SU1180496A1 - Sampler of subsoil water - Google Patents

Abstract

SAMPLE GRU TOV'GH VOD water sampler containing a housing mounted on the Pipe Column with a sampling chamber connected to the inlet holes in the housing, on the outer surface of which a chisel and auger are distinguished, distinguishing one: in order to ensure the interval testing of the well, the pipe string is provided with an -inner tube coaxially, and rigidly fixed. noting relative to the pipe string, and an air tube fixed in the upper part of the pipe string, and the air tube is tightly connected to the source of compressed gas located on the surface, and through the inner tube - with a sampling chamber. (I 00 o 4 CO O5

Description

The invention relates to hydrogeological surveys and can be used, for example, in the study of the chemical composition of groundwater.

The purpose of the invention is to provide interval testing of the well.

The drawing shows a groundwater sampler, a general view.

The bottom of the drill string 1 is made up of screws, inside of which the inner tube 2 is missed. The perforated end of this tube enters the sampling chamber 3 located in the housing of the lower part of the drill string. The bottom of the sampling chamber is closed by a shank of 4 bits, and in the walls of its lower part there are inlets 5. The sampling chamber is filled with filtering material. Shnekova column by means of a hollow rod 6 is connected with the working tongue 7 rotator 8 drilling machine. The working hexagon has a through hole with two glands 9 for connecting the inner tube 2 and the air tube 10, which is provided with a gland 11 for lowering the sensor 12 of the electrical level gauge. The individual links of the inner tube 2 are sealed by the coupling 13, and the screws by hexagonal connections with the shaped inserts 14 fixed by the pads 15 with the screws 16.

Groundwater sampler works as follows.

In the course of rotary drilling, air from the compressor is supplied through the inner tube 2 to the sampling chamber 3, where an overpressure is maintained preventing the flow of water and sludge into the chamber and to smearing the filter. When the water intake chamber reaches the required drilling depth, the air supply stops, the case of the sampling chamber is disconnected from the rod 6 and the upper link of tube 2, and a sample is taken from the inner tube with the glass entering the sample chamber. At low water inflows, the sampling chamber communicates with a vacuum pump.

After sampling, the device is collected in the reverse order, and air is fed into the air tube until the water is completely displaced from the sample chamber. To accelerate the displacement of water, the projectile is rotated without immersion.

0 Water displacement control is performed by an electrical level gauge 12 of which rises into the rod 6 during sampling. The same operations are performed when the new section of the pipe string is expanded. After complete displacement of water from the sampling

5, the drilling chamber continues until the next sampling interval. Connecting the screws with inserts 14 allows, if necessary, to apply left rotation to facilitate removal of the device from the ground.

Claims (1)

UNDERGROUND WATER SAMPLER comprising a housing fixed to the pipe string with a sampling chamber connected to inlet openings in the housing, on the outer surface of which a bit and auger are fixed, characterized in that, in order to provide for interval testing of the well, the pipe string is provided with an internal tube, coaxially and rigidly fixed relative to the pipe string, and an air pipe fixed to the upper part of the pipe string, the air pipe being hermetically connected to a source of compressed gas located on the surface, and through the inner tube - with a sampling chamber.