Patent ID: 11905820
Assignee: SCIENTIFIC DRILLING INTERNATIONAL, INC.
Field: Civil engineering (Other fields)
Classification: CPC E  F | IPC E  F

Claim 7:
8. A method for tuning a downhole torsional damping device to match at least one desired downhole electronics, the downhole torsional damping device having a longitudinal axis and including an inertia element and a damping fluid or elastomer, comprising the steps of:
a) calculating a set of natural frequencies and mode shapes for the downhole electronics based on the mechanical properties of the downhole electronics, wherein the downhole electronics comprise a sensor, and wherein the downhole torsional damping device along with the downhole electronics together create a sensor string maintained in a centralized position inside a drill string;
b) selecting at least one desired frequency from the calculated natural frequencies;
c) tuning the damping device characteristics to match the at least one desired frequency; and
d) using the calculated mode shapes to place the damping device.