Apparatus for injecting and withdrawing fluids from a well
Patent
·
OSTI ID:5824976
An apparatus is provided for alternately injecting fluids through a well into a stratum, such as an oil stratum, and producing fluids through the well. It consists of the following components: (1) An elongated tube attachable at its upper end section to a downhole tubing string below a pump thereon and open on the lower end; (2) valve means, such as a check valve or sleeve valve, in an intermediate section of the tube operable to allow ingress of fluids directly from outside of the tube when in one position and to prevent egress of fluids when in another position; and (3) a tail pipe on the lower end of the tube communicating with it for passing injected fluids to a lower level in the well. The apparatus is attached to the lower end of a tubing string containing a retractable pump. There is an expanded section of tubing above the pump into which the pump is drawn to allow injected fluid to pass around the pump and through the apparatus into the surrounding stratum. (7 claims)
- Assignee:
- Phillips Petroleum Co
- Patent Number(s):
- US 3396797
- OSTI ID:
- 5824976
- Country of Publication:
- United States
- Language:
- English
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