EP1580325A1 - Hopper for holding concrete and method of withrawing a mouldpipe off a bore and method of cementing a bore - Google Patents

Abstract

Pipe bunker (10) for receiving concrete (24) to fill a bore hole (22) comprises a container base body with at least one inlet opening for filling the concrete and one outlet opening for discharging the concrete. In the region of the outlet opening the container base body is designed for connection to a bore hole tubing (20) and is provided with a closing device (18) for closing the outlet opening. Independent claims are also included for: (1) Device for removing a multi-part bore hole tubing from a bore hole and for filling the bore hole; and (2) Process for removing a multi-part bore hole tubing from a bore hole and for filling the bore hole.

Description

In a first aspect, the invention relates to a tubular bunker for receiving concrete for filling a borehole. In In other aspects, the invention relates to a device and a method for extracting a multi-part Drill pipe from a borehole and to fill the borehole.

It is known to stabilize the soil concrete piles in to set the ground. To do this, using multipart Drill pipes drilled suitable holes, which are then filled with concrete. To be unstable Soil after breaking in the walls of the borehole to avoid the extraction of the drill pipe, the filling takes place with concrete immediately when pulling out the drill pipe.

In this context, it is known to pass through the liquid concrete guide the drill pipe into the borehole.

Since the volume to be filled in the borehole with concrete is greater as the inner volume of the drill pipe to be pulled out has to to completely fill the borehole, to deliver concrete from above become.

Since the drill pipes have considerable lengths, the extraction is and filling a borehole so far very expensive.

The object of the invention is to provide a device with which the filling of a borehole when pulling out of the drill pipe is significantly facilitated. In addition, an apparatus and a method for extracting a multi-part drill pipe from a borehole and to fill the borehole to be specified.

This object is achieved in a first aspect of the invention solved by the tubular bunker with the features of claim, 1. In further aspects of the invention, this object is achieved by the device with the features of claim 9 and by the method with the features of claim 15 solved.

Advantageous embodiments of the tubular bunker according to the invention and the device according to the invention and preferred Variants of the method according to the invention are the subject of Dependent claims.

According to the invention, a pipe bunker for receiving concrete for filling a borehole, which forms a container body with at least one inlet opening for filling of the concrete and with an outlet opening to the outlet of the concrete , wherein the container body in the region of Outlet opening is formed for connecting a drill pipe and wherein in the region of the outlet opening a closure device is provided for closing the outlet opening.

As a first core idea of the invention can be considered for subsequent delivery of the concrete for filling a borehole to provide a pipe bunker when pulling out the drill pipe, the essentially of a container body with a Inlet opening for filling the concrete and with an outlet opening exists for the exit of the concrete and in the area of Outlet opening formed for connecting a drill pipe is.

A first significant advantage of such a tubular bunker is to see that the subsequent delivery of concrete so special reliably can be accomplished. Furthermore the pipe bunker according to the invention is particularly simple and can thus be manufactured inexpensively.

In a particularly simple variant, the container body essentially a cylindrical shape with an inlet side and / or outlet side conical end region on. The container body can then for example from a Be made of steel tube. To have a high storage volume for To achieve the liquid concrete, it is expedient to the container body significantly increased with respect to the drill pipe Diameter form. For example, the diameter of the container body twice as large to three times be big like that of the drill pipe. The angle of the conical End region on the outlet side is preferably chosen as that the liquid concrete can flow off easily. Appropriately, this angle is about 45 °. Because this requirement not given at the inlet side conical end is, this end area can be kept flatter. hereby can be higher at substantially the same outside dimensions Storage capacity of the tubular bunker can be achieved.

The connection to the drill pipe or the connection with a Concrete supply line is particularly easy when on the inlet end portion an inlet nozzle and / or on the outlet end portion provided an outlet is.

In a preferred embodiment, the drilling torque via the pipe bunker to transfer the drill pipe, the Outlet neck rotatably connected to the drill pipe.

In a simple way, the torque of a rotary drive on be transferred to the pipe bunker, if also the inlet nozzle designed for non-rotatable connection with the rotary drive is. Such rotationally fixed connections can by suitable Internal or external gears are provided.

In a particularly preferred variant, the closure device designed as a hinged flap. This is easy and therefore cost feasible and guaranteed In addition, a high level of operational safety.

In this context, it makes sense if the flap around a centrally arranged axis is pivotable. Also pending Concrete pressure can then flap with a minimum of forces be opened and closed.

The closure device can in principle in any way be operated. Especially easy and reliable can Locking device but hydraulically or mechanically operated become.

The inventive device for extracting a multi-part Drill pipe from a borehole and to fill the Borehole has a tube bunker according to the invention, as above described, and a lifting device for holding, lifting and lowering the tubular bunker and possibly attached thereto Drilling tube on. With such a device, the in particular for carrying out the following Method is suitable, the withdrawal of a designed multi-part drill pipe from a borehole and filling the borehole with concrete particularly easy.

In a situation where a downhole Drill pipe is covered by the pipe bunker, to prevent the drill pipe sinks into the wellbore, the device can expedient a fixing device for holding the drill pipe exhibit. This may be, for example, a hydraulic Gripping or clamping device act, if necessary is pressed. For actuating the closure device the tubular bunker and / or for actuating the fixing device is expediently provided a hydraulic device.

In a particularly reliable design is also the lifting device hydraulically or mechanically actuated.

A further preferred variant is characterized that the lifting device has a carriage which is connected to a vertical guide is slidably disposed.

At this slide the tube bunker can be rotatably mounted. In a useful variant but is on the carriage Rotary drive arranged for the drill pipe, which in turn with the pipe bunker is rotatably connected.

In the inventive method for pulling out a multi-part drill pipe from a borehole and to fill the drill hole is the drill pipe along with one end mounted pipe bunker as far as pulled out of the borehole, until a drilling element is exposed. The tube bunker is then closed and the exposed drill pipe member is of the Pipe bunker and possibly further, still in the borehole dissolved drill pipe elements solved. The pipe bunker becomes then moved down and with the next drill pipe element connected. Then the tube bunker is opened again, allowing concrete to flow through the drill pipe into the wellbore. These steps are repeated until the drill pipe is complete pulled out and the hole is filled with concrete.

A core idea of the method according to the invention can therein seen, a multipiece drill pipe no longer as a whole to pull out of the borehole but rather only so far until a single pipe element is exposed and removed can be. In this context, the inventive Use pipe bunker particularly advantageous.

An essential advantage of the method according to the invention is to see that the design effort to pull out of the drill pipe can be significantly reduced because In principle, only one lifting height is necessary, which is essentially corresponds to the length of a drill pipe element. On This way, significant costs can be saved.

By the simultaneous filling of the concrete is also the Penetration of water into the hole prevented.

In a particularly preferred variant of the method is a downhole solved by the lifting device or to be solved drill pipe while the exposed Drill pipe element is removed. In this way can prevent sinking or sinking of the drill pipe into the wellbore become.

The connection between pipe bunker and drill pipe, for example be formed so that the release of the tubular bunker from the drill pipe by a short turn against one Drilling direction can be done.

To complete as complete as possible the hole with concrete In addition, it is useful if the concrete is introduced under pressure into the borehole.

Further features and advantages of the tubular bunker according to the invention, the device according to the invention and the invention The method will be described below with reference to FIGS attached schematic figures described.

Fig. 1

eine perspektivische Ansicht eines erfindungsgemäßen Rohrbunkers;

Fig. 2

eine Frontansicht des in Fig. 1 gezeigten Rohrbunkers;

Fig. 3

eine perspektivische Ansicht einer Verschlusseinrichtung für einen erfindungsgemäßen Rohrbunker;

Fig. 4

eine axiale Vorderansicht der Verschlusseinrichtung aus Fig. 3:

Fig. 5

eine Draufsicht auf die verschlusseinrichtung aus Fig. 3;

Fig. 6

eine Schnittansicht der Verschlusseinrichtung aus Fig. 3 entlang der Linien A-A in Fig. 4;

Fig. 7

eine Schnittansicht der Verschlusseinrichtung aus Fig. 3 entlang der Linien B-B in Fig. 5; und

Fig. 8

eine schematische Darstellung eines Ausführungsbeispiels einer erfindungsgemäßen Vorrichtung.

There show:

Fig. 1

a perspective view of a tube bunker according to the invention;

Fig. 2

a front view of the pipe bunker shown in Figure 1;

Fig. 3

a perspective view of a closure device for a tubular bunker according to the invention;

Fig. 4

an axial front view of the closure device of Fig. 3:

Fig. 5

a plan view of the closure device of FIG. 3;

Fig. 6

a sectional view of the closure device of Figure 3 along the lines AA in Fig. 4.

Fig. 7

a sectional view of the closure device of Figure 3 along the lines BB in Fig. 5. and

Fig. 8

a schematic representation of an embodiment of a device according to the invention.

An embodiment of a tubular bunker 10 according to the invention will be described in connection with Figs. 1 and 2. equivalent Components are each identified by the same reference numerals.

The tubular bunker 10 according to the invention consists essentially of a container body 12, to the inlet side and connect conical end areas 28, 30 on the outlet side. about an inlet opening 14 may be liquid concrete in the pipe bunker 10 enter and from an outlet opening 16 in a Emerge drill pipe. To the inlet-side conical end region 20, an inlet port 32 connects to the non-rotatable Connecting with a rotary drive with external toothing 33 is provided. As shown in Fig. 2, are in the inlet-side conical end portion 28 a plurality of openings 17th designed for filling the tubular bunker 10 with concrete but can also serve for venting.

The outlet end portion 30 has compared to the inlet side conical end portion 28 a steeper angle on, thereby ensuring a safe drainage of liquid concrete becomes.

The outlet-side conical end region 30 closes an outlet nozzle 34 in which a closure device 18 for closing the outlet opening 16 is integrated.

Such a closure device 18 will be described below Referring to Figs. 3 to 7 described. The one shown there Closing device 18 is designed as a flap closure and consists essentially of a tubular body 19, in which a flap 26 about a central axis 36 pivotally is arranged. The tube body 19 can itself as a connecting piece be formed for the pipe bunker. To operate, in particular by means of a hydraulic device is laterally on the tubular body 19 an adjusting device 42 provided. To a defined position of the flap 26 to allow in a closed state are on the Inside the tubular body 19 a total of six Stopper pins 44 positioned at equal angular intervals. The exact position of these stop pins 44 is particular clearly seen in FIGS. 4 and 6.

In order corresponding to a defined position of the flap 26 in one To ensure open position are also two Stop struts 46 in the interior of the tubular base body 19th arranged. This is particularly clear in FIGS. 3, 4, 6 and 7 shown. A limitation of the movement of the flap 26 in the closed and / or open position can of course also accomplished with differently shaped stop elements become. By the stop struts 46 is in particular a possible fluttering of the flap 26 at high concrete throughput prevented.

In Fig. 8 is an embodiment of an inventive Device 40 shown schematically.

Essential component of the device 40 according to the invention is an inventive pipe bunker 10, the rotation with a Rotary drive 56 is connected. In addition, the tube bunker 10 connected via the rotary actuator 56 with a lifting device 50. The rotary drive 56 is on a carriage 54 as part of Lifting device 50 attached. Along a vertical guide 52 is the carriage 54 in the vertical direction by means of a Hydraulic adjustable.

At the bottom of the tubular bunker 10 is as part of a drill pipe 20 a drill pipe element 21 via a coupling 23 rotatably arranged. The coupling 21 can counteract by turning briefly a Bohrdrehrichtung be solved.

In Fig. 8, a situation is shown in which the Drill tube 20 partially in a introduced into the ground 60 Drill hole 22 is located.

In the method according to the invention is now the drill pipe 20th with the help of the lifting device 50 raised until the Drill pipe element 21 is completely above the ground 60 and thus can be removed. For this purpose, the tube bunker 10th with the help of the schematically illustrated flap 26 of the closure device 18 closed, so no liquid concrete 24 more can escape from the tube bunker 10. Subsequently is the Bohrrohrelement 21 of the tubular bunker 10 and the subsequent drill pipe element 25 solved. The drill pipe element 25 can then be useful with the help of a fixing device be held to prevent it from entering the borehole 22 drops.

In the next step of the tubular bunker 10 with the help the lifting device 50 is lowered and with the next drill pipe element 25 connected. After opening the flap 26 can more Concrete 24 flow into the wellbore 22 and the above Steps may be repeated until the drill pipe 20 completes, if necessary with the drill bit, from the borehole 22 pulled out and the borehole 22 completely with concrete 24th is filled.

With the tube bunker according to the invention, the inventive Device and the method according to the invention is the extraction of multi-part drill pipes from a borehole and the simultaneous filling of the borehole with concrete in particular simple way and with significantly reduced apparatus Effort possible and it can therefore to a considerable extent Cost savings.

Claims (17)

Pipe bunker for receiving concrete (24) for filling a borehole (22),
with a container base (12) having at least one inlet opening (14, 17) for filling the concrete (24) and with an outlet opening (16) for the exit of the concrete, wherein the container base (12) in the region of the outlet opening (16) for connecting a Drill tube (20) is formed and
wherein in the region of the outlet opening (16) a closure device (18) for closing the outlet opening (16) is provided. Pipe bunker according to claim 1,
characterized in that the container base body (12) has a substantially cylindrical shape with an inlet-side and outlet-side conical end region (28, 30). Pipe bunker according to one of claims 1 or 2,
characterized in that an inlet pipe (32) is provided on the inlet-side end region (28) and an outlet nozzle (34) is provided on the outlet-side end region (30). Pipe bunker according to one of claims 1 to 3,
characterized in that the closure device (18) is designed as a pivotable flap (26). Pipe bunker according to claim 4,
characterized in that the flap (26) about a centrally disposed axis (36) is pivotable. Pipe bunker according to one of claims 1 to 5,
characterized in that the closure device (18) is hydraulically or mechanically actuated. Pipe bunker according to one of claims 3 to 6,
characterized in that the outlet nozzle (34) is designed for non-rotatable connection to the drill pipe (20). Pipe bunker according to one of claims 3 to 7,
characterized in that the inlet nozzle (32) is designed for non-rotatable connection to a rotary drive (56). Device for extracting a multi-part drill pipe (20) from a borehole (22) and for filling the borehole (22), in particular for carrying out the method according to one of claims 15 to 18,
marked by
a pipe bunker (10) according to any one of claims 1 to 8 and
by a lifting device (50) for holding, raising and lowering the tubular bunker (10) and the drill pipe (20). Device according to claim 9,
characterized in that a fixing device is provided for holding a drill pipe (20) to be detached from the lifting device (50). Device according to one of claims 9 or 10,
characterized in that a hydraulically or mechanically operable device is provided for actuating the closure device (18) of the tubular bunker (10). Device according to one of claims 9 to 11,
characterized in that the lifting device (50) is hydraulically actuated. Device according to one of claims 9 to 12,
characterized in that the lifting device (50) has a carriage (54) which is displaceably arranged on a vertical guide (52). Device according to claim 13,
characterized in that a rotary drive (56) for the drill pipe (20) is arranged on the carriage (54). Method for extracting a multi-part drill pipe (20) from a borehole (22) and for filling the borehole (22),
characterized in that the drill pipe (20) together with an end-mounted pipe bunker (10) so far out of the borehole (22) is pulled out until a drill pipe element (21) is exposed,
that the tubular bunker (10) is closed,
that the exposed drill pipe element (21) is released from the pipe bunker (10),
moved that the pipe bunker (10) downward and is connected to the next drill pipe (21),
that the tubular bunker (10) is reopened so that concrete (24) can flow through the drill pipe (20) into the wellbore (22) and
that the aforementioned steps are repeated until the drill pipe (20) is completely pulled out and the borehole (22) is filled with concrete. Method according to claim 15,
characterized in that a drill pipe (22) located in the wellbore (22) and to be released from the pipe bunker (10) is retained while the exposed drill pipe member (21) is removed. Method according to one of claims 15 or 16,
characterized in that the concrete (24) is introduced under pressure into the borehole (22).

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