Adding Pipe to the String
In this process the new joint is guided over to the drill hole, the tool joint is doped, and stabbed into the end of the pipe suspended in the rotary table with the slips.
Adding pipe to the string.
The joints are threaded together using the pipe spinner, kelly spinner, or spinning chain. Final torque is provided by the tongs.
The drawworks lifts the kelly and attached string to facilitate removal of the slips.
Potential Hazards
- being struck by:
- swinging kelly and pipe
- tongs if the stabber misses the stump
- the jerk or spinning chain
- being caught between the swinging pipe and the tongs
- being caught between the joint of pipe being stabbed and the stump
- getting pinched between tongs or pipe spinner and pipe
- slips, trips, and falls
Possible Solutions
- Never step over a jerk chain and stay clear of spinning chain when a connection is being made.
- Keep hands away from end of stump or inside of pipe.
- Keep feet and legs away from underneath tongs when the pipe is being stabbed.
- Use proper tong latching techniques and hand and finger placement on tong handles.
- Never stand or walk under suspended loads.
- Keep the work area around the rotary table clean and clear of drilling fluids, mud, ice, snow, debris, and other materials that may cause slipping or tripping.
- Inspect chains for worn or damaged links, and replace a chain having a broken or distorted link with the metal reduced by wear at any point less than 90 percent of its original cross section area.
Knowledge Check Choose the best answer for the question.
5-6. According to the text, why should the work area around the rotary table be kept clean?
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