Indicate by check mark whether the registrant files or will file annual reports under cover Form 20-F or Form 40-F. 

Form 20-F ___X___ Form 40-F _______

Indicate by check mark whether the registrant by furnishing the information contained in this Form is also thereby furnishing the information to the Commission pursuant to Rule 12g3-2(b) under the Securities Exchange Act of 1934.

Yes _______ No___X____

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Launching of Platform P-52

(Rio de Janeiro, June 14, 2007). – PETRÓLEO BRASILEIRO S/A - PETROBRAS, [Bovespa: PETR3/PETR4, NYSE: PBR/PBRA, Latibex: XPBR/XPBRA, BCBA: APBR/APBRA], a Brazilian international energy company, announces that the launching ceremony of platform P-52 took place today at the Brasfels shipyard in Angra dos Reis (state of Rio de Janeiro).

Operating at its maximum capacity, the unit of the semi-submersible type is able to process 180 thousand barrels of oil and compress 7.5 million m3 of natural gas. There is also a 1.8 million cubic meter compressor on standby to guarantee continuous gas flow.

Platform P-52 is a component part of Phase 2 of the Roncador Field Module 1 development program in the Campos Basin and is to be anchored in a water depth of 1,800 meters and interlinked to 29 wells (18 producing and 11 water injection wells). The off-take of oil and natural gas will be made through submarine lines.

Once work is completed, platform P-52 will undergo a phase of testing and adjustments before being towed into position in the Campos Basin for anchoring and well interconnection. Start-up up of operations in the Roncador Field is scheduled for September of this year.

The main construction contract for P-52 was signed in December 2003 The work commenced in May 2004, and the Platform hull arrived in Brazil in March 2006, to be integrated to the modules as of July 2006. The total construction period was 26 months.

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www.petrobras.com.br/ri/english
Contacts: PETRÓLEO BRASILEIRO S. A. – PETROBRAS
Investor Relations Department I Raul Adalberto de Campos - Gerente Executivo I E-mail: petroinvest@petrobras.com.br
Av. República do Chile, 65 – 22^nd floor - 20031-912 - Rio de Janeiro, RJ I Tel.: 55 (21) 3224-1510 / 9947

This document may contain forecasts that merely reflect the expectations of the Company’s management. Such terms as “anticipate”, “believe”, “expect”, “forecast”, “intend”, “plan”, “project”, “seek”, “should”, along with similar or analogous expressions, are used to identify such forecasts. These predictions evidently involve risks and uncertainties, whether foreseen or not by the Company. Therefore, the future results of operations may differ from current expectations, and readers must not base their expectations exclusively on the information presented herein.

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This press release may contain forward-looking statements. These statements are statements that are not historical facts, and are based on management's current view and estimates offuture economic circumstances, industry conditions, company performance and financial results. The words "anticipates", "believes", "estimates", "expects", "plans" and similar expressions, as they relate to the company, are intended to identify forward-looking statements. Statements regarding the declaration or payment of dividends, the implementation of principal operating and financing strategies and capital expenditure plans, the direction of future operations and the factors or trends affecting financial condition, liquidity or results of operations are examples of forward-looking statements. Such statements reflect the current views of management and are subject to a number of risks and uncertainties. There is no guarantee that the expected events, trends or results will actually occur. The statements are based on many assumptions and factors, including general economic and market conditions, industry conditions, and operating factors. Any changes in such assumptions or factors could cause actual results to differ materially from current expectations.

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