COMPLETION TOOLS

Downhole tools are offered in various material configurations for a variety of well conditions. The following alloys and groups of alloys are the most common materials used for the construction of packers and related equipment:

• Standard, non-corrosive service: Low alloy steels (e.g. 4140 or Chinese 42CrMo) with mechanical properties compatible with API P1 10 tubulars.
• Non-corrosive service containing H2S: Low alloy steels (e.g. 4140 or Chinese 42CrMo) with mechanical properties compatible with API L80 tubulars.
• Corrosive CO2 service with little or no H2S: Martensitic and PH stainless steels (e.g. 9Cr, 13Cr, 17-4PH) with mechanical properties that vary from 80 ksi to 110 ksi minimum yield strength. The selection of the specific corrosion resistant alloy depends on the environment (pH, chlorides, temperature, H2S, etc.) and strength requirements.
• Severely corrosive CO2 and H2S: Nickel alloys such as 718 at strength level of 110 ksi minimum yield strength and higher.

For equipment required to perform a temporary function and then allowing quick removal by drilling or milling, an additional group of materials are used:

• Cast iron
• Reinforced polymer based composites