Abstract: A simple device for collecting an oil sample from a well in a clean manner includes a generally cylindrical casing, an inlet tube connected at one end to a wellhead and at the other end to the casing near the top end for introducing an oil sample into the casing tangentially, so that heavy oil is forced outwardly against the interior of the casing and flows downwardly to the bottom thereof, a valved bottom inlet in the casing for discharging oil therefrom to a sample bottle, and a top outlet with a steel wood filter therein for discharging gas separating from the oil through the top wall of the casing.