Abstract: A dynamic underbalance sub for use in a wellbore may include a sub housing, a first chamber provided in an interior of the sub housing, an opening extending through the sub housing and configured such that the first chamber is in fluid communication with an exterior of the sub housing, a second chamber provided in the interior of the sub housing, and a pressure-isolating wall provided between the first chamber and the second chamber.

Abstract: A control module for use with a plurality of wellbore tools may include a power source and a logic circuit operably coupled to the power source. The logic circuit may be operably coupled to the plurality of wellbore tools through a topmost wellbore tool of the plurality of wellbore tools. The logic circuit may be configured to, in response to an initiation condition and for each wellbore tool of the plurality of wellbore tools in a sequential order from a bottommost wellbore tool to the topmost wellbore tool, determine whether the wellbore tool is a responsive wellbore tool or a non-responsive wellbore tool. In response to a determination that the wellbore tool is a responsive wellbore tool, the logic circuit may initiate the wellbore tool. In response to a determination that the wellbore tool is a non-responsive wellbore tool, the logic circuit may skip initiation of the wellbore tool.

Abstract: A dynamic underbalance sub for use in a wellbore may include a sub housing, a first chamber provided in an interior of the sub housing, an opening extending through the sub housing and configured such that the first chamber is in fluid communication with an exterior of the sub housing, a second chamber provided in the interior of the sub housing, and a pressure-isolating wall provided between the first chamber and the second chamber.

Abstract: An autonomous logging drone tool-string including a wiper plug at a downstream end, a logging tool, and a detachable transmitter capsule, and associated methods for cementing a wellbore and logging wellbore information in a single tool-string run downhole. In an aspect, the logging drone tool-string may include a perforating gun and associated methods may include perforating a toe end of the wellbore casing and surrounding cement. In an aspect, the transmitter capsule stores wellbore information from the logging tool. The transmitter capsule may be detached, pumped to the surface, and retrieved for accessing the stored wellbore information.