NO147176B - STABILIZATION ELEMENT. - Google Patents
STABILIZATION ELEMENT. Download PDFInfo
- Publication number
- NO147176B NO147176B NO802912A NO802912A NO147176B NO 147176 B NO147176 B NO 147176B NO 802912 A NO802912 A NO 802912A NO 802912 A NO802912 A NO 802912A NO 147176 B NO147176 B NO 147176B
- Authority
- NO
- Norway
- Prior art keywords
- hydrazine hydrate
- amounts
- added
- fuels
- fuel
- Prior art date
Links
- 230000006641 stabilisation Effects 0.000 title 1
- 238000011105 stabilization Methods 0.000 title 1
- 238000005260 corrosion Methods 0.000 claims description 20
- 230000007797 corrosion Effects 0.000 claims description 20
- 239000000446 fuel Substances 0.000 claims description 20
- NWZSZGALRFJKBT-KNIFDHDWSA-N (2s)-2,6-diaminohexanoic acid;(2s)-2-hydroxybutanedioic acid Chemical compound OC(=O)[C@@H](O)CC(O)=O.NCCCC[C@H](N)C(O)=O NWZSZGALRFJKBT-KNIFDHDWSA-N 0.000 claims description 16
- IKDUDTNKRLTJSI-UHFFFAOYSA-N hydrazine monohydrate Substances O.NN IKDUDTNKRLTJSI-UHFFFAOYSA-N 0.000 claims description 16
- 239000002480 mineral oil Substances 0.000 claims description 16
- 150000001412 amines Chemical class 0.000 claims description 12
- 238000000034 method Methods 0.000 claims description 11
- 229930195733 hydrocarbon Natural products 0.000 claims description 8
- 235000010446 mineral oil Nutrition 0.000 claims description 8
- 150000002430 hydrocarbons Chemical class 0.000 claims description 7
- PAFZNILMFXTMIY-UHFFFAOYSA-N cyclohexylamine Chemical compound NC1CCCCC1 PAFZNILMFXTMIY-UHFFFAOYSA-N 0.000 claims description 6
- 239000000203 mixture Substances 0.000 claims description 6
- YNAVUWVOSKDBBP-UHFFFAOYSA-N Morpholine Chemical compound C1COCCN1 YNAVUWVOSKDBBP-UHFFFAOYSA-N 0.000 claims description 4
- JQVDAXLFBXTEQA-UHFFFAOYSA-N dibutylamine Chemical compound CCCCNCCCC JQVDAXLFBXTEQA-UHFFFAOYSA-N 0.000 claims description 4
- 239000011814 protection agent Substances 0.000 claims description 4
- KIDHWZJUCRJVML-UHFFFAOYSA-N putrescine Chemical compound NCCCCN KIDHWZJUCRJVML-UHFFFAOYSA-N 0.000 claims description 4
- GSEJCLTVZPLZKY-UHFFFAOYSA-N Triethanolamine Chemical compound OCCN(CCO)CCO GSEJCLTVZPLZKY-UHFFFAOYSA-N 0.000 claims description 3
- TWUSDDMONZULSC-QMTHXVAHSA-N (1s,2r)-2-(tert-butylamino)-1-(2,5-dimethoxyphenyl)propan-1-ol Chemical compound COC1=CC=C(OC)C([C@H](O)[C@@H](C)NC(C)(C)C)=C1 TWUSDDMONZULSC-QMTHXVAHSA-N 0.000 claims description 2
- 239000004215 Carbon black (E152) Substances 0.000 claims description 2
- HPNMFZURTQLUMO-UHFFFAOYSA-N diethylamine Chemical compound CCNCC HPNMFZURTQLUMO-UHFFFAOYSA-N 0.000 claims description 2
- 150000004986 phenylenediamines Chemical class 0.000 claims description 2
- OAKJQQAXSVQMHS-UHFFFAOYSA-N Hydrazine Chemical compound NN OAKJQQAXSVQMHS-UHFFFAOYSA-N 0.000 description 9
- 229910052751 metal Inorganic materials 0.000 description 9
- 239000002184 metal Substances 0.000 description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 9
- 239000000295 fuel oil Substances 0.000 description 5
- 238000003860 storage Methods 0.000 description 5
- -1 benzine hydrocarbons Chemical class 0.000 description 4
- 239000003921 oil Substances 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 239000010779 crude oil Substances 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- UMAPFAAAQBMYNJ-UHFFFAOYSA-N 1-n,2-n-dimethylbenzene-1,2-diamine Chemical compound CNC1=CC=CC=C1NC UMAPFAAAQBMYNJ-UHFFFAOYSA-N 0.000 description 2
- 239000007795 chemical reaction product Substances 0.000 description 2
- 230000002401 inhibitory effect Effects 0.000 description 2
- PIICEJLVQHRZGT-UHFFFAOYSA-N Ethylenediamine Chemical compound NCCN PIICEJLVQHRZGT-UHFFFAOYSA-N 0.000 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 150000003973 alkyl amines Chemical class 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 239000003963 antioxidant agent Substances 0.000 description 1
- 230000003078 antioxidant effect Effects 0.000 description 1
- 239000008346 aqueous phase Substances 0.000 description 1
- 150000004982 aromatic amines Chemical class 0.000 description 1
- 238000004210 cathodic protection Methods 0.000 description 1
- 238000003776 cleavage reaction Methods 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 239000002283 diesel fuel Substances 0.000 description 1
- 238000004821 distillation Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000011888 foil Substances 0.000 description 1
- 239000010763 heavy fuel oil Substances 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 230000002045 lasting effect Effects 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B43/00—Improving safety of vessels, e.g. damage control, not otherwise provided for
- B63B43/02—Improving safety of vessels, e.g. damage control, not otherwise provided for reducing risk of capsizing or sinking
- B63B43/10—Improving safety of vessels, e.g. damage control, not otherwise provided for reducing risk of capsizing or sinking by improving buoyancy
- B63B43/14—Improving safety of vessels, e.g. damage control, not otherwise provided for reducing risk of capsizing or sinking by improving buoyancy using outboard floating members
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B1/00—Hydrodynamic or hydrostatic features of hulls or of hydrofoils
- B63B1/02—Hydrodynamic or hydrostatic features of hulls or of hydrofoils deriving lift mainly from water displacement
- B63B1/10—Hydrodynamic or hydrostatic features of hulls or of hydrofoils deriving lift mainly from water displacement with multiple hulls
- B63B1/107—Semi-submersibles; Small waterline area multiple hull vessels and the like, e.g. SWATH
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B35/00—Vessels or similar floating structures specially adapted for specific purposes and not otherwise provided for
- B63B35/44—Floating buildings, stores, drilling platforms, or workshops, e.g. carrying water-oil separating devices
- B63B35/4413—Floating drilling platforms, e.g. carrying water-oil separating devices
Landscapes
- Engineering & Computer Science (AREA)
- Ocean & Marine Engineering (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Civil Engineering (AREA)
- Physics & Mathematics (AREA)
- Architecture (AREA)
- Fluid Mechanics (AREA)
- Structural Engineering (AREA)
- Bridges Or Land Bridges (AREA)
- Luminescent Compositions (AREA)
- Oscillators With Electromechanical Resonators (AREA)
- Furan Compounds (AREA)
- Earth Drilling (AREA)
Description
Fremgangsmåte til å hindre korrosjon av beholdere og ledninger for mineralolje og drivstoffer. Procedure to prevent corrosion of containers and lines for mineral oil and fuels.
Den sterkt økende anvendelse av mineraloljer og drivstoffer på basis av hydrokarboner i næringsliv og industri gjør det nødvendig med en lang lagring resp. opp-bevaring av disse mineraloljer som f. eks. fyringsolje og drivstoffer som f. eks. ben-sin-hydrokarbonene. Hertil anvendes mindre metallbeholdere som alt etter forbruk The strongly increasing use of mineral oils and fuels based on hydrocarbons in business and industry necessitates a long storage or storage of these mineral oils such as heating oil and fuels such as the benzine hydrocarbons. Smaller metal containers are used for this, depending on consumption
oppfylles eller større metallbeholdere som are fulfilled or larger metal containers which
f. eks. fyringsoljetanker, idet sistnevnte e.g. fuel oil tanks, the latter being
ofte lagres stedfast underjordisk eller også often stored permanently underground or also
over jorden. Også i raffineridrift består den over the earth. It also exists in refinery operations
spesielle interesse i å hindre korrosjon i special interest in preventing corrosion i
alle systemer som fører mineraloljer og all systems carrying mineral oils and
drivstoffer på basis av hydrokarboner, spesielt når disse stoffer inneholder vann. fuels based on hydrocarbons, especially when these substances contain water.
Derved foreligger det problem å be-skytte slike metallbeholdere, tanker, ledninger og innretninger mot korrosjon for at Thereby there is a problem of protecting such metal containers, tanks, lines and devices against corrosion so that
såvel metallbeholdere som ledningene ikke metal containers as well as the cables do not
skal ødelegges i løpet av kort tid, og at hel-ler ingen fremmede stoffer kommer inn i must be destroyed within a short time, and that no foreign substances enter
mineraloljen og i drivstoffene. Hertil er det the mineral oil and in the fuels. Here it is
allerede blitt foreslått å gi metallbeholde-ren en katodisk beskyttelse ved hjelp av has already been proposed to give the metal container a cathodic protection by means of
magnesium- eller aluminium-anoder (så-kalte offer-anoder) idet det i tillegg kan magnesium or aluminum anodes (so-called sacrificial anodes) as it can also
påtrykkes et tilsvarende potensial. Ytter-ligere forslag befatter seg med å utstyre a corresponding potential is impressed. Further proposals deal with equipping
metallbeholdernes og metall-ledningenes of metal containers and metal cables
indre flater med korrosjonsfaste overtrekk. inner surfaces with corrosion-resistant covers.
Slike metoder er imidlertid på den ene side However, such methods are on the one hand
kostbare og^på den annen side kompliserte. expensive and, on the other hand, complicated.
For oppberedning av matningsvann har For preparation of feed water has
man ved siden av andre kjemikalier også one next to other chemicals as well
allerede anvendt hydrazin for høytrykks-dampanlegg og varme- og koldtvannled-ninger som antioksyderende stoff. already used hydrazine for high-pressure steam plants and heating and cold water pipes as an antioxidant.
Det er nu blitt funnet en fremgangsmåte til å hindre korrosjon av metallbehol-der og metall-ledninger som opptar mineralolje og drivstoffer på basis av hydrokarboner idet det på enkel måte ved tilsetningen av små mengder av hydrazinhydrat til disse mineraloljer og drivstoffer oppnås en utmerket korrosjonsbeskyttelse. Fordelaktig anvendes mest mulig vannfritt hydrazinhydrat for ikke å bringe noen ekstra vannmengder inn i mineraloljene, resp. for helt å unngå en forurensning med vann. Ved 100 %-ig hydrazinhydrat ligger den mengde som skal anvendes under 0,1 volumprosent referert til den samlede mengde mineralolje eller drivstoff og fortrinnsvis tilsettes 0,01 til 0,001 volumprosent 100 %-ig hydrazinhydrat. Hydrazinhydratet som settes til mineraloljen og drivstoffene er opp-løselig i disse hydrokarboner i de nevnte mengder. Kommer det til en vannutskil-lelse i beholderen eller i lagringstankene så vil det i dette vann også alltid medutskilles en bestemt mengde hydrazinhydrat som da overtar korrosjonsbeskyttelsen i den van-dige fase. A method has now been found to prevent corrosion of metal containers and metal lines that absorb mineral oil and fuels based on hydrocarbons, as excellent corrosion protection is achieved in a simple way by the addition of small amounts of hydrazine hydrate to these mineral oils and fuels. It is advantageous to use as much anhydrous hydrazine hydrate as possible so as not to introduce any additional amounts of water into the mineral oils, resp. to completely avoid a contamination with water. In the case of 100% hydrazine hydrate, the amount to be used is below 0.1 volume percent referred to the total amount of mineral oil or fuel and preferably 0.01 to 0.001 volume percent 100% hydrazine hydrate is added. The hydrazine hydrate that is added to the mineral oil and fuels is soluble in these hydrocarbons in the quantities mentioned. If water is separated in the container or in the storage tanks, a certain amount of hydrazine hydrate will also always be secreted in this water, which then takes over the corrosion protection in the aqueous phase.
For å øke alkaliteten kan det fortrinnsvis anvendes mindre mengder av et organisk amin. Det kan anvendes slike aminer som er fremstillbare økonomisk og har en tilstrekkelig basisitet. Ved substitusjon av In order to increase the alkalinity, smaller amounts of an organic amine can preferably be used. Such amines can be used which can be produced economically and have a sufficient basicity. By substitution of
aminene med kortere eller lengre alkylen- the amines with shorter or longer alkylene-
grupper kan man variere oppløsningsegen- groups, you can vary the resolution properties
skapene med hensyn til deres hydrofobe, the cabinets with respect to their hydrophobicity,
resp. hydrofile egenskaper, og kan således tilpasse korrosjonsbeskyttelsen til det gjeldende anvendelsesområdet. Størrelses- respectively hydrophilic properties, and can thus adapt the corrosion protection to the applicable area of application. Size-
orden av tilsetningen av disse aminer av- order of addition of these amines of
henger av det eventuelle amins basisitet og tilsvarer omtrent hydrazinhydratets til- depends on the basicity of the possible amine and roughly corresponds to the hydrazine hydrate's
setning. sentence.
Som aminer kan det f. eks. anvendes: As amines, it can e.g. used:
1. Alkylaminer, som etylendiamin, dietylamin, dibutylamin, tetrametylendiamin osv., 2. Alkanolaminer, som trietanolamin, butoksamin osv. 3. cykloalifatiske aminer, som cykloheksylamin, cykloheksyldiamin osv. 4. aromatiske aminer, som N,N'-di-metylfenylendiamin osv. og 5. heterocykliske aminer som morfolin osv. 1. Alkylamines, such as ethylenediamine, diethylamine, dibutylamine, tetramethylenediamine, etc., 2. Alkanolamines, such as triethanolamine, butoxamine, etc. 3. Cycloaliphatic amines, such as cyclohexylamine, cyclohexyldiamine, etc. 4. Aromatic amines, such as N,N'-dimethylphenylenediamine etc. and 5. heterocyclic amines like morpholine etc.
Spesielt fordelaktig er tilsetningen av Particularly advantageous is the addition of
slike aminer som i og for seg uten hydrazin-tilsetning har korrosjonshindrende egen- such amines which in and of themselves without the addition of hydrazine have corrosion-inhibiting properties
skaper, f. eks. fenylendiaminer. creator, e.g. phenylenediamines.
Korrosjonsbeskyttelsesmidlet, som selv- The corrosion protection agent, which self-
sagt ved sin virkning er underkastet et forbruk blir ved tilsetningen ifølge frem-gangsmåten, og ved etterfylling av behol- said by its effect is subjected to a consumption becomes by the addition according to the procedure, and by refilling the container
der og ledninger med mineraler og drivstof- there and lines with minerals and fuel
fer på hydrokarbonbasis virksomt kontinu- on a hydrocarbon basis effectively continuously
erlig således at det er gitt en varende korrosjonsbeskyttelse. En slik fremgangsmåte har den store fordel at korrosjonsbeskyttel- honest so that lasting corrosion protection is provided. Such a method has the great advantage that corrosion protection
sen alltid igjen medleveres og beholder- then always again delivered and keep-
resp. tankeierne behøver selv ikke å sørge for korrosjonsbeskyttelsen. Samtidig er det her av viktighet at det 100 %-ige hydraziri- respectively the tank owners themselves do not have to provide the corrosion protection. At the same time, it is important here that the 100% hydraziri-
hydrat som korrosjonsbeskyttelsesmiddel hverken selv eller dets reaksjonsprodukter er stoffer som utøver en hemmende inn-virkning med hensyn til anvendelsen som f. eks. ved fyringsolje og bensinhydrokar- hydrate as a corrosion protection agent neither itself nor its reaction products are substances that exert an inhibitory effect with regard to the application such as e.g. in the case of fuel oil and petrol hydrocar-
boner for Otto-motorer, da det ved den nor- bonuses for Otto engines, as at the nor-
male spaltningsreaksjon av hydrazinet som reaksjonsprodukter oppstår vann og nitro- mal cleavage reaction of the hydrazine as reaction products arise water and nitro-
gen. Eksemplene viser fremstillingen av mineraloljer og drivstoffer som er tilsatt med korrosjonsbeskyttelsesmiddel. gen. The examples show the production of mineral oils and fuels which have been added with a corrosion protection agent.
Eksempel 1: Example 1:
Til 1000 liter av en lett fyringsolje eller For 1000 liters of a light heating oil or
et dieseldrivstoff setter man 100 ml 100 %- a diesel fuel, you put 100 ml of 100%-
ig hydrazinhydrat. Tildoseringen foregår ved hjelp av en doseringspumpe i en trans-portledning for oljen. ig hydrazine hydrate. Dosing takes place using a dosing pump in a transport line for the oil.
Eksempel 2: Example 2:
Til 1000 liter motorbensin settes 20 ml Add 20 ml to 1000 liters of motor petrol
100 %-ig hydrazinhydrat og blandingen gjennomrøres godt inntil det oppstår en klar oppløsning. 100% hydrazine hydrate and the mixture is thoroughly stirred until a clear solution is formed.
Eksempel 3: Example 3:
I en tung fyringsolje tildoseres det i transportledningen til tanken og i den opp-varmede olje en blanding av 1 del hydrazinhydrat og 1 del cykloheksylamin i en mengde av 30 ml/t. In a heavy fuel oil, a mixture of 1 part hydrazine hydrate and 1 part cyclohexylamine is dosed in the transport line to the tank and in the heated oil in a quantity of 30 ml/h.
Eksempel 4: Example 4:
For å unngå korrosjon i kraftstof f tan- To avoid corrosion in fuel f tan-
ker og -ledninger blir det til kraftstoffet best med en gang i raffineriet satt en mengde på 250 g N,H,. H20 + 250 g mor- kers and lines, it is best to add a quantity of 250 g of N,H, to the fuel immediately in the refinery. H20 + 250 g mother-
folin pr. tonn. Tilsetningsmengden er her å foil per ton. The amount of addition is here to
velge noe høyere når kraftstoffet inntil endelig avfylling luftes meget sterkt. For anvendelse av kraftstoffet har en slik til- choose something higher when the fuel is heavily aerated until final filling. For the use of the fuel, such an
setning ingen innflydelse, og det er da bare for lagringen det kommer en økning av oksydasjonsbestandigheten. sentence no influence, and it is then only for storage that there is an increase in oxidation resistance.
Eksempel 5: Example 5:
Ved ifyIling av fyringsolje i en lag-ringstank tilsettes det pr. m<3> fyringsolje 100 g N2H4 . H,0 + 150 g cykloheksyldiamin. When filling fuel oil in a storage tank, it is added per m<3> fuel oil 100 g N2H4 . H,0 + 150 g of cyclohexyldiamine.
Dermed sikres en jevn gjennomblanding This ensures even mixing
med fyringsoljen og følgelig en korrosj ons-beskyttelse for tanken. with the fuel oil and consequently a corrosion protection for the tank.
Eksempel 6: Example 6:
Ved destillasjonen av råolje settes det During the distillation of crude oil, it is set
for å unngå korrosjon i anlegget til den tilrennende råolje best ved hjelp av en doseringspumpe kontinuerlig en tilsvarende blanding av hydrazin og trietanolamin. Herunder må det påsees at den siste tilset- in order to avoid corrosion in the plant to the incoming crude oil best by means of a dosing pump continuously a corresponding mixture of hydrazine and triethanolamine. Below, it must be ensured that the last addi-
ning sikkert nøytraliserer råoljens sure be-standdeler og et slikt overskudd dessuten kommer til anvendelse at også dampene i forbindelse med vann reagerer alkalisk og heri også er påvisbart et overskudd av N2H|. På denne måte er det mulig å holde rørledninger, varmeutvekslere og kjølere ytterliggående korrosj onsf rie. Trietanol- ning certainly neutralizes the acid components of the crude oil and such an excess also comes into use that the vapors in connection with water also react alkaline and here too an excess of N2H| is demonstrable. In this way, it is possible to keep pipelines, heat exchangers and coolers extremely corrosion-free. triethanol
aminet lar seg erstatte med fenylendiami- the amine can be replaced by phenylenediami-
ner f. eks. N,N'-dimetyl-fenylendiamin. down e.g. N,N'-dimethyl-phenylenediamine.
Claims (6)
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NO802912A NO147176C (en) | 1980-10-01 | 1980-10-01 | STABILIZATION ELEMENT. |
| DK431581A DK153750C (en) | 1980-10-01 | 1981-09-29 | STABILIZATION ELEMENT |
| GB8129480A GB2084529B (en) | 1980-10-01 | 1981-09-30 | Stabilizing element |
| NLAANVRAGE8104472,A NL190546C (en) | 1980-10-01 | 1981-09-30 | Stabilizing element for a floating platform construction of the semi-submersible type. |
| SE8105780A SE442736B (en) | 1980-10-01 | 1981-09-30 | stabilizing members |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NO802912A NO147176C (en) | 1980-10-01 | 1980-10-01 | STABILIZATION ELEMENT. |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| NO802912L NO802912L (en) | 1982-04-02 |
| NO147176B true NO147176B (en) | 1982-11-08 |
| NO147176C NO147176C (en) | 1983-02-16 |
Family
ID=19885682
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NO802912A NO147176C (en) | 1980-10-01 | 1980-10-01 | STABILIZATION ELEMENT. |
Country Status (5)
| Country | Link |
|---|---|
| DK (1) | DK153750C (en) |
| GB (1) | GB2084529B (en) |
| NL (1) | NL190546C (en) |
| NO (1) | NO147176C (en) |
| SE (1) | SE442736B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SE438300B (en) * | 1983-09-07 | 1985-04-15 | Goetaverken Arendal Ab | DEVICE AT SEMISUBMERSIBLE OFFSHORE DRIVING DEVICE DEVICE AT SEMISUBMERSIBLE OFFSHORE DRIVING COST |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3610193A (en) * | 1969-07-29 | 1971-10-05 | Bethelehem Steel Corp | Offshore drilling structure |
| USRE29478E (en) * | 1971-05-03 | 1977-11-22 | Santa Fe International Corporation | Single column semisubmersible drilling vessel |
| US3837309A (en) * | 1971-06-17 | 1974-09-24 | Offshore Technology Corp | Stably buoyed floating offshore device |
| US3880102A (en) * | 1974-02-19 | 1975-04-29 | Offshore Technology Corp | Method and apparatus for offshore submersible oil storage and drilling |
-
1980
- 1980-10-01 NO NO802912A patent/NO147176C/en unknown
-
1981
- 1981-09-29 DK DK431581A patent/DK153750C/en not_active IP Right Cessation
- 1981-09-30 NL NLAANVRAGE8104472,A patent/NL190546C/en not_active IP Right Cessation
- 1981-09-30 GB GB8129480A patent/GB2084529B/en not_active Expired
- 1981-09-30 SE SE8105780A patent/SE442736B/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| NO147176C (en) | 1983-02-16 |
| DK153750C (en) | 1989-01-30 |
| NL8104472A (en) | 1982-05-03 |
| NL190546C (en) | 1994-04-18 |
| SE442736B (en) | 1986-01-27 |
| NL190546B (en) | 1993-11-16 |
| DK153750B (en) | 1988-08-29 |
| GB2084529A (en) | 1982-04-15 |
| NO802912L (en) | 1982-04-02 |
| SE8105780L (en) | 1982-04-02 |
| DK431581A (en) | 1982-04-02 |
| GB2084529B (en) | 1984-06-27 |
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