Wells – Processes – Producing the well
Patent
1981-03-16
1983-07-12
Novosad, Stephen J.
Wells
Processes
Producing the well
166250, 166373, 417 54, 417109, E21B 4300, E21B 4312
Patent
active
043925324
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.
REFERENCES:
patent: 2250464 (1941-07-01), Boynton
patent: 3277838 (1966-10-01), Canalizo
patent: 3478584 (1969-11-01), Strubhar et al.
patent: 3646953 (1972-03-01), Elliot et al.
patent: 3782468 (1974-01-01), Kuwada
patent: 4211279 (1980-07-01), Isaack
patent: 4251191 (1981-02-01), Gass et al.
Avcoin "The Use of Gas Lift and Flow Valves in East Texas Field", The Oil Weekly, pp. 44-56, May 31, 1937.
CAMCO Catalog 1952-1953, pp. 1050-1067.
Matthews Guy E.
Novosad Stephen J.
Suchfield George A.
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