FE 02-02 Rig Types and Rig Crew

Nội dung text: FE 02-02 Rig Types and Rig Crew

1. Types of Rigs • Onshore or land rigs • Offshore rigs – Barges – Drilling Tenders – Platforms – Jack-ups – Semisubmersibles – Drillships
2. 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
3. Land Rigs
4. Drilling Barges
5. Drilling Tenders
6. Type of Platforms Type of Connection to Seabed Example Platform Fixed-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)
7. Jack-ups • Mobile self- elevating rigs equipped with long support legs • Designed to drill in <350 ft of water • Very stable
8. 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
9. 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 following circumstances: – Frequent location changes are required – Anchor lengths required are excessive (>3000 ft)
10. Keyway • The keyway is the opening on an inland barge or offshore jackup in which the drilling operations are performed.
11. Rig Setup
12. Rig Crew • Roustabouts • Electricians • Mechanics • Crane Operator • Catering Crew
13. Derrickman
14. End of Topic