A rotary cutting apparatus includes a pair of cutting tools each having a cutting blade along a tip end of its outer peripheral portion having a mountain-shaped cross section, and cuts a cylindrical material into pieces with a predetermined width by sandwiching the cylindrical material between the cutting blades so the cutting blades are respectively placed on inner and outer peripheries of the cylindrical material, and relatively rotating and moving the pair of cutting tools along an entire circumference of the cylindrical material. A second imaginary line connecting an axial center of the cylindrical material and an axial center of the inner peripheral-side cutting tool is shifted in a circumferential direction of the cylindrical material about the axial center of the cylindrical material with respect to a first imaginary line connecting the axial center of the cylindrical material and an axial center of the outer peripheral-side cutting tool.

A device used for cutting a pipe from an inside. The device has a spindle arranged to be rotated. The device further has protrusions fastened to the spindle and arranged to position the device or a part of the device inside the pipe. The protrusions have at least one blade arranged to machine material off the inner surface of the pipe to cut the pipe while the spindle is being rotated.

A device used for cutting a pipe from an inside. The device has a spindle arranged to be rotated. The device further has protrusions fastened to the spindle and arranged to position the device or a part of the device inside the pipe. The protrusions have at least one blade arranged to machine material off the inner surface of the pipe to cut the pipe while the spindle is being rotated.

A pipe expander assembly for replacing an existing pipe with a new pipe. The expander assembly has a slitter disposed about a wire rope and abutting an expander at a spherical joint. The expander comprises a cone to expand a slit pipe and is internally connected to the wire rope by jaws that expand and contract about the wire rope due to threading of a jam nut into the cone. A pipe puller is connected to the back of the expander at a clevis and is adapted for connection to a new pipe, either through a jaw system, an adaptor, or fusion to the pipe.

A pipe expander assembly for replacing an existing pipe with a new pipe. The expander assembly has a slitter disposed about a wire rope and abutting an expander at a spherical joint. The expander comprises a cone to expand a slit pipe and is internally connected to the wire rope by jaws that expand and contract about the wire rope due to threading of a jam nut into the cone. A pipe puller is connected to the back of the expander at a clevis and is adapted for connection to a new pipe, either through a jaw system, an adaptor, or fusion to the pipe.

Pipe splitting apparatuses and systems including a replaceable blade, and methods therefor, are provided. In various examples, a pipe splitting apparatus includes an outer surface including a recess. A blade including a portion is disposed within the recess. A hardenable material is disposed within the recess. The hardenable material is configured to flow upon application to fill empty space within the recess and at least partially around the portion of the blade disposed within the recess. The hardenable material is further configured to harden after application to secure the portion of the blade within the recess and fix the blade to the pipe splitting apparatus.

Pipe splitting apparatuses and systems including a replaceable blade, and methods therefor, are provided. In various examples, a pipe splitting apparatus includes an outer surface including a recess. A blade including a portion is disposed within the recess. A hardenable material is disposed within the recess. The hardenable material is configured to flow upon application to fill empty space within the recess and at least partially around the portion of the blade disposed within the recess. The hardenable material is further configured to harden after application to secure the portion of the blade within the recess and fix the blade to the pipe splitting apparatus.

An ultra-high pressure (UHP) cutting device for cutting an elongate body from outside the elongate body are disclosed herein. Embodiments of the UHP cutting device have a UHP tube with a top end and a bottom end opposite the top end, the UHP tube defining a lumen for receiving UHP fluid, a static mount for securing the cutting device to the elongate body, a rotatable mount rotatably connected to the static mount, a radially adjustable support member for adjusting a distance of the UHP tube to the elongate body, the radially adjustable support member being connected adjacent to the top end of the UHP tube and the rotatable mount, a drive in operational communication with the rotatable mount for rotating the rotatable mount during operation of the cutting device, and a cutter head in fluid communication with the UHP line. Related uses and methods are also disclosed herein.

An ultra-high pressure (UHP) cutting device for cutting an elongate body from outside the elongate body are disclosed herein. Embodiments of the UHP cutting device have a UHP tube with a top end and a bottom end opposite the top end, the UHP tube defining a lumen for receiving UHP fluid, a static mount for securing the cutting device to the elongate body, a rotatable mount rotatably connected to the static mount, a radially adjustable support member for adjusting a distance of the UHP tube to the elongate body, the radially adjustable support member being connected adjacent to the top end of the UHP tube and the rotatable mount, a drive in operational communication with the rotatable mount for rotating the rotatable mount during operation of the cutting device, and a cutter head in fluid communication with the UHP line. Related uses and methods are also disclosed herein.

A pipe-cutting tool, which can be independently pumped down to cut a wellbore pipe or casing, is disclosed. When the tool is lowered into the wellbore, a pump down ring, included in the tool, remains flush with the inner surface of the pipe. To power the tool's descent, high-pressure fluid is pumped into the wellbore. On reaching the target location, a swellable sleeve included in the tool, on being exposed to fluid in the wellbore, expands to push against the inner surface of the pipe, lodges the tool at the location, and seals any fluid flow path bypassing the tool. Thereafter, high-pressure abrasive fluid is pumped through the tool to eject in the form of high-pressure abrasive fluid jets, which cut through the wellbore pipe at the target location.