WO1993007357A1 - An apparatus for stopping a blowout from an oil or gas well - Google Patents

An apparatus for stopping a blowout from an oil or gas well 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
Application number
PCT/NO1992/000170
Other languages
French (fr)
Inventor
Øyvind HOVENGEN
Trygvé DEKKO
Original Assignee
Hovengen Oeyvind
Dekko Trygve
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 Hovengen Oeyvind, Dekko Trygve filed Critical Hovengen Oeyvind
Publication of WO1993007357A1 publication Critical patent/WO1993007357A1/en

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21B—EARTH DRILLING, e.g. DEEP 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 DRILLING; MINING
    • E21B—EARTH DRILLING, e.g. DEEP 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 DRILLING; MINING
    • E21B—EARTH DRILLING, e.g. DEEP 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.

Abstract

An apparatus for stopping an uncontrolled blowout from an oil or gas source, especially in connection with extinction of a burning oil well on land. The apparatus comprises a delimiting member (18) for placing on the ground (4) around the well opening (5), the delimiting member (18) having first and second passages (30 resp. 31) for through-flow of the fluid escaping from the well. Further, the apparatus comprises a rail means (2, 3, 13, 14) for temporary placing on the ground (4), for rail-controlled guiding of the delimiting member (18) to a centered position above the well opening (5) in which position the opening is aligned with the first passage (30), and a means (10) for controlled lowering of the delimiting member (18) to the ground (4) in the centered position. The delimiting member (18) is a solid block element which has a substantially weight and wherein there is installed a valve means (25) having a slide element (28) which is arranged to shut off the first passage (30) during simultaneous opening of the second passage (31).

Description

An apparatus for stopping a blow-out from an oil or gas well.
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.
An apparatus of the above-mentioned type is known from Norwegian patent application No. 830639. This known apparatus is intended for delimiting and controlling a fluid flow from a sub- sea oil/gas source in a blowout from a place on the sea bed. For this purpose 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. Even if this known apparatus theoretically could be contemplated to be used also on land, for example in connection with extinction of an uncontrolled blowing, burning oil well, it would not be very suitable for this purpose because of the configuration and operation of the delimiting member. As known, one has today big problems in connection with the extinction of the many deliberately started and environmen¬ tally disastrous fires which have ravaged in Kuwait after the socalled Gulf war. According to what one knows, the means used in the extinction operations are of a relatively primitive kind and correspondingly little efficient.
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.
For the achievement of the above-mentioned object there is provided an apparatus of the introductorily stated type which, according to the invention, is characterized in that it comprises
5 a rail means for temporary placing on the ground, for rail- controlled guiding of the delimiting member to a centred position above the well opening in which position the opening is aligned with the first passage, and a means for controlled lowering of the delimiting member to the ground in said centred position, and
10 that 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.
The invention will be further described below in s connection with an exemplary embodiment with reference to the drawings, wherein
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; and
Fig. 10 shows a section along the line X-X in Fig. 9.
As appears from Figs. 1, 2 and 3, 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. On the rail means 1 there is placed 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. On the wheel bogies 8 there are mounted hydraulic jacks 10, and the hydraulic jacks on pairs of bogies 8 belonging together support respective, transversely extending, strong ιo carrier plates 11 and 12 carrying a second rail means consisting of respective pairs of transversely extending rails 13 and 14.
On the transversely extending rail pairs 13 and 14 there is placed 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
2o valve means shown in Figs. 4-10.
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. These
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
35 question, especially in flat desert regions where the apparatus primarily is intended to be applied.
At the forward end of each track there is provided a plough 22 and 23, respectively, for smoothing out possible irregularities on the ground. As suggested in Fig. 1, the height of the plough may be adjusted by means of a suitable operating means 24r 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 ιo 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.
In order to provide for sealing between the block element 18 and the ground around the well opening in question when the block element is lowered to service position, 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. In order to obtain the best possible sealing, the bridge bearing suitably 5 may be formed as a plurality of rings of increasing diameter which are placed concentrically around the passage 30. When lowering the block element, a seal is provided in that the bridge bearing is compressed to a sufficient degree because of the weight of the block element, As an alternative sealing means, a skirt (not shown) 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.
As appears from Figs. 4-10, 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. As shown, 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. As shown, 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. Thus, 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.
In the position shown in Figs. 4 and 5, 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. In Figs. 7 and 8, 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.
In order to provide for a pressure load which is as smooth as possible in the interior of the valve, 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. In order to provide for a total opening of the lower part of the passage 30 and of the second passage 31 after the slide element 28 has been moved to the position wherein the passage 30 is closed (Fig. 7), the side wall openings 33 and 36 of the slide element have a somewhat oval shape, as shown in Figs. 8 and 9.
As appears from Fig. 6, 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.
By turning the slide element 90° about the longitudinal axis from the passage-opening position (Figs. 4 and 7) simultaneous closing s of both passages 30 and 31 is thereby obtained. In this manner a quick and efficient emergency stop is achieved if this should be necessary. In addition, one obtains the possibility to replace the slide element when this possibly should be necessary, e.g. because of wear. This is made possible in that the guide sleeve ιo 27, as shown, extends right through the block element 18, the slide element 28 in said closing position then being able to be replaced with a corresponding slide element by being displaced out from the block element 18 by the corresponding slide element after insertion thereof into the sleeve 27 to tightly engaging is end-to-end contact with the first-mentioned slide element 28.
In use of the apparatus according to the invention 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. It is anticipated that such spraying-on generally will not be necessary, in that a possible fire will be extinguis¬ hed automatically when the controlled blowout is stopped by the valve means, since the fluid jet, which is burning above the o block element where there is sufficient oxygen, then will be cut. As mentioned above, a lateral adjustment of the block element takes place in that the second carriage means is run transversely backwards or forwards so that the escaping fluid jet is centred freely through the open valve. After centering, the block element is lowered by means of the hydraulic jacks and put in place on the wellhead. After the block element with the valve means has been put in place in a sealing manner on the wellhead, the carriage means and the tracks are disassembled, for use in the next "well killer" operation. After placing of the block element 18 on the wellhead, 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. In this s production position of the valve, wherein the fluid flows freely through the passage 31, the fluid will not exert any substantial pressure influence on the valve, and the well thus immediately may be put into production. If a leakage is detected when closing the control valve 39, 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. In the case where 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.

Claims

Patent claims
1. An apparatus for stopping a blowout from an oil or ga source, especially in connection with extinction of a burning oi well on land, and comprising a delimiting member (18) for placin on the ground (4) around the well opening (5), the delimitin member (18) having a first initially free passage (30) fo through-flow of the fluid escaping from the well, and a secon initially closed passage (31) which is arranged to be opene during simultaneous closing of the first passage (30), for controlled draining-off of the escaping fluid, CHARACTERIZED IN that it comprises a rail means (2, 3, 13, 14) for temporary placing on the ground (4), for rail-controlled guiding of the delimiting member (18) to a centred position above the well opening (5) in which position the opening (5) is aligned with the first passage (30), and a means (10) for controlled lowering of the delimiting member (18) to the ground (4) in said centred position, and that the delimiting member (18) is a solid block element wherein there is installed a valve means (25) having a slide element (28) which is arranged to shut off the first passage (30) during simultaneous opening of the second passage "(31).
2. An apparatus according to claim 1, CHARACTERIZED IN that the rail means comprises a first rail means (1) having rails (2, 3) for placing on either side of the well opening (5) and having a first carriage means (7) for transport of the block element (18) to the well opening (5), and that the carriage means (7) comprises a second rail means having transversely extending rails (13, 14) and a second carriage means (15) for support and transverse centering movement of the block element (18) in relation to the well opening (5).
3. An apparatus according to claim 2, CHARACTERIZED IN that at least the first rail means (1) consists of a pair of double rails (2, 3) having a carriage means (7) comprising wheel bogies (8) or support and transport of the block element (18).
4. An apparatus according to claim 2 or 3, CHARACTERIZED IN that the transversely extending rails (13, 14) are supported by hydraulic jacks (10) for lifting/lowering of the block element (18). 5. An apparatus according to any of the claims 2-4, CHARACTERIZED IN that the rails (2, 3) for placing on either side of the well opening (5) are maintained at the correct mutual distance by means of transversely extending, portal-like
5 stiffening elements (19).
6. An apparatus according to any of the claims 2-5, CHARACTERIZED IN that the rails (2, 3) for placing on either side of the well opening (5) are supported by runner-like carrier plates (21) for dragging of the rail means (2, 3) to a suitable o position for centering of the block element (18).
7. An apparatus according to any of the preceding claims, CHARACTERIZED IN that the slide element (28) of the valve means (25) is constituted by a hollow cylindrical body which is closed at both ends and in a sealing manner is slidably arranged in a s guide sleeve (27) in the block element (18), the slide element (28) and the sleeve (27) being provided with respective first side wall openings (32, 33 resp. 34, 35) for cooperation with tiie first passage (30) in the block element (18), and with respective second side wall openings (36 resp. 37) for cooperation with the o second passage (31), the distance between the first (32, 33) and second (36) side wall openings of the slide element being so adapted that the first passage (30) is closed essentially to an extent corresponding to that to which the second passage (31) is opened with longitudinal movement of the slide element (28)- 5
8. An apparatus according to claim 7, CHARACTERIZED IN that the slide element (28) has a circularly cylindrical outer surface and with a 90° rotation from the passage-opening position provides for simultaneous closing of both passages (30, 31).
9. An apparatus according to claim 8, CHARACTERIZED IN o that the guide sleeve (27) extends right through the block element (18) and the slide element (28) in said closing position can be replaced by a corresponding slide element by being displaced out from the block element (18) by the corresponding slide element after insertion thereof into the sleeve (27) to a tight-fitting end-to-end contact with the first-mentioned slide element (28).
10. An apparatus according to any of the preceding claims, CHARACTERIZED IN that the block element (18) consists of a concrete body into which the valve means (25) is cast.
11. An apparatus according to any of the preceding claims, CHARACTERIZED IN that, at the underside of the block elemen (18), there is provided a bridge bearing means (26) to provid for sealing between the block element (18) and the ground aroun s the well opening (5) in lowering of the block element an compression of the bridge bearing means because of the weight o the block element.
PCT/NO1992/000170 1991-10-10 1992-10-09 An apparatus for stopping a blowout from an oil or gas well WO1993007357A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NO913970A NO913970D0 (en) 1991-10-10 1991-10-10 DEVICE FOR STOPPING AN UNCONTROLLED EXHAUST FROM OIL OR GAS SOURCE
NO913970 1991-10-10

Publications (1)

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

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ID=19894515

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Application Number Title Priority Date Filing Date
PCT/NO1992/000170 WO1993007357A1 (en) 1991-10-10 1992-10-09 An apparatus for stopping a blowout from an oil or gas well

Country Status (3)

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

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 (en) * 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 (en) * 1991-04-02 1991-07-18

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Publication number Publication date
NO913970D0 (en) 1991-10-10
AU2870892A (en) 1993-05-03

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