Barrier －A reliable and verifiable pressure-control method used to prevent a well from flowing.

Verify and test barriers
example 1

•       PXX plug

–     Test in direction of flow. Run PXX plug with pressure.

•       Test at least 1000 psi differential from below. Check fluid volume after bleeding off pressure.

–     Test time:

•       Minimum 10 mins with incompressible fluid.

•       Minimum 30 mins with compressible fluid.

Verify and test barriers
example 2

•       Two-way check valve

•       Tested in flow direction by using lubricator to install it.

•       Test at least 1000 psi differential from below. Check fluid volume after bleeding off pressure.