Title:
DRILLING APPARATUS WITH ANTI-VIBRATION INERTIAL BODY
Document Type and Number:
WIPO Patent Application WO2005047638
Kind Code:
A3
Abstract:
A blast-hole drilling rig includes a carriage, a mast disposed on the carriage, and a rotary head mounted on the mast for up-and-down movement. The rotary head includes: a housing forming an internal chamber, a hydraulically driven motor, and a rotation transmission mechanism disposed in the chamber. The rotation transmission mechanism includes a gear system having a high-speed power input section operably connected to the motor, and a low-speed power output section adapted for connection to a drill pipe. The rotation transmission mechanism includes an anti-vibrational inertial body forming part of the high-speed power input section for storing rotational energy to even-out rotary speed variations and resist the generation of vibrations during operation. The inertial body includes a downwardly open recess in which the motor casing extends, wherein the motor projects downwardly past a bottom wall of the housing.
Inventors:
LEPPANEN JARMO (US)
Application Number:
PCT/US2004/033495
Publication Date:
August 25, 2005
Filing Date:
October 13, 2004
Export Citation:
Assignee:
SANDVIK AB (SE)
LEPPANEN JARMO (US)
LEPPANEN JARMO (US)
International Classes:
E21B3/02; F03C1/06; (IPC1-7): E21B19/08
Foreign References:
| US4281560A | 1981-08-04 | |||
| US2879034A | 1959-03-24 | |||
| US3534636A | 1970-10-20 |
Other References:
APPLICANTS ADMITTED PRIOR ACT figures 1-3 and corresponding detailed description
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