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Heavy duty workover equipment

Technical Specifications – Heavy Duty Workover Equipment

XJ Series – Core Heavy Duty Specifications

Model	Max Static Hook Load	Drawworks HP	Engine / Power	Carrier Drive	Mast Clearance Height
XJ250	735 kN (165,000 lbf)	250 hp	Cat C9 / 350 HP	10×8	31 m
XJ350	900 kN (202,330 lbf)	350 hp	360 HP class	10×8	31.7 m
XJ450	1,125 kN (252,900 lbf)	450 hp	Cat C13 / 440 HP	10×8	34 m
XJ550	1,350 kN (303,000 lbf)	550 hp	Cat C15 / 475 HP	10×8	35 m
XJ650	1,580 kN (355,200 lbf)	650 hp	Cat C18 / 630 HP	12×8	35 m
XJ750	1,700 kN (382,000 lbf)	750 hp	Dual Cat C15 / 440 HP each	14×8	38 m
XJ1000	1,800 kN (404,700 lbf)	750 hp	1,000 HP class	14×8	38 m
XJ1200	2,250 kN (505,800 lbf)	1,000 hp	1,000+ HP (dual engine)	14×10	39.3 m

XJ650 – Heavy Duty Workover Specifications (Best‑Selling Model)

The XJ650 Drilling & Workover Rig is a versatile, heavy‑duty rig, specifically designed for efficient drilling and workover operations. Powered by a robust Caterpillar C18 engine, this rig can reach up to 2,000 m in drilling depth and 7,000 m in workover depth. Renowned for its powerful capability, stability, and mobility, the XJ650 rig is highly popular among users across South America, Western Africa and the Middle East.

Parameter	Specification
Drilling depth (3-1/2″ DP)	2,000 m (6,560 ft)
Workover depth (2-7/8″ DP)	7,000 m (23,000 ft)
Workover depth (3-1/2″ DP)	5,500 m (18,000 ft)
Workover depth (4-1/2″ DP)	4,200 m (13,800 ft)
Servicing depth (2-7/8″ EUE tubing)	8,500 m (27,900 ft)
Max static hook load	1,580 kN (355,200 lbf)
Max hook load	1,575 kN (354,000 lbf)
Engine	Caterpillar C18, 470 kW (630 HP) at 2,100 rpm
Racking board capacity	2,000 m of 4-1/2″ DP
Wireline diameter	Φ29 mm (1-1/8″)
Traveling system	4×5
Max travel speed	45 km/h (28 mph)
Carrier drive	Self‑propelled 12×8
Overall dimensions (L×W×H)	19.9 × 3.1 × 4.37 m
Weight	55,000 kg (121,250 lb)
Air assist brake system	KOBELT Disc with matched caliper
Max wind resistance	30 m/s (98 ft/s)

ZJ40 – Heavy Duty Truck‑Mounted Drilling & Workover Rig

The ZJ40 adopts double Caterpillar C18 engines with Allison M6620AR transmissions. It is the best‑selling mobile drilling rig for both oil drilling and workover purposes, reaching up to 4,000 m drilling depth and 10,000 m workover depth, with 2,250 kN max hook load.

Parameter	Specification
Drilling depth (4-1/2″ DP)	4,000 m (9,840 ft)
Workover depth	10,000 m (32,800 ft)
Max hook load	2,250 kN (505,800 lbf)
Engine configuration	Dual Caterpillar C18, each 630 HP
Transmission	Dual Allison M6620AR
Carrier drive	Self‑propelled 14×10
Mast clearance height	24 m (79 ft)
Racking board capacity	4,000 m of 4-1/2″ DP
Traveling system	6×5
Max travel speed	45 km/h (28 mph)
Total weight	76,000 kg (1,676,000 lbs)
Air assist brake system	KOBELT Disc

Applications – Where Our Heavy Duty Workover Equipment Excels

Deep well workover and recompletion – pulling rods, tubing and pumps; fishing; scale removal; zone isolation – covering well depths from 4,000 m to 9,000 m.
HPHT well intervention – high‑pressure, high‑temperature wells requiring 1,500+ kN hook load and extended mast clearance.
Heavy fishing operations – retrieve broken drill pipe, dropped tubing, bit cones and other downhole debris.
Milling and section milling – cut damaged casing sections and dress fish tops with heavy‑duty milling tools.
Deep well abandonment – permanent plugging of depleted deep wells with heavy cement plugs.
Cluster well development – self‑propelled 12×8 or 14×10 carriers allow rapid moves between closely spaced wellheads.
Arctic campaigns (-45 °C) – cold‑weather materials and heat preservation technology proven in Russia.
Offshore platform intervention – SHXJ series fixed‑platform workover rigs with hook loads from 900 to 2,250 kN.

Why Choose SJ Petro for Heavy Duty Workover Equipment?

Because heavy duty workover equipment is a major capital investment. You need a manufacturer who has proven its equipment in the world’s deepest wells and harshest environments.

Your Challenge	SJ Petro’s Answer
"I need to workover wells down to 9,000 m with 2,250 kN hook load.”	XJ1200 rated for 9,000 m workover depth (2-7/8″ DP) with 2,250 kN maximum static hook load.
"I need API certification for an international tender.”	Full API 4F, 7K, 8C compliance. Authorised to use API monogram. Complete certification packages.
"I need one rig that can do both heavy workover and drilling.”	XJ450, XJ550, XJ650, XJ750, XJ1000 and XJ1200 are true 2‑in‑1 rigs. XJ650 drilling depth reaches 2,000 m.
"I need reliable power components with global parts availability.”	Caterpillar engines + Allison transmissions – industry standard, parts available in every major oilfield worldwide.
"I operate in extreme cold – down to -45 °C.”	Arctic package – low‑temperature materials, low‑temp hydraulics, battery warmers, engine heaters. Three ZJ40 arctic rigs delivered to Russia.
"I need to reduce fuel costs and emissions.”	Oil‑electric dual‑drive options available across SXJ150–SXJ750 and SXJ150–XJ850 ranges. Electric drive reduces fuel consumption and noise while producing zero on‑site emissions.

More reasons to trust SJ Petro:

Sinopec Group heritage – founded in 1941, over 80 years of oilfield equipment engineering
Top‑ranked Chinese manufacturer – ranks 2nd on the list of China Top 10 Petroleum Drilling and Production Equipment Manufacturers, rated AAA by China Petrochemical Industry and Banks
In‑house manufacturing – annual production capacity: 100 workover rigs, 100 drilling rigs, 120 cementing units, 80 fracturing units
50,000 m² assembly yard – 24 rig‑up positions, simultaneous commissioning of 12 drilling or workover rigs
API 4F, 7K, 8C certified – authorised to use API monogram
Global track record – heavy duty workover equipment delivered to South America, Western Africa, Middle East, United States, Indonesia, Russia and beyond
Flexible commercial terms – milestone payments (30/40/30), operating leases and direct financing available for qualified buyers

Frequently Asked Questions (FAQ) – Heavy Duty Workover Equipment

Q1: What is considered "heavy duty” workover equipment?

A: Heavy duty workover equipment refers to rigs with a maximum static hook load exceeding 1,000 kN (225,000 lbs) and the ability to workover wells deeper than 5,000 m. Our XJ series heavy duty models – XJ550 (1,350 kN), XJ650 (1,580 kN), XJ750 (1,700 kN), XJ1000 (1,800 kN) and XJ1200 (2,250 kN) – are specifically designed for deep‑well intervention, HPHT operations and heavy fishing jobs.

Q2: What workover depths can your heavy duty XJ series rigs reach?

A: Our heavy duty models cover depths from 5,800 m up to 9,000 m:

Model	2-7/8″ DP	3-1/2″ DP	4-1/2″ DP
XJ550	5,800 m	4,500 m	3,600 m
XJ650	7,000 m	5,500 m	4,200 m
XJ750	8,000 m	6,500 m	5,000 m
XJ1000	8,000 m	6,500 m	5,000 m
XJ1200	9,000 m	7,500 m	6,000 m

Q3: Can your heavy duty workover rigs be used for drilling operations?

A: Yes. XJ550, XJ650, XJ750, XJ1000 and XJ1200 are true 2‑in‑1 machines. The XJ650 can perform both workover and drilling operations, reaching up to 2,000 m drilling depth (3-1/2″ DP). XJ450 and above models can handle drilling operations for medium and shallow wells when equipped with a rotary table.

Q4: Are your heavy duty workover rigs API certified?

A: Yes. Our XJ series is designed, manufactured and tested in accordance with API Spec Q1, 4F, 7K, 8C and relevant standards. We are authorised to use API monogram on products under these specifications.

Q5: What engine and transmission combinations are used?

A: XJ250 uses Caterpillar C9 with Allison 4700 OFS. XJ650 uses Caterpillar C18. XJ750 uses dual Caterpillar C15 engines with Allison M5610HR transmissions. ZJ40 uses dual Caterpillar C18 engines with Allison M6620AR transmissions.

Q6: What electric or hybrid drive options are available?

A: SJ Petro has developed oil‑electric dual‑drive across the SXJ150–SXJ750 range and full electric drive across the SXJ150–XJ850 range. Features include electric drive electric chassis, energy storage type grid‑powered workover rigs, and automated workover rigs integrating pipe handling equipment to achieve derrick manning reduction and wellsite crew consolidation.

Q7: Do you offer heavy duty rigs for arctic climates?

A: Yes. SJ Petro has delivered three ZJ40 truck‑mounted cold‑weather drilling rigs to Orenburg Drilling Company in Russia, specially designed for arctic areas with low‑temperature materials and heat preservation technology. The arctic package includes heated control cabins, low‑temperature hydraulic fluids, engine block heaters and battery warmers.

Q8: What is the warranty on heavy duty workover equipment?

A: 12 months after commissioning or 18 months after shipment – whichever occurs first. The warranty covers manufacturing defects on all components (carrier, engine, transmission, drawworks, mast, hydraulic system). Extended warranty (up to 5 years) is available for an additional fee.

Q9: What is the lead time for a heavy duty workover rig?

A: Standard lead times from order confirmation:

XJ450–XJ550 (standard configuration): 5–6 months
XJ650–XJ750 (standard configuration): 6–8 months
XJ1000–XJ1200 (standard configuration): 7–9 months
Custom builds (arctic, desert, electric drive): 8–10 months

Expedited delivery may be available – contact our sales team.

Q10: Do you offer financing or leasing for heavy duty workover equipment?

A: Yes. For qualified buyers, we offer direct financing through partner banks (terms up to 5 years), operating leases (low monthly payments) and milestone payment plans (30/40/30). Contact our sales team for a lease proposal.

Q11: What safety features are included on your heavy duty rigs?

A: Our heavy duty rigs include KOBELT disc brake systems with matched calipers as air assist brakes, anti‑collision crown‑block devices, automatic mast lock systems, fail‑safe hydraulic valves, wind speed monitoring systems with automated alarms and emergency stop buttons at multiple locations. The main brake is band type or hydraulic disc type; the auxiliary brake can be pneumatic water‑cooled disc brake, hydromatic brake or electromagnetic eddy current brake.

Q12: How do I get a firm price quote for heavy duty workover equipment?

A: Contact our technical sales team with: