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Annular Circulating Sub
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Thru Tubing Technology
Annular Circulating Sub
The Hunting Annular circulation sub is run above a BHA and creates a flow path from the tubing into the annulus above so that fluid can be circulated above the tool string while running in hole.
Product summary
The Hunting Annular circulation sub is run above a BHA and creates a flow path from the tubing into the annulus above so that fluid can be circulated above the tool string while running in hole.
Once a ball is dropped on seat and pressure applied to shear out the ball seat a sleeve moves down, flow to the annulus is isolated and pressure can be applied down the tubing to the BHA.
• Ideally suited for the applications below
• Perforating operations utilizing pressure activated firing heads
• Hydraulic setting tool deployment
• Inflatable packer deployment
• Milling operations
Features
Allows circulation above a tool string from the tubing into the annulus
Equalizes pressure across the tool string while running in hole
Once ball seat is sheared communication between tubing and annulus is isolated in both directions
Benefits
Field redressable
Short make up length
Simple drop ball design to activate