SU45575A1 - Device for automatic control of the feed rate of the drilling tool depending on the load of the drilling motor - Google Patents

Description

In electric driven drilling rigs using induction motors, it is widely known to automatically control the bit feed depending on the load of the drilling motor.

The invention relates to a device for such adjustment used in drilling rigs, in which induction motors, electrically connected, are used as the drilling motor and feed motor so that when the load of the drill motor increases or decreases, the feed motor speed increases. According to the invention, a single core-frequency collector-frequency converter driven by a drilling motor is used for supplying energy to the dual-feed motor serving from the stator (or rotor), and the same is used to supply energy to the feed motor on the rotor (or stator) side. one core collector frequency converter, driven by an auxiliary motor, equipped with jigs, adjustable (5)

its speed depending on the frequency of the current of the first of these converters; This achieves motor speed regulation (feed from both the rotor side and the stator side. In the proposed device, the regulator uses a dual induction motor fed from the stator side from the first of these converters, and from the rotor side - from one core frequency converter, driven by an auxiliary motor of adjustable speed. In addition, the device provides for the use of special contacts controlled by a relay and aschih for switching engines production chain constituting the device.

The drawing shows a diagram of the electrical connections of devices and machines, compiled ush, their proposed device.

On the shaft of an induction drilling motor A, a frequency converter 5 is rated, consisting of a core of a normal DC machine, in which three winding points of the core are spaced apart from each other by 120 electrical degrees; Measles are placed in a stator consisting of iron without winding. An adjustable resistance 28 is connected to the rotor circuit of the auxiliary asynchronous motor C, which can be shunted for a short time by contacts 18. A frequency converter E is connected to the motor shaft of the same design as B

An induction motor F serves to feed the bit. The stator of this motor is connected to the collector 5 of the frequency converter B, the rotor 8-with the collector 9 of the converter E frequency The adjustable resistance of the auxiliary asynchronous motor G is connected to the frequency converter H. The same frequency converter is connected to the shaft of this engine designs like B and E, but smaller in size.

The stator 13 of the regulating motor / is connected at point 6 to the collector 5 of the frequency converter B. The rotor 14 is connected to the collector 25 of the converter H frequency.

By contact 17, the rotor 14 of the engine l / can be disconnected from the collector 25 of the frequency converter H, and the contact 1o, connected at point 15, is closed for a short time.

AC points are supplied to points 1, 11, 24. The device provides a smooth bit feed depending on the load on the drilling motor. At the same time, a constant load, independent of the soil penetration, can be set on the drilling motor. The proposed device also ensures that the load on the drilling motor is constant regardless of the nature of the soil that accidentally falls during the penetration.

The action of the device, i.e., the change in feed rates depending on the load of the drilling engine occurs instantly.

In the case where the drilling motor does not take the load due to the bit sliding over the rock, timely delivery is stopped to prevent the borehole from being bent.

The device operates as follows. Drill depending on the depth

the controller sets the resistance 21 in the circuit of the rotor 20 of the engine G; A certain frequency is formed on the collector 25; since, due to the presence of the fan 26 and BKjr of the resistance 21, the engine rpm Q and, consequently, the converter H will have a definite value.

If the slip of the drilling motor A is small, then the frequency at the collector 5 of the frequency converter B is small, and the engine / starts to move and begins to increase the resistance 28 of the rotor 19 of the engine G.

Due to the presence of a fan on the shaft of this motor, its speed and frequency converter E will decrease, while the frequency of the converted current will increase.

Increasing the frequency on the rotor 8 of the engine F will result in an accelerated feed rate of 1U. This acceleration will continue until engine A is loaded and the frequency at collector 5 is made equal to the frequency at collector 25; then the engine I will stop, the device will come to equilibrium, and the flow will occur at a steady rate determined by the frequency difference at the collector 9 of the frequency converter E and at the collector 5 of the frequency converter 5.

If now, for any reason (transition to a different soil), the drilling motor A begins to overload, then, firstly, the feed rate will immediately decrease, as the frequency supplied to the stator 7 of the motor P will increase compared to the frequency supplied on the rotor 8 of the same engine (it means overloading will cause the engine, body / reversal) and, secondly, the engine J will start moving, which will begin to decrease, resistance 28, thereby reducing the frequency applied to the rotor 8 of the engine F, will cause a decrease in feed rate until the engine And A will not be unloaded to a predetermined value.

After that, the feed rate is set at the new stable value. At underloading of the drilling engine, as is clear, the reverse process will occur.

In case the chisel slides along the ground and the drilling motor does not drop

loads, in order to avoid unnecessary transmission and curvature of the well, it is provided, under the influence of a relay from the drilometer, to turn on the short-circuiting rotor 19 of the engine C contacts 18, to open the normally closed contacts 17 and to turn on the short-circuiting rotor 14 of the engine J contacts 16.

This will cause a sharp decrease in the frequency supplied to the rotor 8 of the F motor and, therefore, its reversal, and the reduction of the resistance 28 that the engine will produce / will prepare, when the relay drops out, the start of the feed from a low speed.

The subject matter of the invention.

Claims (3)

1. An apparatus for automatically controlling the feed rate of a drilling tool depending on the load of the drilling motor using induction motors as the drilling motor and the feed motor, electrically connected so that when the load of the drill motor increases or decreases, the feed motor speed increases, characterized in that in order to supply energy to the dual supply motor F which is used to supply from the stator (or rotor) side, A single core collector frequency converter B, which is rotated by a drilling motor A, and the same single core collector frequency converter E, driven by an auxiliary motor C, equipped with a common core collector E, is supplied to the engine F from the rotor (or, respectively, the stator). regulating its speed depending on the frequency of the converter B current by means of the device /, in order to regulate the speed of the motor F both from the side of the rotor and from the side of the stator. 2. The form of the device according to claim 1, characterized in that device I uses an inductive double-feed motor fed from the stator side of converter B, and from the rotor side from one core collector frequency converter H driven by motor C with adjustable by speed. 3. The form of the device according to claim 2, characterized in that contacts 17 and 16 are included in the rotor circuit of the engine I for deviating it from the converter H and shunting the rotor for a short time, and contacts 18 for rotor shunting on short for engine reversal / feed. to the author's certificate of EM. 45575 Sinelnikova