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US 2020/0392829 A1Published application
Marking and sensing a borehole wall
AssigneeNovatek IP, LLC
InventorsJonathan D. Marshall, David C. Hoyle, Scott Richard Woolston
Life of this patent
Estimating the term…
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AssigneeNovatek IP, LLC
InventorsJonathan D. Marshall, David C. Hoyle, Scott Richard Woolston
Estimating the term…
A downhole drilling apparatus, passing through a subterranean borehole, may mark an inner wall of the borehole with a marking element. A sensor, spaced axially from the marking element on the drilling apparatus, may subsequently sense the marking as it passes. A rate of penetration of the drilling apparatus may be calculated by dividing an axial distance, between the marking element and the sensor, by a time interval, between when the marking element marks the inner wall and when the marking is sensed by the sensor. Alternately, a second sensor, spaced axially from the first, may also sense the marking. A rate of penetration may then be calculated by dividing an axial distance, between the two sensors, by a time interval, between when the two sensors sense the marking.
A downhole drilling assembly, comprising:
The downhole drilling assembly of claim 0, wherein the marking element comprises at least one of an extendable cutter, a laser, a fluid jet and an ink jet.
The downhole drilling assembly of claim 0, further comprising a processor capable of calculating a rate of penetration.
The downhole drilling assembly of claim 0, wherein the marking element comprises a radially extendable cutting element capable of degrading an inner wall of a borehole.
The downhole drilling assembly of claim 0, further comprising a second sensor spaced axially from the sensor, the second sensor capable of sensing the marking of the inner wall.
The downhole drilling assembly of claim 0, wherein the sensor comprises at least one of an ultrasonic sensor, a resistivity sensor or a physical caliper.
The downhole drilling assembly of claim 0, wherein the sensor is spaced circumferentially from the marking element.
A method for downhole drilling, comprising:
Dependencies are inferred from the claim text.