SU1500760A1 - Bottom soil sampler - Google Patents

Description

The invention relates to the technique of drilling subsea wells and relates to sampling in loose rocks from low-tonnage boats.

The purpose of the invention is to increase reliability.

FIG. 1 shows the sampler, a general view; in fig. 2 - the relative position of the parts of the sampler in the water under the action of buoyancy force on the float; in fig. 3 - sampler with a folded rod, a suspended state.

The bottom soil sampler consists of a core projectile 1 with a vibratory driver 2, which is connected to the side of the vessel with a winch cable 3, and a rod, made in the form of a set of sleeves 4 with

2

sampling in loose, rocks from lightweight floating craft. The purpose of the invention is to increase reliability. The sampler includes a core shell with a shock absorber, a float, a folding stabilizing bar. The bar consists of consecutive sleeves and movable latches inside them. The movement of the clips in the sleeves is limited by stops on the inner surface of the sleeves. The distance from the stop to the upper end of the sleeve is longer than the latch. Clamps are rigidly interconnected by a cable passing inside them. The lower end of the cable is attached to the shock absorber, and the upper end - to the float. 3 il.

the possibility of axial movement of the latches 5. The latches are rigidly interconnected by a cable 6, the lower end of which is attached to the rod of the shock absorber 7, and the upper end to the "float 8. The shock absorber rod 7 is spring-loaded 9 with respect to the shock absorber body 10. 1 spring 11 is located. The sleeves 4 have internal stops 12 located from the upper ends of the outer sleeves at a distance more than the length of the clips 5.

The sampler works as follows.

The sampler with the folded rod "(Fig. 3) is suspended on the winch cable 3 overboard and start

immersed in water. When lowering the probe 51) „„ 1500760

3, 1500760

four

The selector float 8 is afloat until the rod straightens and takes up a vertical position (Fig. 1). When this latch 5 are located in the lower position, and their 'ends are below the upper ends of the sleeves 4. The shock absorber 9 is in the free position, the spring 11 pushes the sleeve 4 down. During the further immersion of the float, an ejection force acts on it, which, pulling the cable 6, compresses the shock absorber 9 and moves the clips 5 up to their stop in the internal stops 15 of the bushings 4 (Fig. 2). In this position, the rod acquires the transverse rigidity necessary to perform the stabilizing function of the float 8. 20

The sampler in an upright position is placed on the ground, the vibratory pile driver 2 is turned on (an electric cable can be used instead of the cable 3 for energy supply) and start> 5

drilling. After the end of drilling, the sampler is pulled to the surface by the winch cable 3. At this point, the float, together with the sampler, begins to feed upward. 30 As soon as the float 8 is out of the water, the tension of the cable 6 weakens, the shock absorber 9 returns the latches 5 to the lower position (Fig. 1).

In this case, the upper ends of the retainers 5 are lower than the upper ends of the corresponding sleeves 4. The rod loses: stability and, compressing the spring 11, folds up, taking the shape shown in FIG. 3. In this position, the sampler perekantovyv through the board and remove the soil sample.

The use of the proposed sampler reduces the likelihood of jamming of the rod elements during their folding due to the mismatch of the bushings with clamps, their damage and breakage, which increases the reliability of the device as a whole and reduces the time required for tripping operations.

Claims (1)

Formula of inventions A bottom soil sampler comprising a core shell with an amor- ¹ gasifier, a ceiling, a rod consisting of successive sleeves and movable clamps inside them, and a cable is passed inside the clamps, the lower end of which is attached to the damper And in order to increase the reliability of the work, the sleeves are made with internal stops located at the distance from the upper end of the sleeve more than the length of the retainer placed in this sleeve, and the clamps are rigidly connected to each other by a cable m. 1500760 eight 8 ~~~ eleven Fm.1 (r _and d.2 Fi, g.Z.