Abstract: A sealing assembly is disclosed, the sealing assembly comprising a plurality of components including an upper sealing element and a lower sealing element, the sealing assembly configured to encircle a tubular string positioned within a casing of a wellbore. The sealing assembly is configured to be actuatable to extend sealing elements between the tubular string and an inner surface of the casing to form a fluid seal between the tubular element and the inner surface of the casing.

Abstract: A lower packer, seal stinger, upper packer, running tool, and setting tool is positioned into the wellbore. A force is applied by the setting tool, which causes the seal stinger to be pushed into a seal receptacle of the lower packer. The seal stinger is pushed by pushing the running tool which causes the upper packer to be pushed which causes the seal stinger to be pushed. A force is also applied by an internal rod of the setting tool to pull the running tool which causes the running tool to hold the lower packer in place as the seal stinger is pushed into the seal receptacle. The running tool and setting tool is then removed from the wellbore, wherein the lower packer, seal stinger, and upper packer comprise the straddle assembly.

Abstract: A lower packer, seal stinger, upper packer, running tool, and setting tool is positioned into the wellbore. A force is applied by the setting tool, which causes the seal stinger to be pushed into a seal receptacle of the lower packer. The seal stinger is pushed by pushing the running tool which causes the upper packer to be pushed which causes the seal stinger to be pushed. A force is also applied by an internal rod of the setting tool to pull the running tool which causes the running tool to hold the lower packer in place as the seal stinger is pushed into the seal receptacle. The running tool and setting tool is then removed from the wellbore, wherein the lower packer, seal stinger, and upper packer comprise the straddle assembly.

Abstract: An apparatus (100) for forming a laminate of pre-preg composite material comprises supply means (200) to supply pre-preg strip (400) to a stationary mandrel (300). The pre-preg strip (400) is formed into a tube (410) on the mandrel (300), and is driven to both rotate relative to the mandrel and to move axially along the mandrel. In this way it can be dispensed from an end of the mandrel (300) and formed in to a further pre-preg strip (420) with off-axis fibres.

Abstract: Compositions for treating timber, especially timber to be exposed to the ground, comprising creosote and a compound of formula I: ##STR1## wherein Z and Z.sup.1 are the same or different and are each halo, halophenyl or haloalkyl, X is hydrogen or cyano, and Y is hydrogen or a fluorine atom.The preferred pyrethroid is Permethrin.The compositions are unusually stable and have a prolonged protective action against termites, beetles, molluscs, woodworm and the like.

Abstract: Compositions for treating timber, especially timber to be exposed to the ground, comprising creosote and a compound of formula I: ##STR1## wherein Z and Z.sup.1 are the same or different and are each halo, halophenyl or haloalkyl, X is hydrogen or cyano, and Y is hydrogen or a fluorine atom.The preferred pyrethroid is Permethrin.The compositions are unusually stable and have a prolonged protective action against termites, beetles, molluscs, woodworm and the like.

Abstract: Apparatus for use in the detection of leaks comprising an annular flexible, gas permeable skirt carried by and projecting from a carrier member which closes one axial end of the skirt. The opposite axial end of the skirt is closed in use by engagement with the surface being searched, such that the surface and the carrier member contain between them a sample volume bounded by the skirt. The apparatus further includes a sensing probe communicating with the sample volume for detecting the presence of a signal gas in the sample volume.