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Hello Augusto (Augusto),
1 new response received in group: Drilling Operations
responsible for ROP performance
Baraket Mehri (Baraket) of Saudi Aramco, from Portugal on
June 13, 2018 10:49:30
Is there any study to quantify the responsibility of each contributor to
ROP (or Feet per day)?
There are many contributors: rig company, directional drilling company,
operator or well owner...
Augusto CarmonaDaMota (Augusto) of SPREADAssociates, on March 28,
" Auld" Technology,
Fina, Angola 1967-73 As a new drilling engineer, I was collating all data
to enable an acceptable drilling programme.
past experience in the field was the major input. One of the Security
tricone bits - S6 - was the winner by far, Security elected to drop the
Tool Company provided very useful indications in their old catalogs,
showing the recommended parameters Weight on Bit and RPM. That was a good
start up for deciding on the amount of Drill Collars and how to nurse the
bit. The Driller was encouraged to find the winning W x N
combinations, within the HTC diagram
Drilling Engineer was also in charge of the hydraulic design. Either you
maximize the Hydraulic Horse Power at the bit or the jetting velocity.
There were charts –e. g. REED - to help you finding the pressure losses
in the drilling string.
TOTAL North Sea by 1980´s was the fastest Operator drilling in the North
Sea. Their Drilling Engineer, Patrick Daget, had a bit program built in
his computer that collated the data in a faster and more efficient
SMFi As a
result of French Research a bit with a nozzle looking upwards – the ARTEP
concept - was the winner!
PATRICK DAGET elected to create his own Drilling Software Package where
the bit programme shows up, See TECHDRILL DSP ONE.
BIT INTERNACIONAL) formerly "Globe" a known copy-catter,
re-started with a new design... ensuring a cylindrical hole! USA,
Egypt, etc confirmed this user-friendly bit which was not faster, didn´t
last longer, BUT ensured a hole that required no REAMING and no FISHING
for lost pieces, For me, the winner!
bit records ignore the amount of REAMING and FISHING – this is only
qualitatively mentioned, as it can´t be integrated as feet and hours!)
So it is up to the DRILLING TEAM, Driller-Toolpusher-Engineer, to optimize the ROP based on reliable
computer programs and taking the BIT RECORDS with a spec of a doubt.
BEWARE that not-so-good bits are NEITHER penalized by the extra-effort in
reaming of the subsequent bit NOR by the time consuming fishing of lost
SUMMING UP It is not the apparent drilling velocity BUT the hole quality
that really matters.