JPS624692A - Method for selecting connection of combination mooring line - Google Patents

Abstract

PURPOSE:To select connection of a line without using a special shape link, by providing a temporary retaining device consisting of a change link and a temporary chain load retainer, and connecting or disconnecting each kenter shackle at an end of a chain connected to a wire rope and an end of a chain line. CONSTITUTION:A temporary retaining device 12 consisting of change link 19 and a temporary chain load retainer 21 is connected through kenter shackles 14 and 16 to either end of a wire rope 11 wound by a winch 3 or a chain line 10 wound by a windlass 2. After supporting the load by the temporary chain load retainer 21, one of the kenter shackles 14 and 16 is opened to select a mooring line through the change link 19. Thus, it is not necessary to use a conventional open link or the like, and consider a direction of the open link in a winding operation of the winch and the windlass.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method for reconnecting combination mooring lines used for deep-sea mooring of offshore structures such as oil drilling rigs and ships.

[Conventional technology]

Figures 14 to 18 show an example of a conventional combination mooring line connection change method (Japanese Unexamined Patent Publication No. 52-14
0189), FIG. 14 is an overall front view, and FIGS. 15 to 17 are connection change explanatory views.

and FIG. 18 show a partial cross-sectional view of the eight-opening roll engaging the fairlead sheave.

The conventional combination mooring line reconnection method is a method in which a specially shaped link used to reconnect the wire rope and chain line is inserted into the mooring line and used as part of the line. As shown in Figure 14.

(b) The wire rope 40 is wound up and unwound on the drum 88, and the chain line 72° connected to the anchor (a) The leader chain (wire/cheno connector) 50 to 64 is... Connector 50. Shiibe/I/Structure 60. Chain 54.56.58.62
．． 64, and the wire rope 40.
The combination of leader chain and chain line 72 forms a combination mooring line.

(b) The 3-open roller link 8 is a specially shaped link that has eight openings and can connect mooring lines in eight directions.

) The lead chain 46 is a chain that is led from the chain locker to the workbench, passing over the windbus chain drum.

(4) The first and second attachment/detachment links 66, 80 are detachable links used for changing the connection of the wire/cheno line.

The three-opening roller chain 8 is connected to the lead chain 46 or leader chains 50 to 64 via the first or second attachment/detachment link 66.80 and is included in the line as a part of the mooring line. .

This three-open Rolin Kuro 8 has three connection openings and is used for changing wire/chain line connections. 8 openings using the link 66.68 for removing the number of attachments to the leader chenno 50-64. The lead chain 46 and the chain line 72 can be connected at the same time, and a T-shaped line is formed when changing the wire/cheno line connection. Because of this Y-shaped line, it is possible to slacken the removal side line and transfer tension to the use side line easily and safely by operating either the wind lane or the winch. Wire/chain fin connections can be easily changed using the 8-open Rollin Cro 8, but the 8-open Rollin Cro 8 must be inserted as part of the line into the chain line or combination mooring line after the connection has been changed. , must pass over Windranu's Chendrum and Fairlead Sheep.

Furthermore, the procedure for changing the wire/cheno connection using the 8-open Rolin Kuro 8 will be explained with reference to FIGS. 14 to 18.

(1) Figure 14 #) The three-open roller roller 8 is connected to the groove of the chain drum 44 so that it can pass vertically.

(2) From FIG. 15, the entire chain line 72 stored in the chain locker is moved out by the chain drum 44 of the windlass, leaving a part of the lead chain, and stopped at the connection change position.

(3) From Figure 16, the tips of leader chains 50 to 64 and 3
The opening for connecting the leader chino of the opening roller 8 is connected with the first attachment link 66. Now wire rope 4
A Y-shaped line of 0-lead chain 46-chain line 72 is formed.

(4) From Figure 17, the windlass 42 or winch 86
The tension acting on the reed chain 46 is completely transferred to the wire rope 40 by operating either one of the reed chains 46 and the reed chain 46 becomes slack.

For the second installation connecting the lead chain 46 and the 8-open roller chain 8, remove the link 80 and attach the lead chain 4.
Cut the connection between 6 and 3 open/Rorincro 8 and wire rope 4
A combination mooring line of 0-lead chino opening-3 open roller chain 8-chain line 72 is constructed.

(5) Operate the winch 36 and feed out the wire line to open the 8-open roller 8. The leader chain 50-64° wire rope 40 passes through the fairlead sheep 74 to form a combination mooring line.

(6) To change the connection from a combination mooring line to a chain line with a single chain, follow the above procedure in reverse.

(7) FIG. 18 shows the state in which the wire O-7" 40, the check 772, and the 8-open roller 8 pass through the fairlead sheep 74.

[Problem that the invention seeks to solve]

However, in the conventional method, (1)
Conventional wire/cheno connections are changed using a 3-way link, but with this method, the 3-way link remains part of the mooring line even after the connection is changed.

(2) This 3-open link has a protrusion that has an extra opening for the chain used for connection, and is used for common links, Kenter shacks, end links, etc. used in mooring lines. Because it is not the same shape as the standard link, it has a directionality that it will not pass through the chain drum and fairlead sheep unless it is on the vertical side and the opening is on the outside of the sheep, so lead the 8-open link so that it is on the vertical side. It is necessary to adjust the end of the chain to a horizontal chain.

(3) Wire/cheno combination damage When retrieving the mooring line, the wire rope is twisted 3 times.
The direction of the 3-way open link is not determined due to the effect on the open link, and adjustment work is required to make it vertical before entering the fairlead sheep.

(4) If the Fairlead Sheep is submerged in seawater, what should be done to check the direction and adjust the 3-way link?

Since it is carried out underwater, the work is difficult, requires long hours, and is dangerous.

There were drawbacks such as.

The present invention uses a special-shaped link (such as a 3-open link) as a tool for simply changing the wire/cheno connection, and provides a means for changing the connection without having to insert it into the mooring line. The purpose of the present invention is to smoothly pass through a chain drum and fairlead sheep without requiring direction adjustment or synchronization work, and to perform mooring work smoothly and safely.

[Means for solving problems]

However, the method for changing the connection of a combination mooring line according to the present invention is as follows.

(In a method for changing the connection of a combination mooring line used to change the connection between a wire line via a winch and a chain line via a windlass, the first connection change section is provided at the tip of the wire line. Insert the tip of the holder of the joining chain load primary holding device consisting of a change link and a change link into the holding part of the chain line,
The chain load is held in both lines, the chain is separated at a second connection change section several links above the holding section of the chain, and the second connection change section of the chain is connected to the change link. holding a chain load in the chain line, separating a first connection change part and a change link on the wire line, connecting the first connection change part to the upper end of the separated lower chain line, and connecting the first connection change part to the upper end of the separated lower chain line; The present invention is characterized by a series of steps in which the two lines are combined into a set by holding the cheno load at the cheno line and then removing the tip of the holder penetrating the holding portion of the cheno line. Furthermore, (2) a method for reconnecting a combination mooring line used for reconnecting a wire line via a winch and a chain line via a windlass, including a series consisting of an anchor, a chain line, a wire line, and a winch. winding the wire line through the winch in the combination mooring line;
A holder for a joining chain load primary holding device comprising a first connection change part and a change link provided at the tip of a lead chain forming a part of the Cheno line, in a holding part near the lower part of the connector between the wire line and the Cheno line. Penetrate the tip 1. Hold the cheno load on both lines above,
A second connection change part several links above the holding part is connected to the change link, the chain load is held by a wire line, the first connection change part and the change link are separated, and the -1st connection change is performed. connecting a part to the upper end of the separation lower cheno line, holding the cheno load with the cheno line, and further removing the tip of the holder penetrating the holding part to leave only the cheno line alone. It is characterized by

[Effect]

By removing the specially shaped link from the combination mooring line through the above procedure, no adjustment is required for the mooring line connection part to pass through the chain drum and fairlead sheep, creating a condition that is no different from the passage of a normal chain line.

〔Example〕

Figures 1 to 18 show an embodiment of the method of changing the connection of a combination mooring line according to the present invention.
FIG. 1 is an overall front view, FIGS. 2 to 11 are detailed explanatory views of the present invention, and FIG. 12 (-).

(b), (e) are detailed views of Moenholder and the first
Figures 8(a) and 8(b) show detailed views of the wire/cheno connector.

Figure 1, Figure 2, Figure 12 (a), (b), (C)
From FIGS. 8(a) and 8(b), one embodiment of the method for changing the connection of a combination mooring line according to the present invention is shown.

(7) Wire rope 11 that is wound up and 9 unwound by the drum 3 and the Chenoline 10° connected to the anchor at one end (A) Rope socket 108. Ball adapter 10
9B, 109b, special swivel 110. blood! N1
07, the rope socket 108 is connected to the wire rope 11 and is integrated with a wire/cheno connector 13° (b) connected to the end of the wire rope 11, a chino load holder (cheno hanger) 21, and 8
Change link 1 that can connect series mooring lines
The lead chain 7° (4) leads from the chain rocker 6 through the chain drum 2 of the line lath 1 to the workbench 8. ) Kenter shackle 14, which is part of the mooring line and has removable connection parts (A, B).
16.

Based on the above-mentioned purchase, the procedure for changing the connection of combination mooring lines for offshore structures, oil drilling rigs, etc. will be explained with reference to FIGS. 2 to 18.

(1) As shown in Fig. 2, all the chain lines 10 stored in the chain locker 6 are pulled out by the chain drum 2 of the windlass 1 and stopped at the connection change position.

(2) Figures 3 and 12 (a), (b), (e)!
Set the chain hanger 21 of the D joint layer chain load primary holding device 12 to the chain line holding part (c) a few inches below the first Kenter shaft #14. Now wire rope 11 - lead chain 7 - chain line 10 Y
Form glyph lines.

(3) From FIG. 4, operate either the line lath 1 or the winch 4 to completely transfer the tension acting on the lead chain 7 to the wire line 11 and slacken the lead chain 7.

(4) As shown in FIG. 5, the connection between the lead chain 7 and chain line 10 is cut off at the reconnection section (A) of the first Kenter shaft 14, which connects the lead chain 7 and chain line 10.

(5) As shown in FIG.
Connect at Kenter Shock/L'14 connection switching section.

(6) From FIG. 7, operate either the line lath 1 or the winch 4 to completely transfer the tension that has been transferred to the wire rope 11 to the lead chain 7 again, causing the wire row 111 to slacken.

(7) From Fig. 8, the wire rope 1 is removed at the connection change part (B) of the second Kenter shaft/I/16 that connects the wire rope 11 and the change link 19.
1 and the chain line 10 are disconnected via the joining chain load single-layer primary holding device 12.

(8) Wire rope 11 separated again from Figure 9
and the chain line 10 are connected at the connection change part CB of the second Kenter shaft 16 to form the lead chain 7 including the wire rope 11 and the joining chain load primary holding device 12.
- Forming a Y-shaped line of chain line lO.

(9) From Figure 10, windlass 1 or winch 4
completely transfer the tension acting on the lead chain 7 to the wire rope 11 by operating either one of the
- Sag the tothiene 7.

From Figure 11, the chain hanger 21 of the joining chain load primary holding device 12 is moved to the holding part (C) of the chain line 10.
Remove it.

As described above, the wire rope 11 and the chain line 10 are completely integrated, and a combination mooring line is completed.

The line configuration at this time is 11° wire rope and 18° wire/cheno connector. 2nd Kentershack/L/
16, chain line 10 and anchor.

(11) The welding chain load primary holding device 12 is held connected to the lead chain 7 until it is used for the next wire/f engine connection change operation.

Furthermore, the procedure for changing the connection from a combination mooring line to a chain-only mooring line involves winding up the wire line through the winch in a combination mooring line consisting of an anchor, a chain line, a wire line, and a winch. A connecting chain load primary holding device consisting of a first connection change section and a change link provided at the tip of the lead chain that forms part of the chain line is held in a holding section near the bottom of the connector between the line and the chain line. Penetrate the tip of the tool.

The chain load is held in both of the above lines, a second connection change part several links above the holding part is connected to the change link, the chain load is held in the wire line, and the second connection change part is connected to the first connection change part. The link is separated, and the first connection change part is connected to the upper end of the separated lower chain line, and the chain load is held by the chain line.

Furthermore, by removing the tip of the holder that has penetrated into the holder, only the chain line is left.

The chain load holder 21 of the joining chain load primary holding device 12 is shown in the form of a chain hanger as an example, and is not particularly limited as long as it can hold the chain load.

〔Effect of the invention〕

As described in detail, by providing a wire chain connection change method for a combination mooring line, it is possible to configure a line that does not include a specially shaped link (change link), which is a connection change tool, in the mooring line. The operation of the ring line becomes easy and safe.

[Brief explanation of drawings]

Figures 1 to 18 show a practical example of the method of changing the connection of a combination mooring line according to the present invention.
FIG. 1 is an overall front view of the present invention. 2 to 11 are detailed explanatory diagrams of the present invention. Figure 12 (body), (b), and (C) are detailed views of the chain holder, and a sectional view taken along the line ■b-■b in Figure 12 (-).
Figure 12 (b) ■C-■C cross-sectional view, Figure 13 (-)
, (b) respectively. A detailed plan view of the wire/cheno connector and a side view of the % No. Sakakima are shown. 14 to 18 show a conventional method for changing the connection of a combination mooring line. FIG. 14 is an overall front view, FIG. FIG. 6 shows a partial cross-sectional view of the rolling engaging the fairlead sheep. l...Wind" Rath, 2...Cendrum, 8.
... Drum, 4... Winch, 5... To, Last, 6
...cheno rocker, 7...lead chain, 8...
·Workbench. 9... Fairlead Sheep, 10... Chenoline. DESCRIPTION OF SYMBOLS 11...Wire rope, 12...Join chain load primary holding device, 18...Wire/cheno connector. 14... First Kenter shaft, 16... Second Kenter shaft, 18... Cheno, 19... Change link, 20... Cheno, 21... Chain load primary holder. 1st circle (g) 72111 13th circle

Claims (2)

[Claims] (1) In a method for reconnecting a combination mooring line used for reconnecting a wire line via a winch and a chain line via a windlass,
The tip of the holder of the joining chain load primary holding device, which consists of the first connection change section and change link provided at the tip of the wire line, penetrates into the holding section of the chain line, and the chain load is held on both lines. Then, the chain line is separated at a second connection change part several links above the holding part of the chain line, and the second connection change part of the chain is connected to the change link, and the chain line is connected to the second connection change part several links above the holding part of the chain line. Holding a chain load, separating a first connection change part and a change link on the wire line, connecting the first connection change part to the upper end of the separated lower chain line, and holding the chain load on the wire line. A method for changing the connection of a combination mooring line, further comprising a series of steps of combining the two lines into a set by removing the tip of the holder penetrating the holding part of the chain line. (2) In a method for reconnecting a combination mooring line used for reconnecting a wire line via a winch and a chain line via a windlass,
In a series of combination mooring lines consisting of an anchor, a chain line, a wire line, and a winch, the wire line is wound up through the winch, and a portion of the chain line is attached to a holding part near the lower part of the connector between the wire line and the chain line. The tip of the holder of the joining chain load primary holding device consisting of the first connection change part and the change link provided at the tip of the lead chain forming the lead chain is penetrated, and the chain load is held in both lines, and the holding part A second connection change part several links above is connected to the change link, and the chain load is held by a wire line,
Separate the first connection change section and change link, and
A series of steps in which a connection change part is connected to the upper end of the separated lower chain line, the chain load is held by the chain line, and the tip of the holder penetrating into the holding part is removed to leave only the chain line. A method for changing the connection of a combination mooring line, which is characterized by: