SAMPLER FOR TESTER OF POOLS Russian patent published in 2001 - IPC

FIELD: tests of wells in oil and gas production industry. SUBSTANCE: sampler has case housing sample-taking chamber with seats. Seats are manufactured in the form of cylindrical steps of larger and smaller diameters. Case includes inlet and discharge valve rigidly coupled by rod. Valves come in the form of cylindrical steps of larger and smaller diameters. Valves interact with seats to form closed space of excessive pressure with downward movement. Relief valves are installed in bodies of inlet and discharge valves. Relief valves are fabricated in the form of steps of larger and smaller diameters with through axial holes. On side of larger diameter relief valves are held by springs and communicate hydraulically with sample-taking chamber through holes in rod. Holes in bodies of inlet and discharge valves communicate spaces in points of diameters of these valve and steps of diameters of relief valves. EFFECT: design of sampler makes it possible to ensure complete closure of valves of sampler. 3 dwg