WellCAP Cross-reference Tool
Revision 010131
WellCAP Cross-Reference Tool
UNDERBALANCED DRILLING
WCT-2UBS-X – SUPERVISORY LEVEL
WELLCAP WCT-2UBS-X
SUPERVISORY LEVEL
WELLCAP
TRAINING TOPIC
OUTLINE
NO.
I.
SIMILARITIES AND
CONTRASTS
BETWEEN
CONVENTIONAL
DRILLING AND
UNDERBALANCED
DRILLING
A.
B.
C.
Definitions of conventional
and underbalanced drilling
Similarities
Differences
II.
UBD OVERVIEW
A.
B.
C.
Case studies
IADC classifications
HS&E
III.
UBD TECHNIQUES
A.
B.
C.
D.
E.
Air and natural gas drilling
Mist drilling
Foam drilling
Aerated fluid drilling
Flow drilling (gas flaring &
onsite oil storage)

MANUAL
(Cite Chapter and
Page No.)
REFERENCE TO APPLICATION MATERIALS
(Note Where Each Topic Can Be Found)
LECTURE
SIMULATION
(Note Day/Time of
Course Outline)
(Identify Exercise)
OTHER
RESOURCE
(Identify Video, CBT
Program, Handout,
Etc.)
To further facilitate cross-referencing, the proposed document may include a margin or parenthetical reference to the appropriate WellCAP outline number.
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WCT-2UBS-X – SUPERVISORY LEVEL
WellCAP Cross-reference Tool
Revision 010131
WELLCAP WCT-2UBS-X
SUPERVISORY LEVEL
WELLCAP
TRAINING TOPIC
OUTLINE
NO.
F.
G.
Mud cap drilling
Snub drilling
H.
I.
Production drilling (PD)
Liquid drilling
IV.
DOWNHOLE
CALCULATIONS FOR
UBD TECHNIQUES
A.
Dynamic (equivalent
circulating densityment
circulating density) vs.
static (hydrostatic)
Manual – kill fluid
calculations (conventional)
Multi-phase flow modeling
B.
C.
V.
DETECTING
SURFACE CONTROL
PROBLEMS
A.
B.
C.
Fluid volumes at surface
Pressure
Determining need for
conventional well control
Elastomer
considerations/flow path
D.
VI.
UBD EQUIPMENT
AND RIG UP
A.
Rotating diverter control
head
Separation equipment
Flare line sizing and hook
up
B.
C.
MANUAL
(Cite Chapter and
Page No.)
REFERENCE TO APPLICATION MATERIALS
(Note Where Each Topic Can Be Found)
LECTURE
SIMULATION
(Note Day/Time of
Course Outline)
(Identify Exercise)
OTHER
RESOURCE
(Identify Video, CBT
Program, Handout,
Etc.)
2 of 6
WCT-2UBS-X – SUPERVISORY LEVEL
WellCAP Cross-reference Tool
Revision 010131
WELLCAP WCT-2UBS-X
SUPERVISORY LEVEL
WELLCAP
TRAINING TOPIC
OUTLINE
NO.
D.
E.
Flare line igniters
Flame arresters
F.
G.
H.
Kill line hook ups
Choke manifold hook ups
Stripping
manifolds/methods
Choke considerations
Drillstring floats
BOP stack configurations
Fluid transfer systems and
level maintenance
Onsite fluid storage
systems
Emergency well control
equipment
Standpipe manifold
Gas vs liquid injections
Compromise on
conventional Pit Volume
Totalizer (PVT) system
Coiled tubing
Snubbing
Deployment valves
I.
J.
K.
L.
M.
N.
O.
P.
Q.
R.
S.
T.
VII.
ACCUMULATOR
TESTING AND
MAINTENANCE
A.
B.
Scheduled maintenance
Scheduled testing
C.
Written
testing/maintenance report
MANUAL
(Cite Chapter and
Page No.)
REFERENCE TO APPLICATION MATERIALS
(Note Where Each Topic Can Be Found)
LECTURE
SIMULATION
(Note Day/Time of
Course Outline)
(Identify Exercise)
OTHER
RESOURCE
(Identify Video, CBT
Program, Handout,
Etc.)
3 of 6
WCT-2UBS-X – SUPERVISORY LEVEL
WellCAP Cross-reference Tool
Revision 010131
WELLCAP WCT-2UBS-X
SUPERVISORY LEVEL
WELLCAP
TRAINING TOPIC
OUTLINE
NO.
D.
Special considerations
VIII.
SURFACE
EQUIPMENT
TESTING AND
MAINTENANCE
A.
B.
Trapped pressure issues
Gas vs liquid BOP stack
tests
IX.
BOTTOMHOLE
PRESSURE
CONTROL
A.
B.
Underbalanced margin
Choke control and surface
pressure
Hydrostatic vs friction
dominated flow
Surface pressure limitations
C.
D.
X.
MAKING TRIPS,
COMPLETIONS,
LOGGING AND
CONNECTIONS
A.
B.
C.
D.
Tripping in hole
Tripping out of hole
Making a connection
BHA deployment
XI.
PIPE "LIGHT"
CALCULATIONS
AND OPERATIONS
A.
Calculations
MANUAL
(Cite Chapter and
Page No.)
REFERENCE TO APPLICATION MATERIALS
(Note Where Each Topic Can Be Found)
LECTURE
SIMULATION
(Note Day/Time of
Course Outline)
(Identify Exercise)
OTHER
RESOURCE
(Identify Video, CBT
Program, Handout,
Etc.)
4 of 6
WCT-2UBS-X – SUPERVISORY LEVEL
WellCAP Cross-reference Tool
Revision 010131
WELLCAP WCT-2UBS-X
SUPERVISORY LEVEL
WELLCAP
TRAINING TOPIC
OUTLINE
NO.
B.
Operations
XII.
COMPLICATIONS
WHILE DRILLING
UNDERBALANCED
(SUPERVISORY
LEVEL ONLY)
A.
Excessive surface
pressures and high
pressure pumping
consideration
Leak in pressure control
equipment
Loss of pumping capability
Plugged bit
Cut out choke or manifold
or plugged choke
Loss of ability to circulate
Bit nozzle washout
Casing or cement failure
Drill pipe or coil washout
B.
C.
D.
E.
F.
G.
H.
I.
J.
K.
L.
M.
N.
O.
P.
Q.
MANUAL
(Cite Chapter and
Page No.)
REFERENCE TO APPLICATION MATERIALS
(Note Where Each Topic Can Be Found)
LECTURE
SIMULATION
(Note Day/Time of
Course Outline)
(Identify Exercise)
OTHER
RESOURCE
(Identify Video, CBT
Program, Handout,
Etc.)
Parted drill pipe/coil
Open hole loss of
circulation
Formation influx
Leaking float valves
Gas leak from BOPs to
accumulator
Critical escalating problems
Injection line leaks
Hole cleaning
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WCT-2UBS-X – SUPERVISORY LEVEL
WellCAP Cross-reference Tool
Revision 010131
WELLCAP WCT-2UBS-X
SUPERVISORY LEVEL
WELLCAP
TRAINING TOPIC
OUTLINE
NO.
R.
S.
Hole stability/collapse
Corrosion
T.
U.
V.
W.
Down hole fire
Foam stability
Flash points
Hydrogen sulfide kick
XIII.
IADC UBD TOUR
REPORT
A.
Purpose and importance
XIV.
SITE MANAGEMENT
ISSUES
A.
Safe explosion radius for
equipment
Crew training
B.
XV.
SIMULATOR
TRAINING
(SUPERVISORY
LEVEL ONLY)
A.
B.
Drilling fluid design
Multi-phase flow
characteristics
Problem detection and
response
C.
MANUAL
(Cite Chapter and
Page No.)
REFERENCE TO APPLICATION MATERIALS
(Note Where Each Topic Can Be Found)
LECTURE
SIMULATION
(Note Day/Time of
Course Outline)
(Identify Exercise)
OTHER
RESOURCE
(Identify Video, CBT
Program, Handout,
Etc.)
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WCT-2UBS-X – SUPERVISORY LEVEL