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Патент USA US2406192

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- Aug. 20, 1946. w
c. o. CANTRELL, JR
7
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‘2,405,192
v SAMPLING APFARATUS
Filed Jan. 26, 1943
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FLOW L..I_NE MANIFOLD
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VAPOR
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INVENTOR.
'c.o. CANTRELL. JR.
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ATTORNEYS.
Patented Aug. 20, 1946
_ 2,406,192
a
UNITED 'STATES' PATENT OFFICE
SAMPLING APPARATUS‘ '
Cyrus D. Cantrell, Jr., Bartlesville, 0kla., assignor‘
to Phillips Petroleum Company, a corporation
of Delaware
Application January 26, 1943, Serial No. 473,653
4 Claims. (Cl. 137F166)
1
2
particularly to obtaining representative samples
of ?uids being conveyed through conduits, and
'
.
operation and where ‘all wells producing into a
This invention relates to sampling and more
i central storage battery system must be pro
duced continuously and Without ‘interruption.
The weight and space occupied by this complete
sampling apparatus are such that the Whole is
easily portable on a light truck or trailer and
is a continuation-in-part of my prior ?led appli
cation which ‘mat‘ured as U. S. Patent No.
2,309,625, ,on Feb. 2, 1943.
It is often very desirable to know the amount
of ?uid being produced by a hydrocarbon oil well
thus can be used' to serve several tank batteries
for routine tests, or for special well-testing prob;
lems, and thereby eliminate the-permanent ‘test
and the'quantity of each component part of that
?uid. This knowledge is useful in determining l0 equipment otherwise necessary.‘ In the case of
centralized tank batteries serving a large num
e?icient production rates for a hydrocarbon oil
well and is necessary for determining the amount
ber of widely scattered wells,‘ this device would
of hydrocarbon'oil and gas reserves within a
eliminate long individual ?ow lines to that bat
tery, or standard test equipment at the 'junction
reservoir.
‘
Standard practice is to produce a hydrocarbon 15 of each small group of ?owlines.
' ‘ .
The primary’ object‘ of this invention is to 'pro
oil well into a separation system consisting of
‘an oil and gas separator and appropriate re
vide an improved ?uid sampling apparatus. ' '
Another object is to provide an improved ap
paratus for taking a representative sample of
and water are separated one from the other and
the oil stored. If two or more wells produce 20 ?uid from a conduit.
.
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'
into a single separation system or tank battery
A still further object is the provision ofv an
improved apparatus for taking a representative ,
it is necessary to shut in all the other wells when
sample of ?uid produced from a hydrocarbon
it is desired to test one well. Shutting in the
oil well, said sample being taken at some desir
other wells may be undesirable because of dif
?culty in reviving flow, settling of sand in pump 25 able point in a’ lease ?uid conduit system for
the purpose of testing component parts of the
ing equipment, and other common troubles, as
ceivers, stock tanks, and the like, where oil, gas,
Well as loss of production during the shut-in
period. When testing of individual wells is of
primary importance, a special testing system is
provided. In the case of high ‘pressure ?owing
wells, the complete test system requires a sub
stantial investment in equipment even though
necessary auxiliary vessels to, the oil and gas
separator are often omitted at the price of ?ex
ibility, accuracy, and safety. In either case it
?uid.
These and 'additional objects and
‘
advantages
' ‘
will be readily apparent to persons skilled in the
art by reference to the following description and
annexed drawing which pertains to' a preferred
embodiment of my invention, and wherein
Figure‘ 1 represents a positive displacement
30
type of device, partly in central longitudinal
cross section, for obtaining representative fluid
is often necessary to limit the length of the test
to shorter periods than are necessary for most
accurate results.
Figure 2 denotes a typical conduit and separa
tion system for a group of hydrocarbon oil wells
The practice of my invention simpli?es the
procedure of testing individual wells by installing
incorporated therein.
samples; and,
y
j
'
and having the sampling apparatus of Figure l
a sampling device in the lease ?uid conduit sys
tem between the well and the tank battery sys
‘ V
For the purpose of illustration, the application
tem. By cutting-out a representative sample ‘of
a predetermined fraction of the total ?uid pass
of this invention is shown with respect to obtain
ing samples of ?uid as produced from a 'hydro-.
carbon oil well and as conveyed through the cus
ing through the conduit, accurately testing that
fraction and returning the‘ same to the origi
' tomary lease conduit system. It is to be under
stood that this is only one of the many usesito
which. thisdevice may be satisfactorily andveco
nal volume, a well may be tested for any desir
able length of time without interrupting the oper
ations of the other wells producing into a cen
tral tank battery system.
‘
y
nomically applied ‘in actual practice.
'
i
'7 The present invention also eliminates the em
ployment of duplicate systems of separators, re->
ceiving tanks, and/or storage tanks which are
essential with the present methods of well test
ing where individual well tests are av necessary"
. - ,
Referring to Figure 1, I have illustrated there
60 in a closed cylinder or chamber I that commu
nicates with an inlet conduit 2 through‘ a valve
chest 3 and ports 4 and 5, alternately opened,
and closed by a slide valve 6 ?xed to a valve rodv
1 which is coupled to a crosshead8. Cylinder]
also " communicates with outlet ‘or. exhaust ' cone.
2,406,192
7
3
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duits 9 and Ill through a valve chest II and
exhaust ports I2 and I3 which are alternately
opened and closed by a slide valve I4 ?xed to a
slide rod I5 and crosshead 8. Cylinder I 0on1
tains a piston I6 secured to a piston rod H which
is slidable through one end of the cylinder. At
tached to crosshead 8 is ,a valve-operating mech
anism includingza member. I8, thatjisr?xedly
secured to'the crossh'ead and movable therewith,
4
r
the arrows; that both ends of the cylinder ar
?lled with well ?uid; and, that the positions of
the slide valves 6 and I4 are shown, with port 4
closed, port 5 open, port I3 closed, and port I2
open. The fluid entering conduit 2 is under sub
stantially the same pressure as that existing in
the test ?owline 35 and causing the ?ow of ?uid
through it, and this pressure is: exerted against
the right-hand side of" piston I6; The pressure
and a plate I9 having a recess or notch 29. Plate 10 on the left-hand side of piston I6 is allowed to
I9 is slidable with respect to member I8‘ and} l '7 be less than that on the opposite side by adjust
ment of regulating valves 60 and ‘62, so that pis
crosshead 8. Member l8 carries a pair of latches
ton Itv moves toward the left. As the right-hand
~2I and 24 which are pivoted at 23 and'25, re
end of: thecyli'nder-?lls with ?uid through con
spectively. Each of said latches is prdvidedlwith,
a downwardly extending portion, that is adapted ' duit‘ 2 theleft-hand end discharges ?uid through
conduit 19. As- piston I6 moves toward the left,
to engage notch 20 depending upon the relative
arm. 29 engagesand. compresses spring 21. Com
position of member I8 and‘ plate. I9; and an up
pression of springv 21 continues until arm 29’en
wardly extending portion. A compression spring
gages" and depresses the upwardly extending por-,
22 tends to rotate latch 2| in a clockwise direc-v
tion of latch 2|, thus compressing spring 22 and
tion about its pivot point 23, vwhile a similar
releasing; the downwardly extending‘ portion of
spring ZE'tends to rotate; latch 24 in- a. counter
latch 2.! from notch 20-. At this. pointxm'em‘ber
CIOCKWZIISGKdiI‘GCtiOHT about itsv pivot point 25,. ,As
I8< slides to the left on plate I9’ moving crosshead
willTbe-no‘te‘d froman examination of Figure: 1,
8, valve rods ‘I and, I5, andslidevalves ‘6 and I4
member. I8 is so positioned with respect to plate
to the left the distance‘ d in Figure 1. When
I59 that" the downwardly extending portion of
slide valves 6 and I4 have reachedv a position such
latch’: 21 has‘ been received in notch. 29', whereas
that ports 4- and I3 are open; the downwardly
the corresponding. portion“ of. latch 24 rests on
extending portion of latch 2-4. is forced to? drop
the-upper surface of plate: I9’. A pair of ‘prefer
into notch 20> by spring 26 and locks slidevalves
ablly coaxiallyrdisposedr compressionsprings ‘21
6 and I4, connecting: valve rods ‘I and I5, and
and :28 are attached to‘ member 58 and are
'crosshead 8 and memberIB in thenew position. .
adapted-to be “alternately ‘compressed by an arm
Fluid entering conduit '2. now exerts pressure
29lithat'is secured tolvalve rod I'I.
against piston It on the left end. thereof cause
fTur-nin‘gnext' to-the system illustrated inFig
ing piston I6 to move to the right the distance
ure 2',‘I'have denoted therein a plurality of well
8 and discharge the ?uid in the, right end of cyl
?owlines 39, 3I, 32, and33, each of which come
inder I_ through port I3 into conduit I0. Piston
municates with-a separate producing oil well. A
litrmoves to the right until arm 29 engages and
main ?owline'34 ‘connects with well flowlines 35,
compresses spring 28 and ?nally depresses and
3I', 32,:and133 through. valved ‘branch lines 35, 37,
releases latch 24 from notch 25], allowing mem
38, and Y39, respectively. A test ?owline 35 also
connects with well ?owlines‘ 39, 3!, 32, and 33 40 her‘ I8 to slide to the right on plate, I9 and to
move slidevalves 6 and I4 to the right through
through ‘valved branch lines 49-, M; 42, and 43,
respectively. Main ?owline 34 discharges-into a ' valve rods ‘I and, I5 and crosshead 8 through dis.
tance d. When valves ,6 and I4 have again
tank battery hookup that'may be of any known
reached the position shown in Figure 1, with'ports
design such as the illustrated arrangement of
5 and I2 open and ports 4, and I3 closed, latch
equipment which. consists in its essential ele
2! drops againlinto recess 29 andlocks the valve
ments of. a: gas-liquid'separator 44 that commu
mechanism in this position; Fluid now reenters
nicateswith a boot 45 which in turn communi
the‘right'end of cylinder I through port 15/ and
cates with. a plurality of stock tanks 46 that are
conduit 2, comprising onev cycle ofv operation of
connectedinxseries; 7 .Gas: that‘is'separated from
the-"well; ?uid in"; separator 441s taken off over- ‘
one cylinderunit of the device.
head; through a line 41 as allowed-bye pressure
Referring to Figure 2, let us assume it is de-'
sired to sample and meter the componentparts
of oil, water, and gas ?owing from the Well C011?
nected to well ?owline 3.3 and to make certain
tests upon the oil and gas at predetermined con
ditions-of separation. Flowline 30 is cut out of
regulator device~48.' ‘Vapors evolved‘ in boot 45
and stock‘ tanks. 43 are transmitted therefrom '
through‘avapor-line49.
'
'
Te‘st?owline.v 35dischargesv into a battery con
taining cylinders 5 I, v52, 53, and 54, each of which .
V isipreferably identical in design'with the‘mech
anism> described-in Figure-71; As shown in the
Figure‘v 2‘, one of the two discharge conduits of»
'
I
?owl-ine 34.- by closing branch line 35 and open- '
ing branch line 49, leaving branch lines 31,33,
and 39 open, and closing branch lines 4!, 42, and
‘ each cylinder, namely, conduit I0, is connected GO 43. The'?uid in line 39 now all ?ows through
?ow test line 35. Fluid from ?ow 1ine 35 enters
toaareturn conduit 59. whilethe other discharge
conduitv namely,~conduit 9, is connected to the
next ‘cylinder except’ in’ the case of cylinder 7 54
wheres'aid ' other-‘discharge. conduit 9 is connected
toza small’test separator'56; Separator 55 is con
nectedrtolareceivin'g tank S-l-by a conduit Y53; and
to~a1gas-meter<33'by a- conduit 64;
Return con
duit 59 is connected-to"main?owline 34.
59, 55,
and: 62' are appropriate check and regulating
valves;~
Referringirto 'Figure 1, in’ operation’ ?uid
from‘za- hydrocarbon oil‘ well enters" cylindrical
chamber‘ I " through conduit 2-‘.
Let us assume»
cylinder 5| through conduit 2. Cylinder 5| di
vides the ?uid- admitted thereinto into’ two equal
parts; the right end’ discharges fluid» into con
duit I9 and-the left end into conduit 9. Conduit
IIl'discharges ?uid intov return line- 59, which con
ducts the ?uid back into main ?owline 34. Con
duit 9'conducts- the fluid from the left‘end of
the cylinder to the inlet‘ conduit of cylinder 52;.
Cylinder 52 divides the ?uid passing through con-v
duit. 9 into two equal parts. also, discharging
one-halfinto- return "linerv 59; and the other half
into cylinder~53-. Any- number of cylinders‘con...
that‘pis'ton I6? is .in- thelposition shown in Figure
nectedjinseries may be employed dependingrlupon
1 and ii is! moving in the’ direction - indicated ; by?
" thendcsiredquantityw ofthejfinall; sample; Which‘:
2,406,192
5
6
decreases in a geometric progression. For exam
ceeding cylinder of the series being connected to
the ?uid sampler line of each preceding cylinder
of the series, the ?uid discharge line of each
cylinder communicating with the ?ow conduit
ple, two cylinders would permit taking a sam
ple which is an exact ‘A of the initial quantity in
weight and composition. Three cylinders would
provide a sample of 1/8; four cylinder, Tie; ?ve Cl down stream of the intake means of the ?rst
cylinders, £5; and so on. If the sampling period
cylinder of the series, and a sample receiving
is sufficiently long, the law of averages will op
receptacle connected to the ?uid sampler line of
erate to allow the composition of the sample to
the last cylinder of the series.
be quantitatively the same as that of the total
2. A system of the character described com
' ?uid flow during the test period, and the weight 10 prising a plurality of well ?ow lines adapted to
to be the predetermined exact fraction.
transmit ?uid produced by corresponding oil
In employing the system shown in Figure 2, the
wells, a main ?ow line, a test ?ow line, valved
?nal sample enters the small separator 56 where
means for placing the well flow lines into and
the gas is separated from the oil and Water, The
out of communication with the main ?ow line and
gas passes through conduit 64 to gas meter 63 15 the test ?ow line as desired, a plurality of means
where its volume is measured. The oil and water
arranged in series for successively dividing ?uid
pass from separator 56 through conduit 58‘to re
transmitted into each of them into substantially
ceiving tank 51, where they are separated by
equal parts, each of said plurality of means in
gravity and their volumes are measured. By
cluding a cylinder, a piston reciprocable Within
multiplying the weight of the components of the
the cylinder, intake means including a valve op
sample by the reciprocal of the fraction by which
erated by said piston at each end of its stroke
it was reduced, the weight of each component
for alternately conveying ?uid into each end of
which ?owed from the well during the test period
the cylinder, a ?uid sampler line and a ?uid dis
is determined with a high degree of accuracy.
charge line connected to the cylinder, and means
It is to be understood that the above form of 25 including a valve for alternately discharging ?uid
my invention herewith shown and described is to
conveyed into the cylinder through the ?uid sam
be taken as a preferred example of the same and
pler line and the ?uid discharge line during each
that various changes in size, shape, and arrange
complete stroke of the piston, the intake means
ment or application may be resorted to without
of the ?rst cylinder of the series being connected
departing from the spirit of the invention, and
to the test ?ow line, the intake means of each
further, that the theories of operation, as set out
succeeding cylinder of the series being connected
to the ?uid sampler line of each preceding cylin
in this invention, although believed to be sound
and workable, are not to be construed as the sole
der of the series, the ?uid discharge line of each
cylinder communicating with the main ?ow line
basis for operating this device. This device op
erates successfully whether or not upon the prin- .\ down stream of the connection of the test ?ow
ciples described herein, and is to be limited only
line with the main ?ow line, and a sample re
by the appended claims. Further it is to be un
ceiving receptacle connected to the ?uid sampler
derstood that the phrase “a sample receptacle”
line of the last cylinder of the series.
3. In an apparatus for obtaining representa
when used in the claims refers not only to a sepa
rator such as 56 but also to the succeeding cylin 4-0 tive samples of a ?owing stream of ?uid, a main
ders such as 52, 53 and 54.
I claim:
?ow line for said stream, a cylinder, a piston re
'
,
l. A system of the character described com
prising a ?uid ?ow conduit; a plurality of means
arranged in series for successively dividing fluid
admitted into each of them into substantially
equal parts, each of said means including a cylin
der, a piston reciprocable within the cylinder,
intake means including a valve operated by said
piston at the end of each stroke thereof for al
ternately conveying ?uid into each end of the
cylinder, a ?uid sampler line and a ?uid discharge
line connected to the cylinder, and means in
cluding a valve for alternately discharging ?uid
admitted into the cylinder through the ?uid sam_
pler line and the ?uid discharge line during each
complete stroke of the piston, the intake means
of the ?rst cylinder of the series being connected
to the ?ow conduit, the intake means of each suc
ciprocable within the cylinder, means including
a valve for alternatively conveying ?uid from the
main ?ow line at a given point into each end of
the cylinder, a ?uid sampler line vconnected to
one end of said cylinder, a sample receptacle con
nected to said ?uid sampler line, a discharge line
connecting the other end of said cylinder to said
main ?ow line down stream of said given point,
and means including a valve for alternately es
tablishing communication between the cylinder
and said sampler and discharge lines, whereby a
given quantity of ?uid from the main line is
delivered in de?nite proportions to said sample
receptacle and back into said main ?ow line.
4. In the combination of claim 3, each of said
means including a valve including means actu
ated by said piston for operating said valves.
CYRUS D. C'ANTRELL, JR.
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