US 12,460,530 B2
Drilling rate of penetration
Gordon Stewart, Forrestfield (AU)
Assigned to IMDEX TECHNOLOGIES PTY LTD, Balcatta (AU)
Appl. No. 17/923,229
Filed by GLOBALTECH CORPORATION PTY LTD, Forrestfield (AU)
PCT Filed May 4, 2021, PCT No. PCT/AU2021/050410
§ 371(c)(1), (2) Date Nov. 4, 2022,
PCT Pub. No. WO2021/222977, PCT Pub. Date Nov. 11, 2021.
Claims priority of application No. 2020901410 (AU), filed on May 4, 2020.
Prior Publication US 2023/0184085 A1, Jun. 15, 2023
Int. Cl. E21B 45/00 (2006.01); E21B 44/00 (2006.01); G01C 5/06 (2006.01); G01C 21/16 (2006.01); G01C 25/00 (2006.01)
CPC E21B 45/00 (2013.01) [E21B 44/00 (2013.01); G01C 21/165 (2013.01); G01C 21/1652 (2020.08); G01C 21/1656 (2020.08); G01C 25/00 (2013.01); G01C 5/06 (2013.01)] 8 Claims
OG exemplary drawing
 
1. A drilling rate of penetration or distance moved measurement system for a drilling operation, the system comprising:
at least one sensor apparatus mounted on a drill rig, wherein the at least one sensor apparatus includes a first sensor and a second sensor, wherein the first sensor is a first barometric pressure sensor mounted on a mast or a drill string to move vertically with progression of a drill bit and is configured to detect a change in surrounding air pressure with advancing or withdrawing movement of the drill bit, and the second sensor is a second barometric pressure sensor mounted at a fixed position on the drill rig to provide a reference pressure measurement; and
at least one processor in data communication with the at least one sensor apparatus, wherein the at least one processor calculates an incremental distance of progression of the drill bit based on difference between barometric pressure measured by the first barometric pressure sensor and the second barometric pressure sensor.