SU648722A1 - Device for measuring depth of well in course of drilling - Google Patents

Description

I

The invention relates to the oil industry, in particular to the technique of measuring the depth, in particular, the drill Shih.

A device is known that contains measuring and clamping rollers, between which there is a pulley rope, a gearbox and a selsyn sensor located on the Ijt terminal.

However, this device is characterized by insufficient measurement accuracy.

It is also known a device for measuring the depth of a borehole during a drilling process, comprising a winch speed sensor, a hook weight sensor, a logic block 0, a counter block 2J.

The disadvantage of this device is the error in measurement, and the installation of a sensitive driver body on the crane of the crane unit worsens the conditions of safety.

The purpose of the invention is to improve the accuracy of measuring the depth of the well.

by compensating for the error that occurs when changing the cable junctions.

This is achieved by the fact that it is equipped with a block of corruption that is connected between the keyhole and the counter block and contains a generator of arobic pulses, rope layer counters, code dialing blocks, a key switch, a 1pulse form controller, encoders, AND schemes and a reversible impulse counter. -

owls, the output of the logic block is connected to the counting Bxonj of the layer stack of the rope, the output of which is connected to the first inputs of the circuits through one of the code set blocks and the encoder

And, and the output of the fractional pulse generator through a key-trigger and sequentially connected second block of the code set and the encoder is connected to the second inputs of the AND circuits, whose outputs are successively through the OR circuit, key driver, reversible pulse counter and pulse shaper connected to the counter block input.

The drawing is a conceptual heme device.

The device for measuring the depth of a well while drilling has an atchik 1 winch revolutions, a sensor 2 on the hook, a small block 3, consisting of a device 4 for manually entering information, a distributor 5 pulses, a trigger for flashing reverse, chem 7, scheme 8, node 9 delay, decoder 1O zero, selector 1 maximum pulse duration, key 12, circuit 13, block 14 counters, consisting of a reversible counter 15 over the face, counting 16 depth of the bottom, block 17 of the offset, consisting of a reversible counter 18, generator 19 fractional pulses, p Neelie set 20 of code latch key 21, form1fovatel pulse 22 schemes

OR 23, encoder 24, schemes AND 25, encoder 26, counter 27 imiulses, code dialing panel 28, reversible counter 2 9 pulses and pulse generator 30.

The device works as follows.

During the drilling operation, the signals from the winch revolutions sensor 1 enter the logic block 3 through the device 4 for manually entering information on the distributor 5.

The pulses coming in and the trigger control trigger 6 are converted into signals by which the device’s counter is controlled.

The pulse counters pass through the circuit OR 7, the delay node 9 and arrive at the key 12 and the counting input 18 turns of the rope. Key 12 transmits pulses only if available. weights on the hook, and the counter 18 produces an unalterable count of the turns of the rope. Signals 18 are received from counter 18 via dialing code 20 to the encoder 24. The encoder 24 has an output chip depending on the number of the layer of turns of the rope. At the corresponding output of the encoder 24, a signal appears that arrives at the corresponding circuit AND 25. The wire is key 12, the counting pulses are fed to the form-rammer 22 pulses of the corrector 17. The leading edges of the formed pulses reset the counter 27 and, through the pulse shaper of the pulses, are counted by the counter 16, and the rear

the fronts connect the generator of fractional pulses 19 through the key-trigger 21 to the counting inputs of counters 27 and 29. The accumulation of fractional pulses of the generator 19 on these counters occurs up to a certain number 1-5 of the corresponding layer number of turns on the winch drum. At the moment when the number of pulses on the chip 27 will correspond to the number of the layer on the corresponding output of the encoder 26, the same signal also appears.

If the signals of the hygraphors 24 and 26 of the corresponding circuit AND 25 through coincide, the OR circuit 23 to the key driver 21 nocTjTiHT is the same as the resolution on the crossover. Key trigger 21-interrupts the supply of pulses from the generator 19 to the input of the counters 27 and 29

Summation of counting pulses by a counter. The depth of bottom 16 is only possible if there is a resolution that comes from the AND 13 circuit when the signals from the reverse control trigger 6 and the decoder 1O zero coincide. When finding the tool over the bottom of a match will occur on the diagram And 8 when moving the tool. In this case, counter 15 switches to subtraction. When the tool moves up, the control signal of the reverse control trigger 6 will switch the counter 15 to summation.

Claims (2)

1. US Patent No. 36435О4, cl. 73-1I1.5, 1.972. 2.Kulikovskiy L.F., Ushmaev V.N. Information and measuring systems for drilling control. M., Nedra, 1976, p. 52.