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:
Sep. 14, 2004
Filed:
May. 22, 2002
Applicant:
Inventors:
Bradley T. Carlson, Cypress, TX (US);
Ronnie D. Hughes, The Woodlands, TX (US);
Assignee:
BJ Services Company, Houston, TX (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
E21B 3/316 ;
U.S. Cl.
CPC ...
E21B 3/316 ;
Abstract
A system for use in detecting the launching of a device, such as a wiper plug or a sealing ball, is described having a first component, such as a detectable object disposed within the device, and a second component, such as a sensor. The sensor may be a sensor coil, while the detectable object may be a transponder capable of emitting Radio Frequency Identification signals to the sensor to signal its arrival adjacent the sensor. The system may be used with a concrete head or with a sealing ball injector. A method of launching the devices is also disclosed.