Land AC VFD Drilling Rig ZJ70DB LS

The Land AC VFD Drilling Rig ZJ70DB LS is a high-end 7000-meter-class ultra-deep full AC variable frequency drive land drilling rig, manufactured in.

Product overview

The Land AC VFD Drilling Rig ZJ70DB LS is a high-end 7000-meter-class ultra-deep full AC variable frequency drive land drilling rig, manufactured in strict accordance with API 4F, API 7K and ISO9001 international industry standards. Developed specifically for 5000-7000m ultra-deep well drilling, high-pressure complex formation completion and heavy-duty overhaul operations, this LS upgraded lightweight version adopts full AC-VFD electric drive technology, completely abandoning traditional mechanical transmission limitations. It features ultra-high torque output, precise digital speed regulation, stable variable-load adaptability and low energy consumption. With optimized lightweight modular skid layout and high-rigidity reinforced bearing structure, the rig balances ultra-deep heavy-load drilling capacity and global transportation flexibility. It is the core intelligent drilling equipment for ultra-deep conventional oil and gas, shale gas, tight oil, deep geothermal and national strategic deep energy exploration projects, widely used in high-standard domestic and overseas ultra-deep well EPC turnkey projects.

Nominal Drilling Depth (114mm Drill Pipe)7000m
Nominal Drilling Depth (127mm Drill Pipe)6000m
Maximum Static Hook Load4500kN
Main Drawworks Rated Power1470kW (2000HP)

Core innovative advantages and structural features

Full AC-VFD High-precision Variable Frequency Drive System

Equipped with industrial high-power full AC variable frequency drive unit, realizing full-process stepless speed regulation and intelligent torque adaptive adjustment. It provides stable ultra-high low-speed torque, effectively overcoming complex formation problems such as hard stratums, high friction and easy sticking during ultra-deep well drilling. The electric drive features zero mechanical transmission loss, low vibration and low noise, greatly improving drilling efficiency and operation stability compared with traditional mechanical and compound drive rigs.

LS Lightweight Optimized Modular Design

On the premise of maintaining 7000m ultra-deep heavy-load performance, the whole machine undergoes lightweight structural optimization and modular integration upgrading. Derrick, substructure, VFD power cabinet group and control cabin are reasonably decomposed into standard container modules, fully complying with international shipping and road transportation specifications. It effectively reduces overall transportation weight and volume, lowers cross-border logistics costs, and realizes rapid on-site assembly and commissioning.

Ultra-high Rigidity Heavy-duty Bearing Structure

Adopts upgraded thickened high-strength alloy K-type open-front derrick and high-load box-type substructure. After finite element full-working-condition stress analysis and fatigue verification, the bearing system has excellent wind resistance, deformation resistance and structural stability. It can withstand long-term continuous heavy-load operation of 7000m ultra-deep wells, fully adapting to severe working conditions of high well pressure and complex stratums.

Intelligent Digital Integrated Control System

Equipped with fully sealed dust-proof and heat-insulated intelligent driller cabin, integrating full drilling parameter real-time monitoring, automatic load balancing, multi-level safety interlock protection and intelligent fault self-diagnosis functions. It supports high-precision digital one-key operation, reduces manual operation errors, and can be expanded with remote cloud data transmission and intelligent drilling management system to realize unmanned auxiliary drilling operation.

Energy-saving, Environmental Protection & Low Comprehensive Cost

Full electric drive achieves zero on-site exhaust emissions, meeting international high-standard environmental protection requirements. The simplified transmission structure reduces a large number of mechanical vulnerable parts and failure rates. The intelligent energy-saving control mode automatically adjusts power output according to drilling load, effectively reducing long-term power consumption and operation and maintenance costs.

Full-range Complex Environment Adaptability

All load-bearing steel components adopt multi-layer heavy-duty anti-corrosion and weather-resistant treatment; core electrical and frequency conversion components are equipped with dust-proof, sand-proof, moisture-proof and wide-temperature protection modules. The whole machine can operate stably in alpine low-temperature, desert high-temperature, windy and dusty, and high-altitude complex areas, with strong global environmental adaptability.

Technical specifications

Nominal Drilling Depth (114mm Drill Pipe)7000m
Nominal Drilling Depth (127mm Drill Pipe)6000m
Maximum Static Hook Load4500kN
Main Drawworks Rated Power1470kW (2000HP)
Rotary Table ModelZP495
Hoisting System Rope Lines7 x 8 / 14 lines
Drilling Wireline Diameter38mm
Drive ModeFull AC-VFD Variable Frequency Electric Drive
Derrick TypeUltra-heavy K-type Open-front Lightweight Derrick
Standpipe Working Pressure52MPa
Working Ambient Temperature-35C ~ +55C
Executive StandardAPI 4F, API 7K, ISO9001

Application fields

  • Ultra-deep onshore conventional oil and gas well drilling and completion engineering
  • Deep shale gas, tight oil and ultra-deep unconventional energy resource exploration and development
  • Ultra-deep geothermal resource development, deep thermal well construction and strategic energy supporting projects
  • Ultra-deep industrial water wells, mine emergency deep water wells and major national water source projects
  • Ultra-deep oilfield heavy-duty workover, high-pressure complex downhole accident treatment and old well reconstruction
  • High-end ultra-deep well strategic development and international high-standard intelligent drilling EPC turnkey projects

OEM and customized solution

Extreme Environment Customization

Optional ultra-low temperature cold-start and anti-brittle modification package for high-latitude alpine regions; enhanced full-system dust and sand prevention and heat insulation system for desert ultra-high temperature working conditions; heavy-duty multi-layer anti-corrosion coating for coastal and high-humidity areas.

VFD System High-performance Upgrade

Customize frequency conversion program parameter calibration, low-speed high-torque amplification and grid anti-interference optimization to adapt to ultra-deep high-pressure hard formation drilling and unstable power grid conditions.

Lightweight Structure Fine Tuning

Optimize module weight and size distribution according to customer site conditions and logistics standards to further improve transportation and on-site installation efficiency.

Full Intelligent Drilling Upgrade

Support matching top drive system, full-automatic pipe handling system, remote intelligent monitoring platform and drilling data cloud management system to realize fully automated intelligent drilling operation.

Professional Turnkey Service

Provide customized equipment color painting, exclusive brand logo marking, ultra-deep well dedicated spare parts package and full-cycle 24-hour professional after-sales technical support.

Contact and inquiry

Use the official contact information for model selection, specification discussion, and project inquiry.

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