Transport system makes it possible to transport a pipe of any length and with the required quality to the location of the use of the pipe. The transport system for a pipe has a transport platform, a receptacle for the pipe, wherein the receptacle is configured in such a manner that the pipe may be received coiled on the receptacle, a drive, wherein the drive is configured in such a manner that the pipe may be conveyed by the drive in a transport direction, and a straightening device, wherein the straightening device is configured in such a manner that the pipe can be straightened with the straightening device. The receptacle, the drive and the straightening device are arranged on the transport platform in such a manner that the pipe may be drawn automatically from the receptacle and fed to the straightening device by the drive.

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.

An articulation joint manufacturing process comprises cutting an elongated tube to form a multiplicity of links wherein adjacent links are connected by a bridge. The method comprises forming a fracturable portion on each bridge and connecting a multiplicity of springs to adjacentts links to form a workpiece. The method further comprises applying a torsional force to the workpiece about its longitudinal axis to fracture each bridge to form an articulation joint comprising a series of links wherein adjacent links are connected by at least one spring. Certain steps are formed by a laser. In one method, the springs are positioned on a mandrel and the springs are welded to the workpiece. The fracturable portion on the bridges may be produced by forming an indentation which may be a score, a perforation, an elongated indentation or an oval shaped indentation.

An articulation joint manufacturing process comprises cutting an elongated tube to form a multiplicity of links wherein adjacent links are connected by a bridge. The method comprises forming a fracturable portion on each bridge and connecting a multiplicity of springs to adjacentts links to form a workpiece. The method further comprises applying a torsional force to the workpiece about its longitudinal axis to fracture each bridge to form an articulation joint comprising a series of links wherein adjacent links are connected by at least one spring. Certain steps are formed by a laser. In one method, the springs are positioned on a mandrel and the springs are welded to the workpiece. The fracturable portion on the bridges may be produced by forming an indentation which may be a score, a perforation, an elongated indentation or an oval shaped indentation.

A pipe cutting machine comprises: rotary blades in a pair, with a plane at a right angle to a center line of a pipe, the rotary blades being arranged to face each other on both sides of a y axis in such a manner that blade edges of the rotary blades overlap each other in an x-axis direction; a straightforward driving mechanism that drives the rotary blades straightforward in opposite directions of a y-axis direction so as to make the rotary blades pass each other on the x axis and in the vicinity of the x axis; and power direction conversion mechanisms that move the rotary blades outwardly to get farther from the y axis for avoiding interference between the blade edges when the rotary blades pass each other on the x axis and in the vicinity of the x axis.

A pipe cutting machine comprises: rotary blades in a pair, with a plane at a right angle to a center line of a pipe, the rotary blades being arranged to face each other on both sides of a y axis in such a manner that blade edges of the rotary blades overlap each other in an x-axis direction; a straightforward driving mechanism that drives the rotary blades straightforward in opposite directions of a y-axis direction so as to make the rotary blades pass each other on the x axis and in the vicinity of the x axis; and power direction conversion mechanisms that move the rotary blades outwardly to get farther from the y axis for avoiding interference between the blade edges when the rotary blades pass each other on the x axis and in the vicinity of the x axis.

A tool configured to cut a workpiece includes a tool head which has a receiving contour in which the workpiece is received, and a movable cutting edge with a cutting contour. In the course of a cutting process, the cutting edge passes through the receiving contour. The cutting edge is subjected to the effect of an advancement part and can be moved to such an extent in the cutting direction(s) that it can pass all the way through the workpiece. In an embodiment, a position of the cutting edge reached after the cutting edge has passed all the way through the workpiece, the cutting edge, with removal from the advancement part, can be moved out from the cutting direction(s).

Example split frame pipe cutting tools include a frame and a slide tool configured to position a cutting edge in contact with the workpiece to performing cutting or boring on the workpiece, the slide tool comprising: a radial advancement mechanism configured to provide radial advancement of the cutting edge based on circumferential advancement of the slide tool by the frame; and an axial guide rail; a recirculating bearing carriage configured to slide in an axial direction along the axial guide rail and to couple the cutting edge to the axial guide rail; an axial advancement mechanism configured to advance the cutting edge in the axial direction with respect to the workpiece by translating radial advancement by the radial advancement mechanism to axial advancement based on a cutting template coupled to the radial advancement mechanism.

Example split frame pipe cutting tools include a frame and a slide tool configured to position a cutting edge in contact with the workpiece to performing cutting or boring on the workpiece, the slide tool comprising: a radial advancement mechanism configured to provide radial advancement of the cutting edge based on circumferential advancement of the slide tool by the frame; and an axial guide rail; a recirculating bearing carriage configured to slide in an axial direction along the axial guide rail and to couple the cutting edge to the axial guide rail; an axial advancement mechanism configured to advance the cutting edge in the axial direction with respect to the workpiece by translating radial advancement by the radial advancement mechanism to axial advancement based on a cutting template coupled to the radial advancement mechanism.