American Oil and Gas Reporter - April 2016 - 82

With its rounded shoulder, the latest addition to Drilformance's
DF516T family has space for extra
cutters. The added redundancy
gives the bit the durability to drill
challenging Permian Basin laterals in a single run.

system and cutter layout."
To manage depth of cut, the bit uses
diamond-coated tungsten carbide inserts.
"More traditional tungsten carbide inserts
will wear out as the bit engages the formation, which means the depth of cut,
and therefore, tool-face control, will differ
throughout the run," Kitagawa explains.
Although the bit is new, with only

five runs logged as of mid-February, Kitagawa says its performance has been outstanding. "For example, in Martin County,
Tx., an operator used a DF516R2 to drill
a 1,018-foot curve in 23 hours," he relates.
"It is difficult to find a perfect offset, but
in that area, we typically see curves take
35-40 hours."
To eliminate or minimize trips in tough

ARTICLE

Permian laterals, Drilformance has expanded its DF516T family. "We are excited
about the new DF516T," Kitagawa comments. "In Reeves County, Tx., where it
has had the most runs, the bit has helped
an operator go from using three or four
bits to a single bit to complete the lateral."
In the first Reeves County run with
the new design, the operator drilled 6,388
feet in 88 hours for an average ROP of
73 ft/hr, Kitagawa says. "Not only was
the bit able to do the job of three or four
bits, it came out of the hole graded 1-1.
In other words, there was no significant
damage."
In the fastest Reeves County run, he
says the bit drilled 6,076 feet at an ROP
of 91 ft/hr and came out 0-1. "There was
no wear at all on the inner cone and nose
of the bit, and only a little wear on the
shoulder," he recalls.
Kitagawa says the bit has delivered
similar results in other Reeves County
wells in addition to wells in Martin and
Glasscock counties in West Texas. He
credits the bit's durability to premium
cutters that have exceptional impact resistance and a new shoulder design.
"The new DF516T departs from the
previous bits in the family in that it has a
dual-radius shoulder," he says. "The fuller,

Drilling
Technology

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w w w. a o g r. c o m
82 THE AMERICAN OIL & GAS REPORTER



American Oil and Gas Reporter - April 2016

Table of Contents for the Digital Edition of American Oil and Gas Reporter - April 2016

Contents
American Oil and Gas Reporter - April 2016 - Cover1
American Oil and Gas Reporter - April 2016 - Cover2
American Oil and Gas Reporter - April 2016 - 3
American Oil and Gas Reporter - April 2016 - Contents
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