Holmes Cut and Seal

Holmes Cut and Seal have been specialists in precision concrete cutting and core drilling for over 23 years and provides service of the highest standard based on innovation and technology.

It is no surprise that Group Five awarded Holmes cut and Seal with the contract to drill a return over flow line for an acid mine drainage project at the Weston Basin’s in Randfontein.

The project required a 130mm diameter hole to be drilled approximately 4.8meters deep with a ± 8° incline. This was achieved by using a process known as succession drilling on a Hydraulic powered core drill machine complete with power pack and extended stand length.

The process basically consists of the same diameter barrel, in varying lengths following each other on until the required drill depth is achieved. In this case, it was a 5 stage process starting with an 800mm useable length barrel, followed by a 1800mm, 2800mm and 3800mm useable length barrels. To complete this process a solid extension was then connect to the 3800mm barrel and used to drill the final depth.

The project was a great success that was completed in a matter of 4 hours.

Diamond Product’s is unique in its ability to design and manufacture tailor made solutions for all your varying project demands. This is done at our factory by our team of trained and experienced experts.
Contact our offices for any difficult project requirements!