US 12,460,543 B2
Downhole flat-jack in-situ stress tool (DFISS) for direct in-situ stress measurement in deep wells
Hamed Soroush, Brookhaven, GA (US)
Appl. No. 18/016,485
Filed by Hamed Soroush, Brookhaven, GA (US)
PCT Filed Jul. 30, 2021, PCT No. PCT/US2021/044000
§ 371(c)(1), (2) Date Jan. 17, 2023,
PCT Pub. No. WO2022/026889, PCT Pub. Date Feb. 3, 2022.
Claims priority of provisional application 63/059,273, filed on Jul. 31, 2020.
Prior Publication US 2023/0272712 A1, Aug. 31, 2023
Int. Cl. E21B 49/00 (2006.01); G01L 1/00 (2006.01); G01L 1/02 (2006.01); E21B 47/01 (2012.01)
CPC E21B 49/006 (2013.01) [E21B 49/00 (2013.01); G01L 1/00 (2013.01); G01L 1/02 (2013.01); E21B 47/01 (2013.01)] 21 Claims
OG exemplary drawing
 
1. A tool for measuring direct in-situ stress in rock surrounding a borehole, comprising:
(a) a wireline; and
(b) a wireline package hanging from the wireline, the wireline package containing:
(i) a flat slot cutting system that cuts a flat slot having an original width in the rock surrounding the borehole;
(ii) a flat-jack stress measurement device that is vertically displaced from the flat slot cutting system in the wireline package and that fits into the slot;
(iii) a hydraulic system that expands the flat-jack stress measurement device when it is in the slot to the original width of the slot; and
(iv) a sensor that measures pressure in the hydraulic system when the flat-jack stress measurement device has expanded to the original width of the slot.