Mechanical and hydraulic set one trip whipstock system with retrievable anchors and packers, and open hole cementing or formation and packer type anchors, with optional face angles, to suit customer application. Mechanical set systems can be tripped and set using a false bottom such as cement or bridge plug. Whipstocks may be oriented and surveys made using MWD or UBHO subs with Gyro in particular if hole inclination is less than 3?.
McGarian TDC Limited is working on a no flow based survey tool for whipstock orientation which will eliminate the need to incorporate flow based circulating subs in the assembly, especially when using MWD tools for orientation. This survey tool will incorporate the through bore, which will enable the orientation of cementing whipstocks and cementing through the survey tool once orientation is complete.
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