Energies for the future

OUR PROJECTS – CASE STUDY – Oil & Gas

MELLITAH OIL & GAS

DETAILS

Client name: MELLITAH OIL & GAS
Project name: FAST MOVING WORKOVER RIG
Duration: 2300 man-days

Project Description

This project was performed in 2021-2022 for the Libyan company MELLITAH OIL&GAS.
As part of the development of the block NC 41, MELLITAH OIL & GAS asked DOLFINES to design a new workover rig able to operate on two new production platforms.
The purpose of this project was to perform the FEED detail of a modular rig in coordination with the team in charge of the design of the platforms.

The rig shall be designed to perform the drilling of the tie‐back, the drilling of the reservoir section and the final completion while the previous phases are drilled from a semisubmersible.

Activities / Tasks and Solutions developed by Dolfines

This study covered all the disciplines: layouts, process, structural calculation, electrical sizing, HSE studies and commissioning.

Several constraints have determined the design of the rig.
The installation on two different platforms, in two different environments, induced a lot of restrictions in term of accesses, arrangement and simultaneous operations.
Furthermore, the platforms cranes in charge of the installation of the rig were positioned in two symmetrical locations, which induced increased limitation on the size of the modules.

Project Results

DOLFINES has produced a complete design file to allows competition between international rig suppliers to participate in the EPIC tender of the rig. This file is composed of all the specifications, drawings, calculations notes, lists, reports or philosophy which define the rig and its operations.

Contractual document and cost estimate have also been issued to guide the client in the next step of the project.