Torque&Drag in a drillpipe (Johancsik, 1984)

  • Thread starter Ekaterina Wiktorski
  • Start date
In summary, torque and drag in a drillpipe are the forces that resist its movement and rotation during the drilling process. These forces are important to consider as they can significantly impact the efficiency and success of drilling operations. Factors such as drillpipe weight, wellbore angle, drilling fluid properties, and obstructions can contribute to torque and drag. To manage and reduce these forces, specialized tools, optimal drilling fluid properties, and careful monitoring and adjustment of drilling parameters can be used. Excessive torque and drag can lead to increased costs, equipment failures, and potentially dangerous situations for the drill crew, and in extreme cases, the abandonment of the wellbore.
  • #1
Ekaterina Wiktorski
5
0
Hi! Is anyone experienced With T&D calculations using above mentioned model:
upload_2016-3-22_11-14-21.png
upload_2016-3-22_11-13-14.png
?
I have a trouble to understand what exactly F1 is and how to calculate it. I know it is an axial force, so it is drag? And once you calculate drag for one element, you use it as F1 to calculate drag in 2ns element, is it correct?
 

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Page 22 in vdPoll thesis An investigation of the stress-strain behaviour of a GRE cylindrical structure used for a drilling-with-casing application and its influence on torsional vibrations
 

1. What is torque and drag in a drillpipe?

Torque and drag in a drillpipe refer to the resistance or force that is experienced by the drillpipe as it rotates and moves down the wellbore during the drilling process.

2. Why is torque and drag important in drilling operations?

Torque and drag can significantly affect the efficiency and success of drilling operations. High levels of torque and drag can cause the drillpipe to become stuck or damaged, resulting in costly delays and potential wellbore instability.

3. What factors can contribute to torque and drag in a drillpipe?

There are several factors that can contribute to torque and drag in a drillpipe, including the weight and length of the drillpipe, the angle of inclination of the wellbore, the type and properties of the drilling fluid used, and the presence of any obstructions or tight spots in the wellbore.

4. How can torque and drag be managed and reduced in a drillpipe?

There are various techniques and strategies that can be used to manage and reduce torque and drag in a drillpipe. These include using specialized tools such as centralizers and torque-reducing devices, optimizing the drilling fluid properties, and carefully monitoring and adjusting the drilling parameters.

5. What are the consequences of excessive torque and drag in a drillpipe?

Excessive torque and drag can lead to various issues and complications during drilling operations. These can include increased drilling time and costs, equipment failures, and potentially dangerous situations for the drill crew. In extreme cases, it can even result in the abandonment of the wellbore.

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