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Content by the Nabors technical team: Ron Morrison, Senior Vice-President, NDUSA Engineering & Technical Services
Artwork & rendering: Lowell Reed, Loadmaster Universal Rigs Inc. Graphic coordination: Chris Jones, Xenon Group | www.xenongroupdesign.com
Copies of this poster may be obtained from PennWell.To order: call 713/963-6210; fax 713/963-6228; e-mail [email protected];
or submit request to 1700 West Loop South, Suite 1000, Houston, TX 77027.Reproduction of the contents of this poster, in any manner, is prohibited without the consent of PennWell Corp. ©2007
OIL & GAS JOURNAL1700 West Loop South, Suite 1000
Houston, TX 77027 USAwww.ogjonline.com
Editorial direction and coordination fromNina M. Rach, Drilling Editor
Warren R. True, Chief Technology Editor–LNG/Gas Processing
Modern AC Land Drilling Rig
®
Mast, substructureThis poster depicts typical equipment being
manufactured for mid-depth range drilling, designed for mobility, drilling efficiency, safety, and minimal environmental impact. These “fast-moving” rigs can be transported in predetermined loads that meet permitted dimensions and weights for roads. No cranes are needed for assembly (“self-erecting”); the telescoping derrick 2 and three-piece substructure are lifted by two hydraulic raising cylinders 18 . The substructure’s subbase 19 hasremovable girder sections to provide clearance for the rig to be moved (skidded) along a row of wells for cluster drilling (skids not shown here).
AC driveDeveloped in the early 1990s, alternating-current
drives were first used to drill offshore before being adapted for land. Troll A in the North Sea used the world’s first AC drilling system. AC drives offer more precise speed and torque control and quieter operation. The engine/generator sets 24provide power to the variable-frequency-drive house. The VFD and MCC 25 feed the AC motors 32 that power the drawworks 26 .
Pipe handlingAutomated systems provide a safer work
environment than manual and reduce potential for injuries. Automated pipe-handling equipment reduces the chance of dropped pipe, casing, and tubing used in drilling and completing wells. With a handheld remote control (a redundant control board is at the far end of the catwalk), the driller directs mechanical arms to move tubulars from the pipe racks 15 onto the catwalk 16 . The skate moves individual tubulars up the pipe ramp (V-door) 17 to the drill floor.
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MAIN RIG1. Crown block2. Mast, derrick3. Drill pipe, triple stand4. Monkey board5. Gooseneck6. Traveling block7. Tubing board8. Top drive9. Driller’s cabin
10. Standpipe11. Mud-gas separator12. Mud pit, cuttings containment13. Flare pipes14. Wireline spool15. Pipe racks16. Catwalk with pipe skate17. Pipe ramp, V-door18. Hydraulic raising cylinder19. Substructure20. Parts house21. Accumulator unit22. Water tank
23. Fuel tank24. Engine/generator sets25. Variable frequency drive (VFD) house
& motor control center (MCC)
RIG FLOOR26. Drawworks27. Iron roughneck28. Rotary table29. Mousehole, covered30. Standpipe manifold31. Deadline anchor32. AC motors33. Winches
FLUID SYSTEM34. Choke manifold35. Mud return line36. Mud (shale) shakers37. Desander/desilter, mud cleaner38. Degasser39. Tanks, agitators40. Mud pumps
PRESSURE CONTROL SYSTEM 41. Annular blowout preventer42. Pipe rams43. Blind rams44. Choke line & valves45. Kill lines & valves46. Drilling spool47. Pipe rams
DOWNHOLE COMPONENTS 48. Cellar49. Casing head50. Cemented conductor51. Casing52. Drill pipe53. Bottomhole assembly54. Drillbit
LEGEND
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