Key Points
ESPRIZ Funnel System can be used in any leakage point; including BOP, well or any part of a conduit or pipe. Whereas no principal change is required and only by changing the mechanical design according to the place, shape, depth and size of the leakage point, the funnel can be installed and collection of leaked oil will be feasible.
Channelizing and conducting the flow of oil mixed from the seabed to sea level.
The basics of the idea remain on the principle of difference of weight of two liquids; Oil and water.
Method (Figures B, C, D, E)
1- In this method, the leaked oil will be gathered under a funnel. Then the Oil will be conducted to the surface by one or several pumps to surface.
2- The difference of weight of oil and water will naturally drive the oil to the surface. This flow comes to help the task of pumps driving the oil to the surface.
3- The collected oil under the funnel will be pumped by a hydro pump installed on the top of the funnel to the sea level into a flexible tube.
4- A second pump installed on the sea level will load the oil into a FPSO or a tanker. This will also help in better performance of this flow.
The Funnel must most of time be floating and must not touch the seabed to stabilize the conditions of pressure and temperature and avoid the formation of hydrates. Although we need to use some other solutions like injecting Alcohol for preventing hydrate formation depending on the depth of water and temperature.
The whole system can be kept floated by a crane barge instead of using buoys.
Components required (Figure A):
1- Funnel: a funnel made of steel sheet with pyramidal form for ease of assembly and storage. The funnel can be in other forms too.
2- Buoys to keep the funnel and tubing or piping system floated.
3- Heavy anchors for fixing the funnel at required position.
4- Cables
5- Flexible tube or pipe(with or without flexible joints)
6- Valve
7- Hydro pump
8- Pump
9- FPSO, tankers
1- The funnel can be made of steel sheet in pyramid shape with rectangular base for easy and fast manufacturing and assembly. The funnel can be made in shipyards and assembled in target area.
2- The weight of funnel and anchors and the size of buoys must be calculated in a way to fix the floated funnel on top of leakage point.
3- As soon as all equipments are in place, the funnel will be immersed to the leakage area.
4-The immersion shall continue up to fixing the funnel over the leakage area.
5- The funnel must not touch the seabed.
6- The oil will be collected on topper part of funnel after installation. The pumping rate shall be regulated according to the conditions of leakage such as pressure, temperature and leakage rate per minute.
7- If any re-enforcement in pumping is necessary, one floating pump station can be installed in mid way also.
8- In deep seas whereas heavy weight of the flexible tube may cause troubles of being torn off or burst creating unsafe conditions, a steel belt or ring is to be put round the flexible tube at calculated distances and held by a steel wire, like a steel basket (as depicted in the picture below) to support the weight and further floating buoys to be fixed to the steel belts. (Figure D detail b)
9- To impeach hydrate formation in some cases, additives like alcohols/ steam or hot water can be thrown under the funnel