Minimum temperature correction method for locating and setting gas-lift valves
OwnerIvan J. Raggioinventor
Life of this patent
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Abstract
A method for locating gas-lift valves in properly spaced manner within a string of production tubing extending to a production zone within a well. During calculations for valve spacing and set pressures, the spacing and reopening pressures of the valves are corrected to the lowest temperature that is expected to be encountered at any valve while lifting from the next lower valve of the gas-lift valve and piping system. An average between the flowing temperature corresponding to the rate to be produced from the next deepest valve and the geothermal temperature gradient are employed to calculate the reopening pressure of any given valve.
Claims5
A method of spacing and pressure setting gas-lift valves of a gas-lift production system according to the production characteristics of liquid producing wells, said method comprising:
- establishing the spacing of the various gas-lift valves relative to the surface;
- establishing the reopening pressure settings of said gas-lift valves;
- and
- correcting the spacing and reopening pressures of said gas-lift valves to accommodate the lowest temperature that could be encountered at any one of the valves while lifting from a lower valve.
Dependencies are inferred from the claim text.