JPS59202089A - Apparatus for developing, lifting and receiving ocean physical probing apparatus - Google Patents

Abstract

PURPOSE:To facilitate the development, lifting and reception of an apparatus and to make it possible to lower an accommodation height on a ship, by hanging a rope for connecting a buoy and the gun supported by the buoy in a twofold state. CONSTITUTION:A gun 3 is attached to one end of the rope 34 connected to buoys 9 floated on the surface of the sea to emit a sonic wave. An intermediate beam 35 is provided to the intermediate position of the rope 34 which is, in turn, hung in a twofold state while said beam is suspended from the trolley 18 of a rail 31. The attracting part of a magnet 33 is adhered to the beam 35 to successively move the gun 3 above a well 30 and, subsequently, the beam 35 is separated from the trolley 18 to be immersed in the sea. Therefore, the developing lifting and receiving work of a probing apparatus becomes safe and easy, a large number of workers are not necessary and, because the connecting rope 34 is hung in a twofold state through the intermediate beam 35, an accommodation height on a ship can be lowered.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device for deploying and retrieving a gun, which is the epicenter of a marine geophysical exploration vessel.

Until a few years ago, airguns and other instruments used for synchronized firing were arranged at relatively small intervals to form airgun groups, and airguns and other instruments were used to lower the epicenter into the sea and retrieve it on board ships in ocean geophysical exploration. It would have been sufficient to suspend the array beam from two rods or frames, one on each port and starboard side, and lower or retrieve the entire array beam together with the suspended buoy using a davisod.

However, in recent years, in order to improve the performance of the synthetic sound waves generated by the seismic source group, for example, six air guns suspended at an average interval of about 3 m are connected to a single string (compressed air pipe and Launch signal wire 3 Launch monitor wire 1 Strength steel cables arranged in parallel or integrated into one), for example, two strings with an interval of 10 m are used to form a circumferential array of the same wire. The array can be towed behind the ship in three columns, e.g. 50m apart, three aft, e.g. 20m apart, or a combination of the above, nine columns and rows. Became.

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1, which explains the outline of a conventional marine geophysical exploration epicenter deployment and recovery device with reference to the drawings, is an explanatory diagram of an exploration situation of a marine geophysical exploration vessel.

A geophysical exploration device S is towed at the stern of the geophysical exploration vessel 1, and this geophysical exploration device S has streamer cables 2 and air guns 3 constituting a plurality of arrays 4 arranged linearly by strings 5. There is.

The streamer cable 2 is a hydrophone that captures the sound waves emitted from each layer of the underground structure.
804 pieces arranged vertically, 300 pieces including front and rear attached sections
It is towed over a length of 0 to 3600 m.

The array 4 is comprised of six air guns 3 in this figure. 6 is a hydrofoil type parahen for towing the air gun 3 in a horizontally expanded state.

FIG. 2 is a schematic diagram showing an example of another exploration device, in which one streamer cable 2 is towed to the stern of the geophysical exploration vessel 1, one on each side of the streamer cable 2, and two at further apart positions. book s1
The figure shows the Hering 5 expanded and towed. In this example, the array 4, which is a collection of air guns 3, is one set for one string 1 to 5, but as shown in FIG. They can also be arranged at intervals in the direction.

FIG. 3 is a side view showing the arrangement of the geophysical exploration device S shown in FIG. Builopshire.

The air gun 3 is supported in the sea via the cruiser 11.

The air guns 3 are linearly connected by strings 5, and a parahen 6 is connected to the string 5 ahead of the first air gun 3, and this parahen 6 is also supported in the sea by a buoy 9.

As mentioned above, it is composed of a Hydomico Bon, etc., which emits sound waves into the sea from the air gun 3, reflects the sound waves from various layers of the earth, and receives the reflected sound waves built into the streamer cable 2 (Fig. 1). The problem is how to deploy a series of geophysical exploration devices S from the lifted and recovered state on the geophysical exploration vessel 1 to the deployed state in the ocean, and how to recover and recover the series of geophysical exploration devices S from the underwater deployed state to the stored state on the ship. be.

For example, when you discover a malfunctioning air gun, you need to immediately retrieve the string that the air gun is attached to and replace it with a spare air gun.There are many opportunities to deploy and retrieve the string supporting the air gun. In this case, the following problem occurs.

The first problem is that the JIG on the geophysical exploration vessel 1 shown in Figure 4
When deploying the string 5 into the sea from the above-mentioned stored state,
Or, conversely, when lifting and retrieving, strings 5 and air guns 3 are attached to the rampway 13 formed at the stern of the geophysical exploration vessel 1.
However, there is a disadvantage that the air gun 3 may be damaged by this dragging.

The second problem is that when lifting and retrieving the geophysical exploration device S on the geophysical exploration vessel 1 or when deploying it underwater, heavy objects are operated on the inclined rampway 13, which poses a risk to human life. It is a certain thing.

The third problem is that when the physical exploration device S is recovered on the physical exploration vessel 1 or when it is deployed underwater, it requires a lot of time and manpower.

Specifically, a conventional operation of moving the physical exploration device S from a state of lifting and retrieving on a ship to a state of deployment into the sea will be described.

FIG. 4 is an explanatory diagram showing the lifting and retrieval state of the geophysical exploration device S on the geophysical exploration vessel 1''2.
5.16 (These rails 15 and 16 are usually supported in parallel, but for convenience of drawing, they are shown arranged in the same position), and the rail 15 is supported by a buoy 9. However, the air gun 3 and the parahen 6 are each supported on the rail 16, and the string 5 connecting these is configured to be wound around the sling winch 1 to the ring winch 17.

FIG. 5 is a diagram showing the suspended state of the buoy 9.
A buoy rope 1o is connected to the buoy rope 10, and the middle point of this buoy rope 10 is bent to form a trolley 18 that moves on the rail 15.
It is suspended from a shackle 19 installed at the Furthermore, a shackle 20 for connecting a beam 21 supporting the air gun 3 is provided at the end of the buoy rope 10.

FIG. 6 is a diagram showing the state in which the air gun 3 and the like are supported. The beam 21 is suspended.

Further, a string 5 is supported in a meandering manner through a cylindrical body 25 in the middle of a rope 24 connecting the beam 21 and the air gun 3.

When deploying the geophysical exploration device S stored on the geophysical exploration vessel 1 into the sea as shown in Figures 4 to 6, the air gun 3 located at the rear end is (In Fig. 7, the buoy 9 located at the forefront is connected to the air gun 3 for convenience of drawing)
. Specifically, the buoy rope 10 is removed from the shackle 19 in FIG. 5 and connected to the shank 23 in FIG. 6, without separating the shackle 23 from the rope 22.

FIG. 8 shows this state, where a buoy 9. air gun 3
．． The beam 21 is in a lying position.

Figure 9 shows a state in which one more air gun 3 has been lowered by the same operation as above, and two air guns 3 and a buoy 9 for them have been placed on the rampway 13. Buoy 9 is about to reach sea level 8.

Further, FIG. 10 shows a state in which still another air gun 3 is lowered to the sea surface 8.

Figure 11 shows that the string winch 17 is operated to loosen the string 5, and then the geophysical exploration device S is deployed underwater while the buoy 9 is connected to the air gun 3 one after another, and connected to the end of the string 5. This figure shows Parachen 6 being laid in the sea.

Once the geophysical exploration device S is installed in the sea in the state shown in FIG. 11, the string winch 17 is further loosened to sink the parahen 6 into the sea to a predetermined water depth. When the remaining string 5 is loosened, the part of the string 5 beyond the paraben 6 becomes parallel to the center line at a prescribed offset distance.

Air cans 3, Parahen 6, etc. are heavy objects, and they require attachment and detachment of hooks, grounding on the upper α111 part of rampway 13, and lifting from the upper end of rampway 13, which is beyond human power and requires a hoist IQ for it. It was necessary to install a large number of them near the top of the rampway.

In order to facilitate understanding of the present invention, the number of work elements when installing the physical exploration device S will be explained in terms of work in the case of deployment for one air gun as follows.

Number of elements (1) Movement of buoy 2 (2)
Removing the buoy hook from the air gun retaining ring...2; j (3) Disconnecting the buoy hanging trolley...2 (4)
)Temporary holding by air gun hoist...1(5)
Disconnecting the hanging trolley of the air gun...2 (6) Grounding the air gun using the hoist...1 (7) Disconnecting the air gun from voice 1...1 (8) Disconnecting the string holding sheave... 2 (9) String winch operation...100) Move 6 trolleys to a place where they do not interfere with the next work...
...6 As mentioned above, when deploying one air gun, a total of 20 operations are required, and when the number of air guns is, for example, 36 and 6 pieces, 20 x 42 = 840 operations have to be performed. It is not possible to deploy exploration equipment underwater or retrieve it on board a ship.

The main drawbacks of the deployment and retrieval work of the conventional geophysical exploration device are as follows.

(1) It requires a lot of time for deployment and recovery.

(Requires a worker with 2+, C loss.

(3) Dangerous work, especially θI゛1 on the rampway during lift-off
Hooking the hoist hook near 4 is work, and disconnecting the hoist hook on the rampway in the early stages of deployment poses a risk of workers falling from the rampway into the sea if they slip.

(4) Ft5 damage may be caused to the air gun, which has a delicate mechanism for dragging the air can along the rampway.

In particular, the solenoid valve that controls the firing of an air gun is easily damaged.

(5) Since the rails installed on the underside of the handle are located high, it is necessary to install a high workbench or a large-area work platform.

The present invention aims to eliminate the various drawbacks associated with the deployment and retrieval of the conventional geophysical exploration equipment.

More specifically, it is not necessary to attach the buoy to the string of the air gun each time the geophysical exploration device is deployed and retrieved, and the storage height on the ship can be reduced to the distance where the air gun is directly suspended from the buoy. The present invention provides a device for deploying and retrieving geophysical exploration equipment that can significantly reduce the towing water depth.

The structure of the present invention to achieve the above object is to provide an intermediate beam in the middle of a rope that connects a buoy and an air gun or other earthquake source, and by hanging this intermediate beam, the rope is folded in half and the rope is folded in half. It is a device configured to hang a buoy on one side and an air gun on the other.

Next, the present invention will be described in detail with reference to the drawings.

For convenience of explanation, a case will be described in which the space on the ship has been rearranged so that air guns in an array configuration along the slings can be stored on the ship, and the distribution of the space on the ship has been considered.

FIG. 12 is a diagram showing the state in which the geophysical exploration device S has been lifted and retrieved on the geophysical exploration vessel 1. A rampway 13 is provided at the stern of the geophysical exploration vessel 1, and a well 30 is installed at the end of the rampway 13. is installed with an opening above the sea level, and port 9 handles 1.
A rail 31 is provided at the bottom of the well 4, and the rear end 31a of this rail 31 extends above the well 30. A rail 32 for a magnetic lift 33 is provided in parallel above the rear end portion 30a. Further, the rear end portion 31a of the rail 31 and this rail 32 are inclined toward the well side 30.

The geophysical exploration device S is located at buoy 9 as shown in Figure 13-A and B.
An intermediate beam 35 is provided at an intermediate position of the rope 34 connecting the air gun 3 and the air gun 3, and the intermediate beam 35 is suspended by a shackle 19 of a trolley 18 running along the rail 31''.

Figure 13-B shows the expanded state of the geophysical exploration device S, with 9 buoys at the top position and an intermediate beam 35 at the middle position of the board.
However, the air gun 3 is also located at the lowest position, and these are connected by a rope 34 (rope or chain).

Therefore, by supporting the intermediate beam 35 with a shackle provided on the trolley 18, the rope 34 can be moved with the intermediate beam 35 on top and the buoy 9 and air gun 3 on the bottom, as shown in FIG. 13-A. It will be folded in half and hung.

As shown in FIG. 12, the rope connecting the paraben 6 and the buoy 9 is supported by a shackle 37 provided on the trolley 36 at the middle part.

These intermediate beams 35 and parahens 6 are connected to the string 5
connected by.

FIG. 14 shows the intermediate beam 35 on which the first gun 3 is suspended.
The drawing shows the state in which the adsorption part of the magnetic lift 33 is attached to. This magnetic lift 33 is configured to be movable along the rail 32 using a rank and pinion system, and the moving device of this magnetic lift 33 is driven to move it to the rear end of the rail 32 to move the first air gun 3. Place it on the well 30. This state is shown in FIG. 15, and as a result of the above operation, the first air gun 3 is moved onto the well 30, and the second air gun 3 is moved onto the well 30. 3rd air gun 3
is pulled by the first air gun 3 and moves onto the well 30.

Next, as shown in FIG.
The trolley 40 is moved to a position directly above the air gun 3, and the intermediate beam 35 that is attracted to the suction part 38 is pulled up.
Remove the hook provided at the top and hang the rope 39. After this operation, the rear end 31 of the rail 31
The 1-lorry 40 supported by the rail 31 rolls to the stern end according to the inclination of the rail 31. In this state, a part of the first physical exploration device S is immersed in the sea, and the second physical exploration device S is about to land on the water.

FIG. 17 shows a state in which the second geophysical exploration device S is lowered in the same manner as described above. is wound up, the hook is removed, this row 139 is extended, and the second physical exploration device S is lowered.

The trolley 40 supporting the second intermediate beam 35 and the like moves along the rail 32 of the well 30 to the stern.

The same operations are performed in the following order to install the physical exploration device S in the sea.

FIG. 18 shows the fifth intermediate beam 35 separated by the suction part 38 of the Magneno I lift 33 and lowered.
After this, the string winch 17 is further loosened to unwind the string 5 wound on the string winch 17, and the last intermediate beam 35 is removed. FIG. 19 shows the state in which the last intermediate beam 35 is lowered. The physical exploration devices S will be deployed (laid) into the sea one after another.

Figure 20 shows the string 5 loosened until the parahen 6 installed closest to the geophysical exploration vessel 1 is above the well 30, and then the hook supported by the trolley 40 is removed in Figure 21 and the magnet A state in which the rope 39 of the lift 33 is extended and the parachen 6 is landed on the water is shown.

Thereafter, as shown in FIG. 22, the string 5 equipped with air guns 3 on both sides of the streamer cable 2 is removed by operating the string winch 17 to release the sling 5 and towing the series of geophysical exploration devices S. It will be towed at predetermined intervals.

As described above, the present invention provides an intermediate beam 35 in the middle of the rope 34 that connects the air gun 3 and the buoy 9 that supports it (FIG. 13-A, B), and the air gun is installed with the intermediate beam 35 on top. 12 with the buoy 9 hanging down.
13-8), this intermediate beam 35 is characterized in that it is configured to be suspended by a magnetic lift 33 supported by a rail 32 provided at the lower part of the boat deck 14.

After the first air can 3 is grabbed by the intermediate beam 35 using the magnetic lift 33 and the entire string 5 is first moved rearward, the work elements required to lower each individual gun are as follows.

(1) Operate the magnetic lift 33 so that the adsorption part 38 of the magnetic lift 33 grips the intermediate beam 35.

(2) Lift up the suction part 38 of the Magne Y I lift 33 and remove the intermediate beam 35 from the trolley hook.

(3) Suspend the adsorption part 38 of the magnetic lift 33 and separate it.

(4) Loosen the string winch 17 by the distance between the air cans 3.

According to the method for deploying and retrieving a physical exploration device according to the present invention,
Only four elements (1) to (4) above need to be worked on, and the number of air guns 3 is, for example, 36.

If the number of parahens is 6, then 4X42-168
Deployment and recovery will be possible with this work.

In addition, in the case of lifting and collecting, the order is reversed, and the intermediate beams 35 are lifted one after another by the magnetic lift 33 and the trolley 4 is lifted up.
If it is hooked to the hook of 0 and the string winch 17 is reeled in, it will be in a retracted state by itself.

Since the present invention is configured as described above, the following effects and effects can be obtained.

The number of tasks for deploying and retrieving the Jin geophysical exploration device S is only 2 compared to conventional methods.
It can be done continuously by the same worker, and it can be expanded and
Lifting and collecting work can be done extremely quickly.

Basically, the number of workers required for the geophysical exploration device S is one person to operate the magnetic lift 33 and one person to operate the string winch 17. beam 3
In the case of a hook hardware that requires guidance to be hooked onto the roller hook (No. 5) using a hoist, only one additional worker is required for this purpose, and an extremely small number of workers are required.

C. It is possible to perform the deployment and retrieval work of the geophysical exploration device S extremely safely and efficiently.

The operator of the Magne Drift 33 only needs to stand on the flat deck around the well 30 on the deck 41 and press the operation button. work can be done at a low location on a workbench that extends slightly forward of the deck, eliminating work on the rampway 13 and work on an elevated workbench where it is easy to fall into the deck. be able to.

Second, as explained in the previous embodiment, since the air gun 3 does not slide on the deck 41 or the rampway 13, damage to equipment such as the air gun 3 can be prevented.

E. Since the rope 34 connecting the air gun 3 and the buoy 9 is folded in half and suspended via the intermediate heater 1135, it is possible to lower the ceiling, and therefore, the restoration of the geophysical exploration vessel 1 is possible. It can be established as a ship rather than from a gender standpoint,
Moreover, unlike the conventional method, a large workbench is not required.

[Brief explanation of drawings]

Figure 1 is a plan view of a geophysical exploration vessel towing a plurality of air gun arrays that constitute the main parts of the geophysical exploration equipment in the longitudinal direction;
The figure is a plan view showing the main parts of a geophysical exploration vessel equipped with a plurality of air gun arrays in the width direction of the vessel, and FIG. 3 is a side view similar to that shown in FIG. 2. Figure 4 is a schematic explanatory diagram showing a conventional example in which a geophysical exploration device is housed in the stern of a geophysical exploration vessel, and Figures 5 and 6 are a state in which an air gun and a buoy that supports it are suspended from a rail. FIG. FIGS. 7 to 11 are explanatory diagrams showing a situation in which an array of air guns is retrieved from the stern of a geophysical exploration vessel and deployed into the sea. Figure 12 is a schematic diagram showing the state in which the air gun array constituting the main part of the geophysical exploration device has been lifted and retrieved from the stern of the geophysical exploration vessel according to the present invention, and Figures 13-A and B are the hoisted and retrieved air guns array that constitutes the main part of the geophysical exploration device. It is an explanatory diagram showing a state and a development state. FIGS. 14 to 22 are schematic explanatory diagrams showing a method for deploying and retrieving the physical exploration device according to the present invention. S... Geophysical exploration device, 1... Geophysical exploration vessel, 2... Streamer cable, 3... Air gun, 4... Array, 5... String, 6... Parahen, 8... Sea surface, 9... Buoy. , 10... buoy rope, 11...
・Buoy rope shank, 13... rampway, 14... deck, 15.16
...Rail, 17...String winch, 18...Trolley, 19
．． 20...Shackle, 21...Beam, 22...
Rope, 23... Shackle, 24... Rope, 25...
・Cylindrical body, 30...Well, 31...Rail, 31a
... Rail rear end, 32 ... Rail, 33 ... Magnet lift, 34 ... Rope, 35 ... Intermediate beam, 3
6...Trolley, 37...Hook, 38...Adsorption part, 39...Rope, 40...Trolley. Agent: Patent Attorney Shin Ogawa − Patent Attorney Ken Noguchi Teru Patent Attorney Kazuhiko Saishita

Claims (1)

[Claims] A rampway is formed at the stern of the ship, a well is provided at the rear end of the rampway, a rail is provided above the rampway and the well for running a trolley that supports the geophysical exploration device on the ship, and A rail for suspending the exploration device is provided, and the geophysical exploration device is composed of a buoy, a gun supported by the buoy, and a cable or chain connecting the buoy and the gun, and the cable or chain is connected to two A deployment and recovery device for an oceanographic physical exploration device, characterized in that it is configured to be suspended in a folded state.