Offshore Equipment
Technical Specifications – Offshore Equipment Range
The tables below present key specifications for our most requested offshore equipment product lines. All specifications comply with API standards.
Ram BOP (API 16A)
| Parameter | BOP‑7‑5K | BOP‑11‑10K | BOP‑13‑15K | BOP‑18‑15K |
|---|---|---|---|---|
| Nominal bore (inches) | 7‑1/16" | 11" | 13‑5/8" | 18‑3/4" |
| Working pressure (PSI) | 5,000 | 10,000 | 15,000 | 15,000 |
| Ram type | Single / dual | Dual / triple | Triple | Dual + shear |
| Pipe ram sizes | 2‑3/8" to 5‑1/2" | 2‑7/8" to 7‑5/8" | 3‑1/2" to 9‑5/8" | 5‑1/2" to 13‑3/8" |
| Shear ram option | No | Blind/shear | Blind/shear + casing | Blind/shear + casing |
| Material class | DD, EE | EE, FF | FF, HH | HH |
| Temperature class | P (-29°C to +82°C) | U (-46°C to +121°C) | U (-46°C to +121°C) | U (-46°C to +121°C) |
| Approx. weight (tons) | 3.1 | 8.4 | 13.2 | 21.0 |
Annular BOP (API 16A)
| Parameter | A‑7‑5K | A‑11‑10K | A‑13‑10K | A‑18‑5K | A‑21‑10K |
|---|---|---|---|---|---|
| Bore (inches) | 7‑1/16" | 11" | 13‑5/8" | 18‑3/4" | 21‑1/4" |
| Working pressure (PSI) | 5,000 | 10,000 | 10,000 | 5,000 | 10,000 |
| Rubber packer type | Universal | High‑temp | Universal | Universal | High‑temp |
| Closing volume (gallons) | 8 | 22 | 32 | 55 | 85 |
| Height (inches) | 24" | 36" | 44" | 58" | 72" |
| Weight (tons) | 1.0 | 2.9 | 4.4 | 8.2 | 14.5 |
Wellhead & Christmas Tree (API 6A / 17D)
| Parameter | WT‑7‑5K | WT‑11‑10K | WT‑13‑15K | SST‑7‑10K (Subsea) |
|---|---|---|---|---|
| Casing head size | 7‑1/16" | 11" | 13‑5/8" | 18‑3/4" |
| Working pressure (PSI) | 5,000 | 10,000 | 15,000 | 10,000 |
| Material class | DD, EE | EE, FF | FF, HH | HH |
| PSL (Product Spec Level) | PSL 2 | PSL 3 | PSL 3G | PSL 3G |
| Tree type | Single bore (2‑1/16") | Dual bore (2‑1/16" + 3‑1/8") | Dual bore | Vertical monobore |
| Actuation | Manual / hydraulic | Hydraulic | Hydraulic + ROV | ROV / electro‑hydraulic |
| Depth rating (water) | — | — | — | 3,000 m |
BOP Control Unit (API 16D)
| Parameter | HCU‑20 | HCU‑40 | HCU‑80 | HCU‑150 |
|---|---|---|---|---|
| Accumulator capacity (gallons) | 20 | 40 | 80 | 150 |
| Usable fluid volume (gallons) | 9 | 18 | 36 | 68 |
| Max pressure (PSI) | 3,000 | 3,000 | 5,000 | 5,000 |
| Pump type | Electric (5 HP) | Electric (10 HP) | Diesel or electric | Diesel or electric |
| Redundancy | Single pump | Dual pump (auto‑failover) | Dual pump + dual accumulators | Triple pump |
| Control panel | Manual lever | Solenoid + manual | Fully electronic (MUX) | MUX + acoustic backup |
| ATEX rating | Zone 2 | Zone 1/2 | Zone 1 | Zone 1 |
| Footprint (L×W×H, m) | 1.2 × 0.9 × 1.5 | 1.8 × 1.2 × 1.8 | 2.4 × 1.8 × 2.1 | 3.0 × 2.4 × 2.4 |
Hydraulic Workover Unit (Offshore)
| Parameter | WOU‑30 | WOU‑50 | WOU‑100 | WOU‑150 |
|---|---|---|---|---|
| Hook load capacity (tons) | 30 | 50 | 100 | 150 |
| Snubbing capacity (lbs) | — | 15,000 @ 5K PSI | 30,000 @ 10K PSI | 50,000 @ 15K PSI |
| Mast type | Single telescoping | Two‑section folding | Three‑section folding | Four‑section folding |
| Mast extended height | 25 ft | 35 ft | 45 ft | 55 ft |
| Number of skids | 2 | 3 | 4 | 5 |
| Heaviest skid weight (tons) | 6 | 8 | 12 | 15 |
| Heave compensation | No | Passive | Active | Active |
Product Types – Offshore Equipment Portfolio
We manufacture and supply the full spectrum of offshore equipment:
Drilling Equipment
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Offshore platform drilling rigs — Fixed platform rigs (1,000‑4,000 HP) with AC VFD drawworks, top drive, and integrated solids control.
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Jackup drilling packages — Cantilever rig packages designed for jackup installation. Mast heights up to 180 ft.
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Top drives — 150‑1,200 ton capacity. Dual motor, torque turn recording, ATEX certified.
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Mud pumps — F series triplex pumps, 800‑2,200 HP. Fluid ends interchangeable with major brands. Seawater‑cooled options available.
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Solids control systems — 4‑5 stage: shale shakers, degassers, desanders, desilters, centrifuges. Marine‑grade coatings.
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BOP control systems (API 16D) — Subsea MUX systems, surface control panels, accumulator skids, diverter controls.
Production & Wellhead Equipment
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Wellheads (API 6A) — Casing heads, tubing heads, spools, hangers (slip and mandrel). Working pressure 3K‑15K PSI.
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Christmas trees (API 6A/17D) — Single bore, dual bore, and mudline trees. Manual, hydraulic, or ROV actuation.
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FRAC trees — 10K‑15K PSI. Erosion‑resistant trim. Up to six gate valves.
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Gate valves (slab & expanding) — 1‑13/16" to 7‑1/16". Manual, bevel gear, or hydraulic actuation.
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Plug valves — Non‑lubricated, pressure‑balanced. Quarter‑turn operation.
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Adjustable chokes — Positive or needle/seat. Manual, electric, or hydraulic remote control.
Workover & Intervention Equipment
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Hydraulic workover units — 30‑150 ton hook load. Integrated snubbing capability. Skid‑mounted for platform crane installation.
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Heave‑compensated lift frames — For semi‑submersibles and drillships. Active or passive compensation, 5 meter stroke.
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Wireline pressure control equipment — Lubricators, stuffing boxes, wireline BOPs.
Subsea Equipment
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Subsea tree components — Vertical monobore trees, connectors, controls.
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Subsea control modules — Electro‑hydraulic multiplex modules with ROV hot stabs.
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Subsea connectors — Collet and flange connectors, depth rated to 4,000 m.
Hydraulic & Control Systems
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API 16D BOP control units — Accumulator skids with electric, diesel, or air driven pumps.
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Platform hydraulic power units — For tree actuation, valve control, and crane power.
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Remote monitoring & control panels — Digital interfaces with data logging and satellite uplink.
Applications – Where Our Offshore Equipment Is Deployed
Our offshore equipment is installed and operating in:
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Fixed jacket platforms — South China Sea, Middle East Gulf. Complete drilling packages, wellhead trees, and hydraulic control systems for shallow to medium water depths (50‑300 m).
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Jackup drilling rigs — Southeast Asia, Middle East. Cantilever rig packages with high‑load capacity masts and BOP stacks rated to 15,000 PSI.
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Semi‑submersibles — Deepwater frontier basins. Heave‑compensated workover units, subsea BOP control systems (MUX with acoustic backup), and depth‑rated subsea trees.
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Drillships — Ultra‑deepwater (2,000‑3,500 m). Our subsea equipment is hyperbaric tested to 4,000 m water depth. Redundant control pods for BOP actuation.
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FPSO topsides — West Africa, Southeast Asia, Brazil. Compact hydraulic power units, FRAC trees for high‑rate fracturing, and remote control stations.
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Platform well intervention — Routine pump changes, tubing repair, packer retrieval. Our hydraulic workover units are skid‑mounted for platform crane installation.
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Subsea tieback projects — Subsea trees and manifolds for long‑distance tiebacks to host platforms.
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Offshore decommissioning & abandonment — Cut‑and‑pull workover units, BOP stacks for temporary well control, and wellhead removal tooling.
Why Choose SJ Petro for Offshore Equipment?
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Sinopec‑backed manufacturing & engineering — As a direct subsidiary of China’s largest oilfield equipment group, we have the resources, engineering depth (314 R&D engineers), and manufacturing capacity (180,000+ m² campus with 2,100 advanced machines) to deliver complex offshore equipment on time.
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80+ years of oilfield heritage — Founded in 1941, we have been designing and building offshore equipment since the earliest days of marine drilling in China. Our designs incorporate decades of lessons learned from the South China Sea’s typhoon‑prone environment.
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Full API, ATEX & class society compliance — We design and manufacture to API 16A (BOPs), API 16D (control systems), API 6A (wellheads & trees), API 7K (drawworks), and API 8C (hoisting). ATEX and IECEx Zone 1/2 certification available. ABS, DNV, BV classification included for most products.
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Proven in the South China Sea — Our offshore equipment has accumulated millions of operating hours on fixed platforms and jackup rigs in one of the world’s most challenging marine environments. References and case studies available.
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Complete in‑house manufacturing — We forge, machine, heat treat, assemble, and test every critical component in our own facilities — not subcontracted. This means full traceability and shorter lead times.
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Global service & spare parts — We maintain offshore‑specific spares (BOP seal kits, valve actuators, control pod components) in Dubai, Singapore, and via our Houston agent. Our field engineers hold BOSIET, HUET, and CA‑EBS offshore survival certification.
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Competitive direct manufacturer pricing — No trading company markups. You pay factory‑direct prices for Sinopec‑level quality — typically 20‑30% below Western brands for equivalent API certification.
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Warranty — 12‑24 months on mechanical components (depending on product). Extended warranty up to 5 years available. Corrosion warranty 5 years for properly maintained coatings.
Frequently Asked Questions (FAQ)
Q1: What is the typical lead time for offshore equipment?
For standard items (API 6A gate valves, wellhead components, API 16D HPUs): 4‑6 months. For large equipment (platform drilling rig packages, BOP stacks, subsea trees): 8‑12 months depending on complexity. We maintain an inventory of common spares (seal kits, valve parts, sensors) for urgent needs.
Q2: Do you provide classification society certification (ABS, DNV, BV)?
Yes. We can supply all offshore equipment with ABS, DNV, BV, or CCS classification. The certification cost is included in the price for most products. Third‑party surveyor witness testing is welcome at our facility.
Q3: Can your offshore equipment be operated in Arctic or cold‑climate environments?
Yes — we offer Arctic packages with low‑temperature impact‑tested steel (-45°C), heated hydraulic reservoirs, insulated enclosures for electronics, and anti‑icing coatings. Our equipment is operating on the Russian Arctic shelf.
Q4: What ATEX ratings do you offer for offshore equipment?
We supply equipment rated for ATEX/IECEx Zone 1 (likely presence of explosive gas during normal operation) and Zone 2 (unlikely, short duration). Intrinsically safe (Ex ib) pendants, flameproof (Ex d) enclosures, and increased safety (Ex e) motors are available [4†L11-L14][4†L23-L27].
Q5: Can your BOP control system be integrated with third‑party BOP stacks?
Yes — we have integrated our API 16D control systems with BOP stacks from Cameron, NOV (Shaffer), and other major brands. We need the BOP’s function list, operating pressures, and electrical interface specifications.
Q6: What is the maximum water depth for your subsea equipment?
Our subsea wellhead and tree components are hyperbaric tested to 4,000 meters (13,000 ft) water depth. The API 6A/17D compliant design uses pressure‑compensated hydraulics and NACE MR0175 materials to withstand deepwater HP/HT conditions [3†L15-L17].
Q7: Do you offer offshore equipment on a rental basis?
Yes — for workover units, BOP stacks, and wellhead equipment, we offer short‑term rentals (3‑12 months) for platform intervention or emergency response. Rental includes spare parts and remote technical support. Minimum rental period is 90 days.
Q8: What documentation do you provide with offshore equipment?
Each equipment package includes: API / class society certificates, material traceability reports (EN 10204 3.1), NDE reports (MPI, UT), hydrostatic / function test certificates, dimensional inspection reports, operation & maintenance manuals, and as‑built drawings.
Q9: Can you provide training for offshore crews on your equipment?
Yes — we offer 1‑2 weeks of on‑platform training for your crew. The training covers safe operation, maintenance procedures, troubleshooting, and emergency shutdown. For subsea equipment, we provide simulator‑based training at our facility.
