Hydril Company

Hydril LLC

David Llewellyn Mallis

Harris Allen Reynolds, Jr

Robert S Sivley, Iv

Gary Wayne Ward

Andrea L Reade-Romero

Bernard F Beaulier

Harris A Reynolds

Robert S Sivley

Harris Allen Reynolds

Robert S Iv Sivley

A tubular connection includes a pin member having external wedge threads configured to engage a box member having corresponding internal wedge threads, and a solid lubricant coating applied on at least one of the internal and external wedge threads wherein the solid lubricant coating comprises a first uniform layer of a dry corrosion inhibiting coating made of an epoxy resin containing particles of zinc and a second uniform layer of a dry lubricant coating covering the first uniform layer.

Wedge threads with a solid lubricant coating

A threaded connection includes a pin member comprising a first pin step and a second pin step, and pin wedge threads disposed on each of the first and second pin steps and a box member comprising a first box step and a second box step, and box wedge threads disposed on each of the first and second box steps, wherein an axial separation of the first and second pin steps differs from an axial separation of the first and second box steps.

Step-to-step wedge thread connections and related methods

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, a reduced clearance gap exists between the pin thread and the box thread at the at least one perturbation.

Threaded connection with perturbed flanks

A threaded pipe connection includes a pin member having an external thread increasing in width in one direction, a box member having an internal thread increasing in width in an opposite direction so that complementary internal and external threads move into engagement upon make-up of the connection, and at least one contact zone in which the pin member and box member are in sealed contact.

Wedge thread with torque shoulder

A threaded pipe connection including a pin member having an external thread increasing in width in one direction, the external thread including load and stab flanks, a box member having an internal thread increasing in width in the other direction so that complementary internal and external threads move into engagement upon make-up of the connection, the internal thread comprising load and stab flanks, a positive stop torque shoulder, and wherein the width of the internal thread and external thread are selected to provide a selected clearance at least between the internal load and stab flanks and the external load and stab flanks upon initial engagement of the positive stop torque shoulder is disclosed.

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.

Wedge thread with high-angle metal seal

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.

Floating wedge thread for tubular connection

A threaded pipe connection includes a box member, a pin member and a wear indicator for the connection. The pin member has internal threads and the box member has external threads. The internal threads of the box member each increase in width in one direction, while the external threads of the pin member increase in width in the other direction so that the complementary internal and external threads move into engagement upon make-up of the connection.

Tubular joint wear indicator

Double flex seal for tubular connection

A threaded connector includes a pin member having a large thread step and a small thread step. The pin member has a first sealing surface between the steps. Threads on the steps of the pin member each have load flanks and stab flanks. The connector includes a box member having a large thread step and a small thread step corresponding to the thread steps on the pin member. The box member has a second sealing surface corresponding to the first sealing surface. Threads on the steps of the box member have load flanks and stab flanks corresponding to the threads on the pin member. The threads on the large thread step have a first clearance between corresponding stab flanks on the pin and box members when the pin and box members are assembled and the corresponding load flanks are engaged. The threads on the small step have a second clearance between corresponding stab flanks when the pin and box members are assembled. The first clearance in one embodiment is smaller than the second clearance.

Two-step threaded connector having differential thread width

In a threaded connector, a box member has at least two tapered, internal, generally dovetail-shaped threads. The internal threads each having stab flanks, load flanks, roots, crests and a wedge ratio and increasing in width in one direction. A pin member has at least two tapered, external, generally dovetail-shaped threads. The external thread has stab flanks, load flanks, roots, crests and a wedge ratio and increases in width in the other direction so that complementary roots and crests of the internal and external threads move into engagement during make-up of the connection in conjunction with the moving of complementary stab and load flanks into engagement upon make-up of the connection. The wedge ratio of one thread is an aggressive wedge ratio with a larger magnitude and the wedge ratio of the another thread is a conservative wedge ratio with a smaller magnitude. Alternatively, a box member has a tapered, internal, generally dovetail-shaped thread incorporated in a two-step configuration and a pin member has a tapered, external, generally dovetail-shaped thread incorporated in two-step configuration. The wedge ratio of one step is an aggressive wedge ratio with a larger magnitude and the wedge ratio of the other step is a conservative wedge ratio with a smaller magnitude.

Differential wedge thread for threaded connector

A threaded pipe connection includes a box member and a pin member. The box member has multiple internal, generally dovetail-shaped threads, each with stab flanks, load flanks, roots, and crests. The pin member also has multiple external, generally dovetail-shaped threads, each with stab flanks, load flanks, roots, and crests. The internal threads of the box member each increase in width in one direction, while the external threads of the pin member increase in width in the other direction so that the complementary flanks of the respective threads move into engagement upon make-up of the connection.

Multi-start wedge thread for tubular connection

A threaded pipe connection is disclosed for connecting two joints of pipe having externally threaded pin members, one pin member having external right-hand threads and the other pin member having left-hand threads. An internally threaded coupling having right and left-hand threads that mates with the threads on the pin members. An internal pressure seal ring is positioned to provide a seal between the ends of the pin members. A plurality of mating lugs and grooves on the ends of the pin members hold the pins from relative rotation when the connection is being made up. A metal-to-metal seal located between each pin member and the coupling adjacent each end of the coupling isolates the threads of the connection from the ambient environment thus sealing off the pipe annulus from external pressure due to hydrostatic head. Indicia such as engaging surfaces or aligned scribe lines on the pin members ensure that the sealing surfaces on the coupling and the pin members that form the external seals are positioned to properly engage and form seals when the connection is made up.

Growing community of inventors

The Woodlands, TX, United States of America

David Llewellyn Mallis