发明名称 |
Downhole Sensing Systems and Methods Employing Squeezed Light Interferometry |
摘要 |
An illustrative downhole sensing system includes a phase-squeezer assembly, an interferometer with a downhole sensor on the sensing path, and a receiver. The phase squeezer assembly provides a phase-squeezed laser beam, preferably with a squeeze parameter greater than 2. Certain embodiments include a pulse generator that gates the phase-squeezed laser beam to form a sequence of phase-squeezed laser pulses, and may further include a compensator that converts the sequence of pulses into a sequence of double pulses with a slight frequency shift between the pulses in each pair. The interferometer conveys a reference portion of the phase-squeezed laser beam along a reference path and a sensing portion of the phase-squeezed laser beam along a sensing path. A downhole sensor along the sensing path provides the sensing portion of the phase-squeezed laser beam with a measurement-parameter dependent phase shift relative to the reference portion of the phase-squeezed laser beam, which is measured by the receiver. |
申请公布号 |
US2017009571(A1) |
申请公布日期 |
2017.01.12 |
申请号 |
US201415116499 |
申请日期 |
2014.02.28 |
申请人 |
HALLIBURTON ENERGY SERVICES, INC. |
发明人 |
Bhongale Satyan G.;Stokely Christopher L. |
分类号 |
E21B47/12;G01V8/16;E21B47/01;G01B9/02;E21B47/06;E21B47/14 |
主分类号 |
E21B47/12 |
代理机构 |
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代理人 |
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主权项 |
1. A downhole sensing system that comprises:
a phase squeezer assembly that provides a phase-squeezed laser beam; an interferometer that directs a reference portion of the phase-squeezed laser beam along a reference path and a sensing portion of the phase-squeezed laser beam along a sensing path; a downhole sensor along the sensing path to provide the sensing portion of the phase-squeezed laser beam with a measurement-parameter dependent phase shift relative to the reference portion of the phase-squeezed laser beam; and a receiver that measures said phase shift. |
地址 |
Houston TX US |