BHI Vertitrack Performance
16 November 2006
Good Morning Everyone,
We are going to try to use VertiTrak assembly in one of our vertical
well in the 12 1/4" hole section, mainly starting from the Chalk
formation. We were told by the supplier that VertiTrak requires a
with good stability to have good BHA response. If the bit is
and its toolface is turned while the Vertitrak is calculating and
correcting its direction in order to keep drilling vertical, the
outcome might be building/dropping angle in the wrong direction. It
seems that VertiTrak could be more sensitive to bit stability than
other assembly such as Autotrak Xtreme, etc. Therefore, I wonder if
you could share your knowledge/experience with me:
1.Has anybody had any experience of drilling with VertiTrak (Baker
Hughes Inteq product)?
2.Has anybody used the ReedHycalog PDC bit DSX616M-A22 and how is
the stability of this bit?
At Shell we have recently used the DSX616 both 12.1/4" and 8.1/2"
size in the Northern North Sea and Central with really good results.
Although we use Anadrill Powerdrive rather than Autotrack in the UK,
the drive system is very similar. We have seen very low tool shocks
(both stick slip and lateral)with the DSX616 and the alternative
RSX616. On paper it has an impressive torque response and in reality
it lived up to it. My initial selection of the DSX616 was based on
some impressive offset data from other operators, again using
I have also had really good experience with Hughes Christensen TX606
(not sure of they have recently changed their nomenclature)using
Autotrack, although was in far more benign formations in Brazil.
Reed Hycalog does seem to have the best cutter technology at the
moment (the dull bit gradings we have seen are far less than
expected), so would tend to go with them over Hughes if the runs were
of any decent length or through any hard/ abbrassive formations. Hope
this is of help.
BP had good experience with VertiTrak in 17 1/2" and 12 1/4" hole
sections of the two new wells that were drilled in the Rhum field.
BHI should be able to advise the run details.
BP had QA/QC representation in Italy when the tools were prepared.
Service standards from Italy were good, but I re-call a couple of
issues being caught by the QA/QC rep in Italy. Nexus (
http://www.nexuscentral.com/ contact Bill White) may be able to
advise further, or offer a similar QA/QC service.
Availability of BHI DDs, in Aberdeen, with experience of VertiTrak
As in Jie's note, bits with good stability are required to be used
with VertiTrak. All bit companies should be able to engineer
suitable bits, from a stability point of view. The majority of
VertiTrak runs will most likely have been with Hughes bits. Good
Hughes contacts are Greg Niescierowicz and Dougie MacDonald for
VetiTrak, and James Whittemore for Hughes bits used with VertiTrak
on Rhum (James has moved on from Aberdeen, but last I heard he was
still with Hughes).
The VertiTrak was a good solution to the drilling issues for Rhum.
I have not used the ReedHycalog DSX616M-A22 bit mentioned below so
can not comment on it's stability
Posted by Admin: For further information please contact SPREAD Admin
Sr, Drilling Engineer
Given the success of Vertitrak for the Rhum application I am
actively pursuing its use on a forthcoming HPHT well here in Brunei
where casing wear tolerance is very low.
I think in the Rhum experience it was beneficial to have both
directional and bit people from the same house. That's not to say
that it wouldn't work without alternative bits but I believe more
focus can be placed on engineering issues
Sr. Drilling Engineer
From my vague offshore experience on Rhum NF1 & SF1 wells with
* Both 17 1/2" & 12 1/4" hole sizes used vetitrak
* Mostly Hughes PDC's were used
* A Hughes rock bit was used to drill the Top Shetland limestone
* The tool needed to be in "slide" mode to work
* Excellent hole cleaning / Good ROP / slick wellbore
* Runs with 1000m+ were being achieved.
* BP QA/QC involved throughout
* Tools were supplied and serviced from Italy
* There may have been a few ROP performance issues where it was
unclear if it was tool or formation related.
Overall - the tool bit an excellent job
I would contact the authors of the papers below.
My personal preference is SQUARE Drill Collars or at least SQUARE
stabilisers used in Canada with success in the late nineties.
SPE/IADC 21905 Vertical Drilling by KTB/Eastman Christensen
1999 STD StraighT hole Drilling, AGIP.
1993 SPE/IADC 25759 Vertical Drilling Eastman/Teleco
1991 Rx: shock sub]
1983 Dowell Rx Dynadrill D1000 Straight hole
1966 Rx: Use Square Drill Collars! WORLD OIL's Drilling handbook.
Odfjell Drilling (Norway)
We have good experience using BHI Verti trac system on HPHT wells.
The first ones drilled in Europe.
We use the HCM609Z with powerdrive in teh chalk.