Method and means for introducing treatment fluid into a subterranean formation
Patent
·
OSTI ID:5892597
This patent describes apparatus for introducing treatment fluid into a subterranean formation through a perforated casing. It comprises tubing positioned in the casing; means located above the perforations in the casing for sealing the annulus between the tubing and the casing; means for lifting fluid from the formation through the perforations and up through the tubing; the lifting means including tubing bypass means located above the sealing means, the bypass means comprising a conduit connected to the tubing by an inlet and an outlet to permit lifted formation fluid to flow through the bypass, the outlet being upwardly spaced from the inlet; and means for isolating the bypass means from the tubing to permit treatment fluid to be introduced to the formation down through the tubing and out the casing perforations. This patent also describes a method for introducing treatment fluid into a subterranean formation through a perforated casing. It comprises positioning a tubing string in the casing; sealing the annulus between the tubing and the casing at a location above the perforations in the casing; lifting fluid from the formation to flow through a tubing bypass located above the sealing means, the bypass being connected to the tubing by an inlet and an outlet spaced upwardly from the inlet; ceasing the lifting of fluid from the formation; isolating the bypass from the tubing; and introducing treatment fluid down through the tubing, out the casing perforations and into the formation. This patent also describes a reverse flow jet pump for lifting fluid from a subterranean formation and permitting the introduction of treatment fluid into the formation after ceasing to produce fluid from the formation. It includes a tubing section adapted to be aligned with a tubing string in a wellbore; a tubing bypass connected to the tubing section by an inlet and an outlet, the outlet being upwardly spaced from the inlet.
- Assignee:
- Marathon Oil Co., Findlay, OH (United States)
- Patent Number(s):
- A; US 5000264
- Application Number:
- PPN: US 7-485116
- OSTI ID:
- 5892597
- Country of Publication:
- United States
- Language:
- English
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