Abstract: A whipstock/bottom hole assembly (BHA) arrangement including a whipstock, a BHA, an interconnection arrangement releasably securing the whipstock to the BHA, a fluid flow configuration in the BHA, the configuration directed at the interconnection arrangement. A method for releasing a whipstock from a whipstock/bottom hole assembly (BHA) arrangement as in any prior embodiment including flowing fluid through the fluid configuration, eroding the interconnection arrangement with the fluid, and separating the whipstock from the BHA.

Abstract: A whipstock interconnection body including a whipstock interface, a bottom hole assembly (BHA) interface, the BHA interface including a feature configured to inherently grip the BHA. A whipstock interconnection body including a whipstock interface, a bottom hole assembly (BHA) interface, the BHA interface configured for attachment to a back surface of the whipstock. A whipstock/BHA assembly including a whipstock, a BHA, a whipstock interconnection body releasably securing the whipstock to the BHA, the whipstock interconnection body including a whipstock interface, a bottom hole assembly (BHA) interface, the BHA interface including a feature configured to inherently grip the BHA. A whipstock/BHA assembly including a whipstock, a BHA, a whipstock interconnection body releasably securing the whipstock to the BHA, the whipstock interconnection body including a whipstock interface, a bottom hole assembly (BHA) interface, the BHA interface configured for attachment to a back surface of the whipstock.

Abstract: A modular window mill assembly includes a mill body having a first connection feature and a second connection feature; a mill head having a cutting structure and an engagement feature, the engagement feature configured to matingly engage with the first connection feature of the mill body to replaceably secure the mill head to the mill body; and, a blade having a cutting structure and a coupling feature, the coupling feature of each blade respectively matingly coupled to the second connection feature to replaceably secure the blade to the mill body. The mill body, mill head, and the blade are formed separately from each other prior to assemblage together to form the window mill assembly.

Abstract: A whipstock interconnection body including a whipstock interface, a bottom hole assembly (BHA) interface, the BHA interface including a feature configured to inherently grip the BHA. A whipstock interconnection body including a whipstock interface, a bottom hole assembly (BHA) interface, the BHA interface configured for attachment to a back surface of the whipstock. A whipstock/BHA assembly including a whipstock, a BHA, a whipstock interconnection body releasably securing the whipstock to the BHA, the whipstock interconnection body including a whipstock interface, a bottom hole assembly (BHA) interface, the BHA interface including a feature configured to inherently grip the BHA. A whipstock/BHA assembly including a whipstock, a BHA, a whipstock interconnection body releasably securing the whipstock to the BHA, the whipstock interconnection body including a whipstock interface, a bottom hole assembly (BHA) interface, the BHA interface configured for attachment to a back surface of the whipstock.

Abstract: A whipstock/bottom hole assembly (BHA) arrangement including a whipstock, a BHA, an interconnection arrangement releasably securing the whipstock to the BHA, a fluid flow configuration in the BHA, the configuration directed at the interconnection arrangement. A method for releasing a whipstock from a whipstock/bottom hole assembly (BHA) arrangement as in any prior embodiment including flowing fluid through the fluid configuration, eroding the interconnection arrangement with the fluid, and separating the whipstock from the BHA.