American Oil and Gas Reporter - August 2015 - 47

By St├ęphane Menand, Jeffry K. Lehner,
Nigel Evans, Aaron Palmer
and Arthur Metcalfe
HOUSTON-High strength-to-weight aluminum alloy drill pipe is a
powerful torque and drag reduction tool for horizontal and deviated
wells. Aluminum drill pipe (ADP) enables strength-to-weight ratios
equivalent to 160 ksi yield-strength steels and typically is 30-50 percent
lighter than similarly sized steel drill pipe (SDP).
Penn Virginia Corp. tested ADP in complex and highly deviated well
profiles on a four-well pad in the Eagle Ford Shale-the first such
application of ADP in a horizontal shale play. A "mixed" drill string design
was used in three of the four extended-reach wells to drill the curve and
lateral sections with ADP, while the vertical sections were drilled with
standard SDP. The drill string for the other well consisted of only SDP.
All four wells were designed with 7,000-foot lateral sections and
utilized steerable mud motors. The wells were spaced 15 feet apart at
the surface, and the typical lateral separation was 400-600 feet. The
wells drilled with the ADP string had significantly improved rates of
penetration and reduced torque, compared with the well drilled with
the SDP-only string using the same bottom-hole assembly and bit.

AUGUST 2015 47



American Oil and Gas Reporter - August 2015

Table of Contents for the Digital Edition of American Oil and Gas Reporter - August 2015

Contents
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