A one-trip whipstock milling system is disclosed which allows for settingof a packer or plug which is run in as part of the bottomhole assembly, inconjunc-tion with orientation instrumentation, a whipstock, and a one-trip millingsystemconnected to the whipstock. The assembly is run-in the hole together andinsertedto the desired depth. With the orientation of the whipstock known from thedown-hole instrumentation, the preferred embodiment involves pressurization of thewell-bore to actuate the packer assembly. Having set the packer at the properorienta-tion and depth, the milling immediately begins and continues in a continuouseffortuntil the window is fully milled, at which point the milling equipment andorienta-tion equipment are withdrawn from the wellbore.
展开▼
