摘要:
A choke for removing large diameter particulate matter from an oil or natural gas well includes a housing having a chamber with an integral solids receptacle. The chamber is in communication with a flow stream outlet and a flow stream inlet. The flow stream inlet is located below the flow stream outlet. The flow stream inlet directly adjoins the integral solids receptacle in the chamber. The choke includes a solids removal outlet located below the flow stream inlet in communication with the chamber for flowing particulate from the chamber when actuatedby a user. The choke includes a needle disposed in a bonnet connected to the chamber above the flow stream inlet for controlling the flow stream from the flow stream inlet to the flow stream outlet by engaging a choke face of a seat with the needle.
摘要:
A kit for converting an existing wireline retrievable surface controlled subsurface safety valve (170, 270, 370) into a bypass passageway apparatus (100) allowing the injection of production-enhancing fluid into a wellbore while maintaining the operation of the closure member (374). Bypass passageway (280) can extend between upper (260) and lower (275) adapters external to the existing wireline retrievable surface controlled subsurface safety valve (270) to allow fluid injection bypass thereof. Conversion kit can include a tubing string hanger to suspend a velocity tubing string (407, 507), a gas lift valve (475) for gas lift operations, a locking mandrel (220), and/or a spacer tube (240).
摘要:
The present disclosure is directed to a method comprising introducing into a well bore a fluid comprising a zwitterionic polymer. The polymer is prepared by inverse emulsion polymerization of at least one monomer Ab comprising a betaine group and optionally one or more nonionic monomers Ba. The well bore is chosen from a natural gas well bore and an oil well bore.
摘要:
A recoil suppression system for the stock of a firearm that includes an absorption assembly having an elongated body portion and a generally flat mounting plate having an outer periphery. The recoil suppression system includes a recoil housing with a piston ram, which is received into a cavity of the elongated body when the recoil housing is assembled with the absorption assembly. The mounting plate is generally shaped to fit the rear end of a firearm stock. A rearward projecting flange of the absorption assembly is adapted to fit within the recoil housing. The outer periphery of the mounting plate is equal to or larger than the outer periphery of the recoil housing. The absorption assembly may include a cam and torsion spring to reduce the recoil of the firearm. The recoil suppression system may include an adjustment mechanism to vary the preload force of the torsion spring.
摘要:
The application discloses a safety valve including a flapper valve and a packer assembly to be installed in a bore to isolate a first zone from a second zone. Preferably, the safety valve includes a hydraulic conduit bypassing the flapper valve to allow communication therethrough when the valve is closed. Furthermore, the safety valve preferably allows unobstructed passage of tools and fluids therethrough when the flapper valve is open. The application discloses a method to install a safety valve in an existing string of tubing by deploying a packer assembly having an integral safety valve.
摘要:
A headworn listening device includes a right ear assembly and a left ear assembly interconnected by a headband. The headworn listening device is preferably comfortable to wear and provides high-quality audio and flexible signal processing features without requiring customized fitting. The listening device includes a signal processor with programmable signal processing characteristics and a memory storing a plurality of user-selectable signal processing settings. For example, there may be signal processing settings for different environments, such as a first setting for a quiet environment and a second setting for a noisy environment. In operation, a user actuates a user-operable control coupled to a microcontroller to select a desired signal processing setting.
摘要:
A storm plug for temporarily isolating an offshore well in deep water includes a retrievable service packer connected to a valve housing containing a movable isolation sleeve and a standing valve. The standing valve precludes the fluid flow through a portion of the isolation sleeve. The isolation sleeve being hydraulically actuated from an open position to a closed position. In the open position, fluid may flow through flow ports in the standing valve to an annular bypass area between the valve housing and the isolation sleeve. In the closed position, the isolation sleeve prevents fluid flow through the valve housing. The valve may be hydraulically actuated as compared to conventional storm valve that are set by workstring rotation. The running tool used to run the storm plug into the well may be hydraulically disconnected from the valve housing.
摘要:
Presented is a subsurface safety valve in which the flapper mount, hard seat and spring housing have been integrated into a single assembly. To accommodate a “soft seat insert,” a special retainer soft seat ring and soft seat seal are provided. The soft seat seal fits over a conical protruding surface (hard seat) that surrounds the main bore of the safety valve on the bottom side of the spring housing. The retainer ring fits over the soft seat seal and holds it in place against the conical surface. Notches along the perimeter of an upper flanged end of the soft seat seal prevent gases, such as nitrogen, from becoming trapped behind the seal and potentially damaging it during a rapid decompression event. A gap between the upper flanged end of the soft seat seal and the lower spring housing allow the seal to move up and down the conical protruding surface as the flapper opens and closes, reducing compression of the seal and the risk of a compression set due to repeated opening and closing of the flapper.