SU30225A1 - Instrument for measuring borehole curvature - Google Patents

Description

To measure the curvature of boreholes, instruments are used with heavy | Hooke’s pivots on the ring hinge, dropped into the drill pipe and lowered on the rope, also use instruments equipped with a head mechanism to set the diaphragm in motion and in which a fixed clock mechanism is set to receive imprints at known time intervals on a gimbal suspension. In the proposed device, related to the indicated types, a crank drive is used to communicate the reciprocating movement of the pen through the determined time intervals, passing through the central opening in the template. In FIG. 1 shows the device in vertical section; FIG. 2 and 3 parts. The proposed device consists of a cylindrical body 7 with an internal mechanism (Fig. 1) and a tip P with a spring 7 / and a hammer 10 enclosed in it. The cylinder of the body 7 in its upper part ends with a lid 8 equipped with four flat springs 13, which serve for the axial direction of the device in the pipes, and also play the role of a brake when they fall in the pipes. For the same purposes, the same springs 14 are provided with a drummer 10. The internal mechanism of the device consists of a conical cargo attendant / suspended on metal rods x to the Hooke 2 ring hinge (Figures 1 and 2) mounted on the tips in sleeve 4; from a clock mechanism 3 fixed on the tips in the center of the Hook hinge, equipped with a connecting rod drive for communicating the translational movement to the pen 12 at certain predetermined intervals of time passing through the center of the tandem / for the vertical direction of the translational movement, regardless of the position of the instrument housing 7, and from the clock mechanism 5, installed in a horizontal position at the base of the case 7. The clock mechanism 5 imparts a rotational movement to the disk b with a diagram attached to it. Two springs 15 serve to remove the clockwork 5 with the diagram 6. The device is intended to measure the curvature of boreholes by dropping the device after the end of the drill into the drill pipe. The well curvature measurements are made during the recovery of the drill pipe from the well, periodically through certain depths, which makes it possible to judge the curvature of the well B and several points after the final extraction of the drill pipes from it. Pribbr can be lowered into the well also on the rope, h: го allows for one descent to make measurements of curvature at several depths.

The device operates as follows. The clock mechanism 3, after a predetermined period of time, approximately 20 minutes, makes one revolution, during which writing pen 12 approaches diagram 6, marks it and moves away from it. Chart b in an hour makes one complete revolution around the vertical axis. Thus for 2Va hours, i.e. in the time it takes to lift the drill pipe, the clockwork 3 will make seven marks on the diagram b, corresponding to different depths and

indicating the curvature of the well at these depths.

An instrument for measuring the curvature of boreholes, making measurements in one descent at several depths, discharged into the drill pipes or lowered on a rope, provided with a heavy plumb on a gimbal suspension and a diaphragm driven by a time mechanism, in which The known time intervals in the diagram are mounted on the aforementioned gimbals, a special clock mechanism, distinguished by the use of a crank drive, to communicate the reciprocating movement to the feather 72, passing through to guide through the hole in the center of the tambour 7.

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