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US 2004/0104028 A1Published application
Method and device for sealing boreholes
OwnerFrank William Bodellinventor
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Abstract
A device and method for sealing boreholes. Typically, a seismic test hole is sealed by covering a topping plug with water expansible material, such as bentonite, which seals the hole once it expands on exposure to water or moisture. The present invention provides a method and a device for sealing seismic holes, the device comprising a generally tubular water permeable sleeve filled with water expansible aggregate.
Claims14
A device for sealing a borehole comprising:
- a generally tubular water permeable sleeve, said sleeve being closed at both ends, and water expansible aggregate, said aggregate located within and contained by the sleeve, said sleeve generally of a size and stiffness to maintain its shape when filled with said water expansible aggregate to permit insertion into a borehole and allow expansion of its contents on exposure to water.
Dependencies are inferred from the claim text.