Boring or penetrating the earth – With below-ground tool drive prime mover – With below-ground feed means
Patent
1995-11-01
1997-03-25
Neuder, William P.
Boring or penetrating the earth
With below-ground tool drive prime mover
With below-ground feed means
175 99, E21B 302
Patent
active
056135688
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
The invention relates to a rock drilling machine of the self-feeding, integrated type which is designed to operate in situ in a drill hole.
BACKGROUND OF THE INVENTION
Deviations from the planned hole direction constitute a major problem when drilling long holes in the bedrock. This is especially true when the holes are directed up above the horizontal plane. The methods which are currently employed all presuppose the use of drill hole tubing, which makes both monitoring and directional adjustment impossible. In practice, the drilling is carried out completely blind, and this also shows in the results. Attempts have been made to develop techniques which make drill hole tubing redundant. However, techniques proposed hitherto have had such shortcomings that they have not been used in practice. They are generally based on internal fixtures, which considerably limits the available space in the drill hole.
DISCLOSURE OF THE INVENTION
The object of the invention is to provide a rock drilling machine of the abovementioned type, which can solve the abovementioned problem. A particular aim of the invention is to utilize the available drill hole area optimally. A further aim is to propose a simple, practical solution to the guidance problem, in other words to permit precision drilling in the bedrock, so that the result corresponds, with a high degree of precision, to the predetermined hole direction. However, the invention is not limited to producing straight holes alone, and instead the term "predetermined hole direction" entails the more general object of producing drill holes following a trajectory which is determined in advance and which may be curved.
These and other aims can be achieved with a rock drilling machine which is characterized by what is stated in the patent claims which follow. Further characteristics and aspects of the invention will emerge from the following description of a preferred embodiment.
BRIEF DESCRIPTION OF DRAWINGS
In the following description of a preferred embodiment, reference will be made to the accompanying drawings, in which
FIG. 1 is a perspective view of a unit which is referred to hereinbelow as a drive unit,
FIG. 2 is a perspective view of a unit referred to as an anchoring unit, and of a unit referred to as a feeding unit,
FIG. 3 is a partially schematic side view of the integrated drilling machine during drilling in a drill hole,
FIG. 4 shows, on a larger scale, a guide and drive shaft in a sectional view along IV--IV in FIG. 3,
FIG. 5 shows, on the same scale, a control block in a sectional view along V--V in FIG. 3,
FIG. 6 shows, on the same scale, the control block with securing devices in an inactive position, in a view along VI--VI in FIG. 3,
FIG. 7 shows the same view as FIG. 6, but with the securing devices in an active position,
FIG. 8 shows, on the same scale, a view along VIII--VIII in FIG. 3,
FIG. 9 shows, on the same scale, a feeding unit in a view along IX--IX in FIG. 3,
FIG. 10 is a side view of a so-called starter tube in the working position, and
FIG. 11 illustrates an alternative embodiment of the flushing system and of the attachment of the drill bit.
DESCRIPTION OF PREFERRED EMBODIMENT
The drilling machine 1 consists functionally of three main parts, namely a unit which is here referred to as the drive unit 1, a unit which is here referred to as the anchoring unit 2, and a unit 3, here referred to as the feeding unit, which is arranged between the anchoring unit 2 and the drive unit 1.
The drive unit 1 comprises, from the rear and towards the front, the following components: a direction indicator 4, a hydraulic motor 5 with input and output lines 6, 7 for hydraulic medium, a transmission box 8, a rear mounting plate 9, a tubular guide 10 which has, along the greater part of its length, three longitudinal splines 11 which are directed radially outwards, a front mounting plate 12 which has, on the rear side, three pairs of attachments 14 for hydraulic cylinders which are included in the feeding unit 3, a drill neck 15, a water l
REFERENCES:
patent: 4332420 (1982-06-01), Coski
patent: 4474253 (1984-10-01), Kleuters
Nilsson Lennart
Sterner Lars
Fasth Rolf
Neuder William P.
Nilsson Lennart
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