JPH0255320B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a submarine feed hose mooring device for feeding fluid between equipment installed on the seabed and offshore facilities by a feed hose disposed between them.

Conventionally, equipment installed on the seabed, for example, when sending fluids such as crude oil or natural gas from equipment attached to a submarine oil well to offshore facilities such as ships anchored on the sea, or for driving various equipment installed on the seabed. When supplying driving fluids to equipment, a hose for supplying these fluids was placed separately between the equipment on the seabed and the offshore facility, but the part of the hose near the sea surface was Especially susceptible to the effects of waves and wind,
As a result, the hose sways and bends, subjecting it to repeated loads that cause it to fatigue and significantly shorten its useful life.In addition, when evacuating offshore facilities during stormy weather, the hose must be removed from the equipment installed on the seabed and the entire hose must be pulled up from the seabed. Therefore, removing and pulling up the hose required a great deal of effort and time. Furthermore, since the connecting portion between the hose and the submarine equipment is located deep under the sea, maintenance and inspection of the connecting portion is difficult.

Analyzing these difficulties, we found that the part of the hose near the sea surface is particularly susceptible to fatigue because that part is not supported by a rigid body and is left to bend freely due to waves, wind, etc. It is believed that there is. Additionally, the reason why hoses require a great deal of effort to remove and pull up during stormy weather, and maintenance inspections are difficult, is because the connections between hoses and submarine equipment are located on deep seabeds that are far away from offshore facilities. This is thought to be due to the fact that it is located in

Therefore, in order to solve these technical problems, the present invention moored a buoy in the sea at a depth where it is hardly affected by waves, fixedly installed a hose connection device for communicating fluid on the buoy, and installed it in a marine facility. A lower end of a rigid body whose upper end is firmly supported so that it can be moved up and down is removably connected to the hose engagement device, a first feed hose is disposed between the hose connection device and the device, and A lower end of a second feed hose whose upper end is supported by the offshore facility so as to be operable to move up and down is detachably connected to the hose joining device, and the second feed hose is supported along with the rigid body. It is configured to allow

Therefore, the following effect is achieved.

The second feed hose, which is affected by waves, wind, etc., is supported along with a rigid body firmly supported by the offshore facility, and does not bend easily even if external forces such as waves, wind, etc. are applied to it. Therefore, it is hardly subjected to repeated loads. The buoy and the first feed hose moored in the sea are hardly affected by waves even in rough weather and always remain stationary at a fixed position in the sea. When evacuating a marine facility, the lower end of the rigid body and the second feed hose are connected from the hose connection device of the buoy moored in shallow water, that is, in the sea at a depth that is almost unaffected by waves. The lower end is removed, and the hose and rigid body are raised together into a marine facility and moved to a safe sea area. After the sea has calmed down, the opposite process is carried out. Also,
Maintenance and inspection of the connections for attaching and detaching the hose coupling device and the rigid body or second feed hose is performed up to a shallow underwater buoy close to the offshore facility.

Next, embodiments of the present invention will be described based on the drawings.

Wire rope 2 on the heavy shogun 1 that has been deposited on the seabed B
The buoy 3, which is moored at a deep water position where it is hardly affected by wind and waves, is equipped with a hose connection device 4.
is fixedly installed, and the other end of the first fluid supply hose 5 has one end attached to the joining device 4, and the other end is connected to equipment 6 installed on the seabed, such as equipment for collecting crude oil or natural gas from an oil well mouth, etc. A second hose connected to equipment for collecting seabed resources, etc., and whose upper end is supported by the offshore facility 7 moored on the sea so that it can be raised and lowered, and whose lower end is detachably connected to the hose joining device 4.
The supply hose 8 is supported by the above-mentioned offshore facility 7 along with a rigid body 9 whose upper end is firmly supported so that it can be moved up and down. The lower end of the rigid body 9 is detachably connected to the hose joining device 4.

Therefore, to explain the case of pumping up a fluid such as crude oil or natural gas from a submarine oil well, the fluid collected by the pumping device 6 installed on the seabed is fixed to the buoy 3 via the first supply hose 5. It flows into the second feed hose 8 via the provided hose connection device 4 and is fed to the oil storage tank of the offshore facility 7.

Further, the driving fluid, etc., to be supplied to the equipment 6 installed on the seabed is connected to the pump of the offshore facility 7 by the first and second supply hoses for supplying the driving fluid, which have the same configuration as described above. sent through the opposite route,
It is refluxed through the same route as above.

Note that the symbol S represents the sea surface.

As described above, the present invention moors a buoy at a deep water position where it is almost unaffected by wind, waves, etc., and uses the buoy as a so-called relay station, which is conventionally placed independently between offshore facilities and equipment on the seabed. The hose was divided into an upper and a lower part, and the second upper supply hose was supported along with a rigid body firmly supported by the offshore facility. This prevents fatigue and damage under load, significantly extending the service life. In case of stormy weather, the part located in the deep sea below the relay station, that is, the buoy and the first feed hose, remain as they are, and only the part located in the shallow sea above the buoy, that is, the second hose and the rigid body, remain as they are. The work can be done extremely easily and quickly since it can be removed and taken up with the ship to a marine facility for evacuation.
Furthermore, since the connection part for attaching and detaching the hose joint device and the rigid body or the second feed hose is located at a much shallower depth than the seabed, it is easy to attach and detach them, and to lift and lower them, and to maintain them. Inspections can also be carried out without difficulty. The present invention exhibits excellent effects particularly as a crude oil production facility on the seabed in deep water.

[Brief explanation of drawings]

The drawing is a schematic front view showing an embodiment of the present invention. 3...Buoy, 4...Hose joining device, 5...First feed hose, 6...Equipment installed on the seabed, 7
...Marine facility, 8...Second feed hose, 9...
Rigid body.

Claims (1)

[Scope of Claims] 1. A device for transmitting fluid between equipment installed on the seabed and offshore facilities using a supply hose installed between them, which is located in the sea at a depth where it is hardly affected by waves. mooring a buoy, fixing a hose connection device on the buoy for communicating fluid, and removably connecting the lower end of a rigid body whose upper end is firmly supported to the offshore facility so that it can be raised and lowered to the hose connection device; A first feed hose is disposed between the hose joint device and the equipment, and a lower end of a second feed hose whose upper end is supported by the offshore facility so that it can be raised and lowered is connected to the hose joint device. A submarine feed hose mooring device, characterized in that the device is configured to be detachably connected and to support the second feed hose along with the rigid body.