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
Connected to the rotary table by four large steel pins that fit into mating holes in the rotary table
Kelly Bushing
Revolving or spinning section of the drillfloor that provides power to turn the drillstring in a clockwise direction (as viewed from above
Rotary Table
Consists of three or more steel wedges that are hinged together, forming a near circle around the drillpipe;
Slips
On the drillpipe side (inside surface), the slips are fitted with replaceable, hardened tool steel teeth that embed slightly into the side of the pipe.
Slips
Large-capacity, self-locking wrenches for grippin drillstring components and applying torque
Tongs
Rotary motion and power are transmitted through the kelly bushing and the kelly to the drillstring;
Rotary Table
Device used to grip the drillstring and suspend it in the rotary table when making or breaking a connection
Slips
Almost all rigs today have a rotary table, either as primary or backup system for rotating the drillstring
Rotary Table
While the tools are functionally identical, drilling sites typically have designated tongs for makeup and breakout
Tongs
As with opposing pipe wrenches for a plumber, the tongs must be used in opposing pairs
Tongs
are the active tongs during breakout (or loosening) operations;
Breakout tongs
are active during makeup (or tightening) operations.
Makeup tongs
A drillstring turning device
Top Drive or Power Swivel
Radically different from the more conventional rotary table system as it enables drilling to be done with three joint stands instead of single joints of pipe;
Top Drive or Power Swivel
It enables complete 90’ stands of pipe to be added to the string rather than the conventional 30’ singles.
Top Drive or Power Swivel
Consists of one or more motors (electric or hydraulic) connected with appropriate gearing to a short section of pipe called a quill, that in turn may be screwed into a saver sub or the drillstring itself
Top Drive or Power Swivel
Suspended from the hook, so the rotary mechanism is free to travel up and down the derrick
Top Drive or Power Swivel
