A method of using a pipe machining apparatus according to an aspect includes providing a frame capable of being mounted onto a pipe, a tool carrier coupled to and movable relative to the frame, a tool support coupled to and movable with the tool carrier relative to the frame, and a laser line generator tool mounted on and movable with the tool support. The laser line generator tool images a laser light onto the pipe to align with a mark(s) on the pipe which denotes a proper cut line around the pipe. The apparatus can be repositioned relative to the pipe in order to enable an operator to properly position the apparatus on the pipe prior to a cutting operation.

A method for cutting an inner circumferential surface of a rotating hollow cylindrical workpiece includes: holding the workpiece with a chucking device such that a side surface of the workpiece on a first side in an axial direction of the workpiece is in contact with a contact surface of the chucking device; setting an intersection angle between a rotational center line of the workpiece and an imaginary straight line to an angle smaller than 45 degrees, the straight line being parallel to an axis line of a button tip and intersecting with the rotational center line; and setting a feed direction of the button tip to the inner circumferential surface to a direction from a second side in the axial direction of the workpiece toward the first side in the axial direction thereof, and cutting the inner circumferential surface by use of the button tip rotating about the axis line.

A weld bead cutting device is configured such that, a liner made as liner portions are abutted on and welded to each other is rotated around a rotation axis extending in a direction along an abutting direction, and a weld bead is cut with a cutting tool arranged among rollers in a state where the rollers are pressed against an outer peripheral surface of the liner, the rollers being arranged on both sides of the weld bead on the liner in a direction along an extending direction of the rotation axis.

A re-facing apparatus for pipe threaded connections having independent machining stations for pin-end (male) and box-end (female) threaded connections. Among other benefits, the machining stations can be used to restore torque shoulders by machining a face of each shoulder using custom spindle and cross slides. The pipe connection re-facing apparatus can be set up over existing pipe racks and allows pipe sections to be rolled through for processing. For example, the apparatus of the present invention can be installed and utilized in proximity to a pipe storage and inspection facility, such that out-of-specification pipe connections can be re-faced without incurring significant transportation and/or machine shop expenses.

A method and apparatus for angularly drilling during a tapping procedure into a pressurized multiple strings of coaxially situated tubulars for wells and/or platforms which have overturned wherein the tapping occurs underwater via a diver or remotely operated vehicle.

The invention relates to an automatic precision worktop for drilling without deviation for cylindrical workpiece which includes a loading device, a drilling device and an uploading device. The loading device includes a first sliding rail disposed horizontally on the side of the drilling device, a loading plate disposed on the first sliding rail and slidingly engaged with the first sliding rail, and two first linkages driving the loading plate to slide on the first sliding rail. Each linkage includes a link mechanism, and a driving motor that drives movement of the link mechanism. Two sides of the loading plate are respectively provided with a third sliding rail slidably engaged with two link mechanisms. The drilling device includes a clamping device, a drilling mechanism located on the side of the clamping device and a positioning mechanism slidingly engaged with the clamping device. The uploading mechanism includes a second sliding rail parallel to the first sliding rail, an uploading plate located on the second sliding rail and engaging the second sliding rail, and two second linkages that drive the uploading plate to slide on the second sliding rail. The present invention avoids large deviation of the drill bit, which reduces the defective rate of the workpiece, and avoid unnecessary waste of cost.

A method for reducing regenerative chatter in chip-removal machines wherein a tool head (2) machines walls of a workpiece (1) by means of at least one chip-removal tool and during this machining, the tool head is vibrationally excited and a loose additional mass (m.sub.z) is moved by the vibration. The additional mass randomly touches the tool head (2) in first position or randomly has no connection to the tool head (2) in second position, and thus the total mass of the tool head (2) is randomly changed by the amount of the additional mass (m.sub.z). This change in mass of the tool head in turn changes the frequency of vibration.

Provided is a drill device for removing plugging in pipes, the drill device comprising: a drill bit for breaking plugging in pipes; a vertical control handle capable of controlling a vertical movement of the drill bit; a drill handle capable of controlling a rotational movement of the drill bit; a screw disposed coaxially with the drill bit; a drill shaft having a first portion surrounding the screw and a second portion to which the drill bit is fixed; and a guide shaft surrounding the first portion of the drill shaft, wherein: the vertical control handle and the drill handle are disposed on an extension line of the axis of the screw; the screw is vertically moved by rotations of the vertical control handle, and in conjunction therewith, the drill bit can be vertically moved; and the guide shaft is rotated by rotations of the drill handle, and in conjunction therewith, the drill bit can be rotated. The disclosed device can safely remove plugging in drain pipes even in a state where inflammable gases or liquids remain in the pipes.

Cutting tools for pipe cutting frames are disclosed. Example split frame pipe cutting tools include a frame and a slide tool configured to position a cutting edge in contact with 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.

A pipe end machining device configured to machine an end of a pipe includes an outer housing, a spindle rotatably mounted within the outer housing and configured to carry tool supports and cutting tools, a mounting assembly configured to be attached to the pipe, a stem extending from the mounting assembly and connected to the spindle by an interengagement which allows the spindle to move linearly relative to the stem, but prevents rotational movement of the spindle relative to the stem, and a locking assembly attached to the stem and configured to fix the vertical position of the outer housing and the spindle relative to the mounting assembly.