EP3363987A1 - Drilling device and method for producing a borehole - Google Patents

Abstract

The invention relates to a drilling apparatus and a drilling method in which by means of a drilling device, the bore is introduced, the drilling device is clamped by means of a clamping device (22, 26) on a support tube or in the bore, is removed by rotating driving a drilling tool of the drilling soil material and an energy required for drilling via a connection device (48) via an external power supply (46) is supplied. According to the invention, the tensioning device is connected to a note energy unit (50) on a support frame of the drilling device, wherein the note energy unit is activated by a release unit for releasing the tensioning device.

Description

The invention relates to a drilling device for creating a bore with a drill drive, a drilling tool which is driven in rotation by the drill drive, a support frame, on or in which the drill drive and the drilling tool are mounted, wherein the support frame is formed on or in a support tube or to be arranged in the bore, at least one clamping device, which is designed for releasably clamping the support frame on the support tube or in the bore, a suspension device on the upper side of the support frame for suspending the drilling device and at least one connection device for connecting an external power supply, according to the preamble of claim 1.

The invention further relates to a drilling method for creating a bore in which by means of a drilling device in a reason, in particular a body of water, the bore is introduced, the drilling device is clamped by means of at least one clamping device on a support tube or in the bore, by rotationally driving a drilling tool The drilling apparatus is removed from the soil material and an energy required for drilling is supplied via a connection device via an external power supply, according to the preamble of claim 11.

Such drilling devices include so-called inner hole drilling devices. These have a support frame on which the drill drive is arranged. The support frame is releasably tightened to support the torque on the wall of the bore or a previously introduced into the ground support tube.

The power supply for the drilling drive is usually done by means of hydraulic lines, which supply hydraulic energy from a remote base unit. A generic prior art, for example, from the EP 0 349 610 B1 out.

Such drilling devices are frequently also used for underwater drilling, in which the basic unit is arranged on a watercraft, in particular a ship. First, a support or foundation pipe is introduced into the riverbed. Within the previously introduced support tube, the desired bore can be created with the drilling device. By stepwise tightening, drilling, loosening and re-tightening relatively large depths can be achieved with such drilling devices.

Furthermore, from the EP 1 154 078 B1 a so-called flydrill drilling device is known, in which a support frame is clamped to the drill drive at the top of a previously introduced support tube. Also in these known drilling devices, the energy supply takes place externally by means of power lines, in particular via hydraulic hoses.

With these drilling devices with an external energy supply via hydraulic hoses there is the danger that under certain operating conditions, such as when working in rough seas, the power supply lines must be cut short term. Also, there is a general risk of hydraulic hose breakage in drilling devices, wherein the drilling device is separated from an external power supply unexpectedly. In such cases, it is often costly to retrieve a boring device clamped on or in the borehole.

The invention has for its object to provide a drilling device and a drilling method in which a reliable retrieval of the drilling device is made possible even with an unexpected failure of the power supply.

The object is achieved according to the invention by a drilling apparatus having the features of claim 1 and by a drilling method having the features of claim 11. Preferred embodiments are given in the respective dependent claims.

The drilling device according to the invention is characterized in that a note energy unit is provided on the support frame, that the note energy unit is connected to the clamping device for releasing the clamping and that a triggering unit is provided, through which the note energy unit for releasing the clamping device can be activated.

A basic idea of the invention can be seen to provide the drilling device with a self-sufficient energy unit, through which sufficient energy is provided to provide sufficient energy in a sudden or unexpected disconnection of the drilling device from the external power supply to a clamping of the drilling device on Reliably solve support tube or downhole. In this case, a trip unit is provided for releasing the targeted solves the tensioning device. The trip unit can basically be designed so that it triggers automatically under certain conditions. Preferably, however, the trip unit is designed so that it is activated by a machine operator targeted.

With the boring device according to the invention a safe and easy release of a clamped drilling device is possible at any time, even if it is located in a relatively large drilling depth and is separated unexpectedly from the external power supply.

In principle, the clamping device can be designed in any desired manner. According to one embodiment of the invention, it is particularly preferred for the at least one tensioning device to have at least one tensioning cylinder. Preferably, the clamping cylinder is hydraulically operated. The clamping cylinder has a fail-safe mode, in which the clamping cylinder remains in the clamping position when the external hydraulic supply is disconnected.

A further advantageous embodiment of the invention is that the clamping device is electrically actuated and that the note power unit comprises an electric battery. In this case, the clamping device can have an electric drive for clamping as a whole. However, the clamping device may also have a hydraulic cylinder which is actuated by an electrical actuation of vent valves to release a clamping force.

According to a development of the invention, it is advantageous that the note energy unit comprises a hydraulic fluid reservoir, which is connected via a hydraulic line with the clamping cylinder of the clamping device. In particular, the clamping cylinder may be formed as a double-acting clamping cylinder. By the note power unit provided on the support frame self-sufficient hydraulic fluid reservoir is actuated by which the clamping cylinder can be reset from a clamping position to a release position.

According to a development of the invention, an advantageous variant is that the emergency energy unit can be activated by the trip unit, when the drilling device is retracted with interrupted external power supply via the suspension of the support tube or the borehole. As a result, damage to the drilling device can be avoided particularly reliably. If a return force is applied to the drilling device via the suspension device, in particular a hoisting cable, this can lead to damage to the drilling device if the drilling device is still tightened. According to the invention, the triggering unit is automatically actuated and a clamping released when applying a certain tensile force in a tightly tensioned drilling device, so that the drilling device is released.

According to a development of the invention, this can be achieved in particular by arranging the triggering unit in the region of the suspension device. The trip unit may be formed electrically, electronically or preferably mechanically or by a corresponding hydraulic circuit. Preferably, the hydraulic fluid reservoir is formed in the region of the suspension device. A suspension element on the drilling device can be displaceably mounted, wherein the trip unit is actuated by an applied tensile force and thereby caused displacement.

Alternatively or additionally, it may be provided according to a development of the invention that the trip unit has a receiver for receiving a trigger signal, which is emitted by a transmitter. The transmitter is designed in particular as a wireless radio transmitter, which can be operated by a machine operator. So can be effected by the machine operator targeted a release of the clamped drilling device.

According to another embodiment of the invention, it is advantageous that the note energy unit comprises a hydraulic cylinder in which a displacer is slidably mounted, and in that the displaceable displacer is in communication with the suspension means, wherein upon application of a tensile force to the suspension means by the displacer hydraulic fluid in the hydraulic cylinder is pressurized. In this embodiment, the hydraulic cylinder with the hydraulic fluid is the hydraulic reservoir for actuating the tensioning device. In particular, it is advantageous in this embodiment that the hydraulic fluid in the hydraulic cylinder is only pressurized by displacement of the displacer piston due to the tensile force acting on the suspension device. This ensures particularly well that always enough energy is available. The pressure energy is built up only at the time when it is needed. This avoids a continuous load and reduces a sealing effort.

A further advantageous embodiment of the invention is that the suspension device is arranged directly on the displacement piston. In particular, the suspension point of the drilling device is located on an extension of a piston rod of the displacer piston. Thus, the triggering device is placed under pressure and thus in an operational state with each lifting of the drilling device. Preferably, the triggering device can also be actuated directly, so that a release of the clamping device is reliably ensured with each lifting of the drilling device.

According to a development of the invention, it is advantageous that at the top of the support frame, a toggle lever is pivotally connected, that the suspension device is connected to a first lever arm of the toggle lever and that a second lever arm of the toggle lever is in operative connection with an actuating plunger for moving the displacer. In this arrangement, there is an increased arrangement margin for the hydraulic cylinder. In addition, an increase in force of the suspension force can be effected by the toggle lever arrangement, so that a total of an increased pressure is built up in the hydraulic cylinder.

With regard to the drilling method, the invention is characterized in that a drilling device is used, as described above, and that the Clamping device is connected to a note power unit on a support frame of the drilling device, wherein the note power unit is activated by a trip unit for releasing the clamping device.

With the drilling method, a reliable recovery of a clamped drilling device can be achieved, even if an external power supply is interrupted. Incidentally, with the drilling method, the advantages described above can be achieved, as described in connection with the drilling device according to the invention.

A preferred variant of the method according to the invention is that activating the note energy unit takes place when the external power supply is interrupted and / or the drilling device is pulled out of the support tube. As a result, a reliable release of a tightened drilling device is always ensured by a support tube, so that damage to the drilling device, the support tube or the pulling device can be avoided.

Fig. 1

eine perspektivische Darstellung einer erfindungsgemäßen Bohrvorrichtung;

Fig. 2

eine Seitenansicht der erfindungsgemäßen Bohrvorrichtung mit einer zugehörigen Bohranlage;

Fig. 3

eine Seitenansicht einer Aufhängeeinrichtung einer erfindungsgemäßen Bohrvorrichtung;

Fig. 4

eine perspektivische Ansicht der Aufhängeeinrichtung von Fig. 3 bei entlasteter Aufhängung;

Fig. 5

eine Seitenansicht der Aufhängeinrichtung der Figuren 3 und 4 bei belasteter Aufhängung;

Fig. 6

eine perspektivische Ansicht der Aufhängeinrichtung im belasteten Zustand gemäß Fig. 5;

Fig. 7

eine Seitenansicht einer weiteren Aufhängeeinrichtung einer erfindungsgemäßen Bohrvorrichtung;

Fig. 8

eine weitere Seitenansicht der Aufhängeeinrichtung von Fig. 7 bei entlasteter Aufhängung;

Fig. 9

eine perspektivische Ansicht der Aufhängeeinrichtung der Figuren 7 und 8 in einem entlasteten Zustand;

Fig. 10

eine Seitenansicht der Aufhängeeinrichtung der Figuren 7 bis 9 mit belasteter Aufhängung;

Fig. 11

eine weitere Seitenansicht der Aufhängeeinrichtung von Fig. 10;

Fig. 12

eine perspektivische Ansicht der Aufhängeeinrichtung im belasteten Zustand gemäß den Figuren 10 und 11; und

Fig. 13

eine teilweise und schematische Ansicht einer erfindungsgemäßen Bohrvorrichtung mit einer funkgesteuerten Auslöseeinheit.

The invention will be further described by means of preferred embodiments, which are illustrated in the drawings. In the drawings show:

Fig. 1

a perspective view of a drilling device according to the invention;

Fig. 2

a side view of the drilling device according to the invention with an associated drilling rig;

Fig. 3

a side view of a suspension device of a drilling device according to the invention;

Fig. 4

a perspective view of the suspension of Fig. 3 with unloaded suspension;

Fig. 5

a side view of the suspension of the FIGS. 3 and 4 with loaded suspension;

Fig. 6

a perspective view of the suspension in the loaded state according to Fig. 5 ;

Fig. 7

a side view of another suspension device of a drilling device according to the invention;

Fig. 8

another side view of the suspension of Fig. 7 with unloaded suspension;

Fig. 9

a perspective view of the suspension of the FIGS. 7 and 8 in a relaxed condition;

Fig. 10

a side view of the suspension of the FIGS. 7 to 9 with loaded suspension;

Fig. 11

another side view of the suspension of Fig. 10 ;

Fig. 12

a perspective view of the suspension device in the loaded state according to the FIGS. 10 and 11 ; and

Fig. 13

a partial and schematic view of a drilling device according to the invention with a radio-controlled trip unit.

According to Fig. 1 For example, a boring device 10 according to the invention has a support frame 12 made up of plates and vertical struts, on which a drill drive 14, which is only shown concealed, is arranged. The drill drive 14 is used for rotationally driving a drill string 15, at the lower end of a drilling tool 20 is arranged with Abtragszähnen for removing soil material.

The illustrated drilling apparatus 10 is designed as an in-hole drilling unit, which is supported by means of a radially acting first clamping device 22 and a further radially acting second clamping device 26 on an inner wall of a previously introduced into the ground support tube or directly on a borehole wall. The first clamping device 22 has uniformly around the circumference distributed first clamping jaws 24, which are radially extendable and retractable by means of clamping cylinders, not shown. In a similar manner, second clamping jaws 28 can be moved in and out of the second clamping device 26 via not shown radially acting clamping cylinders. In the radially extended position of the clamping jaws 24, 28, the respective clamping device 22, 26 clamped relative to the support tube or the bore wall.

The first clamping device 22 is fixedly arranged on the support frame 12. The annular second clamping device 26 is axially displaceable by means of axially acting actuating cylinder 30 relative to the support frame 12 and the first clamping device 22. An energy supply of the auger drive 14 and the clamping devices 22, 26 and the axial actuating cylinder 30 takes place externally via power supply lines 46, which are detachably connected to a connection device 48 on an upper side of the support frame 12. The power supply lines 46 are designed in particular as hydraulic lines and / or electric lines.

In order to create a borehole, the boring device 10 is moved by means of a drilling rig 100, which is in Fig. 2 is shown schematically and in principle may be part of the drilling apparatus 10 according to the invention, sunk into a soil. In the ground previously unillustrated support tube may be introduced by drilling, ramming or vibration drilling.

The drilling device 10 is first clamped within the support tube with the first clamping device 22 by radially extending the first clamping jaws 24. By rotationally driving the drilling tool 20, soil material is removed, which is pumped off via a suspension line not shown in detail as crushed soil material together with a drilling fluid from the created wellbore. In this case, the drilling tool 20 gradually descends with the drill string 15 downwards. This axial movement is followed by the second clamping device 26, which is mounted axially adjustable relative to the clamped support frame 12. Downward driving can be additionally supported by extending the axial actuating cylinder 30. After performing this first drilling step, the second clamping jaws 28 of the second clamping device 26 are radially extended and this clamped relative to the support tube. Then, the first clamping jaws 24 of the first clamping device 22 can be solved and the support frame 12 can be tracked by retracting the axial actuating cylinder 30 down. Subsequently, the first clamping jaws 24 can be moved radially outward again by the clamping cylinders, not shown, and thus the carrier frame 12 can be clamped again by means of the first clamping device 22 and fixed in its position.

The second clamping jaws 28 of the second clamping device 26 can be released again, so that a further drilling step can be carried out according to a stroke length.

In the Fig. 2 Drilling rig 100 shown has a drilling platform 102, on which a drilling mast 104 and energy supply units 106 are arranged. The power supply units 106 may in particular comprise a diesel engine which drives a hydraulic pump for supplying the drilling apparatus 10 with hydraulic energy. The hydraulic energy is supplied via the power supply lines 46 of the drilling apparatus 10, which, however, in Fig. 2 are not shown in detail.

The drilling apparatus 10 is suspended vertically adjustable on the drilling mast 104 via a suspension cable 108. The suspension cable 108 and the power supply lines 46 are on winds and resettable.

With the drilling device 10 according to the invention, drilling depths of up to 100 m and beyond can be achieved. In principle, there is a risk, for example in the case of operation on the high seas or in the event of an unexpected hose break, that the drilling apparatus 10 in the borehole is cut off from the external energy supply. This can also occur if, under certain conditions, a disconnection of the power supply lines 46 from the connection device 48 is required.

In order to allow in such a case a safe retrieval of the drilling device 10 clamped in the bore by the suspension rope 108, the drilling device 10 according to the invention is provided with a special note energy unit 50, which in Fig. 1 indicated and described in more detail below.

In a first embodiment according to the FIGS. 3 to 6 a suspension device 40 is provided for the suspension cable 108, which is connected to the only partially shown support frame 12 of the drilling device 10 via a toggle lever 41. The toggle lever 41 has a first lever arm 42 and a second lever arm 43 arranged at right angles thereto. In the corner region of the toggle lever 41, this is articulated via a pivot joint 44 on an upper plate of the support frame 12 about a horizontal axis pivotally. The first lever arm 42 is hinged attached to a lower end of the hanger 40. The second lever arm 43 is connected to an actuating punch 55 of an emergency power unit 50 in connection. In this case, the actuating piston 55 is an axial extension of a displacer 54, which is mounted displaceably in a hydraulic cylinder 53. The hydraulic cylinder 53 forms a hydraulic fluid reservoir 52 of the note energy unit 50. The hydraulic fluid reservoir 52 is connected via lines, not shown, with the clamping cylinders of the two clamping devices 22, 26.

In the FIGS. 3 and 4 an unloaded arrangement is shown in which no tensile force is applied to the suspension cable 108 and thus the suspension device 40. If the boring device 10 is to be pulled out of the borehole, a tension force is applied to the suspension rope 108 so that the suspension device 40 moves upwards into a line of gravity of the boring device 10, as in FIGS FIGS. 5 and 6 is shown. By this upward movement of the suspension device 40, the toggle lever 41 is pivoted, wherein the second lever arm 43 presses the actuating ram 55 downward, wherein the displacer 54 is pressed in the hydraulic cylinder 53 down.

In the hydraulic cylinder 53 and the hydraulic fluid reservoir 52 located hydraulic fluid is pressurized by this movement of the displacer 54. The thus pressurized hydraulic fluid can activate the clamping jaws 24, 28 of the two clamping devices 22, 26 by correspondingly actuating the associated clamping cylinders in such a way that the clamping jaws 24, 28 are reset and the clamping devices 22, 26 are reliably released. This release is thus achieved by the note power unit 50, even if the external power supply is interrupted. In this released position, the drilling device 10 can now be reliably retrieved via the suspension device 40 to the drilling rig 100. The mechanism with the knee lever 41 thus represents an automatic trip unit 58 for releasing the clamping devices 22, 26 represents.

In the FIGS. 7 to 12 a modified arrangement of an emergency power unit 50 is shown in which the trip unit 58 for releasing the clamping devices 22, 26 is also formed mechanically. In this case, the note energy unit 50 on the upper side of a plate of the support frame 12 has a hydraulic cylinder 53, which simultaneously forms a hydraulic fluid reservoir 52 of the note energy unit 50. Within of the hydraulic cylinder 53 is a displacer 54 movably mounted, which extends outwards to an actuating punch 55. The hydraulic cylinder 53 is arranged centrally on the circular disk-shaped plate of the support frame 12.

At the upper end of the actuating plunger 55, the suspension device 40 is articulated for the operating cable 108. In an unloaded state, the actuation plunger 55 and the associated displacer 54 are within the hydraulic cylinder 53, as in FIGS FIGS. 7 to 9 is shown.

Upon application of a tensile force on the suspension device 40, as is required, for example, when retrieving the drilling device 10 from a borehole, the actuating piston 55 and the displacement piston 54 connected thereto are moved upwards relative to the hydraulic cylinder 53. As a result, hydraulic fluid is pressurized in an upper chamber of the hydraulic cylinder 53. This hydraulic fluid can, via hydraulic lines, not shown, as described above, the clamping cylinder of the clamping devices 22, 26 actuate to reset the jaws 24, 28 and to release the drilling device 10.

According to Fig. 13 a further embodiment of the invention is shown, wherein the note power unit 50 has a battery 56 on the support frame 12. The battery 56 is connected via a controller, not shown, to a receiver 62 at an upper end of the support frame 12. The receiver 62 represents a part of the trip unit 58, wherein a control signal for releasing the clamping devices 22, 26 is transmitted via a transmitter 60 remote from the drilling device 10. The transmitter 60 may be located in particular on the drilling rig 100.

Upon receipt of a trigger signal emitted by the transmitter 60, the trip unit 58 activates the battery 56 so that the jaws 24, 28 of the two chucks 22, 26 are electrically reset from a cocking position.

Instead of the illustrated battery 56 may also be another energy storage, such as a pressure vessel may be provided with a hydraulic fluid which is actuated upon receipt of a trigger signal from the trip unit 58 to reset the jaws 24, 28 hydraulically.

Claims (12)

Drilling device for creating a hole with a drilling drive (14), a drilling tool (20) which is drivable in rotation by the drill drive (14), a support frame (12) on or in which the drill drive (14) and the drilling tool (20) are mounted, wherein the support frame (12) is designed to be arranged on or in a support tube or in the bore, - At least one clamping device (22, 26) which is designed for releasably clamping the support frame (12) on the support tube or in the bore, - A suspension device (40) on the upper side of the support frame (12) for suspending the drilling device (10) and at least one connection device (48) for connecting an external energy supply, characterized, that an emergency power unit (50) is provided on the support frame (12), - That the Notenergieeinheit (50) with the clamping device (22, 26) is connected to release the clamping and - That a trip unit (58) is provided, through which the Notenergieeinheit (50) for releasing the clamping device (22, 26) can be activated. Drilling device according to claim 1,
characterized,
the at least one clamping device (22, 26) has at least one tensioning cylinder. Drilling device according to claim 1 or 2,
characterized,
that the tensioning device (22, 26) is electrically actuatable via a drive and
in that the note energy unit (50) comprises an electric battery (56). Drilling device according to claim 2 or 3,
characterized,
in that the note energy unit (50) comprises a hydraulic fluid reservoir (52) which is connected via a hydraulic line to the clamping cylinder of the tensioning device (22, 26). Drilling device according to one of claims 1 to 4,
characterized,
that by the trip unit (58), the emergency power unit (50) is activated when the drilling device (10) is retracted with interrupted external power supply via the suspension device (40) of the support tube or the well bore. Drilling device according to one of claims 1 to 5,
characterized,
that the trigger unit (58) is arranged in the region of the hanger (40). Drilling device according to one of claims 1 to 6,
characterized,
in that the trigger unit (58) has a receiver (62) for receiving a triggering signal which is emitted by a transmitter (60). Drilling device according to one of claims 4 to 7,
characterized,
in that the note energy unit (50) has a hydraulic cylinder (53) in which a displacer piston (54) is displaceably mounted, and
in that the displaceable displacer piston (54) is connected to the suspension device (40), wherein upon application of a tensile force to the suspension device (40) by the displacer piston (54), hydraulic fluid in the hydraulic cylinder (53) is pressurized. Drilling device according to claim 8,
characterized,
that the suspension means (40) directly on the displacement piston (54) is arranged. Drilling device according to one of claims 1 to 9,
characterized,
that on the upper side of the supporting frame (12) comprises a knee lever (41) is pivoted,
in that the suspension device (40) is connected to a first lever arm (42) of the toggle lever (42) and
that a second lever arm (43) of the toggle lever (42) having an actuating plunger (55) for moving the displacer (54) is in operative connection. Drilling method for creating a hole in which - By means of a drilling device (10) in a reason, in particular a body of water, the bore is introduced, - The drilling device (10) by means of at least one clamping device (22, 26) is clamped to a support tube or in the bore, - By rotating a driving tool (20) of the drilling device (10) soil material is removed and a power required for drilling is supplied via a connection device (48) via an external power supply, characterized, - That a drilling device (10) according to one of claims 1 to 10 is used and in that the tensioning device (22, 26) is connected to an emergency energy unit (50) on a support frame (12) of the drilling device (10), the emergency energy unit (50) being triggered by a release unit (58) for releasing the tensioning device (22, 26) is activated. Drilling method according to claim 11,
characterized,
in that activation of the note energy unit (50) occurs when the external power supply is interrupted and / or the drilling device (10) is pulled out of the support tube.

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