RA-8 – Manriding Risk Assessment

Manriding operations, and hoisting personnel above or below the rig floor with a winch to perform rig maintenance, are considered a part of normal routine operations by many companies in the drilling industry.

• Working at height
• Working at distance from Floor
• Concurrent activities
• Overhead moving equipment – travelling block
• Adjacent equipment and machinery
• Adverse weather – heat and cold
• Tools used
• Equipment failure

• Falling from height causing serious injury or potential death.
  • Freefall
  • Stuck in air
• Contact with or struck by moving equipment and/or rotating pipe
  • Pull through Equipment
  • Pull though Sheave
• Heat exhaustion and heat stroke
• Miscommunication causing operation failure or personnel injury
• Dropped tools causing damage to equipment and/or personnel injury.
• Failed equipment causing injury
  • Winch can fail
  • Cable can fail
  • Lifting accessory fails
  • Harness can fail

• Toolbox talks to define tasks, roles & responsibilities and identifying potential hazards
• Permit to Work System
• Pre-use check and inspection of equipment
• Periodic inspection and maintenance of equipment & machinery
• Provision and wearing of fit-for-purpose PPE
• Training and competency of personnel
• Designated winch operator and Signal Man for blind lifts
• The established mean of communication
• No concurrent activity
• DROPS Program – No-Go or Red Zone
• Use of tethered tools
• Warning signs & barriers
• Crane: use a certified manriding basket
• Lifting gear inspection

Winch

• Dedicated Man riding winch
• Overhead stopper to prevent pulling through the sheave
• Two automatic brakes which activate when the operating lever is in the neutral position, or on the loss of power, are fitted.
  • Automatic Disc Brake
  • Automatic Drum Band Brake
• Winch Guard
• Pre-equipped Emergency Lowering Device
• Upper and Lower Limit Switches
• Main Air Emergency Stop Valve
• Reduced SWL – Overload Protection
• Slack Line Device
• Control Valve Lock
• The last 50 ft of wire on the drum is painted red to warn the operator he is approaching the end of the rope.
• An overhoist protection device was placed around 4 ft above the manrider’s head (this could be an oversized link.)

• ER procedures and Team
• Rescue from height procedures
• Trained Medic and medical facility
• Emergency evacuation vehicle
• Backup lowering system for manriding winch

• NA

• NA

• NA