JPS5816436B2 - Drilling equipment for underground drilling - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a drilling device for underground drilling, and more particularly to a drilling device for dry drilling and flowing water drilling in which planting material is returned through a drill rond.

The drilling device has a drive mechanism for generating a feed load for the drill tool and includes a feed device that can enter the drill hole together with the drill tool, and a feed device that is attached to the wall of the drill hole to absorb the reaction force from the feed device. and a support device to be supported.

The entire line of underground drilling methods requires strong pressing forces on the tool.

As a result, drilling rigs are known in which a feed device and a support device are advanced into the drilling hole together with the drilling tool.

In known devices of this type, the drive mechanism for generating the feed load consists of a plurality of hydraulic cylinders arranged around the outer circumference.

The mechanism for generating the support load consists of a cylindrical support member actuated by hydraulic cylinders arranged in a segmented manner around the outer periphery.

Such a plurality of hydraulic cylinders on the one hand increases the construction and component costs considerably and, on the other hand, because the hydraulic cylinders for generating the supporting load are activated before the hydraulic cylinders for generating the feed load, it is especially difficult for continuous switching. Requires a very careful regulatory control mechanism.

Several hydraulic cylinders with supply lines and control mechanisms have particular disadvantages, especially when having high pressure loads.

Furthermore, the known support devices have the disadvantage that they only reach a point or line contact with the excavated wall, so that they penetrate only at certain points within a given excavation hole.

For this reason, the known devices can only drill framed boreholes or boreholes in solid rock.

Furthermore, in known drilling rigs, the plurality of hydraulic cylinders limits the overall safety of the operation of the drilling rig, especially with regard to constant provision of both the feed load and the supporting force.

It would therefore be desirable to be able to provide an excavation rig of the type described above having a feed load and support force generation mechanism whose construction and control are substantially simplified and whose operational safety is substantially improved.

Furthermore, when activating each pressure-generating mechanism, it must be provided that the medium 1 used throughout the drilling of the hole, for example water or pressurized air, can be used.

According to the present invention, a drill tool, a tool feeder having a power mechanism for generating a feed load for the drill tool and capable of entering into an excavated hole together with the drill tool, and a reaction force from the tool feeder are provided. a feed piston connected to the drill tool and arranged concentrically about the longitudinal axis of the drill tool; the feed piston and the support device; at least one transfer bellows disposed between and arranged to roll on the wall of the tubular member, a portion of the support device supporting the transfer bellows and adjacent the drilling tool; The present invention provides an excavating device for underground drilling, the surface of which forms the face wall of the feed cylinder.

As a result, in a completely parallel arrangement, only one cylinder space is required which is acted upon by the respective pressure medium, which cylinder space extends over the entire circumference of the device and is constant at the feed piston. A simple load will be applied.

The structure of the device is such that a concentric feed piston with a transfer bellows is formed, and the support device itself supports at least the face wall of the feed cylinder, and also in a simpler and more concentric manner than the transfer bellows rolls on the cylinder wall soil. Since the structure is formed with a corresponding structure, it is substantially simplified.

A cylinder space for generating the feed load can be pressurized in such a way that not only the structural arrangement but also the feed line and control are simplified.

A pressure medium is generally available during the formation of the borehole for the pressurization of the cylinder space closed by the transfer bellows for the generation of the feed load.

For example, water or pressurized air can be used.

Due to the simple construction and provision of feed lines and control systems, the safety of operation of the drilling rig is substantially improved.

One aspect which further simplifies the drilling rig both structurally and operationally is that according to an embodiment of the invention the shifting bellows extend between the outer wall of the feed piston and the circumference of the face wall of the feed cylinder and In use, it is obtained by freely placing the excavated wall soil in such a way that it rolls during the movement of the feed piston.

In this way, a well-enclosed external support over the entire circumference of the support device can be obtained in a simple manner.

This fact makes it possible to drill even in loose rock walls, since the transfer bellows used for support can be arranged in a tight fit against the wall over the entire circumference of the borehole. It gives you the advantage of being able to.

A further important advantage is that only one pressure medium action of the entire cylinder space formed by the feed piston, the face wall of the feed cylinder and the two shifting bellows is required for the generation of the feed load as well as the generation of the support load. That's what it means.

The control of the drilling rig is thereby greatly simplified.

Each side of the transfer bellows wall used can always be dimensioned in any suitable manner to obtain the desired load.

The advantage is that the surface pressure between the transfer bellows and the borehole wall, which generates supporting loads in relation to the loads on the borehole wall, is extremely low compared to a separate mechanical support device.

Flowing water drilling (f
According to a further embodiment of the invention, the part of the support device supporting the transfer bellows is provided for use with a drill tool for rush drilling) for enclosing the drill rod in the direction of the feed piston. extending within a tubular housing, a feed piston being formed as an annular piston surrounding said tubular housing, and a transfer bellows connecting an end of the tubular housing adjacent the face wall and an inner periphery of the end of the annular piston adjacent the face wall; A particularly advantageous and simple construction of the drilling device is obtained by the arrangement between the outer circumference of the face wall and the outer circumference of the end of the annular piston adjacent to the face wall.

The result is a simple and completely concentric arrangement with a single pressurized space.

The surface of the feed piston effective in the feed direction can be selected to be as large as desired.

Furthermore, this concentric arrangement allows the use of the tubular housing as a return moment support for the transmission of recoil moments from the drilling tool via the annular piston to the tubular housing of the support device.

In order to generate a particularly constant support load in relation to the respective feed load, in another embodiment of the invention the support load is applied to the borehole wall in such a way that the support load is generated in the rest position of the feed piston. It is advantageous if the outer surface of the externally displacing bellows is always dimensioned larger than the surface of the feed piston effective in the feed direction.

In this way it is always ensured that the support device in the borehole wall is confined under pressure before starting the rotational movement of the drill tool and before starting the feed load.

If a drilling rig of the type described above is provided for dry drilling, then according to another embodiment of the invention it is provided that the part of the support device supporting the transfer bellows is constructed as a cylinder that is open towards the excavation surface. a feed piston extending concentrically with and spaced apart from the cylinder shell, and a transfer bellows between an inner wall end of the cylinder shell adjacent the closed end and an outer wall end of the feed piston adjacent the support device. By arranging the excavating device in the same manner as in FIG.

In this way, on the one hand, a simple arrangement and fastening of the rolling bellows is obtained and, on the other hand, the cylinder wall is configured in a simple manner for rolling of the rolling bellows.

Also, an advantageous concentric structure is obtained in this case, in which a pressure space extending around the entire circumference can be easily created.

Next, the present invention will be described in detail with reference to embodiments shown in the accompanying drawings.

The drilling equipment shown in Figures 1 and 2 is a flowing water drilling (fl)
This is for performing ush drilling.

A drill tool 1 is mounted on a drill rod 2 in a known manner.

A rotating device 8 is mounted between the drill rod 2 and the drilling tool 1, and the rotating device 3 can be introduced into the drilled hole.

The drill rod 2 is surrounded by an upper cylinder part 4 of a support device arranged in the upper part of the drilling rig.

The upper cylindrical part 4 of the support device extends in the direction of the drill tool 1 into a tubular housing 5 surrounding the drill rod 2 .

This tubular housing 5 is surrounded by an annular piston 6 constituted by an outer housing 1 and an inner housing 8.

Further, the outer casing 7 extends downward concentrically with the non-rotating portion of the rotating device 3 as indicated by reference numeral 9, and is firmly fixed to the non-rotating portion.

The tubular housing 5 of the support device forms a torque support for the rotating device 3 and thus has a plurality of projections 10 arranged at intervals on its outer periphery, which projections 10 are connected to the annular piston 6. It is possible to slide in the axial direction within the vertically long slit 11 of the inner housing 8 of.

The surface of the upper cylinder part 4 of the support device close to the drill tool forms the axial pressure face wall 12 of the feed cylinder, which will be described below.

Annular surface 13 of feed piston 6 away from the drill tool
forms the axial pressure surface for the feed piston 6.

A transfer bellows 16 is arranged between the end 14 of the tubular housing 5 remote from the drill tool and the end 15 of the annular piston 6 or its inner housing 8 remote from the drill tool 1, which The moving bellows 16 rolls on the tubular housing 5 on the one hand and on the inner housing 8 of the annular piston 6 on the other hand.

Furthermore, a further shifting bellows 18 extends between the outer circumference 17 of the face wall 12 and the outer circumference of the end 15 of the annular piston 6 remote from the drilling tool.

This rolling bellows 18 rolls on the outer housing 7 of the annular piston and on the inner wall of the borehole 19.

Furthermore, as shown in FIG. 1, in the rest position of the annular piston 6, the outer surface of the outer rolling bellows 18, which is laid against the wall of the wellbore, is located at the surface 1 of the feed piston acting in the feed direction.
The size is larger than 3.

As a result, a cylindrical space is formed between the face wall 12 and the face wall 13 and between the walls of the rolling bellows 16 and 18.

The cylindrical space can be pressurized with a suitable pressure medium by means of a schematically illustrated supply line 20, and when pressurized,
Pressure space for feeding the annular piston 6 and transfer bellows 18
This acts as a pressure space for supporting the entire drilling rig against the borehole wall 19.

To obtain better centering of the entire drilling rig,
A plurality of support members 21 are arranged at regular intervals in the axial direction and at a distance on the outer periphery.

Figures 2a and 2b show two end positions of the feed device.

FIG. 2a shows the annular piston 6 in its fully extended position, in which the inner rolling bellows 16
on the tubular housing 5, on the other hand an outward rolling bellows 18
is fully supported on the borehole wall 19.

FIG. 2b shows the stopping position similarly illustrated in FIG. 1 as an illustration of the opposite position.

FIG. 3 schematically shows a switching circuit for controlling the excavation rig shown in FIG. 1 or FIGS. 2a and 2b.

Compressor 22 consists of two rolling bellows 16 and 18
Generates the pressurized air necessary to feed and support the

A connection 23 to the atmosphere is provided.

From the main valve 24, a supply line 25 is guided from the ground to each device in the wellbore located on the drilling rig.

The line 25 is guided on the one hand by a non-return valve 26 into the schematically illustrated pressure space formed by the two transfer bellows 16 and 18.

On the other hand, said line 25 leads to a control valve 27 and is further guided by a non-return valve 28 and an opposite non-return valve 29 to a pressure relief line 30 in the borehole.

The end of the pressure release line 30 is disposed at the bottom of the deepest position of the pressure space formed by the transfer bellows to obtain a pressurized chamber effect.

Finally, the line 31 passing through the control valve 27 is connected to the transfer bellows 1
From the pressure space formed by 6 and 18 is led a connection point between two non-return valves 28 and 29.

- When pressurizing, the valve 24 is primarily in its lower position, so that pressure flows into the line 25.

The control valve 27 is set in its closed position and the pressure medium passing through the check valve 26 is supplied to the pressure space formed by the transfer bellows 16 and 18.

With the aid of the illustrated control device, the pressure between both bellows and the drilled hole is equalized when the drill tool is retracted.

In the stopped state, but with both rolling bellows 16 and 18 not yet collapsed, the main valve is set in its upper position, i.e. in the connecting position with atmospheric outlet 23, and both rolling bellows are then in the borehole. collapsed under the pressure of

In this state, the pressure medium flows into the borehole through the release line 30 by means of the control valve 27 and the non-return valve 29 which are switched into the borehole.

The end of the sharp release line 30 shown in the figure is a double rolling bellows 1.
6 and 18, it is clear that a compression chamber effect is obtained.

FIGS. 4a and 4b show another embodiment of the drilling apparatus according to the invention for use in dry excavation.

A drill tool 40 configured as a hinged drill bit with its feed device and its support device has entered a drilled hole 41 .

Furthermore, the drill tool 40 is connected to a rotating device 42 .

The non-rotating part of the rotation device 42 is connected to a longitudinally slidable outer cylindrical portion 43, which acts as the outer part of the support device.

A cylinder 44 is rotatably fixed in the outer tubular part 43 and arranged so as to be slidable in the longitudinal direction, which cylinder 44 is open towards the drilling tool 40 and simultaneously connects the inner part of the support device with the feed cylinder. It forms a surface 45.

Concentrically within and at a distance from the inner wall of the housing of the cylinder 44 extends a feed piston 46 for the feed device having a piston surface 47 so as to be slidable in the longitudinal direction.

The non-rotating part of the rotating device 42 is evenly and rigidly fixed to the feed piston 46 for transmitting the feed load to the drilling tool 40.

A further cylindrical part 48 is provided for this connection, which is fixed to the inner wall of the feed piston 46.

A compression spring 49 is arranged between the outer cylindrical part 43 of the support device and the release cylinder 44, and the compression spring 49 keeps the cylindrical part 43 and the cylinder 44 in the position shown in FIG. 4 during excavation operations. to hold.

The cylindrical portion 43 is slidable downwardly after retraction of the excavator against the action of a compression spring 49 in order to release the hinged excavator 40 by means of a rod 50.

The transfer bellows 51 is arranged between the end 44a of the housing of the cylinder 44 remote from the drill tool 40 and the end 46a of the outer wall of the feed piston 46 remote from the drill tool 40.

A pressure space is thereby formed between the surface 45 of the cylinder 44 , the surface 47 of the feed piston 46 and the shifting bellows 51 , which supplies the pressure medium in order to obtain the feed of the feed piston 46 .

Furthermore, a bellows 52 is provided on the outer wall of the cylindrical housing, which is expandable against the borehole wall by means of a pressure medium and which supports the support device against the borehole wall via the pressure medium when pressurized. In this case, it is arranged on the outer wall of the outer cylindrical part 43.

When the bellows 52 is pressed against the borehole wall after introducing the drilling rig into the borehole 41, the support device is tensioned into the borehole so that the drilling operation can be started, after which the face 47 of the feed piston 46 The feed load is generated by pressurizing the pressure space above the upper transfer bellows 51.

The drilling tool 40 with its rotating device 42 is fed along the borehole by means of the feed piston 46 and the tube 48, and the support device is supported in the borehole 41 by the bellows 52.

[Brief explanation of the drawing]

The figures show an embodiment of the drilling equipment for underground drilling according to the present invention, in which Fig. 1 is a longitudinal cross-sectional view of the drilling equipment for cleaning type drilling having a drill tool supported by a drill rod, and Fig. 1a is a longitudinal cross-sectional view of the drilling equipment for cleaning drilling. Fig. 1 is a cross-sectional view taken along line A-B in Fig. 1; Fig. 2a is a sectional view similar to Fig. 1 schematically showing the fully extended working position; Fig. 2b schematically shows the resting position. A sectional view similar to Fig. 1, Fig. 3 is a circuit diagram for pressure medium control of the drilling rig shown in Fig. 1, and Fig. 4 is a longitudinal sectional view of the drilling rig showing another embodiment used for dry drilling. , FIG. 4a is a cross-sectional view taken along line A--A in FIG. 4. 1.40...Drill tool, 2...Drill rod, 3.42...Rotating device, 4...
... Upper cylindrical part, 5 ... Tubular housing, 6 ...
...Annular piston, γ...Outer housing, 8...
...Inner housing, 12...Face wall, 13...
... Annular surface, 16.18, 51.52 ... Transfer bellows, 17 ... Peripheral part of face wall, 19 ...
...Drilled hole, 44...Cylinder.

Claims (1)

[Scope of Claims] 1. A tool feeding device having a power mechanism for generating a feed load for a drill tool and capable of entering into an excavated hole together with the drilling tool, and a tool feeding device for absorbing reaction force from the tool feeding device. A feed piston connected to the drill tool and arranged concentrically about the longitudinal axis of the drill tool, and a part of the feed piston and the support device. and at least one rolling bellows disposed between the tubular member so as to roll on the wall of the tubular member, and supporting the rolling bellows and adjacent to the drilling tool. A drilling device for underground drilling, characterized in that the surface forms a face wall of a feed cylinder. 2. At least one of the rolling bellows extends between the outer wall of the feed piston and the outer periphery of the face wall of the feed cylinder, and when the device is used, the rolling bellows rolls on the excavated wall earth during movement of the feed piston. 2. The underground drilling device according to claim 1, wherein the drilling device is freely arranged as follows. 3. In a drilling rig used for flowing water drilling with a drill tool supported by a drill rond, a part of the support device supporting the transfer bellows extends into a tubular housing to surround the drill rond in the direction of the feed piston; The feed piston is formed as an annular piston surrounding the tubular housing, between the end of the tubular housing adjacent to the face wall on the one hand and the inner periphery of the end of the annular piston adjacent to the face wall and on the other hand the face wall. Excavation for underground drilling according to claim 1 or 2, characterized in that transfer bellows are disposed between the outer periphery of the ring-shaped piston and the outer periphery of the end of the annular piston adjacent to the face wall. Device. 4. Claims characterized in that, in the stop position of the feed piston, the outer surface of the outer rolling bellows, which is laid against the wall of the excavation hole, always has a larger dimension than the effective feed piston surface in the feed direction. The underground drilling device according to item 3. 5. In a drilling device for use in dry excavation, a part of the support device that supports the transfer bellows is configured as a cylinder that opens toward the excavation surface, and the feed piston is arranged concentrically and at a distance from the outer cylinder of the cylinder. Claims characterized in that the transfer bellows are arranged between an inner wall end of the outer cylinder of the cylinder adjacent to the closed end and an outer wall end of the feed piston adjacent to the support device. The underground drilling device according to item 1. 6. The drilling device for drilling in a pond according to claim 5, characterized in that a bellows which can be expanded against the wall of the drilling hole by a pressure medium is disposed on the outer wall of the outer cylinder of the cylinder.