WO2012140076A2 - Procédé et dispositif pour enfermer un trou de forage - Google Patents

Procédé et dispositif pour enfermer un trou de forage Download PDF

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Publication number
WO2012140076A2
WO2012140076A2 PCT/EP2012/056570 EP2012056570W WO2012140076A2 WO 2012140076 A2 WO2012140076 A2 WO 2012140076A2 EP 2012056570 W EP2012056570 W EP 2012056570W WO 2012140076 A2 WO2012140076 A2 WO 2012140076A2
Authority
WO
WIPO (PCT)
Prior art keywords
foundation body
bell
bell element
borehole
ground
Prior art date
Application number
PCT/EP2012/056570
Other languages
German (de)
English (en)
Other versions
WO2012140076A3 (fr
Inventor
Paul Junk
Jürgen Meyer
Original Assignee
Kosmedi Gmbh
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 Kosmedi Gmbh filed Critical Kosmedi Gmbh
Publication of WO2012140076A2 publication Critical patent/WO2012140076A2/fr
Publication of WO2012140076A3 publication Critical patent/WO2012140076A3/fr

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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
    • E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
    • E21B43/01—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells specially adapted for obtaining from underwater installations
    • E21B43/0122—Collecting oil or the like from a submerged leakage

Definitions

  • the invention relates to a method for enclosing at least one borehole located in a bottom, comprising the following steps: a) The borehole is surrounded by a foundation body surrounding it, which is arranged in or on the ground. b) A bell element is connected in a force-transmitting manner to the foundation body, so that an interior area of the bell element is spatially separated from an exterior area.
  • the invention relates to a device for enclosing at least one borehole located in a base, comprising a foundation body enclosing the borehole, arranged in or on the ground, and a bell element, which is connected in a force-transmitting manner to the foundation body, so that an interior area of the substrate is provided. tion from an outdoor area is spatially separable.
  • a device to seal out of control boreholes in the deep sea area and render harmless is disclosed in the utility model DE 20 2010 008 170 U 1.
  • This presents a bell, which has an opening on a bottom to be slipped over a borehole.
  • By closing a further, located on an upper opening is formed due to steadily flowing from the damaged well oil in an inner region of the bell, an overpressure.
  • This is then channeled in such a way that it has a mechanism for sealing the defective borehole result.
  • This mechanism uses the pressure generated in the interior of the bell to inflate an elastic ring element arranged around a damaged conveying tube and finally to seal the conveying tube.
  • a disadvantage of the device shown is that the disclosed bell can only withstand its own weight overpressure in its interior and the bell can be moved from an intended position above the borehole, as long as a jamming of the bell with one of the damaged well projecting delivery pipe has not occurred.
  • jamming is achieved in DE 20 2010 009 170 U 1 by means of the mechanism already mentioned, which uses the overpressure in the inner region of the bell to press a clamping element of the bell against the conveyor tube.
  • a secure placement of such a device which is only fixed by its own weight, is difficult to achieve.
  • US 2,532,341 shows a hood for submerged boreholes, which has a foundation body on a base comparable to a device of the type described above.
  • An anchoring element anchored on this foundation has, on an upper side, a non-closable opening through which concrete can be filled.
  • the invention shows a capsule in whose interior installations such as a valve are arranged so that an oil flow can be discharged controlled from the well. This capsule is also connected to the foundation body.
  • the hood shown is particularly disadvantageous in that an installation is complicated and expensive, since many small parts and assembly steps are performed to achieve a desired result. In the case of an accident and a Page 3 of 23 accompanying leakage of a borehole, subsequent sealing by means of the hood disclosed in US Pat. No. 2,563,341 can not be carried out.
  • the invention has for its object to further develop a method and apparatus of the type described above in that both a preventive installation of the device and an installation of the device in the event of an accident is fast, inexpensive, easy and safe to carry out.
  • the underlying object is achieved by the following method step: c) The inner area is pressure-tightly separated from the outer area.
  • a pressure-tight separation of the inner area from the outer area guarantees that no oil escapes uncontrolled from the inner area.
  • an internal pressure forms in the interior of the bell element.
  • the foundation body itself, regardless of whether it rests on the ground or is embedded in the ground, only on an upper side with the internal pressure applied, so that it is automatically pressed onto the ground. If the connection between the bell element is made strong enough and a seal of the inner area withstands the internal pressure, it is thus ensured that an oil flow into the outer area, for example into the sea, is prevented.
  • the advantage of this method is that it is particularly uncomplicated to perform.
  • the number of necessary components is kept to a minimum, which favors a quick and cost-effective installation and, moreover, is less susceptible to error.
  • a particularly advantageous method further provides that the foundation body is connected by means of at least one anchoring element, preferably by means of a plurality of anchoring elements, in a force-transmitting manner to the ground.
  • Page 4 of 23
  • a force-transmitting connection between the bell element and the foundation body is particularly simple if the bell element is connected to the foundation body by means of at least one bolt, preferably a bolt, preferably by means of a plurality of bolts.
  • Such bolts should already be connected in advance with the foundation body, so that a connection of the bell element and the foundation body can be implemented via prefabricated holes in the bell element.
  • said holes must be placed only on the bolts of the foundation body, so that a positive connection between the bell element and the foundation body is particularly easy to produce.
  • Such a method step is particularly quick and easy to carry out.
  • a further advantageous embodiment of the method according to the invention provides that at least one medium between the inner region and the outer region of the bell element via at least one conduit element which penetrates the bell element, is passed.
  • a main object of a device described in the introduction is to seal a defective well so that no oil can escape from the interior of the bell element, it is particularly advantageous if, while maintaining a sealing function is still a possibility - usually flowable - with the media To replace interior of the bell element.
  • line elements of the type described above it is possible, for example, to guide accumulated oil in the inner region of the bell element to another location, for example a tank vessel or the like, and thus to reduce internal pressure in the interior area.
  • materials should be directed from the outside to the interior. This is also possible via described line elements.
  • a gap region between the bell element and the foundation body should primarily be sealed. This should preferably be done by means of a pasty or elastomeric sealant. Sealants of this type are well known in many variants, so that with a deal with the same already many experiences could be collected. The use of such a sealant accordingly promises a low risk with high efficiency.
  • a shuttering element which is preferably a part of the foundation body, by means of fins on the Reason is positioned so that an alignment plane of the formwork element is oriented approximately horizontally.
  • the lamellae are individual elements arranged on the formwork element, which elements are arranged displaceably on the formwork element. If the formwork element is held approximately horizontally in a floating position, for example, by means of a crane over a ground, the fins can be temporarily released and moved relative to the formwork element until they respectively hit the ground. Subsequently, they are again connected to the formwork element in a force-transmitting manner, so that the latter is consequently on the slats, which have adapted in detail to the respective given relief of the ground.
  • the formwork element Once the formwork element has been fixed in this manner in approximately a horizontal orientation, can be filled in an interior of the formwork element, which is spatially separated by an environment from the environment below, for example, concrete. After hardening of the concrete, the founding body is completed and finally has a desired horizontal orientation.
  • This method step should be used especially when it is not or only very difficult to produce an approximately horizontal alignment of the formwork element in the run-up to an elevation of the formwork element on the ground by means of the lamellae. This may for example be the case when used underwater, in which a flow of water does not allow the formwork element to be aligned horizontally solely by a suspension on a loader crane.
  • a statically determined elevation of the formwork element on the ground by means of the leveling elements enables the user to precisely align the formwork element by means of independent adjustments of the leveling elements.
  • One way to carry out the method according to the invention is to install the foundation body on or in the ground before the bell element is connected to the foundation body in a force-transmitting manner.
  • a sequence of the method steps for enclosing a borehole in this order a precise adaptation of the foundation body to the respective local conditions in the environment of the respective borehole or of the respective boreholes is possible.
  • a foundation body made of concrete to enclose the respective holes accurately.
  • an adaptation of the foundation body to the respectively given relief of the ground by an installation of the foundation body on site is particularly easy to reach.
  • the underlying object is further achieved by a further development of a device of the type described above, that corresponding contact surfaces of the foundation body on the one hand and the bell element on the other hand are pressure-tight coupled to each other or coupled.
  • a pressure-tight separation of the inner region of the bell element from the outer region is particularly easy to carry out.
  • oil leaking from one or more wells is trapped in the interior. The latter is thus separated from the outer region at least by the foundation body and the bell element, optionally by the base, the foundation body and the bell element, depending on whether or not the foundation body completely covers the ground locally around the borehole.
  • the foundation body of the device should be connected to the ground via at least one anchoring element, preferably via a plurality of anchoring elements.
  • the bell element should by means of at least one bolt, preferably one
  • Bolt preferably by means of a plurality of bolts, be connected to the foundation body.
  • the device should also be such that at least one medium between the inner region and the outer region of the device by at least one conduit element which penetrates the bell element, is conductive.
  • the inventive method step of conducting at least one medium between the inner and the outer region is particularly simple to carry out by means of such a device.
  • the device is also configured particularly advantageously according to the corresponding method step, as long as a gap region between the corresponding contact surfaces is sealed by means of a pasty or elastomeric sealant.
  • a shutter element which is a component of the foundation body, should have at least three leveling elements by means of which an alignment plane of the shuttering element can be oriented approximately horizontally.
  • a formwork element which is a component of the foundation body may have at least one lamella, preferably a plurality of lamellae, which are movably mounted in a direction approximately parallel to a longitudinal axis of a borehole of the borehole relative to the formwork element is.
  • the bell element is particularly advantageous if it has the shape of a hemisphere.
  • a hemisphere is ideal for resisting pressure in its interior. Furthermore, a uniform geometry of a lower edge of a hemispherical bell element favors easy installation and fixation on a foundation body.
  • the device according to the invention can then be considered to be particularly advantageous when the corresponding contact surfaces of the foundation body on the one hand and the bell element on the other hand enclose the borehole in each case.
  • a further particularly advantageous embodiment of the device provides that the bell element has a removable cover with which a breakthrough in the bell element can be closed in a pressure-tight manner.
  • a removable cover for a user of the device according to the invention is always the ability to have access to the interior of the bell element.
  • an exchange of a cover should be made to eliminate damage or the like.
  • the device in the case of a preventive enclosure of a borehole using the method according to the invention by means of a device according to the invention, the device can be installed almost completely, so that only said cover element is missing for a tight closure of the interior area of the bell element. In the event of an accident and subsequent leakage of the borehole, this would be sealable only by retrofitting the removable cover.
  • the advantage of such a procedure is a very short time, so that an impending pollution is quickly and effectively averted.
  • the inner region of the bell element is subdivided into at least two compartments, preferably two compartments each being fluidically connectable to one another by means of a pressure relief valve.
  • the sections of the bell element should preferably be designed so that they can be flowed through successively starting from the borehole or the pipe leading out of the borehole for guiding the medium to be conveyed (typically oil). This means that in case of a possible leak of the borehole the unintentionally leaking Page 10 of 23
  • oil can pass exclusively into a first compartment of the bell element arranged around the borehole and a transfer into a second compartment is possible solely by means of the pressure relief valve.
  • This pressure relief valve should open at a pre-defined pressure level and advantageously connect the first department exclusively to the second department while any further departments provided remain unused for the time being. Due to the possibility of evading the conveyed medium in the second department, there is a pressure relief in the first section of the bell element. Finally, a further pressure increase in the first and the second section above a defined level triggers finally another pressure relief valve and connects the first two departments with another department, whereby a pressure drop is achieved in the first two departments.
  • Partition walls which spatially separate the individual compartments in the interior of the bell element, should advantageously be supported against each other or against a wall of the bell element by means of support rods in order to be able to remove the differential forces in the event of any pressure differences between the two sides of the partition walls.
  • Fig. 7 another device according to the invention.
  • a device 1 shown in FIG. 1 for enclosing a borehole 3 located in a base 2 has a foundation body 4 in the form of a ring foundation, on which a bell element 5 is fixed in a force-transmitting manner, which has a shape of a hemisphere.
  • a compound of the foundation body 4 and the bell element 5 bolts 6 are used, which are introduced through a foot portion 7 of the bell element 5 into the foundation body 4.
  • a gap region 16 between contact surfaces of the bell element 5 and the foundation body 4 is pressure-tightly interconnected.
  • the bell element 5 encloses an inner region 17 of the device 1.
  • the bell element 5, the foundation body 4 and the bolts 6 are therefore interpreted according to an expected pressure load. Furthermore, the sealant used is chosen according to the expected load.
  • the device 1 shown in FIG. 1 can be used both under water - for example in the deep-sea area - and above water.
  • FIG. 2 Another device 1 'according to the invention is shown in FIG. It differs from the device 1 only by an opening 9 in a bell element 5 ', which is used instead of a bell element 5.
  • the opening 9 in the bell element 5 ' can be closed pressure-tight by means of a cover 10 (not shown in FIG. 2). Consequently, using a device 1 'according to the invention, it is possible to already preventively build the foundation body 4 and the bell element 5' and install it on the ground 2 and, in the event of an accident involving damage to the borehole 3, only the cover 10 to put on the opening 9 of the bell element 5 'and to connect with this in a force-transmitting manner.
  • a further device 1 "according to the invention shown in a view is in a state of construction
  • the ground 2 on which the device 1" is to be set up has a pronounced relief, so that there is no plane contact surface for the device Unevenness of such a type can be compensated for by means of the foundation body 4.
  • a bell element 5 "of the device 1" fixed to a formwork element 21 is provided by means of lamellae 1 1 on the base 2. These lamellae 1 1 are connected to the formwork element 21 in such a way that they can be moved and fixed relative to the latter 2.
  • the formwork element 21 may be positioned in a floating position at a certain height above the ground 2.
  • the slats 1 1 should be in a starting position, in which a lower end face 12 of the slats 1 1 is located approximately at a height of an alignment plane 24 of the formwork element 21.
  • a fixation of the slats 1 1 is released, so that they are movable relative to the formwork element 21 in a direction approximately perpendicular to Figure 4 on the ground 2.
  • the bell element 5 "can consequently stand together with the shuttering element 21 on the base 2 only by the slats 11 and simultaneously maintain a desired orientation 13 of the
  • the lamella 1 1 serve in the following as a component of the formwork element 21, which in turn represents a component of the foundation body 4. In the sketched embodiment, this is a by a Concrete formed, which can be introduced by means of a supply line 14 in the formwork element 21. After curing of the concrete of the foundation body 4 is completed.
  • the device 1 is shown in a finished state in a section in Figure 5.
  • the bell element 5 "by means of Screw bolt 6 connected to the formwork element 21 in a force-transmitting manner.
  • a connection of the bell element 5 "and of the formwork element 21 or of the foundation body 4 is pressure-tight, in that a sealing agent is introduced into the gap area 16 between the foundation body 4 and the bell element 5".
  • the bell element 5 in turn includes the interior space 17. Further, it has a cover 10 'which is pierced by a tube 19 which is connected to the borehole 3 and thus in comparison to the cover 10, as shown for example in FIG In the example shown, the borehole 3 is not damaged
  • the cover 10 ' is connected in a force-transmitting manner to the bell element 5 "by means of threaded bolts. In the event of an accident involving damage to the wellbore 3 and / or the tube 19, the cover 10 'is easily interchangeable with a cover 10 without an opening.
  • the borehole 3 is thus quickly and easily closed.
  • these leveling rods 20 as well as the slats 1 1 are still in a starting position.
  • the formwork element 21 is in a fixed position shown in Figure 6b.
  • the leveling rods 20 are such that they can be varied along their longitudinal axis in their length.
  • an orientation of the alignment plane 24 of the formwork element 21 can thus be aligned approximately horizontally. This orientation can be controlled for example by means of a dragonfly or the like. If the alignment plane 24 is correctly oriented, the leveling rods 20 are fixed so that their length is kept constant.
  • the formwork element 21 is now firmly on the bottom 2 and due to its statically determined storage by means of the three leveling rods 20 is not prone to tilting or other movements. Accordingly, as shown in FIG. 6c, the lamellas 11 which are arranged on the shuttering element 21 can be loosened and drained onto the base 2 before they are fixed again to the shuttering element 21. As already described above, the lamellae 1 1, if they are completely drained to the bottom 2, together with the formwork element 21, the inner region 15, in the following, for example, concrete can be passed. A conveyor pipe for the concrete can be guided, for example, by means of the load cable 23 to the shuttering element 21. The completely finished foundation body 4 is finally formed by a hardening of the concrete. The formwork element 21 remains as part of the foundation body 4 and thus the Page 15 of 23
  • FIG. shows a device 1 "'whose inner region 17 is subdivided into a plurality of compartments 26, 27, 28.
  • the individual compartments are interconnected by means of pressure relief valves 29.
  • the device 1" "has a total of three compartments 26, 27, 28 , wherein these are arranged around the tube 19 such that starting from the tube 19, the individual compartments 26, 27, 28 can only be flowed through one behind the other. That is, in the event of leakage of the borehole 3 or the pipe 19, first the first compartment 26 disposed directly around the pipe 19 is filled with medium exiting the pipe 19.
  • the pressure relief valve 29 triggers that the first compartment 26 connects to the second compartment 27, so that the medium can flow into the second compartment 27 and flow to the second compartment 27 Relief of the pressure in the first section 26 comes.
  • the further pressure relief valve 29, which connects between the second compartment 27 and the third compartment 28, triggers as soon as the pressure of the medium in the compartments 26, 27 has risen above a defined level.
  • the individual compartments 26, 27 are each closed by means of individual covers 10 ", 10" '.
  • the covers 10 ", 10" ' have different surfaces which are exposed to the pressure in the compartments 26, 27, so that different resultant forces on the two covers 10 ", 10"' at the same prevailing pressure in the departments 26, 27 result.
  • the outer third compartment 28 is stabilized by means of individual support rods 30.
  • the support rods 30 typically do not form a closed ring around the second compartment 27, but such an embodiment is also conceivable.
  • FIG. shows the already explained above device 1 ', which here in addition to, for example, according to Figure 3 has a supply line 14 which penetrates the bell element 5'.
  • a supply line 14 By means of the supply line 14 is an introduction of a sealing material, typically Page 16 of 23
  • a pressure relief valve 32 is provided for safety.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Geology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Fluid Mechanics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
  • Foundations (AREA)
  • Piles And Underground Anchors (AREA)

Abstract

L'invention concerne un procédé pour enfermer au moins un trou de forage (3) situé dans un sol (2), le procédé comprenant les étape suivantes: a) le trou de forage (3) est bordé par un corps de fondation (4) qui l'entoure et qui est disposé dans ou sur le sol (2). b) Un élément en forme de cloche (5, 5', 5") est relié au corps de fondation (4) de manière à transmettre la force de sorte qu'une zone intérieure (17) de l'élément en forme de cloche (5, 5', 5") est séparé spatialement d'une zone extérieure. Pour effectuer rapidement, sûrement, à peu de frais et simplement une installation d'un tel dispositif, l'étape suivante est proposée en complément : c) La zone intérieure (17) est séparée de manière étanche à la pression de la zone extérieure. L'invention concerne également un dispositif (1, 1 ', 1 ", 1 "') qui correspond au procédé et au moyen duquel le procédé selon l'invention peut être mis en œuvre de manière particulièrement simple.
PCT/EP2012/056570 2011-04-12 2012-04-11 Procédé et dispositif pour enfermer un trou de forage WO2012140076A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102011001987A DE102011001987A1 (de) 2011-04-12 2011-04-12 Verfahren und Vorrichtung zum Einschließen eines Bohrlochs
DE102011001987.1 2011-04-12

Publications (2)

Publication Number Publication Date
WO2012140076A2 true WO2012140076A2 (fr) 2012-10-18
WO2012140076A3 WO2012140076A3 (fr) 2013-08-29

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Application Number Title Priority Date Filing Date
PCT/EP2012/056570 WO2012140076A2 (fr) 2011-04-12 2012-04-11 Procédé et dispositif pour enfermer un trou de forage

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WO (1) WO2012140076A2 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10344551B2 (en) * 2014-11-26 2019-07-09 Statoil Petroleum As Subsea equipment-protection apparatus

Families Citing this family (1)

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Publication number Priority date Publication date Assignee Title
US8986548B2 (en) * 2011-06-06 2015-03-24 Thomas T. K. Zung Oil containment recovery dome

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US2532341A (en) 1947-03-20 1950-12-05 Shannon Joseph Cap for marine oil wells
US2563341A (en) 1949-11-30 1951-08-07 Gen Motors Corp Humidity control
DE202010009170U1 (de) 2010-06-17 2010-12-02 Merlaku, Kastriot Vorrichtung, die eine Ölbohrung versiegeln soll

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US4323118A (en) * 1980-02-04 1982-04-06 Bergmann Conrad E Apparatus for controlling and preventing oil blowouts
NO830639L (no) * 1983-02-23 1984-08-24 Jan Egil Floeysvik Innretning for avgrensning og styring av en fluidumstroem fra en olje/gasskilde, saerlig ved en ukontrollert utblaasning paa havbunnen
US4568220A (en) * 1984-03-07 1986-02-04 Hickey John J Capping and/or controlling undersea oil or gas well blowout
US5131474A (en) * 1991-06-18 1992-07-21 Hunter Iii Henry L Mobile combined oxygen-free work compartment and fire extinguisher for oil well blowouts
DE4126540A1 (de) * 1991-08-10 1993-02-11 Helmut Bauhof Vorrichtung zur loeschung und abdichtung einer brennenden oelquelle
US5247999A (en) * 1991-09-25 1993-09-28 Fowler John T Oil wellhead fire extinguishing apparatus having adjustable support feet and labyrinth module
FR2795109B1 (fr) * 1999-06-18 2001-09-07 Geocean Solmarine Procede et dispositif de detection, localisation et captage de source d'eau douce en mer
DE102010020803A1 (de) * 2010-05-18 2011-11-24 Gerd Hörmansdörfer Verfahren zur Beherrschung des unkontrollierten Austritts von Erdöl und/oder Erdgas aus beschädigten geotechnischen Bohrungen

Patent Citations (3)

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Publication number Priority date Publication date Assignee Title
US2532341A (en) 1947-03-20 1950-12-05 Shannon Joseph Cap for marine oil wells
US2563341A (en) 1949-11-30 1951-08-07 Gen Motors Corp Humidity control
DE202010009170U1 (de) 2010-06-17 2010-12-02 Merlaku, Kastriot Vorrichtung, die eine Ölbohrung versiegeln soll

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10344551B2 (en) * 2014-11-26 2019-07-09 Statoil Petroleum As Subsea equipment-protection apparatus

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DE102011001987A1 (de) 2012-10-18
WO2012140076A3 (fr) 2013-08-29

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