In
a
statement
Friday,
Nabors
said
longtime
chief
operating
officer
Anthony
Petrello,
57,
would
be
assuming
the
top
spot.
A
Securities
and
Exchange
Commission
filing
from
Nabors
said
it
expected
to
record
the
“contingent
liability”
in
its
fourth
quarter.
The
81-year
old
Isenberg
led
the
drilling
firm
for
24
years,
the
company
said.
"The
company
and
its
shareholders
are
indebted
to
Mr.
Isenberg
for
his
many
years
of
dedicated
service,"
lead
director
John
Yearwood
said
in
a
statement.
A
Nabors
spokesman
did
not
immediately
return
a
call
for
comment.
Isenberg
is
no
stranger
to…