DEVICE FOR TAKING SAMPLES OF LIQUID FROM WELL Russian patent published in 2006 - IPC E21B49/08 G01N1/10 

FIELD: hydro-geological well research, namely, equipment for taking liquid samples from well levels of different depth.

SUBSTANCE: device includes cable suspension, rod with diaphragms made with possible axial movement relatively to rod, cylindrically shaped body. Body is made in form of cylinders mounted one above another, each one of which is equipped from below with channels having valves. From above body is equipped with low pressure chamber, by means of which it is connected to cable suspension. From below body is equipped with hollow tail with technological groove on external surface, and on outside it is provided with bushing having spring localizers and a pin below. Pin interacts with technological groove. Bushing is made with possible hermetic closure of body cylinder channels. Rod is mounted hermetically and rigidly in the body and is made hollow and is muffled from below. Diaphragms are made in form of circular pistons mounted below each cylinder of body. Sub-piston hollow of each cylinder through channel with valve is connected to internal well space, above-piston area is connected to low pressure chamber via through apertures of rod. Technological groove is made in form of longitudinal recesses gradually extended downwards, connected by profiled groove. During reciprocal movement of bushing relatively to body pin moves successively to longer and longer longitudinal recesses, while successively opening channels of cylinder in downward order one by one.

EFFECT: increased reliability and quality of separation of samples.

2 dwg