A peeling apparatus for at least partially removing an external circumferential surface of an approximately cylindrical body is provided. The peeling apparatus includes: a C-shaped or C-like shaped base body, which has two free ends to form a peripheral opening, the cylindrical body being insertable between the two free ends and positionable concentrically in relation to a center of an incircle defined by the internal face of the base body; at least one external bearing mounted on an external axis positioned at each of the free ends, the external bearing abutting the cylindrical body when the body is positioned concentrically in relation to the center of the incircle; at least one central bearing attached to or positioned on the base body, spaced apart from the free ends and on a central axis; and a blade holder into which a blade is insertable so that the blade extends beyond the incircle.

A repair device for a pipe repair device comprising at least one body extending along a main axis between a first end and a second end and telescopically expandable, in a controlled manner, along the main axis so as to bring the ends closer or further apart from each other, a first contact plate connected to the body at the first end and extending along a first plane curved transversal to the main axis, a second contact plate connected to the body at the second end and extending along a second plane curved transversal to the main axis, wherein the plates are removably constrained to the body in such a way that they can be replaced.

A repair device for a pipe repair device comprising at least one body extending along a main axis between a first end and a second end and telescopically expandable, in a controlled manner, along the main axis so as to bring the ends closer or further apart from each other, a first contact plate connected to the body at the first end and extending along a first plane curved transversal to the main axis, a second contact plate connected to the body at the second end and extending along a second plane curved transversal to the main axis, wherein the plates are removably constrained to the body in such a way that they can be replaced.

A broken pipe extraction device includes first, second, and third pressure plates, a fixing member, a fastening member, and a needle. The first pressure plate includes a first perforation and a second perforation connected to the first perforation. The second perforation passes through a side wall of the first pressure plate. The second pressure plate faces the first pressure plate. Projecting portions of the first perforation and the second perforation on the second pressure plate overlap. The third pressure plate includes a through hole. The third pressure plate is detachably received in the first perforation and the second perforation. The fixing member mounts on the second pressure plate and faces the first perforation and the second perforation. When the third pressure plate is received in the first and second perforations, the through hole faces the fixing member.

A broken pipe extraction device includes first, second, and third pressure plates, a fixing member, a fastening member, and a needle. The first pressure plate includes a first perforation and a second perforation connected to the first perforation. The second perforation passes through a side wall of the first pressure plate. The second pressure plate faces the first pressure plate. Projecting portions of the first perforation and the second perforation on the second pressure plate overlap. The third pressure plate includes a through hole. The third pressure plate is detachably received in the first perforation and the second perforation. The fixing member mounts on the second pressure plate and faces the first perforation and the second perforation. When the third pressure plate is received in the first and second perforations, the through hole faces the fixing member.

The present invention relates to an underwater drone which is an unmanned mobile which can move in the water, and more particularly to a communication system for the underwater drone which performs communication between the underwater drone and a land-based controller (or maneuvering device). The present invention also relates to an airlock apparatus for the drone which transfers the drone into or from facilities or containers, or equipment sealed (or closed) against surrounding environment. The communication system for an underwater drone includes an underwater drone (1) configured to move in the water, at least one transmitting and receiving antenna (2) provided in an area where the transmitting and receiving antenna (2) can communicate with the underwater drone (1) by wireless communication, and a controller or a maneuvering device (5) connected to the at least one transmitting and receiving antenna (2) by a wired cable (4) and configured to control the underwater drone (1).

A jet pump slip joint repair assembly includes at least one clamp and a bushing configured to be inserted in a bore of a diffuser and to surround a portion of an inlet mixer. The clamp includes a gripping surface and a gripping collar. The bushing includes a generally cylindrical sidewall, the sidewall configured to surround the portion of the inlet mixer, a grooved flange on an upper surface of the sidewall, at least one cutout between adjacent portions of the grooved flange, and a groove on an inner, bottom surface of the sidewall. The assembly also includes a seal in the groove. The seal is flexible and formed of a metallic material. The seal is configured to be compressed when the at least one clamp engages the bushing.

A jet pump slip joint repair assembly includes at least one clamp and a bushing configured to be inserted in a bore of a diffuser and to surround a portion of an inlet mixer. The clamp includes a gripping surface and a gripping collar. The bushing includes a generally cylindrical sidewall, the sidewall configured to surround the portion of the inlet mixer, a grooved flange on an upper surface of the sidewall, at least one cutout between adjacent portions of the grooved flange, and a groove on an inner, bottom surface of the sidewall. The assembly also includes a seal in the groove. The seal is flexible and formed of a metallic material. The seal is configured to be compressed when the at least one clamp engages the bushing.

Systems and methods are disclosed for protecting a tether line within a pressurized pipe. As the tether line is extended and retracted, portions of the tether line are prevented from directly engaging jagged profiles formed in the pressurized pipe.

Systems and methods are disclosed for protecting a tether line within a pressurized pipe. As the tether line is extended and retracted, portions of the tether line are prevented from directly engaging jagged profiles formed in the pressurized pipe.