SU1081341A1 - Arrangement for connecting drilling crown with submersible percussive mechanism - Google Patents

Description

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The invention relates to a device for connecting a drill bit with a submersible impact mechanism and can be used for drilling wells with air hammers.

A device is known for connecting a drill bit with an immersion mechanism by means of rolling bodies placed between the shank of the bit and the box of the body of the impact mechanism and held from falling by the locking element l.

Closest to the invention is a device for connecting a drill bit with a submersible percussion mechanism, comprising rolling bodies located between the shank of the crown and an axle box of the mechanism, having longitudinal channels on the inner side, and a locking element that keeps the rolling bodies from falling out 2.

However, the known devices do not provide sufficient reliability of the connection of the crown with the percussion mechanism due to the fact that the support rings used as a fixing element are often destroyed, especially when the crown is stuck in the well.

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

This goal is achieved by the fact that a device for connecting a 1H drilling rig with a submersible percussion mechanism, comprising rolling bodies located between the crown shank and an axle box of the mechanism body, which has longitudinal channels on the inner side, and a fixing element that keeps rolling bodies from falling out, is provided with figured -. The tangential through channels in which the rolling bodies are placed, holding their fixing elements are made in the form of a finger with a side groove, and curved inserts in the grooves of the fixing elements are installed in the axial channels.

At the same time, figured liners are made with a side head, which is included. in the longitudinal channels made on the shank of the crown.

FIG. 1 shows the device, longitudinal distribution; in fig. 2, section A-A in FIG. one.

The shank 1 (Fig. 1) of the drill bit 2 is placed inside the box 3 of the housing 4 of the percussion mechanism and receives blows from its striker, 5, which reciprocates in the housing 4. Simultaneously through the drilling rig (not shown), housing 4 and the crown 2, rotation is reported.

The drill bit 2 is held in the box 3 by means of the rolling bodies 6 installed in the tangential through channels 7, made in the front part of the box 3. From falling out of the body 6, the speed of the pump is held in the form of a pin 8 with a finger with a side groove 9. The rotation of the drill bit 2 is transmitted from the axle box 3 by rolling bodies 6 and lateral heads of 10 figured inlays 11 installed in the longitudinal channels 12 and matching 9 side elements 8 to the sideways. This interaction of the fixing elements 8 and figured inlays 11 eliminates them rovorot around their axes, and is prevented from falling out of the tangential channels 7 fiksirukntsih elements 8. In the axial .napravlenii shaped inserts 11 are held a retaining ring 13 (FIG. 1).

The rolling bodies 6 and the heads 10 of the liners 11 are in contact respectively with alternating blind channels 14 and openings from the end of the shank 1 of the crown 2 with grooves 15. To pass the rolling bodies, the blind channels 14 and open grooves 15 are interconnected by transverse grooves 16.

The crown 2 in the bush 3 is installed as follows.

The open grooves 15 of the shank 1 of the crown 2 are installed opposite the bodies 6 of the axle box 3. When filing the crowns 2, the transverse grooves 16 are located opposite the bodies of the 6th shaft. Turning the crown 2, the rolling bodies 6 fall into the blind channels 14, and the grooves 15 are installed against the heads of 10 shaped liners 11. When further sending the crown 2 to the rolling body c, contact the front edge 17 (Fig. 1) of the channels 14, and the heads of 10 liners 11 Included in the grooves 15 of the shank 1 of the crown 2.

When the core 2 is jammed in the borehole (box 3.3 goes to the right), the rolling bodies 6 are in contact with the trailing edge 18 of the channels 14, transferring the entire load not to the snap ring 13, but directly to the box 3, since the locking elements 8 are located in the front-end tagged channels 7 bush 3.

The locking ring 13, which holds the inserts 11 in the channels 12, is not transferred, as the heads 10 by the insertion 11 come out of the grooves 15 of the tail 1.

As a result of applying the invention, the reliability of the connection is improved and the crown loss in the wells is eliminated.

Claims (2)

1. A DEVICE FOR CONNECTING A DRILL BIT WITH A SUBMERSIBLE IMPACT MECHANISM, containing rolling bodies located between the tail of the crown and the axle box of the fur mechanism having longitudinal channels on the inside, and a fixing element that keeps the rolling bodies from falling out, which differs in that in order to increase its reliability, it is equipped with figured inserts, tangential through channels are made in the axle box, in which rolling bodies are placed, the fixing elements holding them are made in the form of a finger with a side groove, and in figured deposits included in the grooves of the fixing elements are installed in the axle boxes of the axle boxes. 2. The device according to claim 1, characterized in that the curly inserts are made with a lateral head included in the longitudinal channels made on the shank of the crown.