SU866164A1 - Deep-well pneumatic percussive mechanism for drilling wells - Google Patents

Description

(54) SUBMERSIBLE PNEUMATIC SHOCK MECHANISM FOR DRILLING WELLS

I

The invention relates to an air pressure drilling machine and relates to a submersible pneumatic percussion mechanism for drilling a well.

A pneumatic submersible percussion mechanism is known, in which a drummer is placed in a cylinder; Closest to the technical essence is the submersible pivmatic percussion mechanism for drilling wells, which contains a cylinder located in. there is a drummer dividing its cavity into chambers of working and idling and having a tail distribution part with a channel connected to. idle cam

Yes, a distributing cup interacting with the tail part of the hammer, mounted at the end of the cylinder, communicated by its cavity with the working stroke chamber and having a supply channel 23 in the side wall.

Known pneumatic percussion mechanisms have a sufficiently large active area of the projectile, both at work and at idle,

10 and for this reason increased power.

However, they are subject to rapid wear and require increased air flow due to the fact that in the working chambers of the cylinder the radialgale filled the exhaust ports, and the compressed air for cleaning the well from cuttings is made from the idling chamber through the central channel in the drill crown.

Claims (2)

The circuit of the invention is to increase the wear resistance and cost-effectiveness of the pneumatic percussion mechanism. This goal is achieved by the fact that the drummer has an exhaust channel connecting the cavity of the distribution glass with the atmosphere, and a protrusion is mounted on the back wall of the glass, which periodically closes the exhaust channel of the drummer. The drawing shows a general view of the submersible pneumatic percussion mechanism, a longitudinal section. The submersible percussion mechanism contains cylinder 1, in which drummer 2 is placed, section of the internal cavity of cylinder 1 to chamber 3 of the worker and chamber 4 of idling. The drummer 2 has a tail distribution part 5 with a channel 6 connected to an idling chamber 4 and going out to the side wall of this distribution part 5, and an annular groove 7. Through the drummer 2 and its tail part 5 passes the exhaust channel 8, the tail part 5 of the drummer 2 enters the distribution cup 9, the internal cavity 10 of which is connected by channel 11 with chamber 3 of the working stroke. On the rear wall of the distributor cup 9 is installed, a protrusion 12, periodically entering into the exhaust channel 8 of the striker 2. In the side wall of the cup 9 a channel 3 is formed connected to the compressed air supply. In the rear part of the cylinder 1 screw adapter 14, which is attached by becoming drill rods (not shown). A crown 15 is attached to the front of cylinder 1, which has a tubular valve 17 from the end in the central exhaust channel 16, periodically entering the exhaust channel 8 of the impactor 2. The submersible impact mechanism works as follows. Compressed air from the rods and adapter 14 enters channel 13 and channel 6 of drummer 2 combined with it into chamber 4 is idling. At this moment camera 3 is working through channel 11, cavity 10, channel B in drummer 2 and channel 16 in the drill bit 15 communicated with the atmosphere. The impactor 2 undergoes idling under pressure in the air, and the protrusion 12 enters channel B, interrupting the communication of chamber 3 with the atmosphere, and channel 6 is disconnected from channel 13, stopping the flow of air into the idle chamber 4. Upon further movement of the striker 2, the valve 17 leaves the channel 8, air is exhausted from the chamber 4 through the channel 16 of the drill bit 15 to the bottom of the well. At this moment, the groove 7 communicates through channel 13 a chamber 3 of a working stroke with a supply of compressed air. Drummer 2 is braked and moves to the working stroke. In the course of movement of the striker 2, the groove 7 leaves the zone of the channel 13, stopping the intake of air into the chamber J. With further movement of the striker 2, the exhaust valve 17 enters the channel 8, closing the exhaust air from the chamber 4. At this moment, the protrusion 12 leaves the channel 8. There is an exhaust from the chamber 3 to the bottom of the well. At the end of the working stroke, channel 6 is aligned with channel 13, air begins to flow into chamber 4. The drummer strikes crown 15. Then the cycle repeats. The invention The submersible pneumatic shock mechanism for drilling wells, comprising a cylinder, a hammer located therein, dividing its cavity into working and idling chambers and having a tail distribution part with a channel connected to the idling chamber, interacting with the tail part of the impactor. a cup installed in the cylinder face, communicated by its cavity with the working stroke chamber and having a supply channel in the side wall, characterized in that in order to increase its wear ykosti and economy in the impactor configured vthlopnoy channel connecting yu1tsy cavity dispensing cup to atmosphere, and at the rear nozzle lip is mounted, which serves for closing the exhaust passage perioda1cheskogo impactor. Sources of information taken into account in the examination 1. Esin N.N. Submersible pneumatic percussion machines for drilling. Siberian Branch of Novosibirsk, Science, 1976, p.44. 2. Esin N.N. Submersible pneumatic percussion machines for drilling. Siberian Branch. Novosibirsk Science, 1976, p.43.