Petroleo Brasileiro S.a. - Petrobras

Daniel Monteiro Pimentel

Mario Germino Ferreira Da Silva

Roberto Rodrigues

Fernando Antonio Moreira Da Silva

Valtair Marcos Cristante

Tiago Cavalcante Freitas

Patricia Braga Gusmao

Leandro Fernandes Telles

Renato De Freitas Soares

Lilia Naveira Bukahi

Carlos Alberto Bandeira Ribeiro

Marcelo Almeida Gomes

Tatiana Pitchon Sampaio

Pedro Andre Nogueria Souza De Oliveira Vale

Bernardo Caldeira Dias

Everton Da Rocha Nascimento

Thiago Da Costa Ribeiro

Geraldo Marcel Gomes Calil

The present invention relates to a system and process for assisted autonomous treatment for removing and/or inhibiting scale with desulfated seawater on pre-salt production platforms, using production facilities and injection water, without the need of using a stimulation vessel or a workover rig.

Assisted autonomous treatment system and process in pre-salt production platforms, and their uses

The present invention provides a nonresident system for depressurizing subsea apparatus and lines comprising a depressurizing tool () adapted for being coupled to an ROV interface () of a subsea apparatus, wherein the depressurizing tool () is coupled to an ROV (), wherein: the ROV interface () comprises a first pipeline () for connection to a first hydrocarbon transport line (), a second pipeline () for connection to second hydrocarbon transport line (), and a connection mandrel (); and the depressurizing tool () comprises a suction line () adapted for being connected to the first pipeline () for connection to the first hydrocarbon transport line; a discharge line () adapted for being connected to the second pipeline () for connection to the second hydrocarbon transport line; a pump (); and a connector () adapted for being connected to the connection mandrel () of the ROV interface (). A method is also provided for depressurizing subsea apparatus and lines, comprising the steps of: removing a blind cap () from an ROV interface () with aid of an ROV (); coupling a depressurizing tool () to the ROV interface () of a subsea apparatus (); suction and removal of fluid from a first hydrocarbon transport line, wherein the first hydrocarbon transport line comprises hydrate formation; and pressurizing and reinjecting the fluid into a second hydrocarbon transport line.

Nonresident system and method for depressurising subsea apparatus and lines

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Rio de Janeiro, Brazil

Daniel Monteiro Pimentel