Offshore drilling platform equipment
Technical Specifications – Offshore Skid Rig (Example: 5,000m Platform Rig)
Below is a representative configuration for a fixed or jack-up platform rig. Customize depth, BOP pressure, and automation level.
| Parameter | Specification |
|---|---|
| Rig model | ZJ50-OS (offshore skid version) |
| Nominal depth | 5,000 m |
| Hook load | 3,150 kN |
| Drawworks power | 1,500 HP AC VFD |
| Mast type | Cantilever, API 4F, 140 ft |
| Skid base | Hydraulic skid, 8m stroke, 500T capacity |
| Top drive | 500T AC, marine-rated, Ex d |
| Mud pumps | 2 x F-1600 triplex, 7,500 psi |
| Solids control | 3-shaker cascade + dryer + 400 bbl tank |
| BOP stack | 13-5/8″ 10K annular + dual ram, stainless trim |
| BOP control unit | Electric hydraulic, dual 500L accumulators |
| Generator sets | 3 x 1,800 kVA (Caterpillar), Ex d enclosure |
| Control cabin | Pressurized, Ex p, with marine HVAC |
| Corrosion protection | Norsok M-501 equivalent, stainless hardware |
| Certifications | API 4F, 7K, 8C, 16A; ABS class (optional) |
| Platform deck load | < 12 ton/m² (spread by skid beams) |
Product Types – Offshore Drilling Platform Equipment
| Product Category | Typical Models / Ratings | Key Offshore Feature |
|---|---|---|
| Platform skid rig | ZJ30OS – ZJ90OS | Hydraulic/mechanical skid, compact mast |
| Jack-up drilling rig | ZJ50JU, ZJ70JU | Cantilever with leg interface, increased storm rating |
| Offshore workover rig | XJ450OS | Lightweight, heli-transportable modules |
| Marine top drive | TD-350 to TD-750 | Ex d cooling fan, stainless body |
| Offshore BOP control unit | Accumulator skid, dual redundant | Fail-safe deadman, subsea umbilical ready |
| Platform mud system | Compact shaker & tank | Vertical cuttings dryer, low height profile |
| Driller’s offshore cabin | Ex p pressurized | Touchscreen, remote BOP control, wave display |
| Heave compensation system | Drawworks motion comp. | Active/passive, 0-5m stroke |
| Offshore spares kit | Custom for each rig | Marine-grade lubricants, extra seals, zinc anodes |
Applications – Where Our Equipment Operates
| Platform Type | Typical Water Depth | Equipment Supplied |
|---|---|---|
| Fixed jacket platform | 20 – 200m | Skid rig, platform mud system, BOP, camp module |
| Jack-up drilling rig | 50 – 150m | Full drilling package with cantilever skid |
| Semi-submersible | 300 – 3,000m | Heave-compensated rig, subsea BOP controls |
| Drillship | 500 – 3,600m | Dual-activity rig, motion comp, deepwater BOP |
| Tension-leg platform (TLP) | 500 – 1,500m | Workover skid, riser tensioners |
| FPSO topsides | 200 – 2,000m | Modular workover package, chemical injection |
Why Choose SJ Petro for Offshore Drilling Platform Equipment?
1. Decades of Marine Experience
We are not a land rig builder trying to go offshore. Our parent company Sinopec operates dozens of offshore platforms. We’ve learned the hard lessons – salt spray, condensation, cramped maintenance – and engineered them out.
2. Class Society Liaison Built-In
We prepare all documentation for ABS/DNV/Lloyd’s classification as part of our standard engineering. You don’t have to chase certificates from multiple vendors. One point of contact for class approval.
3. Compact Footprint Without Compromising Performance
Our skid rigs achieve land-rig horsepower in a platform-friendly layout. Mast folds hydraulically to clear cranes. Mud tanks snake around legs. We’ve done 5,000m rigs on platforms with only 25m x 18m deck space.
4. Full Ex Certification in-House
Our control cabinets, motors, lights, and sensors are designed and tested to ATEX / IECEx standards. You don’t need a separate explosion-proof retrofit. We also provide Zone 2 rated equipment for non-hazardous areas.
5. Fast Response to Offshore Emergencies
We maintain a 24/7 offshore support team. Critical spares stocked in regional hubs – Singapore (Asia), Dubai (Middle East), Houston (Americas). For urgent repairs, we can fly a technician to your platform within 10 days.
6. Retrofit & Upgrade Services
Do you have an older platform rig with outdated controls or dangerous electricals? We can retrofit our Ex d control system, add a top drive, or upgrade the BOP control unit – all while the rig is between wells.
7. Backed by Sinopec – Financially Stable
No worries about a small supplier going bankrupt mid-project. We are a state-backed subsidiary with full resources to honor warranties and long-term support.
FAQ – Offshore Drilling Platform Equipment
Q1: What is the difference between a "skid rig” and a standard land rig?
A: A skid rig has a reinforced substructure with low-friction skid shoes or wheels. It’s designed to be pushed sideways (by hydraulic jacks or platform cranes) between well slots without dismantling. Land rigs would need to be completely broken down for any lateral move.
Q2: How do you protect equipment from saltwater corrosion?
A: Three layers: 1) High-build epoxy coatings (minimum 300 microns DFT), 2) Stainless steel or galvanized fittings (no exposed mild steel), 3) Sacrificial zinc anodes on submerged parts. Our offshore warranty covers corrosion-related failure for 24 months.
Q3: Do your motors and panels have ATEX certificates?
A: Yes. We offer Ex d (flameproof) and Ex e (increased safety) ratings for Zone 1 and Zone 2. We can provide the full ATEX certificate pack. For ABS class, we add marine type approval.
Q4: Can you design a rig for a specific platform deck layout?
A: Absolutely. We need a deck plan, crane reach limits, and weight restrictions. Our engineers will model the rig in 3D to fit around existing structures (helideck, flare boom, living quarters). We’ve squeezed rigs into spaces as tight as 20m x 18m.
Q5: What is the typical lead time for an offshore skid rig (5,000m class)?
A: 180-240 days from order. This includes detailed engineering for platform integration, fabrication, marine coating, Ex certification, and class society witnessing. Expedited 150-day delivery possible for standard configurations.
Q6: Do you supply subsea BOP control systems?
A: We manufacture the surface control unit (accumulator skid, pumps, control panels) compatible with most subsea BOP stacks (Cameron, NOV, GE). For the subsea pod itself, we recommend partnering with a specialist – but we can integrate their system into our control architecture.
Q7: How do you test the rig before shipment?
A: We fully assemble the rig at our coastal yard (near Shanghai), connect all systems (including simulated BOP), run a full function test, and invite your class surveyor to witness. After disassembly, we marine-pack each module (shrink wrap + desiccant).
Q8: Can you supply spare parts for offshore rigs that are not your original equipment?
A: We do not copy other brands’ parts, but we can manufacture reverse-engineered components under strict quality control (material certs, full dimensions) for obsolete equipment. We also supply standard consumables – filters, belts, seals, zinc anodes – for any offshore rig.
