spe 89632 further advances in coiled tubing floater operations...spe 89632 further advances in...

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