Main Features
The rig mainframe is equipped with rig moving device, which can move the rig with setback load
within wellsite; the power and drive system once installed well, they can not be moved again, it
is suitable for cluster well drilling.
The drilling pump and generator (wide frequency) are driven by the mode of “ diesel + coupling
gear box + chain drive compound ” or “ diesel + parallel operation with V-belt ” , the drawworks and rotary table are driven by AC variable frequency motors. This kind of
rig not only has the main functions and features of AC VF electric rig, but also has low price compared
to AC VF electric rig, and has outstanding energy saving effect.
Single shaft drawworks, one gear stepless speed regulating, full digital close – loop control of AC VF electric drive, completely preset for safety protection, convenient for operation.
The hydraulic disk brake and dynamic brake are adopted in drawworks, the hydraulic disk brake is
used only in manual bit feeding, orientation, parking and emergency brake.
The auxiliary drive device can be used for hoisting the max. weight of drill string while the main drive
fails, it can realize the constant WOB auto-bit-feeding, the WOB control precision is perfect.
Modular design, reasonable layout and power distribution aid each other well, the efficiency of power
using is high.
The driller cabin integrates the functions of electric (digital), hydraulic, pneumatic control and video
communication, can achieve the functions for collecting, displaying, storing, printing of drilling parameters,
and perfect functions of monitoring, protection and failure self-diagnosis, the driller can realize all drilling operation sitting in room, the working condition be improved
and the labor intensity be lightened greatly.
Satisfy the requirement for TDS installation.
Basic Parameter Of Varied Rigs
| Model, drilling rig | ZJ40DBS-L(J) | ZJ50DBS-L(J) |
| Nominal drilling depth, 127mm(5″)DP, m | 4000 | 5000 |
| Max. hook load, kN(t) | 2250 | 3150 |
| drill line number | 10 | 12 |
| Dia. of wireline, mm | 32 | 35 |
| Max. pull of fastline, kN | 280 | 350 |
| Drawworks | Model | JC-40DB | JC-50DB |
| Rated power, kW(hP) | 900(1200) | 1200(1600) |
| Gears | one gear,stepless speed regulating |
| Main brake | hydraulic disk brake＋ regeneration brake(dynamic brake) |
| Assistant brake |
| Crown block | TC-225 | TC-315 |
| Travelling block | YC-225 | YC-315 |
| OD of sheaves of hoisting system, mm(in) | 1120 | 1270 |
| Hook | DG225/DG250 | DG-315 |
| Swivel | Model | SL-225 | SL-450 |
| Dia. of stem bore | 75 | 75 |
| Rotary table | Opening dia. mm(in) | 698.5(27 1/2) | 952﹒5(37 1/2) |
| Gears | one gear,stepless speed regulating |
| Drive mode | VF motor |
| Derrick (mast) | Type | K | K |
| Height, m | 43 | 45 |
| Max. load, kN(lbs) | 2250 | 3150 |
| Substructure | Type | Box on box, or hydraulic lift vertically | swing-up |
| Drillfloor height | 7.5 | 9 |
| Clearance height under rotary beam, m | 6.3 | 7.68 |
| Mud pump | Model×number | F-1300×2 | F-1300×2 |
| Drive mode | Diesels and compound |
| Drive mode for rotary table | Independent drive with VF motor |
| Total power, kW | 3×810 | 3×810 |