valiant third of three wells plus option high 50's late Dec. 2003 late Dec. 2004
Ocean Victory two wells mid 70's mid Aug. 2004 early Feb. 2005
Ocean Confidence five-year term 170's early Jan. 2001 early Jan. 2006
DOMESTIC 2ND/3RD GENERATION SEMISUBMERSIBLES (4)
- ------------------------------------------------------------------------------------------------------------------------
Ocean Voyager -- -- -- --
Ocean Concord one well plus option mid 50's early Oct. 2004 late Dec. 2004
Ocean Lexington one well high 40's early Sept. 2004 late April 2005
Ocean Saratoga one well low 50's late Oct. 2004 early Dec. 2004
<Caption>
RIG NAME FUTURE CONTRACT AND OTHER INFORMATION
-------- -------------------------------------
DOMESTIC DEEPWATER SEMISUBMERSIBLES (6)
- -------------------------------------------------------------------------------------------------------
Ocean Quest One well plus option with Pogo in mid 70's beginning early Dec. and ending mid
Jan. 2005; followed by LOI for one well in low 100's beginning mid Jan. 2005 and
ending mid April 2005; followed by LOI for one well in high 110's beginning mid
April and ending mid June 2005. Available; actively marketing.
Ocean Star 220 day extension with Kerr-McGee in high 70's beginning early Dec. 2004 and
ending early July 2005; followed by 90 day term extension plus option with
Kerr-McGee in low 140's beginning early July 2005 and ending early Oct. 2005.
Available; actively marketing.
Ocean America One well extension plus option with Mariner in mid 110's beginning mid Jan. 2005
and ending mid Feb. 2005; followed by two wells plus option with Mariner in low
130's beginning mid Feb. and ending late May 2005. Available; actively
marketing.
Ocean Valiant One well plus options with Kerr-McGee in mid 80's beginning late Dec. and ending
mid Feb. 2005; followed by one well with Kerr-McGee in high 90's beginning mid
Feb. 2005 and ending late April 2005, followed by one well plus options with
Kerr-McGee in low 130's beginning late April and ending late June 2005.
Available; actively marketing.
Ocean Victory LOI for one well plus option in mid 90's beginnning early Feb. 2005 and ending
early April 2005. LOI for two wells in low 130's beginning early April and
ending mid July 2005. Available; actively marketing.
Ocean Confidence 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; followed by one well with Walter in mid 70's beginning
early Feb. 2005 and ending early Mar. 2005; followed by one well with Walter in
low 80's beginning early Mar. 2005 and ending early April 2005. Available;
actively marketing.
Ocean Concord 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 Three well extension with Walter beginning in early Sept. and ending in late
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 late Dec. 2004
and ending late Mar. 2005. Rate for first and second wells in mid 50s with third
well in low 60s. One additional well plus option with Walter in low 60's
beginning late Mar. and ending late April 2005; followed by approximately
120-day Survey and maintenance. Available; actively marketing.
Ocean Saratoga Three well extension with LLOG in mid 60's beginning early Dec. 2004 and ending
late Mar. 2005. Available; actively marketing.
</Table>
DIAMOND OFFSHORE DRILLING, INC. RIG STATUS REPORT AS OF November 29, 2004
<Table>
<Caption>
RIG NAME WD DESIGN LOCATION STATUS* OPERATOR
-------- -- ------ -------- ------- --------
DOMESTIC JACKUPS (12)
- -----------------------------------------------------------------------------------------------------------------------------
Ocean Crusader 200' Mat Cantilever GOM Contracted Walter Oil & Gas
Ocean Drake 200' Mat Cantilever GOM Contracted Chevron/Texaco
Ocean Champion 250' Mat Slot GOM Contracted Millennium
Ocean Columbia 250' Independent Leg Cantilever GOM Contracted ADTI/Kerr-McGee
Ocean Spartan 300' Independent Leg Cantilever GOM Contracted LLOG
Ocean Spur 300' Independent Leg Cantilever GOM Contracted Walter Oil & Gas
Ocean King 300' Independent Leg Cantilever GOM Contracted Houston Exploration
Ocean Nugget 300' Independent Leg Cantilever GOM Contracted ADTI/Mission
Ocean Summit 300' Independent Leg Cantilever GOM Contracted LLOG
Ocean Warwick 300' Independent Leg Cantilever GOM Shipyard DODI
Ocean Titan 350' Independent Leg Cantilever GOM Contracted Stone Energy
Ocean Tower 350' Independent Leg Cantilever GOM Contracted W&T Offshore
<Caption>
RIG NAME CURRENT TERM DAYRATE (000S) START DATE EST. END DATE
-------- ------------ -------------- ---------- -------------
DOMESTIC JACKUPS (12)
- -------------------------------------------------------------------------------------------------------------------------
Ocean Crusader second of two wells plus option mid 30's early Nov. 2004 early Dec. 2004
Ocean Drake 60 day term extension plus option high 30's early Nov. 2004 early Jan. 2005
Ocean Champion one well mid 30's early Sept. 2004 mid Dec. 2004
Ocean Columbia one well plus option mid 30's mid Nov. 2004 mid Dec. 2004
Ocean Spartan two wells plus option high 30's early Sept. 2004 early Dec. 2004
Ocean Spur one well low 50's late Nov. 2004 mid Dec. 2004
Ocean King two wells mid 40s late Aug. 2004 mid Dec. 2004
Ocean Nugget one well plus option low 40's mid Nov. 2004 mid Dec. 2004
Ocean Summit three wells plus option high 30's early Sept. 2004 early Jan. 2005
Ocean Warwick -- -- -- --
Ocean Titan one well plus option low 50's early Nov. 2004 mid Dec. 2004
Ocean Tower two wells mid 40's late Oct. 2004 late Dec. 2004
<Caption>
RIG NAME FUTURE CONTRACT AND OTHER INFORMATION
-------- -------------------------------------
DOMESTIC JACKUPS (12)
- -----------------------------------------------------------------------------------------------------
Ocean Crusader Two well extension plus option with Walter in high 30's beginning early Dec.
2004 and ending early Feb. 2005. Available; actively marketing.
Ocean Drake Available; actively marketing.
Ocean Champion Two wells plus option with Energy Partners in mid 30's beginning mid Dec. and
mid Feb. 2005. Available; actively marketing.
Ocean Columbia Available; actively marketing.
Ocean Spartan One well extension with LLOG in mid 40's beginning early Dec. 2004 and ending
early Feb. 2005. Available; actively marketing.
Ocean Spur Second of two wells with Mariner in high 30's beginning mid Dec. 2004 and ending
early Jan. 2005; followed by one well with Spinnaker in mid 40's beginning early
Jan. 2005 and ending mid Feb. 2005. Available; actively marketing.
Ocean King Available; actively marketing.
Ocean Nugget Available; actively marketing.
Ocean Summit Two wells with LLOG in mid 40's beginning early Jan. and ending mid Mar. 2005.
Available; actively marketing.
Ocean Warwick In shipyard for repair of damage due to Hurricane Ivan.
Ocean Titan One well plus options with BHP in mid 50's beginning mid Dec. 2004 and ending
mid April 2005. Available; actively marketing.
Ocean Tower One well plus option with ChevronTexaco in mid 50's beginning late Dec. 2004 and
ending late June 2005. Available; actively marketing.
</Table>
DIAMOND OFFSHORE DRILLING, INC. RIG STATUS REPORT AS OF November 29, 2004
<Table>
<Caption>
RIG NAME WD DESIGN LOCATION STATUS* OPERATOR
-------- -- ------ -------- ------- --------
INTERNATIONAL SEMISUBMERSIBLES (17)
- --------------------------------------------------------------------------------------------------------------------------
MEXICO
- --------------------------------------------------------------------------------------------------------------------------
Ocean Ambassador 1,100' Bethlehem SS-2000 GOM Contracted PEMEX
Ocean Whittington 1,500' Aker H-3 GOM Contracted PEMEX
Ocean Worker 3,500' F&G 9500 Enhanced Pacesetter GOM Contracted PEMEX
Ocean Yorktown 2,850' F&G SS-2000 GOM Contracted PEMEX
NORTH SEA
- --------------------------------------------------------------------------------------------------------------------------
Ocean Nomad 1,200' Aker H-3 North Sea -- DODI
Ocean Guardian 1,500' Earl & Wright Sedco 711 Series North Sea Contracted Shell
Ocean Princess 1,500' Aker H-3 North Sea Contracted Talisman
Ocean Vanguard 1,500' Bingo 3000 North Sea Contracted ENI
AUSTRALASIA
- --------------------------------------------------------------------------------------------------------------------------
Ocean Bounty 1,500' Victory Class Australia Contracted OMV
Ocean Patriot 1,500' Bingo 3000 Australia Contracted Apache
Ocean Epoch 1,640' Korkut Australia Contracted Santos
Ocean General 1,640' Korkut Mobe to survey DODI --
Ocean Baroness 7,000' Victory Class Indonesia Contracted Unocal
Ocean Rover 7,000' Victory Class Malaysia Contracted Amerada Hess
<Caption>
RIG NAME CURRENT TERM DAYRATE (000S) START DATE EST. END DATE
-------- ------------ -------------- ---------- -------------
INTERNATIONAL SEMISUBMERSIBLES (17)
- --------------------------------------------------------------------------------------------------------------------------
MEXICO
- --------------------------------------------------------------------------------------------------------------------------
Ocean Ambassador four year term work mid 50's late July 2003 mid Dec. 2007
Ocean Whittington four year term work low 60's late July 2003 early Oct. 2006
Ocean Worker four year term work high 60's mid Aug. 2003 late July 2007
Ocean Yorktown four year term work mid 40's late Oct. 2003 mid July 2007
NORTH SEA
- --------------------------------------------------------------------------------------------------------------------------
Ocean Nomad -- -- -- --
Ocean Guardian one year high 40's late March 2004 late March 2005
Ocean Princess three wells plus option low 60's early Oct. 2004 early Dec. 2004
Ocean Vanguard one well low 140's early Oct. 2004 late Dec. 2005
AUSTRALASIA
- --------------------------------------------------------------------------------------------------------------------------
Ocean Bounty three wells mid 70's early Sept. 2004 mid Feb. 2005
Ocean Patriot two wells high 70's early Nov. 2004 late Dec. 2004
Ocean Epoch Exeter/Mutineer development plus option mid 60's mid Jan. 2004 late Jan. 2005
Ocean General -- -- -- --
Ocean Baroness 180 day option 110's early Nov. 2004 late Dec. 2004
Ocean Rover second of two assignment wells low 110's early Nov. 2004 mid Dec. 2004
<Caption>
RIG NAME FUTURE CONTRACT AND OTHER INFORMATION
-------- -------------------------------------
INTERNATIONAL SEMISUBMERSIBLES (17)
- -------------------------------------------------------------------------------------------------------
MEXICO
- -------------------------------------------------------------------------------------------------------
Ocean Ambassador Available.
Ocean Whittington Available.
Ocean Worker Available.
Ocean Yorktown Available.
NORTH SEA
- -------------------------------------------------------------------------------------------------------
Ocean Nomad One year program with Talisman in U.K. North Sea in low 80's beginning early
Jan. 2005 and ending early Jan. 2006. Available; actively marketing.
Ocean Guardian 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 One year extension in U.K. North Sea in low 80's beginning early Dec. 2004 and
ending late Dec. 2005. Available; actively marketing.
Ocean Vanguard One year program in Norway with Statoil in low 140's beginning in late Dec. 2004
and ending in late Dec. 2005. Available; actively marketing.
AUSTRALASIA
- -------------------------------------------------------------------------------------------------------
Ocean Bounty LOI for one well plus option in mid 70's beginning in mid Feb. and ending in
early Mar. 2005; followed by one well plus option with Hardman in low 80's
beginning in early Mar. 2005 and ending late Mar. 2005; followed by LOI for one
well plus option in mid 80's beginning late Mar. and ending mid May 2005;
followed by LOI for one well plus option in mid 80's beginning mid May and
ending late June 2005; followed by LOI for one well in mid 80's beginning late
June and ending mid July 2005. Available; actively marketing.
Ocean Patriot Second of two wells with Bass Straits beginning late Dec. 2004 and ending late
Jan. 2005. Two wells with Woodside beginning late Jan. and ending late Feb. Two
wells plus option with Santos beginning late Feb. and ending early May. LOI for
one well plus three options beginning early May and ending late June 2005. All
wells in high 70's. Available; actively marketing.
Ocean Epoch Available; actively marketing.
Ocean General UWILD survey; followed by two wells with KNOC in Korea plus mobe/demobe in high
60's beginning mid Dec. and ending mid April 2005; followed by one well plus one
option plus demobe with KNOC in Viet Nam in mid 50's beginning mid April and
ending early June 2005. Available; actively marketing.
Ocean Baroness 180 day extension in mid 130's beginning late Dec. 2004 and ending mid June
2005. Available; actively marketing.
Ocean Rover Second option well with Murphy declared in low 120's beginning mid Dec. 2004 and
ending mid Jan. 2005. Option wells three to six exercised in mid 120's beginning
mid Jan. and ending early July 2005. Available; actively marketing.
</Table>
DIAMOND OFFSHORE DRILLING, INC. RIG STATUS REPORT AS OF NOVEMBER 29, 2004
<Table>
<Caption>
RIG NAME WD DESIGN LOCATION STATUS* OPERATOR
-------- -- ------ -------- ------- --------
BRAZIL
- ---------------------------------------------------------------------------------------------------------------------------
Ocean Yatzy 3,300' DP DYVI Super Yatzy Brazil Contracted Petrobras
Ocean Winner 3,500' Aker H-3 Brazil Contracted Petrobras
Ocean Alliance 5,000' Alliance Class Brazil Contracted Petrobras
INTERNATIONAL DRILLSHIPS (1)
- ---------------------------------------------------------------------------------------------------------------------------
Ocean Clipper 7,500' DP Fluor/Mitsubishi Brazil Contracted Petrobras
INTERNATIONAL JACKUPS (2)
- ---------------------------------------------------------------------------------------------------------------------------
Ocean Sovereign 250' Independent Leg Cantilever Bangladesh Contracted Cairn Energy
Ocean Heritage 300' Independent Leg Cantilever India Contracted Cairn Energy
COLD STACKED (3)
- ---------------------------------------------------------------------------------------------------------------------------
Ocean Liberator 600' Aker H-3 S. Africa Cold Stacked DODI
Ocean Endeavor 2,000' Victory Class GOM Cold Stacked DODI
Ocean New Era 1,500' Korkut GOM Cold Stacked DODI
<Caption>
RIG NAME CURRENT TERM DAYRATE (000S) START DATE EST. END DATE
-------- ------------ -------------- ---------- -------------
BRAZIL
- ------------------------------------------------------------------------------------------------------------------------
Ocean Yatzy 700 day extension mid 70's early Nov. 2003 mid Oct. 2005
Ocean Winner 700 day extension mid 50's early April 2004 mid March 2006
Ocean Alliance one year extension high 90's early Sept. 2004 early Sept. 2005
INTERNATIONAL DRILLSHIPS (1)
- ------------------------------------------------------------------------------------------------------------------------
Ocean Clipper 700 day extension low 100's early Jan. 2003 early March 2006
INTERNATIONAL JACKUPS (2)
- ------------------------------------------------------------------------------------------------------------------------
Ocean Sovereign three wells plus option low 60's mid Nov. 2004 late Mar. 2005
Ocean Heritage six wells plus options low 60's early Nov. 2004 late April 2005
COLD STACKED (3)
- ------------------------------------------------------------------------------------------------------------------------
Ocean Liberator -- -- -- --
Ocean Endeavor -- -- -- --
Ocean New Era -- -- -- --
<Caption>
RIG NAME FUTURE CONTRACT AND OTHER INFORMATION
-------- -------------------------------------
BRAZIL
- ----------------------------------------------------
Ocean Yatzy Available.
Ocean Winner Available.
Ocean Alliance Available.
INTERNATIONAL DRILLSHIPS (1)
- ----------------------------------------------------
Ocean Clipper Available; actively marketing.
INTERNATIONAL JACKUPS (2)
- ----------------------------------------------------
Ocean Sovereign Available; actively marketing.
Ocean Heritage 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.
</Table>
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