SU1125363A1 - Drift angle of hole transducer - Google Patents

Abstract

AZIMUTA TURNER converter, containing an angle measurement unit associated with the measurement transfer unit, primary converter, power generator, characterized in that, in order to simplify its design and increase the accuracy of azimuth determination in squalms with high temperatures, the primary converter is complete in the form of two orthogonal bistable magnetic cores, each of which has power and measurement coils, the power generator outputs are connected respectively to the power and measurement coils, and Exit past connected to the measuring unit.

Description

1 The invention relates to the field of instrumentation technology and is intended to determine the azimuth of curved wells. A device for measuring a borehole azimuth is known, which contains a master plate, magnetic modulation fluxgate transducers, a phase detector, a frequency doubler, a modulator, a signal converting unit, a cable length meter, and a phase shifter associated with it lj. A ferrozond azimuth sensor is known that contains a tandem, magneto-modulation flux-gate transducers, a cable length sensor, a phase shifter, a reference voltage generator, two identical channels consisting of a generator with a band-pass filter, a selective amplifier, a phase detector, a frequency doubler, a modulator and supplied RC-chain connected between the outputs of modulators, two Schmitt triggers, serially connected by a phase-code converter and a counter, and the inputs of Schmitt triggers are connected according to It is connected with the generator outbursts and the midpoint of the RC chain, and the Pstta flip-flop outputs are connected to the inputs of the phase converter - code 2. A disadvantage of the known devices is the complexity of the conversion circuits, and the presence of analog circuits significantly reduces the thermal stability of the devices, which, under well conditions, leads to a decrease in the exact conversion with a change in temperature. The well azimuth transducer is also known, which contains the angle measurement unit associated with the measurement transmission unit, the primary transducer, and the power generator. The disadvantage of this device is the complexity of the conversion and the availability of analog circuits, which reduces thermal stability. The aim of the invention is to simplify the construction of the device and improve the accuracy of determining the azimuth in wells with high temperatures. This goal is achieved by the fact that a borehole azimuth converter containing an angle measurement unit associated with a measurement transfer unit 631, a primary converter, a power generator, the primary converter is made of two orthogonal bistable magnetic cores, each of which has coils of power and measurement The outputs of the power generator are connected respectively to the power and measurement cores, and the outputs of the latter are connected to the measuring unit. FIG. Functional oval well azimuth converter; Fig. 2 is a diagram for explaining the operation of the azimuth converter. The azimuth converter of FIG. t) contains a primary transducer, consisting of two orthogonal bistable magnetic cores 1 with power supply coils 2 and measurement 3, each of which are sized on each of them, generator 4 poddni primary converters, unit 5 of measurement and unit 6 of transferring or storing measurement results. The measurement unit consists of a time shaping scheme of inte | shaft, for example, on the basis of a flS trigger, the inputs of which are connected to the winding 3 of the measurement, and the output through the valve is connected to a double discharge counter, with the second input of the valve being pulsed from a stable clock generator. The importer: the pulse to the pulse from the 3-dimensional winding to the input of the R8 flip-flop sets its potential at its output, which allows the pulses from the clock generator to the input of the binary counter to pass through the valve. Thus, at the output of the RS-trigger, pulses are formed, the duration of which is proportional to the central sine of the angle of core rotation, and the output of the counter is a binary code, the function | sine of the angle of rotation of the core relative to the magnetic field of the Earth. The number of bits of the counter and the cleanliness of the clock generator are determined by obtaining the necessary angle measurement accuracy. Similarly, the circuit is made for the second core. At the outputs of the counters, a code is established.

31

proportional to the cosine of the angle of rotation of the core.

From the output of measurement unit 5, the obtained codes are fed to the input of transmission unit 6, the device of which is determined by the type of communication link and the layer itself. For example, when using an electric wireless communication channel, the input code modulates the carrier frequency and through the relay device enters the communication channel.

The device works as follows. V

G generator 4 power supply of the primary converter is supplied to o6t4OTKH 2 power supply voltage of a certain form, for example, linearly varying. Depending from the first to the primary converter. Of course, the magnetic field of Earth is the last (the hebraic folding with the magnetic field of the winding and the power supply of the total magnetic field determines the moment of discontinuity in the re-exploitation of the bistable magnet-hc all {1).

In Stab pga maN gpshy wire ss spont from nag and ohm of the core and the core of the core of the magweply tough alloy containing cobalt, iron and niobium. As a result, the speci | cal & {oh mechanical

This combination combines the power of the internal magnetic field and creates in it a steady state of magnetization, in which the magnetic field of the magnetic field passes parallel to the axis of the axis. If an external magnetic field is applied to the wire in the direction opposite to that of its own lamagnevosno253634

So, as a result of moving the domain boundaries, the process of changing the direction of the magnetization develops. The speed of movement ensures a short switching time in the range of 20–30 µs, and the peak signal power is large. The effect is known in the art as the Wigand effect, and the process of magnetization reversal is associated with

to unusual physical properties arose in O1 when creating the surface work hardening of the cyclic strain. with stretch. As a result. In the surface layer, a proper field is created, which has a relatively large coercive force of 16002400 A / m. The core has a low coercivity and its. can be magnetized by field intensity

O 800 A / m. Remagnetizing the heart.: The guilt of the wire occurs by moving the domain boundaries, but the field in the outer layer of the wire remains immutable. When the sheath and the core of a zevin are magnetized in the same direction, the wire as a whole is magnetized. When the directions of their magnetization are opposite, there is an unchanged 1pricient domain boundary, and the wire as a whole is in a softened state. In the process of switching, the magnetic system goes from a state of greater energy to a state of lesser.

The economic effect from the use of the proposed azimuth converter is expressed in simplifying the measurement unit and increasing thermal stability. The azimuth converter can be used in most of the areas of technology associated with the development of equipment, operating in harsh temperature conditions.

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Claims (1)

A WELL AZIMUT CONVERTER containing an angle measuring unit associated with a measurement transmission unit, a primary transducer, a power generator, which, in order to simplify its design and improve the accuracy of determining the azimuth in wells with high temperatures, the primary transducer is made in in the form of two orthogonal bistable magnetic cores, on each of which there are power and measurement coils, the outputs of the power generator are connected respectively to the power and measurement coils, and in § The outputs of the latter are connected to the measurement unit. IL S SI w Aw. 1