A method for detecting and repairing external diseases of a buried drainage pipeline includes steps of: S1, controlling a robot to enter the pipeline to perform comprehensive detection of pipeline diseases; S2, analyzing detected pipeline diseases with a computer terminal based on detection results of the robot, and determining locations of external diseases of the pipeline; S3, controlling the robot to detect a depth of the external diseases of the pipeline relative to a ground surface; S4, determining a projection position of the external diseases of the pipeline on the ground surface according to detection results of the step S2, and drilling a hole from the ground surface; determining a drilling depth according to detection results of the step S3, and inserting a grouting pipe; and S5, grouting and repairing the external diseases of the pipeline through the grouting pipe.

Segments are linked in the circumferential direction to assemble a pipe unit. A link bolt is used to link the segments of the pipe unit in the longitudinal direction to assemble a rehabilitation pipe inside an existing pipe. An elastically deformable hollow cylindrical member having a tongue is attached to the link bolt between the inner plates. The outer diameter of the cylindrical member is larger than the insertion hole of the inner plate through which the link bolt can pass. This allows the link bolt to be prevented from falling out of the segment when the link bolt moves in the longitudinal direction due to gravity. When a force is applied to the tongue from below, the cylindrical member is elastically deformed and can be removed from the link bolt.

A leak capture device, and methods of use, for capturing leaks from a pipeline, or a valve or flange installed in the pipeline, is provided. The device generally comprises a flexible, impermeable, fabric or sheet material, having a sufficient size and shape, and supporting means to form, when installed, a fluid leak containment reservoir pocket below the pipeline, valve, or flange to capture leaked fluid. The device is easily and quickly installed and can be sized and arranged to economically capture leaks from a wide range of pipeline/valve/flange configurations and thereby avoid negative environmental and regulatory impacts and associated costs. The device is easy to use for regular maintenance operations and can be made readily available for installation in emergency or other unscheduled events.

A leak capture device, and methods of use, for capturing leaks from a pipeline, or a valve or flange installed in the pipeline, is provided. The device generally comprises a flexible, impermeable, fabric or sheet material, having a sufficient size and shape, and supporting means to form, when installed, a fluid leak containment reservoir pocket below the pipeline, valve, or flange to capture leaked fluid. The device is easily and quickly installed and can be sized and arranged to economically capture leaks from a wide range of pipeline/valve/flange configurations and thereby avoid negative environmental and regulatory impacts and associated costs. The device is easy to use for regular maintenance operations and can be made readily available for installation in emergency or other unscheduled events.

A temporary trap door cap device for sealing around a pressure-leaking trap door at an end of a pipeline terminating in a trap includes a canister formed from a longitudinally extending pipe having an open end and a closed end; and an annular rim connected to the open end, with an inner diameter smaller than an inner diameter of the canister. The annular rim is configured such that the inner diameter of the annular rim fits over the trap door of the trap terminating the pipeline. After the annular rim has passed over the trap door, the inner diameter of the annular rim is compressible against a body of the trap terminating the pipeline so as to seal an inner volume of the canister pressure-tight thereby containing the trap door within the pressure-tight volume.

In some implementations, an apparatus comprises a pipe, a stud that is forge-welded to the pipe, creating a forge-welded stud, a bracket that is operably coupled to the forge-welded stud, and a ladder support operably coupled to the bracket.

Methods of sealing tubulars are disclosed herein, which methods may include: providing a patch plug assembly that includes: a shaft; a wedge coupled to the shaft; a slip coupled to the shaft; a plug slidably coupled to the wedge; and a ferrule disposed between the wedge and the plug; pushing the slip against the tubular; pushing the plug against the ferrule after the slip is pushed against the tubular; pushing the ferrule against the wedge after the plug is pushed against the ferrule; and pushing a plug portion of the plug against an inner surface of the tubular.

Methods of sealing tubulars are disclosed herein, which methods may include: providing a patch plug assembly that includes: a shaft; a wedge coupled to the shaft; a slip coupled to the shaft; a plug slidably coupled to the wedge; and a ferrule disposed between the wedge and the plug; pushing the slip against the tubular; pushing the plug against the ferrule after the slip is pushed against the tubular; pushing the ferrule against the wedge after the plug is pushed against the ferrule; and pushing a plug portion of the plug against an inner surface of the tubular.

A hole plug for waste water includes a protruding portion having a flange with a dish shape, and a drain hole therein; and a cylindrical portion projecting from the protruding portion and formed at an inner face side of the flange, the cylindrical portion being configured to be inserted into and pass through an attachment hole of a panel. The cylindrical portion includes an engagement leg provided in a circumference configured to detachably engage the attachment hole, a cylinder inside, and a shielding wall which is positioned above the drain hole, is larger than a horizontal cross-sectional surface of the drain hole, and is provided such that the cylinder inside and the drain hole can communicate with each other for allowing a liquid entering into an inside of a vehicle to flow into the cylinder inside and flow out to an outside of a vehicle from the drain hole.

An eversion liner for lining a pipe includes an impermeable outer portion, inner and outer strength portions inside the impermeable outer portion, and a middle portion including at least one felt layer radially between the inner and outer strength portions. At least one of the inner and outer strength portions is formed from a unitary sheet of strength material that includes parallel chopped strands of fiber. The longitudinal edge margins of the sheet of strength material are positioned in overlapping engagement and joined together by joining structure. The parallel chopped fibers can be oriented transverse to the length of the liner. The joining structure can prevent reduction in a width of the overlapped edge margins as the liner expands during eversion.