Abstract: A digester-evaporator interface for partially digesting a sample mixed in a solvent with an acid and for evaporating the solvent and the acid after partial digestion, said digester-evaporator including a digester portion and an evaporator portion.

Abstract: A fiber optic probe mounting assembly has an inner assembly which receives an optical fiber cable and holds it in a sealed alignment. The inner assembly is sealingly received in an outer assembly which is provided with means for attachment to a pressure vessel.

Abstract: A downhole steam sampler for collecting the liquid phase content of a steam flow, immediately prior to the latter being injected into a substrate surrounding a hole or well. A reservoir within the sampler separates and retains the liquid phase while permitting the vaporous phase to pass. Detent means cooperates with a pair of spaced apart flow control valves to permit said valves to be closed simultaneously when the steam sampling operation is completed. The detent means is actuated in response to withdrawal of the sampler from the well, an action which displaces an externally positioned sleeve.

Abstract: A downhole steam sampler for collecting the liquid phase content of a steam flow, immediately prior to the latter being injected into a substrate surrounding a hole or well. A reservoir within the sampler separates and retains the liquid phase while permitting the vaporous phase to pass. Detent means cooperates with a pair of spaced apart flow control valves to permit said valves to be closed simultaneously when the steam sampling operation is completed.

Abstract: A method applicable to secondary recovery procedure employing an injection well. It applies to conditions caused by return flow of injection fluid back into the well from the formation being injected. It frees the well and injected formation from heavy paraffinic-aromatic residue that is carried by the return flow.

Abstract: Method and apparatus for determining the quality of typical steam used in steam flooding for secondary recovery of petroleum, using a modification of the conventional throttling calorimeter based on thermodynamic properties of the steam. Automatic continuous operation with heat added thereto is also disclosed.

Abstract: Method and apparatus for obtaining a sample of the liquid component of steam and determining the quality of steam in a vessel or the like, such as steam flowing in a line used for steam injection in an oil well. The steam quality is determined by the known method of comparing the concentrations of dissolved solids in the liquid sample and the feedwater. A sample of the liquid phase of steam is trapped in a liquid vapor separator maintained at steam line temperature and pressure conditions. In this way errors due to condensation in the separator and its connecting lines are avoided. The sample is withdrawn from the separator into a collection chamber at a controlled rate which avoids reducing the pressure within the separator and thereby avoids the introduction of error because of erroneous concentration of dissolved solids within the separator sample.