8708 results about "Safety valve" patented technology

Secondary resonant pickup coils (102) used in loosely coupled inductive power transfer systems, with resonating capacitors (902) have high Q and could support large circulating currents which may destroy components. A current limit or "safety valve" uses an inductor designed to enter saturation at predetermined resonating currents somewhat above normal working levels. Saturation is immediate and passive. The constant-current characteristic of a loosely coupled, controlled pickup means that if the saturable section is shared by coupling flux and by leakage flux, then on saturation the current source is terminated in the saturated inductor, and little detuning from resonance occurs. Alternatively an external saturable inductor (1101, 1102) may be introduced within the resonant circuit (102 and 902), to detune the circuit away from the system frequency. Alternatively DC current may be passed through a winding to increase saturation of a saturable part of a core. As a result, a fail-safe pickup offering a voltage-limited constant-current output is provided.

The present invention provides a bi-directional ball seat and method of use. In at least one embodiment, the present invention provides a fluid control system that includes a radial protrusion that can be selectively engaged and disengaged upstream and/or from a ball seat. For example, a ball can be placed in a passageway, engaged with a downstream ball seat, and the radial protrusion radially extended into the passageway distally from the seat relative to the ball. A reverse movement of the ball is restricted by the active radial movement of the radial protrusion into the passageway. The control system can be used to control a variety of tools associated with the well. Without limitation, the tools can include crossover tools, sleeves, packers, safety valves, separators, gravel packers, perforating guns, decoupling tools, valves, and other tools know to those with ordinary skills in the art.

A system and method for providing a safety alert for a device is disclosed. The invention minimizes or prevents the affects of programming errors and/or provides enhanced alert information to a monitoring healthcare provider, wherein the alert information may relate to a potential safety concern. The method includes monitoring data transmitted from a device (e.g., infusion pump) and comparing the data to pre-established rules. When the data violates the rules, the system compiles an alert information packet, wherein the alert information packet includes information related to the device and the data. The system then transmits the alert information packet and/or an enhanced alert to multiple computer screens in a particular area.

Methods and devices for utilizing an electrically-actuated wireline insert safety valve (WLSV) and for delivering power to an electrically actuated WLSV via inductive charging and without the use of wired contact.

A shaped charge includes a charge case; a liner; an explosive retained between the charge case and the liner; and a primer core disposed in a hole in the charge case and in contact with the explosive, wherein at least one of the case, the liner, the primer core, and the explosive comprising a material soluble in a selected fluid. A perforation system includes a perforation gun, comprising a gun housing that includes a safety valve or a firing valve, wherein the safety valve or the firing valve comprises a material soluble in a selected fluid.

A pressure fryer is provided including a cooking container having a pressure vent which is connected to a high pressure cylinder filled with carbon dioxide. An electromagnetic valve and a check valve are provided on the connecting tube between the pressure vent and the high pressure cylinder. A lid includes a safety valve and a pressure sensor. A controller opens and closes the safety valve and the pressure for the electromagnetic valve for supplying carbon dioxide into the cooking container based on the pressure therein which is obtained from the pressure sensor, such that the pressure in the cooking container can be maintained within a predetermined value.

A pouch type secondary battery has a safety vent which prevents explosion and fire by removing a sealing mechanism of a pouch casing when the internal temperature increases due to overcharging, overdischarging or over-heating, and which exhausts internal gas before explosion and fire of the battery when the internal gas pressure excessively increases due to overcharging, overdischarging or internal short-circuit. The pouch type secondary battery includes an electrode assembly having positive and negative electrode plates with a separator interposed therebetween, and positive and negative electrode terminals extending from the positive and negative electrode plates, respectively, a pouch casing having a space in which the electrode assembly is housed to be sealed, a seal portion provided at the periphery of the space, and at least one of the positive and negative electrode terminals exposed to the seal portion, and at least one opening member disposed at the seal portion and made of a resin material having a lower melting point than a melting point of the seal portion of the pouch casing.

A safety valve control system may include a remotely operable control assembly; a first transducer, a valve assembly, and a pump assembly in communication with the control assembly; and a fluid reservoir in communication with the valve and pump assemblies and a safety valve. The control assembly is operable to actuate the pump and valve assemblies to supply and return fluid from the fluid reservoir to actuate the safety valve into open and closed positions, in response to one or more signals received from the first transducer. A method of operation may include maintaining the safety valve in an open position while sensing a physical property with the control system; communicating a signal corresponding to the sensed physical property to the control system; and automatically closing the safety valve in response to a comparison of the sensed physical property to a pre-set condition.

Disclosed is a cage for breeding laboratory animals. The laboratory animal breeding cage can detachably couple a lid to a body of the cage in a simple manner. Further, by virtue of a double filter mounted in the lid, the laboratory animals can be bred under both positive and negative pressure. Furthermore, by virtue of a double safety valve, the inside and the outside of the cage can be doubly air-blocked. The cage can be conveniently washed an managed, the cause of failure is eliminated and a life span of the cage is lengthened, and the efficiency in breeding and controlling the laboratory animals are enhanced.

An air compressor includes a cylinder housing having a passage formed in one end, a piston slidably received in the cylinder housing and moved relative to the cylinder housing in a reciprocating action to generate a pressurized air out through the passage of the cylinder housing. The cylinder housing includes an outlet tube having a bore communicating with the passage and the chamber of the cylinder housing, and having two or more ducts for readily coupling to and for supplying the pressurized air to the nozzle, the pressure gauge, the safety valve, or the other devices.

The invention discloses a low-pressure pot cover which comprises a cover body and a cover bead, wherein an air outlet valve assembly and a safety valve assembly are further arranged on the cover body, and are respectively located on the left and right sides of the cover bead on the cover body; the cover body comprises an upper cover plate, a lower cover plate and locking racks for locking the pot cover on a pot body; the locking racks are located between the upper cover plate and the lower cover plate and can slide left and right; the cover bead is mounted at the middle part of the upper cover plate; the cover bead comprises a lower cover bead body, an upper cover bead body, a cover bead gear and a cover bead rack; the right end of the transverse part of the left locking rack and the left end of the transverse part of the right locking rack are respectively connected with the bottom of the upper cover plate through reset springs; and the rack part of the right locking rack and the rack part of the left locking rack are respectively located on the front and rear sides of the cover bead gear and are meshed with the lower part of the cover bead gear. The invention provides the low-pressure pot cover which is convenient to use, high in air discharging speed and safe.

A system for capturing displaced fluid or pumping fluid through tubulars being run into or out of the wellbore is described. Embodiments are supported by a traveling block and top drive unit with telescoping features to rapidly seal over a tubular to connect the tubular to a mud system. Alternative sealing arrangements for sealing inside the tubular connection are also disclosed. These alternate sealing arrangements also provide flow areas larger than the tubular body since no portion of these arrangements enter the tubular body. All of the sealing arrangements provide a biased area whereby any internal pressure in the invention forces the seals into more intimate contact with their mating seal surfaces. A mudsaver valve having a large flow capacity is described to keep fluid from spilling when the apparatus is removed from the tubular. This mudsaver valve also provides for pumping of fluid into the tubular or flow of fluid from the tubular to the mud system prior to removing the apparatus from the tubular. In these embodiments, the apparatus can be placed in threaded sealing contact with the tubular and can incorporate a safety valve that can be manually closed in the event of a well kick. In another embodiment, a singular control input accomplishes operation of the apparatus to extend or retract the telescoping feature. Also illustrated is a drain valve that provides a method of completely removing all fluid pressure from within the apparatus prior to removing the apparatus from the tubular. The drain system also provides a means of disposing of the excess fluid away from the rig floor where spillage is a danger to the personnel or environment. The drain system can also be connected to a scavenger system that is intended as a vacuum system for removal of spillage. Connection to this system eliminates all possible spillage and completely removes fluids from the tubular handling area.

A subsurface safety valve comprises a tubular body adapted for placement within a wellbore and defining a fluid passageway. A valve closure member, such as a flapper valve, is carried by the tubular body and movable through a closure path between positions opening and closing the fluid passageway. An actuator, such as a biasing spring, urges the valve closure member to its closing position. A flow tube is axially-movable within the tubular body between a first position preventing the actuator from urging the valve closure member to its closing position and a second position permitting the actuator to urge the valve closure member to its closing position. A latch assembly is provided for preventing movement of the valve closure member from its opening position to its closing position until the flow tube has been urged clear of the closure path. Aspects of the safety valve are employed by a related method and system.

An apparatus and method for use in a cased well having a production tubing assembly installed in the well and terminating with a connection means at a subterranean location. The apparatus and method utilizes a spoolable tubular assembly for installation extending into the well to the connection means wherein the tubular assembly has a plurality of conductors formed connected to electrically operable valve, sensors and tubing latch in the tubular assembly. In the method the assembly is spooled into the well with the tubing latch being operated from outside the well through the tubing conductors to selectively connect and disconnect the assembly from the connector means. Operating the salve and sensors from outside the well when the assembly is installed. The assembly tubing is preferably made of a non-conductive, and preferably composite material that enclosed at least one, and preferably a plurality of electrical conductors.