1071 results about "Shear pin" patented technology

A mechanically energized annular packoff seal cartridge for metal-to-metal sealing with substantially concentrically arranged tubular members, such as the tubular wellhead housing and well casing of an oil and gas well. A tubular pressure responsive energizing mandrel having downwardly converging frusto-conical seal actuating surfaces is of a dimension for entry into the annulus between the wellhead seal bore and the rough outer surface of the well casing. Elastomer seals are carried by the energizing mandrel and establish sealing of the energizing mandrel with the wellhead housing and well casing A pair of soft metal seal rings are carried by the seal cartridge and are forced radially into metal-to-metal sealing with the wellhead housing and the rough outer surface of the well casing respectively by the double tapered seal actuating surfaces responsive to pressure induced downward force on the energizing mandrel. A locking mandrel and the seal actuating mechanism are restrained against actuating movement during running of the seal cartridge by a running tool by shear pins, thus enabling the cartridge to pass through various well equipment. The shear pin of the locking mandrel is sheared by downward force applied by the running tool to lock the seal cartridge within the wellhead housing. The shear pin of the seal actuating mechanism is sheared, after locking of the cartridge to the wellhead housing, by the force of pressure introduced into the wellhead above the seal cartridge which acts to develop a pressure differential across the elastomer seals of the cartridge.

Supports such as a pallet carrying aircraft passenger seats or a bottom of a freight container are secured to a floor structure in an aircraft. For this purpose the floor structure includes floor stringers (5) supported on and secured to floor joists (11). The stringers (5) are U-rails having an upwardly open U-cross-section with a first interlocking member (8) in the U-cross-section. An adapter (4, 13) having a present existing stud (8) and shear pin system (8A) is secured in the U-rail of the stringers (5). The adapter (4) is secured to or securable to the support by a latching (2, 3). Another adapter (13) carries rotatable rollers or roller balls that project slightly above an upwardly facing floor level to permit, for example, freight containers or seat pallets to roll along the floor. Instead of adapter (13) it is also possible to install a present existing container latch carrier (14) in the present stringer (5).

A float shoe/collar apparatus and method is disclosed for multi-purpose use in running a tubular string such as a casing string or liner into a wellbore and for optimizing cementing operations. In one presently preferred embodiment, the present invention permits auto filling of the tubular string as the string is lowered into the wellbore. If desired, circulation can be effected through down jets for washing the wellbore as necessary. After the tubular string is positioned, the down jets can be blocked off and up jets opened to thereby direct cement upwardly to optimize cement placement. Check valves can also be activated in accord with the present invention to prevent flow from the wellbore into the tubular string. In one embodiment, the invention comprises an inner member and tubular member. The inner member is movable upon release of shear pins to cause longitudinal movement relative to the outer member. The movement of the inner member may close a plurality of downward jets and may also open a plurality of upward jets, if desired. The apparatus may also be equipped with a set of check valves which can be held open on run in, and subsequently activated to thereby automatically close upon cementing to prevent "u-tubing" of fluid back into the casing. In another embodiment a float collar comprises the same valve/valves as the float shoe, without jets. This float collar may be run in conjunction with a guide shoe, with or without jets.

A medical knife assembly includes an outer clamp assembly and an inner clamp blade assembly having a cutting blade assembly. The inner and outer clamp assemblies are pivotally connected at about their proximate ends so they may be squeezed together with one hand to affect a novel method of clamping and cutting in a single motion operation. A set of shear pins holds the component parts of the inner and outer assemblies together in a ready position that enables a user to properly position the knife assembly for severing an umbilical cord at the time of birth. Once the umbilical cord is severed, the component parts of the inner and outer assemblies separate providing independent clamps, one staying with an infant segment of the umbilical cord and one staying with a maternal segment of the umbilical cord. The two independent clamps operate to clamp the umbilical cord on both sides of the cutting blade assembly thereby preventing or at least greatly

A downhole bypass valve utilizes a stationary sleeve defining an interior ball-seat. When a dropped ball is seated, fluid differential pressure is diverted to an annular area adjacent a first sliding sleeve. The sleeve slides in response to the pressure differential upon shearing of a shear pin, or similar, and opens ports to the wellbore annulus. Treatment or maintenance operations can then occur through the ports, which can be fitted with nozzles. A second sliding sleeve, independent from the first, is operated in response to dropping a second ball into the device. The second ball diverts fluid differential pressure to an annular area adjacent the second sleeve and movement occurs when a shear pin shears. The second sleeve covers the ports to the wellbore annulus and closes the valve. After a sliding sleeve shifts, pressure across the sleeve is equalized, allowing reverse flow without risk of accidental sleeve actuation.

A vehicle apparatus comprises a slider body having a substantially vertical slide slot and a substantially horizontal shear pin. The slider body further includes a headlamp mounting section and a hood bump-stop mounting section. An adjustable bumper is received by the hood bump-stop mounting section with an adjustable height. A reinforcement member is configured to be fixed with respect to a grille opening of the vehicle. The reinforcement member has a bore aligned with the slide slot for receiving a fastening pin and an aperture receiving the shear pin. A force greater than a predetermined force applied to the adjustable bumper results in the shear pin breaking off in the bore and the fastening pin sliding along the slide slot as the slider body moves downward.

A computer implemented method and apparatus for creating a structural joint for an aircraft. A first composite component and a second composite component are co-joined to form the structural joint for the aircraft. A hole through the first composite component and the second composite component is created. A composite shear pin is placed through the hole. A composite collar is bonded to the composite shear pin with an adhesive.

A deformable release device is disclosed to be used with downhole setting tools. The deformable release device may provide a releasable detachment to any customary setting tool, such as electric line, hydraulic, hydrostatic, and mechanical setting tools, used to set a downhole packer-type device. The deformable release device allows for the automatic release of downhole setting tools at the application a predetermined force, similar to a shear pin or shear stud. However, since the deformable release device deforms rather than shears or breaks, the releasing device minimizes the debris or remnants of the device left in the wellbore.

This invention relates to a shear dowel assembly for distributing loads between adjacent concrete slabs, separated by a joint. The shear dowel assembly includes a dowel sheath having a front face and a rear face. The rear face of the dowel sheath is imbedded within the first concrete slab, whereas the front face is left substantially flush with the side of said first concrete slab. The front face also has a portion defining an opening therein. There is also provided a shear dowel adapted to be inserted into the opening in the dowel sheath, with a first end of the shear dowel abutting the rear face of the dowel sheath, and a second end of the shear dowel extending out from the opening in the dowel sheath, whereby the shear dowel may be embedded within a second adjacent concrete slab to be poured. The shear dowel has a width of constant cross section, and is preferably trapezoidal (or in the shape of a trapezium) in plan view. The shear dowel assembly allows for increased differential movement of the adjacent concrete slabs, as the joint gap between the concrete slabs increases, whilst retaining the load carrying capacity of the shear dowel at all times.

An indicator assembly for an aircraft landing gear for providing indication of a hard landing. The indicator assembly including a actuator member movable when the pressure on a shock strut of the aircraft landing gear exceeds a desired load and stroke threshold indicative of a hard landing. A shear pin is coupled to the actuator member which is configured to shear when a desired level of force is applied to at least a portion of the shear pin. A visibly recognizable indictor is moved from a non-indicating position to an indicating position upon shearing of the shear pin.

The present invention is a pivoting crash barrier for arresting an impacting vehicle without causing excessive injury to the driver. The crash barrier has an easily replaceable expendable gate which houses multiple plastically deformable cables mounted within for absorbing the energy of the impacting vehicle. The crash barrier design causes the cables to deform as an unit, rather than separately. The crash barrier gate is pivotally supported on a horizontal shaft by an operator unit positioned on a first side of a roadway. An engagement stanchion engageable by the outer tip of the lowered gate supports the lowered gate on the second, opposed side of the roadway. The upper sections of both crash barrier stanchions consist of operator heads that can pivot about the vertical axes of their respective mounting posts after the shearing of restraining shear pins whenever a vehicle impact occurs. This swiveling reduces the tendency for the components of the crash barrier other than the gate to sustain significant damage during vehicle impacts. The crash barrier gate further has a latch on the engagement stanchion side that prevents inadvertent gate unlatching from uplift forces to the gate and a simplified method of balancing the crash barrier with counterweights.

The invention relates to a mechanical underground all-in-one blowout preventer, which belongs to the well control equipment. The blowout preventer mainly comprises two parts, an arrow-type check valve and an outer annular packer, wherein the arrow-type check valve adopts the principle of one-way conduction of a valve core to realize annular blowout prevention in a drill stem, and the outer annular packer mainly comprises a plastic cylinder, a set shear pin, an unset shear pin, a locking component and the like. When the set shear pin is cut off, an upper jacket compresses the plastic cylinder downwards to realize sealing under the effect of the gravity of the upper drill stem, and simultaneously drilling fluid circulating runner ports arranged on an inner sleeve and the upper jacket are communicated to realize circulation of the drilling fluid. The invention adopts the fully mechanical operating principle, has the advantages of simple and reliable structure and easy realization, and can realize the sealing of the internal and external annular sealing of the underground drill stem, thereby achieving the function of preventing the blowout, improving the handling efficiency of underground accidents, and reducing the well control risk.

The invention relates to the technical field of unconventional gas pool multi-stage fracturing and particularly relate to a fracturing bridge plug. The bridge plug is used for multi-stage fracturing modification of casing horizontal wells and has the quick removing performance. The bridge plug comprises a fracturing ball, a central tube, a shear pin, a slip, a slip ring, a tapered body, an end rubber sleeve, a middle rubber sleeve and a guiding shoe. The bridge plug is simple in structure and capable of saving the drilling time of every bridge plug of the horizontal well multi-stage fracturing greatly and meeting the low cost requirement and the environment-friendly requirement of exploration and development of low-permeability unconventional oil gas of China.