SU1467192A1 - Core drill for drilling large-diameter wells - Google Patents

Abstract

The invention relates to mining. The goal is to increase the reliability of the drill and reduce labor intensity during installation work. In the lower part of the cylindrical body of the drill, there is a shoe 3. In the landing holes of the shoe 3, there are bushings 4 with threaded sockets and clamps 8. In the threaded sockets of sleeves 4, there are located 6 with flats 12 on their bodies. An annular groove 5 is made on the outer side surface of each sleeve 4. In the shoe 3, holes 4 are made perpendicular to the axis of the sleeve 4 under clamps 8 and coaxially with the unraveling holes — grooves P, aligned with the flies 12. The clips B are shaped as fingers with a central conical part and placed in the holes 9 with the ability to mate with the grooves 5. On the bit 6, the sleeves 4 are screwed up to the failure, which are then fitted in a tight fit into the mounting holes of the shoe 3. The fixing of the bits 6 Zaboi’s actions are ensured by the closure of the bodies of bits 6 in panes with 11 flats 12. Fixing bits 6 in sec (L od “with 1C 1Z

Description

the vertical direction is carried out by clamps 8, When the groove: 5 with a hole 9 is combined, the clamp 8 is screwed in, Due to the conjugation of the conical surface

a clamp 8 with a groove 5 takes place under the bit end face 6 to the support part of the shoe 3, which ensures a secure fastening on the drill body.

3 or

one

FIELD OF THE INVENTION The invention relates to mining and devices for drilling large diameter wells with core extraction.

The purpose of the invention is to increase the reliability of the drill and reduce the labor intensity during installation.

Fig „1 shows a core drill, general VID1 on FIG 2 - node I in fig 3, section A-A in fig 2.

The core drill for drilling large-diameter wells consists of a cylindrical body 1, a shank 25 of the shoe 3 and sleeves 4 with threaded under-bit sockets and annular bores Zr of the bit 6 with cones 7 and clamps 8 in the form of fingers with a central conical part, B The BGSME 3 has holes 9 for clamps 8G Holes 9 are perpendicular to the mounting holes 10 under the sleeves 4 in the shoe 3, Coaxially the mounting holes m. 10 in the shoe 3 are grooves II, which include 1.2 bits BS

Core drill collected sledumtsim way

The bits 6 are screwed up to the failure of the sleeve 45, which are then fitted tightly into the mounting holes on the shoe 3, the orientation of the roller cones 7 and the fixation of the bits 6 from the turning reaction of the bottom are ensured by closing the bodies of the bits in the slots 1I bgschmak 3 with the flats 12, fixing the bits vertical direction is carried out

five

0

five

.fixers 8, having a conical surface in the central part. When the annular groove 5 is aligned with the hole 9, the retainer 8 is screwed in. Due to the mating of the conical surface of the retainer with the annular recess. 5 of the cylindrical sleeve 4, the end of the bit 6 is pressed against the supporting part of the shoe 3 and thus ensures its reliable fastening on the housing 1 of the core drill.

Claims (1)

Invention Formula A core drill for drilling in large-diameter wells, including a cylindrical body with a shoe at the bottom, sleeves with threaded sockets and clamps, located in the mounting holes of the shoe, and chisels installed in the threaded sockets of the sleeves and having flats on the housings. 4T6j in order to increase the reliability of the drill and reduce the labor intensity during installation, an annular groove is made on the outer surface of each sleeve, and in the shoe perpendicular to the axis of the sleeve there are holes for clamps and coaxial but with mounting holes, grooves, with the clamps made in the form of fingers with the central conical part and placed in the openings with the possibility of mating with annular protrusions 1 -1 and bushings 5 and the bits are fitted with matching bald heads of their bodies with grooves on the baimake. -2 1467192