SU1633075A1 - A drilling tool - Google Patents

Abstract

The invention relates to the field of mining, in particular to devices for drilling large diameter wells in rocks of various strengths, and mb; also used in construction and exploration. The purpose of the invention is to increase the reliability of the projectile when drilling. The drilling rig includes a hollow drilling compound (BS), with which the central hammer (PC) 3 is rigidly connected, the collector 5 with a peripheral impact block

Description

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The invention relates to mining, in particular to devices for drilling large diameter wells in rocks of different strengths, and can also be used in construction and geological exploration.,

The purpose of the invention is to improve the reliability of the projectile when drilling with

FIG. 1 shows a drill at the moment of drilling, general view; Fig 2 - the same when drilling a well; in fig. 3 is a section A-A in FIG. 2C

The drill string contains a drill stand 1, to which a central hammer 3 with a drill bit 4 is rigidly connected via adapter 2. A drill header 5 is mounted on the drill stand with rigidly connected adapters 6, on which peripheral hammers 7 with crowns 8 are screwed. the removable yoke 9 is centered, which is fixed by the yoke 10 on the collector 5, between the central drum 3 and the adapter 2 an extension 11 is installed with a central hole 12. The central hole 13 of the stage 1 is connected through a longitudinal hole 14 in the front The adapter 2 with the radial channels 15 of the latter. In the collector 5, an annular cavity 16 is formed, which through the opening 17 of the adapters 6 is connected to the internal cavity 18 of the strikers 7. On the outer surface of the adapter 2 are cams 19 and splines 20, and on the collector 5 - cams 21 and slots 22.

The drill is working as follows.

From the drilling machine, by becoming 1 drill rods, the projectile is transmitted through axial force and torque, as a result of which the collector 5 with the strikers 7 and the striker 3

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begin to rotate, and crown 4 rests on the rock. At the same time, through the holes 13,14,12 of stav1, adapter 2 and extension 11, compressed air is supplied to the chamber of the central drummer 3, which begins to strike the crown 4, and that, in turn, destroys the rock and begins to drill the advanced well. At this time, the strikers 7 do not work, since the channels 15 are blocked by the collector body 5. As the striker 3 goes deeper into the rock, crowns 8 contact the rock and rise along the slots 20 along with the collector 5 and the strikers 7 upwards. At the same time, the radial channels 15 are connected with the cavity 16 and the compressed air begins to gradually enter the working cavity of the strikers 7, the latter with increasing energy begin to work. At the initial moment, when the radial channels 15 are not fully opened, the strikers 7 work with a lower productivity than the hammer 3. So it moves along the well faster and the more the channels 15 open. At the end, when the channels 15 are fully open, the cams 19 of the adapter 2 enter the cams 21 of the collector 5 and the torque from the drilling machine to the projectile begin to be transmitted through them, unloading the slots 20. At this moment most of the energy carrier is fed through radial channels into the cavities 18 of the strikers 7, and into the impactor 3 less and it works with lower productivity, and the drilling speed of the strikers 7 is compared with the drilling speed of the striker 3. After finishing the drilling, becoming 1 rises, the strikers 7 with the collector 5 lower under their own weight, the radial channels 15 close and access of air through the strikers 7

is terminated. Upon further elevation, the crown 4 is lowered and the drummer 3 enters the blocking mode, i.e. air directly through the cavities of the striker 3 is fed to the bottom of the central advance well and is blown through the "Burov fines" generated during drilling, is captured from the bottom of the well by a stream of compressed air coming from the strikers 3 and 7 and is removed inside the well, and then transported in the usual way (by screw, sludge, etc.).

F

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The rim of the invention: Drilling rim, including a central firing pin rigidly connected to a hollow drilling rig, a collector with a firing pin block and a removable holder connected by plugs to a collector, characterized in that, in order to improve the reliability of the projectile during drilling, the collector is installed with the possibility of axial movement relative to the drill rod, in which channels are made to connect its cavity with the reservoir cavity in the extreme upper position of the latter.

FIG. 2

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Claims (1)

Claim A drill, including a central hammer, rigidly connected 5 to a hollow drill stand, a collector with a hammer block and a detachable clip connected by rods to the collector, characterized in that, in order to increase the reliability of the U projectile during drilling, the collector is mounted with the possibility of axial movement relative to The drill neck is transported in the usual way (with a screw, chipper, etc.). the stand in which the channels for connecting its cavity with the cavity are made, 5 collectors in the extreme upper position Shchig. 2