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BISEP Isolation Tools
BISEP Isolation Tools for Sale from PAPS

BISEP Isolation Tools for Sale from PAPS 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.


• Pipeline / launcher valve installation or replacement
• Pipeline / Riser inspection, repair, replacement or decommissioning
• Rerouting of process flow
• Mid-line pipeline repair due to anchor drags or a dropped object on the pipeline
• Isolate pressure vessels
• Water or gas injection line isolation
• Isolation of pipeline end manifolds, pipeline end terminals, subsea manifolds or skids for repair, upgrade or replacement.

Operator Benefits:

Fully verifiable Double Block & Bleed isolation through single intervention point:

• Dramatically increases safety over traditional line stop technology
• Single operation significantly reduces costs. (Single fitting, welding, inspection, scaffolding, crane and excavation costs)
• Single operation significantly reduces workscope timescales, resulting in reduced shut-down time
• Single fitting allows installation in restricted access piping
• Reduced inspection / quality control / hot work permits (single fitting)
• BISEP™ technology complies with operator double block and bleed requirements
• Minimised production disruption on interconnected pipeline networks during valve repairs / tie-ins etc.

Key Features:

• Annular bleed port proves and monitors the seal integrity before and during any intervention work
• Isolation integrity monitored through annulus, hydraulic set circuit and body vents continuously
• Design provides axial restraint through bearing on dual clevis plates (no single point failure)
• Seal annulus bleed provides Zero Energy Zone
• Dual compression seals are more compliant and have a far higher success rate than traditional cup seals particularly in pitted pipework
• Self Energisation of seals maintains isolation integrity independent of hydraulic control circuit
• Negates the need for additional taps for bleed
• Can accommodate reinstatement pressure test
• BISEP™ isolation installed upstream of fitting, maintaining fitting in safe zone during workscope
• BISEP™ launcher ported to facilitate venting, purging and flushing of isolated section
• Can be deployed through conventional equal tee / clamp / branch. Key Features:


• Size range: 3” – 36”
• For sizes 2" and below see STATS BI-STOP™ range
• Pressure range: up to 150 bar (+2100psi)
• Design allows for deployment in high flow conditions


Technical Data Sheet
BISEP Isolation Tools for Sale from PAPS

Please Contact Us for a complete list of available sales equipment.

Also available:

BISEP Isolation Tools, Bolt Tensioning Tools, Bolt Torquing Tools, Electric and Diesel Motors, Epoxy Sleeves, Flange Splitters, Flange Testers, Hot Tap Tools & Clamps, Hydraulic Hose Winches, Hydraulic Shackles, Impact Hammers (used), Internal Lifting Tools, Joint Testers, Kamos Actuators, Kamos Gaskets, Mass Flow Excavators, Nut Splitters, Pipe Cutting Tools, Pipe Handling Tools, Pipe Plugs (Oil & Gas Industry), Pipe Wrap both Subsea & Above Water, Pipeline Clamps, Pipeline Connectors, Pipeline Engineering, Pipeline Inspection Tools, Pipeline Isolation Tools, Reconditioned Pumps, Remotely Operated Isolation Plugs, Tethered Isolation Plugs, Valves, Vibratory Hammers (new), Vibratory Hammers (used), Weightcoat & Coating Removal Tools, Weld Testers.
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