SU690367A1 - Device for determining setting time of plugging muds - Google Patents

Description

This solution is made in the form of a toothed pair, one of which has its side connected to the core of the coil, and the mechanism of discharge and lifting of the Vika needle is equipped with a support piece with a stepped surface and a support for the protrusion of the needle of Vika.

The introduction of a mixer into the installation allows one to create conditions for testing the solution that are close to those existing during the cementing process.

The site for measuring the thickening of the solution allows the solution to be stirred within the time of its thickening.

The step surface of the cam of the mechanism of discharge and lifting of the Vic's needle provides for the withdrawal of the Vic's needle beyond the measurement unit of the degree of thickening of the radar tube at the time of determining the degree of solution agglutination and the output of the Vicat needle to the measuring height when determining the setting time of the cement slurry.

FIG. 1 shows the proposed installation, a general view; in fig. 2 - time cut AA 1 in FIG. 3 - cam in three projections.

The unit has an autoclave body G, in which the bolt is screwed.

2 through which the hollow shaft is passed

3, on the inner end of which a half coupling 4 is mounted, carrying gear 5, constituting a gear pair with internal gearing with gear wheel b, the outer cylindrical surface of which rotates freely relative to sleeve 7 in only one direction. The rotation of the gear wheel 6 relative to the sleeve 7 in the opposite direction is prevented by the latch 8, which interacts with the spring 9. To the sleeve 7 by means of the stoppers 10 is attached a cup 11 for the test solution, the edge 12 of which engages with the rings 13 of the half-coupling 14 led-de shaft 15. From the axial displacement, the sleeve 7 is held by a retaining ring 16, which closes onto the upper sleeve 17 attached to the aatvora 2. In the upper sleeve 17 a cam 18 is fixed, on the end surface 19 of which the projection 20 of the needle rests. Vick 21. Face Butt The surface 19 of the cam 18 has the following: upper 22, middle 23 / lower 24. The closure of the protrusion 20 on the upper platform 22 corresponds to the neutral position of the Vicat 21 needle, when the needle of the Brooks outside the measuring site of the degree of thickening of the solution, the protrusion of the protrusion 20 to the middle flat 23 corresponds to the extreme upper pa “io4eMy” position of the Vicat 21 needle, and the closing of the projection 20 onto the lower platform 24 corresponds to the extreme / lower position of the Vicat 21 needle.

A fork 25 is attached to the hollow roller 3, which is in engagement with the Vicat 21 needle. The half coupling 26 is connected to the coupling half 4 by means of a ribbon spring 27. The shaft 28 of the agitator 29 is fixed relative to the coupling half 26 with a pin 30. The flange 31 mounted on the shaft 28 limits the height sample to determine the time of setting of the test solution. The slider 32 is connected to the half coupling by means of a threaded joint, and the rotation of the slider 32 relative to the half coupling 4 is prevented by the profile, for example, square shape of their mating surfaces. The slider 32 is connected by a rod 33 to the core 34 of the coil 35. The needle of Vic 21 with the core 36 of the coil 37 is connected by a hollow rod 38. A needle valve (not shown) is connected to the fitting 39 to release the excess pressure. Hole 40 is intended to connect a pressure gauge (not shown) to control the pressure in the cavity of the autoclave. Thermogilya 41

5 serves to introduce a thermocouple into the cavity of the autoclave.

The installation works as follows.

The rotation of the shaft 15 in a clockwise direction through the floor of the pins 14, the fingers 13, the rib 12 is transferred to the glass 11 for the test solution through the stoppers 10 of the sleeve 7. The gear wheel 6 does not rotate because the latch

5 8 does not prevent this. The test cement slurry in the rotating beaker 11 is stirred by an agitator 29, which is rotated by an angle proportional to the amount of non-resistance exerted by the kneading solution, by which the half-coupling 26 is rotated and the ribbon spring 27 is twisted. the slider 32 is converted into a linear movement of the core 34 inside the coil 35, the signal of which is transmitted to a computer device, for example, a differential transformer recorder. In time

determining the solution thickening time, the Vicat 21 needle is in a neutral position.

When the thickening of the solution reaches a value corresponding to the limit of its pumpability, go to the definition of the beginning and end of the setting of the solution.

Before the beginning of the determination of the setting time of the mortar, the Vicat needle is in a neutral position, since the protrusion 20 closes with the pad 22 of the end surface 19 of the cam 18. By turning the roller 3 counterclockwise, the protrusion 20 is transferred to

5, the pad 23, which corresponds to the extreme upper working position of the Vicat 21 needle. A further rotation of the roller 3 leads the protrusion 20 out of an ea'cani with the pad 23 and the needle 21, carried away by the POWER of its own weight, moves downwards. If the beginning of the setting of the solution has not yet begun, the movement of the Vicat 21 needle is limited by the protrusion 20, which is in the lowest position of the needle. Vika 21 v. Enters into engagement with the platform 24 of the end surface 19. If, however, the beginning of the setting of the blade does not occur, the movement of the needle of Vika 21 is slowed down in some intermediate position. After each measurement of the solution state, the Vicat needle 21 is raised to the upper working position by rotating the roller 3 counterclockwise, preparing it for the next measurement. The movement of the Vicat needle 21 by the rod 38 is transmitted to the core 36 of the coil 37, the signal from which is fed to the recording device.

Since the gear 5 and the gear wheel b constitute a gear pair with internal gearing that the wheel is lagging behind each gear shaft

() - t,

where t is the engagement step,

Zj is the number of gear teeth 5, Zj is the number of teeth of wheel 6.

The gear wheel 6 rotates the sleeve 7 and the cup 11c with the test solution through the latch 8, thereby preparing a new place for the test solution for inserting the Vicat 21 needle.

Sequential determination of the thickening time and the setting time of the cement slurry makes it possible to increase the reliability of the obtained characteristics of the solution, since the setting time of the solution in this case

determined by taking into account the previous movement of the solution, and reducing the amount of laboratory equipment.

Determining the setting time of the Thrumping solution, taking into account the previous mixing, allows laboratory conditions for testing the solution to be closer to the actual ones in the well, which will improve the quality of separation of the formations and will reduce the cost of secondary cementing. - - ------

Claims (2)

1. V. Danyushevsky. Reference Guide to Cementing Materials, Nedra, Moscow, 1973, p. 218-222. 2. USSR author's certificate number 376693, cl. G 01 N 11/10, 1971.