System to inject steam and produce oil from the same wellbore through downhole valve switching. Final report [report]

1994 unpublished
Through direct contacts with many California Operators,the potential market for this technology and hardware was more closely defined.The largest market might be for re-entry into existing but shut-in wells,equipped with 7"OD cemented casings,for which a suitable configuration was designed.For field-testing any prototype Downhole equipment,however,Operators and Service Companies prefer to start with a new wel1,for better control of the well characteristics.In the relatively shallow reservoirs
more » ... hallow reservoirs where Steam injection is currently used with success,the additional drilling cost,in soft formations,is sufficiently small that this became the main design case. Substantial savings were obtained by reducing the number of Downhole valves from two to one and by replacing the twin hydraulically-controlled ball or flapper-type valves with a single sliding sleeve valve,operated by wireline.Laboratory tests conducted STE -1-32 Son Marino Drive San Rafael, CA 94901 (415) 456-8237
doi:10.2172/10190616 fatcat:5kmhqccgnfdf5obmhdqvbho224