Abstract: A fire-barrier comprises a composite of three types of fire-retardant materials operable sequentially to combat an increase in temperature, e.g. as occurs on outbreak of a fire, by different methods. A preferred combination of materials is an outer layer of heat reflective material, an inner layer of thermally intumescent material and an intermediate layer of endothermal material between the inner and outer layers.

Abstract: A flexible pipe comprises an inner supporting pipe (1) made from an elastic material, onto which inner supporting pipe a shaped strip (2) is wound. Said strip (2) has a cross-section profile formed by two stepwise conjugated quadrangular flanges (3) and (4), the height of each of the flanges being equal to a half of the height of the profile. The adjacent turns of the strip (2) partially overlap each other so that the upper flange (3) of one turn is superimposed onto the lower flange (4) of the other flange, and the ends of the flanges (3) and (4) are aligned. An interlayer (5) made from an elastic material is superimposed onto the power frame formed by the strip (2). At least one pair of reinforcing layers (6) and (7) formed by groups of power filaments (8) and (9) is disposed on said interlayer (5), said filaments being parallel to one another and wound in contrary at angles of from 0 to 20.degree. to the axis of the pipe.

Abstract: A flexible conduit with a quadrangular hollow casing-shaped wire in the side wall of the conduit and extending the length of the conduit. The casing-shaped wire has at one side bent unjoined and overlapping extremities of the metal strip from which the wire is formed and is capable of receiving a hydraulic or electrical control line therein.

Abstract: An anti-holiday cable armor for submersible electrical cables comprising two generally helically wrapped, overlapping metal straps, the second metal strap being wrapped longitudinally in a direction opposite to the direction of wrap on the first metal strap, for providing anti-holiday protection when the cable is pulled in either direction is disclosed.

Abstract: An evaporative thermal protection system for use in hostile environment well logging applications, the system including a downhole thermal protection cartridge disposed within a well logging sonde or tool to keep a payload such as sensors and support electronics cool, the cartridge carrying either an active evaporative system for refrigeration or a passive evaporative system, both exhausting to the surface through an armored flexible fluidic communication mechanical cable.

Abstract: According to the invention a flexible drill pipe constructed of a closed pitch cylindrical spiral coil of wire rod with a floating core of tube sections constructed the same positioned end to end but not attached through the hollow center of the coil of wire rod to keep the coil of wire rod from collapsing under torsion loads required for a drilling operation. A thin wall hose is laid through the tube sections so drilling fluids can be pumped through the flexible drill pipe during a drilling operation.

Abstract: A hollow flexible tubular body which comprises at least one tubular layer. The layer is formed by adjacent helical windings having hooked edges and substantially flat sections. The turns of the helix do not show any spontaneous tendency to increase in diameter.

Abstract: The invention relates to a flexible elongated member provided with a reinforcing armouring formed by profiled rods. The convolutions of said reinforcing armouring are wound in such a manner that the moment of inertia of the cross section of the profiled rods is maximum with respect to an axis perpendicular to a radial direction of the elongated member.

Abstract: Combined strengthening and corrosion protection of a ferrous metal pipeline is obtained by means of a wrap of ferrous metal strip, the strip being coated with a less noble metal, such as zinc or aluminum or a zinc alloy or an aluminum alloy, and the strip being under sufficient tension to strengthen and reinforce the pipe or to arrest fracture propagation. The less noble metal coating of the strip is electrically connected to the pipe to provide cathodic protection for the pipe. A coating of electrically insulating material may be interposed between the pipe and the wrap. An external power source may be utilized for primary cathodic protection in which case the coated strip is relied upon as a secondary or back-up system.

Abstract: In the described process for the manufacture of reinforced hoses of elastomeric material having a hollow space in their wall, said hollow space is formed by means of a structural shape helically positioned between the two assemblies of layers which constitute in their whole the wall of the hose, and during curing the hollow space is filled with a material inert to curing, which is discharged in liquid state from the hollow space after curing.