The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 17, 2025
Filed:
Feb. 24, 2020
Applicant:
Expro North Sea Limited, Aberdeen, GB;
Inventor:
Julian Richard Trinder, Southampton, GB;
Assignee:
EXPRO NORTH SEA LIMITED, Dyce, GB;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
E21B 47/13 (2012.01); H04L 25/49 (2006.01); H04L 27/12 (2006.01);
U.S. Cl.
CPC ...
E21B 47/13 (2020.05); H04L 25/4902 (2013.01); H04L 27/12 (2013.01);
Abstract
A transmitter for use in downhole telemetry and/or control is provided. The transmitter includes a mixer; modulator; and signal generation apparatus configured to generate a frequency modulated signal. The mixer is configured to generate an output signal based on the frequency modulated signal. A frequency spectrum of the output signal includes upper and lower sidebands disposed about a suppressed or reduced frequency of the frequency modulated signal. The modulator is operable to modulate an input signal onto the output signal. A telemetry system and associated methods are also provided.