The Challenge

As companies involved in oil and gas exploration and production continue to push boundaries into deeper wells, a major challenge is the reliable operation of drilling, completion and production equipment under extreme environments. For example, chemical injection systems depend upon check valves that can prevent reverse flow of chemically aggressive wellbore fluids at extreme temperatures and pressures without the possibility of leakage.

The Solution

For decades, The Lee Company has continually expanded the performance limits of their field-proven range of LeeChek miniature check valves. Recent developments have resulted in configurations completely manufactured out of materials compliant with NACE specification MR0175/ISO 15156. The valves utilize MP35N bodies and poppets for durability, and custom polymeric valve seats that offer zero leakage of fluid at pressures up to 15,000 psid and at temperatures up to 400° F. Seat material options are available to achieve compatibility with typical subsea and downhole fluids and gases.

The Benefits

NACE-compliant, zero-leak LeeChek valves exceed the performance requirements necessary for oil tool operation under the extreme environmental conditions found in deep wells. The valves are 100% performance tested to guarantee reliable, consistent performance for the life of the system. They are also self-retained, without the need for O-rings, through the use of the field-proven Lee locking end, which securely locks the valves in place and prevents any bypass leakage. Available in diameter sizes from 0.187 in to 0.50 in, LeeChek check valves optimize the combination of size and flow rate for most downhole applications. Configurations may also include integrated safety screens or restrictors for added protection and performance.

Potential Applications

Reverse flow prevention valves are commonly used in oil tools operating in all stages throughout the life of an oil well. NACE-compliant zero-leak LeeChek valves are ideal when the application requires zero leakage at high differential pressures in high-temperature, corrosive environments. They are currently in service in chemical injection systems, gas lift systems and downhole safety valves.

LeeChek Valves

These NACE-compliant, zero-leak LeeChek valves are the latest innovation in the extensive offering of check valves available from The Lee Company. With diameter sizes available from 1.0 in to 0.093 in, LeeChek valves are the smallest in the world. The Lee Company has supplied millions of LeeChek valves worldwide, many operating for over 30 years in service. LeeChek valves set the standard for size, weight and dependability.

The Lee Company

2 Pettipaug Rd., P.O. Box 424, Westbrook, CT 06498-0424

Tel: 860-399-6281 • Fax: 860-399-7037 •