Abstract: Various uses of tetrafluoropropenes, particularly (HFO-1234) in a variety of applications, including refrigeration equipment, are disclosed. These materials are generally useful as refrigerants for heating and cooling, as blowing agents, as aerosol propellants, as solvent composition, and as fire extinguishing and suppressing agents.

Abstract: The present invention provides hydrofluorocarbon compositions suitable for use in a wide range of applications. The compositions of the present invention tend to be soluble in hydrocarbon lubricating oils, and thus, are especially useful in replacing CFC and HCFC compositions in refrigeration applications.

Abstract: A downhole running tool (10) for use in positioning an item, such as a length of tubing (12) , in a bore comprises a body (11, 22) defining a fluid passage, an arrangement (20, 30) for creating a flow restriction, to create an increase in fluid pressure in the passage, and a fluid actuated retaining member (34) mounted on the body for engaging an item (12) to be carried into a bore on the tool (10). The retaining member (34) is in fluid communication with the body fluid passage above the flow restriction arrangement (20, 30) and is movable to a retracted position to release the item (12) by application of fluid pressure forces.