Patent ID: 11867053
Assignee: SAUDI ARABIAN OIL COMPANY
Field: Measurement (Instruments)
Classification: CPC E  G | IPC E  G

Claim 0:
1. An apparatus for testing a rock in a bore, the apparatus comprising:
a monitoring head having geophones and transmitters inside a cylindrical body,
a shear head coupled to the monitoring head from below, the shear head having a tubular structure with a plurality of apertures formed around an outer surface of the tubular structure,
a plurality of cones coupled with modified tips and disposed within the plurality of apertures, and
a sheet supporting the plurality of cones inside the shear head and selectively movable between a first radial position and a second radial position for the modified tips to apply radial force to the rock by adjustment of an internal pressure of the shear head,
wherein the modified tips are inside the outer surface when the sheet is at the first radial position, in contact with the rock when the sheet is at a third radial position between the first radial position and the second radial position, and at a maximum penetration distance in the rock when the sheet is at the second radial position, and
wherein the geophones record acoustic emission generated between the modified tips and the rock and the transmitters transmit the recorded acoustic emission to a computing system for determining properties of the rock while the apparatus is testing the rock in the bore.