Activation Flow Tool (AFT)
Communication
Gamma Ray
Neutron
SPECIFICATIONS
MAX TEMPERATURE
350°F (175 °C)
MAX PRESSURE
15,000 psi (103.4 MPa)
MAKE-UP LENGTH
13.9” (353 mm)
TOOL WEIGHT
6.6 lb (3 kg)
TOOL OD
1-3/8” (35 mm)
MIN HOLE DIAMETER
1-5/8” (41.3 mm)
MAX HOLE DIAMETER
9-5/8” (245 mm)
LOGGING SPEED
Preferable Stationary
REC BORE HOLE FLUID
ALL
TENSILE STRENGTH
15,432 lbf (7,000 kgf)
COMPRESSION STRENGTH
15,432 lbf (7,000 kgf)
TORQUE
3540.3 lbf.in (400 N.m)
DETAILS
The AFT uses a neutron generator to emit high energy neutrons into the surrounding environment of flowing water. The oxygen in the water is briefly transformed into an isotope of nitrogen and when this isotope decays back to oxygen, gamma rays are emitted. By spacing the tools’ 4 gamma ray detectors for the proper flow rates you expect to encounter, the AFT delivers a highly accurate water flow velocity. Knowing the well geometry you can also calculate volumetric flow rate. The AFT can measure flow in the tubing, in the annular space between the tubing and casing and even behind casing flow.
The measurement is sensitive enough to detect small flowrates, and can be con figured to measure up or down flow. It is particularly useful as a leak or channel detector.