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902 Well Site Preparation and Drilling Safety
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Making Up Pipe in the Mousehole

During this process, the crew swings the kelly out over the mousehole and stabs it into a new joint of pipe.

Workers on rig swinging out the kelly
The roughneck in the background is swinging out the kelly.

The driller then spins up the kelly using the kelly spinner or spinning chain and the crew uses tongs to torque the joint.

Potential Hazards

  • being struck or pinched by the kelly
  • losing footing while swinging the kelly out over the mousehole and stabbing it into a new joint of pipe
  • being struck by or caught in the spinning chain

Possible Solutions

  • Use proper hand placement.
  • Keep the work area around the rotating table clean and clear of mud, ice, snow, debris and other materials that may cause slipping or tripping.
  • Inspect chain for broken or distorted links. Chains with the metal reduced by wear at any point less than 90 percent of its original cross section area should be discarded.
  • Lubricate and maintain guide rollers to prevent undue wear on the chain or cable.

Knowledge Check Choose the best answer for the question.

5-4. What is the hazard while swinging the kelly out over the mousehole?