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Multi-stage Mast Mountain Workover Rig

Multi-stage Mast Mountain Workover Rig

The Multi-Stage Mast Mountain Workover Rig is SJ Petro’s specialized solution for operators working in the world’s most challenging terrain—steep mountain slopes, narrow ridgelines, high altitudes, and extreme weather conditions. Built on the proven XJ series platform and featuring advanced multi-stage telescoping mast technology, this rig delivers exceptional working height, superior mobility, and reliable performance where conventional equipment simply cannot go.

All-Weather Operation – Mountain Climate Ready：

Mountain operations often involve extreme weather conditions—heavy snow, freezing temperatures, intense sun, and sudden storms. SJ Petro’s mountain workover rigs are engineered for reliable operation across the full spectrum of mountain climate conditions, from -35°C to +50°C, with specialized configurations available for high-altitude and low-temperature environments.

Complete Line of Support Equipment：

SJ Petro offers a comprehensive range of mechanized and automated support tools for mountain workover operations, including power catwalks, hydraulic pipe boxes, hydraulically elevated driller’s cabins, and iron roughnecks for workover operations. These tools enhance safety and efficiency in challenging mountain conditions.

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Technical Specifications

SJ Petro’s Multi-Stage Mast Mountain Workover Rigs are available across the full XJ series range. Below are the key specifications for representative models:

Model XJ250 XJ350 XJ450 XJ550 XJ650 XJ1000 XJ1200
Rated Hook Load 400 kN 600 kN 800 kN 1,000 kN 1,200 kN 1,500 kN 1,800 kN
Max. Static Hook Load 675 kN 900 kN 1,125 kN 1,350 kN 1,470 kN 1,800 kN 2,250 kN
Workover Depth (2-7/8″ DP) 2,000 m 3,200 m 4,500 m 5,800 m 7,000 m 8,000 m 9,000 m
Workover Depth (3-1/2″ DP) — 2,500 m 3,500 m 4,500 m 5,500 m 6,500 m 7,500 m
Drawworks Horsepower 250 hp 350 hp 450 hp 550 hp 650 hp 750 hp 1,000 hp
Mast Type Multi-Stage Telescoping Multi-Stage Telescoping Multi-Stage Telescoping Multi-Stage Telescoping Multi-Stage Telescoping Multi-Stage Telescoping Multi-Stage Telescoping
Mast Working Height 31m+ 31m+ 34m 34m 35m 38m 39.3m
Travelling System 3×4 3×4 4×5 4×5 4×5 5×6 5×6
Chassis Configuration Mountain-spec Mountain-spec Mountain-spec Mountain-spec Mountain-spec Mountain-spec Mountain-spec
Terrain Suitability Mountain/Hilly Mountain/Hilly Mountain/Hilly Mountain/Hilly Mountain/Hilly Mountain/Hilly Mountain/Hilly
Operating Temperature -35°C to +50°C -35°C to +50°C -35°C to +50°C -35°C to +50°C -35°C to +50°C -35°C to +50°C -35°C to +50°C
Compliance API 4F, 7K, 8C API 4F, 7K, 8C API 4F, 7K, 8C API 4F, 7K, 8C API 4F, 7K, 8C API 4F, 7K, 8C API 4F, 7K, 8C



Key Mountain-Specific & Multi-Stage Mast Features:

Feature Benefit for Mountain Operations
Multi-Stage Telescoping Mast Maximum working height with compact transport length
Enhanced Gradeability Climbs steep mountain roads safely
Compact Footprint Fits on constrained ridgeline wellsites
Self-Propelled Chassis No separate transport vehicles needed
Hydraulic Mast Erection No crane required at wellsite
All-Weather Operation Reliable in snow, rain, and extreme sun
High-Altitude Ready Engineered for reduced oxygen environments
No-Guyline Option Eliminates anchor point requirements on ridgelines

Applications

SJ Petro’s Multi-Stage Mast Mountain Workover Rigs are deployed across a broad spectrum of challenging terrain operations:

  • Mountainous Oil & Gas Fields – Workover operations in rugged, high-altitude terrain where conventional rigs cannot access

  • Hilly & Rolling Terrain – Operations in regions with steep grades and limited road infrastructure

  • High-Altitude Fields – Engineered for reduced oxygen environments at elevation

  • Remote Mountain Wellsites – Access to wells in locations with narrow, winding access roads

  • Multi-Well Mountain Pads – Rapid mobilization between wells on mountain ridgelines

  • Workover & Well Servicing – Tubing replacement, pump repairs, and production optimization

  • Oil Testing & Fishing – Precision retrieval of downhole tools and equipment

  • Shallow-to-Medium Depth Drilling – When equipped with rotary table, the rig can perform mobile drilling operations

  • Desert and Plateau Operations – Suitable for drilling operations on desert and plateau

Product Types

SJ Petro offers the Multi-Stage Mast Mountain Workover Rig in multiple configurations:

1. Standard Multi-Stage Mast Mountain Workover Rig (XJ Series) – Self-propelled configuration with enhanced gradeability, compact footprint, and multi-stage telescoping mast for mountain operations. Available across XJ250 through XJ1200 models.

2. High-Altitude Mountain Workover Rig – Specialized configuration with engine tuning and systems optimized for reduced oxygen environments at elevation.

3. Low-Temperature Mountain Workover Rig – Engineered for mountain operations in extreme cold with specialized materials and heating systems.

4. No-Guyline Mountain Workover Rig – Eliminates the need for guyline anchors—critical for ridgeline wellsites with limited anchor points.

5. Dual-Power Mountain Workover Rig – Oil-electric dual-drive configuration providing operational flexibility and redundancy.

6. Electric Drive Mountain Workover Rig – Grid-powered configuration for environmentally sensitive mountain areas.

7. LNG-Powered Mountain Workover Rig – Clean-burning natural gas option for regions with gas availability.

8. Quick-Move Mountain Workover Rig – Optimized for rapid relocation between wells in multi-well mountain pads.

9. Single Drum Mountain Workover Rig – Standard drawworks configuration.

10. Double Drum Mountain Workover Rig – Enhanced configuration with additional sand line capability.

OEM & Customization Solutions

Every mountain presents unique challenges, and SJ Petro’s engineering team delivers tailored solutions through our comprehensive OEM and customization capabilities:

  • Custom Mast Configuration – Choose multi-stage or alternative mast configurations based on working height and transport requirements.

  • Mast Height Options – Working height can be optimized for your specific BOPE stack and operational requirements, with heights from 31m to 39.3m.

  • Custom Chassis & Mobility – Adapt chassis specifications and drive configurations to suit your specific terrain and transport requirements.

  • Enhanced Gradeability – Customized power-to-weight ratios and transmission tuning for the grades you face.

  • Compact Footprint Design – Optimized overall dimensions for your specific access road and wellsite constraints.

  • High-Altitude Tuning – Engine and systems optimization for operations at elevation.

  • Climate-Specific Engineering – Low-temperature, desert, and all-weather configurations available.

  • No-Guyline Configuration – Eliminates guyline anchors for congested mountain wellsites.

  • Power System Selection – Choose from diesel (Caterpillar, Detroit Diesel), electric, dual-drive, or LNG configurations.

  • Drum Configuration – Select single drum or double drum configurations.

  • Automation Package – Optional power catwalk, hydraulic pipe box, hydraulic elevated driller’s cabin, and iron roughneck.

  • Well Control Integration – Complete BOPE packages integrated with the rig control system.

  • Turnkey System Integration – From basic workover units to fully integrated packages with complete well control and solids control systems.

Why Choose SJ Petro?

Mountain-Terrain Engineering Expertise

SJ Petro has been designing and manufacturing workover rigs for over four decades, with specific expertise in mountain, swamp, desert, tidal flat, and extremely cold area operations. Our mountain workover rigs are engineered to overcome the unique challenges of rugged terrain—steep grades, narrow roads, limited wellsite space, and extreme weather.

Multi-Stage Mast Technology Leadership

SJ Petro’s multi-stage mast technology delivers superior working height and reach while maintaining a compact transport profile—a critical advantage for operators facing tall BOPE stacks and complex downhole operations in mountain environments. The multi-stage design offers shorter transport length, more convenient and safer installation, and better road transport performance.

Complete Product Range

SJ Petro offers a complete line of workover rigs with maximum static loads ranging from 300 kN to 2,250 kN and workover depths up to 9,000 meters. Our product portfolio includes XJ150, XJ250, XJ350, XJ450, XJ550, XJ650, XJ1000, and XJ1200 series.

Proven Track Record – 200+ Product Models

SJ Petro offers 200 models of products falling in four major categories and twelve series. Our star products include workover rigs, cementing units, fracturing packages, and high-pressure fluid control products.

Industry-Leading Innovation

SJ Petro has developed various fast-moving, high-efficiency, energy-saving new products to meet different environmental and operational requirements, including dual-drum workover rigs, no-guyline workover rigs, oil-electric dual-drive workover rigs, grid-electric energy storage workover rigs, LNG workover rigs, desert workover rigs, low-temperature workover rigs, and mountain workover rigs.

API-Certified Quality

SJ Petro holds API (American Petroleum Institute) , ISO9001 , and HSE management system certifications. Our mast designs comply with API Spec 4F, and our manufacturing processes meet API Spec Q1, 7K, 8C, and RP500 standards.

Global Deployment

SJ Petro workover rigs have been exported to more than 30 countries and regions worldwide, with users in South America, Western Africa, and the Middle East.

One-Stop Solution Provider

Beyond manufacturing, we offer equipment inspection, testing, and major overhaul services. From initial design to field service and spare parts supply, SJ Petro delivers complete oil and gas exploration and production equipment solutions.

Frequently Asked Questions

Q: What is a multi-stage mast mountain workover rig?

A: It is a specialized workover rig engineered for mountainous terrain, featuring a multi-stage hydraulic telescoping mast that provides maximum working height with compact transport length. The rig combines enhanced gradeability, superior off-road mobility, and all-weather operation for challenging mountain environments.

Q: What is the advantage of a multi-stage mast over a single-section mast?

A: A multi-stage mast provides significantly greater working height than a single-section mast while maintaining a compact transport profile. The multi-stage design offers shorter transport length, more convenient and safer installation, and better road transport performance—critical advantages for mountain operations with narrow access roads.

Q: What is the maximum working height of the multi-stage mast?

A: The multi-stage mast delivers working heights from 31 meters to 39.3 meters (102+ feet), depending on the model and configuration.

Q: What rig models are available in mountain configuration?

A: Mountain workover rigs are available across the full XJ series range, from XJ250 through XJ1200, covering hook loads from 400 kN to 1,800 kN and workover depths from 2,000 m to 9,000 m.

Q: Can the mountain workover rig operate in high-altitude conditions?

A: Yes. We offer high-altitude configurations with engine tuning and systems optimized for reduced oxygen environments at elevation.

Q: Does the mountain workover rig require a crane for rig-up?

A: No. The rig features hydraulic mast lifting and telescoping for safe and efficient rig-up and rig-down without crane assistance at the wellsite.

Q: Can the rig be configured without guy lines?

A: Yes. We offer a no-guyline configuration that eliminates the need for guyline anchors—ideal for congested mountain ridgelines with limited anchor points.

Q: What power options are available?

A: We offer diesel engine drive (Caterpillar, Detroit Diesel), electric drive (grid-powered), oil-electric dual-drive, and LNG-powered configurations.

Q: Can the mountain workover rig perform drilling operations?

A: Yes. When equipped with a rotary table, swivel, and drilling tools, the rig can perform as a mobile drilling rig for shallow-to-medium depth wells.

Q: Are your products API certified?

A: Yes. SJ Petro holds API certifications and our mast designs comply with API Spec 4F. Our manufacturing processes meet API Spec Q1, 7K, 8C, and RP500.

Q: Do you offer OEM or customized solutions?

A: Absolutely. We offer comprehensive customization including mast configuration, chassis specification, gradeability tuning, high-altitude tuning, climate-specific engineering, no-guyline configuration, and automation packages.

Q: What is your manufacturing capacity and lead time?

A: We have the largest workover equipment manufacturing base in China with comprehensive production capabilities. Lead times vary by configuration—contact our sales team for specific project timelines.

Q: Do you provide after-sales support and spare parts?

A: Yes. We offer comprehensive after-sales support including spare parts supply, equipment inspection, testing, and major overhaul services.

Q: What specialized mountain configurations are available?

A: We offer high-altitude, low-temperature, no-guyline, dual-power, electric drive, LNG-powered, and quick-move configurations.

Tag: Workover system | Workover equipment manufacturers | Workover Equipment | Workover tools | Workover technology

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