Wells – Processes – Cleaning or unloading well
Reexamination Certificate
2004-05-05
2008-08-12
Neuder, William P (Department: 3672)
Wells
Processes
Cleaning or unloading well
C166S090100, C166S088400
Reexamination Certificate
active
07409995
ABSTRACT:
An apparatus for washing undesirable matter off of the exterior of tubular conduits forming a conduit string during trip out of the conduit string within a subterranean well. The tubular conduits may be drill or workover pipe, or the like. A cylindrical housing has first and second opposite ends. A removable elastomeric seal means is provided across each of the first and second ends. The seal means is selectively secured relative to the housing. Each seal means defines an open passageway therethrough and which is centrally positioned there across. The open passageway through each seal means is sized for introduction, of the tubular conduits into and out of the cylindrical housing and the seal means. A circumferentially extending lip area of each seal means faces toward the respective passageways for snug, wiping contact around the exterior of the tubular conduits during movements of the conduit string into and out of the cylindrical housing.
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Beirne, Maynard and Parsons L.L.P
Neuder William P
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