G - Physics – 01 – N
Patent
G - Physics
01
N
G01N 21/41 (2006.01) E21B 47/10 (2006.01) G01N 21/43 (2006.01) G01N 21/85 (2006.01) G01V 8/16 (2006.01)
Patent
CA 2205746
To discriminate optically between the various phases in a three-phase fluid, a light beam (F) of non-zero divergence is injected into a detector block (10) made of a material whose refractive index is greater than the refractive indices of all three phases of the fluid. The block (10) has a sensitive zone (18) and a total reflection zone (20) such that incident rays (Ri) parallel to the axis (12) of the block strike the sensitive zone (17) at an angle of incidence (.theta.i) and are returned parallel to the axis (12) by the total reflection zone (20). The angle of incidence (.theta.i) is such that a first phase gives rise to almost total reflection, a second phase gives rise to almost total transmission, and a third phase gives rise to partial transmission and partial reflection.
Schlumberger Canada Limited
Smart & Biggar
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