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What is a Drill Collar?

What is drill collar

A drill collar is a device used at the lowest part of a drill string, an important part of the bottom hole assembly (BHA). It is always a ...

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Drill Pipe

Drill pipe, drill string

Dimensions and Strengths https://youtu.be/-IoTMZDJQIg Like other oilfield tubulars, drill pipe comes in a variety of lengths, diameters, weights and grades of steel. Drill pipe is also specified according to its upset (the type of end section provided for weld-on connections or tool joints). Factors that influence drill pipe selection include: Hole size Well …

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Kelly The Key to Efficient Operations

The kelly is a primary link between the drilling rig's surface equipment and the bit, and is therefore a critical component of the ...

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