Down hole oil field clean-out method
This patent describes a method of removing debris located in a production zone below a packer in an oil well or the like having an inner tubular member of a relatively small diameter of about 2 1/2 - 4 1/2 inches in diameter which extends longitudinally downward through a generally vertical outer tubular member longitudinally disposed in the well and terminates in a zone isolated from the annulus between the tubular members by the packer for producing the well through the interior of the inner tubular member, which debris is restricting flow from the zone to the interior of the inner tubular member. The method consists the steps of: (a) lowering an elongated body having a relatively small horizontal cross-section shaving an effective diameter of less than the relatively small diameter connected to the end of a tubing string downward through the inner tubular member, the effective diameters of the body and the tubing string being less than that of the inner tubular member, until the body is located below the packer, positioning an elongated blade disposed within the body by means of longitudinal movement of the tubing string so that at least the body is positioned down within the zone, (b) moving the blade radially outward toward the interior surface of the outer tubular member; (c) limiting the movement of the blade radially outward preventing the blade from cuttingly engaging the interior surface of the outer tubular member; and (d) rotating the tubing string, rotating and moving the blade within the zne, loosening the debris located in the zone within the interior of the outer tubular member.
- Assignee:
- C. Jerry Wattigny, New Iberia, LA
- Patent Number(s):
- US 4838354
- OSTI ID:
- 5497005
- Resource Relation:
- Patent File Date: 11 Dec 1986
- Country of Publication:
- United States
- Language:
- English
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