Perforations washing tool
Patent
·
OSTI ID:6797465
A tool is described for washing perforations in a casing set in a well bore. It includes a cylindrical housing having an upper port, and a lower port. The housing is connected to the lower end of a string of tubing hung from the well bore. The housing has various packers and passages so that cleaning fluid circulated down the annulus between the tubing string and casing flows in through the first port and out the second port through perforations at the same level as the second port. The cleaning fluid returns through lower perforations in the casing carrying sand or other plugging material with it and is returned up the tubing string. (7 claims)
- Assignee:
- Amoco Production Co.
- Patent Number(s):
- US 3760878
- OSTI ID:
- 6797465
- Country of Publication:
- United States
- Language:
- English
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