Schlumberger

Blanking & Circulating Plugs, Standing Valves

Overview Library

Control flow in single and dual completions

Slickline-retrievable blanking plugs are available to hold differential pressure in the tubing string from above, below, or both. They can be used in low- or high-pressure applications with differential pressures up to 10,000 psi [69 MPa]. High-temperature seals for operating above 300 degF [149 degC] are also available. Some blanking plugs can be easily converted to equalizing standing valves or circulating plugs.

Hold pressure from above, allow flow from below

Equalizing standing valves are slickline-retrievable, ball-and-seat-type check valves designed to hold pressure from above, while allowing flow through the plug from below. They are used in intermittent gas lift wells to contain fluid in the tubing string during an injection cycle. Also used to set packers and test the tubing string, these valves can withstand differential pressures up to 10,000 psi from above at 300 degF. 

Hold pressure from below, allow pumping into formation

Circulating plugs hold pressure from below and allow flow from above. They are used to plug formation pressure in the tubing string while providing adequate flow area for pumping into the formation.

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