CN102124183A - Hydrocarbon production system, method for performing clean-up and method for controlling flow - Google Patents
Hydrocarbon production system, method for performing clean-up and method for controlling flow Download PDFInfo
- Publication number
- CN102124183A CN102124183A CN2009801296594A CN200980129659A CN102124183A CN 102124183 A CN102124183 A CN 102124183A CN 2009801296594 A CN2009801296594 A CN 2009801296594A CN 200980129659 A CN200980129659 A CN 200980129659A CN 102124183 A CN102124183 A CN 102124183A
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- Prior art keywords
- choke valve
- bypass duct
- valve
- lead
- fluid
- Prior art date
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- 238000004519 manufacturing process Methods 0.000 title claims description 39
- 238000000034 method Methods 0.000 title claims description 17
- 239000004215 Carbon black (E152) Substances 0.000 title claims description 11
- 229930195733 hydrocarbon Natural products 0.000 title claims description 11
- 150000002430 hydrocarbons Chemical class 0.000 title claims description 11
- 239000012530 fluid Substances 0.000 claims abstract description 45
- 239000003129 oil well Substances 0.000 claims description 19
- 241000191291 Abies alba Species 0.000 claims description 15
- 238000004140 cleaning Methods 0.000 claims description 6
- 230000006378 damage Effects 0.000 claims description 3
- 230000008569 process Effects 0.000 description 10
- 230000005540 biological transmission Effects 0.000 description 4
- 238000005553 drilling Methods 0.000 description 4
- 239000007789 gas Substances 0.000 description 4
- 238000009434 installation Methods 0.000 description 4
- 238000002347 injection Methods 0.000 description 3
- 239000007924 injection Substances 0.000 description 3
- 238000005520 cutting process Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000008676 import Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 239000004576 sand Substances 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- TVEXGJYMHHTVKP-UHFFFAOYSA-N 6-oxabicyclo[3.2.1]oct-3-en-7-one Chemical compound C1C2C(=O)OC1C=CC2 TVEXGJYMHHTVKP-UHFFFAOYSA-N 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 230000000246 remedial effect Effects 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Images
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
- 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
- E21B43/01—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
- E21B43/017—Production satellite stations, i.e. underwater installations comprising a plurality of satellite well heads connected to a central station
-
- 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
- Geology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- Physics & Mathematics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Pipeline Systems (AREA)
- Flow Control (AREA)
- Fluid-Pressure Circuits (AREA)
- Multiple-Way Valves (AREA)
- Cleaning In General (AREA)
- Cleaning By Liquid Or Steam (AREA)
Abstract
The present invention relates to a device for transmitting fluid from a subsea producing module (8) to a subsea receiving module (9) comprising a choke valve (3) in a main flowpath (7) of the fluid. A bypass line (2) is arranged in parallel to the choke valve (3) and the bypass line (2) is connected to the main flowpath (7) by a bypass connection (1).
Description
Technical field
The present invention relates to a kind of hydrocarbon production system, it comprises a bite sub-sea drilled wells, a subsea production module, a seabed receiver module and the fluid that is positioned at free oil well production to come out flow through the choke valve of main flow pipeline, and between this choke valve production module and the receiver module distance.
Background technology
On seabed installation, many mouthfuls of oil wells or christmas tree are connected on the common manifold.The pressure of these oil wells is different, and can transmit on an oil or natural gas to the common manifold, and the pressure that needs about equally.Therefore, choke valve is installed to adjust and controlled pressure between each christmas tree and manifold.
As the basis of debugging, this is that a standardization program is carried out a christmas tree scale removal process.Traditionally, cleaning work is carried out by choke valve.Removing thing can be the liquid of different viscositys, it also can comprise dissimilar and rubble size, as sand, and mud etc., the removing thing of this complexity comprises mudstone, the material risk that this mudstone brings fault and stops up choke valve to choke valve by this choke valve transmission the time.The preference that a kind of workman of oil recovery is arranged, perhaps in some cases or even requirement, the design of choke valve should be able to be handled this scale removal process.The mudstone of what type of there is no telling and much sizes on the other hand, do not have ready-made choke valve supplier maybe will guarantee, can tolerate such removing thing, because almost can flow through choke valve.Some choke valve has a kind of design, and for other choke valves, this design can prevent that mudstone from destroying the inner body of choke valve.But it still has the risk of stopping up the neat import and export in the choke valve.
Is different to the feature request of choke valve and production phase in later stage in christmas tree to the feature request of choke valve in phase I that oil/gas is produced.Owing to, need good controllability usually at this stage choke valve at the phase I high pressure of producing.At the later stage of producing, pressure can reduce, and the function that choke valve then needs to possess provides maximum stream flow.Existing good controllability and maximum stream flow are the required features of oil recovery workman, but almost can't buy such choke valve on current market.Therefore, a solution being arranged is the choke valve that has good controllability with the different choke valves replacements that maximum stream flow is provided during the late stages of developmet.This replacement process is the process of a complexity, relates to the use as a kind of straighforward operation vehicle (ROV), and it also needs closing machine to install in the replacing process.
It is reported that the patent No. is that WO2006/041820 has described the waste management device that uses in operating pressure and the drilling operation course.In this device, one of them is the pressure that is used for the system that keeps for two choke valves.Because what flow out from the drilling well the inside is mud, has comprised a large amount of drilling cuttings in the mud.These drilling cuttings will pass choke valve.As mentioned above, the neither one choke valve can be handled the mudstone of so many quantity and not be damaged on today market, unless fluid pressure and flow are very low.Compare with hydrocarbon fluids, the mud that comes outbreak out generally has low-down pressure and flow.
The patent No. is that WO2006/041820 has described shunt conduit, can not be at contingency mud by under the situation of two choke valves, and this shunt conduit can be shunted the mud that comes outbreak out from two choke valves.Yet, in the sea-bottom oil-gas production system, do not consider to use the patent No. 2006/041820 described technology, because flow and pressure are very high usually in this hydrocarbon production system.
Summary of the invention
Therefore, be necessary to provide a solution to flow through the remedial measure that this choke valve causes stopping up the problem of choke valve about the above-mentioned fluid that contains mudstone to provide a kind of, and in seabed installation the different product stage need different functions.
The objective of the invention is to obtain in the accessory rights requirement 1 defined content.
Embodiments of the invention are by obtaining in the defined feature in the attached dependent claims.
The objective of the invention is to be achieved: a kind of hydrocarbon production system by the following technical scheme that provides, it comprises submarine oil production module, submarine oil receiver module and main flow pipeline, this submarine oil production module is operably connected to sub-sea drilled wells, this main flow pipeline comprises the submarine oil production choke valve that is communicated to submarine oil production module and submarine oil receiver module glibly, wherein bypass duct is set to be arranged in parallel with choke valve and is provided with and is connected to this main flow pipeline by a bypass connector, so that the fluid of producing flows around choke valve.
This can prevent the obstruction of choke valve and produce fault, and therefore, if fluid is to transmit by the choke valve transmission rather than by bypass duct, this choke valve breaks down replacing easily and changes this choke valve.It has also eliminated the problem according to fluid flow and production phase replacing choke valve.
In one embodiment, this bypass connector comprises that at least one can opening and closing main flow pipeline leads to the valve of this bypass duct.This is a simple embodiment, and in this embodiment, this main flow pipeline opens wide all the time, and this bypass duct can close or open.This fluid flows in the simplest mode, and when this bypass duct was conducting, this fluid was by this bypass duct.
In another embodiment, this valve is the two-port valve door, this two-port valve door have lead to this choke valve after opening and close after lead to the primary importance of this bypass duct, and lead to this bypass duct after opening and close the second place of leading to this choke valve.When this bypass duct was opened, this will close the pipeline that leads to this choke valve, thereby eliminates the risk that any mud-rock flow is crossed this choke valve.
In yet another embodiment, this valve is a three-way valve, this three-way valve have lead to this choke valve after opening and close after lead to the primary importance of this bypass duct, lead to this bypass duct after opening and close the second place of leading to this choke valve and close after not only lead to this choke valve but also lead to the 3rd position of this bypass duct.Present embodiment can be opened this choke valve and bypass duct simultaneously.In this enforcement, in the time will keeping in repair, can use this valve closing oil well to the equipment of this valve downstream.
In yet another embodiment, this valve is a four way valve, this four way valve have lead to this choke valve after opening and close after lead to the primary importance of this bypass duct, lead to this bypass duct after opening and close the second place of leading to this choke valve, not only lead to this choke valve but also lead to the 3rd position of this bypass duct after closing, and the 4th position of leading to choke valve and bypass duct after opening simultaneously.Thereby increased than independent flow by bypass duct because choke valve can be set to a wide-open position, this may be a kind of advantage.
In a preferred embodiment, this bypass duct is connected on the main flow pipeline by two connectors, and one of them connector is positioned at any side of this choke valve.When oil gas product passes through this bypass duct, can take away choke valve.
According to a first aspect of the invention, in a preferred embodiment of this device, this receiver module is a manifold.A plurality of oil wells can be added to same manifold.
According to a first aspect of the invention, in another preferred embodiment of this device, this submarine oil production module is a christmas tree.
According to a first aspect of the invention, in another preferred embodiment of this device, this bypass connector is set for the both direction transmitting fluid at this bypass duct, thereby not only provides the production fluid but also provide the injection fluid.Thereby about reverse fluid flow restriction choke valve no longer has been a problem.
According to a first aspect of the invention, in another embodiment of this equipment, contain mudstone in this fluid.
According to a second aspect of the invention, a kind of method that in hydrocarbon production system, is used to carry out cleaning sub-sea drilled wells and submarine oil production module, this submarine oil production module is used to produce the fluid by main pipeline, this main pipeline comprises choke valve, wherein, between clear-up period, the bypass duct the bypass connector directly leads the fluid of the fluid produced and/or processing this choke valve in the back that is opened from oil well around is in case the mudstone in the fluid stopping body damages or blocks this choke valve.
Produce the fluid that will clear up in this production module between clear-up period, this fluid contains mudstone, and this fluid is by the main flow pipeline transmission.This bypass connector guides this fluid that will clear up by indicating the bypass duct that is arranged in parallel and is provided with choke valve by, stops up with the mudstone of avoiding choke valve to break down and to contain owing to fluid.
According to a third aspect of the invention we, it relates to a kind of method of controlling flow in hydrocarbon production system, it comprises the submarine oil production module that is operably connected to sub-sea drilled wells, submarine oil receiver module and the main flow pipeline that comprises submarine oil production choke valve, this submarine oil is produced choke valve and is unimpededly connected this production module and this receiver module, wherein, be higher than in oil well pressure under the situation of the necessary pressure of producing required flow velocity, operate this choke valve so that flow restriction is arrived required flow velocity, and when flow velocity is under the situation of desired flow rates, this flow velocity corresponds essentially to the flow velocity of the maximum of oil well, opens the outside of bypass duct with this choke valve of direct fluid.As time goes on, the pressure in oil well drops to certain level, and people might only open bypass duct.This also removes to change a choke valve with regard to there is no need with the choke valve of another different performance, i.e. restriction has reduced.Under the situation of the flow that there is no need to limit oil well, this also makes people to open choke valve for the total pressure in the oil well, for example, if closed the oil well that another mouthful that is connected on the same manifold has low-pressure, then can allow current oil well not disturb other oil wells to produce to greatest extent.
Description of drawings
Below with reference to drawings and Examples the present invention is illustrated in greater detail.
Fig. 1 is a schematic diagram of the present invention.
The specific embodiment
See also Fig. 1, pipeline 7 one ends are connected to christmas tree and sub-sea drilled wells (representing with numerical chracter 8 usually), and the other end of pipeline 7 is connected on the manifold 9.Control is connected between the two-end-point 8,9 of this pipeline 7 by the choke valve 3 of the fluid of 7 li in pipeline.Only, also shown typical structure square among Fig. 1 for explanation.This square can be a flow meter 4, sand grains sensor 5 and pressure piping 6.Pressure and temperature sensor PP, PT also is arranged in the pipeline 7.The system that shows in Fig. 1 is among normal operation.The fluid that flows out from sub-sea drilled wells flow in the manifold 9 by choke valve 3 from christmas tree 8.In the scale removal process of sub-sea drilled wells or christmas tree 8, the mudstone of this choke valve 3 in can not the safe handling fluid.Therefore, bypass duct 2 is parallel to prevent that choke valve 3 from avoiding the destruction of mudstone as an extra pipeline 2 and choke valve 3.Bypass duct 2 is connected on the pipeline 7 by bypass connector 1.This bypass connector 1 has a kind of control function, and according to performed operating process, this control function is that direct fluid enters bypass duct 2 or passes through choke valve 3.In scale removal process, the oil gas product that often contains the processing of mudstone flow through bypass duct 2 rather than choke valve 3 (as prior art), promptly mudstone can not contact choke valve 3 in scale removal process, and this system adopts the mode more safer than known systems can realize the cleaning of oil well by christmas tree.In this, choke valve 3 can not destroyed, and therefore, this has just been avoided changing and repairing the complicated and expensive like this process of damaging of choke valve 3.The material of this bypass duct 2 and pipeline 7 is normally identical, and perhaps this bypass duct 2 is one-body molded with the contiguous block that christmas tree 8 is bridged to manifold 9.This bypass duct 2 preferably is installed on the seabed installation and installs other elements as this simultaneously.
Except using bypass duct 2 transmission cleaning products, this bypass duct 2 has a kind of special function with campaign of two-forty.In sub-sea drilled wells, campaign can height can be low.In the campaign of two-forty is best, and in this campaign, the flow that provides is as far as possible with at the fluid of 7 li in pipeline as many.There is not bypass duct 2, the fluid choke valve 3 of will flowing through, this will make choke valve 3 stand big pressure drop and can not provide maximum stream flow.Even this situation of this full trrottle also can take place.By allowing fluid flow through this bypass duct 2 in campaign at a high speed, the pressure drop of this bypass duct 2 is very little than choke valve 3, thereby maximum stream flow can be provided.Therefore, can improve tar productivity in the campaign of two-forty.
Simultaneously, this bypass duct 2 also provides the good controllability of choke valve 3 in the phase I, because it provides maximum stream flow in the production phase of later stage oil well, the choke valve 3 that does not need to have difference in functionality with another kind is replaced existing choke valve 3.This bypass duct 2 provides a pressure drop that can not be ignored for choke valve 3, and therefore, christmas tree can have than operating under the higher speed of production of designed choke valve 3.
The another kind of function of this bypass duct 2 is that it can be provided in transmitting fluid on the both direction, spreads out of to come or import christmas tree into from christmas tree.In this way, same christmas tree can be used for producing and injecting.Fluid has many restrictions by choke valve 3 reverse flows (injection), and needs higher injection pressure to overcome in the pressure drop of choke valve place, and still, by using bypass duct 3, these restrictions will no longer be problems.
In a word, by the bypass duct 2 that walks abreast with choke valve 3 is provided, the present invention can save the cost that increases tar productivity, and the operation of installation cost and any reinstalling/workover may reduce.The fragility of choke valve 3 and fault danger have significantly reduced between clear-up period.
Claims (12)
1. hydrocarbon production system comprises:
Submarine oil production module (8), this submarine oil production module is operably connected to sub-sea drilled wells;
Submarine oil receiver module (9), and
Main flow pipeline (7), this main flow pipeline comprises submarine oil production choke valve (3), this choke valve unimpededly is connected to this production module and this receiver module, it is characterized in that bypass duct (2) is arranged in parallel to be provided with and to be connected to main flow pipeline (7) by bypass connector (1) with choke valve (3) and goes up to derive the fluid of producing around this choke valve.
2. system according to claim 1 is characterized in that, this bypass connector comprises that at least one can opening and closing main flow pipeline leads to the valve of this bypass duct.
3. system according to claim 2, it is characterized in that, this valve is the two-port valve door, this two-port valve door have lead to this choke valve after opening and close after lead to the primary importance of this bypass duct, and lead to this bypass duct after opening and close the second place of leading to this choke valve.
4. system according to claim 2, it is characterized in that, this valve is a three-way valve, this three-way valve have lead to this choke valve after opening and close after lead to the primary importance of this bypass duct, lead to this bypass duct after opening and close the second place of leading to this choke valve and close after not only lead to this choke valve but also lead to the 3rd position of this bypass duct.
5. system according to claim 2, it is characterized in that, this valve is a four way valve, this four way valve have lead to this choke valve after opening and close after lead to the primary importance of this bypass duct, lead to this bypass duct after opening and close the second place of leading to this choke valve, not only lead to this choke valve but also lead to the 3rd position of this bypass duct after closing, and the 4th position of leading to choke valve and bypass duct after opening simultaneously.
6. any described system in requiring according to aforesaid right is characterized in that this bypass duct is connected on the main flow pipeline by two connectors, and one of them connector is positioned at any side of this choke valve.
7. any described system in requiring according to aforesaid right is characterized in that this receiver module is a manifold.
8. any described system in requiring according to aforesaid right is characterized in that this submarine oil production module is a christmas tree.
9. any described system in requiring according to aforesaid right is characterized in that this bypass connector (1) is set for the both direction transmitting fluid at this bypass duct (2), thereby has not only made a living runoff yield body but also provide the fluid passage for injecting fluid.
10. any described system in requiring according to aforesaid right is characterized in that, contains mudstone in this fluid.
11. method that in hydrocarbon production system, is used for carrying out cleaning sub-sea drilled wells and submarine oil production module (8), this submarine oil production module (8) is used for producing the fluid by main pipeline (7), this main pipeline (7) comprises choke valve (3), it is characterized in that, between clear-up period, the bypass duct bypass connector directly leads the fluid of the fluid produced and/or processing this choke valve in the back that is opened from oil well around is in case the mudstone in the fluid stopping body damages or blocks this choke valve.
12. the method for a control flow in hydrocarbon production system, it comprises the submarine oil production module (8) that is operably connected to sub-sea drilled wells, submarine oil receiver module (9) and comprise that submarine oil produces the main flow pipeline (7) of choke valve (3), this submarine oil is produced choke valve (3) and is unimpededly connected this production module and this receiver module, it is characterized in that, be higher than in oil well pressure under the situation of the necessary pressure of producing required flow velocity, operate this choke valve so that flow restriction is arrived required flow velocity, and when flow velocity is under the situation of desired flow rates, this flow velocity corresponds essentially to the flow velocity of the maximum of oil well, opens the outside of bypass duct with this choke valve of direct fluid.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NO20083451A NO330025B1 (en) | 2008-08-07 | 2008-08-07 | Underwater production plant, method for cleaning an underwater well and method for controlling flow in a hydrocarbon production system |
| NO20083451 | 2008-08-07 | ||
| PCT/NO2009/000278 WO2010016770A2 (en) | 2008-08-07 | 2009-08-07 | Hydrocarbon production system, method for performing clean-up and method for controlling flow |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102124183A true CN102124183A (en) | 2011-07-13 |
Family
ID=41508116
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009801296594A Pending CN102124183A (en) | 2008-08-07 | 2009-08-07 | Hydrocarbon production system, method for performing clean-up and method for controlling flow |
Country Status (7)
| Country | Link |
|---|---|
| US (1) | US20110139460A1 (en) |
| CN (1) | CN102124183A (en) |
| AU (1) | AU2009280158A1 (en) |
| BR (1) | BRPI0917474A2 (en) |
| GB (1) | GB2474977B (en) |
| NO (1) | NO330025B1 (en) |
| WO (1) | WO2010016770A2 (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9169709B2 (en) * | 2012-11-01 | 2015-10-27 | Onesubsea Ip Uk Limited | Spool module |
| US9133690B1 (en) * | 2014-09-09 | 2015-09-15 | Chevron U.S.A. Inc. | System and method for mitigating pressure drop at subsea pump startup |
| US10533395B2 (en) * | 2016-01-26 | 2020-01-14 | Onesubsea Ip Uk Limited | Production assembly with integrated flow meter |
| US11346205B2 (en) * | 2016-12-02 | 2022-05-31 | Onesubsea Ip Uk Limited | Load and vibration monitoring on a flowline jumper |
| GB201621984D0 (en) * | 2016-12-22 | 2017-02-08 | Statoil Petroleum As | Flow control apparatus |
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- 2008-08-07 NO NO20083451A patent/NO330025B1/en not_active IP Right Cessation
-
2009
- 2009-08-07 CN CN2009801296594A patent/CN102124183A/en active Pending
- 2009-08-07 BR BRPI0917474A patent/BRPI0917474A2/en not_active IP Right Cessation
- 2009-08-07 US US13/003,795 patent/US20110139460A1/en not_active Abandoned
- 2009-08-07 GB GB1022112.5A patent/GB2474977B/en not_active Expired - Fee Related
- 2009-08-07 AU AU2009280158A patent/AU2009280158A1/en not_active Abandoned
- 2009-08-07 WO PCT/NO2009/000278 patent/WO2010016770A2/en active Application Filing
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| US3050125A (en) * | 1960-05-27 | 1962-08-21 | Shell Oil Co | Apparatus for producing high pressure wells |
| CN1632369A (en) * | 2004-12-27 | 2005-06-29 | 西安交通大学 | Separator and phase-split conveying method for eliminating plug flow on serious segments by utilizing same |
| US20080000529A1 (en) * | 2006-05-20 | 2008-01-03 | Lawrence Edwards Jeremy P | Pipeline protection system |
| US20080029269A1 (en) * | 2006-05-24 | 2008-02-07 | Martin Thomas B Jr | Method and system for installing equipment for production and injection operations |
| US20080135258A1 (en) * | 2006-12-06 | 2008-06-12 | Chevron U.S.A. Inc. | Method for Preventing Overpressure |
| WO2008070643A2 (en) * | 2006-12-06 | 2008-06-12 | Chevron U.S.A. Inc. | Overpressure protection device |
Also Published As
| Publication number | Publication date |
|---|---|
| BRPI0917474A2 (en) | 2015-12-01 |
| NO330025B1 (en) | 2011-02-07 |
| WO2010016770A3 (en) | 2010-04-01 |
| NO20083451L (en) | 2010-02-08 |
| WO2010016770A2 (en) | 2010-02-11 |
| AU2009280158A1 (en) | 2010-02-11 |
| GB201022112D0 (en) | 2011-02-02 |
| GB2474977A (en) | 2011-05-04 |
| US20110139460A1 (en) | 2011-06-16 |
| GB2474977B (en) | 2012-12-05 |
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Application publication date: 20110713 |