Normally Open Valve
Normally Open Valve.
Ball-throw internal pressure operated test tools, catalog page 35

Normally Open Valve

Circulating valve closed by dropping a ball — used for fluid replacement in acidizing

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Description

The normally open valve is a circulating valve whose circulating port is closed by dropping a steel ball into the tubing and applying tubing pressure. It is used as a fluid replacement valve in acidizing operations.

Features

  • During circulation, the shear pin keeps the circulating port open
  • After circulation, a ball is dropped into the tubing from the wellhead and liquid is pumped by a pump truck at a set rate and pressure to close the port; at the same time the steel ball is released and the tool returns to full opening
  • Once closed, the circulating port cannot be opened again

Specifications

Size, in [mm]3⅛ [79.4]3⅞ [98.4]3⅞ [98.4]5 [127]5 [127]
Working pressure, psi [MPa]15,000 [105]10,000 [70]15,000 [105]10,000 [70]15,000 [105]
No H2S——Available—Available
Full H2S above 175 °F—AvailableAvailableAvailableAvailable
Full H2SAvailableAvailableAvailableAvailableAvailable

Available: tool is ready to supply in this configuration. — : not ready to supply.

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