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About Black Reiver

  • Black Reiver Consulting is an organisation that specialises in oilfield training for upstream disciplines.

  • Consultancy for project feasibility, training and competency profiling and assessment.

  • Expert witness services for disputes involving directional drilling operations and equipment.

  • Competency assessment and management

  • Expert oversight of third party training programmes.

Kevin Gray


Kevin can offer the experience of over 5000 days of operational experience gained at rig sites and operations support positions from an oilfield career of over 31 years as well as working as lead trainer for a multi award winning ERD engineering team based in Perth Scotland.

Kevin has been consistently the highest rated drilling training instructor in a major multinational training company over the last four years and throughout his offshore career was repeatedly graded in top 5% within both offshore and onshore positions for the largest oilfield service company.

Kevin has designed and overseen the delivery of multi week training programs for offshore drilling, well intervention and fluid supervisors for a number of clients. This has included competency assessment and skills gap analysis throughout the programs.

Kevin is also able to draw on his well documented teaching skills to deliver courses or programs in directional drilling and surveying, stuck pipe, extended reach drilling and various other drilling related subject areas. He wrote the first Operation support centre SOP for directional drilling which was later adopted globally. In addition, he has designed and delivered various 'Real Time Centre' training courses including human dynamics training. In his former role as directional drilling coordinator, based in Aberdeen he still holds a number of world records for drilling achievements with motor and RSS tools.

In his earlier career he led an offshore team that developed the first multi axis drill vibration measurement tool to report measurements in real time, and subsequently wrote the core documentation on vibration control for D&M.

Later he was responsible for the introduction and field testing of Powerdrive RSS tools and had considerable input into their re-design as the X5 variant. Kevin has led many teams into both new fields and mature field redevelopment. Outside the industry he enjoys skiing and exploring, taking these two activities to the extreme in 2015 when he skied to the South Pole dragging a sledge behind him.

Daria Ivakhnenko


Daria is a multilingual manager in the petroleum industry with 19 years of experience in technical translation, interpreting and enabling cross-cultural and cross-departmental communication.

During her career, Daria has worked in various oil and gas project environments, including operator-controlled projects and joint activities at various development phases. She has built and managed the best practice translation and interpreting projects from the ground up, developing vast experience and knowledge of the energy sector, its technologies, regulations, contracting, HSE and other aspects.

Daria has delivered significant time-saving cost optimisation in high-risk, high-value projects through rendering translation, interpreting and communication services for her employers and customers. She is responsible for negotiation, organisation, and administration of the training courses, writing and editing training content, and linguistic support. She also manages  the company’s communication and involvement in professional and industry associations, study, research and development of training modules and courses.

Kevin Gray
Daria Ivakhnenko
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