This running procedure is to be used when running a drill string with CDS connections. Following this procedure will greatly reduce the potential to damage your drill string connections.
- Check that the top drives counter balance valve is working correctly. The counter balance valve should apply as little weight to the connection as possible. Too much weight will damage the threads during stabbing and make‐up.
- The top drive and iron roughneck’s torque output should be confirmed with tongs and a recently calibrated load cell prior to running the CDS connection. They should also be checked periodically for accuracy.
- Ensure that each component has a thread protector applied to both the box and pin end when bringing the piece to the floor. Thread protectors must remain on drill pipe or heavy‐weight until they are being made‐up. When racked in the racking board pin protectors are recommended to reduce damage. If lifting protectors are used ensure that the threads are not damaged.
- Before the pipe is made‐up the connection should be inspected for damage. Connections with any damage should be removed from the string and repaired to prevent damage to other connections in the string. Clean any contaminates off threads prior to make‐up.
- Command Energy recommends the use of a copper based thread compound (Jet Lube Special or Equivalent). The thread compound should be spread evenly over the entire threaded area and the pin nose and back of the box. Use paint brush to ensure even application of pipe dope. Over doping cause failure to achieve proper make‐up torques.
- Most drill string components with CDS connections will have been through make and brake during manufacturing so the rig will not be required to do it; however most subs will not have been made and broke prior to delivery to the rig. Subs that have not been made and broke must be before they are used.
- A stabbing guide is highly recommended for use with the CDS connection. The use of a stabbing guide reduces the damage caused to the connection during stabbing, and makes the alignment process easier for the rig crew.
- The pipe should be turned slowly for the first turn to make sure the threads are aligned.
- Watch the break‐out torques of each connection. The break‐out torque should be no more than the make‐up torque. If the break‐out torque is higher than the make‐up torque, the connections were exposed to higher torque than the make‐up torque.
- When tripping out of the hole make sure to alternate the connections that are broken on stands so that all the connections wear evenly.
- Reinstall all thread protectors when laying down pipe.
- All make and break must be done at 15 RPM or less to lessen damage to box and pin connections.