SU1694844A1 - Drilling device - Google Patents

Abstract

The invention relates to mining, in particular to the improvement of bottom-hole drill string assemblies in drilling, and allows to increase the productivity of the device by reducing the formation of glands and improving the removal of cuttings. To do this, a confused nozzle is installed in the central cavity of the bit housing 1, between the cone bits 1 in channels 5 diffuse nozzles are located, at the bottom of the pipe 2 along the perimeter in channels 7 installed upward diffuser nozzles 8. 10. The drilling fluid from the diffuser nozzles destroys the face, and from the confusing nozzles it prevents the packing of the cones. The drilling fluid from the nozzles 8 due to the ejection effect carries the sludge up and cleans the bottom. With the passage of this stream through the nozzles 10, its flow rate increases, which prevents the formation of galling on the calibrator 3. 5 Il. zz Yo

Description

FIELD OF THE INVENTION The invention relates to mining, in particular to the improvement of bottom hole drill string arrangements in drilling.

The purpose of the invention is to increase the productivity of the device by reducing omental formation and improving the removal of sludge.

FIG. 1 shows a drilling device; in fig. 2 is a section A-A in FIG. one; in fig. 3 shows the node I in FIG. one; in fig. 4 — node I in FIG. one; in fig. 5- node III in FIG. one.

The drilling device contains a three-piece chisel 1. connected to an improved drill pipe 2, which is connected to the top with a calibrator 3. A junction nozzle 4 is installed in the central cavity of the bit case 1. Diffuser nozzles 6 are installed between the bit bits 1. At the lower end of the flat drill pipe 2 around the perimeter

pipes in the side channels 7 are installed upward diffuser nozzles 8. At the upper end of the pipe 2 under the calibrator 3 in the channels 9 are installed upward confused nozzles 10.

The device works as follows.

After descending into the well and supplying flushing fluid while drilling into the internal cavity of a device rotating relative to the well (Fig. 1). part of the fluid expires through the side nozzles 6 and destroy the bottom hole. At the same time, during rotation, the entrance to the stagnation zone between the nozzles 6, the flow is perturbed by 1 with a frequency equal to the rotation frequency of the column. Another part of the washing liquid flows out of the nozzle 4 to the cones and into the inner part (between

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Powders and casing) bit cavity 1, which, together with pressure fluctuations in this zone, prevents oily formation on bit body 1. To these two effects is added the ejection effect created by the shaping flow from nozzles 8, which carries the drilled particles and transports them at high speed in the annular gap between the extended drill pipe and the borehole walls, to improve the bottom hole cleaning. After the passage of the flow past the nozzles 10, its ascent rate further increases due to the energy of the upward nozzles 10 and the increase in the total volume of the total flow, which, continuing to move upwards and the passage between the rotating blades of the calibrator 3, washes them and prevents sucking on the surface of the calibrator 3 .

Claims (1)

Claims of the invention A drilling device comprising a rock-destructive tool in the form of a tricycle bit attached to the drill pipe with a central flushing channel and side channels located upwards above the bit and fixed to the top of the calibrator drill pipe, which is designed to improve performance devices by reducing the formation of glands and improving the removal of sludge, it is equipped with diffuser and confused nozzles, with two dvufuzorny directed of the nozzle located between cutters in the bit channels formed in the other nozzle diffuser arranged in side channels and up to the direction of konfuzor- nozzle arranged at a calibrator formed in the drill pipe channels. Fig1 Aa 5 one Fma F FIG. five