Abstract: A zone to be treated comprises a plurality of sliding sleeve valves. The sleeve defined opposed chambers charged with pressurized fluid on opposed sides of the sleeve. Valves responsive to a remote signal with no borehole intervention change the pressure balance on the sleeve to get it to open from a closed position and then close and then to reopen for production. One way this is done is by sequential pressure bleeding off from the opposed chambers. A zone having multiple such valves can be treated without need for dropping balls and subsequent milling out, which allows production to commence sooner with reduced restrictions to flow from the ball seats and without the debris associated from a milling operation.

Abstract: A lavatory cleansing block is formed of a composition comprising a mixture of (A) a surface active component comprising one or more anionic surface active agents and (B) a halogen release agent component consisting of (i) a halogen release agent selected from N-chloro-succinimide, calcium hypochlorite, chloramine T, dichlorodimethylhydantoin and bromochlorodimethylhydantoin, and, optionally, (ii) another halogen release agent, in which the halogen release component forms from 10 to 65% by weight of the composition, halogen release component (i) forms not less than 5% by weight of the composite and halogen release component (ii), when present, forms not more than 30% by weight of the block.

Abstract: A lavatory cleansing block is formed of a mixture comprising:(a) from 5 to 85% by weight of one or more anionic surface active agents;(b) from 2 to 50% by weight of one or more solubility control agents having a solubility in water less than that of the anionic surface active agent(s); and(c) from 0.5 to 50% by weight of one or more water-soluble salts of polyvalent metals.

Abstract: Horizontal casting apparatus which includes a composite sleeve or ring at the entrance to the mould comprising a graphite inner portion and an insulating outer portion. The apparatus can optionally have an inert gas shield around the composite ring to protect the graphite component thereof against oxidation.

Abstract: Horizontal casting apparatus which includes a composite sleeve or ring at the entrance to the mould comprising a graphite inner portion and an insulating outer portion. The apparatus can optionally have an inert gas shield around the composite ring to protect the graphite component thereof against oxidation.

Abstract: The invention concerns structural joints for the underwater repair of tubular members and comprises first and second connection members which extend towards each other in over-lapping/interleaving relationship, the connection member being securable to the tubular members by resin or friction clamp means and the over-lapping/interleaving fingerplates being securable together by suitable resin or alternatively by resin and mechanical fastening means such as friction bolting.

Abstract: A fluid dispenser comprises a container for fluid having release means coupled with the container which is operatively coupled with an actuating means for effecting periodic operation of the release means to effect release of a portion of the fluid in the container to an outlet. A convection chamber has a lower aperture for permitting entry of air and an upper aperture for permitting exit of air. The chamber is provided with a downwardly extending inner surface which is adsorbent and which is arranged to receive fluid portions from the outlet. The surface permits dispersion of the fluid downwardly on the surface to allow vaporization of the fluid in the convection air flow.