Patent ID: 8400160
Filing Date: 2013-03-19
Classification: E21B,G01V

Abstract:
1. A lateral resistivity sensor disposed in a first recess in a tubular having a longitudinal axis and adapted for subsurface disposal, comprising: an insulating base layer disposed in the first recess; a toroidal antenna disposed over the insulating base layer; a fluid barrier disposed over the toroidal antenna and in a second recess, wherein the second recess is continuous with or shares a boundary with the first recess; a mechanical, contact-protective shield disposed over the first recess, the second recess, and a third recess, the mechanical, contact-protective shield having a first end and a second end, the first end being attached to the tubular, the second end not being in direct physical or electrical contact with the tubular; and an electrical insulator, at least a portion of the electrical insulator being disposed in the third recess between the second end of the shield and the tubular, but not in the first recess nor in the second recess, and wherein the third recess is neither continuous with nor shares a boundary with the first or second recesses.