Drilling process monitor

Details Drilling process monitor Drilling process monitor

2001-08-30

2003-10-28

Neuder, William (Department: 3672)

Boring or penetrating the earth

Automatic control

Of advance or applied tool weight

C175S048000, C702S009000

Reexamination Certificate

active

06637523

ABSTRACT:

FIELD OF THE INVENTION
The present invention relates to systems for drilling holes in the ground.
BACKGROUND
In a drilling operation, a drilling assembly is used to drill a hole in the earth. It is sometimes desirable to monitor the progress of the drilling operation.
SUMMARY OF THE INVENTION
An apparatus is used with a drilling assembly for drilling a borehole. The drilling assembly has a drill head. An impact device of the drilling assembly is linked to the drill head. The impact device is powered by a first fluid under a first pressure to impart a percussive force to the drill head. The percussive force is a function of the first pressure. A thruster of the drilling assembly is also linked to the drill head. The thruster is powered by a second fluid under a second pressure to impart a thrust force to the drill head. The thrust force is a function of the second pressure. Additionally, a rotator of the drilling assembly is linked to the drill head. The rotator is powered by a third fluid under a third pressure to impart a torque to the drill head. The torque is a function of the third pressure. The apparatus includes a first pressure sensor communicating with the first fluid to output a first electrical signal that is a function of the first pressure. A second pressure sensor communicates with the second fluid to output a second electrical signal that is a function of the second pressure. A third pressure sensor communicates with the third fluid to output a third electrical signal that is a function of the third pressure. A position sensor outputs a fourth electrical signal that is a function of depth of the drill head relative to a reference location. A device monitors the first, second, third and fourth signals. The device produces respective graph traces of functions of the percussive force, the thrust force, the torque and the depth.
In a preferred embodiment, the device produces the graph traces in real time during the drilling operation. The first, second and third electrical signals are analog signals. The fourth electrical signal is a digital signal. The graph traces are indicative of the occurrence of downward drilling, drilling stoppage, raising of the drill head, and addition of drilling rods.


REFERENCES:
patent: 5237539 (1993-08-01), Selman
patent: 6233498 (2001-05-01), King et al.
patent: 6233524 (2001-05-01), Harrell et al.
patent: 2001/0045300 (2001-11-01), Fincher et al.
Gui, M.W. et al., “Instrumented borehole drilling using ENPASOL system,” pp. 1-5. (undated prior art).
Colosimo, Paulo, “On the use of drilling parameters in rock foundations,” Geotechnical Site Characterization, Robertson & Mayne (eds) © 1998 Balkema, Rotterdam, pp.347-352.
Tani, Kazuo, “Importance of instrumental drilling,” Geotechnical Site Characterization, Robertson & Mayne (eds) ™ 1998 Baulkema, Rotterdam, pp. 431-437.
Nishi, K., “Estimation of soil resistance using rotary percussion drill,” Geotechnical Site Characterization, Robertson & Mayne (eds) ™ 1998 Balkema, Rotterdam, pp. 393-398.
Garassino, A.L. et al., “Detection of cavities by monitored borehole drilling (TMD),” Geotechnical Site Charactertization, Robertson & Mayne (eds) © 1998 Balkema, Rotterdam, pp. 365-370.
Pfister, Paul, “Recording drilling parameters in ground engineering,” Ground Engineering, Apr. 1985 (pp. 16-21) and corresponding title page of journal.
Fortunati, Fabio et al., “The use of electronics in the management of site investigation and soil improvement works: principles and applications,” Geotechnical Site Characterization, Robertson & Mayne (eds) © 1998 Balkema, Rotterdam, pp. 359-363.

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