HWDP is an intermediate-weight drill string member with drill pipe dimensions for easier handling. Its heavy wall tube is attached to speci...

The primary function of the drill collars is to provide sufficient WOB (Weight on bit). The weight of the collars also ensures that the dri...

Rotary Assemblies, as the name suggests, the assemblies which are driven by rotary table at the surface. Actually these are the bottom hole ...

Here I am going to discuss about the Pendulum Effect, its mechanism and the forces acting, thus causing the drill bit along with active stri...

The drill collar moment theory states that when a bit drills from a soft formation to an inclined hard formation, it will support a great po...

HENRY WOODS & ARTHUR LUBINSKI'S THEORY Henry Woods and Arthur Lubinski stated in 1954 that the size of drill collar just above the ...

Here are the links of some of the useful softwares and spreadsheets I have collected from various websites which are available for FREE DOWN...

Horizontal And Directional Drilling - Richard S. Carden RICHARD S. CARDEN  has taught drilling, horizontal drilling and underbalanced dr...