SU408017A1 - DRILLING DRILL - Google Patents

Description

one

The invention relates to mining, in particular to drilling tools for drilling long wells in coal seams with high gas-dynamic activity.

Drilling tools for drilling wells in outburst coal seams are known, including a drill bit and a reamer, rigidly connected by an adapter enclosed in a casing and reamer-movable body.

The purpose of the invention is a non-threaded; enne sticking of the adapter when emitting an angle. This is achieved by the fact that the body is made in the form of a cylindrical helix with closed turns, one end of which is fixed axially on the crown side and axially movable on the other side.

The drawing shows the proposed drill screen, a general view.

It consists of a logger 1 and an expander 2, interconnected by a retractor 3, which is enclosed in a housing 4, made in the form of a cylindrical spiral. The body is fixed at the crown on the sleeve 5, which can rotate about the longitudinal axis of the tool and is fixed in the axial direction. From the side of the expander 2, the housing 4 is fixed on the sleeve 6, movable in the axial direction.

In normal operation, the spiral is buren

(body) 4 is in a compressed state

the drilling process is similar to conventional drilling.

the tool consisting of a zaburnik and an extender.

: When emitting an angle, the helix (body) acts as a barrier, preventing the penetration of the ejected angle to the adapter. The forward movement of the entire helix ceases. In the process further, the drills 1 moves forward, pulling the sleeve 5, which in turn stretches the coil. Through the lumens formed between the turns of the helix, the coal flows into the cavity between the housing 4 and the adapter 3, is picked up by the flow of the washing fluid and is released from the well. Due to the fact that the formation of lumens between the turns and the stretching of the helix is stretched in time,

Dosage and carbon intake of flushing fluid are made.

After all the excess coal in the ejection zone has been discharged, the spiral is returned to its original position due to the elastic forces, the normal drilling process is resumed.

The projectile dilator 2 serves to avoid jamming the helix when removing the projectile from the well, as well as to release the movable sleeve 6 in the event of its being clamped. The subject matter of the invention A drilling tool for drilling wells in outburst coal seams, including a drill bit and an expander, rigidly connected by an adapter enclosed in a relatively movable crown and extenders body, characterized in that, in order to prevent the adapter from sticking when emitting coal, a cylindrical spiral with closed turns, one end of which is fixed axially from the side of the crown, and the other end with the possibility of longitudinal movement.

B