SU1596099A1 - Azimuth sensor of inclinometer - Google Patents

Abstract

The invention relates to geophysical instruments and is intended to study the technical parameters of wells. The goal is to improve the accuracy of azimuth measurements. The inclinometer contains an eccentric frame 12, in which case 1 with bellows 3 is mounted on a semi-axle x 2. The case 1 contains an annular resistive element 10 and a contact ring 11. The magnetic arrow 4 mounted on the axis 6 rotatably contacts the latter through the contact plate 5 . A pressure disk 7, spring-loaded relative to the housing 1, is connected to the bellows membrane 3. The axis 6 is rigidly fixed to the housing 1. The disk 7 is mounted above the plate 5 so that it can move relative to the axis of the housing to contact the plate 5. Arrow 4 allows arresting arrows 4 in the axial direction. The position of the needle is fixed by means of a disk 7, which is lowered onto the plate 5 when arresting. 1 Il.

Description

The invention relates to geophysical instruments and is intended for the study of technical parameters of wells. The goal is to improve the accuracy of azimuth measurements. Inclinometer contains eccentric2

A frame 12 in which axle 2 ^is fitted with case 1 with a bellows 3. Case 1 contains an annular resistive element 10 n a contact ring 11. C, the latter is contacted by means of a contact, plate 5 magnetic arrow 4 mounted on axis 6 with the possibility of rotation. A pressure disk 7 is connected to the bellows membrane 3, which is spring-loaded relative to the housing 1. The axis 6 is rigidly fixed to the housing 1. The disk 7 is mounted above the plate. 5 with the ability to move relative to the axis of the housing for contact with the plate

5. Installing arrow 4 allows arresting when there is no movement of arrow 4 in the axial direction. The position of the arrow is fixed by means of a disk 7, which, when stopped, is lowered onto the plate 5. 1 Il.

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The invention relates to geophysical instruments for the study of technical parameters of wells, specifically to Inclinos: metry, and can be used in a normal geomagnetic field.

The purpose of the invention is to improve the accuracy of azimuth measurements.

The drawing shows the design of the sensor azimuth inclinometer.

The inclinometer azimuth sensor includes a housing 1 mounted on axles 2, a bellows 3 mounted on the housing 1, a magnetic needle 4 with a contact plate 5 mounted on an axis 6 rigidly mounted on the housing 1. A pressure disc 7 connected to the bellows membrane 8, spring-loaded relative to the housing 1 using a plate spring 9 and mounted on the contact plate 5, which is pressed by the pressure disk 7 to the ring resistive element 10 and the contact ring 11 installed in the housing 1. All the structural elements are installed in the eccentric en- frame 12 rotating about axis 13.

The sensor azimuth inclinometer works as follows.

Eccentric, the frame 12 and the housing 1 is installed on a plumb per prolyub the angle of inclination of the wells, and since their axes of rotation 2 and 13 are mutually perpendicular, the axis 6 is always directed vertically upwards.

In the initial state, the excess fluid pressure in the inclinometer is absent and the position of the elements of the azimuth sensor corresponds to that shown in the drawing, namely, under the action of a lamellar spring _; 9, the pressure disk 7 presses on the control plate 5 of the magnetic needle 4, pressing it with one shoulder to the ring resistive element 10 and the other to the contact ring 11.

For measurements in the cavity of the inclinometer, an excessive fluid pressure is created (about 2 atm). Under the action of this pressure, the membrane 8 of the bellows 3 is pressed into the cavity of the bellows 3, while the pressure disk 7, overcoming the resistance of the plate spring 9, rises and releases the contact plate 5. The magnetic arrow 4 with the contact plate 5 rotates on axis 6, ori ' 5. Oriented in the direction of the horizontal component of the magnetic field.

Then, the pressure is released, while the pressure disk 7 is lowered under the action of the leaf spring 9 and presses the contact plate 5 against the annular hinge ^{10 of the} active element 10 and the contact ring 11.

After that, the resistance of the open part of the ring resistive element 10, proportional to the azimuth, is measured.

15 The installation of a magnetic needle on an axis rigidly fixed on the body allows arresting in the absence of movements of the magnetic needle in the axial direction. The position of the magnetic needle is fixed using a pressure disk, which is lowered onto the contact plate of the magnetic needle when arresting, i.e. With such a constructive alignment, the sensor halfpenny reduces the deviations of the magnetic needle from the steady state corresponding to the actual azimuth angle, as a result, the accuracy of the azimuth measurement increases.

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Claims (1)

Claim 30 Inclinometer azimuth sensor, containing an eccentric frame, a housing mounted on it on the axes with a bellows placed on it, an annular resistive element installed in the housing and a contact ring in contact with them via a contact plate magnetic arrow mounted on an axis with the possibility of rotation, a pressure disk coupled with the membrane bellows and spring-loaded relative to the housing, characterized in that, in order to increase the measurement accuracy ^and the azimuth axis is rigidly attached to _(the housing pressing mouth disk Credited over the contact plate movable relative to the axis of the housing for contacting the contact plate.