• fishing

    Fishing Equipment

    Fishing Operations and Equipment A fish is a part of the drill string that separates from the upper remaining portion of the drill string while the drill string is in the well. This can result from the drill string failing mechanically, or from the lower portion of the drill string becoming stuck or otherwise becoming disconnected from drill string upper portion. Such an event will instigate an operation to free and retrieve the lower portion (or fish) from the well with a strengthened specialized string. Junk is usually described as small items of non-drillable metals that fall or are left behind in the borehole during the drilling, completion, or workover operations.…

  • Drilling Rotating Equipment

    Drilling Rotating Equipment

          Rotating system: the figure indicate the comparative sizes of the drill pipe and drill collar. Swivel ♦ The swivel hangs from the drilling hook by means of large bail, or handle. The swivel is not rotate, but allow everything below it to rotate. ♦ Drilling fluid is introduced into the drill stem through a gooseneck connection on the swivel, which is connected to the rotary hose. Power Swivel ♦ When a ‘top-drive’ system is used, the swivel is replace by power swivel. ♦ The power swivel performs the same functions as the ‘normal swivel’, but it is also associated with a transmission system used to rotate the…