What is an offshore jacket?
Definition. Jacket refers in the oil and gas exploration and production to the steel frame supporting the deck and the topsides in a fixed offshore platform.
What do you mean by offshore structure?
Offshore structures consist of offshore oil platforms and offshore wind turbines (OWTs). They are special type of complex structures. The offshore oil platforms are large-scale structures situated in the sea. They can accommodate the facilities and equipment to drill, extract, and process oil and natural gases.
What are the types of offshore structures?
5 most common offshore structures are described below:
- Shallow Water Complex.
- Gravity Base.
- Compliant Towers.
- Floating Production. Floating Production, Storage and Offloading (FPSO) Tension Leg Platform (TLP) SPAR.
- Subsea Production Systems.
What materials are used for offshore structures?
Marine structures, such as ships and offshore structures, have traditionally been made of steel. The usual joining method is fusion welding where the joining material is quite similar to the base material, thus producing a nearly homogeneous material across the joints.
What is a jacket foundation?
jacket foundation means a lattice type structure constructed of steel and additional equipment such as, J-tubes, corrosion protection systems and access platforms attached to the sea bed by means of either a suction bucket or piles”
Why are offshore structures important?
They are more common in more exposed settings than in estuaries. Their main purpose is to reduce the rate of shoreline change or erosion by decreasing the wave energy reaching the shore through dissipation, refraction, or reflection of incoming waves (Nordstrom, 2000).
What is vertical offshore structure?
A vertical off-shore structure is built to withstand a maximum stress of 109 Pa. Is the structure suitable for putting up on top of an oil well in the ocean? Take the depth of the ocean to be roughly 3 km, and ignore ocean currents.
Why is steel used for offshore structures?
The metal is inherently resistant to corrosion, even in marine and coastal environments, and offers a high strength-to-weight ratio for infrastructural applications. Stainless steel also ensures a long design life along with impressive resistance to extreme pressure and high temperatures.
What is jacketed platform?
8.6, jacket platforms are one of the most commonly used fixed type of platform, about 95% of the offshore platforms in the world are using jacket platform. The platform is supported by steel space frame which consists of plate girder or deck truss structure supported by welded tubular that is piled to the seafloor.
What is foundation in wind turbine?
The main task of foundation of wind turbine is that it transfers and spreads the loads to the soil at depth. The vertical and horizontal forces which act on the turbine foundation are due to self-weight and wind respectively. The height of wind turbine tower varies usually from 40 m to 130 m.
What is onsite and offshore?
“Onshore” refers to “in the same country” ; People /Employees doing the work are in the same country as the customer/Client. “Offshore” refers to “in another country” ; People /Employees doing the work are in a different country from the customer/Client.
What is the structure called that pumps oil from the sea?
Oil platform
An oil platform, oil rig, offshore platform, or oil and/or gas production platform is a large structure with facilities to extract, and process petroleum and natural gas that lie in rock formations beneath the seabed.
What is fixed offshore platform?
A fixed platform is a type of offshore platform used for the extraction of petroleum or gas. These platforms are built on concrete and/or steel legs anchored directly onto the seabed, supporting a deck with space for drilling rigs, production facilities and crew quarters.
Why is steel used for oil rigs?
Offshore Steel Characteristics: High yield strength. Excellent weldability. Good internal soundness. Good resistance to brittle fracture (longitudinal and transverse)