168results about How to "Large inner diameter" patented technology

A data carrier and a method of making the data carrier. The data carrier includes a plastic body, at least one metal layer arranged in or on the plastic body for carrying information encoded in one of CD and DVD format, a semiconductor chip arranged in the plastic body, a communication device for connecting the semiconductor chip with an external apparatus, and a mechanism for balancing an unbalance caused by the semiconductor chip. The method includes providing a matrix carrying the encoded information in a relief, the matrix including at least one projection, casting a first part of the plastic body against the matrix, forming the metal layer on a side of the first part of the plastic body disposed adjacent the matrix, forming at least one recess in the plastic body with the projection, and coating the metal layer with a second part of the plastic body, wherein the recess in the plastic body is capable of receiving the semiconductor chip.

Lockable enteral feeding adapters are disclosed. A female adapter has a female tapered cavity having a circular sidewall, a tapered inner surface and an external surface. The female tapered cavity has an external opening at a proximal end thereof that does not form a liquid-tight connection with a standard male Luer conical fitting. One or more threads are disposed on the external surface of the tapered cavity. A male adapter has a male tapered cone is sized to mate with the female tapered cavity. The male tapered cone is too large to form an effective connection with a standard female Luer conical fitting. An internally threaded locking ring is mounted around the male tapered cone. Rotation of the locking ring relative to the one or more threads locks the male adapter to the corresponding female adapter to prevent unintentional disengagement of the male and female adapters.

The present invention provides a valvuloplasty catheter which has a scoring element at its distal part to score stenotic, calcified heart valves in radial direction and to make the single valve flaps/leaflets work again. In addition to this, the device could comprise an attached balloon to post-dilate the valve after the scoring procedure. To reduce a future recalcification, the scoring element and/or the balloon have a pharmacologic coating on their outer surface.

A small-diameter part in the vicinity of a center of a bellows portion in an axial direction has a smaller diameter. A tip end of the small-diameter part contacts at a point A with an outer peripheral face of an interlock pipe. The interlock pipe vibrates with using the point A and points B in both ends as fulcrums. The addition of the point A reduces distance between the fulcrums. In accordance with this reduction, deflection amount of the interlock pipe is reduced and vibration amplitude of the interlock pipe is decreased. Therefore, the interlock pipe does not contact with the bellows portion so that troubles such as noises can be prevented from occurring.

A telecommunication cable is equipped with at least one optical fiber coated by a tight buffer layer made from a polymeric material having an ultimate elongation equal to or lower than 100% and an ultimate tensile strength equal to or lower than 10 MPa. The above combination of features of the polymeric material forming the buffer layer provides an optical fiber which is effectively protected during installation operations and during use, and at the same time can be easily stripped by an installer without using any stripping tools, simply by applying a small pressure with his fingertips and a moderate tearing force along the fiber axis.

The invention discloses a continuous oil pipe sectional sand-blasting perforation casing fracturing pipe column and a casing fracturing method, which are suitable for application in vertical wells and horizontal wells in the petroleum industry, in particular for sectional fracturing of unconventional oil-gas reservoir horizontal wells such as tight sandstone wells. The fracturing pipe column comprises a safety joint, a centralizer, a hydraulic jet tool and a reverse circulation valve, which are connected to a continuous oil pipe in sequence, wherein a mechanical continuous oil pipe fracturing packer is connected below the reverse circulation valve. The sectional casing fracturing method is used for placing the fracturing pipe column provided with the mechanical continuous oil pipe fracturing packer into a casing in a well through the continuous oil pipe; and by the method, a fracturing well section closest to the bottom of the well is fractured at first, and then the fracturing well section is packed by using the mechanical continuous oil pipe fracturing packer. By the continuous oil pipe sectional sand-blasting perforation casing fracturing pipe column and the casing fracturing method, a sand stopper is not needed as an isolation section, so that the sand stopper is not needed to be subjected to back flushing, the production cost is reduced, and multi-layer section fracturing operation for a short horizontal well section or straight well section can be realized.

Described here are devices, systems, and methods for accessing the pericardial space through the pericardium. The access devices may include a plurality of elongate members having lumens that may be advanced together through the body to the pericardium. The elongate members may have different lengths and may be slideably positioned one within the lumen of another. At least one of the elongate members may comprise a distal tip configured to pierce tissue. In some instances, the access devices may also comprise a locking member to constrain the position of one elongate member relative to another.

The differential apparatus comprises (a) a casing rotated by a driving force from outside; (b) a pair of opposing disc plates coaxially disposed in the casing, an opposing surface of each disc plate being formed with a circumferentially continuous groove winding such that a radial position changes at a constant period; (c) a plurality of balls rolling in opposing winding continuous grooves of both disc plates; and (d) a ball holder rotating integrally with the casing and having a plurality of radially extending guide holes, each guide hole movably receiving each ball, wherein the winding continuous groove of each disc plate circumferentially continuously has first guide regions each extending from a radially outer position to a radially inner position of each disc plate and second guide regions each extending from a radially inner position to a radially outer position, inflected regions each connecting each first guide region and each second guide region being larger in width and/or depth than the first guide regions and the second guide regions, whereby a contact stress between the balls and the winding continuous groove is decreased in the inflected regions.

A hydrodynamic bearing device in which an introducing minimum clearance for causing capillary phenomenon is formed from the location in the proximity of the opening of a communicating path to the open end of the bearing hole in between the cover and the end face on the open end of the sleeve so that the operating fluid from the communicating path in the sleeve flows into the bearing hole by the capillary phenomenon; a vent hole leading to the outside air is formed on the cover; a fluid storage space for storing the operating fluid is formed on the inside surface of the cover or the end face on the open end of the sleeve to communicate the introducing minimum clearance and the vent hole in the circumferential direction; and the air bubbles separated at the fluid storage space are exhausted outward from the vent hole.

The present invention provides a collapsible cup holder 10 having a plurality of hinges 12 intercoupling a plurality of rigid panels 14 and a handle 16 to form a collapsible ring 18. When the ring 18 is in an open position, the cup holder 10 can receive and retain a disposable container. When the ring 18 is in a closed position, the size of the holder 10 is reduced. The ring 18 is uniquely collapsible to provide an exposed, rigid panel surface that can be used to prominently display a decorative feature.

A wire collection device for a stent delivery system includes a plurality of nested wire collection drums with a first drum concentric in a second drum. A thumbwheel coupled to the first drum can rotate to actuate rotation of the first drum to collect the retraction wire around the diameter of the first drum. A catching mechanism can rotate about the first drum to engage a catch portion of the second drum and actuate rotation of the second drum to collect the retraction wire around the outer diameter of the second drum. This increases the collection diameter of the retraction wire to provide a mechanical advantage for sheath retraction.

A connector housing of a valve-equipped connector is integrally formed from a tube connection section at a first axial side; a pipe insertion section at a second axial side; and a valve housing section between the tube connection section and the pipe insertion section. The valve housing section is formed with an adequately large inner diameter. A main valve body and a compression coil spring for biasing the main valve body to the first axial side so that it abuts the inner surface of the housing are stored in the valve housing section. A cylindrical bushing is fitted to the first axial side of the pipe insertion section of the connector housing, and a valve cap for receiving a second axial end of the compression coil spring is formed integrally at the first axial end of the cylindrical bushing.

The invention discloses an open hole staged fracturing well completion pipe string provided with a controllable valve and a hydraulic control switching pipe string, which are suitable for well completion processes of horizontal wells and straight wells. The hydraulic control switching pipe string is tripped to open and close the open hole staged fracturing well completion pipe string provided with the controllable valve, so that multilayer-section fracturing well completion construction is realized, and development requirements of low-permeability oil reservoirs and unconventional oil and gas resources are met. The pipe string is sequentially connected with a drill stem running tool, a top suspension packer, a hydraulic control switching retention cylinder, a switchable control valve, an open hole fracturing packer connected with the control valve, a shaft isolating valve and a bottom circulating valve from top to bottom by using a bushing. The hydraulic control switching pipe string comprises a hydraulic control switching tool and a continuous oil pipe; and a set of hydraulic control switching tool is connected to the bottom of the continuous oil pipe. The switchable control valve has the internal drift diameter of the same size; sand fracturing well completion can be performed on a stratum by using the bushing; and thus, requirements of large-displacement and large-scale fracturing reconstruction are met, the crack length, the crack number and the flow guide capacity are increased, and the production capacity and the recovery ratio are effectively increased.

A pressure resistant vibration absorbing hose has a hose body including an inner surface rubber layer, a reinforcing layer and an outer surface rubber layer and a joint fitting including a rigid insert pipe and a socket fitting. The joint fitting is attached to a swaged portion of an axial end portion of the hose body by securely swaging the socket fitting thereto. The inner surface rubber layer is formed by molding such that a swaged portion thereof is larger than a main portion thereof in diameter and a wall thickness of the swaged portion is equal to or larger than a wall thickness of the main portion, and after that, the reinforcing layer and the outer surface rubber layer are laminated to construct the hose body.

The invention discloses a controlled-valve placed well-cementing staged-fracturing well-completion string and a hydraulically-controlled switch string, which are suitable to be applied to a well-completion process for horizontal wells and vertical wells, and through tripping in the hydraulically-controlled switch string to start and close the controlled-valve placed well-cementing staged-fracturing well-completion string, multi-layer-and-section fracturing well-completion construction is realized, thereby meeting the needs of development on low-permeability oil reservoirs and unconventional oil/gas resources. The controlled-valve placed well-cementing staged-fracturing well-completion string, from top to bottom, is sequentially connected with a hydraulically-controlled switch tool detention cylinder, a switchable control valve and hydraulic casing centralizers connected with the two ends of the switchable control valve, a pressed settling valve and a bottom circulating valve by using a casing; and at least a set of switchable control valve and hydraulic casing centralizers connected with the two ends of the switchable control valve are equipped in the string. The hydraulically-controlled switch string comprises hydraulically-controlled switch tools and a continuous oil pipe, and a set of hydraulically-controlled switch tool is connected to the bottom of the continuous oil pipe. The switchable control valves are same in inner drift diameter (same in size), and can carry out well completion on stratums through the sand fracturing of the casing, thereby satisfying the needs of large-displacement and large-scale fracturing reformation.

The invention relates to a bridge plug for fracturing of a casing pipe. The bridge plug comprises a center rod, an upper connector and a lower connector. The upper connector and the lower connector are arranged at the upper end and the lower end of the center rod. The middle of the center rod is sleeved with a long rubber cylinder and short rubber cylinders. The upper portion and the lower portion of the center rod are sleeved with an upper supporting sleeve and a lower supporting sleeve respectively. Rubber cylinder seats are fixed to the upper supporting sleeve and the lower supporting sleeve respectively. The short rubber cylinders at the upper end and the lower end of the long rubber cylinder are installed on the rubber cylinder seats. A seat ring is arranged between the upper supporting sleeve and the upper connector, and the upper end and the lower end of the seat ring abut against the upper connector and the upper supporting sleeve respectively. A slip is arranged between the lower supporting sleeve and the lower connector and is provided with an anchor jaw. According to the bridge plug which is provided with the slip and a locking mechanism and used for fracturing of the casing pipe, the reliability of the bridge plug can be ensured, degradable materials are adopted, and degrading can be conducted as time goes by when certain shaft conditions are reached. The bridge plug for fracturing of the casing pipe has the advantages of being high in pressure bearing capability, free of plug drilling and large in diameter and can be used for transformation of multiple sections of a reservoir of a highly-deviated well and a horizontal well and put into production rapidly.

A flow-through sample container, or flow cell, according to the present invention resides with the channel of magnetic resonance probe without being fixed thereto. The flow cell is removable from the spectrometer while leaving the probe in place, allowing easy cleaning of the probe channel and replacement of the flow cell. An insertion tool that houses the flow cell may be used to safely introduce it to the probe. Input and output capillaries serve as fluid pathways for fluid samples entering and leaving the flow cell, respectively. These capillaries may be connected to the flow cell with a manually operable connector, allowing easy disconnection of the flow cell from the input and output conduit. The capillaries enter through different ends of the spectrometer bore, so that the fluid samples flow enter one end of the spectrometer and exit through the other.

The present disclosure discloses a central shaft for a bridge plug, a bridge plug and a setting method for the bridge plug, and relates to the technical field of bridge plug. The present disclosure addresses the technical problems existing in the prior art that degradable plastics and degradable metal materials are unable to manufacture a bridge plug with a large inner diameter. The central shaft comprises a setting mandrel and a setting tubular shaft, and the setting tubular shaft includes a squeezing shoulder for squeezing a compression ring or a reducing support ring of the bridge plug, and a support trunk; after the setting mandrel is disconnected from the downstream-end support, the setting mandrel can be withdrawn from the central hole of the setting tubular shaft so that the central hole of the setting tubular shaft forms an internal fluid channel of the bridge plug; and the strength of the material of the setting mandrel is higher than the strength of a degradable material or corrodible material, and the material of the setting tubular shaft is a degradable material or a corrodible material. The bridge plug comprises the central shaft provided in the present invention. The present disclosure is used to enlarge the inner diameter of the bridge plug, and improve the plugging effect, anchoring performance and construction convenience of the bridge plug.