Structured Manufacturing Data (2026)

Workover Rig

Based on aggregated insights from structured 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

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 Structure

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

Manufacturer profiles with relevant production capability in China

Add your factory

Manufacturer listings support early research and capability understanding. They are not certification, ranking, or transaction guarantees.

Technical documentation
4/5
Manufacturing capability
4/5
Inspection readiness
5/5
Supplier transparency
3/5

These scores are example evaluation dimensions, not real customer ratings, country-specific buyer feedback, or live inquiry activity.

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 basis: CNFX manufacturer profiles, technical classification, publicly available product information, and ongoing plausibility checks for Repair and Installation of Machinery and Equipment.

Data Basis

CNFX manufacturer profiles, technical classification, publicly available product information, and ongoing plausibility checks.

Preliminary Technical Classification
This page supports structured research, RFQ preparation, and supplier evaluation. It does not replace buyer-led supplier qualification, standards review, or technical approval.

Request Manufacturing Insight for Workover Rig

Ask for use case, specification boundaries, supplier type, and RFQ preparation information for Workover Rig.

Your business information is used only to process this request.

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?

Compare manufacturer profiles with relevant product and process capability.

Create Manufacturer Profile Contact Us
Previous Product
Wind Turbine Installation Crane
Last Product