Abstract: A valve assembly that includes a gate valve and an injection fitting. The gate valve has a lower body disposed between and fluidly coupled to a first pipe and a second pipe. The first pipe resides upstream of the lower body and the second pipe resides downstream of the lower body. The injection fitting is coupled to a side of the lower body of the gate valve. The injection fitting receives a sealing fluid to be flowed to the lower body of the gate valve to seal at least a portion of the gate valve.

Abstract: A scraper launcher includes a body having a rim and a trap door having a first surface and a second surface, where an interfacing portion of the second surface interfaces with an interfacing surface of the rim when the trap door is closed against the rim. A seal is provided between the interfacing portion of the trap door and the interfacing surface of the rim. The scraper launcher also includes a sealant injection system with sealant passages formed through the scraper launcher, fluidly communicating an exterior of the scraper launcher to an interior of the scraper launcher, and an injection fitting in communication with the sealant passages.

Abstract: A valve stem retainer device may include a housing that holds a valve stem. The housing may prevent the valve stem from closing without control. The device may include at least one bracket that holds on to the housing. The device may include a steel rod that holds on to the housing. The steel rod may support the at least one bracket. The device may include a double set of a washer and a nut that ensures a tight and secure connection between the at least one bracket and the housing.

Abstract: A valve stem retainer device may include a housing that holds a valve stem. The housing may prevent the valve stem from closing without control. The device may include at least one bracket that holds on to the housing. The device may include a steel rod that holds on to the housing. The steel rod may support the at least one bracket. The device may include a double set of a washer and a nut that ensures a tight and secure connection between the at least one bracket and the housing.