SU1182158A1 - Arrangement for contactless communication bentween sensor on pendulum block and well-logging cable - Google Patents

Abstract

A DEVICE FOR CONTACTLESS COMMUNICATION OF A SENSOR ON A PENDULUM UNIT WITH A CARTABLE CABLE, comprising a housing inside which low-speed spiral current leads and a self-stowed satellite block with a sensor, about 100 hp and 30 m, with a self-installing satellite block with a sensor, about a tl and h, and a self-terminating satellite block with a sensor, about a tl and h, and a self-terminating satellite block with a sensor, about a tl and h, and a self-terminating satellite block with a sensor, about a tl and h with a casing, and a self-stacking satellite block with a sensor, about 100 oz. reliability of operation due to limited twisting of the current leads, it is equipped with two eccentric weights placed on the rod, one end of the KOTopioro is movably connected to the axis of the mating unit, and the other is fixed in the housing, it eccentric weights are rotatably mounted with respect to one another and to periodically turn pendulum, the block in the direction (D rotating body.

Description

1 The invention relates to elements of a device for investigating boreholes and can be used in devices for orienting sensors (preferably a zenith angle) installed in borehole shells of geophysical instruments and containing a satellite. The purpose of the invention is to increase the reliability of the device by limiting the twisting of the current lead to FIG. 1 shows a device for contactless connection of a sensor on a pendulum unit with a wireline as well as sections A-A, B-B and B-B; FIG. 2 shows an eccentric load of two projections; FIG. 3 shows a kinematic scheme of a link consisting of an emphasis and an eccentric load; FIG. 4 is a kinematic diagram of an eccentric load link; Figures 5 and 6 show the kinematic diagrams of a link made up of eccentric weights and eccentric loads of the barn block; Fig. 7 shows a kinematic diagram of a link made up of an eccentric load and an eccentric load of the pendulum unit. The device comprises a housing 1, a satellite unit 2 with a sensor 3, an eccentric weight 4, an emphasis 5,. axis 6, insulated terminals 7 on the axis, conductors 8 and a linking sensor with co-current spiral wires 9. In the instrument case 1 a support 10 core 11 axis 6 of the ejector unit, axis 12 eccentric weight 13 and eccentric load 14 with support 15 are mounted core 1 & Tank unit axes 6, stop 17 and rigid terminals 18 insulated from the housing. Low torque spiral actuators 9 provide connection of chassis 3 on the satellite unit with the logging cable 19, the conductors of which are attached to terminals 18. Eccentric weights 13 and 14 rotate on the bearings 20 mounted in them around the axis 1. The stops 5 and 17, as well as 21-24, mounted in eccentric weights, provide the necessary sequence of interaction of the eccentric weights of the pendulous unit, limit the possible rotation of the pendulous unit On the body of the device. FIG. Figure 2 shows an eccentric weight 13 indicating the parameters that are necessary for analyzing the operation of the mechanism, where -2 is the angular size of the stop. 23; R is the distance from the axis of rotation to the center of the stop; (distance from the axis of rotation to the center of mass; P is the weight force applied to the center C of the mass of the eccentric weight. The eccentric weight 14 is made similarly and has an angular size of the stop 21 equal to D, to the center of mass where the weight force is applied Pg, the distance from the axis to the stops are also equal to R. In Fig. 3 - 7, the following symbols are used: rotation angle of the pendulum unit; w; 2 angle of rotation of the load 14; oi -) is the angle of rotation of the load 13; rotation angle of the device body. (For the initial state, the position of the weights and the shell is taken, Fig. 1). PI is the weight of the eccentric load of the 14 mantle block; r 2 - eccentric load weight 14; РЗ - weight of eccentric load 13. In FIG. 3-7 distances from the centers of mass of the loads 13 and 14 and the load 4 of the pendulum unit to the axis of the device are taken to be identical in order to simplify the analysis of the operation of the mechanism. Consider the operation of the device with a horizontal arrangement of its body. When advancing along the well, the device body 1 can rotate around its axis O - 360. When the body 1 rotates from its initial position to the corner; 5 180 ° counterclockwise (fig. 3) stops 17 and 24 are in contact and then body 1 rotates with load 13. When oi 360 ° - - (: i, -) stops 22 and 23 touch, eccentric weights 13 and 14 rotate together (Fig. 4). At the same time, the midplane block 2 remains in the oriented position, while the Low-Moment Current Retractors are twisted at an angle oi. At (180) the angles reach critical values () of loads 13 and 14 rotate counterclockwise under the action of weight, load 13, irrespective of the rotation of housing 1. This occurs when -P sinot 5 P3 g P -P cosii to (n that igtyi rp O, hence the RE RE3 C09 -, since Pj ei p –j. During rotation of loads 13 and 14, when (FIG. 5) the stop 21 koi 360 stops the stop of the 5th echelon block and further the loads 13 and 14 rotate together with the earthenic block under the action the weight of the load 13, at the same time the pendulum unit rotates at an angle oi and leaves the orientation state (Fig. 6), the unwinding of the current leads begins. At the same time the loads 13 14 and 4 constitute the kinematic link (Fig. 6). The size of the load 13 must be chosen such that it ensures the rotation not only of the load 14, but also of the pendulum unit, which is carried out with, -PjSin Oij P, 5in Oi, + Pj-Sinoij. Assuming that the link remains rigidly connected for all values of the angles t3, it is possible to determine the angle Lgr at which the loads are in the equilibrium state P5-5in-2 - P, -5in-2 P, -car 4-P, .Р, sov4ugol and 2 p should lie in the third quarter, therefore, O. Case P, Pg P-, -j - / b will be eliminated, since this balance is maintained at all values. After turning the load 14 on the hook, it promotes the rotation of the tandem unit together with a load of 13, and upon reaching a critical angle a load of 14 itself rotates a pendulum block. The value of od 2 cr 2 is determined from the condition -Pi-5lfloi., "I" eii From here P, -sin- | Pr-P, ow 4 To 180, you need tgOC2lfp2 0 "From here p p cos-5, since P | -5in-j - 0. Since up to of .. - 2 ".-". Irf J -h 2 k the link is rotated by the action of the weight of the load 13, it is necessary that the critical angle be reached before the load 13 reaches an equilibrium state, t . at, 360, at this, o. .x.o / 3 ". 180 I 2, p with 180 In addition, the critical angle 2 2 must be reached before the link of loads 13, 14 and 4 comes to equilibrium. Hence, for (the normal operation of the mechanism it is necessary that. (O. Gr-180%, 2v: p2 P.Sin P with D P3 - P-P, p ,,. P, assembly If-P b p-p, 5; lu, toR, sov-y Rg-P, sov and additional condition imposed on the goods:, + Pr YPT After - RUZ 13 does not interact with the load 14 and 4. The load 14, the arrival in equilibrium (Fig.7 ), rotates the mating unit at an angle of about 180, and the pendulum unit under the action of load 4 comes in a state of equilibrium, which is 360. At the same time, the small current leads twisted at the moment, about 450, are unwound at an angle of 360 However, unwinding of the current leads occurs when the projectile moves along the borehole and takes 2-3 seconds, while measurements with the self-terminating rotor unit are performed when the projectile stops unwinding does not affect the measurement results. With further rotation of the housing 1 in the same direction at an angle of 360, the process is repeated. Device is similar

works by rotating the body clockwise. The angles /, and / 3 are limited to ii -n 13- 360 which is necessary so that the stop 21 of the load 14 does not touch the stop 5 of the pendulum unit until it reaches the technical pressure until the loads 13 and 14 reach the critical angle and begin rotation under the weight of the load 13. If this condition is observed, the emitter block is in the state of orientation all the time, except for the unwinding of it by the loads 13 and 14.

The position of the stops 17 and 24; 22 and 23; 5 and 21 may be different, i.e. The stops mutually in contact with the rotation of the body can occupy different positions relative to the axis of the projectile, while remaining separated from each other by 180 relative to the axis in the initial position of the body. Swapping the stops does not change the principle of operation of the device. If weights 4, 14 and 13 are used with differences in the distance from the axis of the device to the centers of mass, in all the ratios given, it is necessary to intelligently ti g the distance from the axis to the center of mass, while the ratios do not change. When the axis of the housing 1 deviates from the horizontal, the forces driving the pendulum unit and eccentric weights in a state of equilibrium decrease in proportion to the cosine of the angle of inclination from the horizontal, and when deviated by 86–88 the force leading to the state of equilibrium is 0, 04-0.06 on the force acting in the horizontal position of the projectile body. For normal operation of the device, it is necessary to choose the weights 4, 13 and 14 and the angles 3 to choose so that the forces bringing the weights into balance can overcome the frictional forces in the bearings of the loads and set the companion unit into the orientation state. With a strictly vertical position of the body, the weights and the pendulous unit are disoriented; however, the pendulous unit sensor (meaning the plumb for measuring the zenith angle) assumes a vertical position regardless of the orientation of the pendulous unit. The installation of eccentric weights limits the twisting of low-current electrodes, it is possible to connect the sensor with a logging cable with low-current electrodes and ensure their contactless connection.

The proposed device provides a contactless connection of the sensor with a wire cable, which eliminates the influence on the measurement results of contact nonresistivity, for example, during oxidation or contamination of the collector surface, does not contain devices that press the brushes to the collector, and does not consume electricity to compress the brushes .

In addition, the device provides a contactless connection of the sensor on the pendulum unit with the logging cable through low torque current leads, the twist angle of which when the projectile moves along the borehole is limited to 4 kr, which ensures increased reliability of the device.

The device can be most effectively used in the manufacture of portable inclinometers for measuring parameters of production and exploration wells of small length, when the necessary conditions are reliability, simplicity, low weight and low energy consumption. j, y. X5 6 -N //// // //

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Claims (1)

DEVICE FOR NON-CONTACT SENSOR COMMUNICATION ON A PENDULUM UNIT WITH A LOGGING CABLE, comprising a housing, inside which on the central axis there are successively mounted low-current spiral down conductors and a self-locking pendulum block with a sensor, so that it can be increased so that reliability of operation due to the limitation of twisting of down conductors, it is equipped with two eccentric weights placed on a rod, one end of which is movably connected to the axis of the pendulum block, and the other is fixed in the housing, kstsentrichnye loads are rotatable relative to one another and to periodically § company A rotating the pendulum, the block in the rotational direction. SU., „1182158