Square or hexagonal hollow shaft of which one end engages the drilling table and the other end engages the drillpipe.
the heavy steel member, three-, four-, six-, or eight-sided, suspended from the swivel through the rotary table and connected to the topmost joint of drill pipe to turn the drill stem as the rotary table turns. It has a bored passageway that permits fluid to be circulated into the drill stem and up the annulus, or vice versa.
The square section of a rod which causes the rotation of the drill bit. Torque from a drive table is applied to the square rod to cause the rotary motion. The drive table is chain or gear driven by an engine. Found in: Water Treatment Plant Operation, Vol I & II Water Distribution System O&M Small Water System O&M
n: the heavy square or hexagonal steel member suspended from the swivel through the rotary table and connected to the topmost joint of drill pipe to turn the drill stem as the rotary table turns.
The first and sturdiest joint of the drill column; a thick-walled, hollow steel forging with two flat sides and two rounded sides. When fitted into the square hole in the rotary table will rotate the kelly joint and thence the drill column and drill bit. Attached to the top of the kelly is the swivel and mud hose.
Square or hexagonal steel pipe about 43 feet (13 meters) long which transmits torque from the rotary table to drill string, thus rotating the string and bit.
hexagonal or square pipe about 15m long attached to the top of the drill string and turned by the rotary table. It is used to transmit the twisting movement from the rotary machinery to the drill string and thus the bit.
The heavy steel, pipe-like, four- or six-sided member suspended from the swivel through the rotary table and connected to the top-most joint of drill pipe which turns the drill stem as the rotary table turns. It has a bored passageway that permits fluid to be circulated into the drill stem and up the annulus, or vice versa. Sometimes called kelly joint.
The heavy square or hexagonal steel pipe which goes through the rotary table and turns the drill string (also called grief stem).
A Kelly (also known as Kelly Forceps, Mosquito and Rochester) is a type of hemostat usually made of stainless steel. It is floor grade so it is not used for surgery. They come either curved or straight.