E - Fixed Constructions – 21 – B
Patent
E - Fixed Constructions
21
B
E21B 47/14 (2006.01) E02F 5/14 (2006.01) E21B 7/04 (2006.01) E21B 47/022 (2006.01) E21B 47/12 (2006.01) G01S 13/74 (2006.01) G01S 13/86 (2006.01) G01S 13/87 (2006.01) G01V 1/42 (2006.01) G01V 3/12 (2006.01) G01V 3/30 (2006.01) G01S 13/88 (2006.01)
Patent
CA 2241808
An apparatus and method for locating an underground boring tool using a radar- like probe and detection technique. A boring tool is provided with a device which generates a specific signature signal in response to a probe signal transmitted from above the ground. Cooperative operation between the probe signal transmitter at ground level and a signature signal generator disposed within the boring tool provides for the accurate locating of the boring tool, despite the presence of a large background signal. The signature signal produced by the boring tool may be generated either passively or actively, and in a manner which differs from the probe signal in one or more ways, including timing, frequency content, or polarization. A survey of a boring site, made either prior to or during the boring operation, provides data related to the characteristics of the ground medium subjected to the survey and the identification of underground hazards, such as buried utilities.
L'invention se rapporte à un appareil et à un procédé de localisation d'un outil de forage souterrain selon une technique de détection et de sonde de type radar. L'outil de forage est pourvu d'un dispositif qui génère une signature spécifique en réponse à un signal de sonde émis au-dessus de la surface du sol. La coopération entre l'émetteur de signaux de sonde au niveau du sol et un générateur de signature placé dans l'outil de forage assure la localisation précise de l'outil en dépit de la présence d'un important bruit de fond. La signature envoyée par l'outil de forage peut être générée de manière soit passive, soit active, et diffère du signal de sonde par une ou plusieurs caractéristiques telles que la synchronisation, la fréquence interne ou la polarisation. Un examen du site de forage, fait avant ou pendant l'opération de forage, fournit des données relatives aux caractéristiques du terrain examiné et repère les obstacles souterrains tels que des installations enterrées.
Allen Christopher T.
Stump Gregory S.
Robic
Vermeer Manufacturing Company
LandOfFree
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