EP3827156B1 - Dispositif de fermeture de trou de forage - Google Patents
Dispositif de fermeture de trou de forage Download PDFInfo
- Publication number
- EP3827156B1 EP3827156B1 EP19756105.3A EP19756105A EP3827156B1 EP 3827156 B1 EP3827156 B1 EP 3827156B1 EP 19756105 A EP19756105 A EP 19756105A EP 3827156 B1 EP3827156 B1 EP 3827156B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- sleeve
- closure device
- borehole
- drilling
- borehole closure
- 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.)
- Active
Links
- 238000007789 sealing Methods 0.000 title description 7
- 238000005553 drilling Methods 0.000 claims description 52
- 229920001971 elastomer Polymers 0.000 claims description 50
- 239000000806 elastomer Substances 0.000 claims description 49
- 239000012530 fluid Substances 0.000 claims description 46
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 19
- 125000006850 spacer group Chemical group 0.000 claims description 12
- 238000000034 method Methods 0.000 claims description 10
- 238000006073 displacement reaction Methods 0.000 claims description 8
- 238000002347 injection Methods 0.000 claims description 3
- 239000007924 injection Substances 0.000 claims description 3
- 230000006835 compression Effects 0.000 description 10
- 238000007906 compression Methods 0.000 description 10
- 238000005520 cutting process Methods 0.000 description 10
- 239000003673 groundwater Substances 0.000 description 7
- 239000011435 rock Substances 0.000 description 7
- 238000003825 pressing Methods 0.000 description 6
- 239000002689 soil Substances 0.000 description 6
- 230000007423 decrease Effects 0.000 description 5
- 241000209035 Ilex Species 0.000 description 4
- 238000011010 flushing procedure Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 239000004568 cement Substances 0.000 description 3
- 239000000654 additive Substances 0.000 description 2
- 229910000278 bentonite Inorganic materials 0.000 description 2
- 239000000440 bentonite Substances 0.000 description 2
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 230000032258 transport Effects 0.000 description 2
- FGRBYDKOBBBPOI-UHFFFAOYSA-N 10,10-dioxo-2-[4-(N-phenylanilino)phenyl]thioxanthen-9-one Chemical compound O=C1c2ccccc2S(=O)(=O)c2ccc(cc12)-c1ccc(cc1)N(c1ccccc1)c1ccccc1 FGRBYDKOBBBPOI-UHFFFAOYSA-N 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 239000007900 aqueous suspension Substances 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 239000013013 elastic material Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
Images
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
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/12—Packers; Plugs
- E21B33/128—Packers; Plugs with a member expanded radially by axial pressure
Definitions
- the invention relates to a borehole closure for carrying out bores in a borehole while controlling the discharge of water from the borehole.
- Boreholes below the water table are mostly carried out in outer pipes. Down the hole hammers are often used in this context Use, especially when drilling has to be carried out in relatively hard rock. Flushing bores without a down-the-hole hammer can only be carried out in light soils. The holes are often carried out as double-headed holes.
- the object was to provide a borehole closure with which on the one hand the space between the drill pipe and the outer pipe can be effectively sealed against water pressing from below or from other directions, but which on the other hand allows flush drilling methods in which the supplied Fluid continuously transports the cuttings out of the borehole.
- an elastomer element fixed on the outside of the base pipe is designed in such a way that it can seal the space between the borehole closure device belonging to the drill pipe and the outer pipe.
- the elastomer element is normally arranged in a radially circumferential manner around the borehole closure device, in particular around the base pipe. It can have the shape of a ring cylinder or a tubular sleeve.
- the elastomer element can, however, be stretched in such a way that there is no longer any seal with respect to the outer tube, and a fluid, in particular water, can penetrate to the outside through the space.
- the elastomer element can in any case be connected to the sleeve at one axial end, preferably directly, whereby the displacement of the sleeve in the longitudinal direction against the spring force causes the elastomer element to stretch.
- the elastomer element can also rest against only one section of the sleeve, so that the longitudinal movement of the sleeve allows the elastomer element to expand in the longitudinal direction, with the radial expansion decreasing at the same time.
- the elastomer element can for example be made of rubber or another elastic material. The stiffness of the elastomer element can be adjusted as a function of the pressures used by suitable selection of shape and material.
- the term elastomer is to be interpreted broadly; in principle, materials are suitable that allow the elastomer element to be deformed in such a way that when it is compressed in the longitudinal direction, there is a radial expansion and when it is stretched in the longitudinal direction, the radial expansion is reduced. A certain deformability is necessary for this.
- the elastomer element is expanded and seals the space between the borehole closure device and the outer pipe.
- the expansion and extension of the drill string can take place.
- the leakage of groundwater or other pressing water is effectively prevented in this way.
- the entire borehole closure device is pressurized, ie fluid flows through the interior of the base pipe in the drilling direction in order to take the comminuted cuttings (cuttings) with it through the outer pipe during drilling and to convey out.
- the fluid passes through the radial passages in the wall of the base tube into the piston space between the outside of the base tube and the inside of the sleeve.
- the pressure of the fluid causes the sleeve to be displaced in the longitudinal direction, the pressure exerted by the fluid acting against the spring force of the spring. Since the sleeve is at the same time in connection with the elastomer element or rests against it, this is stretched or is given space for stretching in the longitudinal direction.
- a drilling device is from US Pat US 7,314,092 B2 known.
- An elastomer element is also present here, which is able to produce a seal with respect to an outer pipe, but the elastomer element is expanded by the weight of the drill rod placed on the outer pipe.
- the invention allows the expansion of the elastomer element to be deliberately controlled by supplying a fluid into the piston space, in order in this way to prevent the uncontrolled leakage of groundwater.
- the sleeve moves in the opposite direction to the drilling direction and accordingly ensures that the elastomer element is stretched in the same direction.
- the sleeve can also be shifted in the opposite direction, i. H. Drilling direction, conceivable with appropriate stretching of the elastomer element.
- the piston chamber is preferably sealed in the longitudinal direction by means of groove sealing rings.
- the groove sealing ring should be fixed to the sleeve at least in one direction in such a way that longitudinal displacement relative to the base tube is possible, while at the same time sealing the piston chamber is ensured.
- the longitudinally displaceable, spring-side delimitation of the piston chamber normally strikes the spring directly or indirectly, ie when the piston chamber is pressurized supplied fluid, a force is exerted by the delimitation of the piston chamber on the spring, which compresses it; If, on the other hand, the pressure in the piston chamber decreases, the relaxation of the spring ensures that the piston chamber becomes smaller again in that the spring presses against the delimitation and moves the sleeve in the longitudinal direction.
- the fluid is usually a water-based fluid, it also being possible to use water with certain additives, for example bentonite. Together with the water, the rock and the earth in the space between the drill hole closure device and the outer pipe surrounding it are transported out of the drill hole at the same time. It is also possible to use gases as the fluid, for example air. The use of a mixture of air, water and a cement water suspension as the fluid is particularly preferred.
- the fluid which preferably contains water, is used for cooling during drilling and for discharging the loosened cuttings.
- a fluid is thus pumped through the interior of the base pipe to the drill, which ensures that the comminuted cuttings are flushed out of the borehole through the outer pipe.
- the fluid takes on a further role and passes through the passages in the wall of the base tube into the piston space between the outside of the base tube and the inside of the sleeve in order to use the pressure built up here to ensure that the sleeve moves in the longitudinal direction the spring force moves and the elastomer element expands in the process. If drilling is interrupted, the fluid supply is reduced or stopped.
- the release of the fluid pressure ensures that the spring expands and that the fluid is pressed out of the piston chamber and the sleeve moves in the opposite direction, as a result of which the elastomer element expands radially and seals the space between the borehole closure device and the outer pipe. Discharging the cuttings is naturally not necessary in this state due to the lack of a drilling, but at the same time the undesired and uncontrolled leakage of groundwater is effectively prevented, especially when drilling below the groundwater level. The same applies to horizontal or diagonal holes if there is pressing water.
- the drill can be a hydraulically driven drill.
- Preferred drills are known in the prior art as down-the-hole hammers, which are used in particular for bores in solid rock and have an impact mechanism for generating a striking movement.
- the invention can also be practiced with other drills, for example on lighter soils. Examples of further drills are (lost) ram tips, possibly with spade blades.
- the invention can also be used in connection with HDI (high pressure injection process), i. H. Use jet grouting, in which a high pressure fluid is supplied that cuts open the rock or soil. A mostly cement-containing suspension can also be added in order to produce a concrete-like body. Such methods are also understood as "drilling" in accordance with the terminology used here, and an HDI injection lance as a drill.
- the drill can usefully be connected to the end of the borehole closure device on the side of the drilling direction, in particular via a closure sleeve arranged on the end of the base pipe on the side of the drilling direction.
- This closure sleeve should have a flow channel running in the longitudinal direction, which adjoins the flow channel of the base pipe, in other words is connected to the interior of the base pipe.
- the connection between the base pipe and the closure sleeve can be established, for example, in that the base pipe has a corresponding external thread and the closure sleeve has a corresponding internal thread, which can be screwed together.
- embodiments are also conceivable in which, for example, the drill is connected directly to the base pipe or the drill is a direct component of the borehole closure device.
- the elastomer element can adjoin the closure sleeve on the drilling direction side, so that the elongation in the longitudinal direction is limited by the closure sleeve.
- the borehole closure device can also have some other limitation for the elastomer element in the drilling direction.
- baffle plate in the flow path of the fluid leading to the passages, preferably on the side of the drilling direction.
- a baffle plate provides for the fact that a certain pressure has to build up before a sufficient amount of fluid passes through the radial passages into the piston space between the base tube and the sleeve in order to build up a pressure here that is high enough to move the sleeve against the spring force.
- Lower pressures, however, which are already exerted by the groundwater or other pressing water, are not sufficient to move the sleeve.
- the elastomer element accordingly remains in its expanded configuration and closes the space between the borehole closure device and the outer pipe.
- the baffle regulates the desired overpressure and is preferably exchangeable, ie the desired overpressure, from which a displacement of the sleeve and thus an opening of the space between the outer pipe and the borehole closure device takes place, can be set on site as required and conditions.
- the baffle plate can expediently be arranged in the closure sleeve.
- the closure sleeve can have an area with a smaller inner diameter in which the baffle plate is arranged. At the end of the closure sleeve on the side in the direction of drilling, this can have a receptacle for which the receptacle of the drill, for example a pin of the drill, is suitable.
- the spring which ensures that the sleeve remains in its rest position without fluid pressure and the elastomer element has an expanded shape, must be arranged in such a way that it can fulfill its role.
- a helical spring in particular a compression spring, which is loaded and compressed by the application of pressure.
- a compression spring in particular a helical compression spring, has the advantage that it can be arranged in such a way that it is sufficiently spaced from the elastomer element.
- a plate spring or a tension spring in particular a helical tension spring, is used.
- the spring in particular the compression spring, is preferably arranged in a space between the outside of the base tube and the inside of the sleeve.
- This intermediate space separated by a longitudinally displaceable spring-side delimitation of the piston space in the longitudinal direction, can adjoin the piston space which is filled by the fluid in the operating state.
- the above The mentioned spring-side delimitation of the piston chamber thus compresses the spring when the fluid flows into the piston chamber.
- the piston space is arranged behind the intermediate space as seen in the drilling direction, ie the piston space is located on the drilling direction side to the intermediate space.
- the base tube can have a step on its outside, which serves as a delimitation for the spring that is opposite to the drilling direction.
- one end of the tension spring should of course be correspondingly fixed in such a way that the application of pressure to the fluid causes the tension spring to be pulled apart.
- the outside of the base tube can have a stop which interacts with a spacer attached to the sleeve.
- the stop can, for example, be a one-part or multi-part buffer ring, which is preferably designed to run radially.
- the buffer ring in turn adjoins the piston chamber, possibly additionally separated from it by groove sealing rings which seal off the piston chamber.
- the spacer can serve as a stop for the elastomer element, either a connection, for example an adhesive connection, with the elastomer element being present, or the spacer merely limiting the longitudinal extent of the elastomer element.
- the spacer can be a radially circumferential spacer ring over the inner circumference of the sleeve, which z. B. can be fixed on the sleeve via a locking ring.
- the locking ring can be partially embedded in a radially circumferential recess on the inside of the sleeve.
- the invention also relates to a drilling device as a whole, which is composed of the borehole closing device, as described above, an outer pipe through which the borehole closing device extends, and a drill which is connected to the borehole closing device.
- the drill itself is part of the borehole closure device.
- the invention also relates to a Method for performing boreholes, in which the borehole is temporarily sealed against the escape of liquid with the borehole closure device according to the invention.
- the base tube 1 is shown in longitudinal section, the drilling direction being on the right as in the following figures, ie the drill, not shown here, is arranged on the right.
- the base tube 1 has an interior space 2 as a passage in the longitudinal direction, through which a fluid can be directed in the direction of the drill.
- the base pipe 1 has passages 3 in its wall through which the fluid can reach the outside.
- the base pipe 1 has an external thread 4, via which a screw connection with a locking sleeve is possible, a step 5 as a stop for a spring and a radially circumferential groove 6 for a first locking ring.
- the sleeve 7 of the borehole closure device according to the invention is shown in longitudinal section.
- the sleeve 7 is essentially hollow on the inside so that it can be slipped onto the base tube 1.
- the sleeve 7 also has a radially circumferential recess 8 for a groove sealing ring, a radially circumferential recess 9 for a second securing ring and a radially circumferential groove 10 for an O-ring.
- FIG 3 the base pipe 1 is shown with the sleeve 7 attached. Between the base tube 1 and the sleeve 7 there is an interspace 16 in which a helical compression spring 11 is accommodated, which adjoins the step 5 on the side facing away from the drilling direction.
- the sleeve 7 is arranged on the base tube 1 so as to be longitudinally displaceable, namely to the left in the illustration selected here, ie against the drilling direction, a spring-side delimitation 26 of the piston chamber compressing the spring 11.
- a radially circumferential O-ring 13 is also located between the sleeve 7 and the base tube 1.
- FIG 4 the sleeve 7 is shown again in the state slipped onto the base tube 1, but the radially circumferential baffle ring 15 is also shown here, which is fixed to the base tube 1 with the aid of a first securing ring 17.
- the buffer ring 15 can be made up of several parts and sealed by further groove sealing rings 27. This results in a piston chamber 14 which is in communication with the passages 3 and is closed in the longitudinal direction, however, by supplying a fluid through the passages 3 under pressure into the piston chamber 14, a longitudinal displacement of the sleeve 7 on the base tube 1 against the Drilling direction (to the left in the selected representation) is possible.
- the spring 11 is compressed by the spring-side delimitation 26 of the piston chamber 14.
- This movement is limited by a spacer 18 which is fixed to the sleeve 7 by means of a second securing ring 19 and which strikes the buffer ring 15 when the sleeve 7 is displaced at the maximum length.
- the spacer 18 and the second securing ring 19 are also arranged radially circumferentially.
- Figure 5 shows the same representation as Figure 4 , but in a pressurized state. It can be seen that the piston chamber 14 has become significantly larger and the sleeve 7 has shifted to the left, the spring 1 being compressed. Since the spacer 18 is connected to the sleeve 7, this also moves against the drilling direction.
- closure sleeve 20 is shown in longitudinal section. This has an internal thread 21 which can be screwed to the external thread 4 on the base tube 1.
- a baffle plate 22 is arranged in the closure sleeve 20, which regulates the desired overpressure and, if necessary, can be changed as required.
- the closure sleeve 20 has a receptacle 23 for the drill.
- FIG. 7 the entire system is shown in a depressurized state.
- the borehole closure device is located within an outer tube 25.
- the elastomer element 24 adjoining the spacer 18 and possibly connected to it, which adjoins the closure sleeve 20 in the direction of drilling.
- the elastomer element 24 is designed so as to be radially circumferential and has the shape of an annular cylinder. In the unpressurized state, the elastomer element 24 is radial therefore expands and seals the space 28 between the wellbore closure device and the outer pipe 25. In other words, no liquid indicated by the arrows, for example groundwater, can escape through the space 28.
- Figure 8 the situation is shown in a pressurized state.
- a fluid is guided in the direction of the arrow through the interior space 2 of the base tube 1 to the drill, not shown here, in order to cool it. Furthermore, the fluid ensures that the cuttings produced are discharged.
- the fluid passes through the passages 3 into the piston chamber 14, the pressure being regulated via the baffle plate 22. Due to the pressurization of the piston chamber 14, the sleeve 7 moves against the drilling direction, ie to the left in the illustration selected here, and compresses the spring 11. To the same extent, the spacer 18 also moves against the drilling direction, causing the elastomer element 24 to move longitudinally stretches and at the same time its radial extent decreases.
- the intermediate space 28 between the outer pipe 25 and the borehole closure device is released, ie the fluid can flow through the outer pipe 25 and discharge cuttings.
- the fluid supply is interrupted, the compression spring 11 expands and moves the sleeve 7 again in the drilling direction (to the right), the spacer 18 being carried along and ensuring a radial expansion of the elastomer element 24.
- the space 28 between the borehole closure device and the outer pipe 25 is accordingly sealed again.
- FIGS Figures 9 and 10 An alternative embodiment, which differs with regard to the elastomer element 24, is shown in FIGS Figures 9 and 10 shown, where Fig. 9 the pressureless state, Fig. 10 however, represents the pressurized state.
- Fig. 9 one can see the elastomer element 24, which is also here radially circumferential and which is connected to the closure sleeve 20 on the drilling direction side and to the sleeve 7 on the side facing away from the drilling direction.
- the elastomer element 24 has the shape of a tubular sleeve, the tubular sleeve being compressed in the unpressurized state in such a way that the gap 28 between the borehole closure device and the outer pipe 25 is sealed.
- the elastomer element 24 is connected to the sleeve 7 via a driver ring 29, so that the axial Movement of the sleeve 7 is transmitted to the elastomer element 24.
- the elastomer element 24 is connected to the locking sleeve 20 via a further ring 30, for example designed as a half-shell.
- the elastomer element 24 does not lie completely on the inside on the base tube 1, but rather arches radially outwards when compressed in the longitudinal direction in order to bring about the seal.
- Fig. 10 the state is shown when the pressure in the piston chamber 14 increases in that fluid is supplied through the passages 3.
- the increase in pressure causes the sleeve 7 to be displaced counter to the drilling direction against the force exerted by the spring 11. Since the sleeve 7 is connected to the elastomer element 24 via the driver ring 29, the elastomer element 24 is stretched in the longitudinal direction with a simultaneous decrease in radial expansion and the passage 28 between the borehole closure device and the outer pipe 25 is opened.
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- 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)
- Earth Drilling (AREA)
Claims (15)
- Dispositif de fermeture de trou de forage destiné à exécuter des forages dans un trou de forage en contrôlant la sortie d'eau hors du trou de forage, comprenant un tube de base (1) et une enveloppe (7), qui se trouve de manière déplaçable longitudinalement sur le côté extérieur du tube de base (1), un ressort (11) étant disposé entre le tube de base (1) et l'enveloppe (7) de telle manière qu'un déplacement longitudinal de l'enveloppe (7) par rapport au tube de base (1) est possible dans une des directions longitudinales uniquement en surmontant la force du ressort, un élément en élastomère (24) expansible radialement étant fixé sur le côté extérieur du dispositif de fermeture de trou de forage de telle manière qu'il est axialement en liaison avec l'enveloppe (7) ou adjacent à celle-ci, l'élément en élastomère (24) étant apte à entraîner une étanchéification par rapport à un tube extérieur (25) disposé autour du dispositif de fermeture de trou de forage et la paroi du tube de base (1) ayant d'un ou de plusieurs passages (3) radiaux,
caractérisé en ce que
un déplacement de l'enveloppe (7) dans la direction longitudinale à l'encontre de la force de ressort provoque une diminution de l'expansion radiale de l'élément en élastomère (24) et un déplacement de l'enveloppe (7) dans la direction longitudinale correspondant à la force de ressort provoque une expansion radiale de l'élément en élastomère (24), qui entraîne une étanchéification par rapport au tube extérieur (25) disposé autour du dispositif de fermeture de trou de forage, et les passages (3) radiaux débouchent dans une chambre de piston (14) située entre le côté extérieur du tube de base (1) et le côté intérieur de l'enveloppe (7), la chambre de piston (14) étant fermée des deux côtés dans la direction longitudinale, et le déplacement de l'enveloppe (7) dans la direction longitudinale à l'encontre de la force de ressort pouvant être provoqué par le fait qu'un fluide alimenté pendant le forage parvient dans la chambre de piston (14) située entre le côté extérieur du tube de base (1) et le côté intérieur de l'enveloppe (7). - Dispositif de fermeture de trou de forage selon la revendication 1, caractérisé en ce que le fluide contient de l'eau.
- Dispositif de fermeture de trou de forage selon la revendication 1 ou 2, caractérisé en ce qu'un trépan peut être raccordé à l'extrémité côté direction de forage du dispositif de fermeture de trou de forage.
- Dispositif de fermeture de trou de forage selon l'une des revendications 1 à 3, caractérisé en ce que le trépan est un marteau fond-de-trou, un sabot de pointe perdu ou une ou plusieurs buses d'injection à haute pression.
- Dispositif de fermeture de trou de forage selon l'une des revendications 2 à 4, caractérisé en ce que le trépan peut être raccordé par le biais d'un manchon de fermeture (20) disposé sur l'extrémité côté direction de forage du tube de base (1), le manchon de fermeture (20) comportant un conduit d'écoulement s'étendant dans la direction longitudinale, qui se raccorde au conduit d'écoulement (2) du tube de base (1).
- Dispositif de fermeture de trou de forage selon l'une des revendications 1 à 5, caractérisé en ce qu'une plaque de retenue (22), qui contrôle la pression à laquelle le fluide peut s'écouler à travers les passages (3) radiaux et agir sur le ressort (11), est disposé dans le trajet d'écoulement du fluide menant aux passages (3) radiaux, de préférence côté direction de forage.
- Dispositif de fermeture de trou de forage selon la revendication 6, caractérisé en ce que la plaque de retenue (22) est disposé dans le manchon de fermeture (20).
- Dispositif de fermeture de trou de forage selon l'une des revendications 5 à 7, caractérisé en ce que le tube de base (1) dispose, sur son extrémité côté direction de forage, d'un filetage extérieur (4) et le manchon de fermeture (20) d'un filetage intérieur (21), par le biais duquel le manchon de fermeture (20) peut être raccordé au tube de base (1).
- Dispositif de fermeture de trou de forage selon l'une des revendications 6 à 8, caractérisée en ce que la plaque de retenue (22) est remplaçable.
- Dispositif de fermeture de trou de forage selon l'une des revendications 1 à 9, caractérisé en ce que le ressort (11) est disposé dans un espace intermédiaire (16) entre le côté extérieur du tube de base (1) et le côté intérieur de l'enveloppe (7).
- Dispositif de fermeture de trou de forage selon la revendication 10, caractérisé en ce que la chambre de piston (14) est disposée, en regardant dans la direction de forage, derrière l'espace intermédiaire (16).
- Dispositif de fermeture de trou de forage selon l'une des revendications 1 à 11, caractérisé en ce que le côté extérieur du tube de base (1) dispose d'une butée (15), qui coopère avec une pièce d'écartement (18) montée sur l'enveloppe (7) et limite le déplacement longitudinal de l'enveloppe (7).
- Dispositif de fermeture de trou de forage selon l'une des revendications 1 à 12, caractérisé en ce que le tube de base (1) dispose, sur son côté extérieur, d'au moins un gradin (5), qui sert de limitation opposée à la direction de forage pour le ressort (11).
- Dispositif de forage comprenant un dispositif de fermeture de trou de forage selon l'une des revendications 1 à 13, un tube extérieur (25) et un trépan.
- Procédé d'exécution de forages, caractérisé en ce que le trou de forage est temporairement étanchéifié contre la sortie de liquide avec un dispositif de fermeture de trou de forage selon l'une des revendications 1 à 13.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102018118121.3A DE102018118121A1 (de) | 2018-07-26 | 2018-07-26 | Bohrlochverschlussvorrichtung |
PCT/EP2019/070023 WO2020021002A1 (fr) | 2018-07-26 | 2019-07-25 | Dispositif de fermeture de trou de forage |
Publications (3)
Publication Number | Publication Date |
---|---|
EP3827156A1 EP3827156A1 (fr) | 2021-06-02 |
EP3827156B1 true EP3827156B1 (fr) | 2021-12-08 |
EP3827156B8 EP3827156B8 (fr) | 2022-01-12 |
Family
ID=67688722
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19756105.3A Active EP3827156B8 (fr) | 2018-07-26 | 2019-07-25 | Dispositif de fermeture de trou de forage |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP3827156B8 (fr) |
DE (1) | DE102018118121A1 (fr) |
WO (1) | WO2020021002A1 (fr) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN113236178B (zh) * | 2021-07-12 | 2021-09-17 | 山东柏源技术有限公司 | 一种耐高温耐承压的石油钻采用封隔器 |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2335025A (en) * | 1941-10-27 | 1943-11-23 | Frank A Reed | Oil well packer |
DE3407342C2 (de) * | 1984-02-29 | 1986-07-10 | Ernst 4620 Castrop-Rauxel Risse | Bohrlochverschluß |
GB0211601D0 (en) * | 2002-05-21 | 2002-06-26 | Sps Afos Group Ltd | Improved packer |
US20080110643A1 (en) * | 2006-11-09 | 2008-05-15 | Baker Hughes Incorporated | Large bore packer and methods of setting same |
-
2018
- 2018-07-26 DE DE102018118121.3A patent/DE102018118121A1/de not_active Withdrawn
-
2019
- 2019-07-25 WO PCT/EP2019/070023 patent/WO2020021002A1/fr active Application Filing
- 2019-07-25 EP EP19756105.3A patent/EP3827156B8/fr active Active
Also Published As
Publication number | Publication date |
---|---|
WO2020021002A1 (fr) | 2020-01-30 |
DE102018118121A1 (de) | 2020-01-30 |
EP3827156A1 (fr) | 2021-06-02 |
EP3827156B8 (fr) | 2022-01-12 |
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