The philosophy of the tool is to pressurize to shear off the latch,drive the cone downward,and push the reaming blade out of the coattail groove on the cone ...

• 现场试验结果表明,所研制的随钻扩眼工具原理正确、结构可靠,为提高完井质量、解决井下复杂情况等提供了一个新的技术手段。