System for controlling drilling force of a telescoping rock dril

Details System for controlling drilling force of a telescoping rock dril System for controlling drilling force of a telescoping rock dril

1991-09-11

1992-07-21

Yost, Frank T.

Tool driving or impacting

Processes

173 4, 173 11, 173 19, 175 27, E21B 4400

Patent

active

051314754

ABSTRACT:
A telescoping drill has a base, a guideway displaceable longitudinally forwardly and rearwardly on the base, a guideway actuator braced between the guideway and the base and energizable for longitudinal forward displacement of the guideway on the base, a guideway source of energy connected to the guideway actuator for longitudinally forwardly displacing the guideway on the base, a drill carriage displaceable longitudinally on the guideway between a front position and a rear position, a drill actuator braced between the drill carriage and the guideway for longitudinal forward displacement of the carriage on the guideway, and a drill source of energy independent of the guideway energy source and connected to the drill actuator for longitudinally forwardly displacing the drill carriage on the guideway. A sensor detects when the drill carriage is in the rear position. A controller is connected between the sensor and the guideway source for arresting forward displacement of the guideway on the base when the drill carriage is in the rear position.

REFERENCES:
patent: 3823784 (1974-07-01), Feucht
patent: 3880244 (1975-04-01), Boom et al.
patent: 4113033 (1978-09-01), Lindblad
patent: 4246973 (1981-01-01), Mayer
patent: 4503918 (1985-03-01), Bergkvist et al.
patent: 4537263 (1985-08-01), Bjor
patent: 4848485 (1989-07-01), Piipponnen et al.

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