DETACHABLE MOORING SYSTEM FOR OFFSHORE STRUCTURE

Abstract

Proposed is a detachable mooring system for an offshore structure, including a first tension adjuster connected to an offshore structure, and blocking a pulling chain from proceeding from an outlet of a body toward an inlet, a second tension adjuster connected to one end of the pulling chain and blocking the pulling chain from proceeding from an outlet of a body toward an inlet, a mooring chain having a first longitudinal end connected to one surface of the second tension adjuster body and having a second longitudinal end connected to an anchor on the seabed, a first lead rope having one longitudinal end connected to one end of the pulling chain discharged out through the first tension adjuster outlet, and a second lead rope having one longitudinal end connected to the second tension adjuster body.

Claims

1. A detachable mooring system for an offshore structure, the detachable mooring system comprising: a first tension adjuster connected to an offshore structure to be a moored object, and configured to block advance of a pulling chain, which is inserted through an inlet of a body and is discharged out through an outlet thereof, in a direction from the outlet toward the inlet; a second tension adjuster connected to one end of the pulling chain connected to an outer portion of the inlet of the first tension adjuster, and configured to block advance of the pulling chain, which is inserted through an inlet of a body and is discharged out through an outlet, in a direction from the outlet toward the inlet; a mooring chain having a first longitudinal end connected to one surface of the body of the second tension adjuster, and having a second longitudinal end connected to an anchor settled on a seabed; a first lead rope having one longitudinal end, which is connected to one end of the pulling chain discharged out through the outlet of the first tension adjuster; and a second lead rope having one longitudinal end connected to the body of the second tension adjuster.

2. The detachable mooring system of claim 1, wherein each of the first tension adjuster and the second tension adjuster comprises: a pulley rotatably arranged at the body and brought into contact with the pulling chain; and a restrictor connected to the pulley, and configured to restrict uni-directional rotation of the pulley while being locked.

3. The detachable mooring system of claim 2, wherein each of the first tension adjuster and the second tension adjuster further comprises a pulling member removing a locked state by pulling the restrictor.

4. The detachable mooring system of claim 2, wherein each of the first tension adjuster and the second tension adjuster further comprises a wireless controller configured to lock and unlock the restrictor in response to a control signal from a remote location.

5. The detachable mooring system of claim 1, wherein the second tension adjuster comprises a link member arranged at any one surface of the body to provide a binding portion of the second lead rope.

6. The detachable mooring system of claim 1, wherein the second tension adjuster comprises a binding member arranged at any one surface of the body and configured to bind the mooring chain.

7. The detachable mooring system of claim 1, further comprising: a connecting rope connected to one end of the pulling chain discharged out through the outlet of the second tension adjuster.

Description

DESCRIPTION OF DRAWINGS

[0017] FIG. 1 is a view of an example showing a form of a detachable mooring system for an offshore structure according to the present disclosure, the detachable mooring system being applied to an offshore structure.

[0018] FIG. 2 is a view of an example showing towing of an offshore structure by using a first tension adjuster and a first lead rope of the detachable mooring system for an offshore structure according to the present disclosure.

[0019] FIG. 3 is a view of an example showing mooring chain towing by using a second lead rope of the detachable mooring system for an offshore structure according to the present disclosure.

[0020] FIG. 4 is a view of an example showing connection between the first tension adjuster and a second tension adjuster of the detachable mooring system for an offshore structure according to the present disclosure.

[0021] FIG. 5 is a front view showing a structure of the first tension adjuster of the detachable mooring system for an offshore structure according to the present disclosure.

[0022] FIG. 6 is a front view showing a structure of the second tension adjuster of the detachable mooring system for an offshore structure according to the present disclosure.

[0023] FIG. 7 is a view of an example showing tension adjustment by the first tension adjuster of the detachable mooring system for an offshore structure according to the present disclosure.

[0024] FIG. 8 is a view of an example showing tension adjustment by the second tension adjuster of the detachable mooring system for an offshore structure according to the present disclosure.

DETAILED DESCRIPTION

[0025] Hereinbelow, the present disclosure will be described in detail with reference to accompanying drawings.

[0026] As shown in FIG. 1, a detachable mooring system A for an offshore structure according to the present disclosure includes: a first tension adjuster 10; a second tension adjuster 20; a mooring chain 30; a first lead rope 40; and a second lead rope 50.

[0027] The first tension adjuster 10 of the present disclosure is connected to an offshore structure 100 to be a moored object, and blocks advance of a pulling chain 200, which is inserted through an inlet 11a of a body 11 and is discharged out through an outlet 11b, in a direction from the outlet 11b toward the inlet 11a.

[0028] At this point, as shown in FIG. 5, the first tension adjuster 10 includes: a pulley 12 rotatably arranged at the body 11 and brought into contact with the pulling chain 200; and a restrictor 13 connected to the pulley 12 and configured to restrict uni-directional rotation of the pulley 12 with being locked. Accordingly, as uni-directional rotation of the pulley 12 is restricted by locking of the restrictor 13, the advance from the outlet 11b of the pulling chain 200 toward the inlet 11a may be blocked.

[0029] At this point, the restrictor 13 may use any known structures and methods as long as it can restrict uni-directional rotation of the pulley 12 as locking of the restrictor 13 is performed, and detailed description of the restrictor 13 will be omitted.

[0030] In addition, the first tension adjuster 10 includes a pulling member 14, the pulling member 14 being configured to remove the locked state by pulling the restrictor 13. Accordingly, when the pulling member 14 is pulled manually, the locked state of the restrictor 13 is removed and the pulling chain 200 can be moved forward from the outlet 11b toward the inlet 11a.

[0031] In addition, the first tension adjuster 10 includes a wireless controller 15 configured to lock and unlock the restrictor 13 in response to a control signal from a remote location. Accordingly, the locked state of the restrictor 13 is removed according to control of the wireless controller 15, and the pulling chain can be moved forward from the outlet 11b toward the inlet 11a.

[0032] At this point, the wireless controller 15 may use any known structures and methods as long as it can lock and unlock the restrictor 13 according to a control signal of a remote location, and detailed description of the wireless controller 15 will be omitted.

[0033] Meanwhile, the first tension adjuster 10 is connected to the offshore structure 100 from the start while being coupled with the pulling chain 200 and, specifically is connected to any one bollard (without reference numeral) constituting the offshore structure 100. Accordingly, as shown in FIG. 2, when the pulling chain 200 and the first lead rope 40 connected thereto are pulled using a winch equipped in a ship 300, towing the first tension adjuster 10 is achieved and additionally towing of the offshore structure may be achieved.

[0034] The second tension adjuster 20 of the present disclosure is connected to one end of the pulling chain 200 connected to an outer portion of the inlet 11a of the first tension adjuster 10. The second tension adjuster 20 blocks the advance of the pulling chain 200, which is inserted through the inlet 11a of a body 21 and is discharged out through an outlet 21b, in a direction from the outlet 21b toward the inlet 21a.

[0035] At this point, as shown in FIG. 6, the second tension adjuster 20 includes: a pulley 22 rotatably arranged at the body 21 and brought into contact with the pulling chain 200; and a restrictor 23 connected to the pulley 22 and configured to restrict uni-directional rotation of the pulley 22 with being locked. Accordingly, as uni-directional rotation of the pulley 22 is restricted by locking of the restrictor 23, the advance from the outlet 21b of the pulling chain 200 toward the inlet 21a may be blocked.

[0036] At this point, the restrictor 23 may use any known structures and methods as long as it can restrict uni-directional rotation of the pulley 22 as locking of the restrictor 23 is performed, and detailed description of the restrictor 23 will be omitted.

[0037] In addition, the second tension adjuster 20 includes a pulling member 24, which is configured to remove the locked state by pulling the restrictor 23. Accordingly, when the pulling member 24 is pulled manually, the locked state of the restrictor 23 is removed and the pulling chain 200 can be moved forward from the outlet 21b toward the inlet 21a.

[0038] In addition, the second tension adjuster 20 includes a wireless controller 25 configured to lock and unlock the restrictor 23 in response to a control signal from a remote location. Accordingly, the locked state of the restrictor 23 is removed according to control of the wireless controller 25, and the pulling chain 200 can be moved forward from the outlet 21b toward the inlet 21a.

[0039] At this point, the wireless controller 25 may use any known structures and methods as long as it can lock and unlock the restrictor 23 according to a control signal of a remote location, and detailed description of the wireless controller 25 will be omitted.

[0040] In addition, the second tension adjuster 20 includes a link member 26 arranged at one surface of the body 21. Accordingly, as the second lead rope 50 is bound to the link member 26, connection of the second lead rope 50 to the second tension adjuster 20 may be achieved.

[0041] In addition, the second tension adjuster 20 includes a binding member 27 arranged at one surface of the body 21. Accordingly, the mooring chain 30 extending from an anchor 31 is bound to the binding member 27, and accordingly the mooring chain 30 may be connected to the second tension adjuster 20.

[0042] A first longitudinal end of the mooring chain 30 of the present disclosure is connected to one surface of the body 21 of the second tension adjuster 20 and a second longitudinal end thereof is connected to the anchor 31 is settled on the sea bed.

[0043] At this point, the mooring chain 30 may be connected to the second tension adjuster 20 as the first longitudinal end thereof is bound to the binding member 27 provided at the second tension adjuster 20.

[0044] Meanwhile, the mooring chain 30 is connected to the second tension adjuster 20 at first. Accordingly, as shown in FIG. 3, the second lead rope 50 connected to the second tension adjuster 20 is pulled using the winch (without reference numeral) arranged at the ship 300, and accordingly towing of the second tension adjuster 20 is achieved and also towing the mooring chain 30 may be achieved.

[0045] A first longitudinal end of the first lead rope of the present disclosure is connected to one end of the pulling chain 200 discharged out through the outlet 11b of the first tension adjuster 10.

[0046] Therefore, towing the offshore structure 100 or tension adjustment of the pulling chain 200 may be achieved as a second longitudinal end of the first lead rope 40 is pulled using the winch arranged at the ship 300.

[0047] Meanwhile, the offshore structure 100 may be restrained from unintentionally moving while being exposed outwards as the second longitudinal end of the first lead rope 40 is bound to the offshore structure 100 in situations other than towing or tension adjustment.

[0048] A first longitudinal end of the second lead rope 50 of the present disclosure is connected to the body 21 of the second tension adjuster 20.

[0049] Accordingly, the second tension adjuster 20 and the mooring chain 30 connected to the second tension adjuster may be towed as a second longitudinal end of the second lead rope 50 is pulled using the winch arranged at the ship 300.

[0050] At this point, the second lead rope 50 may be connected to the second tension adjuster 20 as the first longitudinal end of the second lead rope 50 is bound to the link member 26 arranged at one surface of the body 21 of the second tension adjuster 20.

[0051] Meanwhile, the offshore structure 100 may be restrained from unintentionally moving while being exposed outwards as the second longitudinal end of the second lead rope 50 is bound to the offshore structure 100 in situations other than towing or tension adjustment.

[0052] Furthermore, additionally, the detachable mooring system A for an offshore structure of the present disclosure may include a connecting rope 60.

[0053] At this point, a first longitudinal end of the connecting rope 60 is connected to one end of the pulling chain 200 discharged out through the outlet 21b of the second tension adjuster 20. Accordingly, a tension of the pulling chain 200 may be adjusted as a second longitudinal end of the connecting rope 60 is pulled using the winch arranged at the ship 300.

[0054] Hereinbelow, mooring the offshore structure 100 by using the detachable mooring system A for an offshore structure of the present disclosure will be described in detail.

[0055] First, the offshore structure 100 and the mooring chain 30 are transferred to one point on the sea.

[0056] At this point, the first tension adjuster 10 is connected to the offshore structure 100, the pulling chain 200 is connected to the first tension adjuster 10, and the first lead rope 40 is connected to the first longitudinal end of the pulling chain 200 discharged out through the outlet 11b of the body 11 of the first tension adjuster 10.

[0057] The second tension adjuster 20 is connected to the first longitudinal end of the mooring chain 30, and the second lead rope 50 is connected to the body 21 of the second tension adjuster 20.

[0058] Meanwhile, the mooring chain 30 transferred to one point on the sea is located on the sea by being inserted into the sea with one end thereof connected to a buoy (without reference numeral).

[0059] At this point, the buoy is seated from the mooring chain 30 in a process in which the first tension adjuster 10 and the second tension adjuster 20 are connected to each other, so that the mooring chain 30 may be located underwater.

[0060] Next, the first tension adjuster 10 and the second tension adjuster 20 are connected to each other.

[0061] At this point, as shown in FIG. 4, the second tension adjuster 20 is connected to one longitudinal end of the pulling chain 200 extending from the first tension adjuster 10. Accordingly, the pulling chain 200 may allow connection between the first tension adjuster 10 and the second tension adjuster 20 to be achieved.

[0062] At this point, the pulling chain 200 extending from the first tension adjuster 10 may be connected to the second tension adjuster 20 as the longitudinal end thereof is inserted through the inlet 21a of the body 21 of the second tension adjuster 20 and is discharged out through the outlet 21b.

[0063] Meanwhile, connection between the first tension adjuster 10 and the second tension adjuster 20 is performed while the second tension adjuster 20 is towed on a ship thereby minimizing underwater operation.

[0064] Next, tension adjustment is performed while the second tension adjuster 20 and the mooring chain 30 are inserted into the water.

[0065] In the present disclosure, one longitudinal end of the pulling chain 200 is discharged out through the outlet 11b of the body 11 of the first tension adjuster 10, and the longitudinal end of the pulling chain 200 is connected to the first lead rope 40. As shown in FIG. 7, the first lead rope 40 is pulled using the winch arranged at the ship 300, and accordingly the offshore structure 100 and the anchor 31 are tightened therebetween, i.e., the pulling chain 200 and the mooring chain 30 are tightened, thereby achieving tension adjustment.

[0066] Furthermore, in the present disclosure, another longitudinal end of the pulling chain 200 is discharged out through the outlet 21b of the body 21 of the second tension adjuster 20, and the connecting rope 60 is connected to the longitudinal end of the pulling chain 200. As shown in FIG. 8, the connecting rope 60 is pulled using the winch arranged at the ship 300, and accordingly the offshore structure 100 and the anchor 31 are tightened therebetween, i.e., the pulling chain 200 and the mooring chain 30 are tightened, thereby achieving tension adjustment.

[0067] However, each of the first tension adjuster 10 and the second tension adjuster 20 blocks the uni-directional advance of the pulling chain 200 by restricting uni-directional rotation of the pulley 12, 22 by the restrictor 13, 23. Tension adjustment may be difficult by blocking the uni-directional advance of the pulling chain 200.

[0068] However, in the present disclosure, each of the first tension adjuster 10 and the second tension adjuster 20 includes a pulling member 14, 24. When the pulling member 14, 24 is pulled manually, locking of the restrictor 13, 23 may be removed. Accordingly, the uni-directional advance of the pulling chain 200 is released, in other words, bi-directional advance thereof may be achieved, so that tension adjustment by pulling the pulling chain 200 may be efficiently achieved.

[0069] Furthermore, in the present disclosure, each of the first tension adjuster 10 and the second tension adjuster includes a wireless controller 15, 25. Locking of the restrictor 13, 23 may be removed by control of the wireless controller 15, 25 in response to a control signal from a remote location. Accordingly, the uni-directional advance of the pulling chain 200 is released, in other words, the bi-directional advance thereof may be achieved, so that tension adjustment by pulling the pulling chain 200 may be efficiently achieved.

[0070] Meanwhile, the detachable mooring system A for an offshore structure according to the present disclosure may efficiently relocate the moored offshore structure 100 in emergency situations such as port movement requirements for emergency maintenance or typhoons.

[0071] In other words, while the offshore structure 100 is moored, one end of each of the first lead rope 40 and the second lead rope 50 of the present disclosure is bound to the offshore structure 100 to be exposed outwards. In emergency situations such as port movement requirements for emergency maintenance or typhoons, the end of the first lead rope 40 and the second lead rope 50 bound to the offshore structure 100 is unbound and connected to the winch arranged at the ship 300 and then is pulled, thereby allowing not only the offshore structure 100 to be towed but also the second tension adjuster 20 to be towed. Accordingly, connection between the first tension adjuster 10 and the second tension adjuster 20 may be simply removed as the second tension adjuster 20 is towed to the ship and the pulling chain 200 is separated therefrom.

[0072] Therefore, while connection between the first tension adjuster 10 and the second tension adjuster 20 is removed, the pulling chain 200 and the first lead rope 40 that extend from the first tension adjuster 10 is connected to the ship 300 to move the ship 300. Accordingly, the offshore structure 100 connected to the first tension adjuster 10 is transferred, thereby quickly and safely performing relocation.

[0073] At this point, the second tension adjuster 20 released from connection with the first tension adjuster 10 may maintain a previous installation location as the second tension adjuster 20 connected to the buoy is re-put into the water. Therefore, when mooring of the offshore structure 100 is required in the future, the second tension adjuster located in the water is towed and is connected to the first tension adjuster 10, and accordingly the offshore structure 100 may be re-located at the point before relocation.

[0074] The present disclosure described above is not limited to the above-mentioned embodiment and those skilled in the art will appreciate that various modifications, additions and substitutions are possible, without departing from the scope and spirit of the present disclosure as disclosed in the accompanying claims, and the modifications, additions and substitutions are within the scope of the protection of the patent right of the present disclosure that are defined by description of the claims.

TABLE-US-00001 [Description of Reference numerals] 10: first tension adjuster 11: body 11a: inlet 11b: outlet 12: pulley 13: restrictor 14: pulling member 15: wireless controller 20: second tension adjuster 21: body 21a: inlet 21b: outlet 22: pulley 23: restrictor 24: pulling member 25: wireless controller 26: link member 27: binding member 30: mooring chain 31: anchor 40: first lead rope 50: second lead rope 60: connecting rope 100: offshore structure 200: pulling chain 300: ship A: mooring system

INDUSTRIAL APPLICABILITY

[0075] The present disclosure is configured not only to facilitate mooring of an offshore structure but also to quickly and safely relocate a moored offshore structure in emergency situations such as port movement requirements for emergency maintenance or typhoons, so that the present disclosure has industrial applicability in relation to manufacturing of a mooring system for an offshore structure.