The NTO houses, a sensitive hydrophone that is highly effective in the detection of flow inside and outside the cased well. The electronics digitises the noise downhole and sends a frequency spectrum to the surface to be recorded. Both the frequency spectrum and six high-pass frequency cuts are displayed on a log, providing a quantitative measurement of the downhole noise.
The NTO can be combined with other GE wireline tools and logs data in both memory or surface read out tool strings. Consequently, any cased hole logging intervention, such as production logging, cement evaluation or pipe inspection, becomes an opportunity to verify the integrity of downhole components at minimal additional cost.
Multiple NTO can be combined within a single toolstring, thereby making it possible to pinpoint the depth of any particular noise source effectively and efficiently. The NTO is typically run in combination with a Casing Collar Locator and Temperature tool as well as any other Ultrawire tool, including Gamma Ray, Pressure, Cement Bond, Calliper, Metal Thickness, or Production Log.
The NTO can be combined with other Wireline tools and logs data in either memory or surface read out tool strings.
Features & Benefits
- Evaluate flow profiles
- Locate channels behind a well case
- Locate gas-liquid interfaces
- Locate leaks in a well case
- Locate gas entries