A new tool has been developed for, in one aspect, facilitating release of a tubular string coupled between a travelling block and elevators with insufficient clearance to release elevator slips in order to remove the tubular. In one aspect the releasing tool is effectively shortened permitting release of the elevators. Such shortening is effected by releasing an expansion sub and piston within the tool for relative movement with respect to other parts of the tool. Initially the expansion sub and...

An antistatic releasing sheet for use with adhesive tapes or sheets includes a separation layer formed on a paper backing mixed with conductive filler. A colored layer, such as a white pigment, may be formed between the paper backing and the separation layer.

There are disclosed a releasing sheet comprising a substrate and a releasing agent layer which is installed by coating the substrate with a releasing agent liquid containing 1,4-polybutadiene and an antioxidant, and irradiating the coated layer with ultraviolet ray so that the layer is cured; and also a releasing sheet comprising in turn a substrate, an undercoat layer which is formed thereon and is composed of an elastic body, and a releasing agent layer which is installed on the undercoat laye...

A releasing film comprising: a base film produced from a polyethylene naphthalate, and a releasing layer formed on one or both sides of the base film, wherein the polyethylene naphthalate contains naphthalenedicarboxylic acid as the main acid component and ethylene glycol as the main glycol component and further contains a manganese compound, a phosphorus compound and an antimony compound in Mn, P and Sb amounts satisfying all of the following formulas (1) to (3): (wherein Mn is moles of mangane...

A releasing agent containing: (A) a copolymer which is produced by copolymerization of: (a) a monomer mixture comprising 70 to 40 percent by weight (hereafter represented by "wt. %") stearyl acrylate and/or stearyl methacrylate and 30 to 60 wt. % acrylonitrile; and (b) an ethylenically unsaturated compound being copolymerizable with the monomer mixture and having functional groups reactive with metal alcoholate, the ethylenically unsaturated compound being used in an amount of 0.5 to 30 part by ...

A releasing device for rocket fuel lines, arranged between a tank outlet and a shutoff valve, which releases the flow path at a defined, tank-side overpressure, with a piston-like bursting element. A disk is provided with a predetermined breaking point and with a clamping flange, as well as a guide rod that is rigidly attached to the disk, and a catching basket that is permeable to flow and fixes the disk in a positive-locking manner after rupture and axial movement. The bursting element is asse...

A header has three throughpins supported by glass insulating regions in the header wall having inside and outside portions. A releasable terminal formed with a central opening is soldered to each inside portion of a throughpin and is formed with a groove that carries a lock washer or C-clip that stops a spring in compression stopped at the other end by an epoxy layer adjacent to the inside of the header wall. The assembly is formed by inserting throughpins through the openings, baking the glass ...

A releasing assembly includes a lever provided with a first engaging element, a seat having a hole defined in a bottom of the seat and a cutout defined in a periphery of the seat to communicate with the hole, a releasing head having a column formed on the releasing head to extend into the hole of the seat, a second engaging element formed on a side face of the column to engage with the first engaging element and a ring formed on a bottom of the releasing head for hanging an object and a power su...

A releasing apparatus for removing a shuttering from a molding such as a concrete panel. This releasing apparatus is of such an arrangement that an erectable frame for erecting and laying down a shuttering bed between a carry-in position and an erected position is erectedly provided on a base frame, a molding receiving mechanism is provided for receiving only a molding disposed on the shuttering bed in a state where the erectable frame is erected, and, after the molding has been received, the er...

A releasing device for disconnecting a buoyant body from an anchor a predetermined period after having been sunk into water. In order to accomplish a reliable device, which may be stored for very long periods of time, a piston is movable in a cylinder under the influence of a spring and a water pressure differential. The piston controls the disconnection of the buoyant body and the anchor, as the cylinder is connected to one part and the piston will release an element connected to the other part...