Drilling with Steerable liners on Gullfaks.

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Drilling with Steerable liners on Gullfaks.

• Gullfakslandsbyen 2007

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Equipment

1. Drillstring from surface to liner hanger/packer
2. Liner Hanger / Packer
3. Latch between liner hanger, liner and inner
   string (drill pipe)
4. Inner string (Drill pipe)
5. Liner
6. Latch between innerstring, liner and BHA
7. Motor (For bit RPM)
8. MWD and LWD
9. 3D RSS (Rotary Steerable System)
10. Reamer shoe or hole opener
11. Pilot bit

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5
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10
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9
7
8
1
4
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Operations step by step

• Make up reamer shoe, liner and linerhanger and
  set this in slips in rotary table
• Make up BHA / inner string and trip in by using a
  false rotray table
• Latch on to liner
• Trip in with complete system to TD
• Rotary drill to TD, liner RPM is 80, bit RPM 200
  (due to motor)
• Relatch inner string and BHA from liner and liner
  hanger
• Trip out with BHA
• Cement the liner in place conventionally

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Oppgave

• Hvilke type brønner kan dette systemet benyttes?
• Lange seksjoner?
• Korte seksjoner?
• Grunne seksjoner?
• Dype seksjoner?
• Brønndesign?
• Hvilke situasjoner vil dette hjelpe oss?
• Trykksoner?
• Doglegs?
• Alternativer dersom vi ikke klarer å bore
  planlagt seksjon?
• Får vi dette assembliet ut av hullet igjen?
• Er dette en alternativ metode for Gullfaks?
  Eventuelt hva burde videreutvikles.