American Oil and Gas Reporter - April 2015 - Cover2

HALF A MILLION FEET
IN THE SHALE PLAY
The AST is being used in an increasing number of applications:

STRINGERS

In less than two years, the patented Anti Stick-slip Tool
(AST) from Tomax has passed half a million feet in the US
Shale Play. The AST is used where the drilling is predicted
to be challenging, and this makes the milestone particularly
significant.
The AST is a mechanical regulator placed downhole that
simply saves the drilling system from being overloaded if the
drill-bit bites too deep. By absorbing the excessive forces
(torsional and/or axial), the AST also acts as an energy store that
automatically feeds its energy back to the drill-bit if loading
drops. The improved stability provided by the AST allows the
driller to put more power into the system from surface, in order
to increase the Rate of Penetration (ROP) - without increasing
the risk from vibrations. The expanded operational window also
permits use of more aggressive drill-bits that can yield further
ROP improvements.

Contact us:
Phone:
E-mail:

+1 713 557-7542
bill.murphy@tomax.no

ENLARGEMENT

ROUGH SEAS

PERFORMANCE INTERVENTION

Depth (ft)
6000

Agressive/Unlimited bit
8500

s
Conventional bit

10 000
11 500
13 000
14 500

5

10
Time (days)

15

20

Side-by-side progress curves from a recent well. A radical
improvement in ROP and reduced BHA runs deliver big
savings in hard carbonates.



American Oil and Gas Reporter - April 2015

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

Contents
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