SHXJ112 Offshore Workover Rig

Technical Specifications – SHXJ112 Offshore Workover Rig

Parameter	SHXJ112‑DB (AC VFD)	SHXJ112‑H (Hydraulic)	SHXJ112‑E (Electric)
Max. Hook Load	1,120 kN (252,000 lb)	Same	Same
Drawworks Power	220 kW AC VFD	220 kW hydraulic motor	185 kW AC motor
Power Source	Platform 480‑690V, 350 kVA	1 x 160 kW diesel engine	Platform 380‑480V, 280 kVA
Workover Depth (2‑7/8" tubing)	3,500 m (11,500 ft)	3,400 m	3,500 m
Workover Depth (3‑1/2" tubing)	2,800 m (9,200 ft)	2,700 m	2,800 m
Light Drilling Depth (4‑1/2" DP)	1,800 m (5,900 ft)	Not recommended	1,600 m
Mast Type	Telescopic (self‑erecting)	Same	Single‑piece or telescopic
Mast Clear Height	31 m (102 ft)	31 m	31 m
Substructure Height	4.5 m (14.8 ft)	4.5 m	4.5 m
Substructure Footprint	7.2 m x 5.5 m (24' x 18')	Same	Same
Max Single Module Weight	12 tons (26,400 lb)	12 tons	11 tons
Total Operating Deck Load	68 tons (150,000 lb)	70 tons	66 tons
Rotary Table	13‑5/8" opening, electric	13‑5/8", hydraulic	13‑5/8", electric
Top Drive Option	Yes (1,120 kN AC VFD)	No (not compatible)	No
Skid System	Hydraulic (standard)	Optional	Optional
Certifications	API 4F, 7K, 8C; ISO 9001; HSE	Same	Same

Applications – Where the SHXJ112 Earns Its Keep

Operation	Typical Details	Why SHXJ112 is the Right Choice
Daily workover	Pump changes, rod & tubing pulls to 3,500m	Enough hook load for 90% of jobs, light enough for fast moves
Stuck packer pulling	Up to 1,000‑1,100 kN required	1,120 kN gives you margin – not just on‑paper rating
Sidetracking (short radius)	≤150m mill window & kickoff	AC VFD version with top drive handles this smoothly
Well deepening	Add 100‑200m of new hole	Possible with AC VFD version – not for hydraulic
Fishing	Broken rods, tubing, lost tools	Plenty of pull for most fishing scenarios in medium wells
Cement squeeze & plug	Low‑pressure formations	Good control with AC VFD; hydraulic version also works
Platform maintenance campaigns	5‑10 wells consecutively	Skid system makes slot‑to‑slot moves fast – no crane wait

Perfect fit platforms:

Fixed platforms with 12‑15 ton crane capacity
Wells between 2,500m and 3,500m depth
Mature fields where workover frequency is 2‑4 jobs per month
Platforms with moderate deck space (7m x 10m clear area)

Not ideal for: Wells deeper than 4,000m, heavy drilling, or continuous stuck pipe pulling above 1,000 kN (then go SHXJ158).

Product Series – SHXJ112 in Context

Our SHXJ (offshore workover) family for fixed platforms:

Model	Hook Load	Drive Options	Deck Load	Typical Crane Needed	Primary Use
SHXJ90	900 kN	Elec / Hyd	~53t	10t	Light intervention, shallow wells
SHXJ112	1,120 kN	AC VFD / Hyd / Elec	~68t	12‑15t	Standard workover, medium wells (best seller)
SHXJ135*	1,350 kN	Hyd / AC	~78t	15‑20t	Medium‑heavy workover
SHXJ158	1,580 kN	AC VFD	~98t	20t+	Heavy workover + light drilling

OEM Customization – Making the SHXJ112 Yours

Because no two platforms are identical, we’ve built a flexible customization process around the SHXJ112.

What customers commonly customize:

Need	Our Solution
Crane limit is 10 tons, not 12	Split the heaviest module (drawworks/power unit) into two – 6t + 5t. Mast sections already under 8t.
Platform has only 380V, 150 kVA	Choose hydraulic or electric‑standard (not AC VFD). Or add a step‑up transformer (adds 1.5t).
I want top drive but also want hydraulic backup	Order the "dual drive” option: AC VFD top drive + hydraulic drawworks as backup. Rare, but we’ve done it.
My wellheads are 2.2m apart (tight spacing)	Narrow skid base: 2.8m wide instead of 3.5m. We’ve done 2.5m on a special order.
I need to store the rig when not in use for 6 months	Add a containerized storage package: all modules fit into three 20‑ft ISO containers (with fork pockets).
No platform crane at all	Davit crane kit (manual or electric) that mounts on substructure. Mast raises itself telescopically.

Customization lead times:

Standard SHXJ112 (any drive, no split): 6‑7 months
With module splitting or narrow skid: 7‑8 months
Dual drive or containerized storage: 8‑9 months

Why Choose SJ for the SHXJ112?

Reason	What You Actually Get
Over 200 SHXJ112 units delivered	This isn’t a new design. We’ve refined everything – from hose routing to access ladder placement – based on field feedback.
Three drive options, one rig footprint	You don’t need to redesign your deck layout if you switch drive types later. Mounting points are identical.
API monogram on every pressure component	No shortcuts. Your third‑party inspector will find full traceability from mill to finished product.
Global spares availability	We stock SHXJ112‑specific spares in Houston, Dubai, and Singapore. Common wear parts (brake pads, filters, hoses) are off‑the‑shelf industrial items.
24/7 remote support	Our service team includes former workover supervisors who have run SHXJ112s themselves. They speak "rig hand” English, not textbook English.
Sinopec backing with independent agility	We have the resources of a state‑owned enterprise but the responsiveness of a specialized manufacturer.

Frequently Asked Questions (FAQ)

Q1: What does "SHXJ112” stand for?

A: "SH” = offshore (Shanhai / Hǎi), "XJ” = workover rig (Xiū jǐng), "112” = nominal hook load in metric tons x10? Actually 112 means 112 metric tons = 1,120 kN. Yes – simple.

Q2: How does the SHXJ112 compare to the SHXJ135?

A: SHXJ135 has 1,350 kN hook load (about 20% more) and deck load ~78 tons (15% heavier). If your wells are consistently deeper than 3,500m or you often pull stuck pipe above 1,000 kN, go SHXJ135. Otherwise, SHXJ112 saves you money and deck space.

Q3: Which drive do you recommend for most customers?

A: For new platforms with reliable power – AC VFD (DB version). The control smoothness and top drive option are worth it. For old platforms with dodgy power or no space for VFD cabinets – hydraulic (H version). The electric‑standard (E version) is a budget compromise we don’t sell often.

Q4: Can I upgrade from rotary table to top drive later?

A: Only if you order the AC VFD version initially. The hydraulic and electric‑standard versions don’t have the mast reinforcement and control interface for top drive. So if you think you might want top drive in the future, start with the DB version – you can run it with a rotary table first, then plug in the top drive later.

Q5: What is the typical fuel consumption on the hydraulic version?

A: About 22‑28 liters per hour at normal workover loads. A 1,000‑liter day tank runs for a 36‑hour continuous operation. We recommend two small day tanks for redundancy.

Q6: What’s the warranty?

A: 18 months from shipment or 12 months from commissioning (whichever first). AC VFD drives have 24 months on the inverter and motor. Hydraulic pumps and motors also 24 months.

Q7: Do you provide offshore commissioning?

A: Yes. Our team will be on your platform for rig‑up supervision, load testing, and first job assistance. Typically 2‑3 weeks. We also provide a remote commissioning option via video (but we recommend in‑person for first rig).

Q8: What training is included?

A: Standard: 3 days on‑site training for up to 6 crew (2 days classroom, 1 day hands‑on). We also offer a "train the trainer” certification. Training materials include a full operator manual, maintenance guide, and troubleshooting flowchart.

Q9: Can the SHXJ112 be used on a jack‑up rig instead of a fixed platform?

A: Yes – with minor modifications to the substructure base (we add jack‑up specific tie‑down points). Several SHXJ112 units are operating on jack‑ups in the Middle East. Specify "jack‑up mounting” at order stage.