Nippon Steel Corporation

Vallourec Oil and Gas France

Hitachi-kokusai Electric Inc.

Satoshi Maruta

Yousuke Oku

Michihiko Iwamoto

Alan Fothergill

Tadashi Nakamura

Yusuke Takeda

Masaaki Sugino

Seiichi Hirai

Pierre Bernard Martin

Shinya Ogura

Daly Daly

Ryosuke Kimura

Yasuhiro Kochi

Yusuke Toyota

Benoit Briane

Yoshihiro Kawashima

Corey Dufrene

Yosuke Oku

Sho Nishino

Pierre Martin

In a threaded connection for pipe having a two-step thread construction with intermediate shoulder surfaces, compression resistance is further improved. Upon completion of make-up of the pinand box, the diameter of a stabbing clearance is 0.15 mm or smaller, where the stabbing clearance is defined between the stab flank of a male thread including an inner thread portionand an outer thread portionand the stab flank of a female thread including an inner thread portionand an outer thread portion, thereby causing the stab flanks of the male and female threads to start to be in contact before the angle of rotation θ of the intermediate shoulder surfacesandas appearing in a longitudinal cross section starts to rapidly increase, thus preventing accumulation of damage in the intermediate shoulder surfacesand

Threaded connection for pipe

A threaded connection for pipe in which the axial distance between the box intermediate shoulder surface and the box end shoulder surface of the box before make-up, L, is larger than the axial distance between the pin intermediate shoulder surface and the pin end shoulder surface of the pin before make-up, L, such that, upon completion of make-up, the pin and box intermediate shoulder surfaces and are in contact and function as torque shoulders, while the pin and box end shoulder surfaces are in light (or no) contact. The difference between the axial distances, (L−L), is such that, when the pin and box are made up and upon application of an axial compressive load, the pin and box are slightly axially compressed by the compressive load and the pin end shoulder surface comes into pressure contact with the box end shoulder surface to bear part of the compressive load.

In a threaded connection for pipe with a two-step thread construction, including intermediate shoulders, during stabbing, the internal-pressure sealing surface of the pin near its tip is prevented from contacting the intermediate shoulder of the box and thus receiving damage. L, L, hand hshown in FIG.satisfy Expressions (1) and (2), provided below. θis the angle of slope of the straight line connecting the two ends, as determined along the axial direction, of the internal-pressure sealing surface of the pin. Expression (3), provided below, is also satisfied.  (1)()×tan θ  (2)  (3)

A threaded tubular connection comprises a first tubular () component and a second tubular component (). The first tubular component () includes a female portion () defined on an interior surface of the first tubular component. The female portion includes an inner threaded portion () and an outer threaded portion () which are offset radially with respect to a longitudinal axis of the first tubular component by a first shoulder (). The second tubular component () includes a male portion () defined on an exterior surface of the second tubular component. The male portion is to be inserted into the female portion, and includes an inner threaded portion () and an outer threaded portion () which are offset radially with respect to a longitudinal axis of the second tubular component by a second shoulder (). The second shoulder is to abut the first shoulder once the male portion is connected to the female portion. The threaded tubular connection comprises an inner short length fluid tight seal.

Threaded connection including and intermediate shoulder

In a threaded connection of a two-step thread construction including intermediate shoulder surfaces, a break is prevented near the intermediate critical cross sections upon application of a tensile load, and the intermediate shoulder surfaces are easier to create, thus improving productivity. The outer periphery portion of a pin located between an intermediate shoulder surface of the pin and a second male thread is provided with a circumferential groove including a curved surface smoothly contiguous to the intermediate shoulder surface, thereby mitigating plastic strains generated near the pin intermediate critical cross section PICCS. The inner periphery portion of a box located between an intermediate shoulder surface of the box and a first female thread is provided with a circumferential groove including a curved surface smoothly contiguous to the intermediate shoulder surface, thereby mitigating plastic strains generated near a box intermediate critical cross section BICCS.

Threaded connection

A threaded tubular connection includes a tubular female end extending from a main body of a first tubular member, and a tubular male end extending from a main body of a second tubular member, such that the tubular male end includes a first machined inner surface close to the male free end and a second machined inner cylindrical surface above a threaded portion of the male end such that a second inner diameter of the second machined inner cylindrical surface is smaller than a first inner diameter of the first machined inner surface.

Tubular threaded connection

A threaded connection includes a pin and a box. The pin includes, in the order from a free end side of the pin toward a tubular body side thereof, an inner sealing surface, an inner male threaded portion, a shoulder portion, an outer male threaded portion, and an outer sealing surface. The box includes, in the order from a tubular body side of the box toward a free end side thereof, an inner sealing surface, an inner female threaded portion, a shoulder portion, an outer female threaded portion, and an outer sealing surface. Between the inner sealing surface and the inner female threaded portion of the box, an inner groove along a circumferential direction is provided, and some threads of the inner male threaded portion of the pin are contained in the inner groove.

Threaded connection for steel pipes

A threaded connection connecting a pair of pipes includes a pin and a box. The pin has a male thread on its outer diameter. The box has a female thread on its inner diameter, the female thread corresponding to the male thread. The male thread includes constant-thread-width and varying-thread-width portions. The constant-thread-width portion has a constant thread-groove width. The varying-thread-width portion has a thread-groove width equal to or larger than the groove width of the constant-thread-width portion and gradually increasing, from the constant-thread-width portion toward the tip of the pin. The female thread includes constant-thread-width and varying-thread-width portions. The constant-thread-width portion has a constant thread-ridge width. The varying-thread-width portion has a thread-ridge width equal to or larger than the thread-ridge width of the constant-thread-width portion and gradually increasing from the constant-thread-width portion toward the center of the box.

A threaded connection includes a pin including a wedge male thread having a varying-thread-width portion and a box including a wedge female thread having a varying-thread-width portion. The threaded connection is constructed such that, when both stab flanks and load flanks of the male thread of the pin contact the box, the shoulder on the pin is not in contact with the shoulder on the pin, and, with a further rotation in the make-up direction, the shoulder on the pin is capable of contacting the shoulder on the pin before the threads (i.e. male and female threads) yield.

A threaded connection for steel pipe is provided that prevents cross-threading and provides good compression load resistance. A threaded connection () includes a pin () and a box (). The male thread stabbing flank () of the pin () includes two male thread stabbing flank portions () and (). The male thread stabbing flank portion () is located farther from the pipe axis (X) of the steel pipe () and has a stabbing flank angle (&#x3b1;1) of &#x2212;10 to 15 degrees. The male thread stabbing flank portion () is located closer to the pipe axis (X) and has a stabbing flank angle (&#x3b1;2) of 20 to 60 degrees. The female thread stabbing flank () of the box () includes two female thread stabbing flank portions () and (). The female thread stabbing flank portion () is located farther from the pipe axis (X) and has a stabbing flank angle (&#x3b1;1) equal to the stabbing flank angle (&#x3b1;1) of the male thread stabbing flank portion (). The female thread stabbing flank portion () is located closer to the pipe axis (X) and has a stabbing flank angle (&#x3b1;2) equal to the stabbing flank angle (&#x3b1;2) of the male thread stabbing flank portion ().

Threaded connection for steel pipe

A threaded connection that provides high sealing performance is provided. A threaded connection () includes a pin () and a box (). An inner male thread () of the pin () includes a parallel portion (). The parallel portion () is located at an end portion of the inner male thread () adjacent to the pin inner sealing surface (), and has thread roots parallel to the pipe axis. An inner female thread () of the box () includes a tapered portion (). The thread height in the tapered portion () is larger than that in the parallel portion (). Da&#x3c;Db is satisfied, where Da is the difference in diameter between adjacent thread crests () in the tapered portion () in a longitudinal cross section of the pin () and box () as found when the connection is not made up, and Db is the difference between the diameter of the thread root () in the parallel portion () and the maximum diameter of the pin inner sealing surface ().

An image processing device or a method of processing an image is disclosed. The method includes receiving an image, detecting a plurality of person images in the image, identifying at least a first person image from among the plurality of person images by a preferential method, identifying at least a second person image from among the plurality of person images excluding the first person image, by an exhaustive method, and extracting a first feature amount as to the first person image and a second feature amount as to the second person image during a time interval. For example, the total number of the first person images and the second person images is no more than a maximum number of person images, identified by performance corresponding to process the person images during the time interval.

Image processing device and image processing system

The vehicle monitoring system includes a plurality of cameras provided corresponding to a plurality of doors provided on both sides (A side and B side) of each vehicle, and a management device for determining a camera corresponding to an open door. The management device determines a camera whose initial position is on the B side as the display use camera to be used for display, with respect to a vehicle in which the initial position of the door open camera corresponding to the open door identified by the open door identification information, and the door opening-side information match with the B side. With respect to a vehicle in which the initial position of the door open camera and the door opening-side information do not match with the B side, the management device determines a camera whose initial position is on the A side as the display use camera.

Vehicle monitoring system, management device and monitoring method

A technique useful for searching which part of a predetermined area a person who has not yet reached a target position in the predetermined area until a scheduled time, is located. A boarding passenger management device and a boarding passenger reception terminal obtain a boarding passenger management number of the person who enters a boarding lobby, a monitoring camera captures an image of the person, monitoring cameras installed in association with multiple division areas capture an image of each of the division areas. The boarding passenger management device identifies the person who has not yet reached the boarding gate even though it is after the scheduled time, and the boarding passenger management device and the face feature quantity search device identify a division area where an image of the person considered to be a not-yet arrived target person is captured.

Video monitoring system, video monitoring method, and video monitoring device

When an internal terminal (TMto TMn) replaced with another terminal due to the breakdown or the model upgrading and the DHCP function allocates a new private address for the MAC address of the terminal after replacement, the newly allocated private address is managed in association with physical ports (PPto PPn) in an expansion NAPT table. Then, in this state, when an IP packet is delivered from an external terminal (TM) on the side of a WAN(), the transmission destination address of this IP packet is converted to the private address of the internal terminal after conversion in accordance with the expansion NAPT table using the physical ports as a key.

Growing community of inventors

Tokyo, Japan

Satoshi Maruta