The Land SCR DC Drilling Rig ZJ70D is a heavy-duty skid-mounted SCR DC electric drilling rig, professionally designed for 5000-7000m ultra-deep well drilling, completion and reservoir reconstruction operations.
The Land SCR DC Drilling Rig ZJ70D is a heavy-duty skid-mounted SCR DC electric drilling rig, professionally designed for 5000-7000m ultra-deep well drilling, completion and reservoir reconstruction operations. Fully compliant with API-4F, API-7K and ISO9001 international industry standards, the rig adopts mature and reliable SCR silicon controlled rectifier DC drive technology, featuring stable low-speed high-torque output, strong load impact resistance and excellent operational stability. With a full modular split skid structure, all core units adapt to standard containerized sea-land multimodal transportation and rapid on-site assembly. This model is widely used for ultra-deep conventional oil and gas, deep tight oil, shale gas and large-scale geothermal resource development, serving as a high-cost-performance and ultra-reliable core equipment for global ultra-deep oilfield block construction and turnkey projects.
Equipped with upgraded high-power SCR rectification DC speed regulation system. The main drawworks and rotary table adopt independent DC motor drive, realizing stepless speed regulation and constant high-torque output. The system boasts simple and stable logic, strong anti-grid-interference ability, and can maintain continuous and stable operation under complex variable load conditions of ultra-deep formations, effectively reducing drilling failure risks.
Core components including super-large K-type derrick, heavy-duty box substructure, high-power drawworks, SCR power distribution cabinet and sealed control cabin are designed as independent skid modules. The optimized overall dimensions fully meet international container transportation standards, greatly lowering overseas logistics costs and shortening on-site rig-up and commissioning cycle.
Adopts reinforced heavy-duty K-type open-front derrick and thickened box-type substructure. Verified by full-working-condition finite element fatigue simulation and mechanical stress tests, the overall structure features ultra-high rigidity and deformation resistance, adapting to long-term high-load cyclic operation of 7000m ultra-deep wells without structural fatigue damage.
Configured with fully sealed dust-proof and heat-insulated driller control cabin, integrating full-process drilling data real-time acquisition, precise speed and tension control, multi-level electrical and mechanical safety interlock, and intelligent fault self-diagnosis functions. Indoor integrated operation minimizes manual errors and significantly improves ultra-deep well drilling safety and operational efficiency.
The classic SCR DC system has fewer vulnerable parts and lower failure rate compared with modern variable frequency systems, with more mature global after-sales support. Key wearing parts adopt universal international oilfield specifications, supporting rapid on-site maintenance and spare parts replacement in various complex oilfield environments worldwide.
| Nominal Drilling Depth | 7000m (114mm drill pipe) |
|---|---|
| Maximum Static Hook Load | 4500kN |
| Main Drawworks Rated Power | 1400kW (1900HP) |
| 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 | 38mm |
| Working Ambient Temperature | -40C ~ +55C |
| Executive Standard | API 4F, API 7K, ISO9001 |
The ZJ70D SCR DC drilling rig is the same 7000 m depth class as its AC VFD sibling, but it is built for operators who prioritise proven, field-hardened drive technology. With a 4500 kN static hook load, 1400 kW (1900 HP) drawworks and a 6 x 7 / 12-line hoisting system on 38 mm wireline, the silicon-controlled rectifier DC drive gives stable low-speed high-torque output that shrugs off impact loads in harsh formations. If your maintenance crew is already fluent in SCR DC systems, or your region's spare-parts market is built around them, the ZJ70D keeps your rig-up and service costs predictable — that is the real reason buyers request a ZJ70D drilling rig quotation over newer AC platforms.
When you ask for a land drilling rig supplier quotation on the ZJ70D, give us the expected load cycles and hoisting profile, not just the target depth: the 12-line configuration and 38 mm wireline change the block speed and service intervals. Also state your power-source situation — SCR DC can be paired with your existing diesel-electric plant, which changes the project economics. The modular skid split structure and containerised transport layout apply exactly as on the AC VFD version, so overseas shipping and site assembly follow the same fast-track schedule.
ZJ70D pricing is quoted per configuration after an engineering review of your well programme and power plant; a benchmark figure is usually back to you within two working days of receiving the well data and site electrical details.
Optional ultra-low temperature cold-resistant and anti-brittle modification package with hydraulic and electrical cold-start assist system; desert high-temperature heat insulation and full dust sealing upgrade; coastal salt spray heavy-duty anti-corrosion coating treatment for harsh working scenarios.
Customizable 50Hz/60Hz voltage and frequency parameters to match different national grid standards; GOST-compliant electrical system for Central Asian and Russian markets; full explosion-proof electrical configuration for hazardous oil and gas zones.
Precisely adjust skid module dimensions to comply with international container shipping limits, optimizing cross-border logistics efficiency and adapting to limited-space ultra-deep well pads.
Reserved mounting interfaces for top drive system, automatic pipe handling device, cloud remote real-time monitoring and big data fault early warning system to enhance intelligent drilling capability.
Support personalized equipment color spraying, customer brand logo customization, project-exclusive complete spare parts package and full-cycle after-sales technical support.
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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