Wells – Processes – With indicating – testing – measuring or locating
Patent
1997-10-31
1999-10-19
Schoeppel, Roger
Wells
Processes
With indicating, testing, measuring or locating
166291, E21B 4700
Patent
active
059672315
ABSTRACT:
A method of indicating the release of a plug, such as a cementing plug for an oil or gas well, includes releasing a plug from a retained position in a tube system, and in response to releasing the plug, opening an electrical circuit to which the plug was connected in the retained position. The method also includes generating, in response to opening the electrical circuit, a plug release indicator signal. The indicator signal can be generated in response to, for example, a low frequency electromagnetic signal.
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LaFleur Petroleum Services publication entitled "Fasdrop--Safety Remote Cementing Head--Operation and Maintenance Manual," believed to be published prior to Oct. 1, 1996.
LaFleur Petroleum Services publication entitled "Now . . . a safe, sure and proven cementing head that permits positive plug drop with continuous cement flow," believed to be published prior to Oct. 1, 1996.
Butterfield, Jr. Charles A.
Laurel David F.
Tilghman Stephen E.
Gilbert III E. Harrison
Halliburton Energy Service,s Inc.
Roddy Craig W.
Schoeppel Roger
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