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Патент USA US2404825

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July 30, 1946.
1.. E. BROWN ET AL _
‘
2,404,825
WELL TESTER
Filed Aug. 50, 1941
2 Sheets-Sheet l
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July 30, 1946.
L. E. BROWN ET AL
2,404,825‘
WELL TESTER
Filed Aug. 50, 1941
2 Sheets-Sheet 2
Patented July 30, 1946
‘
2,404,825
UNITED STATES PATENT OFFICE
2,404,825
WELL rns'rnn
Luther E. Brown, Greggton, and Ollin W.
Williams, Mount Enterprise, Tex.
Application August 30, 1941, Serial No. 408,916
5 Claims. (C1. 166-1)
>
1
V
This invention relates to a well tester.
An object of the invention is to provide sample
taking equipment whereby a sample of liquid or
gas may be taken from the side wall of a well
a
2
in external diameter and attached to the lower
end of this coupling is a drill collar 3 to which
a drill ‘4 may be connected.
This drill has the
reduced channels, as 4a, through which the drill'-'
bore at any selected elevation and withdrawn to 5 ing ?uid forced down through the stem is dis
the ground surface for inspection without with
charged. These channels 4a being reduced form
drawing the drill stem.
a choke to reduce the velocity of the drilling
It is another object of the invention to provide
?uid, for a purpose to be hereinafter stated.
equipment of the character described whereby
Instead of the drill 4 any other type of choke
the sample may be taken while the drill stem is 10 may be attached to the lower end of the drill
?lled with drilling ?uid. Therefore, it is ,not
stem, if it should be desired, where drilling is not
necessary to lower an empty drill stem into the
‘being carried on and the tool is used solely for
well and to subject the same to the risk of col
testing. Around the'reduced lower end of the
lapslng from the external pressure in order to
coupling there is an expansible sleeve-like packer
make a test.
.15 5 whose upper end may be secured to the coupling
It is a further object of the invention to pro
2 bya surrounding collar as 6 and whose lower
vide well testing equipment of the character de
end may be secured in place by a surrounding
scribed whereby a ?uid sample may be entrapped
collar as l. The packer when expanded will form
from the side wall of the well bore at any se- ‘ a sealed-off area around the walls of the bore
lected elevation and maintained under pressure 20 so as to seal off the drilling ?uid from said area.
in the sample chamber and withdrawn to the
ground surface for ascertaining the pressure
thereof and for inspection.
-
This is clearly illustrated in Figures 4 and 5.
The lower end of the reduced portion of the
coupling 2 is internally enlarged forming a down
With the above and other objects in View the
wardly facing shoulder 8 and within said lower '
invention has particular relalz'on to certain novel 25 end there is a sleeve valve 9 having the down
features of construction, operation and arrange
wardly facing external shoulder In which is
ment of parts, an example of which is given in
seated on a coil spring H which, in turn, rests
this speci?cation and illustrated in the accom
‘on the upper end of the drill 4. The upper end
panying drawings, wherein:
‘
of the sleeve valve 9 is enlarged and countersunk
Figure 1 shows a fragmentary, vertical, sec 30 in said enlarged portion there is a surrounding
tional view of the drill stem showing also the
seal ring l2. Beneath the shoulder 8 the reduced
packer and valve seats.
lower end of the coupling 2 has a discharge port
Figure 2 shows a similar view thereof showing .
H! which is‘normally closed by the seal ring 42
the lower valve seated.
of the sleeve valve 9. The upper end of the
Figure 3 shows a cross-sectional view taken on 35 valve 9 is provided with a downwardly tapering
the line 3—-3 of Figure 2.
seat E4. The port l3 leads from within the
Figure 4 shows a fragmentary, vertical, sec
coupling 2 and discharges into the packer 5 so
tional view of the drill stem showing the packer ,that liquid forced throughthe port 13, as here
expanded and the upper valve assembly closed.
inafter explained, will expand said packer.
Figure 5 shows a similar view with the upper 40
The upper end of the coupling 2 is enlarged
valve assembly in open position to admit the
internally forming an upwardly facing shoulder
sample into the sample chamber.
l5 on which a coil spring [6 is seated. There is
Figure 6 shows a side view of the assembly with
an upper sleeve valve 11 whose upper end is
the lower valve closed and the upper valve in ‘ enlarged forming a downwardly facing shoulder
position to move downwardly onto its seat to 45 I8 which rests on the upper end of the spring “3.
cause expansion of the packer, and
The enlarged upper end of the sleeve valve I‘!
Figure 7 shows a side elevation, partly in sec
has the spaced countersunk seal rings I9 and 20
tion, of the sample receiving chamber and the
therein which ?t closely within the enlarged
upper valve carried thereby.
‘
upper end of the special coupling 2 and leading
Referring now more particularly to the draw 50 out through the upper end of the valve ll there
ings wherein like numerals of reference desig
is a lateral port 2| located between the upper
nate the same parts in each of the ?gures the
and lower seals l9 and 20. Beneath the shoulder
numeral 1 designates a tubular drill stem as a
[5 the passageway through the coupling 2 is re
whole. Incorporated into the drill stem there
duced forming an upwardly facing shoulder, or
is a special coupling 2 whose lower end is reduced 65 stop 22, The downward movement or the valve
2,404,825
4
I‘! is limited by this stop 22 and the lower end
upper end of the cylinder 32 and will be forced
of the valve is provided with the notches 23 for'
the circulation of liquid. The upper end of the
on downwardly by the pressure of the pump
which forces the drilling ?uid through the drill
stem. The drilling ?uid thus trapped within the
cylinder 32 and within the coupling 2 beneath
valve I1 is downwardly tapered internally form
ing a seat 24.
Leading from this seat down
wardly through the wall of the coupling 2| and
will be placed under pressure and the pressure
through the packer are the inlet channels 25
exerted against the valve 46 will force the sleeve
valve 9 downwardly uncovering the‘ port l3 as
whose lower ends are outwardly vturned through
the packer wall. That portion‘of the channel
shown in Figures 4 and 5 and the ?uid under
25 leading through the ?exible packer 5 is formed 10 pressure will be forced out into, and will expand
by a metal tube 26 which is of su?icient strength
the packer 5 against the walls of the well bore
so that it will not collapse and close the, channel
thus forming a sealed-off area of the stratum to
when the packer is expanded but which is of
be tested. The pump pressure will continue to
su?icient ?exibility to readily ?ex when the
move the barrel 28 on downwardly until the valve
packer is expanded. The upper ends of the chan
36 lands on the seat 24 as shown in Figure 4 with
nels 25 are normally closed by the seal ring 26
the ports 4| and 2| in alignment.
as shown in Figures 1, 2 and 4.
If the packer 5 should be located in a restricted
The numeral 21 designates a sample receiving
portion of the bore, or if for any other reason,‘
said packer cannot be expanded sufficiently to re
chamber having a barrel 23 therein whose upper
end is closed by the tubular head 29 screwed .
into the upper end thereof and by the cable socket
30 screwed into the upper end of said head, A
cable 3| is attached to said cable socket whereby
the barrel may be lowered into and removed from
the drill stem. The lower end of the passageway
through the drill stem is reduced in internal di
ameter forming a cylinder 32 and the lower end
of the barrel 28 has a surrounding seal ring 33
countersunk therein which ?ts closely within said
cylinder 32 when the barrel is lowered. Depend
ing from the lower end of the barrel there is a
tubular stem 34 whose lower end is closed and
which is provided with a side port 35. Slidably
mounted onv this stem there is a downwardly
tapering valve 36 which is shaped to ?t the seat
24 when seated. The valve 36 has the upper and
lower external annular seal rings 31 and'38 coun
tersunk therein to form seals with the seat 24
when the valve 36 is seated therein. It also has
the annular inside upper and lower seal rings 39
and 46 countersunk therein which form seals
with the stem 34. The valve 36 also‘ has a lateral
ceive all of said trapped ?uid the excess may
escape through the channel 50 leading from with
in the packer on up through the coupling 2 to the
outside thereof, The portion of this channel 50
through the packer 5 isv formed by a metal tube 5|
2.5 of su?icient strength to prevent collapsing there
of when the packer is placed under pressure when
expanded. The channel 50 is controlled by an
outwardly opening back pressure valve 52 which
is normally held seated by a strong coil spring 53 '
30 which is of su?icient strength to hold the valve ‘
53 closed until the packer 5 has been fully ex
panded and which will open only under excessive
pressure to permit the escape of the excess of the
trapped ?uid.
'
Additional pressure from the pump at the
ground surface will now overcome the resistance
of the spring 44 and will force theibarrel 26 on
downwardly until the port 35 registers with the
port 4| as shown in Figure 5. Oil, gas or other
40 ?uid in the sealed-"off area of the wall formation
may now ?ow in through the channels 25 into the
tubular stem 34 and on up into the sample cham
port 4| leading out radially therethrough between
ber 28 of the sample receiving barrel 28. The ?uid
said upper and lower seal rings of said valve.
sample will usually ?ow in under pressure and
There is a nut 43 screwed onto the lower end of
when the sample has entered the barrel 28 may
the stem which forms a stop to retain the valve
be elevated by the cable 3|. As the barrel 26 is
Men the stem 34 and there is a strong coil spring
elevated the spring 44 will ?rst operate to hold
44 surrounding the stem 34 and interposed be
the valve 36 against upward movement until the
tween the valve 36 and the lower end of the barrel
port 35 has moved upwardly to closed position as
21. This spring normally holds the valve 36 in 60 shown in Figure 4 and when the nut 43 engages
its lower position on the stem 34 with the seal
the lower end of the valve 36 it will also be lifted
ring 39 closing the port 31. A ?exible tie member,
off of the seat 24 and the spring [6 will move the
such as a chain 45, has its upper end attached
sleeve valve l1 upwardly to carry the port 2| out
to the lower end of thestem 34 and its lower end
of registration with the upper ends of the chan
is attached to the valve 46, This valve has a 55 nels 25 so as to close said channels. The barrel
tapering portion 41 shaped to land on, ‘and to
28‘may be pulled on out of the‘well with the
close, the seat M and beneath said tapering por
entrapped sample therein. The valve 46 of course '
tion is ‘reduced to enter the sleeve valve 9 and is
will also be pulled out with the sample receiving ‘
‘provided with the external seal rings 48, 49 coun
barrel.
tersunk therein to form seals withthe walls of the 60
As the barrel 28 is moved upwardly and before .,
valve 9. The tie member 45 is of such length
the valve 46 has been lifted off of its seat a partial
that the valve 46 will land on and closethe seat
vacuum will be created within the coupling 2
l4 approximately at the same time the seal ring
and the packer 5 will then collapse the ?uid
. 33 enters the upper end of the cylinder 32 and
?owing back into said coupling through the port
65 l4; but in manipulating the tool it may sometimes
before the valve 36 lands on the seat 24.
When a sample is to be taken the drill stem
may be lowered into the well-to a selected loca
happen that the sample receiving chamber 21 will
be suddenly elevated and the valve 46 suddenly
tion with the packer 5 opposite the stratum to be
lifted oil of its seat permitting‘the sleeve valve
tested. The drill stem at this time will be ?lled
9 to close the port l3 before the packer has had
with drilling ?uid. The barrel 28 may then be 70 time 'to collapse. To guard against this contin
dropped, or lowered by the line 3|, down through
gency a channel 54 has been provided which leads
the drill stem with the valve 46 attached. The
from within the packer and discharges, into the
tapering portion 41 of the valve 46 will land on
passageway through the coupling‘ 2 and is con
the seat l4 and close the sleeve valve 9. .At or
trolled by a back pressure valve 55 which is nor
about the same time the seal ring 33 enters the
mally held closed by the spring 56, Should the
2,404,825
5
port I3 be prematurely closed, therefore, the ?uid
within the packer 5 and between it and the re
duced end of the coupling may escape through
the channel 54. If desired, more than one of
these channels 54 may be provided.
.
A choke of some kind at the lower end of the
drill stem is necessary as otherwise the velocity
of the ?uid through the drill stem might move
the valve 9 downwardly and open the port 13
and permit premature expansion of the packer
before the sample receiving chamber 21 and valve
6
wall thereof, sleeve valves normally closing said
openings, an expansible packer around the string
enclosing the lower opening and having an in?ow
channel leading inwardly therethrough and which
continues on to the upper opening, a sample
receiving chamber adapted to be lowered through
the string and having lower and upper means
thereon to land on the lower and upper valves '
in succession to entrap liquid between said valves
and move said valves to open position to permit
the liquid entrapped between the upper and lower
46 are dropped into place.
means to pass into the packer to expand the same
The head 29 of the sample receiving chamber
against the walls of the well to form a sealed off
21 is provided with a valve assembly 51 screwed
area of the wall stratum and to permit the in?ow
through the wall thereof and having a tapped 15 of a ?uid sample from said stratum through said
hole 58 into which a gauge may be screwed for
channel and means for communicating said chan
testing the pressure of the sample in the barrel
nel with the chamber to allow the entrance of
the sample into the chamber.
28 or into which a tubular nipple may be screwed
for permitting the discharge of said sample.
3. A well tester having means for connecting
This valve assembly 51 contains an inwardly open 20 the same to a tubular string of pipewhereby the
ing valve 59 which is normally held closed by
tester may be lowered into a well said tester in
said pressure but which will automatically open
cluding a tubular member having an upper and '
when the gauge or discharge nipple is screwed
a lower opening through the wall thereof, sleeve
valves normally closing said openings and movable
thereby, of the entrapped sample. While going 25 to open positions, an expansible packer enclosing
the lower opening and having an in?ow channel
into the well and while making the test the tapped
into the tapped hole 58 so as to permit the escape,
leading inwardly therethrough and which con
prevent drilling ?uid from entering the sample
tinues on to the upper opening, a sample receiving
chamber. When the tester is withdrawn the
chamber adapted to be lowered into the well and
plug may be removed for allowing the withdrawal 30 having lower and upper means thereon to land
of the sample.
on the lower and upper sleeve valves in succession
to close the passageways through said valves to
With the use of the present invention drilling
hole 58 is closed by a plug screwed therein to
\ of the well bore may progress in the usual man
ner and as drilling progresses a test of the forma
tion may be made at any time desired; also as
many tests of the formation as desired may be
made without withdrawing the drill stem.
The drawings and description are illustrative
entrap‘ liquid in the tubular :‘nem ber between said
valves and to move said valves to open position
to open said upper and lower openings and to
thereby permit the liquid entrapped between the
upper and lower means to pass into the packer
toexpand the same against the walls of‘ the well
merely while it is to be understood that mechani
to form a sealed o? area of the wall stratum and
cal changes may be made without departing from 40 to permit the in?ow of ?uid from said stratum
through said channel and means for communi
the principle of the invention as de?ned by the
appended claims.
cating said channel with the chamber to allow
What we claim is:
the entrance of the ?uid into the chamber. 1
4. Apparatus for obtaining samples of the ?uid
content of earth formations traversed by a bore
hole, comprising a support adapted to be lowered
separate openings through the wall thereof, sleeve
into a bore hole, an enclosure of ?exible material
valves normally closing said openings, an expansi
on the support, means for in?ating and expand
ble packer around the string enclosing one of
ing said enclosure to pack oif the bore hole, test
said openings and having an inflow channel ex
tending through the wall of the packer and open 60 ?uid inlet means in the wall of said enclosure,
means for containing the sample obtained, and
ing outwardly of the packer at one end thereof
means providing communication between said
‘ and which continues on to and communicates
inlet means and sample containing means.
with the other opening at its other end, a sample
5. Apparatus for obtaining samples of the ?uid
receiver adapted to be lowered through the string
and having a sample receiving chamber therein 55 content of earth formations traversed by a bore
hole, comprising a casing adapted to be lowered
and also having means to seat in the valves and
into a bore hole, a sleeve of ?exible material on
close the central bores thereof, in succession to
the casing and secured thereto at the ends there
entrap liquid therebetween, and movable, to move
of, means for introducing ?uid under pressure
said valves to open position to permit the liquid
entrapped between the valve moving means to 60 into said sleeve to expand it into packing posi
pass into the packer to expand the same against
tion in the bore hole, ?uid inlet means in said
the walls of the well to form a sealed off area of
sleeve and intermediate the ends thereof, sample
containing means in the casing, a conduit com
the wall stratum and to permit the in?ow of a
municating with said ?uid inlet means and sam
?uid sample through said channel and means
for communicating said channel with the cham 65 ple containing means, and valve means in the
casing for controlling communication between
ber to allow the entrance of the sample into the
said ?uid inlet means and sample containing
chamber.
2. A well tester comprising a tubular string of
means.
pipe adapted to be lowered into a well and hav
LUTHER E. BROWN.
1. A well tester comprising a tubularstring of
pipe adapted to be lowered into a well and having
ing an upper and a lower opening through the
OLLIN W. WIILIAMB.
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