The subsea systems discipline area requires a thorough understanding of the operational requirements to be met through the project lifecycle, and, in turn provides design input for field development planning decisions. The goal is to specify the functional performance requirements of the equipment to be procured from specialist manufacturers and vendors.
The equipment package items are procured as bespoke engineered items forming sub systems from a limited number of specialist vendors based on existing qualified designs. These items are progressively integrated into more comprehensive sub systems that can be tested, delivered and installed by suitable installation contractors. There is only a very limited amount of field fabrication involved, it is more a case of installing, assembling and interconnecting numerous dedicated equipment packages in the subsea field environment.
These dedicated packages are ultimately built up into a subsea production system capable of monitoring and safely controlling the production of hydrocarbons from wells, and delivering streams of hydrocarbons and other fluids to and from pipelines leading to a host facility where any necessary processing can take place. The fluid streams may include varying mixtures of oil, gas, water and various production chemicals which may flow to and from the host facility, to deliver saleable products, to inject water and/or gas back into the reservoir and to dispose of waste streams in the required manner.
The host facility also provides the necessary power and other utilities to enable the subsea system to perform these functions and a location from which these tasks and functions can be remotely controlled and managed by field personnel. The pipelines, and in some cases risers, form essential elements within the overall hydrocarbon production system, but they are generally treated as separate assets due to the significantly different nature of their design and construction.
The host facility may be a fixed or floating offshore structure, or an onshore plant and the length of the pipelines and risers may vary from hundreds of metres to hundreds of kilometres.
General understanding of, and, the ability to engage meaningfully with specialist practitioners in the areas of:
Peritus’ experienced staff also have sound detailed working knowledge of the following areas:
Experience has been gained working on projects located in extreme environments such as the West of Shetlands, Arctic, Caspian Sea, Sakhalin Island and in the ultra deep waters of the Gulf of Mexico. Equipment has been specified for sour and sweet service as well as HPHT systems (temperature >130°C and pressure <103 MPa).
Peritus personnel have experience with application of the principal industry codes relevant to design and operation of subsea systems such as:
NORSOK Drilling, Structural and Subsea standards and ASME B31.3
The principal tools required to perform subsea systems work are human and intellectual, such as, technical understanding, experience, skill and the ability to analyse and decide between competing approaches. A number of software tools are available within Peritus to assist the intellectual effort, these being analytical tools and administrative or management tools.
Examples of the analytical tools used by Peritus are as follows:
In addition to discipline engineering roles, Peritus can and has provided Project Management Services in the form of provision of owners engineering teams, supervising the EPCIC contractors during Develop and Execute. Peritus are able to use their own management and project support systems if required. Peritus’ Management Systems are certified to ISO 9001.