Kelly is the main driver of the whole drill string.It transmits torsional energy from the rotary table through the drill string to the bit at the bottom of the hole. Kelly is a long square or hexagonal.precision machined heavy steel bar that is supported by the swivel through the rotary table and is connected to the first joint of drill pipe in the drill string.
Straightness of the kelly is very crucial in the manufacturing process, thus straightness inspection are carried out before, during and after each machining operation. The flats are precision-milled to API specification.All milling processes are performed on specially designed rigid kelly mills to ensure tight tolerances and high quality drive section.Each kelly is furnished with a pressed steel thread protectors.
The Rotary Hammer(https://www.aolitools.com/product/rotary-hammer/1050w-high-speed-2-functions-28mm-safety-clutch-rotary-hammer.html) motor uses a unique double-hook winding, which is the time that 26 electric hammers are used on the market (this process is only limited to ...
This Square floor-standing glass spigot The bottom of this square spigot is equipped with adjustable spacers, which can be convenient for workers to install when the ground is not level, the maximum adjustable height of 12mm, the maximum adjustable tilt angle of 7°. Welcome to ...