At relatively low concentrations, the CONQOR 404 EH inhibitor is particularly effective against oxygen corrosion in aerated muds used in underbalanced drilling operations and low solids, nondispersed water-based fluids.

Applications

CONQOR 404 EH phosphate-based corrosion inhibitor is used for water-based drilling fluids, brine water systems and air, mist, and foam fluids. It is well suited for applications where calcium scale deposition is a problem, and it is especially effective in highly aerated fluids such as underbalanced drilling operations.

How it improves wells

• Compatible with anionic foamers
• Highly effective against oxygen corrosion caused by dissolved oxygen
• Low toxicity
• Minimum impact on fluids rheology
• Effective in

• fresh water or saturated saltwater
• aerated fluids like those used in air-drilling operations
• temperatures exceeding 350 degF [177 degC].

How it works

CONQOR 404 EH inhibitor is an all-purpose, water-soluble, organophosphate compound.

CONQOR 404 EH inhibitor is effective at relatively low concentrations such as 2.5 galUS/100 bbl [0.6 L/m³].

If the corrosion rate is unacceptably high, the concentration should be increased to at least 7 galUS/100 bbl [1.7 L/m³].
For aerated systems, an initial treatment of 12 galUS/100 bbl [2.9 L/m³] is recommended. The product should disperse throughout the circulating mud system and can be added either through the chemical barrel or directly to the mud pits, wherever good agitation occurs.

The corrosion rates should be monitored at all times with corrosion coupons. Treatments should be adjusted according to analysis. A good corrosion-control program includes a thorough makeup-water analysis, chemical treatments for corrosive contaminants, and an adequate bacterial control for systems that contain biodegradable additives.