United Drilling Tools Ltd Noida, Uttar Pradesh

• Hole Size Range (In)6.1/8 – 6.3/4
• DC Diameter Range (In)4.1/8 - 4.3/4

• LENGTH (In)14-7/16

"UDT MAKE" 'AN' Series Valves are charged with nitrogen pressure acting on the bellows. This determines the set pressure of the valve. Nitrogen charged valves are primarily sensitive to casing pressure. The valve is open when the combination of pressures supplied by the casing and tubing exceed the dome pressure. As the casing pressure declines to the valve set pressure, the gas lift valve closes. Since the casing pressure controls the valve operation, the nitrogen charge is reduced in each lower valve to avoid interference with the upper valves. All UDT Series Valves are suitable for either continuous, flow or intermittent lift wells.

"UDT MAKE" lifting subs can be either tapered or square shoulder types and are made from AISI 41454140. They are available in all diameters and lengths. When ordering , specify size and type.Drill collar connection size & type and Bore.

• PORT SIZE (In)7/16

"UDT Make" Orifice Valves is a retrievable valve used to install in the side pocket mandrel prior to circulation. It prevents the pocket damage from abrasive well fluids while circulating. Efficiency of back check valve provides large flow capacities. Positive sealing feature of back check valve provides protection from intrusion of production fluid into casing annulus. Various orifice materials (SS, monel, inconel & tungsten carbide) available to meet application requirements. Orifice sizes available for this valve design range from 18 through 716 inch in 1 inch size and from 18 through 5 164 inch in 1 1 2-inch size, thus making them suitable for a wide range of operating conditions.