What Is A Kelly Bar On A Drill Rig?
What Is A Kelly Bar On A Drill Rig?
Kelly bars are important components of the hydraulic rotary drilling rigs used to drill boreholes. They transfer the torque of the rotary drive and the crowd pressure of the crowd system concurrently to the drilling tool.
A Kelly bar is made up of two to five telescopic tubular pieces that are welded together with drive keys and lock recesses on their exterior surfaces.
A Kelly bar is a hydraulic or manual device used to turn the drill bit on a drill rig. It is inserted into the drill pipe and the drill bit is attached to the end. It is then turned to drill into the ground.
Kelly was named after Michael J. (King) Kelly, a Chicago baseball star (1880-1887) famed for his base running and lengthy slides,′′ according to the ′′Dictionary of Petroleum Exploration, Drilling, and Production′′.
A Kelly bar is a drilling tool used to screw the drill string into the ground. It is essentially a heavy metal bar with sharpened edges that attaches to the drill string. Once the Kelly bar is in place, the drill string is screwed into the ground, which in turn pulls the Kelly bar down into the ground.
How Does A Kelly Rig Work?
A Kelly rig is a rotary drilling tool that is used to drill through rock and soil. The kelly rig was invented in 185os and the rig uses a rotating drill bit to bore through the ground. The bit is attached to a long metal pipe called the Kelly.
The Kelly is rotated by a motor, which causes the drill bit to spin. The drill bit drills a hole in the ground, and the soil and rocks are removed by the rotating action of the bit. The Kelly rig is a very efficient drilling tool and is used in many drilling applications.
A Kelly is a long, threaded steel pipe that is used to screw down into the drill string, below the drill bit, to provide a drilling torque. It is also called a torque multiplier.
Types Of Kelly Bars
Kelly bars are classified as either friction kelly bars or interlocking kelly bars. Friction kelly bars get their name from the frictional contact formed between each element’s rails. Interlocking kelly bars, on the other hand, feature driving ribs that are welded with lock mechanisms to deliver the most torque to each scope.
Standard kelly bars are completely locked systems featuring a mechanical locking mechanism between each element and the outer bar, as well as a rotary drive.
Why Is It Called A Kelly Bar?
Kelly was named after Michael J. (King) Kelly, a Chicago baseball star (1880-1887) famed for his base running and lengthy slides,′′ according to the ′′Dictionary of Petroleum Exploration, Drilling, and Production′′.
Because steel was not as good as it is now, the kelly was continually hanging up in the kelly bushing. ′′Slide Kelly, Slide!′′ was a popular song for the great baseball star at the time.
′′Sliding′′ refers to the act of a kelly drilling through a kelly bushing.
Some argue that the term kelly is derived from the machine shop where the first kelly was created. It was in the old town of Kellysburg, Pennsylvania.
