Pressurized fluid density balance

Details Pressurized fluid density balance Pressurized fluid density balance

1996-05-03

1997-12-30

Oda, Christine K.

Measuring and testing

Gas analysis

Density or specific gravity

73 3004, 73433, G01N 900

Patent

active

057032785

ABSTRACT:
A conventional fluid density balance beam measurement instrument used for measuring fluid density at atmospheric pressure is converted for use to measure fluid density at super-atmospheric pressure. The conversion is made without modifying the structure of the conventional instrument. A pressure lid, placed over the open mouth of the instrument's sample cup, is held in place by a removable retaining structure that wraps around the base of the cup. A screw ring at the top of the retainer applies a retaining pressure against the lid. Pressure is applied to the cup through a check valve stem extending through the lid. An adjustable flange on the rim of the lid permits the lid to advance into the cup to change the cup volume for sizing the cup to obtain a precisely known volume for measurement. A counterweight is removably connected to the balance beam to compensate for the weight added by the lid and retaining structure. A weight compartment in the counterweight permits the addition of small amounts of weight to calibrate the balance beam. The lid, retaining structure and counterweight are removable to return the instrument to its conventional configuration for normal atmospheric measurements.

REFERENCES:
patent: 3747415 (1973-07-01), Nickles et al.
patent: 4095473 (1978-06-01), Batchelor
patent: 4374474 (1983-02-01), Cain
Fann Permeability Plugging Apparatus Instruction Manual Authored and published by Fann Instrument Co., P.O. Box 4350, Houston, Tx 77210 in 1995. (no month).
Halliburton Tru-Wate Cup Operating Instructions, 15 pages authored and published by Halliburton, P.O. Drawer 1431, Duncan, Ok 73536 before May 3, 1995.

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