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Updated October 2016

Specialist Oil & Gas training courses from Oil & Gas experts

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4 - Drill String Connections

Identifying different thread types and differentiating between standard and premium threads can be quite difficult, but downtime can easily result when incompatible tools fail while in service or are lost in hole due to connections parting. In this course we look at ways to identify thread types and sizes and recognise any obvious defects, and we learn the importance of applying the correct torque to the make-up of these connections. The features of tool joints and the design elements that ensure a good, pressure tight seal when fully made up are also detailed, followed by an explanation of the forces acting on the connection.

Approximate duration: 45 minutes.

By the end of this module, you should be able to:

  • Identify the common features of tool joints,
  • Describe the difference between standard and premium connections,
  • List the various methods of identifying thread types, and
  • Explain the importance of properly torqueing a threaded connection.

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