Ulterra PDC bit sets record time, distance in Oklahoma “chat” well

Posted on 31 August 2012

Ulterra’s U613M PDC bit has been adapted to the harsh drilling conditions.

An Ulterra 6.125-in. U613M PDC bit combined with a TorkBuster performance-drilling tool has drilled a Mississippian formation lateral well further and faster than any offset drilled in Woods County, Okla. Drilling 3,370 ft of high-chert, Mississippian formation at 71.7 ft/hr, the run saved the operator US $207,000 compared to the average offset “chat” well.

The “chat” is the upper zone of the Mississippian formation and is composed of extreme levels of chert cemented with limestone and dolomite.  The chert exerts heavy damage to PDC bits, resulting in short runs and severe dulls.  The roller cone bits typically employed have less ROP potential, easily go undergage and have moving parts, which can fail and be left in the hole as junk.

The U613M has been adapted to the harsh drilling conditions through Ulterra’s innovative design process. This latest design better distributes loading over the entire cutting structure than previous designs, thus preventing cutter damaging spikes. The TorkBuster generates a rapid torsional impact to the drill bit, fracturing the cherty formation and allowing the PDC to effectively shear the formation at higher ROP and without bit damaging vibrations.

LightSpeed is a trademark of Ulterra.

Leave a Reply

*

FEATURED MICROSITES


Recent Drilling News

  • 17 April 2014

    Shell makes deepwater gas discovery offshore Malaysia

    Shell has made an exploration discovery offshore Malaysia in the Rosmari-1 well located 135 km offshore Malaysia in Block SK318. The well was drilled to a total depth of 2,123...

  • 16 April 2014

    Maersk Drilling takes delivery of ultra-deepwater drillship

    Maersk Drilling has taken the delivery of its second drillship, Maersk Valiant from the Samsung Heavy Industries (SHI) shipyard in Geoje-Si, South-Korea. Maersk Valiant has begun its voyage toward the...

  • 16 April 2014

    Ensco orders new jackups from Lamprell

    Ensco has ordered two high-specification jackups, ENSCO 140 and ENSCO 141, for delivery in mid-2016 from Lamprell’s shipyard in the United Arab Emirates. The rigs will also...

  • 16 April 2014

    MPD/UBD successfully drills sidetrack after 6 failed conventional drilling attempts

    In the Brookeland Field in East Texas, conventional drilling methods failed in six attempts to drill a “straightforward” horizontal wellbore. The original well had surface casing installed...

  • 16 April 2014

    Chevron’s DGD training program serves array of learners across generations

    Since 2008, more than 400 people – from operators, drilling contractors, service companies and regulators – have completed Chevron’s dual-gradient drilling (DGD) training...

  • Read more news