Drilling Safety Bypass Tool: Integrated Solution for Lost Circulation & Stuck Pipe
The Lost Circulation & Stuck Pipe Challenge
Conventional methods face critical limitations:
-PBL tools restrict flow path and block fishing/logging tools
-Multiple trips required for different operations
-Limited functionality in severe loss zones
-Inability to perform back-off when stuck
Our safety bypass tool delivers:
✅ Infinite bypass cycles with simple ball drop activation
✅ Full bore access when closed - no flow restrictions
✅ Integrated functions - circulation and back-off capability
✅ No tripping required between operations
Working Principle: Ball-Activated Control
Dual-Mode Operation Mechanism
Operation Mode | Activation Method | Flow Path | Function |
Normal Drilling | Pumps operating, no ball | Through main bore | Standard drilling |
Bypass Mode | Ball seated + pump pressure | Through side ports | Lost circulation control |
Back-off Mode | Special tool + pressure | Tool-specific path | Emergency disconnect |
Technical Specifications
Parameter | Specification |
Size Range | 4-3/4" to 9-1/2" OD |
Connection Types | API REG, IF, FH (all standards) |
Pressure Rating | 5,000psi / 10,000psi options |
Ball Seat Size | 1-1/2" to 3" diameter options |
Port Area | 200-400% of drill pipe ID area |
Materials | 4145HM, tungsten carbide seats |
Activation Pressure | 1,000-1,500psi above circulating |
Field Application Procedures
Lost Circulation Treatment
-Detect losses during drilling operations
-Drop activation ball through drill string
-Increase pump pressure to open bypass ports
-Pump LCM through side ports directly to loss zone
-Stop pumps to close ports when treatment complete
Fishing & Logging Operations
-Tools pass freely through full bore when closed
-No restrictions for overshot tools or logging instruments
-Immediate conversion back to drilling mode after operations
Stuck Pipe Back-off
-Activate emergency release mechanism
-Apply torque while maintaining pressure
-Disconnect at designated point in string
Retrieve upper section while leaving tool in hole
Operational Advantages
✅ Eliminate Tripping
Treat losses immediately without pulling out of hole
Save 18-24 hours per incident
✅ Full Functionality
Unrestricted bore for fishing and logging
Multiple treatment cycles without tool replacement
✅ Enhanced Safety
Quick response to well control situations
Built-in emergency disconnect capability
