Displaceable plug in a tool string filter

Details Displaceable plug in a tool string filter Displaceable plug in a tool string filter

2009-03-17

2011-10-04

Gay, Jennifer H (Department: 3676)

Boring or penetrating the earth

With well-type screen

C166S205000

Reexamination Certificate

active

08028768

ABSTRACT:
A filter for a drill string comprises a perforated receptacle having an upper end and a lower end. The upper end of the filter comprises a drilling mud intake, and the lower end of the filter comprises an opening. A displaceable plug is seated on the opening at the lower end.

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