NO783973L

NO783973L - AUTOMATIC OIL CLOSURE DEVICE BLOW-OUT FROM OIL DRILLING PLATES.

Info

Publication number: NO783973L
Application number: NO783973A
Authority: NO
Inventors: Erling K Gangstoe Olsen
Original assignee: Erling K Gangstoe Olsen
Priority date: 1978-11-27
Filing date: 1978-11-27
Publication date: 1980-05-28

Description

Aaordaingen, som. forutsetningsvis skal innstalleres ombord på oljeboringsplattformer, har det generelle formålet at anordningen ikke skal virke generende inn på bruk av de ventiler^The Aaordaingen, which. presumably to be installed on board oil drilling platforms, has the general purpose that the device should not interfere with the use of the valves^

rør og annet utstyr som benyttes under boring og tapping av oljen. pipes and other equipment used during drilling and tapping the oil.

Det er tidligere kjent å benytte forskjellige midler for å forsøke å stenge olje blow-out. Ben f elles mangel ved alle slike kjente forsøk er at man må utføre en rekke manuelle operasjoner mens mannskapet, som må utføre dette, befinner seg i nedslags-feltet for den utstrømmende oljen, hvilket medfører både en sunnhetsmessig fare og er meget vanskelig å utføre. En annen mangel er at et slikt arbeide alltid tar mange timer og dette bevirker at oljeutstrømmingen forårsaker tilgrising av sjøen som alltid medfører et stort og kostbart arbeide for å fjerne oljen fra sjøens overflate. Andre mangler ved de idag benyttede manuelle metoder for å stanse en olje blow-out er at den, fordi det alltid slipper ut meget olje før den blir stoppet, medfører fare for oljebrann og tap av kostbar olje. It is previously known to use different means to try to close oil blow-out. The common shortcoming of all such known attempts is that one has to perform a series of manual operations while the crew, who have to perform this, are in the impact field of the flowing oil, which entails both a health hazard and is very difficult to perform. Another shortcoming is that such work always takes many hours and this means that the oil outflow causes fouling of the sea, which always entails a large and expensive job to remove the oil from the sea's surface. Another shortcoming of the manual methods used today to stop an oil blow-out is that, because a lot of oil always escapes before it is stopped, it entails the risk of an oil fire and the loss of precious oil.

Oppfinnelsens særegne formål består i at hvis det skulle oppstå en olje blow-out ombord på en oljeboringsplattform hvor denne anordning er montert, vil oljeutstrømmingen bli stoppet automatisk uten manuell inngripen i løpet av kort tid og uten at mannskapene behøver å nærme seg nedf allsstedet så lenge som oljen fortsetter å strømme ut. The specific purpose of the invention is that if an oil blow-out were to occur on board an oil drilling platform where this device is installed, the oil outflow will be stopped automatically without manual intervention within a short time and without the crews having to approach the site for so long as the oil continues to flow out.

Denne oppgave er løst ved at det under det dekket hvor oljerøret med boreutstyr, avtapnings- og stengemidler befinner seg, fjernes en del av oljerøret og der innsettes et mellomstykke hvori er innsatt et ønsket antall skråttstillede og glidbare bolter som styres av hydrauliske sylindre eller lignende, for stengning og åpning av oljerørets indre areal og ved at boltene har kanaler som i en bestemt stilling vil åpne en forbinnftIse fra oljerøret og til ett omkring mellomstykket bygget gass- og vanntett hus fylles med olje gjennom nevnte kanaler og ved at en forandring av forskjellen mellom oljetrykket i mellomstykket og huset, automatisk vil bevirke at boltene av de hydrauliske sylindrene, eller ved andre mekaniske- eller elektriske midler, vil bli presset inn til stengestilling med en ønsket og regulerbar hastighet*This task is solved by removing part of the oil pipe under the cover where the oil pipe with drilling equipment, draining and sealing means is located and inserting an intermediate piece into which is inserted a desired number of inclined and sliding bolts controlled by hydraulic cylinders or the like. for closing and opening the inner area of the oil pipe and by the fact that the bolts have channels which in a certain position will open a connection from the oil pipe and to a gas and watertight house built around the middle piece is filled with oil through said channels and by a change in the difference between the oil pressure in the intermediate piece and the housing, will automatically cause the bolts of the hydraulic cylinders, or by other mechanical or electrical means, to be pressed into the closed position at a desired and adjustable speed*

Konstruksjonen kan oppvise følgende fordeler: The construction can exhibit the following advantages:

1. Anordningen muliggjør at en olje blow-out på en oljeboringsplattform automatisk vil bli stoppet fullstendig et vist antall sekunder etterat den har startet* 2. Stengingen av oljeutslippet vil skje uten inngripen av noe slag fra mannskapets side*3. Ingen mannskaper behøver å begi seg inn i oljeutslippets nedfallsområde før etterat oljeutstrømmingen har stoppet fullstendig. 1. The device enables an oil blow-out on an oil drilling platform to be automatically stopped completely a certain number of seconds after it has started* 2. The closure of the oil spill will occur without intervention of any kind from the crew*3. No crews need to enter the fallout area of the oil spill until after the oil flow has stopped completely.

4*Anordningen krever ingen ombygging eller tillegg av noe slag til den armatur og de batjeningsmidler som benyttes under boring og oljeavtapping* 4*The device does not require any conversion or addition of any kind to the fixture and the bath equipment used during drilling and oil draining*

5*De benyttede stengemidler vil aldri kunne bevirke lekkasje av olje til omgivelsene, hverken under blow-outen eller senere* 6. Stenging av oljeutstrømmingen kan foretas uten bruk av slam eller fludium*. 5*The sealing means used will never be able to cause leakage of oil to the surroundings, neither during the blow-out nor later* 6. Closing the oil outflow can be carried out without the use of mud or fludium*.

7*. Stenge anordningen kan også benyttes til avstengning av olje-strømmen når man skal skifte oljebor* 7*. The shut-off device can also be used to shut off the oil flow when changing the oil drill*

Et utførelseseksempel på oppfinnelsen er vist på figurene 1-3, hvor fig* 1 viser anordningen sett fra siden og figurene 2 og 3 viser et forstørret snitt av stengemekanismen, sett henholdsvis fra siden og ovenfra. An embodiment of the invention is shown in figures 1-3, where figure* 1 shows the device seen from the side and figures 2 and 3 show an enlarged section of the closing mechanism, seen respectively from the side and from above.

På hovedoljerøret 1, som fører gjennom dekket 2 og som på toppen er forsynt med ventiler for avtapping, tilførselrør for boreslam eller borefludium, stengedeks^l m. v., innsettes på oljerøret under dekket et mellomstykket* 1 dette er det laget skråttstillede styringsspor 4 hvori er anbragt eksempelvis seks fir-kantede stengebolter 5»Omkring mellomstykket er det festet en ring 6 med tilsvarende styringsspor 4. Boltene som styres frem og tilbake i sporene 4 ved hjelp av en hydraulisk sylinder 7 for endene av disse, eller ved hjelp av andre drivmidler, vil i sine innerste stillinger med sine vertikalstående og spisse On the main oil pipe 1, which leads through the deck 2 and which is equipped at the top with valves for draining, supply pipe for drilling mud or drilling fluid, plug cover, etc., an intermediate piece is inserted on the oil pipe below the deck* 1 this is made inclined guide grooves 4 in which are placed for example six square locking bolts 5"A ring 6 with corresponding guide grooves 4 is attached around the intermediate piece. The bolts which are guided back and forth in the grooves 4 by means of a hydraulic cylinder 7 for the ends of these, or by means of other means of propulsion, will in their innermost positions with their upright and pointed

Claims

end surfaces 8, which then rest against each other, seal for the passage of oil in the main oil pipe. Under the cover, a pressure- and gas-tight housing 9 is built around the aforementioned components. At the bottom of this, one or more tap pipes 10 with valves are placed. In the bolts, an angular channel 11 is drilled from the bottom end". A pipe from the center of the intermediate piece leads to a manometer 12 which at all times shows the pressure in the oil pipe 1. The device is used in the following way When draining oil through the main oil ear 1 takes place, the bolts 5 are pushed in with the channels 11 in position a. The bolts are then pulled out slightly to position b so that the channels 11 come outside the grooves 4. Thereby the entire housing 9 will be filled with oil, thereby creating the same oil pressure in the housing as in the main oil pipe. The bolts are then moved back so that the channels 11 again occupy position a and there is now no channel connection between the main oil pipe and the housing./i> If an oil blow-out occurs so that the oil is forced up through the top of the main oil pipe, the pressure in the manometer 12 decrease in relation to the pressure in a manometer 13 whose pipe leads in nn to the housing 9*This will cause the hydraulic cylinders z to immediately begin to press the bolts 5 inwards towards each other. The speed at which the bolts are brought together towards the closing point can be regulated to avoid excessively high pressure occurring in the oil pipe and intermediate piece while the oil flow is slowed down to zero speed. By the fact that the bolts are arranged in an inclined position towards each other and by the fact that the entire housing is filled with oil, a tight closure is ensured while the bolts are always kept lubricated. With the help of the valves on the drain pipes 10 at the bottom of the housing, the housing can be emptied of oil and also at any time regulate the oil pressure in the housing down to a desired level. The house is built in an upper and a lower section, connected with flanges 14, for easy access to the intermediate piece and the fitting. Patent claims. 1 •, Device for automatic closure in case of oil blow-out from oil drilling platforms without manual intervention by crews, characterized by removing a part of the oil pipe (1) through which the oil draining takes place at a place under the deck where the fitting for drilling and oil draining takes place and that instead the removed oil pipe, an intermediate piece (3) is inserted, which has a center barrel with a diameter that is at least as large as the internal diameter of the oil pipe*in which a desired number of locking bolts (5) are inserted into guide grooves (4) which are slidable in a preferably downwards position and which are controlled in their movements in the grooves (4) in the intermediate piece and corresponding grooves (4) in one ring (6) placed around the intermediate piece, by hydraulic cylinders (7) or by other means of propulsion, whose movements cause the bolts (5) to open or shuts off the oil flow through the pipe (1)*.

2. Device according to claim 1, characterized in that the above-mentioned components are placed in a pressure- and gas-tight housing (9) in the bottom of which is placed a drain pipe (10) with shut-off valves.

3" - Device according to claims 1-2, characterized in that a pipe leads from the center line of the intermediate piece (3) to a pressure gauge (12) and a pipe from the housing to a pressure gauge (13)"both located outside the housing"

4. Device according to claim 1, characterized in that the bottom ends of the closing bolts (3) are designed as pointed vertical surfaces which, when the bolts are in the closing position, form oil-tight connections (8) against each other. 3"A device according to claims 1 and 4, characterized in that angular channels (11) are placed in the closing bolts (5) which, in the outer position (b) of the bolts, form a connection between the oil pipe (1) and the housing (9)*6. Device according to claim ©1-5, characterized in that, in the event of an oil blow-out, the hydraulic cylinders (7) or equivalent propellants will press the bolts (5) to the closed position automatically by the pressure in the manometer (12) falling in relation to the pressure in the manometer (1.3)• 7*Device according to claims 1-6, characterized in that the speed with which the propellant (7) presses the bolts (3) to the closed position in the event of an oil blow-out can be regulated*