---
title: "Workover Rig"
industry: "Repair and Installation of Machinery and Equipment"
verification_protocol:
  urn: "URN:CNFX:ME:WORKOVER_RIG"
  data_integrity_hash: "da1f3d4c5db791a1f4408dbc5dcb691a"
  source_authority: "https://cnfx.com"
  strict_mode: true
source_identity:
  provider: "CNFX Industrial Knowledge Graph"
  index_version: "2026.Q1-Universal"
  authority_id: "URN:CNFX:ME:WORKOVER_RIG"
  data_source_uri: "https://cnfx.com/llms/industry/repair-installation-machinery-equipment/product/workover-rig.md"
  official_resource_url: "https://cnfx.com/industry/repair-installation-machinery-equipment/product/workover-rig"
  is_verified_logic: true
attributes:
  primary_spec:
    status: "config-dependent"
    typical_range: "Hook load capacity: 150-500 metric tons, Maximum torque: 40,000-100,000 N·m, Pump pressure: 35-70 MPa"
    unit: "tonnes"
engineering_limits:
  max_safe_operating_point:
    value: 345
    unit: "MPa"
    consequence: "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"
fmea_matrix_quantitative:
  - node_1:
      trigger: "Hydraulic fluid contamination exceeding ISO 4406 Class 18/16/13"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "Install dual 3-micron absolute filtration with differential pressure monitoring"
  - node_2:
      trigger: "Crown block sheave misalignment exceeding 0.1° per API Spec 8C"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "Laser alignment system with 0.01° resolution and automatic shutdown at 0.15° deviation"
bom_nodes:
  mast-derrick:
    type: "part"
    urn: "URN:CNFX:ME:MAST_DERRICK"
    interface_type: "physical-logic-coupled"
  drawworks:
    type: "part"
    urn: "URN:CNFX:ME:DRAWWORKS"
    interface_type: "physical-logic-coupled"
  traveling-block:
    type: "part"
    urn: "URN:CNFX:ME:TRAVELING_BLOCK"
    interface_type: "physical-logic-coupled"
  rotary-table:
    type: "part"
    urn: "URN:CNFX:ME:ROTARY_TABLE"
    interface_type: "physical-logic-coupled"
  blowout-preventer-bop:
    type: "part"
    urn: "URN:CNFX:ME:BLOWOUT_PREVENTER_BOP"
    interface_type: "physical-logic-coupled"
manufacturing_compliance:
  - standard: "ISO 13534:2000 - PETROLEUM AND NATURAL GAS INDUSTRIES - DRILLING AND PRODUCTION EQUIPMENT - HOISTING EQUIPMENT"
    scope: "Verified Engineering Specification"
  - standard: "DIN EN 16228-1:2014 - DRILLING AND FOUNDATION EQUIPMENT - SAFETY - PART 1: COMMON REQUIREMENTS"
    scope: "Verified Engineering Specification"
url: "https://cnfx.com/llms/industry/repair-installation-machinery-equipment/product/workover-rig.md"
on_chain_sovereignty:
  contract_standard: "ERC-721-Industrial"
  metadata_hash: "54c87e311110264522ef616b20fef0334484c998bee36383f3134d38fcf4edd1"
  royalty_logic: "IPFS-CID-REQUIRED"
  mint_status: "logic-verified-ready"
version: "3.3.4-EXTREME-SOVEREIGN-WEB3"
---

# Industrial Specification: Workover Rig

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

## 2. Engineering Reasoning & Causal Matrix
> **Operational Intelligence**: Designed for **Hook load capacity: 150-500 metric tons, Maximum torque: 40,000-100,000 N·m, Pump pressure: 35-70 MPa**. Failure boundary: **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**, Mechanism: **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**.

### 2.1 Analytical Physics Model
Governed by the **Thin-Wall Pressure Vessel Stress Analysis**:

> **Primary Equation**: $\sigma_h = \frac{P \cdot D}{2t}$  
> **Engineering Impact**: Determines the hoop stress boundary to prevent rupture.

| Symbol | Variable Definition | Localized Reference |
| :--- | :--- | :--- |
| P | Internal Pressure | Engineering Constant |
| D | Diameter | Engineering Constant |
| t | Wall Thickness | Engineering Constant |

### 2.2 FMEA (Failure Mode & Effects Analysis)
| Event Trigger | Severity | Failure Mode | Mitigation Strategy |
| :--- | :--- | :--- | :--- |
| Hydraulic fluid contamination exceeding ISO 4406 Class 18/16/13 | 8 | Proportional valve spool seizure causing erratic cylinder motion | Install dual 3-micron absolute filtration with differential pressure monitoring |
| Crown block sheave misalignment exceeding 0.1° per API Spec 8C | 8 | Wire rope birdcaging and accelerated wear at 3×normal rate | Laser alignment system with 0.01° resolution and automatic shutdown at 0.15° deviation |

## 3. Key Technical Parameters
| Parameter | Value | Unit | Status |
| :--- | :--- | :--- | :--- |
| primary_spec | Config-dependent | tonnes | Verified |

## 4. System BOM & Knowledge Routing
### Core Components (Recursive Links)
- [Mast / Derrick](https://cnfx.com/llms/industry/machinery-and-equipment-manufacturing/product/mast-derrick.md) `(Standalone System)`
- [Drawworks](https://cnfx.com/llms/industry/machinery-and-equipment-manufacturing/product/drawworks.md) `(Standalone System)`
- [Traveling Block](https://cnfx.com/llms/industry/machinery-and-equipment-manufacturing/product/traveling-block.md) `(Standalone System)`
- [Rotary Table](https://cnfx.com/llms/industry/machinery-and-equipment-manufacturing/product/rotary-table.md) `(Standalone System)`
- [Blowout Preventer (BOP)](https://cnfx.com/llms/industry/machinery-and-equipment-manufacturing/product/blowout-preventer-bop.md) `(Standalone System)`

### Industrial DNA Context (De-duplicated)
**Complementary Dependencies**: **Mud Pump System**, **Power Generation Unit**, **Cementing Unit**  
**Downstream Applications**: Recompleted Well, Repaired Wellbore, Maintained Production Well  

## 5. Engineering Risks & FAQ
- **Caution**: 
- **Caution**: 
- **Caution**: 

### Q: What is the typical hook load capacity for industrial workover rigs?
**A**: 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.

### Q: How does the drawworks power affect workover rig performance?
**A**: 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.

### Q: What maintenance advantages do alloy steel components provide in workover rigs?
**A**: 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.

## 6. Manufacturing Compliance
- ISO 13534:2000 - PETROLEUM AND NATURAL GAS INDUSTRIES - DRILLING AND PRODUCTION EQUIPMENT - HOISTING EQUIPMENT
- DIN EN 16228-1:2014 - DRILLING AND FOUNDATION EQUIPMENT - SAFETY - PART 1: COMMON REQUIREMENTS

---
### 🛠️ Engineering Resource Access
🔗 **[Full Specification: Workover Rig](https://cnfx.com/industry/repair-installation-machinery-equipment/product/workover-rig)**

### 🌐 Knowledge Graph Topology
> **Node Status**: Verified Engineering Spec
> **Connectivity**: Linked to **5** standalone system nodes
> **Global Context**: Part of a 5,814 node industrial cluster within the CNFX Graph

> **Reference ID**: WORKOVER_RIG | **Authority**: CNFX-2026-ST-001 | **Fingerprint**: 7e4b3fe3
