US 11,994,021 B2
Downhole wire integrity and propagation delay determination by signal reflection
Imran Sharif Vehra, Kingwood, TX (US); Christopher Golla, Kingwood, TX (US); Matthew Chase Griffing, Kingwood, TX (US); and Zinovy B. Krugliak, Houston, TX (US)
Assigned to HALLIBURTON ENERGY SERVICES, INC., Houston, TX (US)
Appl. No. 16/963,460
Filed by HALLIBURTON ENERGY SERVICES, INC., Houston, TX (US)
PCT Filed Feb. 20, 2018, PCT No. PCT/US2018/018810
§ 371(c)(1), (2) Date Jul. 20, 2020,
PCT Pub. No. WO2019/164476, PCT Pub. Date Aug. 29, 2019.
Prior Publication US 2021/0047918 A1, Feb. 18, 2021
Int. Cl. E21B 47/12 (2012.01); E21B 19/18 (2006.01); G01R 31/11 (2006.01); G01V 3/18 (2006.01)
CPC E21B 47/12 (2013.01) [G01R 31/11 (2013.01); G01V 3/18 (2013.01); E21B 19/18 (2013.01)] 25 Claims
OG exemplary drawing
 
1. An apparatus comprising:
a first tool component,
a second tool component spaced apart from the first tool component;
a wire having a first termination point and a second termination point, the wire communicatively coupling the first tool component and the second tool component and having a characteristic line impedance, wherein:
the first tool component is coupled to a first termination point of the wire and the second tool component is coupled to a second termination point of the wire, the first termination point of the wire having a source impedance and the second termination point of the wire having a load impedance,
the first tool component includes a first impedance altering device and the second tool component includes a second impedance altering device, the first and second impedance altering devices configured to alter, for a first predetermined period of time, at least one of the source impedance and the load impedance sufficient to generate a characteristic signal reflection upon transmission of a signal along a length of wire between the first tool component and the second tool component,
the first tool component is configured to transmit a clock signal along the length of wire between the first tool component and the second tool component during the first predetermined period of time, and
wherein the first tool component is configured to receive one or more reflected clock signals reflected during the first predetermined period of time; and
a computing device coupled to the first tool component that identifies a propagation delay associated with the one or more reflected clock signals, wherein a measurement associated with at least one of the first tool component or the second tool component is corrected based on the identified propagation delay.