Abstract: A pig receiver and methods to operate the pig receiver in pipeline pigging operations. In one embodiment, a pig receiver includes a pig receiver unit, The pig receiver also includes a pig gate valve assembly disposed on the pig receiving unit. The pig gate valve assembly includes a gate valve. The pig gate valve assembly also includes a rod, wherein the gate valve is attached to the rod at a longitudinal end of the gate valve. The pig gate valve assembly further includes a gate housing, wherein the rod is disposed within the gate housing. In addition, the pig gate valve assembly includes a cylinder guide, wherein the cylinder guide extends longitudinally from the gate housing. The pig gate valve assembly also includes a first actuator and a second actuator. The pig receiver also includes a contaminant removal system.

Abstract: A pig receiver and method to retrieve pigs in pipeline pigging operations. In one embodiment, a pig receiver includes a pressure equalization system including a gate valve, wherein a first side of the gate valve is coupled to a downstream pressure connection, and wherein a second side of the gate valve is coupled to an upstream pressure connection. The pressure equalization system also includes a pressure equalization valve disposed between the downstream pressure connection and the upstream pressure connection. The pressure equalization system also includes a pig receiver unit, wherein a first side of the pig receiver unit is coupled to the downstream pressure connection downstream of the gate valve, and wherein a second side of the pig receiver unit is coupled to the upstream pressure connection upstream of the gate valve.