Abstract: A downhole recording device includes a housing centralizer, a housing, at least one radial connector connecting the housing to the housing centralizer, and an annular space between the housing centralizer and housing. The housing centralizer has a first end and a second end with a longitudinal opening through the housing centralizer from the first end to the second end. The housing is positioned radially within the longitudinal opening. The housing is configured to receive a downhole sensor. The annular space is located in the longitudinal opening of the housing centralizer and allows fluid communication from the first end of the housing centralizer to the second end of the housing centralizer.

Abstract: A technique facilitates collecting data, related to a fracturing, run-in-hole, or pull-out-of hole operation. A frac plug is provided with electronics for obtaining the desired information related to the operation. For example, the frac plug may be constructed with electronic sensors, a digital storage device, and a power supply or other power related equipment. Depending on the application, the frac plug may be a composite frac plug, degradable frac plug, dummy frac plug, or other suitable frac plug. Retrieval of the information obtained may be done via coupling with an associated device, e.g. inductive or physical coupling, by utilizing a broadcast transmitter/receiver, by physical retrieval of the storage device, or by physical retrieval of the dummy frac plug.

Abstract: A downhole recording device includes a housing centralizer, a housing, at least one radial connector connecting the housing to the housing centralizer, and an annular space between the housing centralizer and housing. The housing centralizer has a first end and a second end with a longitudinal opening through the housing centralizer from the first end to the second end. The housing is positioned radially within the longitudinal opening. The housing is configured to receive a downhole sensor. The annular space is located in the longitudinal opening of the housing centralizer and allows fluid communication from the first end of the housing centralizer to the second end of the housing centralizer.