Drill ICAM-preliminary information. For information purposes only. Managers & Supervisors should evaluate this information to determine if it can be applied to their own situations and practices. Drilling terms. Feed Cylinder. Steel wire rope. Drill string down. Sheave wheel.
Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.
For information purposes only. Managers & Supervisors should
evaluate this information to determine if it can be applied to their own situations and practices.
Steel wire rope
Drill string down
Hydraulic hose fitting
Fitter had completed daily checks on Drill and was undertaking the repair to an oil leak on the left side feed cylinder of the drill. Mechanic was observing Fitter as, Mechanic, was being coached on the workings & maintenance aspects of the drill. Fitter had requested the drill operator to raise the drill string [for] better access the leaking hose fitting to work on. Fitter took up a kneeling position with their right leg over the drill platform hole through which the drill string passes during drilling operations.
Fitter loosened the hydraulic hose fitting which connected to the feed cylinder. This resulted in the loss of hydraulic stored energy within the cylinder, resulting in the release of the drill string which plunged down and as it passed through the platform drill hole it resulted in the amputation of the right leg below the knee.
Mechanic had taken up a position on the right side of Fitter with back to the [drill] operators cabin. Mechanic was probably holding on to the steel rope, which passes under a sheave wheel for the control of the up & down movement of the drill string, with their right hand. When the pressure was released from the feed cylinder the power head ...[the] drill string moved downwards as did the steel rope [and the] Mechanics right hand was pulled through the sheave wheel resulting in the amputation of four fingers & thumb.
Drill string in a raised position (drill bit seen here)
Simulated position of the Fitter with his right leg over the drill hole
Hydraulic hose fitting that was loosened resulting in the release of stored energy