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1. (WO2018048793) REAL TIME UNTORQUING AND OVER-TORQUING OF DRILL STRING CONNECTIONS

Pub. No.:    WO/2018/048793    International Application No.:    PCT/US2017/050061
Publication Date: Fri Mar 16 00:59:59 CET 2018 International Filing Date: Wed Sep 06 01:59:59 CEST 2017
IPC: E21B 44/04
E21B 17/042
E21B 47/12
Applicants: BAKER HUGHES, A GE COMPANY, LLC
Inventors: FORSTNER, Ingo
SCHOENBORN, Kai
RODERS, Ingo
Title: REAL TIME UNTORQUING AND OVER-TORQUING OF DRILL STRING CONNECTIONS
Abstract:
An apparatus for detecting over-torquing or un-torquing of a threaded connection between components in a borehole penetrating the earth includes: a string of components coupled in series by a threaded connection; a transmission line attached to each component; a signal coupler in communication with the transmission line and disposed on each component at each threaded connection, the signal coupler being configured to transmit the signal to an adjacent signal coupler on an adjacent coupled component in order to transmit a signal along the transmission line attached to the adjacent coupled component; a receiver configured to receive the signal; and a processor in communication with the receiver and configured to: (i) determine a difference between a characteristic of the signal and the characteristic of a reference signal and (ii) transmit an alert signal signifying that the threaded connection is over-torquing or un-torquing in response to the difference exceeding a threshold value.