Abstract: A method of cleaning a well includes flowing well fluid within the well while running a cleaning tool into the well, injecting the well fluid with a fluid thickening agent through multiple nozzles of the well cleaning tool to form thickened well fluid, dislodging metallic debris and non-metallic debris accumulated along a wall of the well with multiple brushes of the cleaning tool, carrying the non-metallic debris out of the well with the thickened well fluid, and capturing the metallic debris at a capture device of the cleaning tool.

Abstract: Systems and methods include a computer-implemented method for predicting fluid holdups along the borehole or the pipe on surface and to perform fluid typing and fluid properties characterization. Acoustic waves are transmitted by an array of acoustic wave transducers. Each transducer is configured to transmit acoustic waves at a different frequency. The acoustic waves are received by an array of acoustic wave receivers fixed on the bow centralizer on the tool used in the borehole. Each receiver is configured to receive only the given frequency of a given transducer, forming a receiver-transducer pair for the given frequency. Acoustic speeds measured at each given frequency and analyzed. A model is generated based on the analyzing. The model is configured to predict fluid holdups across the borehole and to perform fluid typing and fluid properties characterization in one phase, two phase, and three phase applications of gas, oil, and water.

Abstract: A well cleaning tool includes a positioning device configured to control a position of the well cleaning tool within a well, a rotatable brush assembly configured to scrape a wall of the well, a capture device configured to catch debris dislodged from the wall by the rotatable brush assembly, and a fluid delivery assembly configured to deliver a cleaning fluid to the well.

Abstract: A well cleaning tool includes a positioning device configured to control a position of the well cleaning tool within a well, a rotatable brush assembly configured to scrape a wall of the well, a capture device configured to catch debris dislodged from the wall by the rotatable brush assembly, and a fluid delivery assembly configured to deliver a cleaning fluid to the well.

Abstract: A method of cleaning a well includes flowing well fluid within the well while running a cleaning tool into the well, injecting the well fluid with a fluid thickening agent through multiple nozzles of the well cleaning tool to form thickened well fluid, dislodging metallic debris and non-metallic debris accumulated along a wall of the well with multiple brushes of the cleaning tool, carrying the non-metallic debris out of the well with the thickened well fluid, and capturing the metallic debris at a capture device of the cleaning tool.

Abstract: Systems and methods include a computer-implemented method for predicting fluid holdups along the borehole or the pipe on surface and to perform fluid typing and fluid properties characterization. Acoustic waves are transmitted by an array of acoustic wave transducers. Each transducer is configured to transmit acoustic waves at a different frequency. The acoustic waves are received by an array of acoustic wave receivers fixed on the bow centralizer on the tool used in the borehole. Each receiver is configured to receive only the given frequency of a given transducer, forming a receiver-transducer pair for the given frequency. Acoustic speeds measured at each given frequency and analyzed. A model is generated based on the analyzing. The model is configured to predict fluid holdups across the borehole and to perform fluid typing and fluid properties characterization in one phase, two phase, and three phase applications of gas, oil, and water.