Patent ID: 11905826
Assignee: HALLIBURTON ENERGY SERVICES, INC.
Field: Measurement (Instruments)
Classification: CPC E  G | IPC E  G

Claim 20:
21. A method for calibrating a downhole tool, comprising:
disposing the downhole tool in a borehole, wherein the downhole tool comprises a first device and a second device;
transmitting a signal from a master module disposed on the first device to a module disposed on the second device;
transmitting a return signal from the module to the master module after a fixed time delay;
receiving the return signal with the master module;
determining Tdd of the time for the signal to travel from the master module to the module, wherein the Tdd=(Counter-Tf-T4-T3)/2, wherein the Counter is a time for the signal to travel from the master module to the module and back to the master module as measured by the master module, the Tf is the fixed time delay, the T4 is a master module signal detection time, and the T3 is a module signal detection time;
determining T2, wherein the T2=T3+(Tdd-T1), wherein the T2 is a time delay and the T1 is a time it takes for the signal to be transmitted and detected at the master module;
counting a number of transmitter clock ticks during the time for the signal to travel from the master module to the module and back to the master module; and
applying an error adjustment with the T2.