EP3507449A1 - Blowout-preventer stack - Google Patents
Blowout-preventer stackInfo
- Publication number
- EP3507449A1 EP3507449A1 EP17768036.0A EP17768036A EP3507449A1 EP 3507449 A1 EP3507449 A1 EP 3507449A1 EP 17768036 A EP17768036 A EP 17768036A EP 3507449 A1 EP3507449 A1 EP 3507449A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- blowout preventer
- kinetic energy
- hydraulic pump
- hydraulic
- coupled
- 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.)
- Withdrawn
Links
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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
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/02—Surface sealing or packing
- E21B33/03—Well heads; Setting-up thereof
- E21B33/06—Blow-out preventers, i.e. apparatus closing around a drill pipe, e.g. annular blow-out preventers
-
- 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
- E21B41/00—Equipment or details not covered by groups E21B15/00 - E21B40/00
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03G—SPRING, WEIGHT, INERTIA OR LIKE MOTORS; MECHANICAL-POWER PRODUCING DEVICES OR MECHANISMS, NOT OTHERWISE PROVIDED FOR OR USING ENERGY SOURCES NOT OTHERWISE PROVIDED FOR
- F03G1/00—Spring motors
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- F03D9/00—Adaptations of wind motors for special use; Combinations of wind motors with apparatus driven thereby; Wind motors specially adapted for installation in particular locations
- F03D9/10—Combinations of wind motors with apparatus storing energy
- F03D9/12—Combinations of wind motors with apparatus storing energy storing kinetic energy, e.g. using flywheels
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E70/00—Other energy conversion or management systems reducing GHG emissions
- Y02E70/30—Systems combining energy storage with energy generation of non-fossil origin
Definitions
- the invention relates to a blowout preventer stack with at least one blowout preventer, at least one kinetic energy store, at least one hydraulic pump and at least one hydraulic actuator.
- the invention also relates to a self-sufficient energy storage and drive unit.
- boring strings of boring bars are used for deep drilling to reach subterranean oil and / or natural gas deposits.
- a drill head for grinding the soil, such as a roller bit or a diamond chisel (PDC chisel).
- the drill rods have a free inner diameter of about 51 mm (2 in) to about 1.22 m (48 in) and lengths of typically about 9, 1 m (30 ft) or about 14 m (46 ft).
- the drill string is composed of adjoining drill rods. The diameter of the drill rods of the drill string currently used for drilling depends on the drilling depth.
- the drill rods are secured together with joints, so hundreds of drill rods must be coupled together to reach depths of thousands of meters. A maximum depth of up to approx. 12,000 m below the ground can be reached.
- a concrete foundation is poured to secure the borehole. From the drill hole protrudes a piece of the drill string,
- the bore drill which is connected to a derrick or so-called derrick to hold the drill string and optionally also, e.g. with the help of a power turret (top drive) to drive.
- the bore drill s holes of varying size and depth into each of which a tube run is inserted and an annular cylindrical concrete wall is cast to secure the wellbore to hold the drill rods in place.
- the tube tours also serve to prevent falling of rock material or penetration of groundwater.
- a borehole typically consists of several pipe runs of different diameter and length. The Rohrtour carefullymesser decrease from small to greater depths.
- the drill head grinds the rock material that basically lies underneath it.
- the rock material is typically pumped along the boring bar free ring cylindrical well from the borehole end to the wellbore entrance.
- a drilling fluid typically water / oil with clay and / or barite flour
- a drilling fluid is pumped through the boring bars under high operating pressure of up to about 30,000 psi, which exits the drill head and pushes the rock material (up) to the borehole entrance.
- the rinsing liquid serves to stabilize the borehole, to cool and lubricate the drill head, to remove rock material and to remove the rock material from the borehole end.
- BOP blowout preventer
- Blowout preventer are well known in the art and are used to regulate pressure and close the wellbore in the event of a blowout.
- BOPs Blowout preventer
- the blowout preventer stacks can weigh up to 1000 t and reach heights of up to approx. 20 m.
- Blowout preventer stacks regularly have pressure lines that can create pressure on the material in the wellbore or drain pressure from the wellbore to regulate downhole pressure, and so on. to allow controlled drilling or extraction of oil and / or gas from the wellbore.
- Different types of blowout preventer stacks are used during wellbore drilling and through the wellbore.
- blowout preventers for the drilling have a service life of about 6 months after which they are subject to inspection.
- the entire blowout preventer stack must be transported from the seabed to the sea surface.
- production tree can be used.
- Reproduction crosses have much longer mission times of up to 25 years.
- the arrangement and number of blowout preventers in the blowout preventer stack determines the maximum drilling depth, since typically there is a tuned blowout preventer for each pipe diameter used in the blowout preventer stack during the drilling.
- Blowout preventers can be designed as a ram blowout preventer (ram blowout preventer) or an annular blowout preventer.
- the ram blowout preventer typically includes two opposing (rams) rams, jaws or sliders that are movable against each other.
- the Annular Blowout Preventers contain typical Schnch a ring-shaped rubber element, which may have a plurality of optionally reinforced by metal segments ring segments which are movable so that they can produce a sealing closure with their contacting surfaces.
- ram blowout preventer may serve to sever, seal or depress a boring bar of the drill string extending along the axis of the borehole into the blowout preventer to reduce the pressure of the upflowing material counteract from the borehole.
- a plurality of blowout preventer are located in the blowout preventer stack, with blowout preventer closer to the reservoir normally designed to encase and seal the drill rods and blowout preventers further apart from the deposit for severing the drill string and sealing closure the borehole are provided.
- Annular blowout preventers can be closed to varying degrees and are designed to seal the bore hole or around a boring bar.
- blowout preventer and other blowout preventer stack components are typically operated by means of hydraulic devices.
- a hydraulic fluid is pressed with pressure to the blowout preventer, which can operate the blowout preventer by shifts the jaws and / or annular rubber elements in a conventional manner or compressed, for example, on and drives.
- a typical blowout preventer stack has a Wellhead Connector at its end oriented toward the wellbore, which serves to seal the topmost tube stand (standpipe tour) that projects a short distance from the concrete floor of the wellhead, and thus the blowout preventer Stack to connect to the borehole.
- the wellhead connector typically has a larger diameter than the standpipe and collet segments disposed on an inner circumference.
- the collet segments When the wellhead connector is on the standpipe, the collet segments may be pressed against a stack connector located at the end of the standpipe to provide a sealing closure.
- the wellhead connector In the event of failure of a blowout preventer stack or if the blowout preventer stack is to be routinely replaced, the wellhead connector must be opened to remove the blowout preventer stack from the wellbore and through a new blowout preventer stack or during production can be replaced by a Christmas tree.
- the Wellhead Connector is followed by one or more pipe ram blowout preventer (Pipe Ram Blowout Preventers) for sealing different pipe diameters, respectively.
- the pipe ram blowout preventer (Pipe Ram Blowout Preventer) has two opposing jaws with recesses corresponding to the diameter of a boring bar.
- the pipe ram blowout preventer (Pipe Ram Blowout Preventers) is followed by a shear ram blowout preventer (Shear Ram Blowout Preventer), which is designed to sever a drill string of the drill string.
- the jaws (Rams) of the shearers have Blow Shear Preventers (Shear Ram Blowout Preventers) with shearing edges that can cut through boring bars in the manner of a pair of scissors.
- the shear ram blowout preventer (Shear Ram Blowout Preventer) also serves to separate the boring bar while simultaneously sealing the boring bar hole.
- the Upper Annular Blowout Preventer is connected to a Lower Marine Riser Package (LMRP).
- LMRP Lower Marine Riser Package
- the Annular Blowout Preventer is followed by a riser connector. This is intended to connect a riser sealing.
- the riser typically consists of pressure-tight steel tubes into the interior of which the drill string and irrigation fluid are routed. The inside diameter of the riser is greater than the diameter of the drill string, and typically about 533 mm (21 in).
- the lower sea riser package represents another separation plane of the blowout preventer stack when the riser from the blowout preventer stack must be disconnected. This may be the case, for example, when the drillship has to leave its position, eg due to an iceberg drifting towards the drillship. In this case, the wellbore can be sealed via the blowout preventer stack. The drillship may leave its position after the lower marine riser package (LMRP) has been disconnected and reconnect the riser to the blowout preventer stack at a later date.
- LMRP lower marine riser package
- blowout preventer stack must not fail because non-closing of the wellbore in a blowout involves significant economic and environmental costs. Therefore, there are high safety requirements for the blowout preventer stacks, in particular for drilling on the seabed. The use of several redundant supply and safety systems is therefore indispensable. Therefore, in addition to the blowout preventers, the blowout preventer stacks include kill lines and choke lines, which are provided with high pressure fill material into the wellbore and / or into the blowout hole. Preventer stack or reduce the pressure in the blowout preventer stack by draining material to allow in the event of complete or partial failure of the blowout preventer but still a successful closure of the borehole.
- US 3,667,721 presents a blowout preventer with a sealing member having an elastic sealant.
- a plurality of metallic displacement means may be slid against a spherical inner surface of a housing to bring the sealing element into a closed position, wherein the sealing element is disposed against an actuating piston.
- the sealant may be circumferentially in contact with the spherical interior surface of the housing to create a seal.
- the seal member may respond to changes in the diameter of components of a drill string by adjusting the seal member.
- US 2008/0023917 A1 shows a seal and a method for producing a seal for a blowout preventer.
- the seal has an insert of solid material disposed within an elastomeric body and at least a portion of which is selectively separated from the elastomeric body.
- an antiadhesive agent such as silicone may be applied.
- the method involves generating a finite element analysis seal model from which a stress graph is analyzed based on displacement conditions and then in the finite element At least a portion of the insert of solid material which is selectively separated from the elastomeric body is identified.
- the method further comprises making the seal having a solid material insert selectively separated from the elastomeric body. No.
- 6,719,042 B2 shows an arrangement of shearaws for shearing an oil riser.
- the arrangement comprises two displaceable jaws which are each displaceable along a different jaw axis and of which an upper cutting edge and the other has a lower cutting edge.
- the surfaces of the blades of the jaws are closely adjacent when the blades are moved towards each other for shearing the oil risers.
- a closure system is disposed in a cavity in the upper surface of the lower blade.
- the closure system includes an elastomeric seal and an actuator to seal the lower planar surface of the upper edge.
- the actuator is movable relative to the lower blade to stress the elastomeric seal.
- US 5,655,745 presents a lightweight hydraulic blowout preventer with a blowout preventer body, pivot plates and two pairs of jaws.
- the blowout Preventer body has openings for guiding a boring bar and perpendicular to these two vertically superimposed opposing guides for each pair of jaws.
- Two attachments are each fastened to the blowout preventer body with the aid of a small number of connecting pins, which are oriented perpendicular to one another and are arranged on a uniform radius or along a single line, as viewed from the jaw axis.
- the essays form guide extensions in each of which works a jaw.
- a hydraulic piston of a respective jaw is enclosed by a respective metallic sealing ring.
- the attachments are mounted on swivel plates. The connecting bolts of the attachments can be loosened and allow the attachments to pivot away from the body via the pivot plates.
- US 7,300,033 B1 shows a blowout preventer-operator closure system comprising a closure member, a piston rod, an operator housing, a piston, a hose and a closure rod.
- the piston rod is connected at one end to the closure part.
- the operator housing is connected at one end to an attachment and connected at a second end to a head.
- the piston rod extends through the attachment into the operator housing, where it is connected to the piston, which has a body and a flange.
- the tube is helically fastened within a cavity of the piston and can be passed through the closure rod, which is rotatably connected to the head, move axially relative to the piston.
- One end of the lock rod extends through the head and can be operated underwater from outside the operator housing.
- WO 02/36933 A1 presents a blowout preventer with a shut-off device and a connecting channel.
- the shut-off device is displaceable transversely to the connecting channel by means of a drive device.
- the shut-off device includes two individually or synchronously operable electric motors and a self-locking transmission device.
- the self-locking transmission device is drive-connected to the electric motors.
- the object of the invention is to provide a blowout preventer stack that allows improved reliability.
- the invention proposes a blowout preventer stack with at least one blowout preventer unit which has at least one blowout preventer, at least one kinetic energy store, at least one hydraulic pump and at least one hydraulic actuator.
- the hydraulic actuator is arranged outside the kinetic energy store and is connected via a hydraulic line to the hydraulic pump and mechanically to the blowout preventer.
- the kinetic energy store according to the invention is coupled to the hydraulic pump or coupled and the hydraulic pump is driven by means stored in the kinetic energy storage kinetic energy such that the hydraulic pump pumps a hydraulic fluid to the hydraulic actuator, if necessary, and thereby drives the blowout preventer.
- the blowout preventer stack according to the invention can advantageously drive a hydraulic actuator without the need for electrical energy. This is advantageous, in particular, as an emergency safeguard in the event of another fault of control systems, as is the case for the blowout preventer stack if necessary.
- the kinetic energy store if not required, is electrically powered. If such a drive falls away if necessary, the blowout preventer stack according to the invention can particularly advantageously use the stored kinetic energy without supplying further electrical energy in order to operate the hydraulic pump. This contributes to an improvement in the operational safety of the blowout preventer according to the invention.
- the use of the described hydraulics also allows, with little energy to cause a large force through the hydraulic actuator.
- the case of need represents for the blowout preventer stack preferably an unexpected change of a blowout preventer stack structure or a predefined type of malfunction of the blowout preventer stack.
- the hydraulic actuator converts a hydraulic pressure into a mechanical movement.
- the hydraulic actuator is arranged so that the blowout preventer stack fulfills its protective function in case of need, so seals a running through the blowout preventer drill rod of a drill string, deformed or severed.
- the kinetic energy store is usually not permanently coupled to the hydraulic pump, but can be coupled with the hydraulic pump when the need arises, in particular an accident.
- blowout preventer stack according to the invention will be explained in more detail.
- the kinetic energy store can be mechanically coupled or coupled to the hydraulic pump.
- a particularly robust and durable coupling can be ensured, which can typically be maintained easier than, for example, an electrical coupling.
- the kinetic energy storage is coupled via a shaft with the hydraulic pump or can be coupled.
- a shaft is particularly easy to manufacture and maintain.
- a shaft by a direct attachment to the kinetic energy storage such as an attachment along a rotational axis of a flywheel mass storage, largely without coupling losses in Efficiency of the energy storage can be realized.
- the shaft is coupled in a variant of this embodiment, directly or via a transmission, such as a gear train, with the hydraulic pump, so that a corresponding rotation of the shaft drives a pumping mechanism of the hydraulic pump and thereby builds up a pressure for conveying the hydraulic fluid.
- the kinetic energy store is electrically coupled or coupled to the hydraulic pump via an electrical line.
- the kinetic energy store has at least one magnetic material.
- this magnetic material is arranged on the kinetic energy store such that the kinetic energy store generates an induction current in the electrical line. This induction current is used in case of need for driving the hydraulic pump, which drives the blowout preventer.
- the hydraulic actuator is designed to drive, if necessary, a slide of the blowout preventer.
- the slider is preferably movable along a displacement axis.
- the spool typically includes an instrument of the blowout preventer configured to interact with the drill string of the drill string passing through the blowout preventer to prevent uncontrolled discharge of material through the drill string, as needed.
- the hydraulic actuator is mechanically coupled to a shearer of the blowout preventer.
- the hydraulic pump is therefore designed in this embodiment to cut through the blowout preventer extending drill rod of the drill string by means of the shearer.
- a severing of the drill rod is carried out as soon as there is a coupling between the kinetic energy store and the hydraulic pump.
- the hydraulic actuator is a hydraulic cylinder.
- a piston of the hydraulic cylinder which opposes the pressure of the hydraulic fluid is advantageously chosen in this embodiment in such a way that the built-up pressure on the piston is sufficient to displace the piston along a cylinder axis of the hydraulic cylinder.
- This preferably leads to a movement of the piston and an associated instrument, for example a shearer against the drill string.
- the movement of the hydraulic actuator leads to the movement of a Riser, a kill line and / or a choke line of the blowout preventer stack.
- the kinetic energy storage is a flywheel mass memory, which is designed and arranged to rotate at high speed.
- a flywheel accumulator comprises at least one flywheel.
- the flywheel is arranged such that it rotates about an axis of rotation of the flywheel mass memory. It can also be designed as kinetic energy storage several kinetic energy storage.
- the flywheel may be a flywheel, a flywheel, a flywheel or the like and is preferably a flywheel.
- the kinetic energy storage can be designed as a motor-generator combination and absorb energy, convert, store and release again.
- the kinetic energy store can be designed for energy recovery (recuperation).
- the kinetic energy store preferably converts stored kinetic energy into electrical energy and / or electrical energy into kinetic energy.
- the kinetic energy store for example the flywheel storage, contains one or more different magnetic materials.
- a kinetic energy store for example in the form of a flywheel mass memory, has rotational speeds of preferably 10,000-12,000 revolutions per minute and can achieve rotational speeds of up to 100,000 revolutions per minute.
- the kinetic energy stores of the blowout preventer stack are preferably permanently under full speed in order to be permanently available for supplying energy to the blowout preventer equipment or for operating the blowout preventer.
- the number of revolutions can be measured by a control unit which is connected to the kinetic energy store. The amount of the number of revolutions allows the energy supply of the kinetic energy stores, such as flywheel mass storage, to be determined.
- the pivot bearings are preferably magnetic pivot bearings.
- An eddy current brake for braking the kinetic energy storage is conceivable.
- the hydraulic pump and the hydraulic line are arranged outside the kinetic energy store.
- the risk of damage to the hydraulic pump and the hydraulic line can be reduced by the kinetic energy storage.
- such a separation of individual components of the blowout preventer stack simplifies the manufacture of the blowout Preventer stacks, since this allows the individual components to be manufactured separately and arranged within the blowout preventer stack.
- the blowout preventer stack furthermore has a coupling control.
- the coupling control is designed, if necessary, to change from a decoupled state, in which the kinetic energy store is not coupled to the hydraulic pump, into a coupled state, in which the kinetic energy store is coupled to the hydraulic pump. Such a change between decoupled and coupled state is typically triggered by receipt of a demand signal indicating the presence of a need case.
- the coupling control is preferably associated with exactly one kinetic energy store and one correspondingly coupled hydraulic pump. In this case, the coupling and / or decoupling takes place for example via a corresponding transmission, such as a gear or crank gear.
- the demand signal may be an electrical signal that is generated and transmitted due to an emergency power supply of the blowout preventer stack even without external power supply.
- the blowout preventer has a force and / or position sensor, which is designed to measure force and / or position data and to provide it as a data signal.
- the force and / or position sensor can be designed to monitor a state of the blowout preventer, in particular with regard to the presence of the requirement. In this case, changes in a structure of the blowout preventer, for example unexpected position data of a component of the blowout preventer equipped with the force and / or position indicator, can lead to the detection of the requirement.
- the force and / or position sensor is further configured to send the demand signal to the coupling controller as a data signal. In this way, a coupling between the kinetic energy store and the hydraulic pump can be provided automatically by measuring force and / or position data.
- the force and / or position sensors may alternatively or additionally be designed, a force acting on the jaws of a ram blowout preventer (Ram Blowout Preventer) or on annular rubber elements of an Annular Blowout Preventers force and / or a position of the jaws or annular rubber elements to measure and to provide a data signal containing the measurement data (force and / or position data), which via a sensor line to a power supply system and / or to a control system connected to the coupling control of the blowout preventer stack can be transmitted.
- the control system can control the blowout preventer in a targeted manner and adjust it in such a way that low material wear can be achieved with good sealing effect.
- the kinetic energy store is designed to transmit kinetic energy to other kinetic energy stores or to receive them from them.
- Such transfer of kinetic energy can be realized in kinetic or electrical form.
- a kinetic energy store can generate inductive current by means of a rotation of a magnet and drive through it a further kinetic energy store.
- the use of a plurality of kinetic energy stores according to this embodiment makes it possible to use all interconnected kinetic energy stores as an energy reservoir for the operation of the blowout preventer and thus of the blowout preventer stack.
- the blowout preventer stack further comprises a control unit which is designed to detect the presence of the need and to initiate a driving of the hydraulic pump by means of the stored kinetic energy, if necessary.
- the control unit preferably forms part of the power supply and control systems of the blowout preventer stack.
- the control unit is part of the coupling control.
- the driving of the hydraulic pump is triggered by coupling the kinetic energy store with the hydraulic pump.
- the blowout preventer stack according to the invention has at least one additional kinetic energy store, with the additional kinetic energy store being able to be coupled or coupled to the at least one hydraulic pump.
- the hydraulic pump can advantageously be driven by at least two kinetic energy stores, which is particularly advantageous if a kinetic energy storage fails if necessary.
- both kinetic energy storage can simultaneously drive the hydraulic pump, whereby a particularly high pressure can be transmitted to the hydraulic fluid.
- the at least one blowout preventer is an annular blowout preventer, a pipe-ram blowout preventer or a shear-rack blowout preventer.
- the blowout preventer stack can also contain several of the named blowout preventer stack components.
- the blowout preventer stack includes an upper annular blowout preventer, a riser connection device, a lower annular blowout preventer, a shear blowout preventer, a pipe ram blowout preventer, and a downhole header device on.
- This embodiment is particularly preferred for wells on the seabed where the blowout preventer stack is located above the wellbore on the seabed and connected by a riser to a wellhead or drilling platform located at the ocean surface or water surface.
- the blowout preventer stack can have only one Annular Blowout Preventer and be designed without a riser connection device (riser connector).
- all blowout preventer stack components are mechanically and / or electrically operable.
- the blowout preventer stack components may also be operated at least partially kinetically, i. with kinetic energy from the kinetic energy stores.
- the hydraulic pump is a piston pump.
- the piston pump preferably has an adjustable piston stroke and thus an adjustable delivery line.
- a crankshaft of the piston pump is preferably mechanically connected directly to an output shaft of a kinetic energy store.
- the hydraulic pump preferably has a connecting rod attached to an eccentric of a crankshaft for driving a piston of the piston pump, wherein an eccentricity of the eccentric relative to a rotational axis of the crankshaft is adjustable.
- the hydraulic pump according to this embodiment makes it possible in an advantageous manner to couple the kinetic energy store with the hydraulic pump, without already is driven by the coupling of the blowout preventer.
- the piston pump is designed such that an amount of hydraulic fluid pumped by the hydraulic pump is adjustable via an adjustable eccentricity of the eccentric with respect to the axis of rotation of the crankshaft.
- the eccentric position of the eccentric can also be adjusted so that no or almost no hydraulic fluid can be pumped via the hydraulic pump to the hydraulic actuator.
- the blowout preventer stack in this embodiment has no coupling control, so that a permanent coupling between the kinetic energy store and the hydraulic pump is present.
- the eccentric position of the eccentric is preferably controlled via an eccentric control within the hydraulic pump, which is connected to a control system of the blowout preventer stack or to the control unit, so that a reaction of the necessity causes a change in the eccentric position such that more hydraulic fluid is supplied via the hydraulic pump is pumped to the hydraulic actuator.
- the abovementioned object is achieved by a self-sufficient energy storage and drive unit, in particular for a blowout preventer, with at least one kinetic energy store, at least one hydraulic pump and at least one hydraulic actuator.
- the hydraulic actuator is arranged outside the kinetic energy store and connected to the hydraulic pump via a hydraulic line.
- the kinetic energy store can be coupled or coupled to the hydraulic pump and the hydraulic pump can be driven by means of kinetic energy stored in the kinetic energy store so that the hydraulic pump can be used as required a hydraulic fluid is pumped to the hydraulic actuator.
- the energy storage and drive unit according to the invention can advantageously increase the operational safety of a blowout preventer stack equipped with the energy storage and drive unit.
- the kinetic energy store is in this case mechanically coupled to the hydraulic pump or coupled.
- the kinetic energy store can be coupled or coupled to the hydraulic pump via a shaft.
- FIG. 2 shows a second embodiment of the blowout preventer stack according to the invention with a self-sufficient energy storage and drive unit.
- FIG. 3 shows a signal structure for driving the blowout preventer stack according to the invention
- Fig. 4 A variant of a blowout preventer unit with a
- Hydraulic pump in the form of a piston pump with adjustable piston stroke.
- Fig. 5a to 5c a possible realization of an adjustable piston stroke.
- FIG. 1 shows a first exemplary embodiment of a blowout preventer stack 100 according to the invention with a self-sufficient energy storage and drive unit 105.
- the blowout preventer stack 100 has at least one blowout preventer 110, a kinetic energy store 120, a hydraulic pump 130 and a hydraulic actuator 140.
- the self-sufficient energy storage and drive unit 105 is characterized by the kinetic energy store 120, the hydraulic pump 130 and the hydraulic Actuator 140 is formed, which is arranged outside the kinetic energy store 120 and connected via a hydraulic line 138 a, 138 b to the hydraulic pump 130.
- the kinetic energy store 120 is a flywheel memory, which is designed to rotate a flywheel mass 122 of the flywheel mass memory at high speed.
- the flywheel energy storage is typically powered by a power supply to the blowout preventer stack 100, which is not shown for clarity.
- the kinetic energy of the flywheel 122 can be used by the moving flywheel 122 even without a connection to the power supply. This is preferably done via a shaft 128 arranged along an axis of rotation of the kinetic energy store.
- the shaft 128 connects the kinetic energy store 120 indirectly with the hydraulic pump 130.
- a coupling control 150 is connected to the shaft 128 and designed, if necessary, from a decoupled state in which the kinetic energy store 120 is not coupled to the hydraulic pump 130.
- the shaft 128 is connected to a second shaft 132 of the hydraulic pump 130 via the coupling control 150, for example via a wheel or belt transmission of the coupling control 150.
- the second shaft 132 is disposed directly on the hydraulic pump 130. Therefore, the kinetic energy storage 120 is coupled to the hydraulic pump 130 or coupled.
- the second shaft 132 by rotating along its longitudinal axis, can drive the hydraulic pump 130 and thereby pump a hydraulic fluid 136 through the hydraulic line 138a, 138b to the hydraulic actuator 140.
- the hydraulic line 138 a, 138 b consists of a pumping line 138 a into which the hydraulic fluid 136 is pumped by the hydraulic pump 130, and a suction line 138 b, through which the pumped hydraulic fluid 136 is fed back to the hydraulic pump 130.
- the hydraulic pump 130 consequently has a closed circuit of the hydraulic fluid 136.
- the hydraulic pump is operated via an open circuit of the hydraulic fluid, for example, using a hydraulic fluid reservoirs.
- the hydraulic pump 136 is formed according to a known hydraulic pump type.
- the hydraulic pump 136 is a piston pump.
- the hydraulic pump is a vane pump, a gear pump or a screw pump.
- the hydraulic pump 136, the hydraulic lines 138 a, 138 b, and the hydraulic actuator 140 are arranged outside the kinetic energy store 120 in the exemplary embodiment.
- the hydraulic actuator 140 is a hydraulic cylinder in the embodiment.
- Other known hydraulic actuators can also be used for the blowout preventer stack according to the invention, as long as they provide a hydraulic pressure in a movement of a component, preferably in an axial movement of a component of the hydraulic convert actuator.
- the hydraulic cylinder shown consists of a piston surrounded by a cylinder, which is pressed by a pumping force caused by the hydraulic fluid 136 in an axial direction with respect to the hydraulic cylinder. By pressing the piston, a slider 144 of the blowout preventer 1 10 is moved, to which a shearer 148 of the blowout preventer 1 10 is mechanically fastened.
- a seal or a clamping jaw or another known component for sealing, deforming or cutting the boring bar is attached to the slide or directly to the hydraulic actuator.
- the blowout preventer 110 shown in FIG. 1 is a shear-rack blowout preventer.
- the blowout preventer according to the invention is an Annular Blowout Preventer or a pipe ram blowout preventer.
- the hydraulic pump is disposed within the kinetic energy store, in particular within the flywheel energy storage.
- the demand signal is provided by a control unit (not shown) which detects the presence of a need and then automatically triggers the hydraulic pump 130 via the kinetic energy store 120 via the demand signal.
- the need case is detected in the first embodiment by means of a force and / or position sensor, which is designed to measure force and / or position data at a location of the blowout preventer stack and to provide it as a data signal. If measured values contained in the force and / or position data deviate from a predetermined value for this data beyond a predetermined extent, the presence of the requirement is assumed.
- the blowout preventer stack 100 typically has further parts, so that in the present exemplary embodiment it has an upper annular blowout preventer, an ascending blower connection preventer, in addition to the shear ram blowout preventer, which is partially shown in FIG. Direction, a lower Annular blowout preventer, a pipe ram blowout preventer and a wellhead connection device has.
- the present in the first embodiment typical expression of these parts of the blowout preventer stack is known.
- FIG. 2 shows a second exemplary embodiment of the blowout preventer stack 200 according to the invention with a self-sufficient energy storage and drive unit 205.
- the blowout preventer 210 encompassed by the blowout preventer stack 200 is identical to the blowout preventer 110 shown in FIG. 1 except for the presence of a second kinetic energy store 220 and a corresponding second connection 231 of the hydraulic pump 230.
- the kinetic energy store 110 is coupled or coupleable to the hydraulic pump 230 via a first coupling controller 214, while the second kinetic energy store 210 can be coupled or coupled to the hydraulic pump 230 via a second coupling controller 218.
- the first coupling controller 214 is configured to send an electrical signal 240 to the second coupling controller 218 at predetermined time intervals
- the second coupling controller 218 is configured to receive the electrical signal 240.
- the second coupling controller is configured not to couple a fourth shaft 236 connected to the hydraulic pump 230 to the third shaft 232 connected to the second kinetic energy storage 210 as long as the electrical signal 240 is received. If no more electrical signal 240 is received, the second coupling controller 218 is configured to change to the coupled state in which the second kinetic energy storage 210 is coupled to the hydraulic pump 230. This makes it possible to drive the hydraulic pump 230 even when the kinetic energy 10 is defective, which is characterized by the absence of the electrical signal 240.
- the blowout preventer is designed such that a plurality of kinetic energy stores can simultaneously drive the hydraulic pump.
- a kinetic energy storage of a blowout preventer formed to transmit kinetic energy to other kinetic energy storage or receive from them. This can be realized via a mechanical or electrical connection between two kinetic energy stores.
- FIG. 3 shows a signal structure 300 for driving the blowout preventer stack according to the invention.
- the signal structure 300 shows the interaction of the force and / or position sensor 310, control unit 320 and the coupling control 150 from FIG. 1.
- the force and / or position sensor 310 is configured to measure current data relating to a force and / or position present at the force and / or position sensor 310 and output it to the control unit 320 as force and / or position data 315 ,
- the control unit 320 is configured to receive the force and / or position data 315 and to determine whether the measured values for the applied force and / or the position present in the force and / or position data 315 exceed a predetermined extent deviate from predetermined values for this data. If such a large deviation is detected by the control unit 320, the control unit 320 is further configured to output the required signal 325 to the coupling controller 150 and thereby indicate the presence of the need.
- the force and / or position sensor is designed to carry out the comparison with predetermined values for the force and / or position data and accordingly to detect the presence of the requirement.
- the pre-clearing of the case of need is detected via a corresponding user input, by means of which the coupling controller changes into the coupled state.
- the coupling control can also be realized within the hydraulic pump or within the kinetic energy store, so that in some embodiments according to the invention no second wave exists to couple the kinetic energy store with the hydraulic pump.
- FIG. 4 shows a blowout preventer 400 with a kinetic energy store 410.
- the kinetic energy store is a flywheel mass storage in which a flywheel 412 rotates at high speed.
- a drive 420 is provided, for example, an electric motor, which is supplied via a supply line 422 with energy, for example, into electrical energy and which is connected via a shaft 424 with the flywheel energy storage 410.
- the flywheel mass storage 410 can deliver its stored kinetic energy even if the drive 420 is no longer supplied via the supply line 422.
- the flywheel mass storage 410 is mechanically connected to a hydraulic pump 440.
- an output shaft 430 of the kinetic energy store 410 is connected via a combustible mechanical clutch 432 to a crankshaft 442 of the hydraulic pump 440.
- the mechanical coupling 432 is not essential.
- the hydraulic pump 440 is a piston pump with two cylinders 444 in which pistons 446 move up and down to pump hydraulic oil in a hydraulic line 460 in this manner.
- the pistons 446 are connected in a known manner via a respective connecting rod 448 with the eccentrics 450 of the crankshaft 442.
- the hydraulic pump 440 is connected via the hydraulic line 460 to a hydraulic actuator 470 that can drive a scraper 480 or other ram of a blowout preventer.
- Figures 5a to 5c show that the stroke or the eccentricity of the eccentric 450 is adjustable, so that the stroke of the piston 446 is continuously adjustable between a minimum of 0 and a maximum stroke.
- the eccentric position - and thus the stroke of the hydraulic pump - can be adjusted by turning an eccentric cylinder 452.
- the eccentric position can be adjusted by turning an eccentric cylinder 452.
- the eccentric cylinder 452 is in such a way in a crankshaft cylinder 456 the crank shaft 442 used that an eccentric 450 protruding from the eccentric cylinder 452, to which the connecting rod 448 is attached, changes its position relative to a rotation axis 454 of the crankshaft 442 when the eccentric cylinder 452 is rotated about its eccentric axis.
- Figures 5a to 5c illustrate how an adjustable piston stroke can be achieved with a hydraulic pump 440.
- a crankshaft cylinder 456 is arranged eccentrically to the rotation axis 454 of the crankshaft 442, to which the eccentric 450 is fastened via an eccentric cylinder 452 with an adjustable rotation angle.
- the eccentric 450 has an outer surface on which the connecting rod 448 engages. This outer surface is a cylindrical lateral surface. Eccentrically to this cylindrical surface of the eccentric cylinder 452 is arranged, which forms a cylindrical inner surface. This cylindrical inner surface encloses a cylindrical outer surface of the crankshaft cylinder 456 and is applied to this.
- FIG. 5a shows the first eccentric position, in which the eccentric 450 runs coaxially with the axis of rotation 454, so that the connecting rod 448 does not cause any lifting movement when the crankshaft 442 rotates about the rotational axis 454.
- the piston 446 connected to the connecting rod 448 is therefore not driven and does not pump hydraulic fluid to the hydraulic actuator.
- FIG. 5b shows the second eccentric position, in which the eccentric 450 is at a distance from the rotation axis 454, so that the connecting rod 448 moves when the crankshaft 442 rotates and a piston of the hydraulic pump connected correspondingly to the connecting rod 448 pumps hydraulic fluid.
- FIG. 5a shows the center of the eccentric 450 in alignment with the axis of rotation 454 of the crankshaft 442, so that the connecting rod 448 and piston 446 do not experience a stroke even when the crankshaft 442 rotates.
- Figures 5b and 5c show as vice versa corresponding rotational position of the eccentric 450 with respect to the crankshaft cylinder 456 a maximum stroke is adjustable.
- FIG. 5b shows the top dead center of the piston 446
- FIG. 5c shows the bottom dead center of the piston 446.
- Hydraulic pump 440 can be adjusted continuously. This also makes it possible to dispense with the mechanical coupling 432 and instead to control the delivery of hydraulic oil through the hydraulic pump 440 via the eccentricity of the outer surface of the eccentric 450.
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- Geochemistry & Mineralogy (AREA)
- Fluid Mechanics (AREA)
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- General Life Sciences & Earth Sciences (AREA)
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Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102016216469.4A DE102016216469A1 (de) | 2016-08-31 | 2016-08-31 | Blowout-Preventer Stack |
PCT/EP2017/071932 WO2018041983A1 (de) | 2016-08-31 | 2017-08-31 | Blowout-preventer stack |
Publications (1)
Publication Number | Publication Date |
---|---|
EP3507449A1 true EP3507449A1 (de) | 2019-07-10 |
Family
ID=59887217
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP17768036.0A Withdrawn EP3507449A1 (de) | 2016-08-31 | 2017-08-31 | Blowout-preventer stack |
Country Status (5)
Country | Link |
---|---|
US (1) | US10801292B2 (de) |
EP (1) | EP3507449A1 (de) |
DE (1) | DE102016216469A1 (de) |
RU (1) | RU2019109024A (de) |
WO (1) | WO2018041983A1 (de) |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8579033B1 (en) * | 2006-05-08 | 2013-11-12 | Mako Rentals, Inc. | Rotating and reciprocating swivel apparatus and method with threaded end caps |
US11441579B2 (en) | 2018-08-17 | 2022-09-13 | Schlumberger Technology Corporation | Accumulator system |
GB2577393B (en) | 2018-08-17 | 2021-03-17 | Cameron Tech Ltd | Accumulator |
US11708738B2 (en) | 2020-08-18 | 2023-07-25 | Schlumberger Technology Corporation | Closing unit system for a blowout preventer |
CN112593898B (zh) * | 2020-11-30 | 2022-09-23 | 内蒙古民族大学 | 一种风电混合动力驱动抽油机系统及其工作方法 |
CN114624126B (zh) * | 2022-05-11 | 2022-07-29 | 四川中铁二院环保科技有限公司 | 一种岩土原位剪切测试设备及方法 |
US20240110456A1 (en) * | 2022-09-30 | 2024-04-04 | Worldwide Oilfield Machine, Inc. | Non-sealing casing shear rams |
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WO2011151160A1 (de) * | 2010-06-02 | 2011-12-08 | Schaeffler Technologies Gmbh & Co. Kg | Luftfahrzeug und stromversorgungseinheit hierfür |
US20140131049A1 (en) * | 2012-11-07 | 2014-05-15 | Transocean Sedco Forex Ventures Limited | Subsea energy storage for blow out preventers (bop) |
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US5101907A (en) * | 1991-02-20 | 1992-04-07 | Halliburton Company | Differential actuating system for downhole tools |
US5318130A (en) * | 1992-08-11 | 1994-06-07 | Halliburton Company | Selective downhole operating system and method |
WO1996021795A1 (en) | 1995-01-13 | 1996-07-18 | Hydril Company | Low profile and lightweight high pressure blowout preventer |
US5575452A (en) * | 1995-09-01 | 1996-11-19 | Varco Shaffer, Inc. | Blowout preventer with ram wedge locks |
DE20018561U1 (de) | 2000-10-30 | 2002-03-21 | CAMERON GmbH, 29227 Celle | Ausbruchsventilanordnung |
US6719042B2 (en) | 2002-07-08 | 2004-04-13 | Varco Shaffer, Inc. | Shear ram assembly |
US20080023917A1 (en) | 2006-07-28 | 2008-01-31 | Hydril Company Lp | Seal for blowout preventer with selective debonding |
US7300033B1 (en) | 2006-08-22 | 2007-11-27 | Cameron International Corporation | Blowout preventer operator locking system |
US8779614B2 (en) * | 2011-11-04 | 2014-07-15 | Schlumberger Technology Corporation | Power generation at a subsea location |
GB2520895B (en) * | 2012-09-10 | 2017-09-20 | Cameron Int Corp | Electric actuator with a force / pressure measurement sensor |
DE102013217383A1 (de) * | 2013-08-30 | 2015-03-19 | Klaus Biester | Blowout-Preventer Stack und Versorgungssystem |
US20170218717A1 (en) | 2014-08-07 | 2017-08-03 | Shell Oil Company | Kinetic shear ram |
US20160100703A1 (en) * | 2014-10-13 | 2016-04-14 | Todd A. Fenner | Universal threaded bottle cap and straw |
US10323484B2 (en) * | 2015-09-04 | 2019-06-18 | Weatherford Technology Holdings, Llc | Combined multi-coupler for a top drive and a method for using the same for constructing a wellbore |
US10590744B2 (en) * | 2015-09-10 | 2020-03-17 | Weatherford Technology Holdings, Llc | Modular connection system for top drive |
-
2016
- 2016-08-31 DE DE102016216469.4A patent/DE102016216469A1/de not_active Withdrawn
-
2017
- 2017-08-31 US US16/329,049 patent/US10801292B2/en active Active
- 2017-08-31 RU RU2019109024A patent/RU2019109024A/ru not_active Application Discontinuation
- 2017-08-31 WO PCT/EP2017/071932 patent/WO2018041983A1/de unknown
- 2017-08-31 EP EP17768036.0A patent/EP3507449A1/de not_active Withdrawn
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WO2011151160A1 (de) * | 2010-06-02 | 2011-12-08 | Schaeffler Technologies Gmbh & Co. Kg | Luftfahrzeug und stromversorgungseinheit hierfür |
US20140131049A1 (en) * | 2012-11-07 | 2014-05-15 | Transocean Sedco Forex Ventures Limited | Subsea energy storage for blow out preventers (bop) |
Non-Patent Citations (1)
Title |
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Also Published As
Publication number | Publication date |
---|---|
RU2019109024A3 (de) | 2020-10-08 |
US10801292B2 (en) | 2020-10-13 |
WO2018041983A1 (de) | 2018-03-08 |
DE102016216469A1 (de) | 2018-03-01 |
RU2019109024A (ru) | 2020-10-01 |
US20190218879A1 (en) | 2019-07-18 |
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