About Coring

Coring Magazine is a quarterly international magazine focusing on exploration core drilling. The magazine aims to deliver fresh information, case studies, opinions, news and articles about drilling companies, products, projects and more. Coring Magazine’s target audience is drilling contractors, exploration companies and mining company exploration departments, service companies, drilling suppliers and manufacturers and anyone involved in exploration core drilling. The driving force behind Coring magazine is the technical team, themselves drilling professionals experienced and well-known in the EDD industry. Because they speak the same language as the drilling industry, it is they who will decide on what is interesting and valuable for the readership and so earn a place in the magazine.

Coring Magazine Cover


Grigor Topev

Founder, Managing Editor

Grigor Topev is the founder and managing editor of Coring and co-owner of BG Drilling Solutions, an international directional drilling service supplier. He holds bachelor and master degrees in drilling engineering, and since graduating in Sofia, Bulgaria, in 2003, he has worked extensively in the diamond drilling industry, participating in drilling projects in Hong Kong, Japan, Australia, Sweden, Finland, Norway, Switzerland, Serbia, Bulgaria, Spain, Portugal, Ireland, Libya, Zambia, Brazil, Guyana and Canada. Though he has specialized in directional drilling during the last 10 years, he has broad experience in diamond drilling in general, working as drilling foreman on several projects.
Grigor started the Coring initiative at the end of 2015 as an expression of his passion and interest in diamond drilling. His aim is to make Coring the definitive diamond drilling magazine.

Bob Chapel


Bob Chappell is UK-born and educated and now lives in Cape Town, South Africa. He learnt his editing in Cape Town and has worked extensively in education and trade magazine publishing as well as in the corporate social responsibility field.
A practical lad from Yorkshire, Bob enjoys the varied and often fascinating subject matter general editing brings with it and the challenge of helping technical people communicate their expertise and enthusiasm.

Ivan Ginev

Design & Layout

Ivan Ginev is founder and creative director of Cog Graphics – a graphic design studio, based in Sofia, Bulgaria. The company provides professional design services to a wide variety of businesses, including media outlets, non-governmental organizations, property management companies, food and drink producers, etc.
Ivan has broad expertise in the fields of web design, visual identity and print design, coming from nearly 20 years of work in the design industry, and is always looking for the sweet spot between perfect visual aesthetics and common-sense practicality.