What is a caisson offshore?
Caissons on an offshore platform are open ended vertical tubes that can house internal pumps and their risers. They generally extend from the lower deck of the offshore structure to 20 – 40m below the ‘splash zone’ or seawater level. Caissons can house safety critical equipment such as firewater pumps.
What is a caisson platform?
Caissons: Are open-ended large tubular members supported by clamping to jacket members and connected to topside utilities like open drain and seawater service. From: Practical Engineering Management of Offshore Oil and Gas Platforms, 2016.
What is disposal caisson?
DISPOSAL CAISSON (un-plated caisson) The unplated Drain caisson is a vertical oil/water separator. Length in excess of 10 feet does not increase the oil removing efficiency of the device; however, increasing the length does increase the retention time.
What are caissons used for?
A Caisson is a watertight structure used for retaining water in order to work on the foundations for bridges, piers, and other structures. Generally speaking, the water is pumped out to create a completely dry work environment.
What is the difference between piles and caissons?
Pile Foundation Caissons are watertight structures made up of wood, steel or reinforced concrete built above the ground level and then sunken into the ground. Pile foundation is a type of deep foundation, in which the loads are taken to a low level by means of vertical timber, concrete or steel.
How are caisson foundations constructed?
Caisson foundations, also known as pier foundations, are prefabricated hollow substructures designed to be constructed on or near the surface of the ground, sunk to the desired depth and then filled with concrete, thus ultimately becoming an integral part of the permanent structure.
What is a sump caisson?
SUMP CAISSONS HAVE BEEN USED IN THE OIL AND GAS INDUSTRY SINCE THE EARLY 1970’s, TO CONTAIN AND TREAT OPEN AND CLOSED DRAIN STREAMS, AND ACCEPT PRODUCED WATER STREAMS ON OFFSHORE PLATFORMS. THE SEGREGATED DRAIN AND PRODUCED WATER STREAMS ARE DIRECTED TO THE CAISSON FOR CONTROLLED TREATMENT AND DISPOSAL.
What is a caisson in oil and gas?
Caissons are usually constructed from carbon steel and are generally classed as part of the platform structure, rather than topside plant. They are guided subsea by external welded or structure attached guide supports.
Why caisson foundation is used?
Caisson foundation is Most often used in the construction of bridge piers & other structures that require foundation beneath rivers & other bodies of water. This is because caissons can be floated to the job site and sunk into place.
What are the type of caissons?
The four main types of caisson are box caisson, open caisson, pneumatic caisson and monolithic caisson.
How caissons are installed?
To install a caisson in place, it is brought down through soft mud until a suitable foundation material is encountered. While bedrock is preferred, a stable, hard mud is sometimes used when bedrock is too deep. The four main types of caisson are box caisson, open caisson, pneumatic caisson and monolithic caisson.
Sump Caisson : The separation in the Sump Caisson typically occurs beneath the water surface in the engineered “plated section” and the treated water is discharged through the bottom of the caisson.
What are the advantages of sump caisson in water treatment process?
The water treatment process with sump caisson possesses the advantages of economical, simple and easy to operate, which has a wide application prospect. At present, sump caisson has been applied to the open drain system on the South China Sea offshore platform.
What is the retention time of a sump caisson?
The Sump Caisson is typically designed with a retention time of minutes with a removal efficiency ranging from 50-100 microns pending on disposal requirements. Contact For More Technical Details: [email protected]