Boring or penetrating the earth – Processes
Reexamination Certificate
2007-11-20
2007-11-20
Tsay, Frank (Department: 3672)
Boring or penetrating the earth
Processes
C175S061000, C175S385000, C166S242700
Reexamination Certificate
active
10541638
ABSTRACT:
A wellstring assembly comprising a tubular first wellstring part with a passageway; a second wellstring part co-operating with the first wellstring part; and a releasable wellstring-interconnecting means for selectively interconnecting the first and second wellstring parts; an auxiliary tool for manipulating the second wellstring part, which auxiliary tool can pass along the passageway in the first wellstring part to the second wellstring part, comprising a tool-connecting means for selectively connecting the auxiliary tool to the second wellstring part, and an operating means for operating the wellstring-interconnecting means.
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Millar Ian Alexander
Runia Douwe Johannes
Wood Paul Neilson
Shell Oil Company
Tsay Frank
LandOfFree
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