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 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.

First and second dies can be coupled to a pair of arms on a threaded rod cutting machine. The first die has a body with a front face, a rear face, a side face extending between the front face and the rear face, and a first threaded recess in the first side face and configured to receive a threaded rod to be cut. Crests and troughs of the first thread are aligned with troughs and crests of the threaded rod when the first die engages the rod. The second die has a body with a front face, a side face extending between the front face and the rear face, and a second threaded recess in the side face and configured to receive the threaded rod. Crests and troughs of the second thread are axially offset from troughs and crests of the threaded rod when the second die engages the rod.

First and second dies can be coupled to a pair of arms on a threaded rod cutting machine. The first die has a body with a front face, a rear face, a side face extending between the front face and the rear face, and a first threaded recess in the first side face and configured to receive a threaded rod to be cut. Crests and troughs of the first thread are aligned with troughs and crests of the threaded rod when the first die engages the rod. The second die has a body with a front face, a side face extending between the front face and the rear face, and a second threaded recess in the side face and configured to receive the threaded rod. Crests and troughs of the second thread are axially offset from troughs and crests of the threaded rod when the second die engages the rod.

An underwater tool (5; 205; 305) including a grabber arrangement (15; 215; 315) and a cutter arrangement (20; 220; 320) connected together. The grabber arrangement comprises a plurality of grabber elements (30; 230; 330) disposed on first and second sides (35a; 235a; 335a; 35b; 235b; 335b) of the tool. The cutter arrangement includes a cutter slot (75; 275; 375), an anvil (80; 280; 380) movable to close the slot comprises an anvil and a cutter blade (90; 290; 390). In use, a cable (10; 210; 310) is held by the grabber arrangement, and thereby moved into the slot which is then closed by the anvil so as to entrap the cable within the slot. The cutter blade is then driven against the anvil so as to cut the cable.

An underwater tool (5; 205; 305) including a grabber arrangement (15; 215; 315) and a cutter arrangement (20; 220; 320) connected together. The grabber arrangement comprises a plurality of grabber elements (30; 230; 330) disposed on first and second sides (35a; 235a; 335a; 35b; 235b; 335b) of the tool. The cutter arrangement includes a cutter slot (75; 275; 375), an anvil (80; 280; 380) movable to close the slot comprises an anvil and a cutter blade (90; 290; 390). In use, a cable (10; 210; 310) is held by the grabber arrangement, and thereby moved into the slot which is then closed by the anvil so as to entrap the cable within the slot. The cutter blade is then driven against the anvil so as to cut the cable.

A method is for cutting a tubular structure, such as a drill string, at a drill floor of a drilling rig. The method includes the following steps: i) providing a cutting tool at the drill floor comprising a non-rotatable cutting element configured for carrying out a translational cutting movement through the tubular structure; ii) positioning the cutting tool in cutting position exterior to the tubular structure; iii) fixing the position of the cutting tool with respect to the tubular structure, and iv) activating the cutting tool for cutting the tubular structure by using a translation movement of the at least one cutting element through the tubular structure. A cutting tool is for use in such method.

A method is for cutting a tubular structure, such as a drill string, at a drill floor of a drilling rig. The method includes the following steps: i) providing a cutting tool at the drill floor comprising a non-rotatable cutting element configured for carrying out a translational cutting movement through the tubular structure; ii) positioning the cutting tool in cutting position exterior to the tubular structure; iii) fixing the position of the cutting tool with respect to the tubular structure, and iv) activating the cutting tool for cutting the tubular structure by using a translation movement of the at least one cutting element through the tubular structure. A cutting tool is for use in such method.

A cutter includes a main body, a cog assembly, and a blade. The main body is provided with an anvil. The cog assembly includes a drive shaft and a first and a second cog. The drive shaft is rotatably connected to the main body. The drive shaft has a first end configured to detachably connect which a power tool. The first cog moves synchronously with the drive shaft. The second cog is rotatably connected to the main body and rotates upon rotation of the first cog. The blade is rotatably connected to the main body and connected to the second cog. The blade is rotatable between a deployment position and a cutting position and has a cutting edge. The cutting edge is disposed away from the anvil when the blade is in the deployment position, but is adjacent to the anvil when the blade is in the cutting position.

A pipe holding device, and a pipe grooving tool, comprising the pipe holding device, to form a circumferential groove on a longitudinal plastic pipe element. The pipe holding device has a dual curved frame extending from a first end to a second end defining an arcual opening for receiving the longitudinal pipe and a dual frame intermediate body located between the first end and the second end of the curved frame and substantially translationally moveable with respect to the arcual. A clamp releasably attaches to longitudinally extending body supports of the intermediate body at discrete positions with respect to the frame to accommodate pipes of different diameters within the arcual opening. The intermediate body further has an actuating adaptor located axially in the middle of the intermediate body for releasably attaching an actuating element for actuating a grooving element.