SU1456548A1 - Apparatus for measuring well crooking angle - Google Patents

Abstract

The invention relates to the exploration technique and allows to improve the accuracy and degree of borehole wells. The device includes cylindrical collets 1 and 2 connected by a flexible link. In collet 1, the housing (K) 5 is coaxially fixed with the light source (I) 14, the modulator 4 and the ring reflector 7, in the focus of which a photo receiver (AF) is placed 6. The modulator 4 is filled in the form of an opaque disk with uniformly spaced diaphragms 8. The collet 2 is connected to K 5 by a spherical hinge 13, the center of rotation of which coincides with the center of the spherical surface 11. Inside the K 5 there is a scanning unit in the form of an electric motor 15 whose shaft has an inclined mirror 16 and is coaxially aligned the course of the light beam. Mirrors 16 and 14 are optically coupled to the measuring raster in the form of alternating reflecting and light absorbing sectors on the surface 11. Opposite the light absorbing sector, a test optical system in the form of an FP 18 and a semi-transparent mirror 19 optically connected to I 14 is installed on K 5. electric motor. 15, beam 14 and having reflected from mirror 16 scans across surface 11. Reflecting sectors of surface 11 direct the beam through molar 4 to reflector 7 and OP 6, which prepares a sequence of pulses. The magnitude and direction of the curvature of the well is determined by the ratio of the number of pulses in each sequence. sequence and sequence, sequence with respect to the control pulse generated by the OP 18. 5 Il. W; 4 4) mt / f. one

Description

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The invention relates to the exploration technique and can be used to control the curvature of wells for various purposes.

The purpose of the invention is to increase the accuracy of measurements.

Figure 1 shows the device, a general view; Fig. 2 shows a section A-A in Fig. 1; Fig. 3 shows a section B-B in Fig. 1; Fig. 4 shows a view of the measuring raster and a scanning pattern of the light beam along its surface; FIG. 3 shows timing diagrams of signals at the output of photodetectors.

The device contains cylindrical collets 1 and 2 connected by a flexible link 3. In collet 1, the modulator 4 is rigidly fixed and coaxially the housing 5, and also the main photodetector 6 is placed, the photosensitive surface of which is located at the focus of the annular spherical reflector 7 mounted on the end surface of the collet 1 The reflector 7 through the diaphragms 8 of the modulator, D, evenly spaced around the circumference of the scanning radius of the light beam R, optically interacts with the measuring raster,

by a spherical surface 1 1, i.e. its focal length is optically matched to the surface of the mirror 16. On the case 5, there is also installed a control optical system in the form of an additional photodetector 18 and a translucent mirror 19, optically interconnected with each other.

An additional photodetector 18 and nof translucent mirror 19 are installed opposite one of the light-absorbing sectors 10. Semitransparent mirror 19 is optically coupled to the source 14 The device operates as follows.

The beam from the source 14 enters the inclined mirror 16, is reflected from it and, after passing through the transparent section 17 of the housing 5, hits the spherical surface 11 of the measuring raster. When the shaft of the electric motor 15 rotates, the inclined mirror 16 rotates with it, as a result of which the beam scans across the surface .11 describing a circle of radius R on it. In the absence of a curvature, collet 1 and 2 are located in the test section of the well

made in the form of alternating от 30 coaxially with each other and at the same time light-transmitting 9 and light-absorbing 10 sectors placed on the end spherical surface 11 of the collet 2, which is connected to the housing 5 by means of rigid connections 12 and the spherical hinge 13, the center of rotation of which falls with the center of the spherical surface 11, and the rigid connections 12 are made in the form of radial ribs arranged in such a way that their longitudinal dimension is that the focus of the spherical surface axes and the axes of symmetry of the light absorbing sectors 10 are in the same plane. A source 14 of collimated light is placed inside the housing 5 and the scanning unit is led towards the module T. 4

This beam is made in the form of an electric motor 15, the shaft of which is located coaxially and against the course of the light beam, and an inclined mirror 16 is mounted on the shaft, through which the source 14 is optically connected to the measuring raster. For this, the cylindrical section 17 of the housing 5, located between the electric motor 15 and the source 14, is made transparent. The inclined mirror 16 is located in such a way that the point of intersection of the surface of the mirror and the optical axis of the source 14 coincides with the photo

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parallel to the axis Kopnji ca 5. Rotating with the light beam sequentially passes through the diaphragms 8. This forms M sequences of light pulses, where M is the number of repressive sectors 9.,. and in each sequence the NJ light is on. impulses, and N depends on the length of the arc, on which the beam is reflected from the spherical surface 11 In the absence of curvature, the M sequences will be equal to each other and the main photodetector 6, to which the light pulses will

On a spherical surface, the howling ray describes a circle whose center coincides with the center O of the measuring raster (FIG. 4, the LSDEVB circle). As a consequence, the light beam is reflected towards the modulator. 4 when scanning it over the surfaces of the reflecting sectors 9 on arcs of equal length, i.e. AB SD EB. Due to

11 coincides with the point of reflection of the light beam on the surface of the inclined mirror 16, then the beam reflected from the spherical surface 11

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parallel to the axis Kopnji ca 5. A rotating light beam passes successively through the diaphragms 8. This forms M sequences of light pulses, where M is the number of reflecting sectors 9.,. and in each sequence there is an NJ light. pulses, and N depends only on the length of the arc on which the beam reflects from the spherical surface 11. In the absence of a curvature, the M sequences will be equal to each other and the main photodetector 6, on which the light pulses fall after reflection from the ring spherical reflector 7, produces M sequences of electrical signals that are equal to each other, i.e. N N N5 (Fig.5A).

If the well site is bent in the test area, the collet 2 rotates on the spherical hinge 13 relative to the collet 1. This, since the center of the spherical surface 11 coincides with the center of rotation of the hinge 1-3, the light beam scans along the measuring raster around the circumference radius R, which is 15 and with coaxial position of the collets 1 and 2, but with an offset of 1 (figure 4) relative to the center of the raster. Moreover, the values of direction 1 depend only on the magnitude and

The radiation source of the light source, the drift of the photodetectors, unstable rotation of the electric motor of the scanning unit, have no effect on them, which, besides increasing the accuracy, improves the reliability of the device.

Claims (1)

Invention Formula A device for measuring the curvature of a well, containing cylinder collets connected by a flexible tube to a Zyuu in one of which a housing is coaxially attached to a light source with an annular reflector, in the focus of which is placed the main photodetector tiwi and rsubstituted isnovnOI direction of curvature. Due to the PO-20 and the second collet is connected the raster gate the light beam passes the reflecting sectors 9 along arcs of different length, i.e. in the general case A B C D E B, that during the passage with body spherical hinge, characterized in that in order to not measure accuracy, it is equipped with a scanning unit, measuring   ..pp, measuring beam through modulator 4 will result in a raster, modulator and control H4L7. and t / l ts v g tl-lggch..r-gd .. This implies that each of the M pulse sequences contains a different number of light pulses. E as a result, the main photodetector 6 generates M sequences of electrical signals with different numbers of signals, i.e. N; g4 NJ (Fig.56). Once per revolution, the light beam hits the translucent mirror 19 of the control optical system, and from it to an additional photodetector 18, which produces an electrical signal (Fig. 5b) for assigning each pulse sequence to a specific reflecting sector 9, which is necessary to determine the direction of curvature with respect to the position of the mirror 19. The magnitude and direction of the curvature-optical system, while the scanner unit is placed inside the building and is made in the form of an electric motor whose shaft is located coaxially to the course 30 of the light beam and has an inclined zekal by which the light source is optically coupled to a measuring raster, made in the form of alternating reflecting and light-absorbing sectors located on the end spherical surface of the tooth connected with the body by a spherical hinge, the center of rotation of which coincides with the center of the spherical 40 surfaces, focal length co. optically matched with the slope of the inclined mirror, and the modulator is made in the form of an opaque disk, which has uniformly neither wells are uniquely determined by the circumference of the diaphragm WITH such KOHrTnvTCTiMM vfTTi -iur rT.r.-i With this design of the device, the ratio of the number of signals in each sequence and the sequence of sequence following relative to the reference signal. At the same time, the resolution and accuracy of the devices depend only on the size of the diaphragms 8 and the distance between them, and such factors as stability are rigidly connected to the housing and the collet, and the control optical system is made in the form of a translucent mirror and an additional photodetector, gg on the case opposite a light-absorbing sector, whereby a translucent mirror is optically coupled to a light source and an additional photodetector. The radiation source of the light source, the drift of the photodetectors, the instability of the rotation of the electric motor of the scanning unit, have no effect on them, which, besides increasing the accuracy, improves the reliability of the device. Invention Formula A device for measuring the curvature of a well, containing cylindrical collets connected by a flexible link in one of which is coaxially attached to a housing with a light source and an annular reflector, in focus of which is placed the main photodetector, tiwi and rsubstituted isnovnOI and the second collet is connected and the second collet is connected with body A spherical hinge, characterized in that, in order to improve measurement accuracy, it is equipped with a scanning unit, measuring  ..pp, measuring raster, modulator and control optical system, while the scanner unit is placed inside the case and is made in the form of an electric motor, the shaft of which is located coaxially to the course 0 light beam and has an inclined mirror through which the light source is optically coupled to a measuring raster, made in the form of alternating reflecting and light-absorbing sectors located on the spherical face of the collet associated with the body by a spherical hinge, the center of rotation of which coincides with the center of the spherical 0 surfaces, focal length the second is optically matched with the surface of the inclined mirror, and the modulator is made in the form of an opaque disk that has aperture uniformly spaced around the circumference - and rigidly connected to the housing and the collet, and the control optical system is made in the form of a translucent mirror and an additional photodetector, g mounted on the housing opposite a light-absorbing sector, wherein the semi-transparent mirror is optically coupled to a light source and an additional photodetector. FIG. Yu and d ft, "I ppp pppp FIG. Phage. mm ft ,