The Land SCR DC Drilling Rig ZJ50D is a heavy duty skid mounted SCR DC electric land drilling rig, developed for 3500-5000m deep well drilling and completion operations.
The Land SCR DC Drilling Rig ZJ50D is a heavy duty skid mounted SCR DC electric land drilling rig, developed for 3500-5000m deep well drilling and completion operations. Complying fully with API 4F, API 7K and ISO9001 international quality and safety standards, this rig adopts mature and reliable silicon controlled rectifier (SCR) DC drive technology. It features stable low speed high torque output, strong grid fluctuation resistance and high operational stability. With modular split skid structure, the whole unit supports standardized containerized multimodal transportation and rapid on site assembly. Widely applied in deep conventional oil gas, tight oil, shale gas and deep geothermal well projects, it is a cost effective and highly reliable core drilling device for medium and large scale domestic and overseas deep oilfield block development.
Equipped with classic SCR rectification DC speed regulation system. The drawworks and rotary table adopt independent DC motor drive, realizing stepless speed regulation and constant high torque output. Compared with traditional mechanical rigs, it delivers more stable drilling parameters, stronger load impact resistance and lower failure rate, adapting perfectly to complex deep formation drilling conditions.
Core components including derrick, heavy duty box substructure, main drawworks, SCR power cabinet and integrated control cabin are divided into independent standardized skid modules. The optimized external dimensions fully meet international container shipping standards, greatly reducing cross border logistics costs and improving rig up efficiency for overseas projects.
Adopts large K type open front derrick and upgraded heavy load box substructure. Verified by multi working condition finite element fatigue analysis, the overall structure maintains excellent rigidity and deformation resistance under long term maximum hook load cyclic operation, ensuring structural safety and stability during high intensity deep well drilling.
Features a fully sealed integrated driller cabin, integrating full process drilling data real time acquisition, stepless speed regulation control, multi layer electrical safety interlock, fault self diagnosis and data storage functions. Indoor centralized operation effectively reduces manual errors and improves overall drilling safety and intelligence level.
The whole machine is optimized for long cycle continuous operation, with fewer vulnerable parts and simple system logic. Key accessories adopt universal international oilfield standards, supporting rapid on site maintenance and convenient global after sales spare parts supply.
| Nominal Drilling Depth | 5000m (114mm drill pipe) |
|---|---|
| Maximum Static Hook Load | 3150kN |
| Main Drawworks Rated Power | 1100kW (1500HP) |
| Rotary Table Model | ZP495 |
| Drive Mode | SCR Silicon Controlled Rectifier DC Drive |
| Derrick Type | Heavy-duty K-type Open-front Derrick |
| Hoisting System Rope Lines | 6 x 7 / 12 lines |
| Drilling Wireline Diameter | 35mm |
| Working Ambient Temperature | -40C ~ +55C |
| Executive Standard | API 4F, API 7K, ISO9001 |
Deep onshore blocks brought online over the last two decades were, for the most part, developed with DC-electric fleets rather than the newest AC drives - and a large installed base of SCR-trained crews is still the practical reality on those leases. The ZJ50D is our heavy-duty 5000 m-class SCR DC land drilling rig, rated for 5000 m on 114 mm pipe, a 3150 kN static hook and a 1100 kW (1500 HP) drawworks over a ZP495 table. Its constant low-speed torque and stepless regulation suit deep conventional oil, tight oil, shale gas and deep geothermal work where string weight at total depth is the binding constraint; the sealed driller room centralises drilling data, electrical interlocks and fault diagnosis, and the split layout ships mast, substructure, SCR house and drawworks as modular loads.
A ZJ50D enquiry should open with the combined casing-plus-string weight you expect at total depth: the 3150 kN hook rating is generous, but matching the pump flow rate to the formation losses decides whether the well can actually reach that depth. State also your lowest design ambient temperature - the -40 C to +55 C range includes a cold-weather option - and your grid frequency (50 or 60 Hz), which sets the SCR transformer rating. If your target depth stays below 4000 m, the ZJ40D delivers the same DC drive philosophy at lower capital cost.
We keep a configuration record for every SCR DC land drilling rig we ship, so DC motors, cabinet modules and spare cards are traceable years after delivery - useful when a second unit must match the first. Wearing parts follow universal oilfield standards, with the commercial offer built around your power and string-weight assumptions.
Optional ultra low temperature anti brittle and cold start auxiliary system for frigid regions; desert high temperature heat insulation, dust and sand proof sealing upgrade for harsh arid oilfields.
Customizable 50Hz/60Hz grid voltage and frequency parameters, compatible with regional power system standards; optional full explosion proof electrical configuration for hazardous oil and gas working zones.
Precisely adjust skid module overall dimensions to meet international container transportation specifications, optimizing cross border logistics costs and installation efficiency.
Reserved mounting interfaces for top drive system, automatic pipe handling device, remote cloud monitoring and intelligent fault early warning system.
Support personalized equipment painting, customer brand logo spraying, and project exclusive complete spare parts package and full cycle after sales service.
Tell us your target depth, hook load and drive type; our engineers reply within 24 working hours.
Use the official contact information for model selection, specification discussion, and project inquiry.
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