Rig Inspection is a specialized technical service in the oil and gas drilling industry that verifies the safety, integrity, operational condition, and regulatory compliance of drilling rigs and associated equipment. Inspections are typically performed by independent third-party companies or qualified OEM inspectors in accordance with international standards such as API RP 4G, API Spec 8B, API Spec 8C, API Spec 7K, DS-1, and IADC guidelines.

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The objective is to minimize operational risks, improve equipment reliability, ensure regulatory compliance, and extend the service life of drilling assets.​

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Documentation Review

• Equipment certificates

• Maintenance records

• Load test certificates

• NDT reports

• Previous inspection reports

• OEM manuals

• Calibration certificates

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Common Rig Inspection Deliverables

1. Condition assessment report

2. API RP 4G report

3. NDT report

4. Load-path certification

5. Critical equipment register

6. Repair recommendations

7. Remaining useful life assessment

8. Rig acceptance report

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Hoisting System Inspection

• Derrick/Mast

• Crown block

• Traveling block

• Hook

• Deadline anchor

• Drawworks

• Fast line and deadline

• Drilling line condition

• Sand line system

Typical NDT

• Magnetic Particle Testing (MT)

• Ultrasonic Testing (UT)

• Dye Penetrant Testing (PT)

Well Control Equipment

BOP Stack

• Annular preventers

• Ram preventers

• Choke manifold

• Kill manifold

• Hydraulic control unit

Inspection Standards

• API Standard 53

• OEM maintenance requirements 

Mud Circulation System

• Mud pumps

• Pulsation dampeners

• Standpipe manifold

• Rotary hose

• Mud tanks

• Mixing systems

• Shale shakers

• Degassers

• Desanders/desilters

Electrical Systems

• Main switchgear

• MCC panels

• VFD houses

• Emergency shutdown systems

• Grounding systems

• Hazardous area compliance

Standards

• IEC standards

• ATEX / IECEx requirements 

Safety Equipment

• Emergency stop systems

• Fire detection systems

• Fire suppression systems

• Escape systems

• Lifesaving equipment

• Gas detection systems

Structural Inspection

• Derrick/Mast

• Substructure

• Crown block support structure

• Drill floor structure

• Catwalk and pipe handling structures

• Weld inspection (visual and NDT)

• Corrosion assessment

• Structural integrity review

Standards:

• API RP 4G

• IADC guidelines 

• Magnetic Particle Testing (MT)

• Ultrasonic Testing (UT)

• Dye Penetrant Testing (PT)

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Rotary System Inspection

• Rotary table

• Top Drive System (TDS)

• Swivel

• Kelly drive components (if applicable)

• Torque track systems

• Pipe handling equipment

Top Drive Inspection

• Main gearbox

• Torque bushings

• Link tilt system

• IBOP

• Hydraulic circuits

• Electrical controls

Pressure Containment Equipment

• High-pressure piping

• Choke and kill lines

• Standpipe manifold

• Cementing lines

• Valves and fittings

Verification

• Pressure testing

• Wall thickness measurements

• NDT examinations

Power Generation Systems

• Diesel engines

• Generators

• SCR/VFD systems

• Engine controls

• Fuel systems

• Cooling systems

 Pipe Handling Equipment

• Iron Roughneck

• Catwalk machine

• Pipe racker

• Hydraulic cathead

• Elevator links

• Elevators

• Slips

Many operators require OEM-certified inspection for critical pipe-handling equipment.