280 results about "Rupture disc" patented technology

An endovascular graft which is configured to conform to the morphology of the vessel to be treated and which is made from an inflatable structure having a proximal end with a proximal inflatable cuff and a distal end with a distal inflatable cuff. At least one elongated inflatable channel is disposed between and in fluid communication with fluid tight chambers of the inflatable cuffs which may contain rupture discs therebetween which can be configured to rupture at different pressures. A thin flexible barrier disposed between the inflatable cuffs and the elongated inflatable channel of the frame so as to form a tubular structure defining a longitudinal channel to confine a flow of blood or other fluid therethrough. The graft may also have an expansion member attached to the proximal end of the graft which is preferably made of linked expandable rings of pseudoelastic shape memory alloy which is self expanding and prevents axial displacement of the graft once it is deployed.

A casing hanger support assembly supports an inner casing string within a well containing an outer casing string and a production tubing string. The casing hanger support housing supports the casing hanger in the well, with a casing hanger being secured to an upper end of the inner casing string. One or more of a rupture disk and a blowout plug are provided in a wall of the casing hanger support housing for maintaining the desired pressure differential between an annulus within the outer casing string and an annulus exterior of the outer casing string, thereby preventing casing collapse or burst.

A rupture disc for use in a pressure relief system includes a dome having a concave and a convex side and a circumferential flange associated therewith. At least one control score is formed or otherwise produced in the dome at a radial position between an apex of the dome and an outer circumference of the dome. At least one of a depth, a width, a length and the radial portion of the at least one control score is selectively controlled so that the depth, width, length, and/or radial position of the at least one control score controls the pressure at which the dome will start to collapse.

A reverse acting rupture disc is provided having a laser defined electropolished line-of-weakness recess, and an improved method of forming an electropolished line-of-weakness recess in a reverse acting rupture disc that assures full opening of the disc upon reversal. A rupture disc blank is pre-bulged, final bulged, and then provided with a layer of resist material. A laser is used to remove at least a portion of the layer of resist material corresponding to a desired line-of-weakness recess in the concave face of the bulged rupture disc. The disc is then subjected to an electropolishing operation to remove metal from the lased area of the rupture disc, thereby forming a lustrous polished line-of-weakness recess in the disc of desired configuration and of a predetermined depth that is related to material thickness. The electropolished line of weakness is defined by spaced opposed channel portions separated by a central raised crown portion wherein the channel portions are of greater depth than the crown portion. The burst/reversal pressure of the disc having an electropolished line-of-weakness recess may be selectively controlled by varying the pre-bulging pressure on the disc.

A method of forming a score line in a rupture disc using a laser is provided, wherein the method includes selecting a wavelength for the laser that maximizes absorption of the laser radiation by the disc material, selecting a pulse duration for the laser that maximizes a peak power of the laser, selecting a pulse repetition rate for the laser that reduces a heat affected zone of the rupture disc during ablation, and selecting the speed of relative motion between the laser and the rupture disc. The score line is ablated in the rupture disc using the laser to remove material from the rupture disc as vapor without melting or oxidizing disc material adjacent the material being removed.

A tool is provided that allows in a single trip advancing the liner while more hole is made until the liner is properly positioned. Slips are actuated into the inside of the liner to grasp it as a swage is released to move to support the liner to the surrounding tubular. With the liner supported in the hole, the running tool can be picked up to test the release feature and then set down again for cementing. The tool is then picked up higher to release a flapper and re-pressurized to set a seal adjacent the support previously engaged by swage operation. The flapper has a rupture disc blown and the tool is removed. An emergency release is provided.

A tubing pressure operated sliding sleeve is used in cementing a tubular string. The sleeve is configured to hold closed as pressure builds to a predetermined value. When pressure is further raised a rupture disc blows and provides access to an integral piston disposed outside the sleeve. The back side of the piston is exposed to a low pressure or atmospheric chamber located between upper and lower seals. The sleeve thickness near the chamber can be made relatively thick to avoid flexing or bending under differential pressure because the net force to shift the sleeve is from differential pressure on the piston rather than the piston areas created by the upper and lower seals.

A pressure relief device and a hydraulic fracturing system having a pressure relief device are provided. In one form, the pressure relief device has a valve body with a linearly extending throughbore between the inlet and outlet thereof. A rupture disc is secured in the valve body so that a frangible dome wall portion thereof has a reverse-acting orientation in the valve body bore. The hydraulic fracturing system includes a pump and a delivery line that receives pressurized fracturing fluid from the pump and delivers it to a well. A pressure relief device is installed along the delivery line. A sensor detects fluid flow downstream of the pressure relief device which allows the pump to be shut down when the downstream fluid flow is detected. The pressure relief device can have a body with a domed rupture disc and the sensor therein.

A reverse acting rupture disc and methods of forming the same are provided. Generally, the rupture disc comprises a bulged portion and a circumscribing flange area surrounding the bulged portion. The bulged portion includes a mechanically formed line-of-opening recess comprising a singular channel. In certain embodiments, the mechanical process by which the recess is formed utilizes a high-speed mill which removes a portion of metal from the bulged portion of the disc without disrupting the substantially uniform metallic grain structure of the metal adjacent the channel.

A non-fragmenting pressure relief apparatus includes a rupture disc having a central bulged or flat section and a peripheral flange portion. Certain embodiments of the invention have a butterfly shaped element having two wing panels attached to the underside of a rupture disc of the apparatus. A line of weakness of major length extends around the periphery of the central section of a disc and C-shaped end region lines of weakness in the wing panels, which define a hinge portion of the disc therebetween, first converge and then diverge from one another, and connect with the major line of weakness. Application of an overpressure to the rupture disc apparatus causes the entire line of weakness to sever including the end region lines of weakness whereby divergence of the opening force at the hinge portion of the disc prevents separation of the central section of the disc from the peripheral portion of the disc. In another embodiment, the butterfly shaped element is omitted and the C-shaped end region lines of weakness are provided in the central section of the disc.

In one embodiment, the invention provides a rupture disk assembly having a rupture disk and a rupture disk holder. The rupture disk holder has a first annular member downstream of the rupture disk, a second annular member upstream of the rupture disk, and an optional third annular member upstream of the second annular member. An outer peripheral portion of the rupture disk is sandwiched between the first and second annular members; and, if a third annular member is present, (a) the second annular member is sandwiched between the outer peripheral portion of the rupture disk and the third annular member, and (b) the third annular member includes a fluid port aimed at the rupture disk. However, if the third annular member is not present, the second annular member includes a fluid port aimed at the rupture disk. In another embodiment, the invention provides an equipment access assembly having an equipment access cover, an equipment access cover mount, and an annular member between the equipment access cover and cover mount. The annular member includes a fluid port aimed at the equipment access cover. In yet another embodiment, the invention provides a valve mounting assembly having a downstream valve mount, an upstream valve mount, a valve intermediate the downstream and upstream valve mounts, and an annular member intermediate the valve and the upstream valve mount. The annular member includes a fluid port aimed at the valve.

A modular current interrupt device includes an electrically-conductive rupture disc, an electrically-conductive pressure disc attached to the rupture disc to form an electrical pathway. An electrically-insulating ring partitions a perimeter of the rupture disc from a perimeter of the pressure disc, and a seating element secures the electrically-insulated ring to the pressure disc. At least one of the rupture disc and electrically-insulating ring defines a conduit, whereby exposure of one side of the pressure disc to sufficient force through the conduit causes the pressure disc to separate from the rupture disc to thereby sever the electrical pathway. A low pressure current interrupt device (CID) activates at a minimal threshold internal gauge pressure in a range of, for example, between about 4 kg/cm² and about 9 kg/cm². Preferably, the CID includes a pressure disc that includes a frustum having a first end and a second end, a base extending radially from a perimeter of the first end of the frustum, and an essentially planar cap sealing the second end of the frustum. The first end has a broader diameter than the second end, with a cross-section of at least one of the first and second end being non-circular.

A reverse-acting rupture disc (10) having a laser-defined reversal initiation feature (16) is provided in the bulged section (12) of the disc. The reversal initiation feature comprises at least a first lased area (22) that has a reduced thickness relative to rest of the bulged section. A second lased area (24) may also be provided within the margins of the first lased area. The second lased area has a depth that is greater than the depth of the first lased area. A line of weakness (40) may be formed in the bulged section that functions to direct reversal of the bulged section toward a particular area of the disc, such as line-of-opening recess (56).

A rupture disc (10) is provided comprising a line of opening (16) formed in at least one face thereof. The line of opening (16) is formed by laser machining of the disc's face and includes at least one disc opening control feature (20). The disc opening control feature (20) may be an opening-initiation feature configured to assist with initial rupture of the disc (10). Alternatively, the opening control feature (20) may be an anti-fragmentation feature configured to dissipate the energy acting upon the disc (10) so as to prevent separation of the petal formed upon opening of the disc.

A method for production of safety/rupture discs comprises the steps providing a foil element, selecting a wavelength for a laser beam of a pulse laser within a range of between 800 nanometers and 1800 nanometers, selecting a pulse repetition rate for the laser beam within a range of between 15 KHz and 800 KHz, selecting a pulse duration for the laser beam less than 10 nanosecond and ablating at least one non-through cut in the foil element by directly applying said laser beam to the foil element to remove material from the foil element thereby obtaining a safety/rupture disc.