| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 285334000 | Flat crest | 34 |
| 20080217916 | Threaded joint for steel pipes - A threaded joint for steel pipes comprised of a pin | 09-11-2008 |
| 20080277932 | Screw Connection and a Wire Thread Insert Therefore - A screw connection comprising a wire thread insert | 11-13-2008 |
| 20080277933 | THREAD FORM FOR TUBULAR CONNECTIONS - A thread form is shown which is used to make a threaded pipe connection capable of being screwed together and subsequently unscrewed. A pin member is provided having external threads with stab flanks and load flanks and flat crests and roots for mating with the mating internal threads of a box member to make up a pipe connection. One of the stab or load flanks is made up of two facets and three radii. The other selected flank is made up of three facets and four radii, giving it irregular features forming a complex geometric profiles. The thread form can be used to form a premium threaded connection which is used with such tubulars as casing and tubing for oil, gas, water and waste disposal wells. | 11-13-2008 |
| 20080296894 | OILFIELD THREADED CONNECTIONS - A threaded oilfield tubular connection includes a box connector | 12-04-2008 |
| 20080303275 | THREADED CONNECTION - A threaded connection includes an externally threaded pin connection and an internally threaded box connection. The pin connection has a proximate end, a distal end, a pin shoulder at the proximate end and a distal contact surface at the distal end. The box connection has a proximate end, a distal end, an internal contact surface at the proximate end and an external shoulder at the distal end. At least one deformable element is positioned either between the pin shoulder of the pin connection and the external shoulder of the box connection or between the distal contact surface of the pin connection and the internal contact surface of the box connection. The deformable element is of a softer material than that of the pin connection and the box connection, such that the deformable element deforms in response to a momentary torque overload. | 12-11-2008 |
| 20090045623 | CONNECTOR PART FOR CONNECTING A MATERIAL SUPPLY DEVICE TO A SPRAY GUN - A connector part ( | 02-19-2009 |
| 20090058085 | OILFIELD TUBULAR CONNECTION WITH INCREASED COMPRESSION CAPACITY - A threaded oilfield tubular connection | 03-05-2009 |
| 20090200798 | Tubular threaded joint - A tubular threaded joint which has excellent resistance to compression and which permits easy tightening operation in the field in a vertical state comprises a pin having a male threaded zone and a box having a female threaded zone. The pin or the box has an end shoulder surface on its end, and the other member has a shoulder surface which abuts against the end shoulder surface. The screw threads of the male threaded zone and the female threaded zone are trapezoidal threads having a crest, a load flank, and a stabbing flank. The lip length, which is the distance in the axial direction of a member having an end shoulder surface between the end shoulder surface and the closest engaged thread to that surface, is at least 140 times the stabbing flank clearance, which is the distance in the axial direction between the stabbing flanks of the male thread and the female thread when the load flanks of the male and female threads contact each other. The stabbing flank of the male thread is preferably chamfered. | 08-13-2009 |
| 20100078936 | THREADED JOINT FOR STEEL PIPES - A threaded joint for steel pipes constituted by a pin having male threads and a box having female threads is improved with respect to ease of insertion of the pin and galling resistance of the threaded portions. The stabbing flanks of the threads in a complete thread portion of one of the pin and a box has a two-step stabbing shape having a chamfer. The two-step stabbing shape has a stabbing flank angle α of 5-45° and a chamfer angle β of 20-60°. The ratio h/H of the chamfer height h to the thread height H of the pin is 0.25-0.50, or the ratio of the cross-sectional area of the chamfered portion to the overall cross-sectional area of the stabbing flank is made at least a value corresponding to a chamfer height ratio h/H of 0.25 and at most a value corresponding to a chamfer height ratio of 0.50. | 04-01-2010 |
| 20100102553 | THREADED TUBULAR CONNECTION WHICH IS LEAK-PROOF UNDER INTERNAL AND EXTERNAL SUCCESSIVE PRESSURE LOADS - A threaded tubular connection that is leak-proof for internal and external successive pressure loads including a male element and a female element. At least one of the male or female elements includes a lip between the threading and the free end of the element. The lip includes a first zone with a peripheral surface turned towards the other element on which a first metallic sealing surface is disposed that can be radially interference fitted against a corresponding second metallic sealing surface disposed on the other element. The lip includes a second zone located axially between the first zone and the corresponding threading. The radial stiffness of the second zone is less than that of the first zone and that of a third zone adjacent to the second zone in the direction of the threading, and the second zone can be radially deformed by a pressure exerted thereon. | 04-29-2010 |
| 20100123311 | Cylindrical Tapered Thread Form for Tubular Connections - A thread form is shown which is used to make a threaded connection between two tubular members and which is capable of being screwed together and subsequently unscrewed. A pin member is provided having external threads with stab flanks and load flanks and flat crests and roots for mating with the mating internal threads of a box member to make up a pipe connection. The thread crests on the pin member are cylindrical with respect to a central longitudinal axis of the tubular member while the thread roots are cut on a taper so that the height of the threads vary over the length of the thread form. The threads on the pin and box members can also be cut oppositely so that respective members of the thread forms are mirror images of each other. | 05-20-2010 |
| 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 |
| 20100171306 | THREADED ELEMENT OF A COMPONENT WITH OPPOSED THREADING PORTIONS AND CORRESPONDING TUBULAR THREADED CONNECTION - A threaded element of a component includes at least first and second threading portions each including threads each including a stabbing flank and a loading flank. The stabbing flanks and loading flanks of the threads of the first threading portion and the threads of the second threading portion are inclined in an opposed manner with respect to the radial direction. | 07-08-2010 |
| 20100181762 | SUPER HIGH TORQUE DOPE-FREE THREADED JOINT - A high torque threaded joint comprising a box member having threads and a pin member having threads ( | 07-22-2010 |
| 20100181763 | WEDGE THREAD WITH TORQUE SHOULDER - 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. | 07-22-2010 |
| 20110012349 | Arrow-Shaped Thread Form for Tubular Connections - A thread form is shown which is used to make a threaded pipe connection capable of being screwed together and subsequently unscrewed. A pin member has external threads with stab flanks and load flanks and flat crests and roots for mating with the mating internal threads of a box member to make up a pipe connection. The stab flanks and load flanks form a distinct geometric profile which is arrow-shaped when viewed in profile. The arrow profile can be cut in either of two opposite directions. Each profile includes only two facets with the facets on the stab flank and the facets on the load flank both leaning in the same direction with respect to the longitudinal axis of the pipe, when viewed in profile. | 01-20-2011 |
| 20110084483 | TUBULAR JOINT HAVING WEDGE THREADS WITH SURFACE COATING - A threaded joint for pipes includes a pin member and a box member, the pin member having an external thread configured to correspond to an internal thread of the box member, a thread form of the internal and external threads having generally dovetail-shaped profile with stab flanks and load flanks and flat roots and crests, wherein the internal threads are increasing in width in one direction on the box and the external threads are increasing in width in the other direction on the pin, so the roots, crests, and flanks of the threads move together and form seals that resist the flow of fluids between the seals. The threaded joint further includes a fluoropolymer-based coating applied to specific regions of the internal and external threads and a resin coating disposed in regions of the internal and external threads that are devoid of the fluoropolymer-based coating, wherein the fluoropolymer-based coating and the resin coating are configured to form a layer of substantially uniform thickness on the overall surface of the internal and external threads. | 04-14-2011 |
| 20110115218 | Drill stem tubular connection with internal stiffener ring - A threaded pipe coupling is shown for a drill pipe used in horizontal boring operations utilizing a special form of a threaded connection with an internal stiffener ring which eliminates the need for hot forging operations. The pipe coupling is used for joining an upset region of a first tubular member to a further tubular member of lesser external diameter. The internal stiffener ring is received within the internal bore of the pin end of the coupling and underlies and extends along a portion of its length. The stiffener ring having an innermost extent terminating in an exposed end which is received upon an internal shoulder provided in the mating internally threaded box end. The stiffener ring also has an external shoulder formed at the innermost extent thereof which traps the pin face between the ring exterior and the box threaded interior. | 05-19-2011 |
| 20110156385 | Pipe Connection - The invention relates to a pipe connection, particularly a gas-tight pipe screw connection, wherein the parts in the connecting region are connected by means of joining according to DIN 8593 by way of contact-pressing and insert-pressing, comprising an inner pipe part (I) and an outer pipe part (A), or two inner pipe parts (I) having an outer collar (A). In order to improve the usage properties in practice in the field, particularly in order to maintain the tightness of the respective pipe connection with combined loading, according to the invention the connection is established using three regions, wherein the connecting regions of the press fit ( | 06-30-2011 |
| 20120068458 | THREATED CONNECTION FOR DRILLING AND OPERATING HYDROCARBON WELLS - A set for manufacturing a threaded connection, including first and second tubular components with an axis of revolution, one of their ends including a threaded zone formed on the external or internal peripheral surface of the component depending on whether the threaded end is of male or female type, the ends finishing in a terminal surface. The threaded zones include, over at least a portion, threads including, viewed in longitudinal section passing through the axis of revolution of the tubular components, a thread crest, a thread root, a load flank, and a stabbing flank, the width of the thread crests of each tubular component reducing in the direction of the terminal surface of the tubular component under consideration, while the width of the thread roots increases, profiles of the load flanks and/or the stabbing flanks of the male and female threaded zones, viewed in longitudinal section passing through the axis of revolution of the tubular components, each having at least one identical portion such that the male and female threads can be fitted one into the other over the identical portions when the first and second tubular components are made up one into the other. The identical portions of the male and female ends are radially offset with respect to each other. | 03-22-2012 |
| 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 |
| 20120286507 | THREADED CONNECTION - A threaded connection used in exploration and operation of hydrocarbon wells includes first and second tubular components, including respective male and female ends and threaded zones. The threaded zones include respective male and female threads, the threads including a root, a crest, a stabbing flank, and a load flank. A groove is provided in the load flank of the threaded zone of the female end and/or the male end respectively, adjacent to the root, and a boss projects axially from the load flank of the threaded zone of the male end and/or respectively from the female end adjacent to the crest, the boss including a convex and concave surfaces. The boss is housed in the groove with, in a connected state, a radial clearance between the concave surface and the groove and an axial clearance between the end of the boss and the bottom of the groove. | 11-15-2012 |
| 20130015657 | TUBULAR THREADED CONNECTION - A threaded tubular connection including a first tube and a second tube is provided. The first tube includes a pin member which extends from an end of a main body of the first tube to a terminal end of the first tube. The second tube includes a box member which extends from an end of a main body of the second tube to a terminal end of the second tube. A cross-sectional area of a pin critical cross-section is within approximately ±5% of cross-sectional area of a box critical cross-section of the box member. The cross-sectional areas of each of the pin and box critical cross-sections are within approximately ±5% of the sum of the cross-sectional areas of a box intermediate critical cross-section of the box member and a pin intermediate critical cross-section of the pin member. | 01-17-2013 |
| 20130119657 | THREADED PIPE CONNECTOR - A threaded pipe connector, including: a pipe body including an external thread on one end; and a coupling including an internal thread on a corresponding end. Both the external thread and the internal thread are buttress threads capable of matching with each other. A ratio of thread height to pitch is 0.25-0.35, bearing surface angle is −15-3°, and guide surface angle is 10-50°. A clearance is provided between a thread crest and a thread root after engagement of the external and internal threads. A sealing area between the pipe body and the coupling includes in sequence a first cylindrical transitional area, a cylindrical sealing area, a secondary cylindrical transitional area, a conical sealing area, and a conical transitional area. Tapers of both sides of the conical sealing area are the same. One end of the conical transitional area is connected with a torque shoulder. | 05-16-2013 |
| 20140084582 | TUBULAR THREADED CONNECTION - A threaded tubular connection includes a first tube and a second tube. The first tube includes a pin member and the second tube includes a box member. A cross-sectional area of a pin critical cross-section is within approximately ±5% of cross-sectional area of a box critical cross-section of the box member. The cross-sectional areas of each of the pin and box critical cross-sections are within approximately ±5% of the sum of the cross-sectional areas of a box intermediate critical cross-section of the box member and a pin intermediate critical cross-section of the pin member. In a made-up state, a first seal surface on the pin engages a second seal surface on the box in a radial direction so as to form an off-center fluid tight seal that extends in an axial direction of the threaded tubular connection. | 03-27-2014 |
| 20140145433 | TUBULAR CONNECTION WITH HELICALLY EXTENDING TORQUE SHOULDER - A tubular connection includes a pin member and a box member. The pin member has a first thread structure and a helical torque shoulder spaced axially along the pin member from the first thread structure. The box member has a second thread structure and a second helical torque shoulder spaced axially along the box member from the second thread structure. The first thread structure and the second thread structure are sized and located to control a stab position of the tubular connection, and in the stab position the first helical torque shoulder does not engage or axially overlap with the second helical torque shoulder. A method of joining tubular members utilizing a helical torque shoulder is also provided. | 05-29-2014 |
| 20140265320 | SEALED PIPE JOINT - In a pipe joint where two pipe sections ( | 09-18-2014 |
| 20140333065 | Threaded Tool Joint Connection - In a double-shoulder threaded tool joint connection, the pin external threads and the box internal threads have a thread taper between 0.75 inch per foot and 1.0 inch per foot. The pin external threads and the box internal threads have equal stab flank and load flank angles, and are in a range from thirty-three to thirty-nine degrees. Both the pin external threads and the box internal threads have roots formed in a shape of a portion of a circle tangent to both thread flanks with a minimum radius of 0.063 inch. The pin external threads and the box internal threads are in the range of two to three per inch. The box counterbore has a length of 0.750 or less. The pin nose has a length in a range of 30% to 90% of the length of the box counterbore. | 11-13-2014 |
| 20150008667 | TIGHTLY THREADED JOINT FOR OIL FIELD PIPES - A threaded joint for oil field pipes includes a male pipe having a male thread and a female pipe having a female thread. The male thread and the female thread engage along a thread profile, the male pipe with a first end face and the female pipe with a second end face. The male pipe also has as first sealing surface and the female pipe has a second sealing surface. The first end face and second end face are substantially perpendicular to the first sealing surface and second sealing surface. When the male pipe and female pipe are fully adjoined, the first sealing surface abuts the second sealing surface, the first end face abuts the second end face, and the trailing face abuts female thread, while leaving a space between the female thread and the top face, and leaving a space between the female thread and the leading face. | 01-08-2015 |
| 20150035274 | CONNECTOR ASSEMBLY - The invention provides a connector assembly for interconnecting tubular elements. The connector assembly comprises at least one pin member, at least one box member, and for each box member a respective coating layer. Each pin member has a threaded outer surface and each box member has a threaded inner surface allowing the pin member and the box member to be screwed together. Herein the respective coating layer is positioned between the threaded surfaces of the pin member and the box member. Each coating layer is of a softer material than said threaded surfaces. The connector assembly further comprises means for removing excess coating material during make up of the pin member and the box member. | 02-05-2015 |
| 20150061287 | THREADED JOINT FOR PIPES - In the threaded joint for pipes, a coating having a Vickers hardness greater than or equal to 310 is formed on a threaded portion of the box and an inner face of the box corresponding to a seal portion. The seal interference amount ratio δ/D of the seal portion in a pipe circumferential direction is greater than or equal to 0.002, where D is a seal diameter defined as an outside diameter of the pin at a seal point that is a point on the outer peripheral face of the nose of the pin at which the outer peripheral face first comes into contact with the inner peripheral face of the nose of the box and δ is an interference amount defined as an amount by which the outside diameter at the seal point is reduced by the box when the pin and the box are threadedly connected with each other. | 03-05-2015 |
| 20150061288 | CONNECTING OIL COUNTRY TUBULAR GOODS - Ends of separate tubular members used in oil and gas drilling are connected pin-to-pin by a threaded coupling and made leak tight by an internal pressure seal, wherein the male or field end pin of a first tubular member has an integral geometry designed to mate with the female or mill end pin of a second tubular member. The coupling and tubular members possess a modified buttress thread form having a negative load flank angle and a positive stab flank angle. When assembled, the coupling connects the field end pin of the first tubular member with the mill end pin of the second tubular member, wherein integral geometries of the mated pin ends generate the interference necessary to produce a single, metal-to-metal, leak-tight, internal contact pressure seal. An external ball and cylinder contact seal at each end of the coupling provides additional sealing capacity when used in combination with the internal contact pressure seal. | 03-05-2015 |
| 20150069752 | Modular Tubing Seal Bore System - A seal bore is provided in a modular form so that a desired length of continuous seal bore can be provided with modules that are preferably secured to each other with threads. The modular concept allows overall seal bore lengths to go beyond the 20 meter limit that previously existing that could be attained with honing equipment entering opposed ends of a tubular. The modules abut each other as the threaded connection is made up. A transition zone extends in opposed direction on opposed sides of a connection that retracts the contact location between modules far enough so that even if the dimensional tolerances all go to the extreme in the pin and box that make the connection, a surface irregularity will be sufficiently small as to avoid seal stack contact that can result in potential seal damage. The seal stack length spans the transition zone to preserve sealing integrity. | 03-12-2015 |
| 20160160575 | TUBULAR CONNECTION WITH HELICALLY EXTENDING TORQUE SHOULDER - A tubular connection includes a pin member and a box member. The pin member has a first thread structure and a helical torque shoulder spaced axially along the pin member from the first thread structure. The box member has a second thread structure and a second helical torque shoulder spaced axially along the box member from the second thread structure. The first thread structure and the second thread structure are sized and located to control a stab position of the tubular connection, and in the stab position the first helical torque shoulder does not engage or axially overlap with the second helical torque shoulder. A method of joining tubular members utilizing a helical torque shoulder is also provided. | 06-09-2016 |
