Abstract: A method of determining a fluid level in a well space without substantial venting of gas to the atmosphere or injecting a gas at high pressure. Gas being produced by the well is used to create a pressure differential between two spaces. A wave is induced in the well space by causing the two spaces to come into gaseous communication for a selected time internal. Pressure changes are measured as the induced wave travels through the gas in the well space from the measurement system to a fluid surface and back to the measurement system to determine a round trip travel time of the wave. The fluid level is calculated from the round-trip travel time and a speed of the wave as one-half of the product of the wave speed and the round-trip time.

Abstract: A method of inferring gas production utilizing a conduit having an outlet controlled by a valve in communication with a space within a well through which a gas volume is being produced. A selected number of measurements are taken during a selected period of time, with each measurement including closing the outlet valve to allow gas pressure within the conduit to change, sampling the gas pressure within the conduit over a sampling time period, calculating a rate of pressure change from samples taken over the sampling time period, and calculating a rate of gas production in the conduit from the calculated rate of change of pressure, the gas volume, well characteristics and gas properties. The calculated rates of gas production for the selected number of measurements are summed to determine an inferred rate of gas production through the conduit during the selected period of time.

Abstract: Apparatus, methods and products for monitoring/controlling a reciprocating well producing hydrocarbons from a wellbore, which determine the surface card from a well operating characteristics, determine the downhole card, and display both at the same scale for position.

Abstract: Apparatus, methods and products for monitoring/controlling a reciprocating well producing hydrocarbons from a wellbore, which determine the surface card from a well operating characteristics, determine the downhole card, and display both at the same scale for position.