The document outlines the steps to install a pile using a sub sea vertical borer (SVB), which includes lowering a guide frame onto the sea bed, inserting a pile into the frame which then self-penetrates the sea bed, lowering the SVB onto the pile to begin drilling and removing spoil with an under-reamer, and finally recovering the SVB and guide frame to complete the pile installation.

1. SVB
Sub Sea Vertical Borer

2. SUB SEA GUIDE FRAME LOWERED
& LANDED ON TO SEA BED

3. SUB SEA GUIDE FRAME
LEVELLED ON SEA BED

4. PILE LOWERED INTO SUBSEA FRAME
EXTERNAL PILE GRIPPER DE-ACTIVATED

5. PILE SELF PENETRATION
EXTERNAL PILE GRIPPER ACTIVATED

6. SVB LOWERED INTO PILE
INTERNAL PILE GRIPPER DE-ACTIVATED
(CLEARANCE)

7. INTERNAL GRIPPER
ACTIVATED (LOCKED)

8. BEGIN DRILLING
DEPLOY UNDER-REAMER
SPOIL REMOVAL BY SUBSEA
DREDGE

9. DRILL/UNDER-REAM
FULL STOKE

10. UNDER REAMER RETRACT
EXTERNAL TOP GRIPPERS
DE-ACTIVATED
PILE LOWERED

11. EXTERNAL BOTTOM GRIPPER
DE-ACTIVATED
BOTTOM GRIPPER RETRACTED
ALL EXTERNAL GRIPPERS
RE-ACTIVATED
RE-START DRILL &
UNDER REAM

12. DRILL/UNDER REAM FULL STOKE
RETRACT DRILL

13. FINAL DRILL – DRILL/UNDER REAMER
RETRACTED
DE-ACTIVATE EXTERNAL TOP PILE
GRIPPERS
PILE LOWERED

14. SVB RECOVERED TO DECK
GUIDE FRAME RECOVERED
PILE INSTALLATION COMPLETE