DEVICE FOR TAKING LIQUID SAMPLES FROM A WELL Russian patent published in 2007 - IPC E21B49/08 G01N1/10 

FIELD: hydro-geological well research, in particular, engineering of equipment for taking liquid samples from wells of various level depths.

SUBSTANCE: device includes rod with diaphragms in form of plugs, cylinder-shaped body with drain ports. Body is mounted on external side of upper diaphragm with possible longitudinal movement relatively to the rod. From above body is provided with hydraulic chamber with a wall. Hydraulic chamber from above is connected to pipes column. Piston, spring-loaded from below and hermetically enveloping the rod, is mounted inside hydraulic chamber. Circular recesses narrowing towards the top are made on external surface of rod above diaphragms, with distance between them equal to distance between diaphragms. Analogical circular recesses, narrowing towards bottom and equipped with stopper rings, are made on internal surface of wall and piston. Stopper rings are made with possible interaction with circular recesses of rod. From below the body is equipped with tail piece with longitudinal side channels. From below hydraulic chamber is equipped with technological apertures.

EFFECT: increased reliability and division quality of samples taken.

1 dwg