Abstract: A tubular connection and methods of manufacturing a box member. The tubular connection includes a box member that includes an internal thread and a pin member that includes an external thread. The external thread is adapted to threadedly engage the internal thread. A substantially helical groove is formed on an outer surface of the box member. The method of manufacturing the box member includes selecting an outer diameter for a box member that causes the tool joint to have a greater than a selected bending strength ratio. A helical groove is formed on the outer diameter of the box member such that the helical groove reduces the bending strength ratio to be about the selected bending strength ratio. An internal thread is formed on an internal surface of the box member. Another method of manufacturing the box member includes forming an internal thread on an internal surface of a cylinder and forming a substantially helical groove on an outer surface of the cylinder.

Abstract: A method for making-up a wedge thread connection comprising a pin member and a box member includes applying a pipe dope to at least one of the pin member and the box member, wherein the pin member and the box member comprise corresponding wedge threads, reducing the viscosity of the pipe dope at least temporarily, and rotating the pin member relative to the box member to make-up the wedge thread connection, wherein the rotation occurs while the viscosity of the pipe dope is at least temporarily reduced. A collar to be used with a tong assembly in making-up a threaded connection between a pin member and a box member includes at least one power unit configured to temporarily reduce the viscosity of pipe dope applied to at least one of the pin member and the box member, and an inner surface having a selected diameter to correspond to an outer diameter of at least one of the pin member and the box member.

Abstract: A threaded connection includes a pin member providing a single external thread comprising a first external portion and a second external portion, a box member providing a single internal thread comprising a first internal portion and a second internal portion, and a radial metal-to-metal seal to seal between the pin member and the box member, wherein the first and second internal portions threadably correspond with the first and second external portions, and wherein the first internal and external portions are characterized by a first wedge ratio and the second internal and external portions are characterized by a second wedge ratio, wherein the first wedge ratio is less than the second wedge ratio.

Abstract: Threaded connections including a pin member and a box member and a sealing metal. The pin member and the box member have wedge threads formed thereon, and the sealing metal is disposed between the wedge threads of the pin member and the box member. The sealing metal has a melting point lower than a tempering temperature of the pin member and the box member.

Abstract: A tubular connection is provided with a first thread on a first step having an initial makeup location and a second thread on a second step, the second thread being a wedge thread and having a selected clearance on stab and load flanks at the initial makeup location of the first thread.

Abstract: A threaded connection includes a pin member including a continuous external wedge thread having a first pin step, a mid pin step, and a second pin step and a box member including a continuous internal wedge thread having a first box step, a mid box step, and a second box step. The first pin step and the first box step correspond at a first wedge ratio, the mid pin step and the mid box step correspond at a transition wedge ratio, and the second pin step and the second box step correspond at a second wedge ratio. Upon selected make-up of the pin member with the box member, a clearance exists between corresponding thread flanks of at least a portion of the threaded connection.

Abstract: A method of treating a threaded connection that includes determining a treating time sufficient to form a thickness of a hopeite coating, coating at least a portion of the threaded connection with phosphating compound for a period of time sufficient to form the thickness of the hopeite coating is described.

Abstract: A threaded connection includes a first tubular, a second tubular, and a coupling. The first and second tubulars include external threads, a pin nose, a pin nose surface, a pin shoulder surface, and a pin seal surface located between the pin nose and pin shoulder surfaces. The coupling includes two internal threads corresponding to the external threads of the first and second tubulars and an inner seal support. Upon selected make-up, the pin noses overlap and contact occurs between the pin nose seal surfaces and the inner seal support is in an overlapping axial position with respect to the pin noses such that a diametrical gap exists therebetween.

Abstract: A threaded connection including a pin member and a box member, and methods for manufacturing and forming said threaded connection. The pin member has a pin thread with a pin thread crest, a pin thread root, a pin load flank, and a pin stab flank. The box member has a box thread with a box thread crest, a box thread root, a box load flank, and a box stab flank. At least one of the pin thread crest, the pin load flank, the pin stab flank, the box thread crest, the box load flank, and the box stab flank has at least one perturbation formed thereon. Upon a selected make-up of the pin member with the box member, an increased contact stress exists between the pin thread and the box thread at the at least one perturbation.

Abstract: Tubular connections and methods of designing tubular connections having selected root/crest clearance when the box member and pin member are made-up. When the tubular connection is radially expanded, a thread seal is formed over at least part of the tubular connection.

Abstract: An electrically-insulative threaded connection includes a pin member having a pin thread and a box member having a box thread. An insulating composite layer is disposed between the pin thread and the box thread. The insulating composite layer includes an insulating fiber and insulating resin. The pin thread and the box thread are wedge threads. A method of making an electrically-insulative threaded connection includes forming a pin wedge thread on a pin member and winding a filament over the pin wedge thread. The filament is wetted with a resin, thereby forming a composite layer. The composite layer is cured and machined to mate with a box wedge thread.

Abstract: A threaded connection between adjacent tubular members includes a pin member providing an external wedge thread and a box member providing an internal wedge thread, wherein the internal wedge thread corresponds with the external wedge thread. Further, the threaded connection includes at least one interruption along a helical thread length of one of the external wedge thread and the internal wedge thread and at least two regions along an axial length of the threaded connection where the external wedge thread and the internal wedge thread form a thread seal.

Abstract: An electrically-insulative threaded connection includes a pin member having a pin thread and a box member having a box thread. An insulating composite layer is disposed between the pin thread and the box thread. The insulating composite layer includes an insulating fiber and insulating resin. The pin thread and the box thread are wedge threads. A method of making an electrically-insulative threaded connection includes forming a pin wedge thread on a pin member and winding a filament over the pin wedge thread. The filament is wetted with a resin, thereby forming a composite layer. The composite layer is cured and machined to mate with a box wedge thread.

Abstract: A threaded connection includes a pin member including a continuous external wedge thread having a first pin step, a mid pin step, and a second pin step and a box member including a continuous internal wedge thread having a first box step, a mid box step, and a second box step. The first pin step and the first box step correspond at a first wedge ratio, the mid pin step and the mid box step correspond at a transition wedge ratio, and the second pin step and the second box step correspond at a second wedge ratio. Upon selected make-up of the pin member with the box member, a clearance exists between corresponding thread flanks of at least of a portion of the threaded connection.

Abstract: A method to design an oilfield tubular string for a well includes determining the corrosiveness of fluids in the well and selecting an alloy for the oilfield tubular string, such that a corrosion resistance and a yield strength of the alloy may be varied through a heat treatment process, heat treating the alloy to survive the determined well fluid corrosiveness and determining the yield strength of the heat treated alloy, and selecting a diameter, a wall thickness, and a connection type for the oilfield tubing string based on the determined yield strength.

Abstract: Threaded connections including a pin member and a box member and are mismatched. The pin member and the box member have wedge threads formed thereon with a gap formed between pin and box load flanks and/or pin and box stab flanks of the threaded connection. The mismatch may comprise different flank angles and/or different flank profiles between corresponding flanks.

Abstract: A threaded connection includes a pin member having a pin thread having a pin thread crest, a pin thread root, a pin load flank, and a pin stab flank, a box member having a box thread having a box thread crest, a box thread root, a box load flank, and a box stab flank, wherein at least one of the pin thread crest, the pin thread root, the box thread crest, and the box thread root has at least one perturbation formed thereon, and wherein upon a selected make-up of the pin member with the box member, at least one of a localized clearance or a localized interference exists between the pin thread and the box thread at the at least one perturbation.

Abstract: A method to manufacture a tubular connection includes calculating an engaged thread area of one of a pin member and a box member of a proposed wedge-thread connection, multiplying the calculated engaged thread area by a dope thickness factor to obtain a target free volume for the proposed wedge-threaded connection, and constructing the manufactured wedge-threaded connection having a total clearance gap volume substantially equal to the target free volume.

Abstract: Threaded connections including a pin member and a box member and a sealing metal. The pin member and the box member have wedge threads formed thereon, and the sealing metal is disposed between the wedge threads of the pin member and the box member. The sealing metal has a melting point lower than a tempering temperature of the pin member and the box member.

Abstract: A method for manufacturing a connection for composite tubing is disclosed. The method includes maintaining tension on the composite fibers while “winding in” the connector to the composite tubing. The tension on the fibers results in the fibers bridging across traps of the connector as they are being wound. The bridging results in improved load bearing characteristics of the connection.