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Primary Examiner: Purser, Ernest R.
Assistant Examiner: Suchfield, George A.
Attorney: Hartman; Richard C., Sandford; Dean, Farrell; Daniel R.

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Title: Generation of electricity during the injection of a dense fluid into a subterranean formation

Abstract: Electricity is generated during the injection of a dense fluid through an injection well and into a subterranean formation having a connate fluid pressure less than the available downhole pressure of injection fluid in the injection well. A fluid engine/generator is positioned in the well to define upper and lower zones in the well; a level of dense fluid is established in the upper zone; and dense fluid is flowed from the upper zone through the fluid engine/generator and into the subterranean formation to thereby generate electricity, which is subsequently recovered. Control of the downhole fluid pressure is also achieved.

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Inventors: Chasteen, Anthony J. (Brawley, CA, US)

Application Number: 869603
Filing Date: 1978-01-16
Publication_date: 1979-01-02
Assignee: Union Oil Company of California (Brea, CA)
Primary Class(es): 166/268 60/641.2, 166/65.1, 166/305.1, 290/52
Other Classes:
US Patent Ref:

1247520	Nov, 1917	Fessenden	290/55.
2978634	Apr, 1961	Arps	175/50.
3140986	Jul, 1964	Hubbard	60/641.
3258069	Jun, 1966	Hottman	166/252.
3288648	Nov, 1966	Jones	166/248.
3298435	Jan, 1967	Schoenfeld et al.	166/268.
3342267	Sep, 1967	Cotter et al.	166/65.
3627048	Dec, 1971	Roeder	166/305.
3857244	Dec, 1974	Faucette	60/641.
3939356	Feb, 1976	Loane	290/52.
4050516	Sep, 1977	Canterbury	166/305.

Other Refs: 2401024

Jul, 1975	DE

Other References: Armstead, "Some Unusual Ways of Developing Power from a Geothermal Field," Proceedings: Second United Nations Symposium on the Development and Use of Geothermal Resources, May 1975, pp. 1897, 1903, 1904.
Chasteen, "Geothermal Steam Condensate Reinjection," Ibid, pp. 1335, 1336.
Scott, "Hydropower from Underground Pumped Storage," Energy Sources, vol. 2, No. 2, Sept. 1975, pp. 217-227.