JP3492143B2 - Offshore mooring equipment - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an offshore mooring facility for mooring a ship on a floating platform for offshore oil production on the sea.

[0002]

2. Description of the Related Art As shown in FIG. 5 (plan view), a floating body 1 as a platform for oil production is moored to the seabed at the front by a mooring device 11 of a single-point mooring type, and waves 18, winds 19 and tidal currents 20 are provided. As a result, the ship (tanker) 2 moored to the floating body 1 for oil storage approaches the floating body 1 from the rear, but the mooring line 5 extending from the rear of the floating body 1 to the rear is used. When the work is to be transferred to the tanker 2, the pre-taking rope 6 connected to the tip of the mooring rope 5 is operated by the small work boat 16, the pre-taking rope 6 is first passed to the tanker 2, and then the mooring rope is passed through the pre-taking rope 6. The operation of pulling the tanker 5 up to the tanker 2 is performed, and as a result, as shown in FIG. 6, the tanker 2 is moored to the floating body 1.

[0003]

In the above-mentioned conventional offshore mooring means, since the work boat 16 is a small boat, when the wave height is about 3 m or more, the work boat 16 becomes violent and the mooring is increased. I can't work.

[0004] Thus, the single point mooring system 11 front
The mooring work of the ship 2 on the floating body 1 as a conventional oil production platform moored on the seabed is limited by the working limit of the work boat 16, and the floating body 1 and the ship 2 do not have a high wave height. However, berthing work may not be possible, and if the oil shipping work cannot be carried out according to the schedule, the oil production may be temporarily stopped, resulting in a decrease in the operating rate of the entire oil production system. become.

Therefore, according to the present invention, the front portion is attached to the one-point mooring device 11 .
As more to the rear of the submarine to the moored floating body can be adjusted access mooring to the ship approaching the rear part of the floating body
In addition, a swingable boom that can lift the tip of the mooring line
In addition, the rear part of the floating body is provided with the one-point mooring device.
Includes a side thruster over which are capable of turning on the left and right around, wave height was slightly higher efficiency at best safely performed so the mooring operations, and to provide offshore mooring facility.

[0006]

In order to solve the above-mentioned problems, the offshore mooring equipment of the present invention provides a ship which approaches from the rear to the rear part of a floating body moored to the seabed by a one-point mooring device at the front part on the sea. A mooring device for mooring, the mooring device being capable of extending from the rear part of the floating body to the ship behind, and hoisting the mooring line so that the tip of the mooring line is located behind the floating body. It consists of a swingable boom with a hanger attached to the rear part of the floating body so that it can be swung to the left and right, and the rear part of the floating body is moved leftward to the rear part of the floating body.
Alternatively, a side thruster is provided for turning to the right and adjusting the relative distance between the floating body and the ship.

[0007] In offshore mooring facilities of the present invention described above, when anchoring the ship the <br/> front at sea to the rear of the tethered said floating on the sea floor by a single point mooring system, the mooring line to the ship The access is appropriately adjusted by the swing position of the boom provided on the floating body and the swinging movement of the rear portion of the floating body to the left or right accompanying the operation of the side thruster provided at the rear portion of the floating body. , The operation of passing the mooring line hoisted by the boom to the ship will be performed accurately,
Since there is no need for support from a small work boat such as a conventional boat, there is no hindrance to mooring work even if waves occur on the water surface.

Further, in the offshore mooring equipment of the present invention, the boom is constructed so as to be capable of expanding and contracting with a sliding member capable of sliding in the longitudinal direction thereof, and the tip of the mooring line is provided at the tip of the sliding member. It is characterized in that a lifting tool is provided for hoisting the car through a pre-take rope.

As described above, the suspending member is provided at the tip of the sliding member which is capable of expanding and contracting the boom, and the pre-take rope at the end of the mooring line is hoisted through the suspending member. Then, due to the sliding action of the sliding member, the boom can be smoothly expanded and contracted, and the access adjustment of the mooring line to the ship approaching from the rear can be more appropriately performed. The mooring line is handed over to the ship, and then the mooring line is also easily handed over to the ship via the pre-take rope.

Further, in the offshore mooring equipment of the present invention, a distance sensor for measuring the relative distance between the floating body and the ship is provided at the rear portion of the floating body, and the side thruster receives a detection signal from the distance sensor. Is provided with a thruster control system.When such a thruster control system is provided, the side thruster is automatically controlled to adjust the distance between the rear portion of the floating body and the ship. Therefore, the initial operation of the mooring work can be performed efficiently and accurately.

If two side thrusters are arranged side by side at the rear of the floating body, the side thrusters are in a state in which thrusts are generated in opposite directions, and the thrusts are adjusted by adjusting the thrusts. Position adjustment by turning the rear part of the floating body can be promptly performed in response to changes in tidal current, wind and waves.

When the floating body is constructed as a platform for oil production on the seabed and a pipe for feeding oil to the tanker moored by the mooring line is equipped along the boom, the boom is the tanker. Not only is it useful for mooring work, but the delivery of oil produced from the seabed
Pipes along the boom will be used to facilitate smooth transfer from the above platform to the tanker.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a rear side view of a floating body equipped with offshore mooring equipment as the first embodiment of the present invention, and FIG.
FIG. 3 is a plan view showing a state in which a ship is moored to a floating body equipped with the equipment of FIG. 1, and FIG. 3 is a plan view schematically showing a floating body equipped with offshore mooring equipment as a second embodiment of the present invention. FIG. 4 is an explanatory diagram showing a modification of the side thruster installation in each of the above-described embodiments.

[0014] First will be described a first embodiment of the present invention, as shown in FIGS. 1 and 2, the floating body 1 as offshore oil production platform moored to the seabed front at one point mooring system 11 at sea , A mooring device for a ship (tanker, supply ship, etc.) 2 moored to the floating body 1 is provided at the rear part, and the mooring device extends rearward with the base end locked to the rear part of the floating body 1. The mooring rope 5 and the swingable boom 4 mounted on the rear portion of the floating body 1 so that the mooring rope 5 can be lifted and can be swung left and right by a drive mechanism (not shown).

In the present embodiment, the boom 4 is configured to be expandable and contractible with a sliding member 4a capable of sliding in its longitudinal direction. Sliding of the sliding member 4a is driven by a controller (not shown). It is designed to be controlled remotely by the mechanism.

The boom 4 is adapted to hoist the mooring rope 5 with a hoisting member 7 provided at the tip of the sliding member 4a so as to be able to ascend and descend via a winch (not shown). The mooring rope 5 is hoisted through a pre-take rope 6 connected to the tip of the mooring rope 5.

A side thruster 3 for adjusting the distance to the ship 2 approaching from the rear is provided at the rear of the floating body 1.

In the offshore mooring equipment of the first embodiment described above,
When mooring a ship 2 approaching at a slow speed forward to the rear of the floating body 1 that receives waves 18, winds 19 and tidal current 20, the ship 2
Since the access of the mooring rope 5 to the ship is adjusted by the change in the tip position accompanying the turning 12 of the boom 4, the operation of passing the mooring rope 5 hoisted by the boom 4 to the ship 2 can be performed accurately. Even if waves 9 occur on the surface of the water, a small work boat (see reference numeral 16 in FIG. 5) such as a conventional boat is not required, so that the mooring work is not hindered.

Since the side thruster 3 is provided at the rear portion of the floating body 1, the jet flow 10 from the side thruster 3 is provided.
With a and 10b, it becomes possible to adjust the rear part of the floating body 1 to the left or right by turning positions 1a and 1b .
In combination with the turning action of the boom 4, the operation of delivering the mooring line 5 by the boom 4 can be performed more simply and appropriately.

In particular, in this embodiment, a suspending member 7 is provided at the tip of the sliding member 4a which is capable of expanding and contracting the boom 4, and through the suspending device 7, the pre-taken rope 6 at the end of the mooring rope 5 is provided. Is designed to be lifted, the sliding member 4a
The sliding action of the boom 4 allows the boom 4 to expand and contract smoothly,
The relative distance between the ship 2 approaching from the rear and the ship 2 is adjusted more appropriately, and the pre-emption rope 6 is first
Then, the mooring line 5 is also easily passed to the ship 2 via the pre-take rope 6.

Next, a second embodiment of the present invention will be described. As shown in FIG. 3, one point is a floating body 1 as a platform for offshore oil production, which is equipped with mooring equipment exactly as in the first embodiment. It is moored to the seabed by a mooring device 11.

In the second embodiment, a pair of left and right laser light type distance sensors 15, 15 for measuring the relative distance between the floating body 1 and the ship 2 approaching from the rear, in particular, are provided, and these distance sensors 15 are also provided. A thruster control system is provided for controlling the side thruster 3 in response to a detection signal from the thruster control system.

That is, the detection signal from the distance sensor 15 is input to the arithmetic unit 14, the thrust required to hold the position of the floating body 1 is obtained, and the control signal is sent to the drive controller 13 of the thruster 3. ing. The laser light type distance sensor 15 detects the distance by the reflected light from the reflecting device 17 of the ship 2, but a distance sensor of another type may be used.

In the second embodiment described above, the same operational effects as in the first embodiment described above are obtained, and further, the side thruster 3 for adjusting the distance between the rear portion of the floating body 1 and the boat 2.
Since the control is automatically performed, the initial operation of the mooring work can be performed efficiently and accurately.

FIG. 4 shows a modified example of the side thruster 3 in each of the above-described embodiments. In this case, two side thrusters 3a and 3b are arranged side by side at the rear of the floating body 1.

Thus, the side thrusters 3a, 3b are
Are juxtaposed to the rear part of the floating body 1, both side thrusters 3a and 3b are in a state where thrust is generated by jets 10a and 10b in opposite directions, and the rear part of the floating body 1 is adjusted by adjusting each thrust. It becomes possible to swiftly adjust the position by turning, responding to changes in tidal current, wind and waves.

In each of the above-described embodiments, the boom 4 is used as a component of the mooring apparatus, but the floating body 1 as a platform for oil production on the seabed and the vessel (tanker) 2 are used.
It is also possible as a modification of each embodiment of the present invention to provide the boom 4 with piping for feeding and loading petroleum on the ship 2 after the ship is moored. In this case, the boom 4 However, not only is it useful for the mooring work of the vessel 2 such as a tanker on the floating body 1, but it is also useful for the subsequent cargo handling of oil, so that the oil can be smoothly fed through the pipes along the boom 4. Become.

[0028]

As described in detail above, according to the offshore mooring equipment of the present invention, the following effects can be obtained. (1) In a floating body moored at the front on the sea, when mooring a ship to the rear of the floating body, access to the mooring line to the ship is due to the swingable boom that hoists the mooring line at the rear of the floating body. With the adjustment of the turning position and the adjustment of the turning position of the rear part of the floating body to the left or right by the side thruster, the operation of passing the mooring line suspended by the boom to the ship can be performed accurately, Since there is no need for support from a small work boat such as a conventional boat, there is no hindrance to mooring work even if waves occur on the water surface. (2) A suspending tool is provided at the tip of the sliding member that is configured to extend and contract the boom, and the pre-take rope at the tip of the mooring line is lifted through the suspending tool. By the sliding action of the sliding member, the boom can be smoothly expanded and contracted, and the access adjustment of the mooring line to the boat approaching from the rear can be performed more appropriately. Then, the mooring line can be easily passed to the above-mentioned ship through the same pre-take rope. (3) A distance sensor provided at the rear of the floating body measures the relative distance to a ship approaching from the rear, and a thruster control system is provided to control the side thruster at the rear of the floating body based on the detection signal. Then, the control of the side thruster for adjusting the distance between the rear part of the floating body and the ship is automatically performed, so that the initial operation of the mooring work can be efficiently and accurately performed. (4) The side thruster is located at the rear of the floating body, and the front and rear are 2
When the bases are installed side by side, both side thrusters are in a state where thrust is generated in opposite directions, and the position adjustment by turning the rear part of the floating body is performed by adjusting each thrust to change the tidal current, wind and waves. You will be able to respond promptly and quickly. (5) When the floating body is configured as a submarine oil production platform and the piping for feeding oil to the tanker moored by the mooring line is equipped along the boom, the boom is moored by the tanker. Not only will it help the work, but the oil supply from the seabed will be smoothly carried out from the above platform to the tanker by using the piping along the boom.

[Brief description of drawings]

FIG. 1 is a rear side view of a floating body equipped with offshore mooring equipment according to a first embodiment of the present invention.

2 is a plan view showing a state in which a ship is moored to a floating body equipped with the equipment of FIG. 1. FIG.

FIG. 3 is a plan view schematically showing a floating body equipped with offshore mooring equipment according to a second embodiment of the present invention.

FIG. 4 is an explanatory diagram showing a modification of the side thruster installation in each of the above-described embodiments.

FIG. 5 is an explanatory view showing a conventional mooring means for a ship on an offshore floating body.

FIG. 6 is a plan view showing a state in which a ship is moored to an offshore floating body.

[Explanation of symbols]

1 floating body 2 ships 3,3a, 3b Side thruster 4 boom 4a Sliding member 5 mooring lines 6 advance rope 7 suspenders 8 water surface 9 waves 10a, 10b jet 11 Single point mooring equipment 12 Boom swing 13 Drive controller 14 arithmetic unit 15 distance sensor 16 work boats 17 Reflector 18 Waves 19 wind 20 Tide

Continuation of front page (56) Reference JP-A-56-116586 (JP, A) JP-A-6-286694 (JP, A) JP-A-60-146787 (JP, A) JP-A-62-80196 (JP , A) Actually developed 57-184086 (JP, U) Actually developed 60-161696 (JP, U) Actually developed 1-83000 (JP, U) (58) Fields investigated (Int.Cl. ⁷ , DB) Name) B63B 21/00 B63B 27 / 10,27 / 24 B63H 25/42

Claims (5)

(57) [Claims] The rear of claim 1] were anchored to the seabed by a single point mooring front at sea floating, comprising a mooring device for mooring a ship approaching from the rear, the mooring device, rearward from the rear of the float Of the mooring line that can extend to the above-mentioned ship, and a swinging type with a hanger attached to the rear part of the floating body so that the mooring line can be lifted and the tip of the mooring line can be swung left and right behind the floating body. It is composed of a boom and turns to the left or right of the floating body at the rear of the floating body.
An offshore mooring facility, characterized in that a side thruster is provided for adjusting the relative distance between the floating body and the ship. 2. The boom is configured to be expandable and contractible with a sliding member capable of sliding in the longitudinal direction thereof, and for lifting the tip of the mooring line to the tip of the sliding member via a pre-take rope. Characterized by the provision of a hanging device,
The offshore mooring equipment according to claim 1. 3. A distance sensor for measuring the relative distance between the floating body and the ship is provided at the rear of the floating body, and
The offshore mooring equipment according to claim 1 or 2, further comprising a thruster control system for controlling the side thruster in response to a detection signal from the same distance sensor. 4. The offshore mooring equipment according to claim 1, wherein two side thrusters are provided side by side in front and rear. 5. The floating body is configured as an offshore oil production platform, and a pipe for feeding oil to a tanker moored by the mooring line is provided along the boom. The offshore mooring equipment according to any one of Items 1 to 4.