GB2451170A - Method of cleaning a crude oil separator vessel. - Google Patents
Method of cleaning a crude oil separator vessel. Download PDFInfo
- Publication number
- GB2451170A GB2451170A GB0812879A GB0812879A GB2451170A GB 2451170 A GB2451170 A GB 2451170A GB 0812879 A GB0812879 A GB 0812879A GB 0812879 A GB0812879 A GB 0812879A GB 2451170 A GB2451170 A GB 2451170A
- Authority
- GB
- United Kingdom
- Prior art keywords
- vessel
- separator
- foaming agent
- chemical
- solvent
- 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- Withdrawn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
- 238000000034 method Methods 0.000 title claims abstract description 54
- 238000004140 cleaning Methods 0.000 title claims abstract description 25
- 239000010779 crude oil Substances 0.000 title claims description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 31
- 239000004088 foaming agent Substances 0.000 claims abstract description 28
- 239000010802 sludge Substances 0.000 claims abstract description 22
- 239000000126 substance Substances 0.000 claims abstract description 22
- 238000011010 flushing procedure Methods 0.000 claims abstract description 19
- 239000002904 solvent Substances 0.000 claims abstract description 19
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 18
- 229930195733 hydrocarbon Natural products 0.000 claims abstract description 17
- 150000002430 hydrocarbons Chemical class 0.000 claims abstract description 17
- 239000012530 fluid Substances 0.000 claims abstract description 10
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 claims abstract description 9
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 9
- 238000009423 ventilation Methods 0.000 claims abstract description 7
- 239000002253 acid Substances 0.000 claims abstract description 5
- 150000001412 amines Chemical class 0.000 claims abstract description 5
- 239000003921 oil Substances 0.000 claims description 27
- 239000000203 mixture Substances 0.000 claims description 13
- 239000004215 Carbon black (E152) Substances 0.000 claims description 7
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 claims description 6
- 239000007788 liquid Substances 0.000 claims description 3
- SYELZBGXAIXKHU-UHFFFAOYSA-N dodecyldimethylamine N-oxide Chemical group CCCCCCCCCCCC[N+](C)(C)[O-] SYELZBGXAIXKHU-UHFFFAOYSA-N 0.000 claims description 2
- 239000011236 particulate material Substances 0.000 claims description 2
- FGUUSXIOTUKUDN-IBGZPJMESA-N C1(=CC=CC=C1)N1C2=C(NC([C@H](C1)NC=1OC(=NN=1)C1=CC=CC=C1)=O)C=CC=C2 Chemical compound C1(=CC=CC=C1)N1C2=C(NC([C@H](C1)NC=1OC(=NN=1)C1=CC=CC=C1)=O)C=CC=C2 FGUUSXIOTUKUDN-IBGZPJMESA-N 0.000 claims 1
- 238000001816 cooling Methods 0.000 claims 1
- MTHSVFCYNBDYFN-UHFFFAOYSA-N diethylene glycol Chemical compound OCCOCCO MTHSVFCYNBDYFN-UHFFFAOYSA-N 0.000 abstract description 2
- 239000007789 gas Substances 0.000 description 8
- 239000002245 particle Substances 0.000 description 5
- 239000000839 emulsion Substances 0.000 description 4
- 238000007689 inspection Methods 0.000 description 4
- 239000007787 solid Substances 0.000 description 4
- 238000004891 communication Methods 0.000 description 2
- 238000005237 degreasing agent Methods 0.000 description 2
- 239000013527 degreasing agent Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000005192 partition Methods 0.000 description 2
- 239000002351 wastewater Substances 0.000 description 2
- OAYXUHPQHDHDDZ-UHFFFAOYSA-N 2-(2-butoxyethoxy)ethanol Chemical compound CCCCOCCOCCO OAYXUHPQHDHDDZ-UHFFFAOYSA-N 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000005574 cross-species transmission Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000012432 intermediate storage Methods 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 239000012071 phase Substances 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000029058 respiratory gaseous exchange Effects 0.000 description 1
- 230000000284 resting effect Effects 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000004381 surface treatment Methods 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B9/00—Cleaning hollow articles by methods or apparatus specially adapted thereto
- B08B9/08—Cleaning containers, e.g. tanks
- B08B9/093—Cleaning containers, e.g. tanks by the force of jets or sprays
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B9/00—Cleaning hollow articles by methods or apparatus specially adapted thereto
- B08B9/08—Cleaning containers, e.g. tanks
- B08B9/093—Cleaning containers, e.g. tanks by the force of jets or sprays
- B08B9/0933—Removing sludge or the like from tank bottoms
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B2230/00—Other cleaning aspects applicable to all B08B range
- B08B2230/01—Cleaning with steam
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Production Of Liquid Hydrocarbon Mixture For Refining Petroleum (AREA)
- Cleaning In General (AREA)
Abstract
The present invention concerns a method of cleaning a vessel 3 structured so as to be able to separate hydrocarbons from oil sludge, wherein the method comprises the steps of: introducing steam into the vessel 3; opening to ventilation of the vessel 3; introducing a chemical into the vessel 3; opening to drainage of sludge from the vessel 3; continuing supplying steam and chemical for a period and then stopping said supply; and flushing the vessel 3 by means of a fluid, which could be water. The chemical may be a foaming agent such as an amine oxide and a solvent such as glycol ether and could include an acid such as citric acid. A solvent and foaming agent may also be supplied to the vessel prior to the steam. Nitrogen may also be supplied to the vessel. The invention also comprises a method for reducing, during normal operation, build-up of oil sludge in the vessel 3.
Description
A METHOD OF CLEANING A VESSEL
The present invention concerns internal cleaning of a vessel.
More particularly, it concerns cleaning of, for example, a separator of the type used in the petroleum industry for s separating hydrocarbons from so-called produced water.
In the separator, hydrocarbons in gas phase are separated from hydrocarbons in liquid phase, which hereinafter is referred to as gas and oil, respectively, for the sake of simplicity.
In the separation process, large amounts of oil sludge will settle in the bottom portion of the separator. Over time, this may cause a layer of emulsion, which among other things consists of a mixture of hydrocarbons and water, to be carried into the hydrocarbons or the oil, whereby the content of water in the separated oil may become undesirably high.
Moreover, requirements exist for the separator to be inspected regularly with respect to potential damages.
Therefore, a need exists for cleaning the separator carefully enough to allow inspection to be carried out without requiring further cleaning.
P2542308DE The object of the present invention is to provide a method of cleaning a separator or some other vessel arranged for intermediate storage of oil, the method being faster and environmentally more friendly than that of existing methods.
s For a long time, and still prevailing to a certain extent, a common method of cleaning separators has been to flush the separators internally by means of water, after which steam is supplied thereto. Cleaning personnel wearing breathing apparatuses and other protective equipment may then enter the io vessel in order to clean the separator further by means of jet water washing. The oil sludge recovered from the separator must be forwarded to approved receiving stationa onshore for further handling. Thereafter the separator is ventilated, and personnel may first enter into the vessel when the concentration of hydrocarbon gases is sufficiently low. Oftentimes, however, the concentration of hydrocarbon gases may increase again after some time, requiring the personnel to temporarily evacuate the vessel while further ventilation is carried out.
A method of cleaning oil containers is known from american publication US 2.045.752. In this known method, steam and water is used and is supplied under high pressure in order to remove the contaminations.
The method is time-consuming given that the vessel may be entered by inspection personnel first after 3 to 7 days.
Previously, the present applicant has developed a method that is faster than the aforementioned, traditional method. The method is based on filling approximately one third of the separator with water prior to supplying a degreasing agent to the separator. Then, the separator is supplied with steam for 16-20 hours through steam valves, possibly through its P25423GB138 flushing water system, in order to obtain a sufficiently high temperature to be able to dissolve the oil sludge. Then, the emulsified sludge is drained from the separator. After having drained the separator, it is flushed with water in order to remove the remaining emulsion. After this event, the separator may be entered by inspection personnel.
Even though the aforementioned method developed by the present applicant has proven far more efficient than traditional methods, it is relatively time-consuming and requires relatively large amounts of water and steam. Having completed the cleaning process, a separator, which typically has a fluid volume of 200-400 &, will be almost filled with waste water containing chemicals and some hydrocarbons.
Normally, this waste water may be discharged into the sea, but oftentimes it is forwarded to onshore receiving stations for cleaning.
The object of the invention is to remedy or to reduce at
least one of the disadvantages of the prior art.
The object is achieved by virtue of the features disclosed in the following description and in the subsequent claims.
In a first aspect of the present invention, a method of cleaning a vessel is provided, the vessel being arranged so as to be able to separate some of those components contained in crude oil recovered from a hydrocarbon-producing well, wherein the method comprises the steps of: a) introducing steam into the vessel; b) opening to ventilation of the vessel; C) introducing further a chemical into the vessel; d) opening to drainage of sludge from the vessel; e) continuing the supply of steam and chemical for a period and then stopping the supply of steam and the chemical P2SI23GBDE to the vessel; and f) flushing the vessel by means of a fluid.
In a preferred embodiment, steam is introduced into the vessel via a steam manifold and through those steam flushing s lines provided to a vessel structured so as to be able to separate various components in a production flow from a well.
Preferably, the chemical is comprised of a foaming agent and a solvent. In a preferred embodiment, the chemical also contains an acid. As an example, but not restricted thereto, the acid may be citric acid.
Hereinafter, the vessel will also be referred to as a separator.
Preferably, and additional to being able to receive steam, the steam manifold is provided with couplings for chemicals, water and gases, whereby they may be supplied individually or in any desirable combination from the steam manifold and to the separator.
In cases where the crude oil or the "crude", which is supplied to the vessel or the separator, contains a relatively large proportion of solid particles, it has surprisingly proven very efficient to supply to the oil sludge a mixture of a solvent and a foaming agent prior to introducing steam into the separator, as stated in step a above.
Preferably, the mixture of solvent and foaming agent is introduced into the separator via an inlet portion disposed in a top portion of the separator.
In a preferred embodiment, the solvent is comprised of glycol ether, preferably of the highly efficient butyl diglycol P25123G2D8.
ether (BDGE).
In a preferred embodiment, the foaming agent is comprised of amine oxide. Preferably, the amine oxide is dimethyl dodecyl amine oxide.
The mixing ratio between the solvent and the foaming agent is selected according to the type of deposits present in the separator. In one embodiment, the mixture is supplied at a ratio of 1:1, but in alternative embodiments the mixture may be supplied at a ratio of, for example, 90 % solvent and 10 % foaming agent, or at a ratio of, for example, 90 % foaming agent and 10 % solvent. The mixture ratio refers to percentages by volume.
In a second aspect of the present invention, an alternative method of cleaning a vessel is provided. More precisely, a i method for at least reducing build-up of oil sludge in a separator j8 provided, the separator being arranged so as to be able to separate some of those components contained in crude oil recovered from a hydrocarbon-producing well. The method comprises a step of supplying to the flushing water, which is used in connection with a water-flushing operation of the separator, a chemical arranged so as to be able to dissolve the oil sludge, wherein the flushing water with the added chemical is supplied through a flushing water system of the separator.
Preferably, the chemical is comprised of a mixture of a foaming agent and a solvent. The foaming agent and the solvent may be of the type mentioned in connection with the first aspect of the invention.
The alternative method according to the second aspect of the invention offers the possibility of considerably reducing the frequency of required maintenance intermissions in order to P2SI23GRDE remove oil sludge from the separator.
Hereinafter, an example of a preferred embodiment is described and is depicted on the accompanying drawing, where: Fig. 1 shows a principle sketch of a separator connected to a steam manifold.
In the figure, the reference numeral 1 denotes a separator comprised of a vessel 3, the bottom portion of which is divided into a first compartment 5 and a second compartment 7. The compartments 5, 7 are separated by means of a partition wall 9 extending a distance upwards from the bottom portion of the vessel 3.
Via a first supply line 5', the first compartment 5 is in fluid communication with a steam manifold 13. In the embodiment shown, the first compartment 5 is also provided is with a flushing water system 11 of a type known per se. The flushing water system 11 is connected to a water supply (not shown) by means of a connection line 11'.
A second supply line 7' provides fluid communication between the steam manifold 13 and the second compartment 7 of the vessel 3.
Supply of fluid from the steam manifold 13 to the first compartment 5 and the second compartment 7 may be controlled by means of valves 15, 17 disposed in the first supply line 5' and the second supply line 7', respectively.
During normal operation, the first compartment 5 of the separator 1 is supplied crude or crude oil through an inlet 19. Due to dissimilar specific gravities of particles, water and oil which the crude oil may contain, they will appear resting in layers in the first compartment 5 of the separator P23423G8DE 1, having oil as the uppermost layer. it is also possible for an emulsion layer to form, comprising substantially a water-oil-mixture.
As the first compartment 5 is filled, layers of particles, s water and oil will form. Having filled the first compartment to a top portion of the partition wall 9, the oil floating at the top will spill over into the second compartment 7.
Water and particles are drained from the first compartment 5 via a water drainage outlet 21, whereas separated oil in the io second compartment 7 is drained via an oil drainage outlet 23. Both drainage outlets 21, 23 may be controlled by means of valve devices.
Hydrocarbons in a gaseous state are removed from the vessel 3 through a gas outlet 24.
is Furthermore, the separator 1 is connected to a ventilation line 25. The ventilation line 25 is provided with a valve 27.
If solids in the oil sludge are not drained together with the water, an increasingly thicker layer of solids will form.
Eventually, this will cause the emulsion to be carried over into the second compartment 7. This may thus cause the oil being drained from the second compartment 7 to have an undesirable high content of water.
In order to avoid such situations, a separator must therefore be cleaned regularly. In connection with cleaning, it is common to simultaneously inspect the separator internally in order to detect potential defects or deficiencies.
When the separator 1 is to be cleaned by means of the method according to the present invention, steam from the steam manifold 13 is introduced into the vessel 3 via at least one P2542308DR of the supply lines 5', 7'. Steam Is supplied to the steam manifold 13 via a steam supply line 29 connected to a steam generator (not shown).
In connection with introducing steam into the vessel 3, the s valve 27 is opened for ventilation of the vessel 3 in order to avoid an undesirable pressure build-up in the vessel 3, among other things.
A foaming agent is introduced into the steam manifold 13 from a container 33 by means of a chemical injection line 35 and a io pump device 37. The foaming agent is conveyed from the steam manifold 13 and into the vessel 3.
The foaming agent may also include a degreasing agent.
After some time, for example, but not limited to, two hours of cleaning by means of the foaming agent, the vessel 3 i.e drained by opening the drainage outlets 21, 23. The sludge, now dissolved by means of at least steam, will thus be drained out of the separator 1. The oil, now separated from the sludge, will be carried substantially by the foaming agent and is drained out together with it.
In those situations where a separator is provided with a flushing water system 11, flushing water advantageously is supplied for a few minutes, for example three to five minutes, prior to opening the drainages 21, 23.
Raving opened the drainages 21, 23, the supply of steam and foaming agent continues for a period of, for example, eight hours. It is to be understood that the period may be shorter or longer than said eight hours.
Finally; the separator 1 is flushed internally by means of a fluid, for example water. The fluid is supplied to the P254230BDE manifold 13 through a fluid supply line 39, the purpose of which is both to remove remaining chemicals and to cool the separator 1. Typically, the flushing goes on for Ca. thirty minutes, but it may have a shorter or longer duration.
Should there be a risk of the separator 1 becoming overheated, for example by virtue of a potential internal surface treatment being damaged by the hot steam supplied during the cleaning process, nitrogen may be supplied from the steam manifold 13, for example together with the steam and the foaming agent. Nitrogen may be supplied to the steam manifold 13 from a nitrogen tank (not shown) through a nitrogen supply line 41. If nitrogen is present in a liquid state at the place of use, this is preferable, but nitrogen in a gaseous state may also be used.
In situations where the crude oil being supplied to the separator 1 contains relatively large amounts of aolid particles, the cleaning of the separator may be made even more efficient by initially introducing into the separator 1, for example prior to introducing steam into the separator 1, 2D a mixture of a solvent and a foaming agent in order to dissolve, among other things, deposits of particulate material from the bottom portion of the separator 1. Via a line 45 extending between chemical container 47 and the top portion of the vessel 3, the mixture of the solvent and the foaming agent is pumped into the separator 1 by means of a pump 44.
Full-scale tests have shown that it is poasible to carry out a complete cleaning of a separator by means of the method according to the present invention during less than ten hours, which is very much faster than that of cleaning by means of either traditional methods, which require three to seven days, or that of the method developed by the applicant P23423G8DE of the present invention, the method of which requires a cleaning time of thirty to forty hours.
After cleaning in accordance with the method of the present invention, the vessel is clean and free of harmful gases to the extent that inspection personnel may start their work without interruptions caused by formation of hydrocarbon gases.
The method according to the present invention is also very environmentally friendly relative to prior art methods.
io The oil in the sludge is recovered, and estimates have shown that the amount of waste is reduced by more than 90 % compared to that hitherto achievable by means of prior art methods. The reason for this is that separated oil, which is drained out of the separator 1 by means of the foaming agent, may be re-introduced into the production flow and be recovered. The solids in the sludge, which is drained out of the separator, are substantially comprised of clean sand and so-called "scale", which are normally permitted to be dumped into the ocean.
o Supplying a foaming agent and simultaneously draining the vessel haa the effect of the hydrocarbons being recovered from the separator in a liquid state rather than in a gaseous state. Estimates show that discharges of hydrocarbons in a gaseous state are reduced by approximately 90 %.
P25423G8DE 1].
Claims (16)
- Claims 1. A method of cleaning a vessel (3) structured so as to be able to separate some of those components contained in crude oil recovered from a hydrocarbon-producing well, c h a r a c t e r i z e d I n that the method comprises the steps of: a) introducing steam into the vessel (3); b) opening to ventilation of the vessel (3); c) introducing a chemical into the vessel (3); d) opening to drainage of sludge from the vessel (3); e) continuing supplying steam and chemical for a period and then stopping said supply; and f) flushing the vessel (3) by means of a fluid.is
- 2. The method according to claim 1, c h a r a c t e r I z e d i n using a foaming agent and a solvent as the óhemical.
- 3. The method according to claim 2, c h a r a c t e r i z e d i n that the chemical further includes an acid.
- 4. The method according to claim 3, c h a r a c t e r i z e d i n using citric acid as the acid.
- 5. The method according to any preceding claim,J c h a r a c t e r i z e d I n that the method further comprises, prior to step a, a step of supplying to the oil sludge a mixture of at least a solvent and a foaming agent in order to dissolve deposits of particulate material from the bottom portion of the vessel (3).P23423G90E
- 6. The method according to claim 5, characterized in that themixture is composed solely of the solvent and the foaming agent, the mixture comprising any mixing ratio between the solvent s and the foaming agent.
- 7 The method according to any preceding claim, characterized in flushing, in step f, the vessel (3) by means of water.
- B. The method according to any preceding claim, c h a r a c t e r 1. z e d i n that the method further comprises introducing nitrogen into the vessel (3) in order to provide cooling, nitrogen in a liquid state or a gaseous state being supplied after step d.
- 9. The method according to claim 5, c ii a r a c t e r i z e d i n using g].ycol ether as the solvent, prior to step a.
- 10. The method according to claim 9, characterized in that theglycol ether is BDGE.
- 11. The method according to claim 5, c Ii a r a c t e r i z e d I n using amine oxide as the foaming agent prior to step a.l
- 12. The method according to claim 11, characterized in that the amine oxide is dimethyl dodecyl amine oxide.
- 13. A method for at least reducing build-up of oil sludge in a separator (1) of the type structured so as to be able to separate some of those components contained in crude oil recovered from a hydrocarbon-producing well, P254230BDE c h a r a c t e r � z e d � n that the method comprises a step of supplying to the flushing water, which is used in connection with a water-flushing operation of the separator (1), a chemical arranged so as to be able to dissolve the oil sludge, wherein the flushing water with the added chemical is supplied through a flushing water system (11, 11') of the separator (1).
- 14. The method according to claim 13, c h a r a c t e r i z e d I n using as the chemical a mixture of a foaming agent and a. solvent.
- 15. The method of cleaning a vessel substantially as described herein.
- 16. The method for at least reducing build up of oil sludge in a Separator Substantially as described herein.?25423G8DR
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NO20073751A NO326974B1 (en) | 2007-07-19 | 2007-07-19 | Procedure for cleaning a container |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| GB0812879D0 GB0812879D0 (en) | 2008-08-20 |
| GB2451170A true GB2451170A (en) | 2009-01-21 |
Family
ID=39722268
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB0812879A Withdrawn GB2451170A (en) | 2007-07-19 | 2008-07-15 | Method of cleaning a crude oil separator vessel. |
Country Status (2)
| Country | Link |
|---|---|
| GB (1) | GB2451170A (en) |
| NO (1) | NO326974B1 (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102328793A (en) * | 2011-07-20 | 2012-01-25 | 江苏瑞吉格泰油气工程有限公司 | Sand washing device in horizontal vessel |
| RU2491134C1 (en) * | 2011-12-30 | 2013-08-27 | Мария Ивановна Кандаурова | Method of gas-transfer station separator cleaning and device to this end |
| RU2581394C1 (en) * | 2015-02-03 | 2016-04-20 | Станислав Александрович Галактионов | Method of cleaning separators of gas transmission stations and device therefor |
| RU2745596C2 (en) * | 2019-08-21 | 2021-03-29 | Общество с ограниченной ответственностью "ХАММЕЛЬ" | Method of preparing technological equipment for safe opening |
| FR3107194A1 (en) * | 2020-02-13 | 2021-08-20 | Ortec Expansion | Method and system for evacuating aggregates accumulated in the bottom of a tank of a desalter or sand trap. |
| WO2021221717A1 (en) * | 2020-04-30 | 2021-11-04 | Praxair Technology, Inc. | Method to remove explosive toxic gases and clean metal surfaces in hydrocarbon equipment |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2045752A (en) * | 1933-06-10 | 1936-06-30 | Butterworth System Inc | Method for freeing a container of asphaltic and oily materials |
| GB696631A (en) * | 1948-06-09 | 1953-09-02 | Reginald William Groom | Improved means for cleaning dirty oil, and reclaiming solvents, water borne detergents and the like from emulsions |
| RU2109583C1 (en) * | 1997-03-12 | 1998-04-27 | Зоя Юрьевна Чушкина | Method of tank cleaning of oil deposits and installation for its realization |
| US20040238006A1 (en) * | 2003-05-28 | 2004-12-02 | Refined Technologies, Inc. | Method of cleaning vessels in a refinery |
| US20060169305A1 (en) * | 2002-11-26 | 2006-08-03 | Refined Technologies, Inc. | Heat exchanger cleaning process |
| RU2314882C2 (en) * | 2006-02-26 | 2008-01-20 | Хатмулла Габдуллович Гильманов | Method used of cleansing of the tank from the bottom sediments and the device for the method realization |
-
2007
- 2007-07-19 NO NO20073751A patent/NO326974B1/en not_active IP Right Cessation
-
2008
- 2008-07-15 GB GB0812879A patent/GB2451170A/en not_active Withdrawn
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2045752A (en) * | 1933-06-10 | 1936-06-30 | Butterworth System Inc | Method for freeing a container of asphaltic and oily materials |
| GB696631A (en) * | 1948-06-09 | 1953-09-02 | Reginald William Groom | Improved means for cleaning dirty oil, and reclaiming solvents, water borne detergents and the like from emulsions |
| RU2109583C1 (en) * | 1997-03-12 | 1998-04-27 | Зоя Юрьевна Чушкина | Method of tank cleaning of oil deposits and installation for its realization |
| US20060169305A1 (en) * | 2002-11-26 | 2006-08-03 | Refined Technologies, Inc. | Heat exchanger cleaning process |
| US20040238006A1 (en) * | 2003-05-28 | 2004-12-02 | Refined Technologies, Inc. | Method of cleaning vessels in a refinery |
| RU2314882C2 (en) * | 2006-02-26 | 2008-01-20 | Хатмулла Габдуллович Гильманов | Method used of cleansing of the tank from the bottom sediments and the device for the method realization |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102328793A (en) * | 2011-07-20 | 2012-01-25 | 江苏瑞吉格泰油气工程有限公司 | Sand washing device in horizontal vessel |
| RU2491134C1 (en) * | 2011-12-30 | 2013-08-27 | Мария Ивановна Кандаурова | Method of gas-transfer station separator cleaning and device to this end |
| RU2581394C1 (en) * | 2015-02-03 | 2016-04-20 | Станислав Александрович Галактионов | Method of cleaning separators of gas transmission stations and device therefor |
| RU2745596C2 (en) * | 2019-08-21 | 2021-03-29 | Общество с ограниченной ответственностью "ХАММЕЛЬ" | Method of preparing technological equipment for safe opening |
| FR3107194A1 (en) * | 2020-02-13 | 2021-08-20 | Ortec Expansion | Method and system for evacuating aggregates accumulated in the bottom of a tank of a desalter or sand trap. |
| WO2021221717A1 (en) * | 2020-04-30 | 2021-11-04 | Praxair Technology, Inc. | Method to remove explosive toxic gases and clean metal surfaces in hydrocarbon equipment |
| CN115362034A (en) * | 2020-04-30 | 2022-11-18 | 普莱克斯技术有限公司 | Method for removing explosive and toxic gases and cleaning metal surfaces in hydrocarbon plants |
| US12036584B2 (en) | 2020-04-30 | 2024-07-16 | Praxair Technology, Inc. | Method to remove explosive and toxic gases and clean metal surfaces in hydrocarbon equipment |
Also Published As
| Publication number | Publication date |
|---|---|
| NO326974B1 (en) | 2009-03-30 |
| GB0812879D0 (en) | 2008-08-20 |
| NO20073751L (en) | 2009-01-20 |
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