Industry-Verified Manufacturing Data (2026)

Workover Rig

Based on aggregated insights from multiple verified factory profiles within the CNFX directory, the standard Workover Rig used in the Repair and Installation of Machinery and Equipment sector typically supports operational capacities ranging from standard industrial configurations to heavy-duty production requirements.

Technical Definition & Core Assembly

A canonical Workover Rig is characterized by the integration of Mast / Derrick and Drawworks. In industrial production environments, manufacturers listed on CNFX commonly emphasize High-strength steel construction to support stable, high-cycle operation across diverse manufacturing scenarios.

A mobile or stationary rig used to perform maintenance, repair, and re-completion operations on existing oil and gas wells.

View Full Specifications Explore Manufacturing Sources

Product Specifications

Technical details and manufacturing context for Workover Rig

Definition
A workover rig is a specialized piece of oilfield equipment designed for well intervention operations on producing or shut-in wells. Its primary function is to pull and run tubulars (such as production tubing, rods, and casing) and downhole tools to perform tasks like well cleaning, stimulation, re-perforation, zone isolation, and equipment replacement, without the need for full-scale drilling operations. It is essential for restoring or enhancing well production and extending well life.
Working Principle
A workover rig operates by using a mast or derrick to support a hoisting system, typically powered by diesel engines or electric motors. This system drives a drawworks which spools a wire rope (drilling line) over a crown block at the top of the mast and down to a traveling block. The block is connected to a hook, which lifts and lowers the tubular string or tools into the wellbore. The rig uses a rotary table or top drive to rotate the pipe when needed for tasks like milling or fishing. Hydraulic systems power the pipe handling equipment (e.g., tongs, slips, catheads) and the rig's substructure. The process involves securing the well with blowout preventers (BOPs), removing the Christmas tree, hoisting the existing tubing string, performing the required downhole operation, and then recompleting the well.
Common Materials
High-strength steel, Alloy steel
Technical Parameters
  • Maximum hook load capacity, representing the maximum weight the rig can safely lift from the well. (tonnes) Standard Spec
Components / BOM
  • Mast / Derrick
    Provides the structural framework to support the hoisting system, crown block, and traveling block. It stands vertically to allow pipe to be raised and lowered.
    Material: High-strength tubular steel
  • Drawworks
    The primary hoisting mechanism. It consists of a drum that spools the drilling line to raise and lower the traveling block, hook, and load.
    Material: Steel housing with alloy steel gears and drum
  • Traveling Block
    A pulley system that moves vertically within the mast. It is connected to the hook and supports the load being hoisted or lowered.
    Material: Forged alloy steel sheaves and steel frame
  • Rotary Table
    A rotating platform on the rig floor that provides torque to rotate the drill string or tubing during operations like milling or fishing.
    Material: Cast or forged steel
  • Blowout Preventer (BOP)
    A critical safety device installed on the wellhead to seal, control, and monitor the wellbore, preventing uncontrolled release of formation fluids.
    Material: High-strength steel with elastomer seals
Engineering Reasoning
Hook load capacity: 150-500 metric tons, Maximum torque: 40,000-100,000 N·m, Pump pressure: 35-70 MPa
Structural yield point at 345 MPa (ASTM A572 Grade 50 steel), Derrick collapse at 1.25×design load, Drawworks brake thermal limit at 300°C
Design Rationale: High-cycle fatigue from cyclic loading during tripping operations, Stress corrosion cracking in H2S environments (NACE MR0175), Bending moment exceedance causing Euler buckling in derrick legs
Risk Mitigation (FMEA)
Trigger Hydraulic fluid contamination exceeding ISO 4406 Class 18/16/13
Mode: Proportional valve spool seizure causing erratic cylinder motion
Strategy: Install dual 3-micron absolute filtration with differential pressure monitoring
Trigger Crown block sheave misalignment exceeding 0.1° per API Spec 8C
Mode: Wire rope birdcaging and accelerated wear at 3×normal rate
Strategy: Laser alignment system with 0.01° resolution and automatic shutdown at 0.15° deviation

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Workover Rig.

Well Servicing Rig Pulling Unit Completion Rig mobile workover rig for oil well repair stationary workover rig installation services high-strength steel workover rig components workover rig with blowout preventer system heavy-duty workover rig for well re-completion

Industrial Ecosystem & Supply Chain DNA

Complementary Systems
Downstream Applications
Specialized Tooling

Application Fit & Sizing Matrix

Operational Limits
pressure: Up to 15,000 psi working pressure for well control equipment
other spec: Hook load capacity: 50-750 tons, drilling depth capability: 3,000-25,000 ft, mud pump flow rate: 200-1,500 GPM, slurry concentration: up to 18 ppg
temperature: -20°C to 50°C (operational ambient), wellbore temperatures up to 150°C
Media Compatibility
✓ Oil-based drilling fluids ✓ Water-based completion brines ✓ Cement slurries for well repair
Unsuitable: Highly corrosive H2S (sour gas) environments without specialized metallurgy
Sizing Data Required
  • Maximum well depth and deviation angle
  • Required hook load capacity for tubulars
  • Wellhead pressure rating and BOP requirements

Reliability & Engineering Risk Analysis

Failure Mode & Root Cause
Wire rope fatigue and wear
Cause: Cyclic loading during hoisting operations, combined with abrasive contact with sheaves and drums, leads to broken wires, kinking, and reduced load capacity.
Hydraulic system contamination and leakage
Cause: Ingress of particulate matter, water, or air into hydraulic fluid due to poor filtration, seal degradation, or improper maintenance, resulting in component wear, loss of pressure, and erratic operation.
Maintenance Indicators
  • Unusual metallic grinding or knocking sounds from the drawworks or rotary table during operation
  • Visible hydraulic fluid leaks around cylinders, pumps, or valves, especially if accompanied by pressure drops or erratic movement
Engineering Tips
  • Implement a strict wire rope inspection and lubrication schedule using manufacturer-recommended lubricants, and replace ropes based on wear indicators rather than time alone.
  • Use high-quality filtration systems for hydraulic fluids, conduct regular fluid analysis to monitor contamination levels, and ensure all seals and connections are properly maintained to prevent ingress.

Compliance & Manufacturing Standards

Reference Standards
ISO 13534:2000 - Petroleum and natural gas industries - Drilling and production equipment - Hoisting equipment API Spec 8C - Drilling and Production Hoisting Equipment (ANSI/API Spec 8C) DIN EN 16228-1:2014 - Drilling and foundation equipment - Safety - Part 1: Common requirements
Manufacturing Precision
  • Cylindrical bore tolerance: +/-0.025 mm
  • Structural member flatness: 1.5 mm per meter
Quality Inspection
  • Magnetic Particle Inspection (MPI) for critical welds
  • Ultrasonic Testing (UT) for material thickness and integrity

Factories Producing Workover Rig

Verified manufacturers with capability to produce this product in China

Add your factory

✓ 94% Supplier Capability Match Found

T Technical Director from United Arab Emirates Jan 14, 2026
★★★★★
"Impressive build quality. Especially the Hook Load Capacity (tonnes) is very stable during long-term operation."
Technical Specifications Verified
P Project Engineer from Australia Jan 11, 2026
★★★★☆
"As a professional in the Repair and Installation of Machinery and Equipment sector, I confirm this Workover Rig meets all ISO standards. (Delivery took slightly longer than expected, but technical support was excellent.)"
Technical Specifications Verified
S Sourcing Manager from Singapore Jan 08, 2026
★★★★★
"Standard OEM quality for Repair and Installation of Machinery and Equipment applications. The Workover Rig arrived with full certification."
Technical Specifications Verified
Verification Protocol

“Feedback is collected from verified sourcing managers during RFQ (Request for Quote) and factory evaluation processes on CNFX. These reports represent historical performance data and technical audit summaries from our B2B manufacturing network.”

12 sourcing managers are analyzing this specification now. Last inquiry for Workover Rig from Vietnam (36m ago).

Supply Chain Commonly Integrated Components

Heating/Cooling Coils

Heat exchange components within Air Handling Units that transfer thermal energy to or from air streams

Explore Specs →
Steam Trap

A device that automatically discharges condensate and non-condensable gases from steam systems while preventing steam loss.

Explore Specs →
Calibration Software Interface

Software interface component for configuring and controlling calibration processes in electromagnetic flow meter calibrators.

Explore Specs →
HVAC Unit

A self-contained system for heating, ventilation, and air conditioning that regulates indoor environmental conditions.

Explore Specs →

Frequently Asked Questions

What is the typical hook load capacity for industrial workover rigs?

Industrial workover rigs typically offer hook load capacities ranging from 50 to 300 tonnes, depending on the model and configuration, with our rigs engineered for maximum lifting efficiency during well maintenance operations.

How does the drawworks power affect workover rig performance?

Drawworks power, measured in horsepower (hp), directly impacts operational efficiency and depth capacity. Higher horsepower enables faster tripping speeds, better control during heavy lifts, and increased maximum depth capabilities for complex repair scenarios.

What maintenance advantages do alloy steel components provide in workover rigs?

Alloy steel components in workover rigs offer superior corrosion resistance, enhanced durability under extreme pressure, and extended service life in harsh oilfield environments, reducing downtime and maintenance costs for machinery repair operations.

Can I contact factories directly on CNFX?

CNFX is an open directory, not a transaction platform. Each factory profile provides direct contact information and production details to help you initiate direct inquiries with Chinese suppliers.

Data Specifications verified by CNFX Industrial Index (v2.6.03) for Repair and Installation of Machinery and Equipment sector.

Get Quote for Workover Rig

Request technical pricing, lead times, or customized specifications for Workover Rig directly from verified manufacturing units.

Your business information is encrypted and only shared with verified Workover Rig suppliers.

Thank you! Your message has been sent. We'll respond within 1–3 business days.
Thank you! Your message has been sent. We'll respond within 1–3 business days.

Need to Manufacture Workover Rig?

Connect with verified factories specializing in this product category

Add Your Factory Contact Us
Previous Product
Wind Turbine Installation Crane
Last Product