George Fancher, James Lewis and Kenneth Barnes ran the first courses and embarked on a unique three-year core collection and analysis project. During the performance of the flow test fluid originating from the formation tested passes from the lower part of the tester string to the sample taker, penetrating thereinto at the lower end thereof through the sieve plate 3?. The valves are opened when the sample taker is lowered into the bore hole. The sample taker, as set forth in claim 1, which includes. The sample taker is built into the test string of a conventional formation testing device, as for example that described in the article Formation Testing Fundamentals referred to hereinabove, and is located therein below the tester valve, the by-pass valve, and the closed in pressure valve and reversing parts of the conventional formation testing string. This allowed the inner barrel to remain stationary to receive a core while the outer barrel was rotated by the drillstring to cut the core. The O-ring 19' functions to seal the valve in its closed position within a generally cylindrically formed recess provided at the inner end of the valve case.
List of abbreviations in oil and gas exploration and production - Wikipedia
List of abbreviations in oil and gas exploration and production
This requires that the fluid in the sampler be maintained in a single-phase condition during the entire sample-transfer process or, if the fluid is in a two-phase condition, that the entire contents of the sampler be transferred. The sample taker, as set forth in claim 3, which includes syphon tubes disposed axially below the upper of said plug valves and above the lower of said plug valves, said syphon tubes displacing the liquid originally present in said sample taker and feeding fluid originating in the layers into said sample taker. The said Siphon head 31, which carries the upper siphon pipe 31, is provided with a very small upwardly tapered hole or ow bean If the samplers are supplied by a service company, this approach can reduce rental charges for the downhole samplers.
This attachment may be made below by the closed-in pressure and circulating valve and the tester valve and by-pass valve, and above the packer, or alternatively, immediately below the closed-in pressure and circulating valve and above the tester valve and by-pass valve and packer. The sampler should be heated if wax or asphaltenes are present. Nevertheless, collected samples almost always contain some contamination from mud filtrate and sometimes from small quantities of water used to fill connecting lines during tool preparation. The sample chamber valves are constructed to hermetically seal the liquid sample contents of the sample chamber therewithin. The entire catching dog assembly is maintained in a xed position by means of screws 24S.
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. In order to open a by-pass valve of this nature at the end of the formation testing operation, the drill pipe in the upper portion of the tester string to which the piston 4 FIG. His new coring tool became the basis for all rotary core barrels used today. In fact, Marcel Schlumberger had already tried resistivity measurements in the borehole in This condition, of course, is objectionable and highly dangerous, and means have been proposed, as for example those disclosed in U. The latter are in turn supported by a cap sleeve , which is secured to the sleeve by means of screws 24m.