Rig lines used in petroleum

Rig lines 

   There are three types of Rig lines used in petroleum.

  1: Drill line.

  2: Sand line.

  3: calf or Casing line.

1: Drill line:

     In a drilling rig, the drill line is a multi-thread, twisted wire rope that is

    threaded or rived through in typically 6 to 12 parts between the traveling 

    block and crown block to facilitate the lowering and lifting of the drill string into

     and out of the well bore.

On larger diameter lines, traveling block loads of over a million pounds are possible.

To make a connection is to add another segment of drill pipe onto the top the drill string.

 A segment is added by pulling the Kelly above the rotary table, stopping the mud pump, 

hanging off the drill string in the rotary table, unscrewing the Kelly from the drill pipe below, 

swinging the Kelly over to permit connecting it to the top of the new segment

 (which had been placed in the mouse hole), and then screwing this assembly into the top 

of the existing drill string. Mud circulation is resumed, and the drill string is lowered into

 the hole until the bit takes weight at the bottom of the hole. Drilling then resumes.

2: Sand line:

         A wire line used on drilling rigs and well servicing rigs to operate a swab

                or baler, to retrieve cores or to run logging devices.

                        It is usually 9/16 of an inch (15 millimeters) in diameter and

                several thousand feet or meters long.

3: Calf or Casing line:

       Calf and Casing line is used for running the casing in well bore.

             Calf and Casing line is spooled on Calf wheel .Construction of

              Calf line is 6*25.