Tag Archives: Drill String Design

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 …