A well-designed drill string is instrumental in optimizing penetration rates, controlling wellbore deviation, maintaining an "in gauge" ...

Drill String Design As inclination angle increases in a directional or horizontal well, the borehole walls support more of the drill string weight. This contact, along with the capstan effect (the normal force caused by the deformation of an axially loaded member about some obstacle), results in frictional forces that oppose the …

Drilling Directional Wells Underbalanced The main justifications for drilling a directional well underbalanced are to (1) reduce drilling costs, and/or (2) improve productivity. The combination of horizontal/multilateral and UBD technology is a relatively new one, and which has been explored more in international fields (especially the Middle East), than in …

One of a drilling fluid's primary functions is to remove drilled cuttings and transport them to the surface-in other words, to clean the hole. The term carrying capacity ...

Horizontal drilling is the process of directing part of a well course through a reservoir such that its inclination angle is approximately 90° from vertical.

Directional Drilling Tools and Techniques: The planning, equipment and procedures involved in drilling non-directional wells also apply ...

the exact causes of wellbore deviation are unknown, we can list the following as contributing factors: • Formation type ( lithology, ...

Directional drilling is the practice of accessing an underground oil or gas reserve by drilling in a non-vertical direction. Directional...

After completing this topic "Cement Evaluation", you will be able to: • Summarize methods for evaluating quality of a cement bond.

After completing this topic "Plug Cementing", you will be able to: • Define plug cementing and associated terms...