The Land SCR DC Drilling Rig ZJ40D is a skid mounted land based SCR DC electric drilling rig, specially designed for 3000-4000 m medium deep well drilling and completion operations.
The Land SCR DC Drilling Rig ZJ40D is a skid mounted land based SCR DC electric drilling rig, specially designed for 3000-4000 m medium deep well drilling and completion operations. Manufactured in compliance with API 4F, API 7K and ISO9001 international standards, the rig adopts classic SCR silicon controlled rectifier DC drive technology, featuring stable power output, high torque reserve and strong anti interference capability. With modular skid split structure, it supports containerized sea land multimodal transportation and standardized on site assembly. This model is widely applicable for conventional oil and gas, coalbed methane, tight gas and medium deep geothermal well drilling, and is highly favored for overseas medium deep oilfield development projects with mature and reliable DC electric drive technology.
Adopts SCR rectification DC speed regulation technology. The drawworks and rotary table are driven by DC motors, delivering constant high torque at low speed and stepless speed regulation. It features strong load adaptability, stable drilling parameter output and outstanding resistance to grid voltage fluctuation, perfectly fitting complex medium deep formation drilling conditions.
Derrick, box type substructure, main drawworks, SCR power cabinet and integrated control cabin are arranged in independent skid modules. The split size matches international container transportation standards, greatly reducing cross border logistics costs and shortening on site rigging up cycle.
Equipped with reliable K type open front derrick and heavy duty box substructure. Verified by finite element mechanical analysis, the whole bearing structure maintains excellent rigidity and stability under long term cyclic load operation, effectively avoiding structural fatigue deformation during continuous medium deep well drilling.
Adopts centralized driller control room with unified electric, hydraulic and pneumatic control logic. It realizes full process drilling parameter monitoring, logic interlock protection, data storage and remote transmission, improving operation accuracy and field safety management level.
Classic DC drive structure with fewer vulnerable parts and lower failure rate compared with traditional mechanical rigs. Standardized international general accessories and simple system architecture facilitate daily maintenance and global after sales support.
| Nominal Drilling Depth | 4000m (114mm drill pipe) |
|---|---|
| Maximum Static Hook Load | 2250kN |
| Main Drawworks Rated Power | 800kW |
| Rotary Table Model | ZP375 |
| Drive Mode | SCR Silicon Controlled Rectifier DC Drive |
| Derrick Type | K type Open front Derrick |
| Working Ambient Temperature | -35C ~ +55C |
| Executive Standard | API 4F, API 7K, ISO9001 |
When a project calls for electric drive but the local grid is unreliable, SCR silicon-controlled-rectifier DC technology has spent decades proving itself as the steady middle ground between all-mechanical rigs and full AC VFD fleets. The ZJ40D is our 4000 m-class SCR DC drilling rig: 4000 m nominal depth on 114 mm pipe, a 2250 kN static hook, an 800 kW drawworks and a ZP375 rotary table, with the drawworks and table turned by independent DC motors under stepless speed regulation. That low-speed high-torque reserve, combined with strong resistance to grid voltage fluctuation, is why overseas medium-deep turnkey projects still specify SCR DC for conventional oil and gas, CBM and tight gas cluster wells. The split layout - mast, substructure, drawworks, SCR cabinet and PLC control room - moves as container-compatible loads.
With an SCR unit the inquiry starts with the power supply, not the mast: tell us the site grid frequency (50 or 60 Hz), the available transformer capacity, and how much voltage fluctuation you expect at the pad. The ZP375 table, the driller control room with PLC interlocks and data logging, and the -35 C to +55 C envelope are standard, all certified to API 4F / 7K / ISO 9001. If your crews are already trained on DC drives the transition cost is minimal; if you would rather avoid SCR cabinet maintenance, the AC VFD ZJ40-class unit is the alternative at a similar 4000 m envelope.
This SCR DC drilling rig can be supplied with a full operator training package at your site or at our Jingzhou factory, covering the DC speed-regulation logic and PLC interlocks before commissioning. Pricing is configured around the SCR cabinet rating, the pump and solids-control skids and the electrical standard, and the offer is returned once those parameters are locked.
Optional low temperature anti brittle modification package for cold regions, and dust proof, heat insulating and sand proof upgrade for desert oilfields to ensure stable operation in extreme climates.
Support 50Hz/60Hz voltage conversion and regional power system adaptation; optional explosion proof electrical configuration for hazardous working zones.
Adjust module overall dimensions to meet international container shipping limits, optimizing overseas transportation and on site assembly efficiency.
Reserved installation interfaces for top drive system, automatic pipe handling device and remote data monitoring platform to upgrade intelligent operation level.
Support custom equipment painting color, customer brand logo spraying and project specific full set of spare parts package delivery.
Related guides: AC VFD vs SCR DC vs mechanical drive comparison and after-sales support and spare parts.
Tell us your target depth, hook load and drive type; our engineers reply within 24 working hours.
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