摘要:
Circulating completion, workover and drilling fluids used in hydrocarbon recovery are filtered after monitoring for viscosity, which frequently causes plugging of filters. A viscometer generates a signal representative of viscosity in the fluid; the signal is used by a programmable controller to divert viscous fluid from the filter, or to take other action to prevent damage to the filter. The viscometer can be used in various positions in the system. Fluids deemed too viscous for the filter can be sent to a viscosity-reducing device, which may be a heating, shear-thinning, or cavitation device, to reduce its viscosity, enabling the fluid to pass through a filter without fouling. After filtering and a return to a lower temperature, the fluid may be treated if necessary to become viscous again for a useful purpose. A temperature monitor can be deployed on the fluid emerging or downstream from the cavitation or other device to assist in correlating temperatures to viscosities of various fluids. The cavitation device can also be used to increase the concentration of a dilute polymer-containing fluid to a usefully viscous value.
摘要:
Cesium solutions are treated in a cavitation device to increase their temperature and facilitate the removal of water from them. The context is normally an oil well fluid or a mining solution. The concentrated solutions can be reused, in the case of oil well fluids, or more easily handled for recovery of the elemental cesium or cesium in the form of a salt. Thermal energy is saved by using the concentrate or the water vapor to heat various streams within the system.
摘要:
A medical device includes a control handle, an end effector, and a passive articulating joint connecting the end effector to the handle. The handle has a stapling actuator, an articulation joint actuator different from the stapling actuator, and a body through which the stapling and articulation joint actuators traverse. The end effector has an anvil, a stapler cartridge with staples, and an anvil-cartridge control device connected thereto and to the stapling actuator and staples when the stapling actuator is actuated. The stapling actuator passes through the articulating joint and flexes correspondingly to articulation of the articulating joint. The articulation joint actuator, when unactuated, holds the articulation joint and, thereby, the end effector, in a substantially fixed articulation position, and, when actuated, releases the articulation joint into its freely articulating state to permit free articulation of the end effector dependent upon external forces acting upon the end effector.
摘要:
A cavitation device is used to heat and facilitation the separation of mixtures and emulsions of oil and water. Waste heat from the power source for the cavitation device may be utilized to elevate the temperature of incoming mixtures or emulsions. The heated mixture of emulsion is sent to a separation vessel where vapor may be removed and/or recovered, and where oil is removed as it separates into an identifiable layer. The separation vessel may be a flash tank.
摘要:
The present invention provides a composition comprising one or more than one isotactic, modified polypropylene (MPP) or polypropylene-α-olefin copolymer (MPP copolymer) and one or more than one polymer or resin, wherein said MPP or MPP copolymer is modified with one or more than one carboxyl or anhydride, preferably maleic acid or anhydride, or with one or more than one epoxy or hydroxyl group. Alternatively, the present invention provides a composition comprising an adduct which is the reaction product of one or more than one isotactic, modified polypropylene (MPP) or isotactic, modified polypropylene-α-olefin copolymer (MPP copolymer) with one or more than one carboxyl, anhydride, epoxy or hydroxyl functional reactant, polymer or resin. The composition may be used to make aqueous or solvent borne compositions for making primers, coatings, powder coatings, films, laminates, moldings and shaped-articles having good adhesion to thermoplastic polyolefins (TPO) or polyolefin, while partly or wholly avoiding use of environmentally harmful chlorinated polyolefin (CPO) additives. The isotactic MPP or MPP copolymer preferably has one or two terminal carboxyl, anhydride, epoxy or hydroxyl group. More preferably, the isotactic MPP or MPP copolymer has a low molecular weight and a melting point of from 70 to 145° C., preferably 80 to 105° C. for MPP copolymer and preferably 105 to 120° C. for an MPP homopolymer, and provides excellent penetration into TPO or polyolefin substrates.
摘要:
A computer-implemented system and method for generating data graphical displays. The data is indicative of a plurality of variables. The system and method receive data that is to be displayed in a non-textual format. Graph style data items are retrieved that contain display characteristics for displaying the data in the non-textual format. The data is displayed in accordance with the graph style data items.
摘要:
A method for operating a surgical end effector, includes articulatingly connecting a control handle to the end effector and positioning an articulation joint actuator of the handle to selectively connect with an articulation lock of the end effector such that, when unactuated, the articulation joint actuator automatically connects with the articulation lock to lock the articulation lock and temporarily prevent further articulating motion of the end effector and, when actuated, the articulation joint actuator is removed from the articulation lock to unlock the articulation lock and, thereby, permit articulating motion of the end effector dependent upon external forces acting upon the end effector. The articulation joint actuator is actuated to unlock the articulation lock and the end effector is contacted with the environment to passively articulate the end effector into a desired articulated position. Removal of actuation locks the articulation lock and retains the end effector in the desired articulated position.
摘要:
A simple disposable pant-like garment includes a chassis and an absorbent assembly. The chassis, which can be extensible, includes a water-impermeable sheet folded laterally inward at both of its side edges to form opposing side flaps. Each side flap is attached to the interior surface of the chassis adjacent to its end edges. Each side flap has a longitudinally extending elastic gathering member attached adjacent to its proximal edge. The absorbent assembly is smaller in width and in length than the chassis. The side edges and end edges of the absorbent assembly can be disposed proximally relative to the respective side edges and end edges of the chassis. The absorbent assembly includes an absorbent core that can contain superabsorbent particles contained inside pockets. The absorbent assembly may be attached in a cruciform pattern to the chassis to allow portions of the chassis to extend laterally.
摘要:
A disposable absorbent article includes two laterally opposing longitudinally extending backsheet strips attached to an exterior surface of an absorbent assembly in laterally opposing attachment zones. Each backsheet strip may include a water-impermeable layer and may be extensible. The absorbent assembly includes a lower covering sheet that is doubled by folding and thereby includes a first layer and a second layer. The absorbent assembly also includes laterally opposing side flaps which are formed by folding doubled portions of the lower covering sheet laterally inward. A longitudinally extending elastic gathering member is attached to each side flap adjacent to its proximal edge. When the article is worn, the elastic gathering members contract and raise the side flaps to form side barriers.
摘要:
A screen for separating solids and liquids is formed from parallel strips of wedge wire or similar material into a substantially cylindrical two-sided enclosure in a generally C-shaped profile. Unfiltered liquid containing solids contacts the screen surface on both the convex and concave sides of the C-shaped enclosure. The unit may be placed in a vessel adapted to accommodate two such C-shaped devices in concentric relationship. The vessel may function similar to a candle filter, or a more conventional flow may be used.