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home: Wireline

Wireline Corrosion Protection:
Deep Sea Deliverance

Industry: Deep Ocean Exploration

Challenge:
A leading engineering firm specializing in advanced technology for deep sea and outer space applications faced a tough problem with its remotely operated vehicles (ROVs) used for deep sea exploration, drill rig repair and other specialized subsea work. The electrical-mechanical wireline that serves as a critical umbilical lifeline for the ROVs were corroding faster than anticipated. With each deep sea wireline valued in the hundreds of thousands of dollars—and each ROV valued at far more—finding a more effective corrosion protection solution was a critical priority.

The company tried numerous alternatives, including both penetrating oils and greases, but were unable to find a product that met their requirements for both surface and internal corrosion protection. At the end of their rope, the company turned to Grignard Company.

Solution:
Grignard chemists worked closely with the company’s project and corrosion engineers to create a detailed “wish list” of criteria. The goal was to develop a solution that would extend wireline life from three years to five years or more. Specific requirements included:

	Penetrate between armor wires to protect inner wires
	Prevent corrosion on drum during storage
	Non-flammable
	Non-toxic
	Cost-effective
	Easy-to-apply
	Create no “rainbow sheen” on water
	Worldwide delivery

Grignard chemists tested more than 60 materials, including a wide range of vegetable and fish oils. The result of their work was OLL D-2, a non-hazardous, semi-synthetic corrosion inhibitor that effectively clings to the wireline surface, while penetrating the inner armor wires and displacing moisture.

Following successfully testing in the lab and in the ocean, OLL D-2 became the customer’s global standard for wireline corrosion protection, delivered by Grignard to locations around the world.