Boring or penetrating the earth – With well-type screen
Reexamination Certificate
2011-07-19
2011-07-19
Dang, Hoang (Department: 3672)
Boring or penetrating the earth
With well-type screen
C166S227000, C166S231000, C210S448000, C210S452000
Reexamination Certificate
active
07980330
ABSTRACT:
A debris collector or strainer assembly for a well string tubular coupling wherein one embodiment discloses a conical coil with one end fixed to a hub, a beveled collar surrounding and supporting the hub and secured thereto with shear pins, the conical coil is deformable as necessary to capture irregular shaped objects between its coils, its loops may be closed, spaced apart, fixed or allowed to expand under pressure, and may be retrieved using an overshot fishing tool to engage a rod extending axially through the coil which may be attached at one or both ends of the coil.
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Dang Hoang
Parks & Associates P.C.
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