SU1456553A1 - Lateral core-taking device - Google Patents

Abstract

FIELD OF THE INVENTION The invention relates to mining and is intended for sampling of rocks in a well survey. The goal is to increase the reliability of work. The coring collector contains a housing (K) 1, which is lowered on the pipes, a group of retractable processors in the form of annular dies 2 fixed in the recess K 1 on the axis x 4 with the possibility of rotation. Installed in K 1 with the ability to move under the action of pressure of the washing fluid and return spring 12, the mechanism for extending the dies 2 in the form of a wedge 10 connected to the drive piston 11. The axes 4 of the dies 2 are aligned with each other, parallel to the longitudinal axis and eccentric relative to it. The stamps 2 are fixed on the axis x 4 with shear pins 6. The ends of the axes 4 are connected to each other and limitedly moving Hbw in the plane of rotation by a connection in the form of sector-like projections. When the dies come into contact with high hardness rocks, in order to protect the core sampler from deformation, double protection is provided. The pins 6 are cut at the moment the dies 2 are removed from the grooves. 7 il. (L jv ate jv with

Description

FIELD OF THE INVENTION The invention relates to mining, to a means of sampling rocks in a well survey.

The purpose of the invention is to increase the reliability of work.

Figure 1 shows a lateral core sampler, a general view of figure 2 shows the axis of the sampler with a group of punches; Fig. 3 is a section A-A in Fig. 1 (in the position of descent into the well); in FIG. A, the same in the stamp insertion position; figure 5 is the same, in the position of the lifting core sampler figure 6 is a section bB in figure 2; figure 7 - section bb In figure 2.

The lateral core mill contains a housing 1, which is let down on pipes (not shown), in which a group of retractable samplers is installed in the form of annular dies 2 fixed in recesses 3 of the housing on axles 4 with the possibility of rotation. Axis 4 stamps are aligned with each other, parallel to the longitudinal axis and eccentric relative to the longitudinal axis. On one axis there can be several axle punches connected with each other, limitedly movable in the plane of rotation by a connection in the form of sector-like protrusions 5. Stamps 2 have bases that are attached to axis 4 and to the stamp with shear pins 6.

In the upper part of the housing 1, a nozzle 7 is installed with openings 8 for the outlet of the washing liquid and with an adapter 9 for connection to the column pipe.

V Inside the nozzle 7 there is a mechanism for extending the dies in the form of a wedge 10 connected to a drive piston 11 mounted for movement under the action of the pressure of the washing liquid and the return spring 12.

For squeezing out the fluid, the channels 13 are provided in the base of the dies 2. Axes 4 are fixed to the housing with brackets 14 and are held against the case of an ESP rotation by a spring corkscrew 15. In the lower part of the housing, a rock-breaking tip 17 is installed on the pipe 16 to facilitate the descent of the core sampler well. .

Side coring collector works as follows.

After establishing the fact that the rock-destroying tool has entered

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coal seam and intersections n: i; ici, 4 npi of the end of the carp O1fobo1 an formation of the reservoir, the core collector is delivered in the required sampling interval on the drill pipe in the required test interval. Accurate final measurement of the projectile and comparison with the depth of the well at the specified location. After the depth of the first punch has been bound by the drilling pump, a flushing fluid is supplied through the drill string. The increase in pressure in the system by 0.5-1 MPa indicates that the piston moved down and the wedge 10 extended from recesses 3 by 30 relative to the initial position of the first group of dies 2. Pasos is turned off and right rotation is reported. In the process of turning the core collector body 180 clockwise relative to the axis of the well, the first axis rotates 90 counterclockwise relative to its own axis and 270 relative to the axis of the body 1. Since the die axes are eccentric, in one cycle the first group of punches is removed from the body before the sprites ( The base and primary penetration into the well wall is maximally compacted (Fig. 6), is taken out of the wall and placed into the recesses of the housing 3 on the other side. During the sampling, the first axis 4 turns around axis 60, engages with the downstream and continues joint rotation along the arc 30. The second group of dies comes out of the housing grooves and the edges of the dies come into contact with the borehole wall. At the subsequent rotation of the body 180 times the sampling cycle repeats and so on. alterations of all groups of stamps ..

When the dies come into contact with high hardness rocks, in order to protect the core sampler from deformation, double protection is provided. The pins 6 are cut at the moment the dies are removed from the grooves.

After completing the voyage and filling the dies, the core sampler rises from the well. Samples and samples are removed from the stamps from bottom to top in order, placed in envelopes and sent to laboratory tests.

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Claims (1)

SUMMARY OF THE INVENTION A side core sampler comprising a housing to be lowered onto pipes, a group of retractable samplers in the form of ring dies mounted rotatably in the housing recess on the axes, and a die extension mechanism with a drive piston mounted in the housing so that it can be moved under washing pressure In order to increase the reliability of operation, the mechanism for extending the dies is made in the form of a wedge connected to the piston, 'while the axis of the dies are aligned with each other, parallel to the longitudinal axis and eccentric relative to the longitudinal axis, the dies are fixed on the axes with shear pins, the ends of the axes are limitedly connected to each other connection of blunts moving in the plane of rotation. in the form of sector-shaped high Fiz. J