The ZJ70DB is the standard ultra-deep rig of the skid line, rated 4500–7000m on 114mm pipe (4000–6000m on 127mm) with a 4500kN maximum hook load on a 6×7 string reeved with φ38mm line. It sits one notch below the ZJ80 flagship: three 1200kW gensets rather than five, a 1470kW (2000hp) drawworks rather than 2210kW, and two 1600hp mud pumps rather than three. This fixed skid mounted rig keeps the AC-VFD-AC drive, 45.5m K-type mast and 10.5m substructure over a φ952.5mm (37.5”) rotary table carry the 7000m program and the deep workover that follows it, in a fixed-station spread built to stay on location for years.
The 4500kN maximum hook load is carried on a 6×7 traveling system with φ38mm drill line. That is the hoisting envelope for the 7000m rating — large enough for long-string trips and heavy workover pulls, but a step below the 6750kN / 7×8 arrangement on the larger ZJ80.
Three 1200kW diesel gensets feed the AC-VFD-AC bus driving the 1470kW (2000hp) drawworks. The VFD gives stepless speed control to the drawworks and a 1-or-2-shift stepless rotary, with generator capacity matched to the 7000m duty rather than over-sized for the flagship program.
Circulation is served by two 1600hp mud pumps through a Φ102mm / 35MPa manifold, feeding ≥360m³ of effective mud volume. It is a two-pump plant, one running and one on stand-by or staged, rather than the three-pump arrangement on the ZJ80.
A 45.5m K-type derrick stands on a 10.5m-high substructure. The raised floor leaves the clearance needed for the BOP stack and high-pressure control lines on an ultra-deep well, and the φ952.5mm (37.5”) rotary table handles the deep-well casing strings.
The rig is specified when the target depth tops out near 7000m and the operator wants a permanent station rather than a mobile spread. The fixed skid, VFD drive and two-pump mud plant are sized for that envelope without the extra generator and pump capacity the 8000–9000m strategic rig requires.
The same 4500kN hoist that drills the well also works it over: the 6×7 string, φ38 line and 45.5m mast handle completion runs, deep repairs and fish recovery at well depths beyond the reach of the 5000m-class rigs, so one spread covers both the drilling and the long-term workover cycle.
| Product | 2000HP Skid Mounted Rig (ZJ70DB) |
|---|---|
| Product line | Drilling Rigs |
| Nominal drill depth (114mm DP) | 4500~7000m | Open diameter of rotary table | φ952.5mm (37.5” ) |
| (127mm DP) | 4000~6000m | Qty.× power of diesel engine | 3×1200kW |
| Max. hook load | 4500kN | Drawworks gear shift | Step less speed regulation |
| Traveling system structure | 6×7 | Substructure height | 10.5m |
| Drill line diameter | φ38mm | Mast type and height | K type, 45.5m |
| Qty.× power of mud pump | 2×1600hp | Drawworks power | 1470kW (2000hp) |
| Drive type | AC-VFD-AC | mud high pressure manifold | Φ102mm (diameter)×35MPa |
| Rotary table shift quantity | 1 1shift or 2 shift Step less speed regulation | effective capacity of mud tank of solid control system | ≥360m3 |
For a useful technical response, include the target well conditions, operating depth or pressure, expected quantity, destination and any required configuration.
Send an InquiryAvailable configurations can be matched to the equipment model, operating conditions and project requirements.
The 2000HP ZJ70DB questions that matter most are the 4,500-7,000 m drilling range and the 1470 kW drawworks rating.
The ZJ70DB steps the skid line from the 1500HP class: hook rating rises to 4500 kN on a 6×7 string with φ38 mm line, drawworks power to 1470 kW (2000 hp), and the circulating side to two 1600 hp mud pumps under a 45.5 m K-type mast and 10.5 m substructure. Nominal drilling depth moves to 4500–7000 m on 114 mm pipe, or 4000–6000 m on 127 mm pipe, with the AC-VFD-AC drive retained. The practical gain is depth plus circulating capacity: a 7000 m program that the smaller rig carries at the edge of its envelope becomes standard duty here.
The heavy modules are pre-assembled at the factory, with the 1470kW drawworks run under load and the two 1600hp pumps pressure-tested before shipment. Site deployment is foundation preparation, mating the skid sections, and connecting the VFD/MCC cabins and the ≥360m³ mud pits. Because the module tests are already done, the crew mates the spread rather than assembling it from scratch.
The hoist does two jobs on one envelope. Drilling duty covers 4500–7000m on 114mm pipe; workover duty uses the 4500kN hook, 6×7 string and 45.5m mast for completion tubing, deep repairs and stuck-pipe recovery on the same well after it has produced. That dual use is the case for a fixed skid rather than a truck rig, which cannot stay on location through the workover cycle.
Climate tolerance comes from the drive package: the VFD and MCC cabins are sealed and temperature-controlled, the three 1200kW gensets are fitted for cold starting and dust, and the ≥360m³ mud plant supports heated tanks so circulation holds up in freezing conditions. In high-heat desert service, the radiator and ventilation sizing is set for continuous full-load running.
Each unit is delivered with installation drawings, the VFD and drawworks manuals, and the factory test report for the 4500kN hoist and the mud-plant hydrotest, together with a first-period spare list. Remote technical support is free of charge. For large ultra-deep projects, our engineering staff can attend site to supervise commissioning and train the operating crew.
Commercial terms are confirmed in the quotation for the exact configuration, quantity and destination.
Manufactured to API 4F and API 7K for deep exploration, reservoir secondary development and large geothermal projects; confirm the applicable standards and certificates in the inquiry.
Drilling manuals, rig inspection reports and load-test certificates are supplied; the skid dimensions and manifold drawings are provided for site integration. Rig-up supervision is available.
Confirmed in the quotation according to configuration, quantity and destination.
Manuals, conventional spare parts and remote technical guidance are included; on-site commissioning and operator training can be arranged on request.
Payment schedule, Incoterms, port and packaging are agreed in the sales contract.
A recommended spare-parts list for the first operating period is provided with the quotation.
Explore nearby products to compare equipment scope before sending an inquiry.
The ZJ40D is the 4000m-class workhorse of the skid range, rated 2500–4000m on 114mm drill pipe (2000–3200m on 127mm pipe) with a 2250kN maximum hook load reeved 5×6 over φ32mm line.
The ZJ50D takes the skid line into the 5000m class, rated 3500–5000m on 114mm pipe (2800–4500m on 127mm) with a 3150kN maximum hook load.
The ZJ80 is a fixed-station rig sized by its depth envelope: 6000–9000m nominal drilling with 114mm drill pipe, or 5000–8000m with 127mm pipe, on a 6750kN hook rating strung 7×8 with Φ42mm drill line under a 48m K-type…
