Sleipnir Offshore offers unparalleled value to its clients by providing the right combination of underwater diving and ROV survey solutions to meet specific project requirements. Our comprehensive suite of services ensures precision and accuracy for both nearshore and offshore operations.
Our survey capabilities include:
- Hydrographic Site Survey (Nearshore / Offshore): This is the fundamental service of mapping and measuring the features of a body of water, including the seabed, coastlines, and underwater structures. It provides crucial data for a variety of projects, from navigation and charting to construction and environmental planning. Sleipnir’s capability covers both nearshore areas (close to the coast) and deeper offshore environments.
- Position fixing on land and water: This service is about accurately determining the precise location of a specific point or object. On land, it might involve using GPS and surveying equipment to establish a project’s coordinates. On water, it’s used to pinpoint the exact location of a vessel, a subsea structure, or a survey target, which is essential for all types of marine operations.
- Monitoring of dredging operations: Dredging is the process of removing sediment from the bottom of a body of water. This service involves using hydrographic and acoustic sensors to monitor the dredging process in real-time. It ensures that the correct amount of material is being removed, that the dredging is happening in the designated area, and that the project is progressing according to plan.
- Land-based data processing: After a survey is conducted, a vast amount of data is collected. This service involves taking that raw data and processing it using specialized software on land. The data is cleaned, analyzed, and converted into usable formats like charts, 3D models, and detailed reports, which clients use for decision-making and project planning.
- Environmental bottom surveys: These surveys are conducted to assess the environmental condition of the seabed. They can involve collecting physical samples of the sediment, using remote sensing to identify marine habitats, or surveying the presence of marine life. This service is crucial for environmental impact assessments before a project begins and for monitoring after it’s completed.
- Groundwater surveys: This service involves using geophysical techniques to locate and map groundwater resources, often in coastal or nearshore areas. While typically a terrestrial service, it can be relevant for coastal civil engineering projects that involve interaction with the water table.
- Seabed survey: This is a broad term for mapping the physical features and composition of the ocean or lake floor. It can include mapping topography (hills, valleys), identifying rock formations, and locating buried objects. The information is vital for planning the placement of pipelines, cables, and foundations for offshore structures.
- Subsea pipeline survey & positioning: This service is a specialized form of seabed survey focused specifically on pipelines. It involves a range of activities, including surveying the planned route, inspecting the pipeline after it’s laid, and using acoustic and satellite positioning systems to ensure the pipeline is placed exactly where it needs to be. Accurate positioning is critical for connecting pipelines to other subsea infrastructure.
- Umbilical installation survey & positioning: An umbilical is a crucial link between a surface vessel or platform and subsea equipment, containing power cables, communication lines, and hydraulic fluid lines. This service involves conducting precise surveys before, during, and after the installation of these umbilicals. Positioning ensures that the umbilical is laid along the correct route and secured properly on the seabed, avoiding obstacles and meeting design specifications.
- Pipeline route survey: This is a comprehensive survey performed before a subsea pipeline is installed. The goal is to identify the most suitable and safe route for the pipeline. This includes mapping the seabed topography, identifying potential hazards (like rock outcrops or existing infrastructure), and assessing seabed conditions to ensure a stable foundation for the pipeline.
- Pre-lay survey and Post Lay survey: These are two distinct but related services for pipeline and cable installation.
- Pre-lay survey: A detailed survey conducted immediately before a pipeline or cable is laid on the seabed. It provides a final check of the planned route, ensuring that no new obstacles have appeared and that the seabed is ready for installation.
- Post Lay survey: A survey conducted after the pipeline or cable has been installed. It verifies that the infrastructure was laid correctly, checks its final position, and inspects for any damage that may have occurred during installation.
- Drilling rig, barge & anchor handling tug positioning: This service is essential for the safe and precise movement and anchoring of large vessels. It involves using advanced positioning systems to guide drilling rigs, barges, and anchor handling tugs to their exact coordinates. For drilling rigs, this ensures the well is drilled in the correct location. For barges and tugs, it is critical for safely deploying anchors and maintaining a stable position.
- Jacket / Platform & subsea structure installation: This involves providing real-time survey and positioning support during the installation of large, heavy subsea structures like jackets (the steel framework for platforms) and other components. The service ensures that these structures are lowered and placed precisely onto their foundations on the seabed, which is critical for their stability and long-term integrity.
- FPSO installation: An FPSO (Floating Production, Storage, and Offloading) vessel is a massive ship used for processing and storing oil and gas. Its installation requires highly accurate positioning. This service involves guiding the FPSO to its final location and assisting with the precise mooring and connection to subsea infrastructure. Accurate positioning is vital to ensure the vessel is securely anchored and properly aligned with risers and flowlines.
- Decommissioning survey & positioning: When offshore assets reach the end of their operational life, they must be safely decommissioned. This service involves conducting surveys to map the assets to be removed and providing precise positioning support for the vessels and equipment used for the removal process. This ensures that the structures are dismantled and removed without causing damage to the surrounding environment or other subsea infrastructure.
By combining cutting-edge technology with extensive expertise, Sleipnir Offshore delivers a complete solution for all subsea survey needs, ensuring project success from start to finish.