The
focus
of
global
oil
&
gas
development
is
moving
towards
the
offshore
deep
and
ultradeep
formations.
However,
well
drilling
a
changing
task
due
to
low
rate
penetration.
In
this
work,
high
efficiency
rock-breaking
idea
forming
an
isolated
M-type
rock
column
in
center
bottomhole,
that
is,
novel
convex
stepped
bottomhole
(MCSB)
new
type
central-grooved
PDC
bit
for
are
proposed.
Based
on
thermal-fluid-solid
coupling,
numerical
simulation
model
stress
field
MCSB
established,
investigated.
Meanwhile,
ROP
enhancement
mechanism
also
revealed.
research
shows
its
surrounding
area
subjected
tensile
stresses
circumferential,
radial,
axial
directions,
which
helps
improve
breaking
efficiency.
When
core
blade
length
around
70
mm
apex
angle
90°
with
diameter
215.9
mm,
reaches
maximum
MCSB.
Energies,
Journal Year:
2025,
Volume and Issue:
18(7), P. 1608 - 1608
Published: March 24, 2025
Developing
clean
and
renewable
energy
instead
of
the
ones
related
to
hydrocarbon
resources
has
been
known
as
one
different
ways
guarantee
reduced
greenhouse
gas
emissions.
Geothermal
systems
native
hydrogen
exploration
could
represent
an
opportunity
diversify
global
matrix
lower
carbon-related
All
these
natural
sources
require
a
well
be
drilled
for
its
access
and/or
extractions,
similar
petroleum
industry.
The
main
focuses
this
technical–scientific
contribution
research
are
(i)
evaluate
matrix;
(ii)
show
context
over
years
future
perspectives
on
geothermal
exploration;
(iii)
present
analyze
importance
developing
technologies
drilling
process
optimization
aiming
at
accessing
resources.
In
2022,
was
composed
mainly
nonrenewable
such
oil,
gas,
coal,
where
combustion
fossil
fuels
produced
approximately
37.15
billion
tons
CO2
in
same
year.
2023,
USD
1740
invested
globally
reduce
emissions
combat
context,
currently,
about
353
power
units
operation
worldwide
with
capacity
16,335
MW.
addition,
globally,
there
35
under
pre-construction
(project
phase),
93
already
being
constructed,
recently,
45
announced.
Concerning
hydrogen,
industry
announced
680
large-scale
project
proposals,
valued
240
direct
investment
by
2030.
Brazil,
company
Petroleo
Brasileiro
SA
(Petrobras,
Rio
de
Janeiro,
Brazil)
will
invest
coming
nearly
4
million
involving
generation,
since
(oil
systems,
among
others)
achieved
through
wells,
document
presents
contextualization
social
interest.
The
focus
of
global
oil
&
gas
development
is
moving
towards
the
offshore
deep
and
ultradeep
formations.
However,
well
drilling
a
changing
task
due
to
low
rate
penetration.
In
this
work,
high
efficiency
rock-breaking
idea
forming
an
isolated
M-type
rock
column
in
center
bottomhole,
that
is,
novel
convex
stepped
bottomhole
(MCSB)
new
type
central-grooved
PDC
bit
for
are
proposed.
Based
on
thermal-fluid-solid
coupling,
numerical
simulation
model
stress
field
MCSB
established,
investigated.
Meanwhile,
ROP
enhancement
mechanism
also
revealed.
research
shows
its
surrounding
area
subjected
tensile
stresses
circumferential,
radial,
axial
directions,
which
helps
improve
breaking
efficiency.
When
core
blade
length
around
70
mm
apex
angle
90°
with
diameter
215.9
mm,
reaches
maximum
MCSB.
