312 IAC 29-20-6 - Surface casing
Authority: IC 14-10-2-4; IC 14-37-3
Affected: IC 14-37
Sec. 6.
(a) The owner
or operator shall set surface casing according to the requirements of this
section unless an alternative well construction method is authorized under
section 11 of this rule. The surface casing shall be cemented in place by
circulating cement behind the casing from the setting depth to the
surface.
(b) The owner or operator
shall provide notice in accordance with the notice requirements set forth at
312 IAC 29-33-8(a)(1)
through
312 IAC 29-33-8(a)(4)
to an oil and gas inspector at least
twenty-four (24) hours before setting the surface casing.
(c) The cement shall be allowed to set in
place for at least four (4) hours and until the cement has developed a
compressive strength of at least five hundred (500) pounds per square inch
before resuming drilling.
(d)
Except as provided in subsection (e) or (f), surface casing shall be set in or
through an impervious formation that is:
(1)
at least fifty (50) feet below the base of the lowermost underground source of
drinking water; or
(2) at a depth
less than fifty (50) feet below the base of the lowermost underground source of
drinking water provided the next casing string to be set in the well is
circulated with cement to a level at least twenty-five (25) feet inside the
cemented surface casing.
(e) Any well drilled to a total depth of
eight hundred (800) feet or less below the ground surface may be completed
without surface casing provided the production casing is cemented to the
surface.
(f) A production well
completed in either the Trenton formation or the Black River formation in the
shallow Trenton limestone reservoir region, may be completed with a surface
casing string set in or through an impervious formation at least fifty (50)
feet below the top of the Maquoketa Group and cemented to the surface. This
string of casing is commonly referred to as the "water string".
Notes
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