|
Jack-Up Rigs
Jack-up rigs are often used for shallow wells. Standing on three (sometimes four) legs secured to the ocean floor, the oil platform can travel up and down the legs as water levels shift. The “jacking” of the platform up and down is where this technology gets its name. Semi-Submersible Platforms This type of drilling platform is a massive floating vessel. The platform rests on huge columns that are secured to large pontoons. It uses dynamic positioning systems (thrusters) or anchors to stay in place during drilling. Among floating rigs, semi-submersibles are considered the most stable. Drillships Drillships are now the most in-demand drilling rigs. Of the drilling platforms currently under construction, most of them are drillships, because they can deploy faster. Tension-Leg Platforms Tension-leg platforms are floating platforms tethered to the seabed. They operate in deep water (not shown in diagram). |
|
|
The Z-210 is the latest Zentech design, self-propelled, self-elevating, DP-2 (dynamically positioned) Liftboat designed for 280’ water depth, 55 C° rating, cutting edge technology for well interventions.
Work scope: Review of clients specifications and plans, and develop electrical / automation system solutions and priced technical offer. |
|
|
Before Transocean's Sedco 706 set course for Brazil to drill for oil on a five-year contract with Chevron, she underwent a year of upgrades at the Keppel FELS Yard in Singapore. The aim was to retrofit her into a dynamically positioned (DP) class 2 semi-submersible rig, capable of operating in moderate environmental conditions and in water depths down to 6500ft. A key milestone was to upgrade the electrical system to be more fault tolerant.
Work scope: Design, supply and installation support of MV/LV switchgear, generator control system, drilling system and propulsion system. During this time of the upgrade (which was for the most part considered a rebuild), we worked in close collaboration with Transocean and Aspin Kemp and Associates, to design, build and test the new fault tolerant electrical generation and propulsion systems. The project outcome was such a success that the design concepts have been implemented by many drilling contractors, and used in many new builds. The new "Generation 6" power system was a great success. |
|
|
Transocean embarked on a newbuild program, where the Discoverer Clear Leader and her 4 sister ships Discoverer Americas, Discoverer Inspiration, Discoverer Luanda, and Discoverer India. And later the Discoverer Enterprise (shown), and her two sister ships Spirit and Deep Seas.
There are six thrusters, each rated at 5222kW and producing a thrust of 89 tonnes approximately. The power for the thrusters, drilling equipment and ship’s services is generated at 11kV by six diesel driven generators, four rated at 7030kW each and two at 4690kW each. The medium voltage switchboard consists of two completely independent sections each housed in a separate compartment but connected by a cable tie with breakers at each end. Scope of Work comprised the design, supply and installation / commissioning support of the:
Key to the success of the electrical switchgear, is the Factory Acceptance Testing that was performed prior to the switchgear being delivered to the vessel for installation. |
|
|
The Petrobras rig is located 110km off Brazil’s coast on the southern tip of the Campos Basin and it completes the production system for the Papa Terra field where it is operating alongside the P-63 FPSO.
Petrobras operates the Papa Terra field in partnership with Chevron – Petrobras 62.5%, Chevron 37.5%. The topside of the P-61 platform was built at the Keppel Felds shipyard in Singapore. Its hull and mating operation were completed at the Brasfels shipyard in Angra dos Reis in the south of Rio de Janeiro State. The work scope of this project was ran from Bid Development through to commissioning. It included the supply of:
As the Bid Development Manager (Houston), a comprehensive bid for the design and supply of three eHouses was developed for FloaTEC, a JV between McDermott of Houston an KeppelFELS of Singapore As Engineering Manager, the project was relocated to Rio de Janeiro, where Detailed Engineering was completed by engineers and designers at the Siemens offices. As Electrical Site Manager (Batam), oversight of the eHouse construction and electrical outfitting took place. A team was assembled from expats and local tradespersons to complete mechanical completions and 1st stage of commissioning. The eHouses were then shipped to the Singapore shipyard. As Electrical Commissioning Manager (Singapore), oversight of eHouse installation took place, and the project was finally commissioned to the platform. |
|
|
The BW Catcher has a length of 240m, a width of 50m and a depth of 27m. Weighing over 56,000t, the FPSO has a processing capacity of 60,000bopd and a storage capacity of 650,000 barrels (bbl). The vessel can accommodate up to 120 workers and has a design life of 20 years with continuous operations.
KONGSBERG scope of supply for the FPSO includes complete E-House and Electrical Equipment. KONGSBERG will supply K-Chief 700 marine automation system for vessel control, K-Safe for fire, gas and safety for Process Shut Down (PSD) and Emergency Shut Down (ESD), K-PRO for process control, and a fire and gas detection system. Scope of Work: An Independent Project Review comprising an expert team was assembled for the purpose of a reviewing and reporting on the state of the current construction.
The Electrical System review comprised the:
The Integrated Control and Safety System (ICSS) review include all aspects of the ICSS and all operator interfaces. The ICSS provides monitoring, control and safety functions for the process, utility and marine systems from a Central Control Room (CCR). It is divided into the following:
|
|
|
his vessel was designed for Technip (UK) and was constructed at STX Heavy Industries
(Korea) and is the world’s largest purpose-built ultra deepwater pipelay and subsea construction vessel. Pipelay: It can carry out rigid pipelay (reeling) of up to 5,500t of 4in to 18in pipe or 4,000t of 4in to 26in rigid pipelay (J-Lay). Alternatively, it can lay up to 5,764t of 2in to 16in flexible pipe. Its maximum payload of 11,023t can consist of either two rigid reels (5,511t), flexible lines in two carousels (2,000t and 1,500t), eight portable 300t reels, 4,000t rigid pipe strings or 3,000t of subsea structures. The vessel has twin 2,800 ton reels and has a top tension capacity of 450 tons for laying rigid steel pipes and flexible products up to 18” in diameter through a dedicated lay tower installed at the stern. The vessel is equipped with a 150 ton crane, a PLET (pipeline end terminations) handling system and accommodation for 140 people. Generation: The CSO Deep Blue has a total installed normal power of 33.6MW from 6 generators, at 6.6kV (45,000hp) and 1MW at 440V emergency power. It has a transit thrust power of 14MW (three thrusters in use) or 25.6MW (eight thrusters in use) for DP. Thrusters: the CSO Deep Blue is equipped with eight thrusters:
Scope of work: Prior to arriving at the vessel (Tampa, Florida), an "Electrical Health Plan" was developed by our team. It included the scope of electrical works, methods of testing, and acceptance criteria. The inspection and testing of main electrical equipment, comprised:
All windings and insulations were checked using high voltage potential testing to determine insulations and polarization values. Conductivity testing was performed on Vacuum Contactors and other low voltage circuit breakers. Protective relay injection testing was performed using Omicron & Sverker current injection test sets. It was reported that one generator was not taking load past 75% capacity, and that the Automatic Voltage Regulator was swapped out with no improvement. Our inspections identified damage to the exciter. After a complex repair in-situ, the generator was placed back in service and performed as required. |
|
|
he Multi Purpose Construction Vessel (MPCV) Ocean Intrepid DP-2 barge provides a large working platform for a broad range of offshore operations. With a 400T motion compensated crane, over 22,000 sq ft total deck space and a 978 sq ft moonpool, Ocean Intrepid is an extremely cost effective work platform for extended duration offshore operations.
Scope included the conversion of an Ice Breaking Barge to a dynamically positioned pipelay vessel. EIT scope comprised new electrical, automation and telecommunications design, that included the installation and commissioning of:
A Kongsberg Dynamic Positioning system was installed and interfaced to the electrical generation and propulsion system. Temporary transformers 6.6kV/600V and 600V load banks were installed on the aft deck to do full load bank testing. The vessel conversion to DP-2 and sea trials met with ABS approvals. |
Figure 1 - Vessel under conversion
Figure 2 - Vessel in operation
|
|
Originally a Ukrainian Para Military Vessel, that was acquired by NAVSEA for conversion to a full NAVSE vessel.
This vessel was lengthened by a mid-body section (65m), and converted from 380V/50Hz (East European Standard) to 480V/60Hz (North American Standard). It was outfitted with new Rolls Royce Gas Propulsion Turbines. The scope comprised:
|
|
|
The Bourbon Opale well innervation vessel was built in Norway, and operates near Ciudad Del Carmen in the Gulf of Mexico. The vessel was incomplete in a few areas, including the process deck due to supply chain issues in receiving materials.
Scope of work: The incomplete process piping was identified and sources in Mobil Alabama. This was XS piping suitable for 5,000psi and 10,000psi. Piping spools were made up, preheated and welded using shielded metal arc. All welding and X-Ray imagery was done according to ABS surveyor. A piping and weld team were provided to travel with the vessel to Ciudad Del Carmen. Two flexible pipe spools were installed for connections between the wellhead and the process system. The vessel was fitted with a Kongsberg ICSS and DP2 control system (in Norway). Final testing of process sensors and actuators was completed in collaboration field service technicians, to ensure that all sensors and actuators were fully functional. |
"Bourbon Opale" FPSO (Well Intervention) [Bourbon Offshore]
|
