Abstract: A well tool assembly can include a well barrier and a detachable sub connected to the well barrier. The detachable sub can include a sensor data receiver. A method of retrieving sensor data can include positioning a sensor on one side of a well barrier, connecting a detachable sub on an opposite side of the well barrier, the detachable sub including a sensor data receiver configured to receive sensor data from the sensor, and conveying the well barrier, the sensor and the detachable sub together into a well. A system can include a sensor, a detachable sub, and a well barrier positioned between the sensor and the detachable sub, the detachable sub including a sensor data receiver, a passage extending longitudinally through the detachable sub, and a closure that selectively opens and blocks the passage.

Abstract: A well tool assembly can include a well barrier and a detachable sub connected to the well barrier. The detachable sub can include a sensor data receiver. A method of retrieving sensor data can include positioning a sensor on one side of a well barrier, connecting a detachable sub on an opposite side of the well barrier, the detachable sub including a sensor data receiver configured to receive sensor data from the sensor, and conveying the well barrier, the sensor and the detachable sub together into a well. A system can include a sensor, a detachable sub, and a well barrier positioned between the sensor and the detachable sub, the detachable sub including a sensor data receiver, a passage extending longitudinally through the detachable sub, and a closure that selectively opens and blocks the passage.

Abstract: An article of manufacture and methods for making the same are disclosed. The article includes a unit of fabric that has been softened by being at least partially submerged in geothermal water from an unprocessed natural source, the geothermal water having a temperature in a range of 120 degrees Fahrenheit to 160 degrees Fahrenheit, and having a mineral content comprising calcium in a range of 100 mg/L to 150 mg/L, sodium in a range of 800 mg/L to 1200 mg/L, and bicarbonate in a range of 250 mg/L to 500 mg/L, such that the geothermal water has a mineral hardness as measured by a content of calcium carbonate in a range of 350 mg/L to 500 mg/L. The submerging includes exposing the unit of fabric to the water in one or more cycles, each of the one or more cycles having a duration of between 1 and 6 hours, sufficient to impart a partial breakdown of fabric fibers of the unit of fabric to render the softening of the unit of fabric.