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7000m Land Drilling Rig, AC-SCR-DC

2015-07-12 01:49      Click£ºtimes

1. Drill rig models and basic technical parameters conform to Chinese petroleum industry standards. All main components conform to API specifications.

2. The drilling rig is equipped with a diesel generator set as the power source and uses the direct current electric dirve mode ( by means of AC-SCR-DC) and the "one-to-two" control mode. These two modes feature advanced mechnical properties, convenient and reliable control, fully satisfying the needs of modern drilling technology. 

3. The self lift (slingshot) type substructure is used. The mast and all equipment on the drill floor are assembled in a low position and then raised integrally. 

4. The closed draw works with stepless variable drive through four gear shifts and the turnover type sinking rotary drive case are used, all connections are made by card an shafts. The drill floor is smooth and spacious. 

5. The advanced solids control system is used, it features reasonable purifying process and novel structure.

 

Technical Specifications:

Nominal drilling depth: 7,000 m with 114mm (4-1/2) DP
Rig rated max. static load capacity: 4,500kN with 12 lines
                                                     3900kN with 10 lines
                                                      3000kN with 8 lines
Maximum DP weight: 2,200KN
Rated input power of draw works: 2×800kW
draw works shifts: 4+4R shift, stepless speed regulation
Rotary table: ZP375, 37 1/2 (952 mm) opening, DC motor drive 1+1R shift, stepless   speed regulating
Lines strung up: 12 (6×7) lines
OD of drill line: 1-1/2 (38mm)
OD of the block sheave: 1524mm
Internal diameter of swivel stem: 75mm3
The mast: K shape, 45.5m clearance. Capacity of set back board: 7000m (4-1/2DP), 4 stands of 10 DC and 6 stands of 8 DC.
Substructure: Sling shot type 
Drill floor: height of 10.5m. net clearance of 8.92m
Power transmission type: AC-SCR-DC control 
Model and number of engine generator set: CAT 3512BDITA/ SR4B×4
Model and number of auxiliary generator set:  CAT3406DITA×1
draw works motors: 2 ×800kW
Mud pump motors: 2×800kW for each
Rotary table motor: 1×800kW
Auto-driller motor: 1×45kW
SCR nos: 6 SCR, 1  for the each mud pumps, 2 for the draw works.1 for the rotary table

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