SU964120A2

SU964120A2 - Apparatus for remote measuring of angles in well

Info

Publication number: SU964120A2
Application number: SU802986673A
Authority: SU
Inventors: Олег Михайлович Мироненко
Priority date: 1980-10-01
Filing date: 1980-10-01
Publication date: 1982-10-07

Description

(5) УСТРОЙСТВО дл ДИСТАНЦИОННОГО ИЗМЕРЕНИЯ УГЛОВ в СКВАЖИНЕ(5) DEVICE FOR REMOTE MEASURING ANGLES IN THE WELL

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Изобретение относитс к геофи-. зическим методам разведки и может быть использовано дл определени азимутальной ориентации геофизических приборов, например сейсмоприемников , в нем агнитных скважинах.The invention relates to geophysics. methods of exploration and can be used to determine the azimuthal orientation of geophysical instruments, for example, seismic receivers, in it as well.

По основному авт. св. № 819319 известно устройство дл дистанционного измерени углов в скважине, в котором источник света размещен в светонепроницаемом экране с двум щелевыми отверсти ми, одно из которых направл ет луч света через фокусирующую линзу на фотодиод, установленный на вращающемс кронштейне, а другое - на корпус, где установлен второй фотодиод. Магнитна стрелка с прикрепленным к ней экраном с радиальной щелью расположена между источником света и фотодиодом вращающегос кронштейна и заключена в проз .рачную герметичную камеру с жидкостью 1 .According to the main author. St. No. 819319, a device for remotely measuring angles in a borehole is known, in which a light source is placed in an opaque screen with two slit holes, one of which directs a light beam through a focusing lens to a photodiode mounted on a rotating bracket, and the other to a housing, where A second photodiode is installed. A magnetic arrow with a screen with a radial slot attached to it is located between the light source and the photodiode of the rotating arm and is enclosed in a transparent sealed chamber with liquid 1.

При измерении углов в процессе спуско-под-ьемных операций система колеблетс , что снижает точность измерений 1 .When measuring angles in the process of tripping operations, the system oscillates, which reduces the accuracy of measurements 1.

Цель изобретени - повышение точности измерений за счет снижени вибраций.The purpose of the invention is to improve the measurement accuracy by reducing vibrations.

Указанна цель достигаетс тем, что устройство снабжено карданным This goal is achieved in that the device is equipped with a cardan

10 кольцом, а вращающийс кронштейн выполнен в виде сбалансированного маховика , установленного в корпусе и подвешенного в карданном кольце.10 a ring, and the rotating arm is made in the form of a balanced flywheel mounted in the housing and suspended in the cardan ring.

На чертеже представлена конструк5 ци устройства дл дистанционного измерени углов в скважине.The drawing shows the construction of a device for remotely measuring angles in a well.

На маховике 1 размещены осветитель , состо щий из источника 2 света , помещенного в двухщелевой экран On the flywheel 1 there is an illuminator consisting of a source of 2 light placed in a double-slotted screen.

Claims

20 with slits 3 and k, a focusing lens 5 and a photodiode 6, which are mounted against the slit 3 of the illuminator. The axis of the rotation of the flywheel 1 coincides with the axis of rotation 396 of the magnetic needle 7 and the screen 8 with the radial slot 9. On the body 10 of the device there is a photodiode 11 which is placed behind the radial slot 12. The flywheel 1 is connected to the electric motor H. by means of shaft 13. the sliding contacts 16 electrically connect the moving and stationary parts of the device. Magnet arrow 7 with a screen 8 with a slit 9 enclosed in a transparent sealed chamber 17 filled with liquid, is located between the light source and the photodiode 6 and installed on the device body 10 using a rack 18. The device body 10 using a cardan ring 19 with bearings 20 suspended in the housing of the downhole probe. The device works as follows. The motor 1 spins the flywheel 1. The latter, in the process of rotation, possesses the properties of a gyroscope, retains vertical n (expansion, and the beam from sources of 2 light through the slit 3 on the illuminator screen, focused by a lens .5, hits the screen 8, which together with the magnetic arrow 7 is located in the chamber 17, at the moment of coincidence of the beam and the slit 9. The screen hits light on the photodiode 6, on which an electrical pulse appears. heterosexual included This makes it possible to distinguish the pulses generated by them.Electric pulses from the photodiodes are fed to an amplifier and then to a digital analyzer, where the time intervals between pulses are converted into digital, the angle information is used. due to the fact that it does not create an external magnetic field and can be placed directly with elements sensitive to a magnetic field. The piezoelectric motor is powered by a high frequency generator. The device, together with an electronic amplifier, a high-frequency generator and a voltage stabilizer, is housed in the casing of the downhole probe together with a physical device. The operation of the device is controlled remotely via cable. The proposed device, in comparison with the known, has a high degree of stabilization of the measuring system, which makes it insensitive to external mechanical influences. This improves the accuracy of measurements and permits measurements to be made continuously during the tripping of the downhole probe. The invention is a device for remote measurement of angles in a well by aut. St. No. 819319, characterized in that, in order to improve the measurement accuracy by reducing vibration, it is equipped with a cardan ring, and the rotating bracket is designed as a balanced flywheel mounted in the case and suspended in the cardan ring. Sources of information taken into account during the examination 1. USSR Author's Certificate No. 819319, cl. E 21 B ii7 / 022, 1979.