Method for determination of properties of cuttings from rock drilling
AssigneeThink and Vision GmbH
InventorsJuergen Schoen, Christian Koller, Luis Arnaldo Gonzalez
Life of this patent
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Abstract
In a method for determination of properties of cuttings from rock drilling the cuttings are crushed between at least two rollers, at least one roller being driven by a motor. A mechanic specific energy of the cuttings is determined by measuring the energy applied by the motor.
Claims17
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
- M
-
- S
-
- E
- =
- U
- *
- η
- V
- r
- *
- [
- ∫
- t
- s
- t
- e
- I
-
- (
- t
- )
-
- dt
- ]
- 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.
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,
- wherein a torque applied by the motor is measured,
- wherein the electric energy applied by the motor is calculated as
- M
-
- S
-
- E
- =
- π
- *
- η
- 3
-
- 0
- *
- V
- r
- [
- ∫
- ts
- te
- T
-
- (
- t
- )
- *
- n
-
- (
- t
- )
- *
- d
-
- t
- ]
- where:
- MSE=the mechanic specific energy,
- T=the torque,
- n=a rotational speed,
- 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.
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,
- wherein a torque applied by the motor is measured,
- wherein the electric energy applied by the motor is calculated as
- M
-
- S
-
- E
- =
- π
- *
- η
- 3
-
- 0
- *
- V
- r
- [
- ∑
- t
- s
- t
- e
- [
- T
- i
- *
- n
- i
- *
- Δ
-
- t
- ]
- ]
- where:
- MSE=the mechanic specific energy,
- Ti=the torque,
- ni=a rotational speed,
- Vr=a volume of rock cuttings,
- η=a mechanical efficiency of the at least two rollers,
- Δt=a time between two measurements,
- ts=a test start time, and
- te=a test end time.
Dependencies are inferred from the claim text.