SU1657602A1 - Boring tool - Google Patents

Abstract

The invention relates to geological exploration and is intended for drilling wells with coring. The goal is to increase the reliability of work. For that, disks are mounted on the outer surface of the housing in its upper part on its horizontal axes. The armature has an outer tube, which is provided with steps on the inner surface to interact with the discs. The through holes of the housing have guide grooves. The snare also has a locking assembly made in the form of dies of elastic material. Each of the dies is made in the form of a part of a ring connected by an elastic element. The inner surface of the dies is tapered with the top of the cone facing downwards. The outer side surface of the dies is made with a bevel in the upper part. The reciprocal bevel dies are made boring bevels. The elastic element is made in the form of compression springs located in the guide grooves. The core receiver is hydraulically connected to the chamber. If it is necessary to lift the removable core receiver and supply the flushing fluid to the annulus, the efforts of a pair of springs and the pressure of the flushing fluid directed from the bottom up, the dies move along the transport port, take up the initial position and thus the removable core receiver is freed from the outer pipe and is twisted. the disk rises to the day surface 2 sludge (L

Description

The invention relates to geological exploration, in particular to devices for drilling wells with coring

The purpose of the invention is to increase the reliability of work.

Figure 1 shows the drill hole, a longitudinal section; figure 2 - section aa in figure 1.

The drill bit comprises an outer pipe 1 with a gentle ledge 2, below which a boring 3 with a bevel 4 is made. Inside the outer pipe 1 there is a removable core receiver formed by housing 5 with chamber 6, bearing assembly 7 and

core tube 8. Inside the housing 5 is placed a ball valve float 9, above the lower position of which a channel 10 is made for the passage of the washing liquid. In the upper part of the housing 5 of the removable core receiver, disks 11 are installed, and below channel 10 there are made through grooves 12 of variable section with guide grooves 13 where the same dies are installed in their shape 14 The latter are made of elastic material and are interconnected by springs 15 in the grooves 13. The inner surface of the 16 dice 14 fulfilled VI o o

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on the conical tapering downward, the outer side surface 17 is with the bevel 18 in the upper part. The chamber 6 is hydraulically connected to the internal cavity of the core-receiving pipe 8 through the central channel 19. In the lower part of the housing 5 of the removable core receiver, a side channel 20 is made to communicate the internal cavity of the core-receiving pipe 8 with the annular space.

The drilling rig operates as follows.

When the removable core receiver goes down the drill pipe string (not shown) and the discs 11 reach the gentle ledge 2 of the outer pipe 1, the removable core receiver stops and the dies 14 with the bevel 18 are opposite the bore 3 with the bevel 4. In this case, the ball stop float 9 takes the upper position, so how the pressure of the washing liquid coming from the inner cavity of the core receiving tube 8 through the central channel 19 is applied to its lower surface.

After the removable core is installed, the outer pipe 1, which is supplied under the drill string i rub wash / v O iM ball stop float 9, exerts pressure on the end surfaces 16, pushes the dies 14 into the bore 3, and the springs 15 placed in the grooves 13, at the same time they occupy an extended position. Thus, the removable core receiver is fixed inside the outer pipe 1.

During the drilling process, the flushing fluid through the channel 10 enters the annular space, which communicates through the side channel 20 with the inner cavity of the core receiver tube 8.

During drilling, the rotation of the outer pipe 1 is transferred to the housing 5, and the presence of the bearing unit 7 ensures the immobility of the core-receiving pipe 8. If it is necessary to lift the removable core receiver and supply the flushing fluid to the annulus with a pair of forces

the springs 15 and the pressure of the flushing fluid directed from the bottom up, the stepped locking float 9 is pushed to the upper position, the dies 14, moving through the recess 12, occupy the initial position, thereby removing the core receiver from the outer pipe 1 and on the rotating disks 11 rises on the day surface.

Claims (1)

Invention Formula Drill bit containing outer a pipe with an annular bore on the inner surface, a removable core receiver in the form of a housing with a chamber in the upper part connected with a bearing unit with a core-receiver tube, a ball stop float placed in the chamber and a fixing unit installed in the through-grooves of the lower part of the housing, in order to increase reliability of work, it is supplied with disks. mounted on horizontal axes on the outer surface of the housing in its upper part, the outer tube is made with decks on the inner surface for interactions with the disks, through grooves of the housing have guide grooves, the fixing unit is made in the form of dies of an elastic material, each of which is made in the form of a part of a ring connected by an elastic element, the inner surface of the dies is made conical with the apex of the cone facing downward, the outer side surface is with a bevel in the upper part, the bore has bevels, counter beams of the dies, the elastic element is made in the form of compression springs placed in the guide grooves, and the chamber is dravlicheski bonded to the core tube. 73 /five 1A-A Fig.Ј