IDPT - 03 - Circulating System - Hole Volume, Hydrostatic and Slugs
IDPT - 01A - Rig Types
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Transcript of IDPT - 01A - Rig Types
IPM
Rig Types
Can be broadly divided into 6 different types
•Land•Submersible•Jack-up•Platform•Semi-submersible•Drill Ship.
IPM
Land Rigs
They typically come in light, medium or heavy configurationIs moved using heavy trucks and cranes Small rigs may only drill to a few thousand feet.But larger ones are capable of 20000 and more
IPM
Submersible / Barge
Tend to drill in fairly shallow water. They flood the legs with water and submerge. Some of the rig is above water, and crews drill from that location. Swamp type, river and inland bay areas are very suitable for some of these rigsSpecially constructed submersibles are also used in extremely cold areas. Typical water depths are 20 feet
IPM
Jack-up Rigs
Have lattice legs which can be hoisted and lowered at will.They are hoisted and the rig is either towed or transported by ship.When in location, the legs are lowered to the sea-bed. Jack-up rigs can drill in water depths up to 400ft
IPM
Platform / Tender Rigs
Are immobile once built.However, they drill several wells from the one location. They can be tender assisted.Three types of Platform are:Steel Jacket, Caisson Type and Concrete Gravity
IPM
Semi-submersible
Has hollow legs and pontoons. Like the submersible, the legs are also flooded However, anchors and/or Thrusters and Positioners keep the rig in position, When thrusters are used, it is called Dynamic Positioning (computer controlled), This system steadies the rig over the hole.Crews use a Subsea Blowout control preventers
IPM
Drill Ship
Are self propelled, floating offshore drill units, They use a Subsea Blowout control system similar to Semi-submersibles.A template which has holes drilled though it is fitted to the sea bed This is where the drilling is to take place.The Semi-submersible and Drillships align themselves over these templatesThen they commence drilling.
IPM
Typical Land Rig Organization Chart• Rig Superintendent
LPT Leader
Assistant Rig Sup
Chief Electrician Chief Mechanic Drillers Labour Pusher Medic Radio Operator
Electrician Mechanic
Trainee Trainee
Derrickman
Mud Tester
Floorman
Crane -optr
Roustabout
W-houseman Welder
Driver
Camp Boss
Painter
Carpenter
Catering crew