DEVICE TO TAKE SAMPLES OF STRATAL FLUIDS FROM BOREHOLE Russian patent published in 2001 - IPC

FIELD: industrial and geophysical study of boreholes. SUBSTANCE: device to take samples of stratal fluids from borehole at specified depth has body, inlet chamber, protective housing with holes for passage of stratal fluids, ducts for hydraulic communication of chamber with borehole drilled above inlet chamber, upper valve with spring-loaded rod. Piston is installed in inlet chamber. Protective housing is linked to lower part of body. Upper valve is mounted for axial movement and shutting off ducts of hydraulic communication of inlet chamber with borehole. Device has bellows installed in lower protective housing and connected to lower part of body. Ducts for hydraulic communication of inlet chamber to borehole are made in body beneath inlet chamber. Lower valve with spring-loaded rod is mounted for axial movement and shutting off ducts of hydraulic communication of inlet chamber with borehole. Locking unit fixing positions of lower valve in its axial movement is also installed. EFFECT: simplified design and increased functional reliability of device. 5 cl, 1 dwg