With a BTech in Biomedical Engineering and MTech in Medical Instrumentation, you can definitely apply for instrumentation engineer roles in the oil and gas industry, including offshore jobs.

Instrumentation in oil and gas involves monitoring and controlling machinery and processes which is quite related to your background in medical instrumentation because both require handling complex instruments and control systems.

You might need to get familiar with industry-specific standards and tools used in oil and gas, like SCADA systems, PLCs, and safety regulations for offshore platforms. Certifications or short courses related to industrial instrumentation can boost your chances.

So, your educational background is relevant and you can transition into instrumentation engineering roles offshore with some targeted preparation and skill upgrade!