CHAMBER OF SAMPLER FOR TAKING, STORING AND TESTING SUBSURFACE SAMPLES Russian patent published in 1997 - IPC

FIELD: oil and gas producing industry; applicable in study of physical properties of formation fluids. SUBSTANCE: intake chamber of sampler includes calibrated cylinder, valve unit, separating piston and hydraulic resistor. Chamber valve unit is sealed directly on the cylinder working surface. Threaded support in form of bushing for provision of free access to the end face of separating piston of means of mechanical pressure is installed additionally before hydraulic resistor. Located additionally between valve unit and separating piston in the cylinder is ball member for mixing subsurface sample in testing. valve and piston are made with spherical sockets for ball accommodation. Separating piston has sealing device which regulates interference fit between sealing collar and working surface of cylinder by means of conical threaded holder. Groove on conical surface of threaded holder has flexible force member for maintaining the constant contact pressure Pk of sealing. EFFECT: extended functional properties of the chamber, preserved representative characteristics of subsurface sample in transportation and storage. 3 cl, 5 dwg