JP2013036310A - Method to stop discharge of petroleum and the like caused by breakage of subsea oil-well steel pipe and the like - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method to stop oil discharge from a steel pipe, in case the steel pipe, which is installed at the seabed to take crude oil or natural gas, breaks.SOLUTION: In case that a deep-sea oil-well steel pipe 4 breaks undersea, a long non-magnetic insertion pipe 6 made of synthetic resin or the like with an approximately half the diameter of the steel pipe 4 is inserted through a breakage hole 5 of the steel pipe 4 down to a designated depth and is made stationary. After that, magnetic particles with diameters of a few millimeters to tens of millimeters are discretely poured from an upper hole 7 of the insertion pipe 6, stick by magnetic force to the inner surface of the steel pipe 4 around a bottom hole 8 of the insertion pipe 6, and join with each other forming a mass, suppressing discharge of crude oil. Finally, concrete is injected from the upper hole 7 of the insertion pipe 6, allowed to harden, and stops discharge of crude oil and the like.

Description

  In the present invention, when a steel pipe for sucking up crude oil or natural gas installed in the sea breaks, oil or the like flowing out from the steel pipe is closed.

  When oil flows out of a submerged oil well steel pipe breakage hole, it can be closed by inserting an insertion pipe through this hole and injecting concrete, it is pushed back by the oil pressure and dispersed in seawater and cannot be hardened.

  Therefore, as another method, another steel pipe is dug down near the place buried in the seabed and connected to the flank of the broken steel pipe buried in the seabed soil. A method may be employed in which concrete is injected after the shielding material is pushed in to prevent oil from flowing out. However, this method is difficult and difficult to solve in a short time.

  The present invention adopts a method of giving up and suppressing the crude oil flow prior to the concrete injection because the oil is pushed back by the oil pressure even if the concrete is injected simply by inserting the insertion pipe from the submerged oil well steel pipe breakage hole. is necessary.

  When the oil or natural gas well steel pipe 4 installed in the sea breaks, the insertion pipe 6 of a nonmagnetic material such as a long synthetic resin having a diameter about half that of the steel pipe 4 than the hole 5 of the broken portion of the steel pipe 4 is inserted. After being inserted to a predetermined depth and allowed to stand still, magnet particles 17 having a diameter of several to several tens of inches are dispersed and dropped from the upper port 7 of the insertion tube 6, and near the lower port 8 of the insertion tube 6. The steel pipe 4 is attached to the inner surface of the steel pipe 4 by magnetic force and joined together to form a lump, thereby suppressing the crude oil from flowing out, and then injecting and hardening the concrete 20 from the upper port 7 of the insertion pipe 6 to pump out oil, etc. How to close

  Inside the oil or natural gas well steel pipe 4 installed in the sea, give up a long insertion pipe 6 of non-magnetic material such as synthetic resin and hang it deeper than the sea bottom where the steel pipe 4 is likely to break, Should a crack or breakage occur in the steel pipe 4, magnet particles 17 having a diameter of several to several tens of inches are immediately dispersed and dropped from the upper opening 7 of the insertion pipe 6, and the lower opening 8 of the insertion pipe 6 is dropped. It is attached to the inner surface of the nearby steel pipe 4 by magnetic force, and combined with each other to form a lump, thereby suppressing the oil or natural gas from flowing out, and then pressing the concrete 20 or the like through the upper port 7 of the insertion pipe 6 to harden it. To close off the oil.

  When dropping the magnet grains 17 or the like into a long non-magnetic material insertion pipe 6 suspended in the oil or natural gas well steel pipe 4 installed in the sea, the upper opening of the insertion pipe 6 7 is sealed by a magnet particle feeding device 9 or the like to suppress the flow inside the insertion tube 6, and then the magnet particles 17 or the like in the feeding hole 12 are dropped into the insertion tube 6 to drop the magnet particles 17 or the like. It sinks without resistance and reaches the lower port 8 of the insertion tube 6, and adheres to the inner surface of the steel tube 4 near the lower port 8 of the insertion tube 6 by a magnetic force along the flow of oil in the steel tube 4. Expands upward and downward sequentially, overlaps and fills the inside of the steel pipe 4, and becomes a lump by magnetic force to suppress the oil or natural gas from flowing out, and then opens the spherical valve 16 etc. above the insertion pipe 6 to open the concrete 20. A method of closing oil or natural gas wells by press-fitting etc.

The longitudinal cross-sectional view which shows the closing method of the spilled oil from a subsea oil well pipe broken hole as an Example of embodiment of this invention As an example of an embodiment of the present invention, a longitudinal sectional view showing a cracked state in a steel pipe to which an insertion pipe is attached As an example of an embodiment of the present invention, a longitudinal sectional view showing a state of an initial stage of filling magnetic particles in a steel pipe Longitudinal sectional view showing the final stage of magnet particle filling in the steel pipe The longitudinal cross-sectional view which shows the state which attached the feeding apparatus, such as a magnet grain, on the insertion tube of this invention AA sectional view of FIG.

  When the oil or natural gas well steel pipe 4 installed in the sea is broken, a long non-magnetic material insertion pipe 6 such as a synthetic resin having a diameter approximately half the diameter of the steel pipe 4 than the hole 5 at the broken portion of the steel pipe 4 is predetermined. The steel tube near the lower port 8 of the insertion tube 6 is made to stand by being inserted to a depth of 1 mm, and then dispersed from the upper port 7 of the insertion tube 6 with a few 17 to several tens of magnet particles 17 and the like. 4 is attached to the inner surface by magnetic force and joined together to form a lump, thereby suppressing crude oil from flowing out, and then injecting and hardening concrete 20 from the upper port 7 of the insertion tube 6 to close off the oil and the like. how to

  Inside the oil or natural gas well steel pipe 4 installed in the sea, give up a long insertion pipe 6 of non-magnetic material such as synthetic resin and hang it deeper than the sea bottom where the steel pipe 4 is likely to break, Should a crack or breakage occur in the steel pipe 4, magnet particles 17 having a diameter of several to several tens of inches are immediately dispersed and dropped from the upper opening 7 of the insertion pipe 6, and the lower opening 8 of the insertion pipe 6 is dropped. It is attached to the inner surface of the nearby steel pipe 4 by magnetic force, and combined with each other to form a lump, thereby suppressing the oil or natural gas from flowing out, and then pressing the concrete 20 or the like through the upper port 7 of the insertion pipe 6 to harden it. To close off the oil.

  The insertion pipe 6 is made of a non-magnetic material such as a polyethylene pipe, a steel cable reinforced polyethylene pipe, an impact-resistant vinyl chloride pipe, or a stainless steel pipe.

  The magnet particles 20 may be several to several tens of inches in size, and may be mixed with sand or the like, placed in the feed hole 12 and rotated and dropped. Examples of the shape of the magnet grain 17 include a spherical shape, a circular trapezoidal shape, a meteorite shape, a dice shape, a water drop shape, a round bar shape, and a square bar shape. Moreover, you may mix and use with a steel ball, sand iron, etc.

  When dropping a large number of magnet grains 17 at the same time, each grain is wrapped in clay or mixed in a large amount of sand, and a method of dropping at a stretch using a device for dropping large magnet grains and the like is used.

  The outer periphery 13 and both side surfaces 14 of the rotating disk 11 of the magnet grain feeding device 9 are produced so as to slide and rotate with no gap between the device body 10 and completely seal the oil inside the insertion tube 6. it can. Therefore, the rising flow of oil etc. can be completely prevented.

  When the magnet grains 17 and the like are put into the feed hole 12 of the rotating disk 11 and rotated and sequentially lowered, the flow of oil and the like in the insertion tube 6 is suppressed, so the magnet grains 17 sink without resistance. Reaches the lower port 8 of the insertion pipe 6 and is washed away in the direction of arrows A and B shown in FIG. 3 along the flow of oil or the like in the steel pipe 4 and attached to the inner surface of the steel pipe 4 by magnetic force. The attachment surface gradually expands and overlaps as shown in FIG. 4 and fills the inside of the steel pipe 4. After suppressing the oil or natural gas from flowing out by magnetic force, the spherical valve 16 or the like above the insertion pipe 6 is opened. Concrete 20 or the like can be pressed and hardened to close off the oil or natural gas.

  When the steel pipe 4 is not damaged, it is possible to suck out oil or the like from the upper port 7 of the insertion pipe 6 and the spherical valve 16.

  In case of emergency of pipe breakage, this method of using magnet particles can be widely used

1.・ Sea level 2.・ The seabed 3.・ Seawater 4 ... Oil well steel pipe 5 ... Broken point of oil well steel pipe 6 ... Insertion pipe 7 ... Upper port of the insertion tube 8 ... Lower port of the insertion tube 9 ... Feeding magnet particles, etc. Device 10 ... Device body 11 ... Rotary disc 12 ... Rotary disc feed hole 13 ... Rotary disc outer periphery 14 ... Rotary disc side surface 15 ... Rotary disc Driving motor 16 ... spherical valve 17 ... magnet grain 18 ... steel ball 19 ... sand iron 20 ... concrete 21 ... mount

Claims (3)

  When the oil or natural gas well steel pipe 4 installed in the sea breaks, a long non-magnetic material insertion pipe 6 made of a synthetic resin or the like having a diameter approximately half that of the steel pipe 4 than the hole 5 at the broken portion of the steel pipe 4. Is inserted to a predetermined depth and allowed to stand still, then, several 17 to several tens of diameters of magnet grains 17 and the like are dispersed and dropped from the upper opening 7 of the insertion tube 6, and the lower opening 8 of the insertion tube 6 is dropped. It is characterized in that it is attached to the inner surface of a nearby steel pipe 4 by a magnetic force and is combined with each other to form a lump, thereby suppressing crude oil outflow, and then injecting and hardening concrete 20 from the upper port 7 of the insertion pipe 6. To close off the oil source due to damage to the offshore oil well steel pipe   Inside the oil or natural gas well steel pipe 4 installed in the sea, give up a long insertion pipe 6 of non-magnetic material such as synthetic resin and hang it deeper than the sea bottom where the steel pipe 4 is likely to break, Should a crack or breakage occur in the steel pipe 4, magnet particles 17 having a diameter of several to several tens of inches are immediately dispersed and dropped from the upper opening 7 of the insertion pipe 6, and the lower opening 8 of the insertion pipe 6 is dropped. The steel pipe 4 is attached to the inner surface of the nearby steel pipe 4 by magnetic force, and combined with each other to form a lump, thereby suppressing oil or natural gas from flowing out, and then pressing the concrete 20 or the like through the upper port 7 of the insertion pipe 6 to harden it. The method of closing offflow of oil etc. due to breakage of an underwater oil well steel pipe or the like according to claim 1   When dropping the magnet grains 17 etc. into the long non-magnetic insertion tube 6 made of synthetic resin or the like suspended in the oil or natural gas well steel pipe 4 installed in the sea, After the mouth 7 is sealed with a magnet grain feeding device 9 or the like to suppress the flow inside the insertion tube 6, the magnet grain 17 or the like in the feeding hole 12 is dropped into the insertion tube 6 to drop the magnet grain 17 or the like. Sinks without resistance and reaches the lower port 8 of the insertion tube 6, and adheres to the inner surface of the steel tube 4 near the lower port 8 of the insertion tube 6 by a magnetic force along the flow of oil in the steel tube 4. Expands upward and downward sequentially, overlaps and fills the inside of the steel pipe 4, and becomes a lump by magnetic force to suppress the oil or natural gas from flowing out, and then opens the spherical valve 16 etc. above the insertion pipe 6 to open the concrete 20. The underwater oil well according to claim 1, wherein the oil is cured by press-fitting etc. A method of closing the gush of oil, etc. due to the damage of pipes, etc.

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