Dropped Power Swivel

Cause & Consequence

• Collapse, overturn or failure of lifting equipment

Incident Location

Specialist vessel eg diving, construction, survey

Incident Activity

Seismic/survey operations

Specific Incident Equipment

Soil boring vessel hoisting equipment

Lessons Identified

Vessel on hire surveys to consider all aspects of the work and not just Marine.

Vessel contractor to did not conduct formal risk assessments for new contract (and generic assessment did not include safe positions of personnel during tasks).

Contractor’s Management of Change was not applied prior to changing winch (which was not a like-for-like change).

Company Drilling Representatives will be present when performing Soil Boring activities.

Contactor’s Planned Maintenance shall take cognizance of manufacturers recommendations.

Communication failures between multi discipline teams resulted in gaps in contracting, acceptance and start ups for Soil Boring operations.

No worksite acceptance and inspection criteria in contracts.

No specific International Guidance on Soil Boring of vessels, inspection criteria to be defined by 3rd party drilling rig inspection vendors and made specific for soil boring drilling packages.

Incident Recommendations

Offshore soil boring operations are very similar to drilling operations, however this had not been recognized and in house drilling expertise is now utilized in current and future operations both in planning and execution.

A review has been conducted in-Country to ensure SCM, Contract Users and other specialist departments (Drilling) are present during pre-tender evaluation, kick off meetings and execution.

Language will be inserted into all contracts where company has exposure to include acceptance criteria that requires all agreed critical action items are closed prior to start up as per a drilling contract.

Competent client and contractor representatives must be present for all pre-mobilization risk assessments, including those who will supervise the (Drilling) works including Company Safety Advisors.