Bell hole:

Terms Related to Bell hole

• Bell nipple

  A short length of pipe (a nipple) installed on top of the blowout preventer. The top end of the nipple is flared, or belled, to ...

• Fill-up line

  The smaller of the side fittings on a bell nipple, used to fill the hole when drill pipe is being removed from the well.

• Pilot hole

  In pipeline construction, the hole drilled as the first step of a directionally drilled river crossing. It establishes a pathway for the pipeline.

• Rathole

  1. A hole in the rig floor, 30 to 35 feet (9 to 11 meters) deep, which is lined with casing that projects above the ...

• Shear ram

  The component in a blowout preventer that cuts, or shears, through drill pipe and forms a seal against well pressure. Shear rams are used in ...

• Slim-hole drilling

  Drilling in which the size of the hole is smaller than the conventional hole diameter for a given depth. This decrease in hole size enables ...

• Straight hole

  An essentially straight hole with less than 5o total deviation from surface to bottom hole and dogleg severity less than 3o/100 ft.