HYDRIL COMPANY Patent applications |
Patent application number | Title | Published |
20130219686 | STEP-TO-STEP WEDGE THREAD CONNECTIONS AND RELATED METHODS - 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. | 08-29-2013 |
20120074693 | STEP-TO-STEP WEDGE THREAD CONNECTIONS AND RELATED METHODS - 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. | 03-29-2012 |
20120074690 | STEP-TO-STEP WEDGE THREAD CONNECTIONS AND RELATED METHODS - 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. | 03-29-2012 |
20120038147 | WEDGE THREADS WITH A SOLID LUBRICANT COATING - 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. | 02-16-2012 |
20110084477 | WEDGE THREADS WITH A SOLID LUBRICANT COATING - 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. | 04-14-2011 |
20100156099 | THREADS WITH PERTURBATIONS - A threaded connection includes a pin member including a pin thread having a pin thread crest, a pin thread root, a pin load flank, and a pin stab flank, and a box member including 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. Upon a selected make-up of the pin member with the box member, a localized clearance or a localized interference exists between the pin thread and the box thread at the at least one perturbation, wherein the localized clearance between the pin thread and the box thread exists across substantially the entire pin thread crest or substantially the entire box thread crest, and wherein the localized interference between the pin thread and the box thread exists across substantially the entire pin thread crest or substantially the entire box thread crest. | 06-24-2010 |