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WO1993007357A1 - Appareil empechant les eruptions des puits de petrole ou de gaz - Google Patents

Appareil empechant les eruptions des puits de petrole ou de gaz Download PDF

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Publication number
WO1993007357A1
WO1993007357A1 PCT/NO1992/000170 NO9200170W WO9307357A1 WO 1993007357 A1 WO1993007357 A1 WO 1993007357A1 NO 9200170 W NO9200170 W NO 9200170W WO 9307357 A1 WO9307357 A1 WO 9307357A1
Authority
WO
WIPO (PCT)
Prior art keywords
passage
block element
opening
well
slide element
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.)
Ceased
Application number
PCT/NO1992/000170
Other languages
English (en)
Inventor
Øyvind HOVENGEN
Trygvé DEKKO
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of WO1993007357A1 publication Critical patent/WO1993007357A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

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
    • E21B34/00—Valve arrangements for boreholes or wells
    • E21B34/02—Valve arrangements for boreholes or wells in well heads
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B33/00—Sealing or packing boreholes or wells
    • E21B33/02—Surface sealing or packing
    • 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
    • E21B35/00—Methods or apparatus for preventing or extinguishing fires

Definitions

  • An apparatus for stopping a blow-out from an oil or gas well is provided.
  • the invention relates to an apparatus for stopping a blowout from an oil or gas source, especially in connection with extinction of a burning oil well on land, and comprising a delimiting member for placing on the ground around the well opening, the delimiting member having a first initially free passage for through-flow of the fluid escaping from the well, and a second initially closed passage which is arranged to be opened during simultaneous closing of the first passage, for controlled draining-off of the escaping fluid.
  • the delimiting member of the apparatus consists of at least two sections which are arranged to be lowered by means of cranes to a suitable position above the blowout location, and to be moved laterally together and locked to each other in a position in which the sections together define a central downwardly open cavity communicating with said passages. In the locked condition the delimiting member is lowered to the sea bed and secured thereto by means of barbed bolts shot into the ground.
  • the object of the invention therefore is to provide an apparatus which in an efficient manner can be used to stop and get under control a blowout from a burning oil well, especially in flat desert regions, and thus simultaneously extinguish the oil fire.
  • an apparatus of the introductorily stated type which, according to the invention, is characterized in that it comprises
  • the delimiting member is a solid block element wherein there is installed a valve means having a slide element which is arranged to shut off the first passage during simultaneous opening of the second passage.
  • Fig. 1 shows a side view of an apparatus according to the invention
  • Fig. 2 shows a schematic simplified plan view of the o apparatus in Fig. 1, on a somewhat reduced scale
  • Fig. 3 shows a section along the line III-III in Fig. 2
  • Fig. 4 shows a schematic longitudinal view of the valve means of the block element
  • Fig. 5 shows a section along the line V-V in Fig. 4;
  • Fig. 6 shows an end view in the direction of the arrow A in Fig * 4;
  • Fig. 7 shows a schematic longitudinal view correspon ⁇ ding to Fig. 4, but with the valve means in another operational position;
  • Fig. 8 shows a section along the line VIII-VIII " in Fig. 7;
  • Fig. 9 shows a schematic longitudinal view of the valve means wherein the slide element thereof is turned 90° relative to the position in Fig. 7;
  • Fig. 10 shows a section along the line X-X in Fig. 9.
  • the apparatus includes a first rail means 1 consisting of a pair of double rails or tracks 2, 3 for temporary placing on the ground 4 on either side of the wellhead or well opening 5 of a well 6 which is subjected to an uncontrolled blowout and possibly simul ⁇ taneously is at fire.
  • a first carriage means 7 which, i.a., comprises four wheel bogies 8 5 (omitted in the schematic view in Fig. 2) which may be of a commonly occurring type and are shown to be provided with brake blocks 9.
  • a second carriage means 15 which also comprises four wheel
  • bogies 16 which are also of a conventional type, but of a smaller s size than the bogies 8. Pairs of the bogies 16 belonging together support a respective carrier beam or girder 17 extending parallel with the tracks 2, 3. These girders 17 support in a suitable manner the blowout-preventing block element 18 of the apparatus, which element will be further described in connection with the
  • the tracks 2 and 3 are maintained at the appropriate mutual distance by means of a plurality of transversely exten ⁇ ding, portal-like stiffening elements 19 which are placed at suitable intervals along the track length in question.
  • 25 elements have a height which is sufficient for the block element .18 in question to pass beneath the portals when moved to the proper place on the tracks after these having been pulled into position on either side of the well opening 5.
  • the tracks 2 and 3 are supported in the usual manner by so sleepers 20, and under the sleepers there are placed carrier plates 21 of steel which, at the forward end of the tracks, are curved upwards as shown in Fig. 1, and thus form runner-like sliding plates. Thereby the rail means readily can be dragged in place to the desired position in relation to the well in f
  • each track there is provided a plough 22 and 23, respectively, for smoothing out possible irregularities on the ground.
  • the height of the plough may be adjusted by means of a suitable operating means 24 r e.g. a hydraulic cylinder.
  • the blowout-preventing block element 18 of the appara ⁇ tus and the valve means 25 thereof are shown in Figs. 4-10.
  • the 5 block element suitably consists of a cast concrete body of such a size and weight that, during operation, when placed on the wellhead in question, the block element rests quite stably on the ground because of its own weight, without being influenced in an appreciable manner by the pressure of the escaping fluid.
  • the ⁇ o weight of the body in practice may be approximately 30 tons, but the size and weight may vary according to requirement.
  • the block element 18 may be cast in a prefabricated shuttering of steel elements, in which the valve means 25 is placed, and which is stripped down after the concrete has s hardened.
  • a so-called bridge bearing 26 advantageously may be arranged at the o underside of the block element (suggested only in Fig. 4).
  • This may be of a conventional type and in a usual manner consists of a plurality of layers of disk elements of alternately metal and a suitable resilient, preferably synthetic, material.
  • the bridge bearing suitably 5 may be formed as a plurality of rings of increasing diameter which are placed concentrically around the passage 30.
  • a seal is provided in that the bridge bearing is compressed to a sufficient degree because of the weight of the block element.
  • a skirt in the form of a steel sleeve or cylinder which is pressed into the ground around the wellhead when the block element is lowered, may be arranged at the underside of the block element.
  • the valve means 25 in the illustrated embodiment comprises a fixed valve member in the form of a tubular guide sleeve 27 which is cast into the block element 18, and a slide element 28 which in a sealing manner, by means of suitable not shown sealing rings, is slidably arranged in the sleeve 27.
  • the slide element is constituted by a hollow, cylindrical body which is closed at both ends, possibly by means of applied end covers or lids, so that the slide element has an inner cavity 29.
  • the block element 18 has a first passage 30 and a second passage 31, both of these passages being able to be brought into connection with the inner cavity 29 of the slide element via adapted side wall openings in the guide sleeve 27 and the slide element 28.
  • the slide element 28 and the sleeve 27 have respective first side wall openings 32, 33 and 34, 35, respectively, cooperating with the first passage 30 in the block element 18, and a respective second side wall opening 36 and 37, respectively, for cooperation with the second passage 31.
  • the slide element 28 of the valve means is placed in the position wherein the valve is open for free through-flow of fluid through the first passage 30, i.e. the position for free blowout when the block element 18 in the initial phase is put in place over the well opening 5.
  • the slide element 28 is placed in a position wherein the first passage 30 is closed, whereas the second passage 31 is opened, so that the uncontrolled blowout is now stopped and the fluid flows in a controlled manner via the passage 31 to a transfer conduit 38 wherein there is shown to be installed a control or stop valve 39.
  • the distance between the first and second side wall openings 32 and 36 of the slide element 28 is adapted in such a manner in relation to the distance between the passages 30, 31 that the first passage 30 is closed substantially to the same extent as the second passage 31 is opened during the longitudinal movement of the slide element 28.
  • the side wall openings 33 and 36 of the slide element have a somewhat oval shape, as shown in Figs. 8 and 9.
  • the cylindrical slide element 28 has a circularly cylindrical outer surface, so that it is rotatable about its longitudinal axis in the guide sleeve 27.
  • the valve thus may be considered as a combined slide and ball valve, and this structure affords substantial advantages in practice.
  • the tracks 2 and 3 are firstly dragged in place by means of suitable pulling equipment, such as a bulldozer, e.g. by means of a pair of wires attached between the pulling equipment and the forward o end of the tracks. Thereafter, the above described carriage means together with the complete block element are placed on the tracks, and the block element is run to its place. If it is the question of a burning oil well, the fire area may be cooled down and the well possibly be extinguished in that liquid nitrogen is 5 sprayed on at the same time as the block element is run in place and lowered.
  • suitable pulling equipment such as a bulldozer
  • the valve means 25 is manoeuvred such that the passage 30 is closed and the fluid flow is guided through the passage 31 to the transfer conduit 38 for accumulation and processing.
  • the fluid will not exert any substantial pressure influence on the valve, and the well thus immediately may be put into production.
  • this valve may be opened once more so that o the leakage problem ceases, and one will then easily be able to get to it to carry out additional sealing works if this should be necessary.
  • There may then possibly be excavated around the bridge bearing and cast another foundation, or carried out other suitable sealing measures.
  • the block element s is provided with a depending annular skirt which is pressed into the ground, this may be directly filled with concrete in order to achieve the necessary sealing.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Geology (AREA)
  • Mining & Mineral Resources (AREA)
  • Physics & Mathematics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Sliding Valves (AREA)

Abstract

Appareil destiné à empêcher toute éruption non maîtrisée d'un gisement de pétrole ou de gaz, et notamment à éteindre l'incendie d'un puits de pétrole terrestre. L'appareil comporte un élément délimiteur (18) devant se placer au sol (4) autour de l'orifice (5) du puits et possédant un premier et un second passage (30, 31) permettant l'écoulement du fluide s'échappant du puits. En outre, l'appareil comporte des voies à rails (2, 3, 13, 14) devant se placer temporairement au sol (4) et servant à guider l'élément délimiteur (18) vers une position centrée au-dessus de l'orifice (5) du puits, dans laquelle cet orifice est aligné sur le premier passage (30); ainsi qu'un dispositif (10) servant à abaisser de manière contrôlée jusqu'au sol (4) l'élément délimiteur centré (18). Ledit élément délimiteur (18) est un élément monobloc de poids considérable dans lequel est installée une vanne (25) possédant un élément coulissant (28) destiné à venir obturer le premier passage (30) pendant l'ouverture simultanée du second passage (31).
PCT/NO1992/000170 1991-10-10 1992-10-09 Appareil empechant les eruptions des puits de petrole ou de gaz Ceased WO1993007357A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NO913970 1991-10-10
NO913970A NO913970D0 (no) 1991-10-10 1991-10-10 Innretning for stansing av en ukontrollert utblaasning fraen olje- eller gasskilde

Publications (1)

Publication Number Publication Date
WO1993007357A1 true WO1993007357A1 (fr) 1993-04-15

Family

ID=19894515

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/NO1992/000170 Ceased WO1993007357A1 (fr) 1991-10-10 1992-10-09 Appareil empechant les eruptions des puits de petrole ou de gaz

Country Status (3)

Country Link
AU (1) AU2870892A (fr)
NO (1) NO913970D0 (fr)
WO (1) WO1993007357A1 (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1857788A (en) * 1928-12-26 1932-05-10 John S Murphy Method and apparatus for extinguishing gas and oil well fires
US4323118A (en) * 1980-02-04 1982-04-06 Bergmann Conrad E Apparatus for controlling and preventing oil blowouts
AU7399291A (fr) * 1991-04-02 1991-07-18

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1857788A (en) * 1928-12-26 1932-05-10 John S Murphy Method and apparatus for extinguishing gas and oil well fires
US4323118A (en) * 1980-02-04 1982-04-06 Bergmann Conrad E Apparatus for controlling and preventing oil blowouts
AU7399291A (fr) * 1991-04-02 1991-07-18

Also Published As

Publication number Publication date
AU2870892A (en) 1993-05-03
NO913970D0 (no) 1991-10-10

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