spe 89632 further advances in coiled tubing floater operations...spe 89632 further advances in...
TRANSCRIPT
SPE 89632 Further advances
in coiled tubing floater operations Alastair Buchanan
Schlumberger Well Services North Sea Coiled Tubing Services Geomarket Engineer
2 28.09.16
n Norwegian Continental Shelf Activity n Conventional Approach n Issues and Strategies n Equipment Developments
– Advanced Tension Frame (ATF) – Riser Slip Joint
n Impact n Conclusions
Agenda
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Norwegian Continental Shelf Subsea Activity n 420 active wells n Increasing 10% p.a. n 60% Statoil production n Severe weather and
sea conditions n Demand for
intervention with CT increasing
n Available installations semi-sumbersible rigs
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Conventional Scenario n Injector suspended from
winch n Multiple degrees of freedom
of movement n Influenced by heave, pitch,
roll and reel tension
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Conventional Scenario n Injector suspended from
winch n Multiple degrees of freedom
of movement n Influenced by heave, pitch,
roll and reel tension n Tension frame coupled to
riser n Multiple transfers between
motion frame of reference
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Conventional Scenario n Injector suspended from
winch n Multiple degrees of freedom
of movement n Influenced by heave, pitch,
roll and reel tension n Tension frame coupled to
riser n Multiple transfers between
motion frame of reference
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Issues and Strategies
EFFICIENCY
SAFETY
RELIABILITY
ACTIVITY
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Advanced Tension Frame n Injector head is constrained at
all times – motion is controlled
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Slip joint n Influence of heave isolated
below rig floor
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Slip joint
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Impact 1 – Safety and Efficiency
Conven - ATF Conv . +slip - joint
ATF + slip - joint
Transfer 2 crew up Install BOP + BHA 1 Install injector Transfer 2 crew down Transfer 2 crew up Change to BHA 2 Transfer 2 crew down Transfer 2 crew up Remove injector head Remove BOP Transfer 2 crew down Total HEL count
Operation stage Scenario
Conventional ATF Conventional +slip-joint
ATF + slip - joint
Transfer 2 crew up Install BOP + BHA 1 Install injector Transfer 2 crew down Transfer 2 crew up Change to BHA 2 Transfer 2 crew down Transfer 2 crew up Remove injector head Remove BOP Transfer 2 crew down Total hazard level
2 0 0 2 2 0 2 2 0 0 2
12
2 0 0 2 2 0 2 2 0 0 2
12
Operation stage Scenario
2 12 12
2 2
12 2 2
12 12
2
2 12 12
2 2
12 2 2
12 12
2 72 186 186
6 30 30
6 6
30 6 6
30 30
6
6 30 30
6 6
30 6 6
30 30
6
6
2 6 6 2 6 6 2
30 6
102
6
2 6 6 2 6 6 2
6
30
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Impact 2 – Reliability vs Weather
0 10 20 30 40 50 60 70 80 90
100
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Available days
% of total
Conventional Slip-joint
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Conclusions
n Field tested technology is available which is demonstrated to improve reliability and safety
RELIABILITY
SAFETY
EFFICIENCY RELIABILITY EFFICIENCY
SAFETY
ACTIVITY ACTIVITY