drill eng rotary Flashcards
Used to rotate the drillstring, therefore, the drillbit
Rotary System
Includes all equipment used to achieve bit rotation; consists of rotary table, Kelly, and the swivel;
Rotary System
Modern drilling rigs use the top drive system
Rotary System
2 kinds of rotary system
Rotary Table System
Top Drive System
The mechanical device suspending the drillstring’s weight;
Swivel
Designed to allow drillstring rotation
Swivel
Allows the circulation of high-pressure drilling fluids while the drillstring is rotating
Swivel
Long square or hexagonal steel bar with a fluid path drilled through the center
Kelly
Transmits rotary motion from the rotary table or kelly bushing to thedrillstring, while allowing the drillstring to be lowered or raised during rotation
Kelly
Goes through the kelly bushing, which is driven by the rotary table
Kelly
While the tools are functionally identical, drilling sites typically have designated tongs for makeup and breakout
Kelly Saver Sub
Screwed onto the bottom of the kelly or topdrive and onto the rest of the drillstring;
Kelly Saver Sub
Has an inside diameter profile that matches that of the kelly, usually square or hexagonal
Kelly Bushing
Serves as a sacrificial element between the drill string and Top Drive or Kelly, reducing any unwanted repair and
Kelly Saver Sub
Adapter connecting the rotary table to the kelly
Kelly Bushing