Drill rod position stabilizing device
US5988298A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 16, 1997 |
| Grant date | Nov 23, 1999 |
| Priority date | — |
| Expiry date | Sep 16, 2017 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B19/24
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A drilling device has a drilling mast and a movable drifter thereon with a drill rod stabilizing device for stabilizing drill rods in position during drilling. The stabilizer travels along the mast along with the drifter, and includes a locking arm that automatically opens and closes the stabilizer to allow passage of drill rods into an out of the drill line from storage, while supporting the drill rods during drilling. In a substantially vertical drilling position, the stabilizer is moved downwardly by gravity, and upwardly by the drifter's drive chain, which is retained in contact with the stabilizer by a pick-up link on the drive chain contacting stop blocks on the stabilizer. In a substantially horizontal drilling position, the stabilizer is moved in a return direction by the pick-up link and stop block combination. The stabilizer is advanced in the opposite direction by the drifter's pick-up link, which is retained in contact with the stabilizer by a pair of spaced-apart rollers on the stabilizer that frictionally contact and retain the pick-up link and stabilizer together.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.