Ball-Drop Cemented Initiation Sub: Test Liner Pressure Integrity Prior to Stimulation

Ball-Drop Cemented Initiation Sub


Tartan’s Ball-Drop Cemented Initiation Sub (Ball-Drop CIS) is a modification of Tartan’s successful patented Cemented Initiation Sub. The Ball-Drop CIS incorporates a ball seat just above the standard BurstPoint™ ports. After the cement job is complete and communication is re-established, the ball seat gives the customer the ability to test the liner pressure integrity by dropping a dissolvable ball from surface.


  • Simple, reliable and rugged design for cemented liner installations
  • Provides ability to pressure test the liner prior to stimulation operations
  • Eliminates coiled tubing and perforating costs for first stage initiation in plug-and-perf operations
  • Can also be used as a flow path to initiate Tartan’s cemented MultiFrac™ or EnerFrac™ ball-drop systems
  • Can pump full stimulation treatment through BurstPoint ports for first stage stimulation after ball dissolves

Features and Benefits

  • Provides increased operational efficiency resulting in reduced costs
  • BurstPoint ports within the CIS can be sized to control the stimulation fluid rate
  • Full drift inside diameter (ID) – no drill out required
  • No special cementing procedures required
  • Surface pressure indication is an accurate monitor of BurstPoint port opening
  • Industry-proven dissolvable ball

Tartan Energy Group Case Studies

At Tartan Energy Group, we design our tools with reliability, flexibility, and simplicity in mind. To learn more about the successful application of our completion technologies, please read our case studies.

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