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SHXJ90 offshore workover rig

SHXJ90 offshore workover rig

SJ Petroleum Machinery (Sinopec Group subsidiary) has built offshore drilling & workover equipment since 1941. API/ISO certified. We focus on practical, field‑ready rigs – from heavy duty to ultra‑light. Thousands operate worldwide.

No Top Drive – But You Won’t Miss It：The SHXJ90 uses a hydraulic or electric rotary table with a kelly drive. For workover depths up to 3.000m, this is perfectly adequate. Top drive would add too much weight and complexity for this class. If you absolutely need a top drive, please look at our SHXJ158 or larger models.

Built for Frequent Moves Between Fields：Because the SHXJ90 is so light, you can actually move it by helicopter (modules under 2 tons for the smallest – yes, we’ve done this for an operator in Papua New Guinea). More commonly, it’s moved by supply boat and offloaded using the platform crane. A complete teardown, transport to another platform, and rig‑up takes about 5‑7 days.

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Technical Specifications – SHXJ90 Offshore Workover Rig

Parameter SHXJ90‑E (Electric) SHXJ90‑H (Hydraulic)
Max. Hook Load 900 kN (202,000 lb) 900 kN (202,000 lb)
Drawworks Power 110 kW AC motor 110 kW hydraulic motor
Power Unit Platform 380‑480V, 120 kVA 1 x 110 kW diesel engine (or platform hydraulic)
Workover Depth (2-7/8" tubing) 3,000 m (9,800 ft) 2,800 m (9,200 ft)
Workover Depth (3-1/2" tubing) 2,500 m (8,200 ft) 2,300 m (7,550 ft)
Mast Type Single‑piece (split into 2 sections) Same
Mast Clear Height 24 m (79 ft) 24 m (79 ft)
Substructure Height 3.5 m (11.5 ft) – fixed 3.5 m
Substructure Footprint 6.0 m x 4.5 m (20' x 15') Same
Max Single Module Weight 8 tons (17,600 lb) 8 tons
Total Operating Deck Load ~52 tons (114,600 lb) ~54 tons (119,000 lb)
Rotary Table 10‑1/2" opening, electric drive 10‑1/2" opening, hydraulic motor
Control System PLC + touchscreen Joystick + analog gauges
Certifications API 4F, 7K, 8C; ISO 9001; HSE Same


Where the SHXJ90 Really Shines – Applications

Application Typical Well Details Why SHXJ90 is Ideal
Routine pump change 2,200m rod pump, 2‑7/8" tubing Light load, quick move – rig up in morning, work by afternoon
Rod & tubing pull 2,500‑3,000m, no heavy scale 900kN is plenty; lighter rig means lower mobilization cost
Paraffin scraping Any depth Low torque requirement – hydraulic version runs slow & steady
Light fishing Dropped hand tools, broken rods (not stuck packers) Sufficient pull for most fishing jobs in shallow‑medium wells
Well cleanout Sand washing, circulation Small rig = less fuel burn during long circulation jobs
Completion running Initial tubing & rods on new wells (if no drilling rig) Enough hook load for standard completions up to 3,000m
Abandonment prep Pulling tubing, setting shallow plugs Cost‑effective for low‑budget P&A campaigns

Not recommended for: Stuck packer pulling (>700 kN sustained), long sidetracking, or wells deeper than 3,500m. For those, move up to HXJ135 or SHXJ158.

Perfect for:

  • Satellite wellhead platforms (4‑6 slots)

  • Marginal fields with intermittent workover needs

  • Platforms with crane capacity ≤15 tons

  • Fields where workover frequency is low but the rig needs to be stored on‑platform (small footprint)

Product Range – Where the SHXJ90 Sits in Our Offshore Family

Model Hook Load Deck Load Drive Typical Well Depth Best For
SHXJ90 900 kN ~53 tons Elec / Hyd ≤3,000m Satellite platforms, marginal fields
HXJ135 1,350 kN ~78 tons Hyd / AC ≤3,500m Larger satellite, light workover
SHXJ158 1,580 kN ~98 tons AC VFD ≤4,000m Heavy workover + light drilling
SHXJ180 1,800 kN ~115 tons AC VFD ≤4,500m Deep workover

OEM Customization – We’ll Make It Fit Your Exact Constraints

Because the SHXJ90 is often bought for non‑standard platforms, we treat every order as a semi‑custom build.

Real customizations we’ve done:

Customer Request Our Solution
"My crane can only lift 5 tons” Split mast into 4 sections (heaviest 4.8 tons). Add a small A‑frame on substructure for self‑assembly.
"I have no diesel storage – only platform hydraulic supply” Remove diesel engine, add hydraulic interface manifold. Rig runs off platform HPU.
"My deck is only 5m x 5m” Narrow‑frame substructure (4.8m x 4.8m). Foldable work deck extensions.
"I need to move the rig between three platforms weekly” Add quick‑release connectors for all hoses & cables. Color‑coded lifting points. Reduced module count to 5.
"I want to run it remotely from shore” Add remote control system via 4G/5G with cameras. (We’ve done this for a platform 15km offshore.)
"No crane at all – just a davit” Davit‑lift mast sections (max 3 tons each). Include manual winch for assembly.

Customization lead time:

  • Standard SHXJ90 (electric or hydraulic): 5‑6 months

  • With module splitting / special mounting: 6‑7 months

  • Remote control / extreme customization: 7‑8 months

Why Choose SJ for the SHXJ90?

Reason Practical Benefit
Hundreds of light workover rigs delivered We’re not guessing. The SHXJ90 design has been refined over 20+ years and 80+ units.
Ultra‑low deck load Many platforms can’t take a 70‑ton rig but can handle 55 tons. That’s the difference between installing and not installing.
Dual drive flexibility One basic design, two power options. If your platform’s power situation changes, we can convert (e.g., electric to hydraulic) with a retrofit kit.
Field service from people who’ve used these rigs Our offshore supervisors have personally run SHXJ90s. They know the common issues (which are few) and how to fix them fast.
Sinopec backing – but with small‑company responsiveness Big enough to have global spares, small enough to answer your call within 24 hours.
Straightforward documentation Operator manuals in plain English (not translated from Chinese by software). Laminated quick‑cards for each workstation.

Frequently Asked Questions (FAQ)

Q1: What’s the difference between SHXJ90 and HXJ135?

A: SHXJ90 is smaller (900kN vs 1,350kN hook load), lighter deck load (~53 tons vs ~78 tons), and cheaper. HXJ135 can handle deeper wells (3,500m vs 3,000m) and slightly heavier pulls. If your wells are under 3,000m and crane capacity is under 15 tons, take the SHXJ90.

Q2: Can I use the SHXJ90 on a platform with a 5‑ton crane?

A: Yes – but we’ll need to split the mast into 4 sections (max 4.8 tons). The drawworks/power unit would be the heaviest at ~5.2 tons, which may exceed 5 tons. Alternative: use a small davit or manual winch for that module. Or choose the hydraulic version and place the power unit on the supply boat deck with long hoses (we’ve done this).

Q3: How much fuel does the hydraulic version use?

A: At typical workover load (~60% power), about 18‑22 liters per hour. A 500‑liter day tank runs for a full 24‑hour shift. For intermittent work, a 200‑liter tank is fine.

Q4: Can I run the electric version from a portable generator on the platform?

A: Yes – as long as the generator provides 380‑480V, 120 kVA continuous (150 kVA peak). We can supply a weatherproof generator skid as an option.

Q5: What kind of warranty?

A: 18 months from shipment or 12 months from commissioning. For the hydraulic version, pumps and motors have 24 months. Wear items (hoses, seals, brake pads) are not covered – but they’re cheap and locally available.

Q6: Do you provide training?

A: Standard: 2 days on‑site (classroom + hands‑on) for up to 6 crew. We also offer a "train the trainer” package where we certify one of your senior crew to train others.

Q7: What spares should I keep on the platform?

A: We provide a recommended spares kit for 12 months: hydraulic hoses (set), seal kit, pressure filter, brake pads, and a few sensors for the electric version. Cost ~3‑4% of rig price.

Q8: Can the SHXJ90 be used for snubbing?

A: Not directly – it’s a conventional workover rig. But we can add a snubbing unit interface (guide beams and hydraulic connections) so you can bring a portable snubbing unit onto the platform and use the SHXJ90’s mast for support.

Q9: What is the typical delivery lead time?

A: Standard SHXJ90 (electric or hydraulic) – 5 months from order. Custom module splits add 1 month. We’ve done rush orders in 4 months – but that requires existing stock of major components.

Q10: How do I get a firm quote?

A: Email workover@sjpetro.com with:

  • Platform crane capacity (tons)

  • Typical well depth and tubing size

  • Do you have platform AC power? (Y/N)

  • Any deck space constraints (sketch or photo helps)

We’ll reply with a budget quote in 3‑5 days and a technical questionnaire.

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