Abstract: A method of restricting fluid flow through a pipe. The method comprising installing an anchor through an opening in a wall of the pipe, engaging a portion of the wall with a foot of an anchor, securing a head of the anchor to the pipe, placing a saddle between a bottom surface of the head and an outer surface of the wall of the pipe, and inflating an inflatable plug coupled to the anchor. When securing the head of the anchor to the pipe, the head remains partially outside the pipe.

Abstract: A flow restriction system is provided for restricting fluid flow through a pipe. The flow restriction system includes an anchor and an inflatable plug. The anchor includes an inflation conduit, a head, and a foot. The inflation conduit has a first end, a second end, and a passage. The second end is opposite the first end. The passage extends from the first end toward the second end. The head is coupled to the first end of the inflation conduit. The head includes an opening in fluid communication with the passage. The foot is coupled to the second end of the inflation conduit. The inflatable plug is coupled to the anchor. The inflatable plug includes an interior chamber. The interior chamber is in fluid communication with the passage. The head and the foot are configured to engage diametrically opposed sections of the pipe.

Abstract: A mechanical plug includes first and second plug portions and an elongate member. The first plug portion includes a first endwall and a first sidewall. The first sidewall includes a female section extending in a direction along a longitudinal axis of the mechanical plug. The second plug portion is movable relative to the first plug portion. The second plug portion includes a second sidewall, a second endwall coupled to the second sidewall, and a seal. The second sidewall includes a male section extending in a direction along the longitudinal axis. The seal surrounds a portion of the male section in a region along the longitudinal axis between the second endwall and the female section. The elongate member is coupled to the first and second plug portions. Actuation of the elongate member moves the first plug portion and the second plug portion toward each other to compress the seal.