SU1330298A1 - Above-bit stabilizer - Google Patents

Abstract

The invention relates to the mining industry and makes it possible to increase the efficiency of additional grinding sludge. The stabilizer comprises a housing 1 with blades 2 for grinding the sludge and side channels 5 for transporting it. In the housing 1 above the blades 2, an annular groove with an upper projection (B) 6 is made. Its radius is equal to half the sum of the bit radius and drill rod 4. In the groove (L

Description

Ke installed rollers 8 that fit into a circle, the radius of which is equal to half the sum of the bit radius and 6. During the drilling process, the slurry together with the flushing fluid enters the groove cavity. At the same time fine slime passes

one

. The invention relates to the mining industry, in particular to means for calibrating the borehole walls and stabilizing a drill rod.

The aim of the invention is to increase the efficiency of additional grinding of sludge.

FIG. 1 shows a stabilizer, a general view; in fig. 2 shows section A-A in FIG. 1 (with the image of the borehole wall).

The stabilizer is a body 1 with longitudinally arranged blades 2 reinforced, for example, with a solid alloy 3. The upper connecting thread of the stabilizer is connected to the drill stands 4. Between the blades there are longitudinal channels 5 for the passage of washing liquid and sludge transport.

An annular groove is made on the body of the stabilizer of the blades.

with the formation of the upper protrusion 6, the radius of which is equal to half the sum of the radii of the bit RO and drill

becoming R .. (Fig. 2).

J

In the annular groove on the axis x 7 there are rollers 8 with a gap B relative to the walls of the well 9 (Fig. 2). The size of the gaps t is equal to half the difference between the radii of the bit Ra and the protrusion R.

The stabilizer is located directly above the rock cutting tool.

During drilling, the blade 2 calibrates the borehole walls and dampens transverse oscillations of the drill rod.

between R 6 and the walls of the well in the annulus. The coarse sludge is crushed by the rollers 8. The stabilizer protects the drill post 4 from the sluggish effect of coarse sludge and prevents friction vibrations. 2 sludge.

0

five

Drilling sludge formed by a microprocessor tool, such as a roller bit, together with the flow of flushing fluid rises through channels 5 and enters the cavity of the annular groove. At the same time, the small spam passes unhindered in the gap formed by the protrusion 6 and the borehole walls into the annulus, and the large sludge is suspended by the protrusion 6 and crushed by the rollers 8 into smaller fractions that can pass through the annulus.

The use of the proposed stabilizer makes it possible to stow a drilling rig from the wedging effect of large particles of sludge and prevent friction vibrations, which increases the stability of the roller bits.

Claims (1)

Formula invented and. A borehole stabilizer of a drill rod, comprising a body with blades providing grinding of sludge and side channels for transporting it, characterized in that, in order to increase the efficiency of additional grinding of sludge, an annular groove with an upper protrusion, the radius of which is equal to half-sum of the bit radius and drill rod, while in the 5th groove there are rollers, fit-. vayusyayusya in a circle whose radius is equal to the half-sum of the radius of the bit and the protrusion. 0 five 0 / f- / 9 Editor N.Gorvat Compiled by Y. Palashchenko Tehred V. Kadar Order 3551/34 Circulation 532 Subscription VNIIPI USSR State Committee for inventions and. Discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5 Production and psigraphic enterprise, Uzhgorod, st. Project, 4 FIG. 2 Proofreader I. Muska