EXHIBIT 99.1 ------------ [Diamond Offshore logo] FOR IMMEDIATE RELEASE CONTACT: LES VAN DYKE DIRECTOR, INVESTOR RELATIONS (281) 492-5370 DIAMOND OFFSHORE DRILLING, INC. ANNOUNCES FIRST QUARTER 2004 RESULTS Houston, Texas, April 20, 2004 -- Diamond Offshore Drilling, Inc. (NYSE:DO) today reported a net loss for the first quarter of 2004 of $11.0 million, or $0.08 per share on a diluted basis, compared with a net loss of $21.6 million, or $0.17 per share on a diluted basis in the same period a year earlier. Revenues for the first quarter of 2004 were $184.2 million, compared with revenues of $146.1 million for the first quarter of 2003. Diamond Offshore President and Chief Operating Officer Larry Dickerson noted that, "Results for the quarter were impacted by planned surveys as well as greater than anticipated idle time on several of the Company's mid-water and deepwater units. However, market conditions appear to be improving, and we are realizing benefits from continuing cost control programs initiated in 2003. Scheduled survey work is expected to be completed in the second quarter, and our goal is to resume the sequential quarterly improvements achieved last year as we move forward in 2004." Diamond Offshore is a leader in deep water drilling. The Company's fleet of 45 offshore drilling rigs consists of 30 semisubmersibles, 14 jack-ups and one drillship. The fleet operates in the waters of six of the world's seven continents. As previously announced, Diamond Offshore will provide an online, real-time simulcast and rebroadcast of its 2004 first quarter earnings release conference call. The live broadcast of the Diamond Offshore Drilling, Inc. quarterly conference call will be available online at www.diamondoffshore.com on April 20, 2004, beginning at 9:00 a.m. Central Time. The online replay will follow immediately and continue for 5 days after the original call. Please go to the web site at least 15 minutes before the broadcast to register, download and install any necessary audio software. Statements in this press release may contain "forward-looking statements" within the meaning of Section 27A of the Securities Act of 1933, as amended, and Section 21E of the Securities Exchange Act of 1934, as amended, and are inherently subject to a variety of risks and uncertainties that could cause actual results to differ materially from those anticipated or projected. A discussion of the risk factors that could impact these areas and the Company's overall business and financial performance can be found in the Company's reports and other filings with the Securities and Exchange Commission. These factors include, among others, general economic and business conditions, casualty losses, industry fleet capacity, changes in foreign and domestic oil and gas exploration and production activity, competition, changes in foreign, political, social and economic conditions, regulatory initiatives and compliance with governmental regulations, customer preferences and various other matters, many of which are beyond the Company's control. Given these concerns, investors and analysts should not place undue reliance on forward-looking statements. Each forward-looking statement speaks only as of the date of this press release. The Company expressly disclaims any obligation or undertaking to release publicly any updates or revisions to any forward-looking statement to reflect any change in the Company's expectations with regard thereto or any change in events, conditions or circumstances on which any forward-looking statement is based. #### DIAMOND OFFSHORE DRILLING, INC. AND SUBSIDIARIES CONSOLIDATED STATEMENTS OF OPERATIONS (Unaudited) (In thousands, except per share data) THREE MONTHS ENDED MARCH 31, ------------------------------------ 2004 2003 ----------------- ---------------- REVENUES: Contract drilling.......................................... $ 177,240 $ 139,859 Revenues related to reimbursable expenses.................. 6,958 6,290 ----------------- ----------------- Total revenues....................................... 184,198 146,149 ----------------- ----------------- OPERATING EXPENSES: Contract drilling.......................................... 134,678 113,670 Reimbursable expenses........................................ 6,234 5,738 Depreciation............................................... 44,520 47,277 General and administrative................................. 8,789 7,200 Gain on sale of assets..................................... (325) (1) ----------------- ----------------- Total operating expenses............................. 193,896 173,884 ----------------- ----------------- OPERATING LOSS..................................................... (9,698) (27,735) OTHER INCOME (EXPENSE): Interest income............................................ 1,568 4,156 Interest expense........................................... (6,354) (5,575) Loss on sale of marketable securities...................... (25) (61) Other, net.............................................. (154) 1,742 ----------------- ----------------- LOSS BEFORE INCOME TAX BENEFIT..................................... (14,663) (27,473) INCOME TAX BENEFIT................................................. 3,691 5,907 ----------------- ----------------- NET LOSS.......................................................... $ (10,972) $ (21,566) ================= ================= EARNINGS PER SHARE: Basic ..................................................... $ (0.08) $ (0.17) ================= ================= Diluted.................................................... $ (0.08) $ (0.17) ================= ================= WEIGHTED AVERAGE SHARES OUTSTANDING: Common shares........................................... 129,322 130,336 Dilutive potential common shares........................ -- -- ----------------- ----------------- Total weighted average shares outstanding....... 129,322 130,336 ================= ================= DIAMOND OFFSHORE DRILLING, INC. AND SUBSIDIARIES RESULTS OF OPERATIONS (Unaudited) (In thousands) THREE MONTHS ENDED MARCH 31, --------------------------------- 2004 2003 ---------------- ---------------- REVENUES High Specification Floaters....................... $ 64,752 $ 63,634 Other Semisubmersibles............................ 71,135 51,703 Jack-ups.......................................... 40,819 23,566 Integrated Services............................... -- 1,189 Other............................................. 534 -- Eliminations...................................... -- (233) ---------------- ---------------- TOTAL CONTRACT DRILLING REVENUE..................... $ 177,240 $ 139,859 ================ ================ REVENUES RELATED TO REIMBURSABLE EXPENSES........... $ 6,958 $ 6,290 ================ ================ CONTRACT DRILLING EXPENSE High Specification Floaters....................... $ 42,470 $ 38,276 Other Semisubmersibles............................ 62,992 49,717 Jack-ups.......................................... 27,937 24,251 Integrated Services............................... -- 1,249 Other............................................. 1,279 410 Eliminations...................................... -- (233) ---------------- ---------------- TOTAL CONTRACT DRILLING EXPENSE..................... $ 134,678 $ 113,670 ================ ================ REIMBURSABLE EXPENSES............................... $ 6,234 $ 5,738 ================ ================ OPERATING LOSS High Specification Floaters....................... $ 22,282 $ 25,358 Other Semisubmersibles............................ 8,143 1,986 Jack-ups.......................................... 12,882 (685) Integrated Services............................... -- (60) Other............................................. (745) (410) Reimbursables, net................................ 724 552 Depreciation Expense.............................. (44,520) (47,277) General and Administrative Expense................ (8,789) (7,200) Gain on Sale of Assets............................ 325 1 ---------------- ---------------- Total Operating Loss...................... $ (9,698) $ (27,735) ================ ================ DIAMOND OFFSHORE DRILLING, INC. AND SUBSIDIARIES CONDENSED CONSOLIDATED BALANCE SHEETS (In thousands) MARCH 31, DECEMBER 31, --------------------------------------- 2004 2003 ------------------- ------------------- (unaudited) ASSETS Current assets: Cash and cash equivalents........................................... $ 115,969 $ 106,345 Marketable securities (1)........................................... 627,773 503,995 Accounts receivable................................................. 149,447 154,124 Rig inventory and supplies.......................................... 48,520 48,035 Prepaid expenses and other.......................................... 19,890 22,764 ------------------- ------------------- Total current assets.................................. 961,599 835,263 Drilling and other property and equipment, net of accumulated depreciation............................................. 2,236,575 2,257,876 Goodwill, net of accumulated amortization................................. 7,695 11,099 Other assets.............................................................. 30,162 30,781 ------------------- ------------------- Total assets.......................................... $ 3,236,031 $ 3,135,019 =================== =================== LIABILITIES AND STOCKHOLDERS' EQUITY Current liabilities: Accrued investment purchase (1)..................................... $ 124,908 $ -- Other current liabilities........................................... 100,100 100,000 ------------------- ------------------- Total current liabilities............................. 225,008 100,000 Long-term debt............................................................ 932,002 928,030 Deferred tax liability.................................................... 379,095 384,505 Other liabilities......................................................... 38,262 42,004 Stockholders' equity.................................................... 1,661,664 1,680,480 ------------------- ------------------- Total liabilities and stockholders' equity............ $ 3,236,031 $ 3,135,019 =================== =================== (1) Marketable securities and current liabilities at March 31, 2004 reflect an additional $124.9 million due to an accrual for the purchase of a treasury bill on March 30, 2004 which was settled on April 1, 2004. DIAMOND OFFSHORE DRILLING, INC. AND SUBSIDIARIES AVERAGE DAYRATES AND UTILIZATION FIRST QUARTER FOURTH QUARTER FIRST QUARTER 2004 2003 2003 ----------------------------------------------------------------------------------------------------------------------- DAYRATE UTILIZATION DAYRATE UTILIZATION DAYRATE UTILIZATION - ------------------------------------------------------------------------------------------------------------------------ (Dayrate in thousands) HIGH SPECIFICATION FLOATERS $93 77% $97 84% $94 83% OTHER SEMISUBMERSIBLES $57 66% $56 69% $62 43% JACK-UPS $36 85% $30 72% $28 68%