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:
Dec. 12, 2000
Filed:
Jul. 17, 1998
Paul I Herman, Plano, TX (US);
Halliburton Energy Services, Inc., Dallas, TX (US);
Abstract
An electromagnetic telemetry system for changing the operational state of a downhole device (84) disclose. The system comprises an electromagnetic transmitter (76) disposed in a first wellbore (30) that transmits a command signal. An electromagnetic repeater (68) disposed in a second wellbore (38) receives the command signal and retransmits the command signal to an electromagnetic receiver (96) disposed in a third wellbore (46) that is remote from the first wellbore (30). The electromagnetic receiver (96) is operably connected to the downhole device (84) such that the command signal received from the electromagnetic repeater (68) is used to prompt the downhole device (84) to change operational states.