thank you for visiting this blog, I want to share knowledge about the offshore structure to you, especially for some people who arestudying offshore structure....
- Offshore Structure
Types of offshore structures used during this time very much, but some offshore structure which is currently being used for explorationand exploitation of oil and natural gas. "jacket" is one of the offshore structure being developed for exploration and exploitation of oil and gas companies operating in the shallow sea and the seais a basic thick, soft and muddy. After the "jacket" was placed in the desired position, the pile is then inserted through the foot of the building and driven by "hammer" to penetrate the hard ground and then installed and welded decks.
Jacket Types Offshore Structure
- The Main Component Of Jacket Structure
jacket structure is divided into 3 (three) main components, where each component has different functions. three components are:
- Deck : This component serves to support equipment, drilling and activities undertaken over the water. decks can be divided into several levels according to the needs and functions needed. several levels of decks are : Main Deck, Cellar Deck, Mezzanine Deck, Upper Deck
- Jacket : This component serves to protect the pile to remain in position. support the deck and protect the support sub-conductors and other structures such as boat landings, barge bumpers and more. The main element jacket structure is as follows: jacket legs, braces (vertical, horizontal, and diagonal), joint (a meeting between jacket legs and braces), Boat landing, brage bumper, riser, conductor bracing, mud-muts, and others
- Fondation : a pile which is placed in a jacket leg and will be anchored on the seabed. between pile grouting is sometimes done to increase stiffness and to pile and jacket together. Pile skirt and sleeves are always given a filler (grouting).
Jacket is poles around the exploratory wells that protect pumps, drilling wells and the other. fitted jacket from the mudline to the deck substructure. Jacket legs will direct the pile during pile erection. Jacket, including fundamental structural elements on a platform that gives support to the anchoredship collision, corrosion protection system, navigation system etc.
- Composition of the framework at the foot of jacket
jacket legs are connected to each other and bound by 3 (three)types of claimant, namely:
- Diagonal bracing in the vertical plane
- Horizontal bracing in the horizontal plane
- Diagonal bracing in the horizontal plane
- In addition the bracing system has 3 (three) functions:
- Help move the horizontal loads on foundations
- Provide structural integrity during fabrication and installation
- Support the anode corrosion and head of conductor and continuethe forces generated waves into the foundation
Braces in the form of vertical, horizontal, and diagonal along with the jacket legs to form a separate power system. These systems distribute the load and stiffness of the force platform to the foundation. There are many different types of brace as follows:
- types 1. Form a pattern of "K" brace
This type has a number of meeting points sticks (joints) is much less. not symmetrical and has no system redundancy. And is usually used on sites that do not require high stiffness and no seismic force - types 2. Form a pattern of "V" brace
This type of joint on a bit and do not have a redundancy system. do not have a good load transfer system from one level to another level - types 3. Form a pattern of "N" brace
This type of system has no redundancy, buckling failure on one stempress can cause a failure in another shaft (structurecollaps) - type 4. form a pattern of "V" brace and "X" brace
This type is used in locations that are not in, have a symmetrical shape, redundancy, and sufficient ductility, the amount of joints more - type 5. form pattern of all "X" brace
This type has horzontal stiffness, ductility and high redundancy, the amount of joint so that it takes a lot more welding, widely used indeep-sea location and seismic prone areas
