Drilling machine with arc-like drill pipe holder

Details Drilling machine with arc-like drill pipe holder Drilling machine with arc-like drill pipe holder

2002-02-22

2004-03-09

Bagnell, David (Department: 3672)

Boring or penetrating the earth

With magazine for successively moving unconnected, oriented...

C175S085000, C414S022610

Reexamination Certificate

active

06702043

ABSTRACT:

BACKGROUND OF THE INVENTION
The invention concerns a drilling machine for doublehead or overlying drilling with a drill drive, a drilling unit for guiding it during longitudinal displacement, a pipe or a drill string consisting of outer and inner pipes as well as a drill pipe holder accommodating outer and inner pipes that fit into one another and having several pipe repositories, with a gripper transferring the pipes out of the drill pipe holder into the drilling axis and back being allocated to this drill pipe holder.
In mining operation, but also in other operations, drilling machines are used either for exploratory drilling in mountains or the underground or auger mining, or finally even also drilling in order to stabilize the underground in that solidification materials are pressed into the bore holes. For this drilling machines are used whose drill drive is moved back and forth on a drilling unit in order to generate the necessary counter pressure or thrust, while the drill drive operates in a rotating or rotating and striking manner. For overlying boring and for similar uses, double pipes are assembled as a drill string and introduced into the mountain. Since the individual outer and inner pipes in any given case are available only with a specified length, namely that of the drilling unit, an inner as well as an outer pipe must be connected to the drill string already situated in the mountain with corresponding advance in the drilling. Drill pipe holders, in which inner pipes are guided sliding into the outer pipes, serve for this. Inner and outer pipe are grasped simultaneously with the aid of a gripper and then pivoted into the drilling axis. A drilling machine is known from EP 0 565 502 in which the gripper moves in the x, in the y and in the z axis in order to swivel the double pipes into the drilling axis in this manner or to transfer them out of the drilling axis into the drill pipe holder. The known drill tube holder is constructed as a rectangle or square, whereby several double tubes are held in place in corresponding pipe depositories in each case, from which they are taken out with the grip member and appropriately pivoted. Here it is disadvantageous that with appropriate construction, both tubes are indeed grasped simultaneously by the grip member and swiveled into the drilling axis, but cannot be automatically brought back into the drill tube holder again during withdrawal. With the corresponding operation, the interior pipe is first l pulled altogether and in each case separated into segments and then deposited in the holder. Only later are the outer pipes also pulled, separated from each other and then brought into the drill pipe holder whereupon then, however, threading into each other is only possible by hand. This inhibits operations, quite apart from the fact that, owing to the weight of the individual pipes, these can only be handled at all up to a certain length. With longer pipe segments, special grippers must be used in order to place the pipes into one another and deposit them in the drill pipe holder. It is moreover disadvantageous that it is difficult to get close to the double pipes standing or deposited in the drill pipe holder with the gripper, because the gripper can only cover a specified distance. Although, pipe holders, for example, are also known on the basis of U.S. Pat. No. 5,556,253, in this case however not for double pipes, in which the pipes deposited one above the other in the drill pipe holder gradually slide into a position where they are grasped by the gripper and are brought into the drilling axis with an additional axial motion process and there are transferred to the drill drive or the drill string. This known gripper is, however, only usable on individual pipes. Were a double pipe consisting of outer and inner pipe to be grasped by the known gripper, no solution exists for how the gripper can grasp and then swivel both pipes separately. In addition, when filling the drill pipe holder, it is also necessary to operate manually even here, if one can conceive of it at all, in order to slide the outer pipe over the inner pipe or bring the inner pipe into the outer pipe.
SUMMARY OF THE INVENTION
Underlying the invention is therefore the task of creating a drilling machine with a drill pipe holder, which makes hand sorting of the pipes when drilling with outer and inner pipes superfluous.
The objective is accomplished in accordance with the invention in that the gripper is constructed rotatably about an axis and axially displaceably and has a telescoping supporting arm, and in that the drill pipe holder with its bag-shaped stationary pipe depositories is constructed and arranged about the axis of the gripper and at a distance thereto, forming a partial circle.
With a drilling machine constructed in this manner, it is possible when producing a bore hole to grasp separately the combined outer and inner pipes arranged in the drill pipe holder with the gripper and to swivel them together into the drilling axis in order then to connect them with the drill string or the drill drive. Since they are arranged correspondingly in the drill pipe holder, the gripper can grasp and appropriately swivel both in order to pull both tubes out of the drill pipe holder provided with the bag-shaped pipe depositories and then to rotate or pivot them into the drilling axis, while the gripper is able to rotate about the specified axis and axially displaceable in it during this process. The gripper can be brought to the pipe depository through the telescoping supporting arms in order to lock the outer and inner pipes into position and then take them out of the bag. These bag-shaped pipe depositories have the advantages that they not only fix the outer and inner pipes into position and that both can be grasped because the inner pipe projects somewhat out of the outer pipe, but it is also possible to arrange the inner pipes or outer pipes initially separate from each other in the drill pipe holder in order then to bring the still lacking pipe with the same gripper into the already deposited or about the already deposited pipe. This means that after drilling, all inner pipes can first be pulled out and separated from one another without difficulty, and then deposited in the drilling pipe holder before then pulling out the outer pipes as well after further operations, separating them from one another and then sliding an outer pipe over an inner pipe, whereby the gripper as depicted further above can carry out the corresponding operations because it is rotatable about the axis and at the same time axially displaceable. The drill pipe holder with its bag-shaped pipe depositories then ensures in this connection that the already inserted inner pipe is fixed in position and arranged such that one can also slide the outer pipe over it with the gripper. Both are then fixed in position in the pipe repository after arranging in the drill pipe holder such that it is possible without difficulty to grasp the two pipes again as needed with the gripper and to bring them correspondingly into operation.
According to a useful embodiment of the invention, it is provided that the axis of the gripper is arranged over the drilling unit beams but such that they are connected with it through cross beams, and is arranged displaceably on a sliding track allocated to the cross beams parallel to the drilling axis or the drilling unit beam. As already mentioned further above, it is therewith possible to pull the two pipes with the gripper out of the respectively allocated pipe repository, or possibly to place them back in there, individually or together, i.e. to insert them. Axis and drilling unit or drilling unit beams always have the same distance so that it is assured that when the gripper is appropriately rotated or swiveled about its axis, the pipes land exactly in the drilling axis, whereby corrections are also possible through appropriate construction of the gripper.
In order to ensure in a simple and useful manner that the two pipes, i.e. the outer and inner pipes, can be grasp

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