Backoff String Shot
Explosive back-off tool used to help release a threaded connection in stuck drillpipe after the free point has been determined.
The Backoff String Shot supports stuck-pipe recovery by helping release a selected threaded connection. It is used after the free point has been determined and the tool has been correlated to the required depth.
The tool delivers an explosive impulse at the connection while left-hand torque is applied to the drill string, helping the connection unscrew. The explosive loading is selected to suit the well conditions.
The assembly can be positioned directly below a freepoint tool with fire-through capability.
Key features
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Explosive back-off of threaded drillpipe connections
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Loading configured to suit well conditions
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Can be combined with a freepoint tool with fire-through capability
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Tool outside diameter of 1-11/16"
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Pressure rating of 10,000 psi
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Temperature rating of 150°C for one hour
Applications
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Stuck drillpipe recovery
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Back-off of selected threaded connections
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Recovery operations following free-point determination
Contact our team to discuss the Backoff String Shot for your pipe recovery requirements.
Related products
Free Point Indicator Tool
Electromechanical tool for locating the free point in stuck tubing, drillpipe or casing by measuring stretch or response to applied torque.
Standby Pipe Recovery
Project-specific pipe recovery package positioned on the rig before drilling, reducing mobilisation delays if pipe or the BHA becomes stuck.
Performance in practice
Applied across well intervention operations.