Main Features
It adopts AC-SCR-DC
drive mode, using DC motors to drive drawworks, rotary table and mud pump, realizes stepless speed regulation to satisfy
completely the drilling technology requirements.
K-type derrick (mast) and swing-up substructure, the drill floor height 9m or 10.5m, and drill floor equipments can be installed at low position
and lifted integrally by drawworks.
Hydraulic disk brake or band brake is used as the main brake of the drawworks, the assistant brake is
electromagnetic eddy current brake with air cooling or water cooling. The drawworks may eq uip EATON
pneumatic disk brake with water cooling as requested by customer too.
The rotary table can be driven by drawworks, or DC motor independently.
The driller 's cabin integrates the electric, hydraulic, pneumatic controls into video communication,
the driller can perform all drilling parameter setting in the air conditioned room , the working condition
be improved and the labor intensity be lightened greatly.
Satisfy the requirement for TDS installation
Basic Parameter Of Varied Rigs
| Rig Model | ZJ50D | ZJ70D |
| Nominal drilling depth, 127mm(5″)DP, m | 5000 | 7000 |
| Max. hook load, kN(t) | 3150（315） | 4500（450） |
| dill line system of travelling system | 6×7 | 6×7 |
| Dia. Of drill line，mm | 35 | 38 |
| Max. pull of fastline, kN | 350﹙35﹚ | 485﹙48.5﹚ |
| Drawworks | Model | JC-50D | JC-70D |
| Rated power, kW(hP) | 1100(1500) | 1470(2000) |
| Gears | 2（4） | 4 |
| Main brake | hydraulic disk brake | hydraulic disk brake |
| Assistant brake | Eddy current brake(EATON) | Eddy current brake(EATON) |
| Crown block | TC-315 | TC-450 |
| Travelling block | YC-315 | YC-450 |
| OD of sheaves of hoisting system, mm | 1270 | 1540 |
| Hook | DG-315 | DG-450 |
| Swivel | Model | SL-450 | SL-450 |
| Dia. of stem bore | 75 | 75 |
| Rotary table | Opening dia. mm(in) | 952.5(37 1/2) | 952.5(37 1/2) |
| Gears | I OR II, stepless speed regulating |
| Drive mode | independent or compound drive |
| Derrick (mast) | Type | JJ315/45-K | JJ450/45-K |
| Height, m | 45m | 45m |
| Max. load, kN(lbs) | 3150(700000) | 4500(1000000) |
| Racking board height, m | 24.5, 25.5, 26.5 | 24.5, 25.5, 26.5 |
| Substructure | Type | DZ315/9-S | DZ450/9(10.5)-S |
| Drillfloor height | 9 | 9 (10.5) |
| Clearance height under rotary beam, m | 7.6 | 7.4 ( 9 ) |
| Capacity of mud circulating system | | |
| Mud pump | Model×number | F-1300×2 | F-1600×2 |
| Drive mode | DC motor |
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