Lufkin Industries, LLC

Other

Shell Oil Comapny

Sam Gavin Gibbs

Kenneth Bernard Nolen

Doneil Macusi Dorado

Eric S Oestreich

Jeffrey J Dacunha

LeMoyne Boyer

Bernard Nolen

Bobby R Bramlett

Lemoyne Boyer

Doneil M Dorado

An instrumentation system for assessing operation of a reciprocating pump system which produces hydrocarbons from a non-vertical or a vertical wellbore. The instrumentation system periodically produces a downhole pump card as a function of a directly or indirectly measured surface card and a friction law function from a wave equation which describes the linear vibrations in a long slender rod. A control signal or command signal is generated based on characteristics of the downhole pump card for controlling the pumping system. It also generates a pump and well analysis report that is useful for a pump operation and determination of its condition.

Apparatus for analysis and control of a reciprocating pump system by determination of a pump card

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.

Systems and methods for measuring a fluid level within a well

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.

Systems and methods for inferring free gas production in oil and gas wells

A method for inferring production of a rod pumped well. Inferred production is estimated in a well manager which not only performs pump-off control with a down-hole pump card, but also estimates liquid (oil-water) and gas production using the subsurface pump as a meter. Methods are incorporated in the well manager for identifying and quantifying several conditions: pump leakage, unanchored tubing, free gas and oil shrinkage. Quantifying such conditions in the well manger enables accurate inferring of production thereby eliminating the need for traditional well tests.

Inferred production rates of a rod pumped well from surface and pump card information

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.

Methods, apparatus and products useful in the operation of a sucker rod pump during the production of hydrocarbons

A method for monitoring a rod pumped well to detect various problems, i.e., fluid pound, rod parts, pump problems, high fluid levels, imbalance of the pumping unit, rate of production and others. The method utilizes measurements made at the surface to calculate a downhole pump card. The method utilizes the downhole pump card to detect the various pump problems and control the pumping unit.

Monitoring and pump-off control with downhole pump cards

Instantaneous speeds of revolution for a beam pumping unit prime mover rotor, determined for all or a predetermined part of the pumping unit reciprocation cycle, are applied to compute one or more parameters of pumping unit performance, which are compared to predetermined values for such parameters to detect the existance of cause (such as pump-off, mechanical malfunction, electrical operating inefficiency or pumping unit imbalance) for correction of pumping unit operation, which is done if indicated by the comparison.

Method for monitoring an oil well pumping unit

A method for monitoring a rod pumped well and determining when the well has pumped off. The method uses a dynamometer to monitor the power input to the rod string and senses when the power input decreases to determine when the well pumps-off.

Growing community of inventors

Midland, TX, United States of America

Sam Gavin Gibbs