At the same time, they were facing competition from other geophysical methods such as magnetics, gravity and especially seismics. It is still necessary to rely on estimates in the performance of a conventional formation test under the above stated conditions concerning the gas-oil relationship of the liquid present in the layer to be investigated, as well as the important physical characteristics of the oil with 4the gases in solution at the pressure and temperature prevailing at the layer, which estimates can vary within large limits. Further, technological developments are occurring all the time, so specific operating details will not be given here. The O-ring 19' also seals the valve body 18' at the inner edge 22 thereof relative to the valve seat 23' with which the valve body 1S' makes contact when the valve is in the closed position thereof. A sample taker for liquids from layers found in deep drilling comprising tubing adapted to be inserted in a drilling hole,. Alternatively, in the construction depicted in FIG.
List of abbreviations in oil and gas exploration and production - Wikipedia
The catching dog assembly arrangement of FIGS. Simple tools capable of capturing cc of reservoir fluids at reservoir conditions. When the valve assemblies are closed, the slots 2S and 28' in the annular pistons 27 and 27 are positioned opposite the bores 29 and 29of the valve cases 36 and This means efficient and speedy completion of the various stages of recovery, boxing, sampling, geological evaluation, and shipping.
Formation-test tools must be run by experienced engineers and wireline operators. The prongs 51" each have abuttments and carry rods of square cross-section as shown in FIG. This occurs when the formation testing assembly is run into the bore hole. The collection of reservoir-fluid samples by formation-test tools was originally a secondary benefit to their use for measuring pore pressures. The sample taker, as set forth in claim 1, wherein said valve rods have annular grooves over a part of their axial length, a stopper cap disposed in each of said valve bodies opposite said annular grooves, a second spring disposed in each of said valve bodies and urging -said stopper caps into said grooves and retaining said valves in their closed position, such that an increased outer pressure relative to the inner pressure of said sample taker cannot open said plug Valves.
The American Petroleum Institute publishes a detailed recommended practice,  which is the most complete industry standard covering the sampling of pressurized hydrocarbon fluids. In this work, which summarized the result of experiments he had made by flowing water through a sand-filled cylindrical tube, he postulated that flow through the sand was linearly proportional to the pressure drop across the sand. He conceived the idea of a hollow tubular tool set with diamonds cutters at one end and with circulating fluid passing through. At the commencement of the relative upward movement of the piston 4, and before the by-pass valve is opened, the releasing rod 7 which is attached to the lower end of piston 4, engages the split ring 8' to which the coupling 8, and the left arm of the double-armed lever 9" are attached through the medium of screw S" connected therebetween. Guide sleeves 30 are welded at opposite ends of the sample taker to the inside of the extension collars 3 and 3 and function as guides for the outer end of the valve assemblies. It should be consulted for additional information to that presented here. Simultaneously with the closing of the upper valve assembly, the pull rod 13 is pulled upwardly by the coupling 8 and screw to move the left arm of the lever 15 upwardly to a corresponding extent about pivot pin