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Патент USA US3090333

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May 21, 1963
B. F. SCHMIDT
3,090,324
SAND TRAPPING SUCKER-ROD FOR PISTON TYPE OIL WELL PUMP
Filed Sept. 22. 1960
2 Sheets-Sheet l
A
ii
/17
K
. INVENTOR.
Henjam 7'72. 115277211582‘:
BY
4
v I‘,
y.
May 21, 1963
B. F. SCHMIDT
3,090,324
SAND TRAPPING SUCKER-ROD FOR PISTON TYPE OIL WELL PUMP
Filed Sept. 22, 1960
2 Sheets-Sheet 2
INVENTOR.
.
(0772')? 27'. 505721121‘;
BY
I /;
/
Att '1.
United States Patent 0
1
CC
3,090,324
Patented May 21, 1963
1
2
3,090,324
an upright length of the production portion of a cylin
drical pump tubing as positioned in a well, B denotes a
SAND TRAPPING SUCKER-ROD FOR PISTON
TYPE OIL WELL PUMP
Benjamin F. Schmidt, 450 Fairview Ave.,
Sierra Madre, Calif.
Filed Sept. 22, 1960, Ser. No. 57,661
12 Claims. (Cl. 103—220)
length of cylindrical sucker-rod extending longitudinally
of said tubing centrally thereof in spaced relation thereto,
and C indicates generally the sand capturing device of
which a plurality of such devices is mounted on the
sucker-rod at spaced intervals along the length theerof as
occasion may require. The sucker rod B connects at its
lower end with a piston in a pump barrel B’ in a usual
This invention relates to oil well pumps of the piston
type and particularly pertains to the construction of a 10 manner.
sucker-rod therefor.
‘In the form of the invention shown in FIGS. 1 to 4 in
The primary object of the invention is to provide a
clusive, the sand capturing device C embodies a pair of
sucker-rod with means for capturing sand settling out of
upper and lower members of which the upper member
the body of oil standing in the production tubing of an
comprises an upwardly opening annular sand collecting
oil ‘well pump when the pump is idle, thereby preventing 15 cup D in the ‘form of an inverted truncated cone, it hav
the accumulation of such sand on the pump barrel when
ing a downwardly and inwardly inclined side wall 5 lead
the pump is out of operation and which ordinarily will
ing from an annular horizontally extending rim 6 and
interfere with either starting the pump or eifecting its re
converging into intersection with a cylindrical sleeve 7
moval from the well.
constituting the lower end of the upper member.
Aonther object is to provide a sand trapping device for 20
The lower member embodies an annular sand collect
attachment to a sucker-rod which is adapted to be ap
ing cup E having a cylindrical outer side wall 8 and a
plied to a sucker-rod in multiple according to require
frustro-conical or upwardly and inwardly inclined inner
ments and whereby a sucker-rod may be equipped with
side ‘wall 9 which walls 8-9 are united by a rounded or
whatever number of such devices as may be needed to
concave bottom wall 10. The cylindrical side wall 8. has
capture all, or at least substantially all, the sand as may 25 ‘an upwardly presented even or leevl margin 11, spaced
possibly settle out of a given volume of a particular crude
concentrically from the frustro-conical inner wall 9 in~
oil as determined by test or experience.
termediate the ends thereof. The upper portion of the
Another object is to provide a construction in a sand
conical wall 9 projects above the plane of the margin v11
trapping device of the above character, whereby on an
of the side wall 8, and connects at its upper end with a
uppermost device in a series thereof becoming ?lled to 30 cylindrical sleeve 12 constituting the upper end of the
capacity any over?ow of sand therefrom will ‘be delivered
lower member.
to a subjacent device and so on successively throughout
the series of the devices.
A further object is to provide a construction in the
The conical inner wall 9 diverges downwardly and out
wardly on its under side in spaced relation to the perim
eter of the sucker-rod and thereby affords a downwardly
sand trapping device whereby sand accumulated therein 35 opening space 13 between the wall 9 and the sucker-rod
may be evacuated therefrom by the upward ?ow of oil
and has a plurality of circumferentially spaced rectan
past the device on resumption of operation of the pump,
gular sand discharge apertures 14 therein leading to the
and whereby the sand will be mingled with the oil being
space 13 which apertures are arranged with their lower
pumped and carried therewith to discharge.
end portions extending ‘below the plane of the margin 1-1
With the foregoing objects in view together with such 40 of the outer side wall 8 and with their upper portions pro
other objects and advantages as may subsequently ap
jecting above the plane of the margin 11. The apertures
pear, the invention resides in the parts and in the com
bination, construction and arrangement of parts herein
after described and claimed, and as illustrated by Way of
14 of a superincumbent sand trapping device C on the
sucker-rod B will thus be disposed above the open upper
end of the cup D of the underlying device C, as shown in
45 FIG. 1.
example in the accompanying drawing in which:
FIG. 1 is a view partly in section and partly in eleva
Projecting outwardly from a side margin of each aper
tion of a length of sucker rod equipped with a plurality
ture 14 is a curved vane 15 adapted to de?ect streams of
of sand trapping or capturing devices, showing one ‘form
oil ?owing upwardly through the apertures 14 as Will
of the invention, and depicting it as arranged in a length
presently be described. The sleeves 7 and 12 of the cups
50
of pump tubing as disposed in a 'well with the liquid con
D and E are here shown as telescopically interengaged
tent of the tubing omitted;
with each other and collectively assembled on the sucker
FIG. 2 is a horizontal section and plan view taken on
rod with a sliding ?t. On being disposed on the sucker
the line 2—2 of FIG. 1 with portions broken away;
rod in a desired position the cups D-E are rigidly at
FIG. 3 is a view in vertical section with parts in eleva~
tached to the sucker-rod by set screws 16 or in any other
55
tion of one of the sand capturing devices, depicting the
suitable manner. Manifestly the cups D and B may be
manner in which sand is collected therein to over?owing
independently mounted on the sucker-rod.
while the sucker rod to which it is attached is stationary;
In practice the side wall 8 of the cup E has an external
FIG. 4 is a similar view illustrating the manner in
diameter slightly less than the internal diameter of the
which sand is evacuated from the device when the pump
pump tubing A to afford a space 17 therearound for the
60
is in operation; by the ?ow of oil being pumped as indi
cated by arrows;
passage of crude oil being pumped, while the external
diameter of the rim 6 of the cup D is of a lesser diameter
than the side Wall 8 of the cup E whereby sand over?ow
ing the rim 6 of the cup D will fall into the cup E as in
length of sucker rod equipped with another form of the
dicated in FIG. 3.
invention;
65
The rim 6 of the cup; 1) and the side wall 8 of the cup
FIG. 6 is a detail in cross section taken on the line 6-6
E extend in concentric relation to each other and to the
of FIG. 5;
FIG. 5 is a View in elevation partly in section of a
FIG. 7 is a cross section as seen on the line 7—7 of
sucker-rod B and as a means for centering the sucker-rod
B in the pump tubing A to prevent the side walls 8 from
FIG. 8 is a view in section and elevation depicting a 70 coming into contact with the inner surface of the pump
tubing, the sucker-rod is equipped with a suitable num~
modi?ed form of the invention.
her of spacers 18 in a manner common in oil well piston
FIG. 5; and
Referring to the drawing more speci?cally A indicates
7 pump construction.
3,090,324
3
clamp .F as shown in the’ upper portion of FIG. 5 and in
In the operation of the form of invention above de
scribed, upon the percentage of the sand content of the
oil of a well to be pumped being ascertained, and the
volume of sand‘ which is apt to settle out of a column of
oil in the pump tubing is calculated, a series of the sand
trapping devices C is mounted on the sucker-rod B along
the length thereof leading from the pump barrel B’, such
series comprising such number of the devices C as is
calculated to collect the amount of sand as will settle
out'of the oil.
The sucker-rod B thus equipped and its associated
pump is lowered into the pump tubing A and the pump
set in operation in the usual manner by reciprocating the
FIG. 6, or by means of spot welds G as shown in the
lower portion of FIG. 5 and also in‘ FIG. 7. Mani
festly any other suitable means may be employed in
fastening the cups E on the sucker-rod.
In mounting the cups E on the sucker-rod, adjacent
cups are preferably arranged with the apertures 14 on
one of the cups disposed in circumferentially off-set rela
tion to the apertures 14 of the adjacent cup as shown in
FIG. 5 whereby sand over?owing through the apertures
4 of the superimposed cup E will fall onto the conical
wall 9 of the sub-jacent cup E and thereby be directed
into the latter cup which with the shielding action of the
vanes 15 thereon serves to permit only a modicum of
sucker-rod B, thereby effecting the flow of pumped crude
oil upwardly through the pump tubing, which oil passes 15 the precipitating sands to pass directly from the upper
cup through the apertures 14 of the cup immediately
around and through the sand trapping devices C. Mani
therebeneath. In this fashion a substantial quantity of
festly while oil is being pumped and in motion the sand
sand will be collected in each cup progressively down
content thereof will ?ow to discharge therewith but when
ward from the uppermost cup according to the duration
the pumping operation ceases and the body of oil in the
pump tubing A and the sucker-rod B are static, the sand‘ 20 of the static condition of the oil in the pump tube and
the proportion of the sand content of the oil, the sand
will precipitate. A portion of the precipitated sand will
accumulating in a superimcumbent cup until it is ?lled
fall into the uppermost cup D while another portion
to a point of ‘overflowing the lower end margins of the
thereof will fall past the cup D and be deposited in the
apertures 14 whereupon sand will be discharged through
underlying cup E; When the uppermost cup D becomes
‘
full to over?owing as indicated in FIG. 1, the surplus 25 the-apertures 14 as before stated.
The cups E collect sand being precipitated from static
sand will fall from the margin of the cup I) and then be
oil thereabove when the sucker-rod is stationary, with
delivered to the cup E as indicated in FIG. 3, where sand
over?owing sand from superimcumbent cups passing to
is collected and retained until the cup E is ?lled su?l
subjacent cups through the apertures 14 in the tapered
ciently to cause over?ow of surplus sand through the
apertures 14 from which such surplus sand falls into 30 inner walls 9 of the cups. On resuming the pumping
operation the sands collected in the cups will be scav
the cup D of the subjacent sand trapping device C. In
enged therefrom by the relative movement of the cups
this fashion the precipitating sand will be accumulated
and surrounding oil on downstroke of the sucker-rod in
progressively in the downwardly succeeding sand trap
the manner before described.
ping devices C as long as the oil column in the pump
tubing is static.
'
'
35
‘
0n resuming the pumping operation after a shut-down
on upstroke of the sucker-rod, the sand trapping devices
thereon and the column of oil in the pump tubing will
move upward coincidently therewith. On downstroke of
the sucker-rod, the sand trapping devices will be moved
downwardly through the oil column thereby causing dis
placed oil to flow rapidly through the spaces 17 around
While the invention has been hereinbefore set forth
speci?cally it is subject to modi?cation according to
varying conditions and requirements. For example in
some instances the vanes 15 may be dispensed with, and
in others both the apertures 14 and vanes may be elim
inated, as where a single annular cup E or a few of such
cups would serve to collect substantially all the sand
that would settle out of the crude oil in a particular well
in a given time. The invention therefore embraces such
changes and modi?cations as come within the meaning
the side walls 8 of the cups E past the margins 11, through
the apertures 14, and then past the rims 6 of the down
'
wardly moving cups D. This relative movement of the 45 and scope of the appended claims.
Furthermore, while the invention has been above de
cups D—E and oil operates to disturb the'bodies of sand
scribed as applied to the sucker-rod of a reciprocal piston
accumulatedin the cups D—-E such as to act, on a few
pump it is also applicable for use in wells employing
strokes of the sucker-rod, to cause evacuation of the sand
other types of pumping mechanism such, for example,
from the cups D——E and effect its intermingling with the
oil so as to be carried by the oil to discharge.
This 50 as a powered pump in the bottom of a well which acts
to pump the oil upward to discharge through the pro
action is augmented in removing sand from the’cups E
duction tube A in the well known manner. In this in
by eddies developed in the cups E by the ?ow of oil
stance a multiple of the sand collecting cups E are sus
through the apertures 14 and the de?ection of the streams
pended in the tube A by means of a cable Has shown in
of oil passing through such apertures by the vanes 15
projecting from vmargins of the apertures 14, which eddies 55 FIG. 8'. In this instance the cup E is lowered into the
well tube and suspended therein inde?nitely since they
effect such agitation and disturbance of the sand as to
act to collect sand primarily during 'a' shut-down of the
facilitate its transfer into the surrounding oil. The ?ow
pumping operation and ‘are subsequently emptied by
of oil past the rim‘7 and margin 1d of the cups D—E
acts to induct sand from the cups and also to create
liquid being pumped as before described.
I claim:
‘
'
i
eddies tending to disperse the sand collected in the cups 60
1. In an oil well structure ‘embodying a production
so that it will cO-mingle with the oil for later conveyance
tube through which oil is ?owed from the well by a
in suspension in the oil 'as it is pumped to discharge.
pumping operation, a multiple of sand collecting cups in
The ?ow of oil ‘past the sand collectors C during the
said tube, and means for supporting saidcups in spaced
downstroke of the sucker-rod is indicated by arrows in
65 relation to each other along a length of said tube, each
FIG. 5.
'
In the modi?ed form of the invention shown in FIGS.
of said cups being annular ‘and including a bottom wall,
5, 6 and 7 the cups D are dispensed with land the sand
an outer side wall and an upstanding inner side wall;
' collectors ‘composed solely of the above described an
said inner side wall having greater extent axially of said
nular cups E, a plurality of which are mounted on the
production tube than said ‘outer side wall and having a
sucker-rod B with adjacent cups spaced suitable dis 70 portion thereof between its ends circumferentially spaced
tances apart. In’ this instance thesleeves 12 of the cups
E‘ have'open ended longitudinal slots 0.0 to permit ex
pansion and contraction thereof whereby the sleeves may
from said means for support in said cups; and said por
tions of said inner side wall of said cups having aper
tures therein for upward passage of pumped well ?uid
be‘ telescoped on the sucker-rod B in snug engagement
therethrough
to dislodge. sands collected insaid cups.
therewith and rigidly secured thereto as by means of a_ 75
3,090,324
2. The structure called for in claim 1 in which said
cup supporting means comprises a pump rod.
3. The structure called for in claim 1 in which said
cup supporting means comprises a cable.
4. In a sand trap for installation in the production
tubing of an oil well, an annular sand collecting cup hav
ing a bottom wall, an outer cylindrical side wall and an
upwardly converging inner side wall, said inner side wall,
6
second upwardly opening sand collecting cup, means sup
porting said second cup above and adjacent said ?rst
named cup, said second cup having an annular rim the
external diameter of which is less than the internal diam
eter of the margin of said ?rst named cup and arranged
in concentric relation to said margin whereby sand over
?owing the rim of said second cup will fall into said
?rst named cup.
extending above the upper edge of said outer side wall,
9. In a stand trap for positioning within the production
means for supporting said cup within the production tub 10 tubing of an oil well, a pair of upper and lower sand col
ing, said side wall being spaced from said tubing for the
lecting cups, means for supporting said cups within a well
upward ?ow of oil between said cup and tubing exterior
tubing in vertically spaced concentric relation to each
ly of said outer side wall, said inner side wall having
other, the lower of said cups having a cylindrical outer
apertures extending above and below said outer side wall
side wall with an upwardly presented margin, the upper
in upwardly spaced relation to said bottom wall and 15 of said cups having an annular rim of lesser diameter than
through which oil may ?ow upwardly and over sand
that of the outer side wall of the lower cup whereby sand
collected in said cup from the inner side of the cup; the
over?owing the rim of the upper cup' will ‘be deposited
flow of oil past the outer side of the cup and through
in the lower cup, and means for directing a ?ow of oil
said apertures acting to evacuate sand from said cup
being pumped outwardly over a body of sand collected
into the upwardly ?owing oil.
20 in said lower cup to evacuate sand from said cup com
5. The structure called for in claim 4 together with
prising an inner annular side wall on said lower cup
vanes on said inner wall extending into the path of oil
having apertures therein opening above such body of
?owing through said apertures to de?ect at least a por
sand.
tion of such oil downwardly so as to agitate sand col
10. In a sand trap for positioning within the production
lected in said cup.
25 tubing of an oil well, a pair of upper and lower sand col
6. A sand trap comprising an annular sand collecting
lecting cups, means for supporting said cups within a well
cup, means for supporting said cup within the production
tubing in vertically spaced concentric relation to each
tubing of an oil well, said cup embodying a cylindrical
other, the lower of said cups having a cylindrical outer
outer side wall having an external diameter less than
side wall with an upwardly presented margin, the upper
the internal diameter of the tubing into which said cup 30 of said cups having an annular rim of lesser diameter than
is to be supported to a?ord a space around said outer
that of the outer side wall of the lower cup whereby sand
side wall for the passage of oil being pumped, said cup
over?owing the rim of the upper cup will be deposited in
also embodying a frustro-conical inner side wall and an
the lower cup, and means for directing a ?ow of oil being
imperforate bottom wall uniting the lower portions of
pumped outwardly over a body of sand collected in said
said outer and inner side walls, said outer side wall hav 35 lower cup to evacuate sand from said cup, said means
ing an upwardly presented margin spaced concentrically
comprising an upwardly and inwardly inclined inner side
from said frustro-conical inner side wall intermediate
wall in said lower cup extending above the margin thereof,
the upper and lower ends of said inner side wall whereby
said inner side wall having apertures therein opening
the upper portion of said frustro-conical inner side wall
above said margin from the underside of said inner side
projects above the plane of said margin of said outer 40 wall.
side wall, said frustro-conical inner side wall diverging
11. The structure called for in claim 101 in which said
downwardly and outwardly on its under side and having
apertures also open below said margin whereby sand de
a plurality of circumferentially spaced sand discharge
posited in said lower cup may over?ow through said aper
apertures therein opening to the space interiorly of sald
tures.‘
45
inner side wall, said apertures extending above and below
12. The structure called for in claim 10% together with
the plane of the margin of said outer side wall whereby
oil de?ecting vanes on said inner side wall adjacent said
sand collected in said cup may over?ow in part through
apertures for developing eddies in the oil ?owing through
said apertures to agitate sand deposited in said cup.
said apertures when oil in said tubing is static, and where
by when oil in said tubing is being pumped a portion
References Cited in the tile of this patent
of such oil will be directed through said apertures from 50
the underside of said frustro-conical inner side wall and
UNITED STATES PATENTS
thereby evacuate sand from said cup.
257,779
Stewart et a1 ___________ __ May 9, 1892
7. The structure called for in claim 6 together with oil
1,519,042
Osborne ______________ __ Dec. 9, 1924
de?ecting vanes on and projecting outwardly from said
55 1,656,526
Lincoln ______________ __ Ian. ‘17, 1928
frustro-conical inner side wall at the margins of said
2,267,459
Hait ________________ __ Dec. 23, 1941
apertures for developing eddies in the oil ?owing through
said apertures to agitate sand deposited in said cup.
8. The structure called for in claim 7 together with a
2,669,940
Crake ___________ _‘_____ Feb. 23, 1954
2,692,051
2,834,300
Webb ________________ __ Oct. 19, 1954
Brock _______________ __ May 13, 1958
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