API 6A Weld Neck Flanges are pipe flanges attach by welding the pipes to the neck of the flanges. This transfers stress from the flange to the pipe instead. It also reduces the stress concentration from the base of the hub. Welding neck flanges remove stress concentration and allow full working pressure and they are often used for high pressure applications. The inside diameter of the flange is designed to match the pipe's inside diameter. Weld neck pipe flanges are typically provided with a raised face, flat face, or RTJ facing.

Casing Cup Tester is mainly used for the pressure test on the casing string and blowout preventer stack. All of the oil (gas and water) well has been running in hole with casing and has been installing the mouth of wellhead equipment, to test pressure delamination one—off for casing and control blowout pressure system, also can be used to test pressure for casing at well site pipe yard. Test pressure very easy, provided the test pressure tool put in the casing.

Die collar is a special external fishing tool which is engaged on the outside wall of tubing objects such as oil tubing and drill pipe. It can be used in fishing cylindrical objects without inner bore or stucked inner bore.

Accumulator unit for BOP stacks is a very important equipment which controls BOP stacks and gate valves controlled by hydraulic pressure especially in drilling and workover operations. It is necessary to accurately operate and maintain the hydraulic control system. It consists of remote control system, driller’s panel, air cable (except electrical type), pipe rack (electrical warming system available for cold area), high pressure manifold, protection room, etc.