Boring or penetrating the earth – With above-ground means for handling drilling fluid or cutting – With tool shaft having plural passages for drilling fluid
Patent
1997-05-01
1998-10-20
Schoeppel, Roger J.
Boring or penetrating the earth
With above-ground means for handling drilling fluid or cutting
With tool shaft having plural passages for drilling fluid
175415, 175418, 175320, E21B 17042
Patent
active
058232745
DESCRIPTION:
BRIEF SUMMARY
The present invention relates to a drill rod for a hydraulic drilling apparatus, at the drilling end of which there is a drilling device, that includes at least drilling means and hammering means as well as preferably flushing means, to drill a hole by means of the drilling means, preferably assisted by flushing medium led to the flushing means from the flushing system of the drilling apparatus and made functional by a transmission arrangement situated at the driving end of the drilling apparatus, by a feeding motion along the longitudinal axis of the drilling device and by a rotational motion around the longitudinal axis as well as by a to-and-from or a like hammering motion carried out by hydraulic fluid led to the hammering means from the hydraulic system of the drilling apparatus. The drilling device has jointing means for fastening of a drill rod preferably in a removable way to increase the drilling depth of the drilling apparatus. The drill rod consists of a casing structure equipped with corresponding jointing means and at least partly inside of which there has been arranged a flow arrangement for leading of hydraulic fluid and/or flushing medium and a coupling arrangement for connecting of the flow arrangement of the drill rod with a corresponding flow arrangement in the drilling device and/or in another drill rod and/or at the driving end of the drilling apparatus. The drill rod is arranged at least partly dismountable to enable its maintenance, whereby the casing structure includes an end part, that is attached to a middle part of the casing structure, preferably at both ends of the same by means of quick lock principle, such as by a thread joint or accordingly, in connection with which there exists at least a part of the jointing means, the coupling means and/or the flow arrangement.
Arrangements in which the hammering means operated by compressed air, are placed advantageously at the drilling head of a down-the-hole drill, have already been known for a long time and they have also been widely used in mineral industry. In this case an advantage of the hammering means placed in the hole is, that the strokes of the same are aimed directly to the drill bit, whereby it is possible to decrease energy loss and unnecessary wearing of components belonging to the arrangement to lower level than in solutions, in which the hammering means are placed in the rear end of the drill rods. In connection with pneumatic drilling machines compressed air is usually used to finish drilling waste, also. However, it is not beneficial to use the drilling machine with compressed air, because a very high power of the compressor unit is thus needed. In addition to that, the efficiency of a pneumatic system is clearly lower than the same of a hydraulic system.
Drill rods being used traditionally are usually uniform fixed entireties, that include in addition to the jointing means or threadings placed at the ends of the same pipes inlaid at the sides of the same or conduits or ducts arranged integrated or with separated pipes inside the same to lead said hydraulic fluid and generally flushing medium as well. When a conventional threading has been used as the jointing arrangement between the drill rods certain constructive problems are caused concerning the leading of hydraulic fluid and flushing medium from one part to another. Furthermore the prior art solutions with a one-ended thread will tend to untighten during use such that the hammer risks being dropped in the hole. Slowness of installation procedures is caused as well, because the drill rods must be "screwed" several rounds in relation of each other.
On the other hand dismountable drill rods for example for maintenance purposes are known earlier for example from EP-application 0 571 346 and U.S. Pat. No. 4,836,305. A drill rod according to the above EP-application has a middle part, inside of which there are flow ducts. At the ends of the same there are male and female end parts fastened for example by means of a thread joint. Drill rods mounted this way may be insta
REFERENCES:
patent: 4274663 (1981-06-01), Becker et al.
patent: 4337563 (1982-07-01), Becker et al.
patent: 4836305 (1989-06-01), Curlett
Sjoholm Harri
Wisakanto Risto
Oy Winrock Technology, Ltd.
Schoeppel Roger J.
LandOfFree
Drill rod does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Drill rod, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Drill rod will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-234663