Snatch block:

Terms Related to Snatch block

• Hay pulley

  A pulley that is normally attached to the wellhead at a convenient place for the wireline to pass through as it comes from the stuffing ...

• Sheave

  A grooved pulley.

• Block

  An assembly of pulleys on a common framework; in mechanics, one or more pulleys, or sheaves, mounted to rotate on a common axis. The crown ...

• String up

  To thread the drilling line through the sheaves of the crown block and traveling block. One end of the line is secured to the hoisting ...

• Traveling block

  An arrangement of pulleys, or sheaves, through which drilling line is reeved and which moves up and down in the derrick or mast. See block.

• Impression block

  A block with lead or another relatively soft material on its bottom. It is made up of drill pipe or tubing at the surface, run ...

• Sky-top mast

  A mast on a well servicing unit that utilizes a split traveling block and crown block, which makes it possible to pull 60-foot stands with ...