A threaded coupling suitable for drilling oil and gas wells is provided. The threaded coupling having a first end and a second end. A first portion of the threaded coupling proximal to the first end can have a first thread profile, and a second portion of the threaded coupling proximal to the second end can have a second thread profile that is different from the first thread profile. In particular, at least two threads of the second thread profile proximate to the second end are reduced in height according to an extra machining angle. The first thread profile and the second thread profile can further be tapered according to a taper angle.

A fire hydrant nozzle includes an annular sleeve, which has an annular wall, an inlet end, and an outlet end. The inlet end has a fire hydrant connection element extending from the inlet end and configured to couple with a fire hydrant outlet. The fire hydrant connection element has a portion protruding radially inward, the portion protruding radially inward configured to be moved with respect to the outlet end to connect with the fire hydrant outlet. Another embodiment includes an inlet end and an outlet end, the outlet end configured to couple with a fire hose, the inlet end having a fire hydrant connection element and a first portion with a wall thickness less than a wall thickness of the outlet end. The first portion of the inlet end is configured to be bent to facilitate movement of the fire hydrant connection element into connection with a fire hydrant.

A gas pipe joint contains: a connection pipe, a first threaded pipe, and a second threaded pipe. The connection pipe includes a first part and a second part, the first part has a first threaded orifice, and the second part has a second threaded orifice. The first threaded pipe includes a first coupling section, a first nut section, and a second coupling section. The second threaded pipe includes a second nut section and a third coupling section, the second nut section has a second screwing portion, and the third coupling section has at least one second recessed portion and a second groove. The third coupling section has a second shoulder. The second shoulder has a second lower gasket. The first groove has two first loops, and the second groove has two second loops.

A method for coupling a first tubular component including a threaded portion with a second tubular component including a threaded portion, which includes: engaging the first tubular component on the second tubular component; rotating the first tubular component relative to the second tubular component in order to screw the threaded portions together; obtaining a set of points constituting a curve that represents the torque applied during the screwing of the first tubular component until an end position as a function of the number of turns performed by the first tubular component relative to the second tubular component; comparing parameters of the curve obtained with one or more reference curve(s) of a database in which each reference curve is associated with an assessment of the quality of the coupling; and assessing the quality of the coupling according to the step of comparing the curve.

A tubular member includes a tube body, a tube end, an exterior surface, an interior surface, a nominal wall thickness, a longitudinal axis, a welded seam, and a patch of material. The welded seam forms an arcuate portion of the interior surface, and the patch covers a portion of the interior surface that includes a portion of the welded seam, extending from the tube end to an axially spaced first location. The resulting interior surface from the tube end to the axially spaced first location has a uniform inside diameter.

A method of converting a tubular having NC46 connections to CET43 connections. A method of applying a CET43 thread to a pin connection or a box connection or both. A box connection and a pin connection of the tubular are machined and a CET43 thread applied to the box connection and the pin connection.

An instrumented coupling for pipe joints is described herein. The instrumented coupling includes a first threaded end configured to thread to a first pipe joint and a second threaded end configured to thread to a second pipe joint. The instrumented coupling also includes a sensor configured to obtain a measurement of a parameter of a well and a communications device configured to communicate to a receiving device outside of the well. The instrumented coupling further includes a processor configured to execute instructions in a data store. The instructions direct the processor to read the measurement from the sensor, compare the measurement from the sensor to a preset limit, and generate a signal within the communications device based, at least in part, on the measurement.

A threaded fitting comprising a first plurality of threads from a first end of the fitting to a transition thread and a second plurality of threads from the transition thread to a second end of the fitting. The first plurality of threads is configured to provide a labyrinth type seal minimizing the migration of at least dust and/or gases across a thick-walled enclosure. The second plurality of threads is configured to engage a lock-nut in thin-walled enclosures, or a plurality of pre-formed threads within an aperture of thick-walled enclosures, for minimizing the migration of at least fluids/water across one of the thin- or thick-walled enclosure. The first and second plurality of threads are serially-arranged and may be used either thin or thick-walled enclosures to retard a passage of at least one of either gas, fluid, dust and flame.

A screw joint in which an efficient screw length of a joint portion is achieved. This screw joint is for an oil well pipe of an integral type and includes: (i) a pin that is provided with a male screw portion which is a male taper screw, at one end of a steel pipe; and (ii) a box that is provided with a female screw portion which is a female taper screw fitted to the male screw portion, at one end of the steel pipe, in which a structure, in which the pin and the box are in metal contact with each other to seal a fluid, is provided at least at one place of a seal portion on an outer peripheral surface side of a pipe end side of the pin and a seal portion on an inner peripheral surface side of a pipe end side of the box

A drill pipe comprises a drill pipe body having a drill pipe body outer diameter and a drill pipe body inner diameter, wherein the drill pipe body outer diameter is from about 5.1-inches to about 5.4-inches and the drill pipe body inner diameter is from about 4.4-inches to about 4.6-inches; and a tool joint comprising a rotary shoulder box connection; wherein the drill pipe has an average diameter ratio and wherein the average diameter ratio is from about 1.32 to about 1.58 for a production hole from about 7-inches to about 12-inches. Methods of using the drill pipe are also disclosed.