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850HP Workover Rig

The 850HP Workover Rig is a high-end ultra-deep ultra-heavy-duty truck-mounted workover unit, serving as a full-dimensional performance upgrade over the 750HP model and a core ultra-deep well operation flagship in the complete product lineup. Adopting premium 850HP high-torque diesel power assembly and reinforced 14×8 heavy-duty all-terrain self-propelled chassis, this rig delivers explosive peak power output, industry-leading 2250kN ultra-heavy lifting capacity and superior cross-country adaptive mobility, breaking the ultra-deep heavy-load operation limits of conventional 750HP top-tier rigs. Equipped with a 38m high-strength thickened double-section hydraulic telescopic lattice mast and optimized 7×8 extreme heavy-load hoisting system, it stably supports 9000m ultra-deep well workover with 2-7/8'' drill pipe and maximum 10000m super-deep well service with standard tubing, fully covering ultra-extreme heavy-load, ultra-high-pressure and super-high-difficulty downhole working conditions that 750HP rigs cannot handle. Featuring fully modular integrated compact layout, imported industrial heavy-duty transmission system and upgraded intelligent closed-loop hydraulic control logic, the whole machine strictly complies with API 4F, API 7K and global petroleum machinery industry standards. It is exclusively deployed for national strategic ultra-deep oilfield refined maintenance, ten-thousand-meter level super-deep reservoir extreme heavy overhaul, ultra-high-pressure wellbore remediation and long-cycle ultra-high-intensity large-scale cluster operation projects, delivering industry-leading heavy-load stability, ultimate global extreme condition adaptability and optimal long-term comprehensive cost-effectiveness.

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Core advantages

Designed around the operating requirement.

850HP Industrial Ultra-High-Torque Power System

Configured with large-displacement industrial high-efficiency diesel power unit and matched heavy-duty imported transmission assembly, outputting stable 850HP (625kW) rated power and massive low-speed torque reserve. Compared with 750HP rigs, it features full-range sufficient power surplus, ultra-fast hoisting response speed and 24-hour uninterrupted full-load stable cyclic operation, completely meeting the ultra-stringent power demands of 9000m ultra-deep well extreme heavy overhaul, ultra-high-pressure downhole plugging removal and high-resistance super-complex wellbore treatment in national super-deep oilfield key projects.

2250kN Extreme Heavy-Lift Performance

Adopts upgraded 7×8 multi-rope ultra-heavy-load travelling system and integral fully forged thickened alloy load-bearing components, with a certified maximum static hook load of 2250kN and rated hook load of 1800kN. Equipped with high-power air-controlled disc auxiliary brake, intelligent full-range anti-collision safety device and multi-level overload protection system, it perfectly copes with ultra-extreme heavy-load working conditions including super-large-scale ultra-deep casing integral replacement, ultra-thick heavy wax blockage remediation, deep complex stuck pipe batch salvage and ten-thousand-meter level super-deep well ultra-heavy tripping operations, fully adapting to ultra-high-intensity super-deep well overhaul scenarios of national strategic core oilfields.

Reinforced 14×8 All-Terrain Super-Heavy Chassis

Equipped with industry-upgraded reinforced 14×8 ultra-heavy self-propelled drive chassis with luxury constant-temperature heat-preservation cab and intelligent cold-start heating system, featuring ultimate structural bearing capacity, enhanced cross-country trafficability and flexible stable steering performance. It supports rapid integral cross-well and cross-region long-distance relocation without auxiliary hoisting and transportation equipment, adapting to high-altitude severe cold frozen soil, mountainous rugged roads, muddy wetlands and desert Gobi ultra-complex road conditions for large-scale super-deep well cluster intensive operations.

Advanced Modular Intelligent Integrated Layout

Scientifically and centrally integrates high-power drive, heavy-load hydraulic, ultra-heavy hoisting and intelligent electric control modules with standardized compact layout, effectively saving on-site construction space and improving adaptability to narrow and extreme operation sites. Equipped with full-automatic hydraulic telescopic mast rapid erecting/folding system and humanized integrated intelligent operation platform, it simplifies ultra-complex operation procedures, reduces long-term manual labor intensity and greatly improves overall construction efficiency and multi-level redundant operational safety.

Industrial-Grade Supreme Reliability & Low Lifecycle Maintenance

Adopts world-renowned brand core transmission, hydraulic and control components, paired with fully thickened reinforced heavy-duty mechanical structure, ensuring ultra-stable operating performance and ultra-low failure rate under years of long-term ultra-heavy-load cyclic operation. Universal standardized vulnerable parts configuration and global unified maintenance channels simplify daily inspection and upkeep, significantly reducing long-term operation and spare parts investment for large-scale ultra-deep well long-cycle maintenance projects.

Ultimate Global Extreme Environment Adaptability

Equipped with oversized high-efficiency enhanced circulating heat dissipation system, upgraded thickened wear-resistant and fully enclosed dust-proof structure and full-coverage military-grade anti-corrosion, low-temperature and weather-resistant coating. It stably operates within -40℃ ~ +55℃, adapting to year-round uninterrupted full-load operation in high-altitude severe cold plateaus, high-temperature arid deserts, drought Gobi areas and rugged hilly mountainous regions, covering all global ultra-harsh oilfield working environments.

Product Overview
Product	850HP Workover Rig
Product line	Workover Rigs

Technical Specifications
The depth of work over		9000m (73mm tubing) 5800m (88.9mm DP)
The max. loading		2250kN
The type of traveling system		5×6
Diameter of rope		Φ32
Engine		CAT C18/630 bhp, two sets
The model of gear box		Allison M6620AR, two sets
Mast	Clean height	39m
	The max. static loading	2250kN
Draw work	The max. pull of fast line	280KN
	Diameter. of wire line	32mm
	The max. rotate speed	450rpm
Drilling floor	Height	6m
	Model of rotary table	ZP275

Application

Where this equipment is used.

Ultra-extreme heavy-load overhaul and ultra-high-standard refined maintenance operations for 0-9000m ultra-deep oil and gas wells in national strategic super core oilfields
Top-level high-difficulty super-deep wellbore treatment including ten-thousand-meter level ultra-thick wax deposition removal, large-diameter super-deep casing integral replacement, severe deep stuck pipe batch salvage and ultra-high-pressure ultra-deep well flushing & plugging removal
Long-cycle ultra-high-intensity extreme heavy-duty operation and long-distance cross-region relocation of large-scale ten-thousand-meter super-deep well clusters and remote ultra-harsh oilfield zones
Long-term ultra-deep well extreme heavy repair, deep reservoir large-scale stimulation, comprehensive renovation and capacity expansion maintenance of mature super-deep oilfield strategic blocks
Top-tier ultra-extreme field operation scenarios with super-complex road conditions, global harsh climates and year-round uninterrupted ultra-high-intensity heavy-load operation demands
High-altitude severe cold plateau regions, high-temperature arid desert zones, rugged mountainous terrains and remote large-scale ten-thousand-meter super-deep well key oilfield environments

Next step

Send the operating requirement.

For a useful technical response, include the target well conditions, operating depth or pressure, expected quantity, destination and any required configuration.

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Configuration

Options for a matched equipment scope.

Available configurations can be matched to the equipment model, operating conditions and project requirements.

Customize extreme heavy-load hook parameters and ten-thousand-meter well hoisting performance to adapt to 9000m ultra-deep well heavy overhaul and 10000m super-deep well service industry standards
Upgrade full intrinsically safe explosion-proof premium electrical system to meet top-level safety specifications for Class 0 hazardous explosion zones and national super-large petrochemical key projects
Optimize 14×8 reinforced ultra-heavy chassis travelling parameters and integral reinforced bearing structure to adapt to high-altitude cold, muddy, desert and Gobi ultra-complex road conditions
Configure matched super-large-flow high-pressure mud circulation and high-efficiency ten-thousand-meter ultra-deep well flushing auxiliary system for full-coverage ultra-complex wellbore treatment
Upgrade industrial-grade full intelligent real-time data monitoring, dynamic load feedback and automatic fault early warning & intelligent diagnosis system
Customize professional ten-thousand-meter ultra-deep well extreme heavy-duty operation manuals and standardized senior operator systematic training documents
Adopt military-grade full anti-rust, anti-corrosion, dust-proof and ultra-weather-resistant coating for long-term global extreme outdoor heavy-load operation
Equip ultra-low-temperature rapid start-up system and full-machine integrated constant-temperature heat preservation device for high-cold plateau ultra-deep oilfield stable operation

Buyer questions

Frequently asked about this equipment.

The following questions address common equipment selection and operating considerations.

What core upgrades does the 850HP XJ850 rig have compared with the 750HP model?

The 850HP XJ850 ultra-deep ultra-heavy-duty workover rig features a fully upgraded 850HP ultra-high-torque power system and 2250kN maximum static hook load, supporting 9000m ultra-deep well workover and 10000m ten-thousand-meter super-deep well service, far exceeding the 8000m operation limit of 750HP rigs. It adopts a reinforced 14×8 ultra-heavy all-terrain chassis and upgraded 7×8 extreme heavy-load hoisting system, delivering surging power reserve, industry-top extreme heavy-load capacity and ultimate global environmental adaptability. It can undertake ultra-extreme high-intensity ten-thousand-meter super-deep well heavy overhaul projects that 750HP flagship rigs cannot support, achieving top-level full-dimensional performance upgrade.

Can the XJ850 rig adapt to high-altitude ultra-complex terrain and long-distance relocation?

Absolutely. Adopting a reinforced 14×8 super-heavy all-terrain self-propelled chassis with enhanced structural strength and cross-country trafficability, the rig features stable driving and flexible steering performance. It realizes rapid integral cross-well and cross-region long-distance transfer without auxiliary transportation equipment, perfectly adapting to continuous high-intensity operation of ten-thousand-meter super-deep well clusters in high-altitude cold plateaus, mountainous areas, deserts and other ultra-harsh terrains.

What is the standard working depth of the XJ850 workover rig?

The standard XJ850 rig achieves 9000m nominal workover depth with 2-7/8'' drill pipe and 7200m with 3-1/2'' drill pipe, with a maximum service depth up to 10000m ten-thousand-meter super-deep well with standard tubing. We can flexibly customize power, hoisting and supporting configurations according to on-site ultra-deep extreme working conditions to meet personalized project demands.

What exclusive core advantages does the 850HP top-tier rig possess?

The XJ850 (XJ2250) rig is the top-end ultra-deep extreme heavy-duty workover equipment for national strategic ten-thousand-meter oilfield projects. It features 850HP high-torque explosive power, 2250kN ultra-extreme lifting capacity and 38m thickened reinforced telescopic mast, independently completing top-level difficult operations such as ten-thousand-meter super-deep large casing replacement, ultra-thick heavy wax removal and batch complex deep stuck pipe salvage, completely breaking the depth and load bottlenecks of conventional flagship workover rigs.

What professional after-sales services are provided for the XJ850 rig?

We provide complete ten-thousand-meter ultra-deep well professional installation drawings, full-set authoritative operation and maintenance manuals and lifelong original spare parts supply, with permanent free remote professional technical guidance. For national strategic super-deep oilfield key projects, we arrange senior petroleum engineering expert teams for on-site precision commissioning, installation guidance and one-on-one customized professional operator training.

Supplier context

Why this product is considered.

We possess top-tier R&D and precision standardized manufacturing capabilities for 850HP XJ850 ultra-deep ultra-heavy-duty workover rigs, with all products strictly manufactured in accordance with API 4F, API 7K and international petroleum machinery authoritative standards. Targeted at national strategic ten-thousand-meter super-deep well extreme heavy-load overhaul and global ultra-harsh environment long-cycle ultra-high-intensity operation scenarios, this rig achieves full-dimensional flagship performance upgrade on the basis of 750HP rigs, perfectly filling the market gap between conventional top-tier workover rigs and professional ten-thousand-meter ultra-deep well operation equipment. Adopting industrial 850HP high-torque power system, heavy-duty imported transmission and reinforced 14×8 all-terrain chassis, the equipment maintains stable peak full-load operation output and ultra-low failure rate under long-term extreme heavy-load working conditions. Every XJ850 rig undergoes strict factory full-load impact testing, 72-hour continuous full-load operation debugging and multi-dimensional structural safety inspection before delivery. We provide full-process one-stop services including exclusive project scheme customization, standardized precision production, global safe shipping and professional on-site technical support, effectively helping customers improve ten-thousand-meter ultra-deep well heavy-duty operation efficiency and reduce long-term comprehensive super-deep oilfield maintenance costs.

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