SU141831A1 - Device for downhole determination of parameters of reservoir oils - Google Patents

Description

The known devices for determining the parameters of the formations of the NSTs allow measurement to be carried out only after the extraction of the sample. Ia surface.

The described device allows to determine the relationship between pressure and sample volume directly at the bottom of a well, which eliminates errors caused by its rise, and also reduces the time for testing the sample. This is achieved by using a recorder in the device, the pen of which is connected to a helicoidal manometric spring rigidly connected to the piston moving as the sample volume changes.

The drawing shows a schematic diagram of the device.

Taking into account that oil expansion occurs at the bottom of a well at a constant temperature, the process should be considered as thermal. The increase in the volume of the sample occurs in the working chamber /, which causes the movement of the normal 2 in the axial direction of the polt, the action of the energy of the compressed sample. Together with the piston 2, the rod 5 moves, in the expanded end of which is placed the bellows 4 associated with the helix 5, equipped with a feather 6, writing on the cylindrical cartogram 7. From the chamber 1, the pressurized fluid passes through a channel in the piston 2 and a channel 1 3 and acts on the bellows 4, due to which the helix unwinds and rotates the feather. But, since the pen simultaneously moves the piston in the axial direction, a pressure-volume record is recorded in the coordinates. To slow down the movement of the piston, a hydraulic time relay was used, in which oil flows from volume 8 to volume 9 through an opening in the non-recess. Y

The working chamber 1 is filled with reservoir fluid through the windows in the housing 11, which are closed by a valve 12 connected to the piston body, ff,,

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It comes from YlaH 1YG / 5, squeezing spring locks 14. Plastova tem3f fa. m§1 | maximum mercury manometer 15.

post Az1 || 1 | The prototype of the device successfully passed 13 Waters ™ s T1Spyta1 | i.

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A device for downhole determination of parameters of reservoir oil by determining the relationship between pressure and volume, containing a variable volume sampler, a hydraulic relay and a stirrer, characterized in that, in order to simplify the determination of dependency between pressure and sample volume, as well as to improve the reliability of measurements a recorder, the feather of which is connected to a helicoidal manometric spring rigidly connected to the piston moving as the sample volume changes.

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