US 12,111,292 B2
Method for determination of properties of cuttings from rock drilling
Juergen Schoen, Leoben (AT); Christian Koller, Lannach (AT); and Luis Arnaldo Gonzalez, Cracow (PL)
Assigned to THINK AND VISION GMBH, Leoben (AT)
Appl. No. 17/769,286
Filed by THINK AND VISION GMBH, Leoben (AT)
PCT Filed Sep. 16, 2020, PCT No. PCT/EP2020/075846
§ 371(c)(1), (2) Date Apr. 14, 2022,
PCT Pub. No. WO2021/053005, PCT Pub. Date Mar. 25, 2021.
Claims priority of application No. 19197841 (EP), filed on Sep. 17, 2019.
Prior Publication US 2022/0412854 A1, Dec. 29, 2022
Int. Cl. G01N 3/06 (2006.01); E21B 49/02 (2006.01); G01N 33/24 (2006.01)
CPC G01N 3/06 (2013.01) [E21B 49/02 (2013.01); G01N 33/24 (2013.01); G01N 2203/0087 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A method for determining properties of cuttings from rock drilling in which the cuttings are crushed between at least two rollers, at least one of the at least two rollers being driven by a motor, the method comprising:
determining a mechanic specific energy of the cuttings by measuring electric energy applied by the motor, the mechanic specific energy being calculated as

OG Complex Work Unit Math
where:
MSE=the mechanic specific energy,
U=a voltage,
I=an electric current,
Vr=a volume of rock cuttings,
η=a mechanical efficiency of the at least two rollers,
ts=a test start time, and
te=a test end time.