Workover equipment manufacturers

Technical Specifications – XJ Series Workover Rigs

The tables below provide key specifications for SJ Petro XJ series self‑propelled workover rigs. For complete data sheets (dimensional drawings, API certifications, test reports), contact our technical sales team.

XJ Series – Complete Model Lineup

Model	Workover Depth (2-7/8″ DP)	Nominal Hook Load	Max Static Load	Drawworks HP	Carrier Drive
XJ250	3,200 m / 10,500 ft	400 kN	675 kN (151,700 lbf)	250 hp	10×8
XJ350	3,200 m / 10,500 ft	600 kN	900 kN (202,330 lbf)	350 hp	10×8
XJ450	4,500 m / 14,800 ft	800 kN	1,125 kN (253,000 lbf)	450 hp	10×8
XJ550	5,800 m / 19,000 ft	1,000 kN	1,350 kN (303,000 lbf)	550 hp	10×8
XJ650	7,000 m / 23,000 ft	1,200 kN	1,580 kN (355,200 lbf)	650 hp	12×8
XJ1000	8,000 m / 26,200 ft	1,500 kN	1,800 kN (405,000 lbf)	750 hp	14×8
XJ1200	9,000 m / 29,500 ft	1,800 kN	2,250 kN (505,800 lbf)	1,000 hp	14×10

XJ250 – Detailed Technical Specifications

The XJ250 is widely recognized as the best economic workover rig for its reliable performance, innovative design, and cost‑effectiveness.

Parameter	Specification
Workover depth (2-7/8″ DP)	3,200 m (10,500 ft)
Servicing depth (2-7/8″ EUE tubing)	3,200 m (10,500 ft)
Rated hook load	400 kN (90,000 lbf)
Max hook load	735 kN (165,000 lbf)
Engine	Caterpillar C9, 260 kW (350 HP) at 2,100 rpm
Transmission	Allison 4700 OFS
Derrick height	31 m (102 ft)
Racking board capacity	3,200 m of 2-7/8″ EUE tubing
Max travel speed	45 km/h (28 mph)
Carrier drive	Self‑propelled 10×8
Overall dimensions (L×W×H)	18.5 × 2.9 × 4.2 m
Weight	50,000 kg (110,230 lb)

XJ650 – Detailed Technical Specifications

The XJ650 is our best‑selling heavy‑duty workover rig, renowned for its powerful capability, stable performance, and great mobility across South America, Western Africa, and the Middle East.

Parameter	Specification
Workover depth (2-7/8″ DP)	7,000 m (23,000 ft)
Drilling depth (3-1/2″ DP)	2,000 m (6,560 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 wind resistance	30 m/s (98 ft/s)
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)
Brake system	KOBELT disc with matched caliper

XJ550 – Offshore and Export Success

The SXJ550 workover rig is one of our most successful export models, featuring 550 hp drawworks power, a raised mast, and a seven‑axle heavy‑duty off‑road chassis. It has been delivered to Indonesia and other international markets, where its integrated all‑pad equipment layout design has earned widespread recognition from domestic and international users.

Applications – Where Our Workover Equipment Excels

SJ Petro workover equipment is deployed across all types of well intervention and remedial operations worldwide:

• Workover and recompletion – pulling rods, tubing, and pumps; fishing; scale removal; zone isolation – covering well depths from 1,000 m to 9,000 m.

• Shallow to medium drilling – when equipped with a rotary table, XJ450 and above can handle drilling operations for medium and shallow wells, saving the cost of a separate drilling spread.

• Fishing operations – retrieve broken drill pipe, dropped tubing, bit cones, and other downhole debris using our complete suite of fishing tools.

• Milling and section milling – cut damaged casing sections and dress fish tops with our full range of milling equipment.

• Zone isolation and plug‑back – set bridge plugs and cement retainers for abandonment or remedial cementing.

• Cluster well development – self‑propelled 10×8, 12×8, or 14×10 carriers allow rapid moves between closely spaced wellheads – no crane, no separate transport.

• Remote exploration – self‑propelled carriers access locations with poor roads and no crane support.

• Arctic campaigns (-45°C) – available Arctic‑rated rigs with heated cabins, low‑temperature hydraulics, proven in Russia’s Orenburg field.

• Desert development (50°C+) – sand‑sealed components, oversized cooling, and reinforced chassis for Middle Eastern operations.

• Offshore platform intervention – our fixed‑platform workover rigs (SHXJ series) cover hook loads from 900 to 2,250 kN.

Product Types – XJ Series Configurations from SJ Petro

We manufacture the full XJ series of self‑propelled workover rigs, covering light, medium, heavy, and ultra‑deep capacity. Each configuration is available with standard API documentation and optional third‑party witness testing.

1. Light to Medium Workover (XJ150 – XJ350)

Best for: Shallow wells (1,000–3,200 m), light servicing, water wells, small operators, well testing, fishing, and pump checks.

Key models: XJ250 – widely regarded as the best economic workover rig worldwide, featuring Caterpillar C9 engine and Allison 4700 OFS transmission. 10×8 self‑propelled carrier with maximum travel speed 45 km/h (28 mph).

2. Medium to Heavy Workover (XJ450 – XJ550)

Best for: Most onshore workover operations – conventional oil, mature fields, wells up to 5,800 m depth. When equipped with a rotary table, these rigs can handle drilling operations for medium and shallow wells.

Key models: XJ550 (SXJ550) – 550 hp drawworks power, seven‑axle heavy‑duty off‑road chassis, proven export success to Indonesia and other international markets. Capable of 5,800 m workover depth with 2-7/8″ DP and 4,500 m with 3-1/2″ DP.

3. Heavy to Ultra‑Deep Workover (XJ650 – XJ1200)

Best for: Deep wells (7,000–9,000 m), HPHT well intervention, and dual‑purpose drilling/workover needs.

Key models: XJ650 – best‑selling heavy‑duty workover rig, powered by Caterpillar C18 engine (470 kW / 630 HP) on a 12×8 self‑propelled carrier. True 2‑in‑1 rig capable of both workover (7,000 m) and drilling (2,000 m) operations.

XJ1200 – our most powerful self‑propelled workover rig, rated for 9,000 m workover depth with a massive 2,250 kN static load. 14×10 self‑propelled carrier for maximum stability and traction in the most demanding environments.

4. Arctic‑Rated Workover Equipment

Best for: Siberia, Northern Canada, Alaska – any location where standard equipment fails in extreme cold.

Features: Heated control cabins, low‑temperature hydraulic fluids (pour point below -55°C), engine block heaters, battery warmers, heated air intakes for pneumatic systems, insulated hydraulic lines.

5. Desert‑Rated Workover Equipment

Best for: Middle East, North Africa, arid basins with ambient temperatures exceeding 50°C.

Features: Oversized cooling systems (radiators and heat exchangers), sand‑sealed electrical enclosures, dust filtration on air intakes, corrosion‑resistant coatings, reinforced chassis for rough terrain.

6. Offshore Fixed‑Platform Workover Rigs

Best for: Offshore platforms requiring compact, corrosion‑protected workover equipment.

Features: Skid‑mounted design, hook loads from 900 to 2,250 kN, diesel or electric drive, corrosion‑protected components, DNV/ABS certification available.

7. Refurbished Workover Rigs (Cost‑Effective Option)

We occasionally have trade‑ins from customers upgrading their fleets. Refurbished rigs are completely disassembled, inspected, fitted with new wear parts, repainted, load tested, and come with a 6‑month warranty. Price is typically 40–60% of new. Contact our sales team for current inventory.

Why Choose SJ Petro as Your Workover Equipment Manufacturer?

Because a workover rig is not a commodity – it’s a long‑term investment that requires a manufacturer who stands behind every weld, every test, and every component.

Your Challenge	SJ Petro’s Answer
"I need API certification for an international tender.”	Full API 4F, 7K, 8C certification. API monogram available. Complete documentation packages including MTRs, hydrostatic certificates, and NDT reports.
"I need a rig that can move between wells quickly without a crane.”	Self‑propelled 10×8, 12×8, or 14×10 carriers – drive to location, raise mast hydraulically, no separate transport vehicles required.
"I want a rig that can do both workover and drilling.”	XJ550, XJ650 and above are true 2‑in‑1 rigs. Workover at 7,000 m and drilling at 2,000 m when equipped with a rotary table.
"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 environments – arctic or desert.”	Arctic and desert packages available. Proven track record across six continents. XJ series operating temperature range from -45°C to +50°C.
"I want a single manufacturer for both the rig and the tools.”	We manufacture workover rigs and supply a full range of downhole workover tools through our subsidiary network – one source for your entire well intervention needs.

More reasons to trust SJ Petro:

• Over 40 years of workover equipment manufacturing – founded in 1941, not a new entrant

• State‑owned enterprise under Sinopec Group – financial stability and deep oilfield engineering DNA

• National hi‑tech enterprise – 314 engineers dedicated to product development

• Annual production capacity – 100 workover rigs, 100 drilling rigs, 120 cementing units, 80 fracturing units

• 50,000 sqm assembly yard – 24 rigging‑up positions, simultaneous commissioning of 12 drilling or workover rigs

• Global track record – workover equipment operating in South America, Western Africa, Middle East, United States, Indonesia, Russia, and beyond

• 24‑hour spare parts shipping – emergency parts from our main warehouse

• Lease and financing options – milestone payments, operating leases, and direct financing available for qualified buyers

Frequently Asked Questions (FAQ) – Workover Equipment Manufacturers

Q1: How do I verify that SJ Petro is a real workover equipment manufacturer and not a trading company?

A: We invite you to visit our manufacturing facility in Jingzhou, Hubei, China. You will see our 50,000‑square‑meter assembly yard, our precision machining centers, our API‑certified fabrication shops, and our load test stands capable of testing rigs up to 750 tons. We hold API Q1, API 4F, API 7K, API 8C, ISO9001, and HSE certifications, and we are a wholly‑owned subsidiary of Sinopec Oilfield Equipment Corporation – one of China’s largest oilfield equipment manufacturers. Trading companies cannot produce these credentials.

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

A: Our XJ series covers the full depth spectrum:

Model	Workover Depth (2-7/8″ DP)	Drilling Depth (3-1/2″ DP)
XJ250	3,200 m (10,500 ft)	—
XJ350	3,200 m (10,500 ft)	—
XJ450	4,500 m (14,800 ft)	—
XJ550	5,800 m (19,000 ft)	—
XJ650	7,000 m (23,000 ft)	2,000 m (6,560 ft)
XJ1000	8,000 m (26,200 ft)	—
XJ1200	9,000 m (29,500 ft)	—

Maximum hook load ranges from 300 kN to 2,250 kN (67,440–505,800 lbs), with installed power from 235 HP to 1,300 HP.

Q3: Are your workover rigs API certified?

A: Yes. Our XJ series workover rigs are designed and manufactured in accordance with API Spec Q1, 4F, 7K, 8C and relevant industry standards. We are authorized to use the API monogram. For international tenders, we provide complete certification packages including material test reports (EN 10204 3.1), hydrostatic test certificates, NDT reports (MT, PT, UT as applicable), dimensional inspection reports, and letter of conformance. Third‑party witness testing (SGS, BV, DNV) is available upon request at buyer’s expense.

Q4: What is the lead time for an XJ series workover rig?

A: Standard lead times from order confirmation:

• XJ250–XJ350 (standard configuration): 4–5 months

• XJ450–XJ550 (standard configuration): 5–6 months

• XJ650–XJ1200 (standard configuration): 6–8 months

• Custom builds (arctic, desert, special requirements): 8–10 months

Expedited delivery may be available for an additional fee – contact our sales team for current production slots.

Q5: Do you offer financing or leasing for workover equipment?

A: Yes. For qualified buyers, we offer:

• Direct financing – Through partner banks, terms up to 5 years

• Operating lease – Low monthly payments, return rig at end of term

• Milestone payment plans – 30% deposit, 40% prior to shipment, 30% after site acceptance

• Lease‑to‑own – Payments applied toward purchase

Contact our sales team for a lease proposal based on your credit and jurisdiction.

Q6: Can I buy a refurbished workover rig to save costs?

A: Yes. We occasionally have trade‑ins from customers upgrading their fleets. Refurbished rigs are completely disassembled, inspected, fitted with new wear parts (brake bands, seals, hydraulic components), repainted, load tested, and come with a 6‑month warranty. Price is typically 40–60% of new. Contact our sales team for current inventory.

Q7: What is the warranty on a workover rig?

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, hydraulics). Wear parts are not covered but are available as spares. Extended warranty (up to 5 years) is available for an additional fee.

Q8: Do you provide operator and maintenance training for workover rigs?

A: Yes. For every workover rig purchase, we include:

• 1–2 weeks of on‑site training during commissioning (depending on rig complexity)

• Classroom and hands‑on instruction for up to 6 students

• Digital operation and maintenance manuals

• Video tutorials for common procedures

• 3–6 months of remote video support after delivery (depending on contract)

• Access to online training portal

Additional training (factory courses in Jingzhou, extended field training) is available at extra cost.

Q9: Do you supply downhole workover tools (fishing tools, mills, bridge plugs)?

A: Yes. Through our subsidiary SJS Ltd. and our extensive supply network, we provide a full range of downhole workover tools including overshots, fishing spears, taper mills, junk mills, section mills, bridge plugs (API 11D1 V3 certified), cement retainers, and retrievable packers. This integrated approach simplifies procurement and ensures compatibility between surface and downhole equipment.

Q10: Can your workover rigs operate in extreme cold (-45°C) or extreme heat (50°C+)?

A: Yes. We offer specialized packages for extreme environments:

• Arctic package (-45°C) – Heated control cabins, low‑temperature hydraulic fluids (pour point below -55°C), engine block heaters, battery warmers, heated air intakes for pneumatic systems, insulated hydraulic lines. Proven in Russia’s Orenburg field.

• Desert package (50°C+) – Oversized cooling systems (radiators and heat exchangers), sand‑sealed electrical enclosures, dust filtration on air intakes, corrosion‑resistant coatings, reinforced chassis for rough terrain.