SU765688A1 - Device for withdrawing soil samples from pool bottom - Google Patents

Description

(54) DEVICE FOR THE SELECTION OF SAMPLES OF GROUND FROM THE BOTTOM OF WATER

one

The invention relates to sampling, and in particular, to devices for sampling soil from the bottom of a reservoir.

A device for sampling soil from the bottom of a reservoir is known, comprising a column pipe, a cutting tip and means for lifting the device to the surface.

In this device, the means for lifting it to the surface includes a winch mounted on board the ship, which is fixed to the core tube ti.

The disadvantage of the device is its low productivity and reliability in operation, due to the need to use multi-kilometer cables from the deep sampling of soil samples from large depths.

The closest to the invention. The technical solution is a device for sampling a primer from the bottom of a reservoir, containing a core pipe, a casing tip, and a positive buoyancy element.

Such a device, as a result of the presence in n & l of an element with positive buoyancy, rises to the surface after sampling a soil with

the bottom of the studied reservoir without the use of additional funds 2}.

The disadvantage of it is the low reliability in operation, in particular, in the study of viscous and oozy soils, due to the possible release of the core pipe at the bottom of the reservoir with such soils and loss of the device.

10. The purpose of the invention is to increase the reliability of the device.

This goal is achieved by the fact that it is equipped with a frame and a ycTafrts blended drum with a cable on it,

15 when this frame is connected with the casing tip by means of latches and., Brackets and mounted on the element with positive buoyancy, and the cable is rigidly connected to the core

20 pipe and mounted on a drum with calibrated rings.

The number of turns of the cable on the drum to the first calibrated ring is determined by the formulas;

25

, N /,

- drum diameter,

where d p

- weight of the device in water without a casing tip with a sampled soil,

Claims (2)

30 QH K - coefficients, onpei, elucidated according to the shape of the device and its hydraulic resistances. The drum is made in the form of two discs interconnected along the periphery by tubes. In addition, the batometer is equipped with a ring of soluble material installed between the frame and the casing lug, the column pipe is made with valves in the upper and lower parts, and the element with positive flotation is made in the form of a float. FIG. 1 is a schematic illustration of the device, a general view of FIG. 2, node A in FIG. 1 (the connection of the core pipe and casing tip with the frame, the cut). The device consists of an element with positive buoyancy - a float 1, a frame 2 fixed on it with a drum 3, wound on a drum 3 and reinforced with calibrated rings 4 of a cable 5, a core pipe 6 with an upper moth Elm 7 and a lower flap (not shown) valves rigidly connected to the cable 5 by means of a 5-bolt 8, and a casing tip 9 connected to the frame 2, in the lower part of which the supporting flange 10 is made, by means of brackets 11 fixed to the upper part 11 and latches 12 mounted on axles 13 on the supporting flange 10. In Azora 14 between the support flange 10 of the frame 2 and casing 9 is set tip ring 15 of soluble material. The drum 3 is mounted on a frame 2 nx x 16 and is made in the form of two disks 17 interconnected by perimetry by tubes 18. In the upper part of the float 1, the grip 19 is strengthened. The device works as follows. The launching of the device from the ship’s board makes it ready for operation. For this purpose, a ring 15 made of growing material, casing tip 9, which is fixed by snaps 12, which engage with brackets 11, is put on the core pipe 6. The cable 5 is attached to the drum 3 by fastening it on the tubes 18, from which the drum is made 3, calibrated rings 4, while the number of turns of the cable 5 on the drum 3 to the first calibrated ring 4 is determined according to the formula:), drum diameter — weight of the device in water without a casing tip with a sample of soil QH K — coefficients determined eat accordingly the shape of the device Twa and hydraulic resistances. The diameter of the wire of calibrated fins 4 determines kgg from the condition of its grounded break by the maximum force developed by the float 1 when ascending. The device is dropped from the vessel and it is immersed in the test howl. When lowering the device, water freely passes through the core pipe 6 due to the presence in the upper part of the butterfly valve 7; the ring 15 dissolves, releasing the gap 14 between the downhole tip 9 and the supporting flange 10 of the frame 2. When the device is inserted into the bottom of the reservoir, the soil enters the column pipe 6, due to the formation of the gap 14 between the supporting flange 10 and the casing tip 9, their relative moving and disengaging the latches 12 and the brackets 11. Thus, the casing nozzle 9 is disconnected from the device and the frame 2 begins to be raised with the drum 3 under the action of the float 1. At the same time, the cable 5 unwinds the drum 3 to the first The adjustment ring 4, upon reaching which the force generated by the float 1 is transmitted by means of the cable 5 and the eyebolt 8 of the core pipe 6, or it is pulled out of the ground or the gap of the calibrated ring 4. Similar forces are created when further unwinding the cable 5 s drum 3, as it reaches the next calibrated ring 9 and as a result, the column pipe 6 with the sampled soil of the bottom of the reservoir under investigation rises to the surface. Claim 1. A device for sampling soil from the bottom of a reservoir, containing a core pipe, a casing tip and a positive buoyancy element, characterized in that, in order to increase reliability in operation, it is provided with a frame and a drum with a cable mounted on it This frame is connected to the casing lug by means of latches and brackets and fixed on the element with positive buoyancy, and the cable is rigidly connected to the core pipe and fixed on the drum using calibrated rings. 2. A device according to claim 1, characterized in that the number of turns of the cable on the drum to the first calibrated ring is determined by the formula} n TC-DGiN / P / K,