GB2496460A - Method for sealing off discharge of oil etc. caused by breakage of steel pipe etc. of undersea oil well - Google Patents
Method for sealing off discharge of oil etc. caused by breakage of steel pipe etc. of undersea oil well Download PDFInfo
- Publication number
- GB2496460A GB2496460A GB1122093.6A GB201122093A GB2496460A GB 2496460 A GB2496460 A GB 2496460A GB 201122093 A GB201122093 A GB 201122093A GB 2496460 A GB2496460 A GB 2496460A
- Authority
- GB
- United Kingdom
- Prior art keywords
- pipe
- magnetic particles
- petroleum
- steel pipe
- carrying pipe
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 53
- 239000010959 steel Substances 0.000 title claims abstract description 53
- 238000000034 method Methods 0.000 title claims abstract description 15
- 238000007789 sealing Methods 0.000 title abstract 3
- 239000003129 oil well Substances 0.000 title abstract 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims abstract description 18
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 10
- 239000003345 natural gas Substances 0.000 claims abstract description 9
- 239000004570 mortar (masonry) Substances 0.000 claims abstract description 6
- 239000002343 natural gas well Substances 0.000 claims abstract description 5
- 239000006249 magnetic particle Substances 0.000 claims description 63
- 239000003208 petroleum Substances 0.000 claims description 20
- 239000002184 metal Substances 0.000 claims description 13
- 229910052751 metal Inorganic materials 0.000 claims description 13
- 239000004698 Polyethylene Substances 0.000 claims description 12
- -1 polyethylene Polymers 0.000 claims description 12
- 229920000573 polyethylene Polymers 0.000 claims description 12
- 239000003209 petroleum derivative Substances 0.000 claims description 10
- 230000000903 blocking effect Effects 0.000 claims description 4
- 230000001464 adherent effect Effects 0.000 claims description 3
- 238000005192 partition Methods 0.000 claims description 3
- 239000003921 oil Substances 0.000 abstract description 9
- 238000003780 insertion Methods 0.000 abstract description 5
- 230000037431 insertion Effects 0.000 abstract description 5
- 239000010779 crude oil Substances 0.000 abstract description 3
- 238000005086 pumping Methods 0.000 abstract 1
- 239000002131 composite material Substances 0.000 description 15
- 239000004927 clay Substances 0.000 description 5
- 229910001120 nichrome Inorganic materials 0.000 description 4
- 239000012256 powdered iron Substances 0.000 description 3
- 239000004576 sand Substances 0.000 description 3
- 239000010935 stainless steel Substances 0.000 description 3
- 229910001220 stainless steel Inorganic materials 0.000 description 3
- 229910000881 Cu alloy Inorganic materials 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000003014 reinforcing effect Effects 0.000 description 2
- 239000013535 sea water Substances 0.000 description 2
- 241000272470 Circus Species 0.000 description 1
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 1
- 241001122767 Theaceae Species 0.000 description 1
- BZHJMEDXRYGGRV-UHFFFAOYSA-N Vinyl chloride Chemical compound ClC=C BZHJMEDXRYGGRV-UHFFFAOYSA-N 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 229920013716 polyethylene resin Polymers 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/13—Methods or devices for cementing, for plugging holes, crevices or the like
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B29/00—Cutting or destroying pipes, packers, plugs or wire lines, located in boreholes or wells, e.g. cutting of damaged pipes, of windows; Deforming of pipes in boreholes or wells; Reconditioning of well casings while in the ground
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/01—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells specially adapted for obtaining from underwater installations
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/12—Methods or apparatus for controlling the flow of the obtained fluid to or in wells
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Rigid Pipes And Flexible Pipes (AREA)
Abstract
[Problem] To provide a method for sealing off oil discharged from a broken undersea steel pipe for pumping crude oil or natural gas. [Solution] Provided is a method for sealing off discharge of oil or the like, wherein when an undersea steel pipe (4) of an oil well or a natural gas well is broken, magnetic grains (21) are fed deep into the sea through an insertion pipe (6) suspended inside the steel pipe (4). Therefore, the discharge of oil or the like from a lower part of the insertion pipe (6) is sealed off by a gate valve (20) that is provided at a lower part of an apparatus (12) for feeding magnetic grains or the like, the apparatus being attached to a pipe upper opening (7). Thereafter, pressured water is introduced into a storage chamber (14) for magnetic grain or the like in the feeding apparatus (12) to wash down the magnetic grains (21) or the like inside the chamber into the insertion pipe (6), and further down to the lower end of the insertion pipe (6). Furthermore, the magnetic grains are caused to adhere to the inner surface of the steel pipe (4) by a magnetic force to form aggregates, thereby suppressing the discharge of oil or natural gas and enabling subsequent introduction of mortar or concrete (27).
Description
DESCRiPTION
[Title of Invention]
METhOD FOR BLOCKING OUTFLOW OF PETROLEUM OR THE LIKE
DUE TO DAMAGE TO SUBSEA PETROLEUM WELL STEEL PIPE OR THE
LIKE
[Thchnical Fieldi
[0001] The present invention blocks a flow of crude oil or natural gas from a steel pipe for extracting the oil or the like that has been installed in the sea when the steel pipe is broken.
[Background Art]
[00021 As a method to, when oil flows out from a hole caused by damage to a subsea petroleum well steel pipe, block the hole, inserting a carrying pipe from the hole and injecting concrete is conceivable. However, even if this method is carried out, it is not possible to cure concrete because the outflow pressure of oil pushes back the concrete and the concrete is dispersed in the seawater.
[0003] Accordinglv the following method may be used as an alternative. A steel pipe is buried near the place where a petroleum well steel pipe has been buried in the seafloor. Then, the steel pipe is connected to the side wall of the damaged steel pipe in the place where it has been buried in the seafloor. Then, a harrier material is charged through the steel pipe so as to suppress the outflow of oil.
After that, concrete is injected. This method, however, requires troublesome large-scale work, and it is therefore difficult to complete in a short time.
[Summary of Inventioni
[Thchnical Problem] [0004] Mere insertion of a carrying pipe into a hole caused by damage to a subsea petroleum well steel pipe results in, even if concrete is injected, the concrete being pushed back by the outflow pressure of oil. Accordingly, an object of the present invention is to provide a method with which the outflow of crude oil is suppressed prior to injection of concrete.
[Method of Solving the Problem] [00051 When damage occurs to a steel pipe 4 for petroleum or natural gas well that has been installed in the sea, magnetic particles 21 or the like are sent deeply into the seafloor through a carrying pipe 6 that has been installed and suspended inside the steel pipe 4. lb implement this, the outflow of petroleum or the like coming from a lower portion of the carrying pipe 6 is blocked by a gate valve 20 provided at a lower portion of a feeding equipment 12 for feeding magnetic particles or the like attached to an upper opening 7 of the carrying pipe 6. After that, a switching valve 19 provided at an upper portion of the equipment and the gate valve 20 are opened simultaneously so as to inject pressurized water into a housing 14 accommodating magnetic particles or the like of a rotary disk 13 to sweep the magnetic particles 21 or the like in the housing 14 into the carrying pipe 6 and drop the magnetic particles 21 or the like to the lower end of the carrying pipe 6. The magnetic particles 21 or the like thereby move along the flow of petroleum or the like in the steel pipe 4 and reach a conical metal mesh 11 attached to the carrying pipe 6. The magnetic particles 21 or the like are blocked up by the conical metal mesh 11 and magnetically adhere to an inner surface of the steel pipe 4. The resulting adherent layer gradually grows downward and reaches a circular mesh plate 8 provided at a tip portion of the carrying pipe 6.
The magnetic particles 21 or the like then fill the inside of the steel pipe 4 and form a mass due to magnetic force, suppressing the outflow of petroleum or natural gas. After that. mortar, concrete 27 or the like is injected from the upper opening 7 of the carrying pipe 6 and cured to block the outflow of petroleum or natural gas.
[Brief Description of Drawingsl
[00061 FIG. 1 is a vertical cross-sectional view showing a state in which a steel pipe including a carrying pipe therein according to an embodiment of the present invention has been cracked.
FIG. 2 is an enlarged vertical cross-sectional view showing a part of FIG. 1.
FIG. 3 is a cross-sectional view taken along the line A-A shown in FIG. 2.
FIG. 4 is a vertical cross-sectional view showing the initial stage of charging magnetic particles into a steel pipe according to an embodiment of the present invention.
FIG. 5 is a vertical cross-sectional view showing the final stage of charging magnetic particles into the steel pipe.
FIG. 6 is a vertical cross-sectional view showing a state in which a feeding equipment for feeding magnetic particles or the like has been attached above a carrying pipe of the present invention.
FIG. 7 is a cross-sectional view taken along the line B-B shown in FIG. 6.
FIG. 8 is a plan view of a magnetic particle composite bar used to carry out the present invention.
FIG. 9 is a cross-sectional view taken along the line CC shown in FIG. 8.
FIG. 10 is a vertical cross-sectional view of a steel wire rope-reinforced polyethylene carrying pipe used to carry out the present invention.
FIG. 11 is a cross-sectional view taken along the line D-D shown in FIG. 10.
[Description of Embodimentsl
[0007] When damage occurs to a steel pipe 4 for petroleum or natural gas well that has been installed in the sea, magnetic particles 21 or the like are sent deeply into the seafloor through a carrying pipe 6 that has been installed and suspended inside the steel pipe 4. lb implement this, the outflow of petroleum or the like coming from a lower portion of the carrying pipe 6 is blocked by a gate valve 20 provided at a lower portion of a feeding equipment 12 for feeding magnetic particles or the like attached to an upper opening 7 of the carrying pipe 6. After that, a switching valve 19 provided at an upper portion of the equipment and the gate valve 20 are opened simultaneously so as to inject pressurized water into a housing 14 accommodating magnetic particles or the like of a rotary disk 13 to sweep the magnetic particles 21 or the like in the housing 14 into the carrying pipe 6 and drop the magnetic particles 21 or the like to the lower end of the carrying pipe 6. The magnetic particles 21 or the like thereby move along the flow of petroleum or the like in the steel pipe 4 and reach a conical metal mesh 11 attached to the carrying pipe 6. The magnetic particles 21 or the like are blocked up by the conical metal mesh 11 and magnetically adhere to an imier surface of the steel pipe 4. The resulting adherent layer gradually grows downward and reaches a circuku mesh plate 8 provided at a tip portion of the carrying pipe 6.
The magnetic particles 21 or the like then fill the inside of the steel pipe 4 and form a mass due to magnetic force, suppressing the outflow of petroleum or natural gas. After that, mortar, concrete 27 or the like is injected from the upper opening 7 of the carrying pipe 6 and cured to block the outflow of petroleum or natural gas.
[00081 Tn order to avoid a situation in which it is difficult to feed individual magnetic particles due to adhesion of magnetic particles to each other, a paper-wrapped magnetic particle composite bar 15 is created. The magnetic particle composite bar 15 is an elongated bar in which non-magnetic clay 22 is present between a plurality of magnetic particles. The magnetic particle composite bar 15 is inserted in the housing 14 of the feeding equipment 12 for feeding magnetic particles or the like, and the magnetic particle composite bar 15 is caused to flow into the carrying pipe 6 by the pressurized water. When the magnetic particle composite bar 15 moves from the bottom of the carrying pipe 6 to the steel pipe 4, soluble wrapping paper 23 is dissolved by petroleum or the like, and the magnetic particles 21 are dispersed. The individual magnetic particles 21 firmly adhere to the inner surface of the steel pipe 4. The magnetic particles are sent in this manner.
[0009] As shown in FIG. 6, a non-magnetic receiving frame 16 is provided in the housing 14 of the feeding equipment 12 for feeding magnetic particles or the like.
Four paper-wrapped magnetic particle composite bars 15 are inserted into the receiving frame 16. The magnetic particle composite bars 15 are elongated bars in which the clay 22 is present between a plurality of magnetic particles. The rotary disk 13 is rotated to move the magnetic particle composite bars 15 to the position of the carrying pipe 6. When the switching valve 19 and the gate valve are opened, the four magnetic particle composite bars 15 are simultaneously fed by the pressurized water delivered by a pump or the like to respective four sections of the carrying pipe 6 defined by a partition 31, with the receiving frame 16 left in place. The rotary disk 13 includes eight housings 14, and the magnetic particle composite bars 15 loaded in housings 14 are fed in sequence. Accordingly a large amount of magnetic particles 21 can be continuously fed to the carrying pipe 6.
[ooio] When feeding of the magnetic particle composite bars 15 has finished, the switching valve 19 for pressurized water is switched to a secondary conduit 36, and the gate valve 20 of the housing 14 is closed. Consequently, the pressurized water flows into the carrying pipe 6 through the secondary conduit 36. Therefore, the magnetic particle composite bars 15 that have been sent previously are smoothly swept downward.
boil] As the carrying pipe 6, pipes made of nonmagnetic material can be used such as a polyethylene pipe. a steel wire rope-reinforced polyethylene pipe, an impact resistant vinyl chloride pipe and a stainless steel pipe. It is most appropriate to use a steel wire rope-reinforced polyethylene pipe 29 as the carrying pipe 6. As used herein, "steel wire rope-reinforced polyethylene pipe 29" refers to a pipe reinforced with a plurality of flexible steel wire ropes 30 in order to resist breakage of the steel pipe 4. The plurality of flexible steel wire ropes 30 are circumferentially disposed and buried inside the pipe wall and each extends in the axial direction thereof There are projections and depressions in the surface of a steel wire rope 30 and thus the steel wire rope 30 can be firmly adhered to and integrated with polyethylene resin. A pipe connector 32 for connecting the pipes includes a reinforcing metal mesh 33 buried near the outer circumference surface and a nichrome wire 34 buried near the inner circumference surface. The pipe connector 32 is produced by injection molding. An end of the steel wire rope-reinforced polyethylene pipe 29 is inserted into a receptacle in the inner circumference of the pipe connector 32, and electric current is applied to nichrome wire terminals 35 so as to fuse the steel wire rope-reinforced polyethylene pipe 29 and the pipe connector 32. The fusion can provide sufficient resistance to external tensile force.
[00121 The magnetic particles 21 have a size ranging from several to several tens of millimeters. The shape can be rectangular bar-shaped, round bar-shaped, plate-shaped or the like. The magnetic particles 21 may be wrapped in clay or soluble paper. Alternatively, the magnetic particles 21 may form a longitudinal shape with the clay 22 sandwiched therebetween, and the resultant is wrapped in the soluble paper 23, thereby forming a bar. Iron particles having a spherical shape, round barshape, cube-shape or the like are used. Powdered iron may be mixed with pebbles, sand or the like and used. The powdered iron and sand or pebbles may be fed into the carrying pipe 6 from another feeding port other than the magnetic particles feeding equipment 12.
[00131 The circular mesh plate 8 has a structure in which it is suspended by a hanger bar 9 made of copper alloy or stainless steel. The conical metal mesh 11 is made of copper alloy or stainless steel. The conical metal mesh 11 is sized such that its outer circumference is contact with the inner circumference of the steel pipe 4. Instead of the conical metal mesh 11, a tea whisk-shaped metal obtained by finely splitting and flaring the top half of a thin-wall cylinder may be used.
[Industrial Applicability]
[0014] This method that uses magnetic particles can be widely used in the event of an emergency such as the pipe being damaged.
[Reference Signs List] [00151 1 Sea Surface 2 Seafloor 3 Seawater 4 Steel Pipe for Petroleum or Natural Gas Well Broken Point in Petroleum Well Steel Pipe 6 Carrying Pipe 7 Upper Opening of Carrying Pipe 8 Circular Mesh Plate 9 Hanger Bar of Circular Mesh Plate Fixing Bolt of Hanger Bar 11 Conical Metal Mesh 12 Feeding Equipment for Feeding Magnetic Particles or the Like 13 Rotary Disk 14 Housing Accommodating Magnetic Particles or the Like of Rotary Disk Magnetic Particle Composite Bar 16 Receiving Frame for Magnetic Particle Composite Bar 17 Axial Face of Rotary Disk 18 Motor for Driving Rotary Disk 19 Switching Valve for Pressurized Water 20 Gate Valve of Housing 21 Magnetic Particles 22 Clay 23 Soluble Wrapping Paper 24 Powdered Iron 25 Sand/Pebbles 26 Steel Balls 27 Mortar or Concrete 28 Base 29 Steel Wire Rope-Reinforced Polyethylene Pipe 30 Reinforcing Steel Wire Rope 31 Partition inside Polyethylene Pipe 32 Reinforced Polyethylene Pipe Connector 33 Reinforcing Metal Mesh 34 Nichrome Wire 35 Nichrome Wire Thrminal 36 Secondary Conduit
Claims (1)
- <claim-text>CLAIMS1. A method for blocking an outflow of petroleum or the like due to damage to a subsea petroleum well steel pipe or the Eke, the method comprising: when a steel pipe 4 for petroleum or natural gas well that has been installed in the sea is damaged, in order to send magnetic particles 21 or the like into the seafloor through an carrying pipe 6 that has been installed and suspended inside the steel pipe 4, blocldng an outflow of petroleum or the like coming from a lower portion of the carrying pipe 6 by a gate valve 20 provided at a lower portion of a feeding equipment 12 for feeding magnetic particles or the like attached to an upper opening 7 of the carrying pipe 6; after the outflow of petroleum or the like has been blocked, simultaneously opening a switching valve 19 provided at an upper portion of the feeding equipment 12 for feeding magnetic particles or the like and the gate valve 20, whereby pressurized water is injected into a housing 14 accommodating magnetic particles or the like and provided in a rotary disk 13 to sweep the magnetic particles 21 or the like in the housing 14 into the carrying pipe 6 and drop the magnetic particles 21 or the like to a lower end of the carrying pipe 6, and the magnetic particles 21 or the like move along the flow of petroleum or the like in the steel pipe 4, reach a conical metal mesh 11 attached to the carrying pipe 6, are blocked up by the conical metal mesh 11 and magnetically adhere to an inner surface of the steel pipe 4, and a resulting adherent layer gradually grows downward so that the magnetic particles 21 or the like reach a circular mesh plate 8 provided at a tip portion of the carrying pipe 6, fill inside of the steel pipe 4 and form a mass due to magnetic force, suppressing the outflow of petroleum or natural gas; and after the outflow of petroleum or natural gas has been suppressed, injecting mortar, concrete 27 or the like from the upper opening 7 of the carrying pipe 6 and curing the mortar, concrete 27 or the like.</claim-text> <claim-text>2. The method for blocking an outflow of petroleum or the like due to damage to a subsea petroleum well steel pipe or the like according to claim 1, comprising: providing a non-magnetic receiving frame 16 including several compartments in the housing 14 of the feeding equipment 12 for feeding magnetic particles or the like, placing the magnetic particles 21 in the compartments, and causing the magnetic particles 21 in the compartments to simultaneously flow into sections of the carrying pipe 6 by the pressurized water, the sections being formed by dividing the carrying pipe 6 into the same number as the compartments by a partition 31.</claim-text> <claim-text>3. The method for blocking an outflow of petroleum or the like due to damage to a subsea petroleum well steel pipe or the like according to claim 1 or 2,comprising in order to prevent the carrying pipe 6 from breaking at the same time when the steel pipe 4 is broken, using a steel wire rope-reinforced polyethylene carrying pipe 27 in which a plurality of flexible steel wire ropes 29 are circumferentially disposed and buried inside a wall of the polyethylene pipe and each extends in an axial direction thereof, and that is capable of sinking in the sea due to weight of the steel wire ropes 30, as the carrying pipe 6.</claim-text>
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/JP2011/068926 WO2012029588A1 (en) | 2010-09-02 | 2011-08-23 | Method for sealing off discharge of oil etc. caused by breakage of steel pipe etc. of undersea oil well |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| GB201122093D0 GB201122093D0 (en) | 2012-02-01 |
| GB2496460A true GB2496460A (en) | 2013-05-15 |
Family
ID=45572861
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1122093.6A Withdrawn GB2496460A (en) | 2011-08-23 | 2011-08-23 | Method for sealing off discharge of oil etc. caused by breakage of steel pipe etc. of undersea oil well |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB2496460A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE40845C (en) * | J. SINGER in München, Hildegardstr. 18/0 | Device for opening and closing hinged lids on drinking utensils | ||
| JPH04323492A (en) * | 1991-04-22 | 1992-11-12 | Sofutaade Kogyo Kk | Extinguishing method for fire of oil well |
| JP2002357074A (en) * | 2001-05-30 | 2002-12-13 | Shimizu Corp | Method for treating leaked oil from oil well |
-
2011
- 2011-08-23 GB GB1122093.6A patent/GB2496460A/en not_active Withdrawn
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE40845C (en) * | J. SINGER in München, Hildegardstr. 18/0 | Device for opening and closing hinged lids on drinking utensils | ||
| JPH04323492A (en) * | 1991-04-22 | 1992-11-12 | Sofutaade Kogyo Kk | Extinguishing method for fire of oil well |
| JP2002357074A (en) * | 2001-05-30 | 2002-12-13 | Shimizu Corp | Method for treating leaked oil from oil well |
Also Published As
| Publication number | Publication date |
|---|---|
| GB201122093D0 (en) | 2012-02-01 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| WAP | Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1) |