Closing ratio:

Terms Related to Closing ratio

• Opening ratio

  The ratio between the pressure required to open the preventer and the well pressure under the rams.

• Close in

  1. To shut in a well temporarily that is capable of producing oil or gas. 2. To close the blowout preventers on a well to ...

• Blowout preventer control unit

  A device that stores hydraulic fluid under pressure in special containers and provides a method to open and close the blowout preventers quickly and reliably. ...

• Blowout preventer operating and control system

  The assembly of pumps, valves, lines, accumulators, and other items necessary to open and close the blowout preventer equipment. Also called closing unit.

• Blowout preventer rams

  The closing and sealing components of a preventer, like the gate in a gate valve.

• Ram blowout preventer

  A blowout preventer that uses rams to seal off pressure on a hole that is with or without pipe. Also called a ram preventer.

• Shear ram preventer

  A blowout preventer that uses shear rams as closing elements.