Cac loai gian khoan

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Cac loai gian khoan

  1. 1. The Drilling Rig and Its Crew
  2. 2. Types of Rigs• Onshore or land rigs• Offshore rigs – Barges – Drilling Tenders – Platforms – Jack-ups – Semisubmersibles – Drillships
  3. 3. Land Rigs • Cantilever mast – most common arrangement • Portable mast – usually mounted on trucks that incorporate the hoisting machinery, engines and derrick as a single unit
  4. 4. Land Rigs
  5. 5. Land Rigs
  6. 6. Drilling Barges• Mobile, flat bottomed shallow draft vessels• Used for drilling in swampy or shallow coastal waters (8-20 ft) – West African river deltas, US Gulf Coast, Maracaibo, Kalimantan• Limited stability and can be used in very calm waters• Need utility barges because of limited storage space
  7. 7. Drilling Barges
  8. 8. Drilling Tenders• Non-self-propelled barges or semisubmersibles• Moored alongside a platform• Derrick equipment on platform• Allows less costly platforms to be used for development
  9. 9. Drilling Tenders
  10. 10. Platforms• Fixed-bottom or rigid – rigid structures extend from the seabed to all the way above the surface of the water – Steel jacket or concrete gravity (CGS)• Floating – float near the water surface – Tension leg (TLP), Spar
  11. 11. Type of Platforms Type of Connection to Seabed Example PlatformFixed-bottom Piles Steel jacket Gravity Concrete Gravity Structure (CGS)Floating Tethers Tension Leg Platform (TLP) Catenary mooring lines Semi-submersible, Spar Single Point Mooring Ship-shaped vessel (FPSO) (SPM)
  12. 12. Platforms
  13. 13. Jack-ups • Mobile self- elevating rigs equipped with long support legs • Designed to drill in <350 ft of water • Very stable
  14. 14. Jack-ups (NEW) • Spud cans xxxxxx
  15. 15. Semisubmersibles • Have a water ballasting system that can partially submerge its vertical stabilizing columns • Anchor-moored or dynamically positioned • Can operate in water depths of up to 6000 ft. • Operational depth limited by mooring equipment and riser handling capacity • Can work in harsh environments like the North Sea
  16. 16. Semisubmersibles
  17. 17. A Word On Dynamic Positioning• Dynamic Positioning – is a technique used on floaters utilizing large computer-controlled on-board propulsion units (pitch propellers or “thrusters”) controlled by a satellite navigation system to maintain the position of a vessel with respect to a point on the seabed• Range of weather conditions is limited• Generally not used in water depths of less than 3000 ft• Because of large fuel consumption it is only economically feasible in the ff circumstances: – Frequent location changes are required – Anchor lengths required are excessive (>3000 ft)
  18. 18. Drillships • Capable of drilling in very deep water (>6000 ft) • Offer greater mobility than a “semi” or jack- up • Greater storage facilities • Anchor-moored or dynamically positioned • Limited to areas where wave action is not severe
  19. 19. Keyway• The keyway is the opening on an inland barge or offshore jackup in which the drilling operations are performed.
  20. 20. Moonpool• The hole through a floater or semi- submersible structure is which the drilling operations are performed.
  21. 21. Rig Setup
  22. 22. Rig Crew• Offshore Installation Manager (OIM) (for offshore rigs only)• Rig Superintendent or Day Toolpusher• Night Toolpusher• Drillers• Assistant Drillers• Derrickman• Motorman• Roughnecks
  23. 23. Rig Crew• Roustabouts• Electricians• Mechanics• Crane Operator• Catering Crew
  24. 24. Driller
  25. 25. Derrickman
  26. 26. Roughneck
  27. 27. End of Topic

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