Method and apparatus for determining fluid viscosity

Details Method and apparatus for determining fluid viscosity Method and apparatus for determining fluid viscosity

2000-03-27

2004-06-29

Williams, Hezron (Department: 2856)

Measuring and testing

Borehole or drilling

Fluid flow measuring or fluid analysis

C073S054040

Reexamination Certificate

active

06755079

ABSTRACT:

BRIEF DESCRIPTION OF THE DRAWINGS
The aspects of the present invention will be set forth in greater detail herein and, in particular, by reference to the illustrative figures described below where like elements have common labels.
FIG. 1
is a schematic illustrating viscosity determination according to Poiseuille's Law.
FIG. 2
is a graph showing for fluids
1
and
2
the display behavior characteristic of Newtonian fluids in laminar flow.
FIG. 3
is shown a schematic of one embodiment of the apparatus of the present invention, showing a spring
22
that is biasing a laminar flow cell
20
against stop
25
.
FIG. 4
is an illustration of bidirectional non-plugging self cleaning embodiment
30
of the present invention, having springs
22
, and flow element
27
.
FIGS. 4A
,
4
B, and
4
c
, are illustrations of optional replacements for flow element
27
, showing respectively, solid cylinder
27
A, small cylinder
27
B, and spiral cylinder
27
C, at A—A of FIG.
4
.
FIG. 4D
is a top view of bidirectional non-plugging self cleaning embodiment
30
, showing stops
31
, at B—B of FIG.
4
.
FIG. 5
is an illustration of tapered self-cleaning embodiment
40
of the present invention, in which the spring-loaded laminar flow element
47
can be tapered (cone shaped) as shown.
FIGS. 6 through 9
have detailed information on the prototype viscosity cell designs of Example 1.
FIGS. 10 through 15
have detailed information on the prototype viscosity cell designs of Example 2.
FIGS. 16A
,
16
B, and
16
C show the determination of both density and viscosity.


REFERENCES:
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patent: 3353403 (1967-11-01), Fredric et al.
patent: 3371527 (1968-03-01), Moulin
patent: 3468158 (1969-09-01), Chien
patent: 3473368 (1969-10-01), Wilbur
patent: 3663477 (1972-05-01), George
patent: 3699042 (1972-10-01), Billy et al.
patent: 3838598 (1974-10-01), Tompkins
patent: 3885429 (1975-05-01), Megyeri et al.
patent: 4641535 (1987-02-01), Malguarnera
patent: 4726219 (1988-02-01), Pearson et al.
patent: 4757709 (1988-07-01), Czernichow
patent: 6119730 (2000-09-01), McMillan
patent: 6176323 (2001-01-01), Weirich et al.
Search Report for International Application No.: PCT/US01/40373.

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