Export and Offloading System

Question 1

Oil export system key componants (7) ?

Answer 1

1. Subsea Flexible Flowline
2. Pipeline End Manifold (PLEM)
3. Under Buoy Hose
4. Catenary Anchor Leg Mooring (CALM) Buoy
5. Floating Hoses
6. Storage Tanker (FSO)
7. Shuttle Tanker Tandem Mooring System.

Question 2

FSO Key details (6) ?

Answer 2

1. 300,000bbls double skinned converted MR class product tanker
2. 250,000 bbls parcel size
3. 24 hr loading in 36 hr laycan
4. FSO (45,000 DWT) with modified arrangements for import/export hose system.
5. Acceptable Classficaiton Society (5+ years till next cert);
   
   • ABS / Lloyds / DnV / BV
6. Fast Rescue Craft (FRC)

Question 3

Shuttle Tanker key design parameters (5) ?

Answer 3

1. Expected to be Aframax range to 110,000 DWT
2. Export flowline is 6” ID
3. Export flowline approx. 1200m length
4. Product flow rate 35,000 BFD
5. Tanker mooring load on CALM Buoy not more than 150tonnes

Question 4

CALM Bouy to PLEM connection

key features (6) ?

Answer 4

1. No Sat divers for install
2. diverlessly with an ROV or at a depth of less than 50m
3. CALM buoy includes a single path 8” fluid swivel and process pipework
4. flowline runs from the MODPU down a riser tube, along the seabed to the PLEM
5. subsea riser connects PLEM to the CALM buoy underside
6. the riser can be in a lazy wave or a Chinese lantern configuration

Question 5

PLEM key features (6) ?

Answer 5

1. Pipeline End Manifold (PLEM)
2. 8” NB pipe work
3. a pigging loop,
4. allowance for a secondary line and riser (connected later if reqd).
5. A yoke installation aid
6. No sat divers - ROV to actuate hydraulic clamp connection systems.

Question 6

CALM Bouy key features (6) ?

Answer 6

1. a single path 8” fluid swivel (and process pipework)
2. Boat landing (with a recessed ladder and bollard)
3. Navaid
4. Safety Equipment
5. 3 x 2 mooring legs equally spaced 120deg.
6. Stevpris type Drag anchors (or gravity if embedment is poor)