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TorqueMaster Anchor
The Baker Hughes TorqueMaster™ bottom-trip retrievable anchor is used to anchor a whipstock in the wellbore. It is an alternative to the packer/anchor assembly, and attaches to the lower end of the whipstock by means of a drillpipe thread. The bottom trip retrievable anchor is for use with the WindowMaster G2™ and the PathMaster™ window milling systems.
To activate the setting sequence, only a bottom restriction is required. This bottom can be in the form of a permanent or retrievable bridge plug, top of cement, liner top, or production packer. With the retrievable bottom-trip anchor, either the universal bottomhole orientation or the measurement-while-drilling orientation method can be used. The anchor is retrievable with straight overpull on the whipstock. For retrievable applications, a debris management system consisting of an EXCLUDER™ sub, unloader valve, and a shear-type disconnect should be run between the whipstock and the anchor. The debris management system keeps debris from falling around the anchor and possibly fouling the slips during retrieval.