Abstract: A system and method for pipe insertion in live gas mains includes isolating a section of the gas main and taking measurements of service line connection points. This data is then used to prepare a pipe to be inserted into the gas main by drilling holes and applying fittings at the appropriate locations. The prepared pipe is then inserted into the gas main and the service lines are connected to it without the need to excavate the street over each service connection. The inserted pipe is then fluidly connected to the cut ends of the gas main and gas flow is routed through the newly inserted pipe and the attached service lines, while gas continues to flow through the original portions of the gas main that still remain in service.

Abstract: A system and method for pipe insertion in live gas mains includes isolating a section of the gas main and taking measurements of service line connection points. This data is then used to prepare a pipe to be inserted into the gas main by drilling holes and applying fittings at the appropriate locations. The prepared pipe is then inserted into the gas main and the service lines are connected to it without the need to excavate the street over each service connection. The inserted pipe is then fluidly connected to the cut ends of the gas main and gas flow is routed through the newly inserted pipe and the attached service lines, while gas continues to flow through the original portions of the gas main that still remain in service.

Abstract: A launch system for a pressurized pipeline includes a housing attachable to the pipeline such that an inside of the housing is open to an interior of the pipeline and an outside of the housing is exposed to an ambient environment outside the pipeline. A first actuator arrangement is disposed on the outside of the housing, and a second actuator arrangement is disposed on the inside of the housing. A seal arrangement is disposed in the housing between the first actuator arrangement and the second actuator arrangement. Each of the first and second actuator arrangements is configured to receive a cable having a portion extending outside the housing, a portion extending through the seal arrangement, and a portion extending inside the housing. The actuator arrangements are independently operable to pull the cable relative to the seal arrangement for moving the cable into and out of the pipeline.

Abstract: A launch system for a pressurized pipeline includes a housing attachable to the pipeline such that an inside of the housing is open to an interior of the pipeline and an outside of the housing is exposed to an ambient environment outside the pipeline. A first actuator arrangement is disposed on the outside of the housing, and a second actuator arrangement is disposed on the inside of the housing. A seal arrangement is disposed in the housing between the first actuator arrangement and the second actuator arrangement. Each of the first and second actuator arrangements is configured to receive a cable having a portion extending outside the housing, a portion extending through the seal arrangement, and a portion extending inside the housing. The actuator arrangements are independently operable to pull the cable relative to the seal arrangement for moving the cable into and out of the pipeline.

Abstract: A launch system for a pressurized pipeline includes a housing attachable to the pipeline such that an inside of the housing is open to an interior of the pipeline and an outside of the housing is exposed to an ambient environment outside the pipeline. A first actuator arrangement is disposed on the outside of the housing, and a second actuator arrangement is disposed on the inside of the housing. A seal arrangement is disposed in the housing between the first actuator arrangement and the second actuator arrangement. Each of the first and second actuator arrangements is configured to receive a cable having a portion extending outside the housing, a portion extending through the seal arrangement, and a portion extending inside the housing. The actuator arrangements are independently operable to pull the cable relative to the seal arrangement for moving the cable into and out of the pipeline.

Abstract: A launch system for a pressurized pipeline includes a housing attachable to the pipeline such that an inside of the housing is open to an interior of the pipeline and an outside of the housing is exposed to an ambient environment outside the pipeline. A first actuator arrangement is disposed on the outside of the housing, and a second actuator arrangement is disposed on the inside of the housing. A seal arrangement is disposed in the housing between the first actuator arrangement and the second actuator arrangement. Each of the first and second actuator arrangements is configured to receive a cable having a portion extending outside the housing, a portion extending through the seal arrangement, and a portion extending inside the housing. The actuator arrangements are independently operable to pull the cable relative to the seal arrangement for moving the cable into and out of the pipeline.

Abstract: A system and method for pipeline maintenance may include a payload and a transport module having the payload attached thereto. The transport module may include a plurality of movable arms each having at least one respective wheel. At least some of the wheels may be drive wheels which are operable in a first orientation to drive the transport module linearly along a length of a pipeline, and are further operable in a second orientation to drive the transport module circumferentially around an inner surface of the pipeline. At least some of the arms are operable to move the payload in a generally radial direction toward and away from an interior surface of the pipeline.