Dual well drilling equipment
Technical Specifications – Dual Well Drilling Equipment
*The table below shows typical equipment specifications. All components are API 4F/7K certified.*
| Equipment Category | Model | Key Specs | Weight / Dimensions |
|---|---|---|---|
| Substructure (new dual) | SJ‑DWS‑500 | Two well centers, 5‑12m spacing, 500k lbs | 80,000 kg, 18×9×2m |
| Substructure (retrofit extension) | SJ‑DWE‑500 | Bolt‑on to existing substructure | 25,000 kg, 9×3×1.5m |
| Skidding system (sequential) | SJ‑SKS‑1000 | 4 gripper jacks, HPU 100 HP | 12,000 kg per set |
| Walking system (omni) | SJ‑WKS‑2000 | 8 legs, HPU 200 HP | 25,000 kg per set |
| Dual mast set (simultaneous) | SJ‑DMS‑700 | Primary 700k lbs, auxiliary 300k lbs | 80,000 kg total |
| Dual control cabin | SJ‑DCC‑2 | 2 HMI, 2 joystick sets | 3,000 kg, 3×2.5×2.5m |
| Pipe transfer arm | SJ‑PTA‑10 | 10 ft reach, 25,000 lbs capacity | 1,500 kg |
| Utility bridge | SJ‑UB‑20 | 20 m retracted, 60 m extended | 5,000 kg |
Applications
| Application | Equipment Configuration Needed |
|---|---|
| New land pad drilling (sequential) | New substructure + skidding system + single mast |
| Existing rig upgrade to sequential | Retrofit substructure extension + skidding system |
| Simultaneous drilling (land / offshore) | New dual substructure + dual mast set + dual control cabin + pipe transfer |
| Multi‑row pad (skid + walk combo) | Skidding system + walking system (for row changes) |
| Offshore platform slot drilling | Compact skidding system + marine coating + remote control |
| Workover pad campaigns | Light‑duty skidding (200k lbs substructure) |
Product Types – By Equipment Function
| Equipment Family | Purpose | Components Included |
|---|---|---|
| Substructure & foundations | Support dual well centers | Main substructure, extension kit, well head adapters |
| Movement systems | Move rig between wells | Skid beams, gripper jacks, walking legs, HPU, controls |
| Masts & top drives | Drilling on two centers | Primary mast, auxiliary mast, top drives, elevators |
| Controls & cabins | Operate dual rig | Centralized cabin, PLC, HMI, CCTV, e‑stops |
| Pipe & utility transfer | Move pipe/utilities between centers | Transfer arm, utility bridge, hose/cable trays |
| Retrofit kits | Upgrade single rigs | Extension beam, skid mount kit, control interface |
We also supply complete integrated dual well rigs – all components pre‑engineered and factory tested. Lead time: 12‑18 months.
Why Choose SJ Petro for Dual Well Drilling Equipment?
1. Field‑Proven Hardware – Our dual well substructures, skidding systems, and mast sets have been deployed on over 50 rigs across China, Middle East, and Americas.
2. API 4F / 7K Certified – Every structural component, hoisting device, and control system meets API standards. Full traceability.
3. Retrofit Expertise – We have upgraded over 20 existing single‑well rigs to dual well capability. Our bolt‑on extension kits require minimal welding and no new rig purchase.
4. Fast Installation – New substructure installation: 10‑14 days. Retrofit extension: 5‑7 days. Skidding system add‑on: 3‑5 days.
5. Interchangeable Components – Skidding jacks, control modules, and utility bridges are common across our product line – reduces spares inventory.
6. Global Support – Spare parts for hydraulic cylinders, control valves, and wear plates stocked in Houston, Dubai, and Singapore.
7. Custom Engineering – Non‑standard well spacing (e.g., 3 meters, 15 meters), special materials (NACE), and extreme climate packages available.
8. Sinopec Backing – Our dual well equipment has been refined through thousands of pad drilling jobs in Sinopec’s own fleet. Not a prototype – a production‑proven system.
Frequently Asked Questions (FAQ)
Q1: What is the difference between dual well drilling "equipment” and a "dual well rig”?
A dual well rig is the complete drilling machine – mast, drawworks, top drive, etc. Dual well equipment refers to the components that enable two‑well operation: the substructure with two well centers, the skidding/walking system, the dual control cabin, and the pipe transfer system. You can add this equipment to an existing single rig to make it a dual well rig.
Q2: Can I retrofit my existing single‑well rig to become a dual well rig?
Yes – with our substructure extension kit and skidding system. You do not need to replace the entire rig. We bolt on a second well center section and add the movement hardware. Total cost is typically 30‑40% of a new dual rig.
Q3: Do I need a dual mast for simultaneous drilling?
Yes – if you want to drill two wells at the same time (true simultaneous), you need two complete masts, top drives, and drawworks. If you only want sequential drilling (one mast skidding between wells), a single mast is sufficient.
Q4: What is the minimum well spacing your substructure can handle?
Standard spacing: 5 meters (16 ft) for simultaneous dual masts; 3 meters (10 ft) for sequential skidding. We can custom design down to 2.5 meters (8 ft) with narrower masts.
Q5: How long does it take to move the rig between wells with your skidding system?
Skidding (sequential): 20‑60 minutes for typical 5‑10 meter spacing. Walking: 45‑120 minutes. Compare to 2‑5 days for conventional rig‑down and truck move.
Q6: Does your dual well equipment require a larger crew?
No – a sequential dual rig uses the same crew as a single rig (6‑8). A simultaneous dual rig typically uses 8‑10 (about 1.5× a single rig) but drills 2× the wells in the same time – far lower crew cost per well.
Q7: Can the equipment handle drilling in arctic or desert conditions?
Yes – arctic package includes heated substructure, low‑temp hydraulic fluid, and insulated control cabin (‑40°C). Desert package includes oversized coolers, sand filters, and UV‑resistant hoses (55°C).
Q8: What is the typical lead time for dual well equipment?
New substructure + skidding: 6‑8 months. Retrofit extension + skidding: 4‑5 months. Dual mast set: 10‑12 months. Full simultaneous dual rig (new): 12‑18 months.
Q9: Do you provide installation and training?
Yes – our field service team supervises installation (1‑2 weeks) and provides 1‑2 weeks of on‑site training for your crew and maintenance staff.
Q10: What API certifications do your components carry?
Substructures: API 4F. Skidding/walking cylinders and controls: API 7K (pumps) and 4F (structural). Dual control cabin: rated for hazardous area (Class I, Div 2).
Q11: Can you design a custom well center spacing for an existing pad?
Yes – we send a survey team to measure your pad layout and existing rig footprint. We then design the substructure extension and skid beams to match your exact well spacing.
Q12: How do I get a quote for dual well drilling equipment?
Provide: current rig specifications (weight, mast type, substructure dimensions), desired operation (sequential or simultaneous), well spacing, and pad layout. We will respond with an equipment list and fixed price within 7 business days.
