Schlumberger Technology Corporation

Dale Wayne Clinton

Christopher Del Campo

Qingyan He

Augdon J Sampa

Kenneth R Goodman

Richard J Radtke

Richard J Radke

Kelly W Hagen

Feng Zhou

A calibration assembly is disclosed. In one embodiment, a calibration assembly calibrating a downhole formation evaluation tool includes a calibration base having a first geometry, a calibration insert including a first material and having a second geometry, and a second material having a third geometry and being different from the first material. The second geometry enables the calibration insert to receive the second material to form a first composite region, wherein the first and second materials and the second and third geometries are selected such that a calibration property of the calibration assembly apparatus substantially matches a corresponding calibration property of a third material. Additional apparatuses, devices, and methods are also disclosed.

Composite materials and calibration assemblies using the same

A method for communicating a signal to an instrument in a wellbore includes axially accelerating the instrument in a preselected pattern of acceleration. The predetermined pattern corresponds to the signal to be communicated. The axial acceleration of the instrument is detected, and the signal is decoded from the detected axial acceleration. A signal detection system for an instrument in a wellbore includes an accelerometer oriented along a longitudinal axis of the instrument and means for comparing measurements made by the accelerometer to at least one predetermined pattern.

Method and apparatus for communicating signals to an instrument in a wellbore

Example composite materials and calibration assemblies using the same. An example calibration assembly for use in calibrating a downhole formation evaluation tool includes a first body comprising a first material and having a first geometry, a second body comprising a second material formed to receive the first body, wherein the first and second materials and the first geometry are selected so that a calibration property of the calibration assembly substantially matches a corresponding calibration property of a third material.

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Sugar Land, TX, United States of America

Dale Wayne Clinton