JP6037945B2 - Fluid collecting apparatus and collecting method - Google Patents

Description

  The present invention relates to a fluid collecting apparatus that closes a leak hole caused by corrosion or damage in a pipeline that conveys a fluid such as a gas laid on the seabed, and collects the fluid leaking from the leak hole And a collection method.

Conventionally, as shown in FIG. 8, a pipeline 1 that conveys a fluid such as gas or oil is laid on the seabed. Corrosion of this pipeline or dredging of a navigating ship, etc. may damage some gas conduits in the pipeline 1 or cause cracks to form holes 2 (hereinafter referred to as leakage holes). was there. As a result, gas, oil, or the like inside the gas conduit may be ejected from the leak hole 2 into the sea.
In this case, if the damaged leak hole 2 is not repaired promptly, the gas released from the gas conduit into the sea is diffused and released from the sea surface into the atmosphere. There was a possibility that a secondary disaster would occur.

In such a case, in order to prevent a secondary disaster and to suppress a large amount of gas emission, it was necessary to stop the ejection of gas from the leak hole 2 as soon as possible. However, as described above, since there was no effective means for quickly stopping the ejection of gas from the leak hole, the gas remained leaking from the leak hole until the major repair of the gas conduit was completed.
Further, when repairing the leak hole 2 of the gas conduit, the gas pressure in the pipeline 1 is reduced because the gas conveyance in the pipeline 1 is stopped and repaired. Therefore, when the pipeline 1 is installed on the seabed, the gas from the leak hole 2 is reduced. There was a problem that seawater entered the conduit, and there was concern that the repair work would be complicated and large.

  Moreover, when the leak hole 2 generate | occur | produces in a gas conduit | pipe, the emergency sealing tool disclosed by patent document 1, for example is proposed as an instrument which plugs up the leak hole 2 and repairs it. In order to close the leak hole 2 generated in the gas conduit, this emergency sealer connects a diffusion pipe having a shut-off valve to an attachment plate to which a sealing material having a concave portion formed on the inner surface is bonded, and seals the diffusion pipe It communicates with the concave part of the material.

The seal material of this emergency sealing tool is pressed against the leak hole 2 of the gas conduit to surround the leak hole 2 with the seal material. Then, the attachment plate and the gas conduit are wound with two belts on both sides of the diffusion tube, and the belt is tightened so that the sealing material is in close contact with the outer surface of the gas conduit.
As a result, the gas leaking from the leak hole of the gas conduit is released from the recessed portion through the diffusion pipe, and when the cock of the shutoff valve of the diffusion pipe is closed, the gas emission stops, and the gas leakage is prevented by the sealing effect of the sealing material. It can be prevented as soon as possible.

JP-A-9-229289

  However, the emergency sealing device disclosed in Patent Document 1 is intended for underground pipes and the like, and in a pipeline laid on the sea floor, when a band is wound around an attachment plate and a gas conduit There was a drawback that it was difficult to pass the band under the gas conduit because the bedrock or sand on the seabed where the pipeline was installed obstructed, and the leak hole could not be repaired quickly.

The present invention has been made in view of such circumstances, and provides a fluid collecting device and a collecting method that quickly suppresses fluid from leaking from a leak hole generated in a tubular body. For the purpose.
Another object of the present invention is to provide a fluid collecting device and a collecting method which can quickly suppress the fluid from leaking to the outside through a leak hole formed in a tubular body installed on the seabed. is there.

A fluid collecting device according to the present invention is a fluid collecting device for collecting fluid leaking from a leak hole formed in a tube carrying fluid, and is attached to the tube and supported by the fitting The supporting member formed in the supporting member, the fixing member provided so as to be able to advance and retreat, the fluid leaking by closing the leakage hole of the tube body is collected or sealed, and is fixed between the tube body by the fixing member. And a collection port.
According to the present invention, in a state where the attachment of the collecting device is attached to the tube, the leak hole of the tube is closed by the collecting port, and further, the collecting port is pressed and fixed to the leak hole by the fixing member. Thus, the leakage hole can be closed, and the fluid leaking from the leakage hole can be collected or sealed from the collection port.

Moreover, it is preferable that the fixture is provided with the magnet which can adhere to a tubular body.
By attaching the fixture to the tube near the leak hole with a magnet, press the collection port in the direction of pressing the leak hole with the fixing member that extends from the support member while the leak hole is blocked by the collection port. Can be closed and fixed

Further, a hose is connected to the collection port, and the fluid leaking from the leak hole may be collected from the collection port through the hose.
The fluid leaking from the leak hole can be collected through a hose provided at the collection port that closes the leak hole of the tube, and then various processes such as measurement of the amount of leaked fluid, deodorization treatment, incineration treatment, etc. Yes.

Moreover, the pipe body may be a pipeline installed on the seabed.
If the pipe body is a pipeline installed on the sea floor, when repairing the leak hole of the pipe body, if the pressure of the fluid in the pipe body is lowered from seawater, seawater will flow in and the repair will be large-scale According to the present invention, since the fluid can be collected by the collecting device, full-scale repair can be performed after performing an emergency process without reducing the pressure of the fluid.

The fluid collecting method according to the present invention includes a step of attaching a mounting tool to both sides or one side of a leak hole formed in a pipe carrying a fluid, a step of closing the leak hole with a collecting port, and a fixing member provided in the mounting tool. The collection port is pressed against the leak hole of the tubular body by closing and advancing and closing the leak hole.
According to the present invention, in a state where the attachment of the collecting device is attached to the tubular body, the leakage hole of the tubular body is blocked by the collecting port portion, and further, the collecting opening portion is pressed toward the leakage hole side by the fixing member. Therefore, it is possible to quickly prevent the fluid from leaking from the leak hole.

Moreover, it is preferable that an attachment tool is equipped with the magnet which can adhere to a tubular body.
The attachment can be attached and fixed to the pipe near the leak hole with a magnet, so even if there are obstacles such as bedrock or sand on the back of the pipe, the attachment can be easily and quickly attached to the pipe. Can close the leak hole.

Moreover, it is preferable to attach an attachment tool to a tubular body in a state where the attachment tool, the support member, and the fixing member are assembled in advance.
When closing a leak hole generated in the tube with the collection port, the mounting mechanism consisting of the fixture, support member, and fixing member is pre-assembled, so the mounting part can be quickly attached to the tube without any assembly work. In addition, since the collection port portion that blocks the leak hole can be pressed and closed with the fixing member, the number of steps of the leak hole closing operation is small, and the leak hole can be quickly closed.

According to the leakage fluid collecting device and the collecting method according to the present invention, after the fitting hole is attached to the tube body, the leakage hole of the tube body is closed by the collection port portion, and then the collection port portion is placed on the leakage hole side by the fixing member. The fluid leaking from the leakage hole can be quickly collected or sealed through the collection port.
In addition, since there is no need to wrap the tube body and the collection port portion with a band, the leak hole can be quickly and easily closed with the collection port portion even if the tube installation position is a non-free place such as the seabed.

It is a front view which shows the collection apparatus by embodiment of this invention. FIGS. 2A and 2B show an attachment mechanism of the collecting device shown in FIG. 1, wherein FIG. The elbow joint which comprises a collection port part, and the nipple provided with opening are shown, (a) is a side view, (b) is a bottom view. It is a figure which shows the collection method of the collection device by embodiment, Comprising: It is a figure which shows the process which installed the attachment mechanism in the gas conduit of a pipeline. (A) is a figure of the process of bringing a collection mouth part close to the leak hole of a gas conduit, (b) is a figure of the process of having piled up a collection mouth part on a leak hole. It is a figure which shows the state which pushed the fixing bolt and pressed and fixed the collection port part on the leak hole of the gas conduit. It is a figure which shows the state which installs the collection apparatus by embodiment in the leak hole of the gas conduit of the pipeline installed in the seabed, connects the hose of a collection port part to the work ship on the sea, and collects gas. It is a figure which shows the state which gas leaks to the sea from the leak hole produced in the gas conduit of the conventional pipeline.

Hereinafter, a gas collecting apparatus and a collecting method according to an embodiment of the present invention will be described with reference to FIGS. 1 to 7, and the same reference numerals are used for the same parts or members as those of the above-described conventional technology. To do.
In the gas collection device 10 according to the present embodiment, for example, in a state where a pipeline 1 for conveying a gas having a pressure higher than seawater is installed on the seabed, a leak hole 2 is generated in a gas conduit 1a that is a part of the pipe It is an apparatus for recovering the gas ejected in the event of a failure.
A gas collecting device 10 shown in FIG. 1 penetrates through a pair of attachment portions 11 as attachment tools, a support plate 12 as a support member installed between these attachment portions 11, and a central hole 12 a of the support plate 12. And a gate-type mounting mechanism 14 having a fixing bolt 13 as a fixing member.

As shown in FIGS. 3 and 5, the gas collection device 10 is a member separate from the attachment mechanism 14, and as a collection port 9 for collecting the gas ejected from the leak hole 2 of the gas conduit 1 a. A substantially L-shaped elbow joint 16 is provided. A nipple 17 having a gas recovery opening 17a is provided at one end of the elbow joint 16, and a ring-shaped contact rubber 18 is bonded to the opening 17a of the nipple 17 as an elastic member. A hose 19 is connected to the other end side of the elbow joint 16 via a hose nipple 17b, and the hose 19 extends, for example, to a marine work vessel.
The opening 17a of the elbow joint 16 is opposed to the leak hole 2 formed in the gas conduit 1a so that the leak hole 2 is airtightly closed with the contact rubber 18 so that the gas ejected from the leak hole 2 passes through the elbow joint 16 and the hose 19. Can be guided in.

In the attachment mechanism 14 shown in FIGS. 1 and 2, a pair of attachment portions 11 are provided, and a magnet 21 that is attracted to the metal gas conduit 1 a and a shaft member 20 that is connected to the upper portion of the magnet 21 are provided. It has been. The magnet 21 may be either a permanent magnet or an electromagnet, but it is preferable to use an electromagnet that can be switched on and off by an electric current.
The bottom surface 21a of the magnet 21 of the mounting portion 11 is formed in a concave curved surface shape along the curved surface of the gas conduit 1a when viewed from the front direction (see FIG. 1), and the bottom surface 21a is viewed from the side direction orthogonal to the concave curved surface. And the recessed part 21b which becomes non-contact with the gas conduit | pipe 1a is formed in the center part (refer FIG.2 (b)).
The shaft member 20 of the attachment portion 11 is male threaded, and a plurality of, for example, three nuts 22 are screwed onto the shaft member 20. A through hole 23 and a long hole 24 are formed at both ends in the longitudinal direction of the support plate 12, and each shaft member 20 is inserted into the through hole 23 and the long hole 24.

Here, in the plurality of nuts 22, the one arranged between the support plate 12 and the magnet 21 is a height adjusting nut 22 a, and any number can be selected. A nut 22 disposed on the support plate 12 is a fixing nut 22 b that fastens and fixes the support plate 12 to the shaft member 20.
Further, in the support plate 12, before the fixing nut 22 b is fastened to the shaft member 20, the distance between the one attachment portion 11 and the other attachment portion 11 can be adjusted within the range of the long hole 24 formed in the support plate 12. Note that the through hole 23 may also be formed as a long hole. In this case, there is an advantage that the range in which the distance between the pair of attachment portions 11 can be adjusted is widened.

A fastening nut 26 is fixed to the upper surface (or lower surface) of the central hole 12a formed in the center of the support plate 12, and the fixing bolt 13 is screwed to the fastening nut 26 through the central hole 12a. . Therefore, the fixing bolt 13 can be moved forward and backward with respect to the support plate 12 by rotating the fixing bolt 13 forward and backward.
The gas collection device 10 according to the present embodiment has a configuration in which the elbow joint 16 is bent in a substantially L shape and the hose 19 is connected to the other end, so that the leak hole of the gas conduit 1a is opened at the opening 17a of the elbow joint 16. 2, the upper surface of the elbow joint 16 can be pressed and fixed by the fixing bolt 13 of the mounting mechanism 14.

The collection device 10 according to the present embodiment has the above-described configuration. Next, a leakage gas collection method using the collection device 10 will be described with reference to FIGS. 4 to 7.
If the gas conduit 1a is damaged or broken due to corrosion or soot colliding with the gas conduit 1a of the pipeline 1 installed on the seabed and the leak hole 2 is generated, the conveyed pressurized gas is leaked from the leak hole 2 From the sea (see Fig. 8). When the worker's diver finds such an accident, the collection device 10 promptly performs the collection process for stopping the gas leakage from the leak hole 2 urgently.

First, the gate-type mounting mechanism 14 of the collection device 10 is assembled in advance on an offshore work boat. That is, the attachment mechanism 14 is temporarily assembled between the pair of attachment portions 11 by temporarily fixing the support plate 12 to which the fixing bolt 13 is attached. The worker's diver then dives on the seabed with the attachment mechanism 14 and the collection port 9 with the hose 19.
When reaching the position of the gas conduit 1a where the leak hole 2 of the pipeline 1 installed on the seabed is generated, in FIG. 4, the mounting mechanism 14 is disposed on both sides of the gas conduit 1a in the circumferential direction or the longitudinal direction with the leak hole 2 interposed therebetween. The pair of attachment portions 11 are arranged to face each other, and the interval between the pair of attachment portions 11 is adjusted by the long holes 24 of the support plate 12 so that the fixing bolt 13 of the support plate 12 is positioned immediately above the leak hole 2. .

Next, each magnet 21 is turned on, and the concave curved surface of the bottom surface 21a of each mounting portion 11 is attracted to and fixed to the curved surface of the gas conduit 1a.
In this way, as shown in FIG. 4, the leakage gas is ejected from the leakage hole 2 located between the pair of attachment portions 11 toward the support plate 12.

Next, as shown in FIG. 5 (a), the worker's diver moves the collection port 9 provided at the tip of the collection hose 19 onto the leak hole 2 of the gas conduit 1 a, The opening 17 a is installed between the leakage hole 2 and the fixing bolt 13 of the support plate 12. Then, the opening 17a of the nipple 17 is pressed against the leak hole 2 via the contact rubber 18 having high adhesion, and the jet gas is adjusted to flow into the collecting hose 19.
In this state, the fixing bolt 13 provided on the support plate 12 is tightened against the fastening nut 26, and the elbow joint 16 is firmly pressed against the leakage hole 2 of the gas conduit 1a with the tip of the fixing bolt 13, thereby contacting rubber in the opening 17a. 18 and fix tightly.

In this way, the leak hole 2 of the gas conduit 1a installed on the sea floor can be closed with the nipple 17 and the contact rubber 18 provided in the collection port portion 9, and connected to the elbow joint 16 as shown in FIG. The leaked gas can be transferred to a work ship provided on the sea via the hose 19 and collected.
Therefore, when the leak hole 2 is found, the collection port portion 9 of the collecting device 10 is quickly attached to the leak hole 2 and the leaked gas ejected from the leak hole 2 is quickly collected to prevent the leakage gas from spreading. The next disaster can be prevented. Further, it is possible to perform processing such as measurement of the amount of gas leakage and deodorization, incineration or recovery of the leaked gas on the work boat.
And, in a short period of time in which the leak gas is promptly collected by the collecting device 10, another device is prepared and the leak hole 2 is buried, so that the leak hole 2 is firmly and permanently repaired. It can be carried out.

As described above, according to the leakage gas collection device 10 and the collection method according to the present embodiment, even if the gas conduit 1a having the leakage hole 2 is installed on the seabed, the gas leakage is provided on the pair of attachment portions 11 of the collection device 10. The magnet 21 is adsorbed and fixed to the gas conduit 1a, and the leak hole 2 can be closed with the opening 17a of the collection port 9 and pressed and fixed with the fixing bolt 13. Therefore, the leak hole 2 can be temporarily closed and the gas can be recovered. Quick and easy adsorption and fixation.
In addition, the collection port 9 is firmly and hermetically sealed by pressing the opening 17a of the nipple 17 against the leakage hole 2 via the contact rubber 18 and pressing the back of the elbow joint 16 against the leakage hole 2 with the fixing bolt 13. Therefore, as in the prior art described above, the collection port 9 can be connected to the gas conduit 1a quickly and easily as compared with the case where the leak hole 2 of the gas conduit 1a is covered with a sealing tool and wound with a band. Can be fixed.

Further, by closing the leak hole 2 at the opening 17a of the collection port portion 9, the leaked gas can be transferred to the work ship through the hose 19 and collected, so that the gas treatment such as measurement of gas leakage, deodorization, incineration, etc. It is possible to treat the leaked gas at sea.
In addition, gas leakage from the leak hole 2 can be prevented by closing the leak hole 2 with the opening 17a and the contact rubber 18 and pressing the elbow joint 16 with the fixing bolt 13, so that the gas pressure in the gas conduit 1a is maintained. Since the leaked gas can be recovered in the state where the water is discharged, seawater can be prevented from entering from the leak hole 2.
Further, since the gas jet flow / leakage from the leak hole 2 can be reduced by the collecting port portion 9, the internal pressure of the gas conduit 1a can be maintained, seawater can be prevented from entering from the leak hole 2, and the leaked gas jet flow can be reduced. Since bubbles near the leak hole 2 are not generated, it is possible to secure the field of view of the diver's worker who performs the repair preparation work near the seabed, and to reduce the burden.

  In addition, the leakage hole which can collect | recover by suppressing that gas blows out in the sea from the leakage hole 2 which arose in the gas conduit | pipe 1a of the pipeline 1 which conveys gas using the gas collection apparatus 10 by embodiment of this invention For example, the inner diameter of the gas in the pipeline 1 is preferably about 2 MP or less.

In addition, this invention is not limited to the above-mentioned embodiment, In the range which does not change the summary of this invention, the structure of embodiment mentioned above can be changed suitably.
For example, in the gas collecting apparatus 10 and the collecting method using the same according to the above-described embodiment, when the leak hole 2 is generated in the gas conduit 1a of the pipeline 1 installed on the seabed, the pressure gas ejected from the leak hole 2 However, the present invention is not limited to the gas conduit 1a on the seabed, and can cope with gas leakage from the gas conduit 1a installed on the ground or in the ground.

  In the above-described embodiment, the fluid ejected from the leak hole 2 is a gas such as natural gas. However, the present invention is not limited to such an embodiment. Leakage caused by corrosion, damage, etc. in the gas conduit 1a which is a part of the pipeline 1 for transporting other fluids having an appropriate pressure, such as gas such as other inert gas or active gas, fluid such as petroleum, etc. The present invention can be applied to various collection devices 10 and collection methods for collecting fluid by closing the leakage hole 2 in response to an accident or emergency situation where fluid is ejected from the hole 2 to the outside.

In the above-described embodiment, in the collection device 10, the hose 19 is connected to the collection port portion 9 having the elbow joint 16 and the opening 17 a of the nipple 17, but the hose 19 is not necessarily provided in the collection port portion 9. Alternatively, the leak hole 2 may be sealed with the opening 17a of the nipple 17 or the elbow joint 16 so that the gas is not ejected from the conduit 1a.
In addition, the collection device 10 described above is provided with a pair of attachment portions 11 to support the support plate 12 and presses the elbow joint 16 with the fixing bolts 13 provided on the support plate 12. It is also possible to support the support plate 12 on which only one side is provided with the fixing bolt 13 and cantilevered.

DESCRIPTION OF SYMBOLS 1 Pipeline 1a Gas conduit 2 Leakage hole 9 Collection port part 10 Collection apparatus 11 Attachment part 12 Support plate 13 Fixing bolt 14 Attachment mechanism 16 Elbow joint 17 Nipple 17a Opening 18 Contact rubber 19 Hose 20 Shaft member 21 Magnet

Claims (8)

A fluid collecting device for recovering fluid leaking from a leak hole generated in a pipe carrying fluid,
A fitting attached to the tubular body, a support member supported by the fitting, a fixing member provided to be able to advance and retreat in the supporting member, and a fluid leaking by closing the leakage hole of the tubular body A fluid collecting device comprising: a sealing port portion that is sealed and fixed between the fixing member and the tubular body.   The fluid collecting device according to claim 1, wherein the attachment includes a magnet that can be fixed to the tube.   The fluid collection device according to claim 1, wherein a hose is connected to the collection port, and fluid leaking from the leak hole is collected through the hose from the collection port.   The fluid collecting device according to any one of claims 1 to 3, wherein the tubular body is a pipeline installed on a seabed.     A step of attaching attachments to both sides or one side of a leakage hole formed in a pipe that conveys fluid; a step of closing the leakage hole with a collection port; and a step of moving a fixing member provided in the attachment to advance and retract the collection port A fluid collecting method, wherein the leaking hole is closed by pressing the portion against the leaking hole of the tubular body.   The fluid collecting method according to claim 5, wherein the attachment includes a magnet that can be fixed to the tube.   The fluid collecting method according to claim 5 or 6, wherein the attachment member, the support member, and the fixing member are assembled in advance, and the attachment member is attached to the tube body.   The fluid collecting method according to claim 5, wherein the tubular body is a pipeline installed on a seabed.

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