| US 7,475,593 B2 | ||
| High temperature near infrared for measurements and telemetry in well boreholes | ||
| Richard Odom, Benbrook, Tex. (US) | ||
| Assigned to Precision Energy Services, Inc., Fort Worth, Tex. (US) | ||
| Filed on Jun. 24, 2005, as Appl. No. 11/166,879. | ||
| Prior Publication US 2006/0288769 A1, Dec. 28, 2006 | ||
| Int. Cl. E21B 47/01 (2006.01); G01S 17/02 (2006.01) | ||
| U.S. Cl. 73—152.55 [73/152.03; 73/152.05; 73/152.18; 73/152.21; 73/152.29] | 21 Claims |
| 1. Apparatus for measuring a property of a borehole environs, the apparatus comprising:
(a) a pressure housing;
(b) at least one reflectance assembly comprising
(i) a lens hermetically sealed within a wall of said pressure housing,
(ii) an IRED disposed within said pressure housing and optically coupled to said lens, and
(iii) a PD disposed within said pressure housing and optically coupled to said lens, wherein said PD responds to radiation
emitted by said IRED and reflected from said borehole environs; and
(c) said property is determined from said response; wherein
(d) said lens of said at least one reflectance assembly contacts a borehole wall of said borehole environs, wherein resolution
of said response is defined by an area of said lens and said borehole contact.
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