Pipeline intervention and isolation can be achieved using STATS patented BISEP™. The BISEP™ range provides double block and bleed isolation deployed through a single full bore branch or hot tap penetration.

This high integrity isolation is provided by a spherical dual seal plug which is deployed from a pressure competent launcher through an isolation valve and rotated towards the flow of pressure to be isolated.

The spherical head houses twin compression seals and provides a facility to bleed and monitor the intermediate annulus. The seal annulus port proves and monitors the seal integrity before and during intervention work. The BISEP™ head utilises the same compression seal technology as our Tecno Plug™ isolation tools.

The seals are activated by a hydraulic cylinder inside the plug which compresses the seals. The resultant radial expansion pushes the seals out to seal against the pipe bore. Further application of hydraulic pressure generates a rubber pressure in the seal elements which allows the annulus between the seals to be pressure tested. Line pressure acting against the tool pressure head maintains seal pressure creating a fail-safe feature providing actuation independent of the hydraulic system. The ejection load resistance is provided by the tool’s deployment head.

Once the BISEP™ is deployed and set in position the pipeline or valve maintenance / repair can take place safely and efficiently.