close

Вход

Забыли?

вход по аккаунту

?

Патент USA US2151416

код для вставки
March 21, 1939-
Y
J. P. BLACK ET AL
2,151,416
PERFORATION CLEANER
Filed May 3, 1938
.
//
Q
A/axmeo 6’. 57205554
2,151,416‘
Y Patented Mar. '21, 1939
PATENT OFFICE
; UNITED STATES
2,151,416
PERFORATION CLEANER
Julian P. Black, Los Angeles, and Howard C.
Stroebel, Whittier, Calif.
Application May a, 1938, Serial No. 205,746
7 Claims.
(Cl. 166-18)
which will be made manifest in the following de
This invention relates to a perforation cleaner tailed description and specifically pointed out in
designed for cleaning the perforations in liners the appended claims, reference is had to the
of oil wells and the like, although it may be accompanying drawing for an illustrative em
used for analogous purposes.‘
of the invention, wherein:
5
In oil wells there ~is generally positioned a bodiment
Figure l is a view in-side elevation‘ of the im
in production liner at the bottom of the well casing
proved perforation cleaner;
which extends into the producing zone or forma
Fig. 2 is a horizontal section taken substan
tion. These liners are perforated or slotted with tially upon the line 2-2 upon Fig. 1;
small perforations or slots which permit the oil
Fig. 3 is a view in side elevation of one of the 10
10 to enter but which are designed to keep out sand outer wire bristles of the improved perforation
and portions of the formation. It frequently
and
occurs, however, that these perforations or slots cleaner;
Fig. 4 is a similar view to Fig. 3, illustrating
become clogged with the result that ingress to
of the inner wire bristles.
the liner is materially retarded. It has been one
Referring to the accompanying drawing where- 15
15 proposed to clean such perforations by means of in similar reference characters designate similar
a suitable wire brush.
However, difficulties are
experienced with the conventional form of wire
brush in that the wire bristles become perma
nently bent when the brush is being lowered into
20 the well. Consequently, when the bristles are
thus damaged when the brush reaches the per
forations in the liner it is not in a suitable con
dition to effectively clean the' perforations or
slots therein.
0
It is an object of the present invention to pro
vide a perforation cleaner having wire bristles
thereon which extend outwardly from the body
of the cleaner and which are characterized by
the fact that they are more readily bendable
adjacent the body than outwardly therefrom.
3 O Consequently, during the lowering of the cleaner
into the well, if the bristles encounter any ob
struction or engage .the walls of the casing, the
outwardly extending portions may bend bodily
35 with respect to the body of the perforation
cleaner without becoming permanently bent.
In this way, when the perforation cleaner reaches
the liner the bristles will be returned automati
4Q.
cally to their ‘initial positions so as to be effective
in cleaning the perforations or slots.
Another object of the invention is to provide
a perforation cleaner generally in the form of a
cylindrical wire brush and which is provided with
suitable centering means for. maintaining the
45 perforation cleaner centrally‘ of the liner while
the perforations or slots therein are being
cleaned.
Another object of the invention is to provide a
novel form of bristle construction for wire
brushes, perforation cleaners, and the like which
5 6 is of relatively simple construction and which
may be easily and quickly manufactured and
which is capable of being easily and quickly
mounted on the body of the perforation cleaner.
55 With the foregoing and ‘other objects in view,
parts throughout, the improved perforation
cleaner comprises a suitable body in preferably
formed of a section of heavy walled tubing or
pipe. At the bottom of the body there may 20
be a suitable bullnose ll suitably shaped to pre
vent the construction from becoming caught or
hung in the casing or liner as it is being lowered
into the well. The top of the body is provided
with a suitable wrench square I2 and a threaded 25
pin l3 by which it may be attached to a set of
jars (not shown) and to a sinker bar or one or
more sections of pipe (not shown) which will
supply the required weight to force the construc- .
tion downwardly into the liner. Adjacent the 30
top and bottom of the body there are a plurality
of outwardly bowed springs l4 constituting cen
tering springs designed to engage with the in
terior surface of the liner to hold the body if]
centrally thereof during the cleaning operations; 35
Body i0 is equipped with a multiplicity of out
wardly extending radial wire bristles l5. In the
perferred form of construction these bristles are
arranged in helical rows extending around the
body as shown, although any other preferred 40
arrangement may be adopted.
In the preferred form of construction each
bristle is made of inner and outer wires, the
outer wire beingillustrated in Fig. 3 and the
inner wire being illustrated in Fig. 4. The outer 45
wire l6 has a radial portion l1 at the base of
which there are several coil-like convolutions l8
forming a type of coil spring at the base. The»
end of the wire -,I 9 is bent laterally from the lower
most convolution forming a suitable tail. The 50
inner wire generally designated at 20 is similarly
constructed with the exception that its coil-like
convolutions 2| are formed on a smaller diameter
than the convolutions l8. This" enables the con
volutions 2| to be teiescoped inside of convolu- 55
2.»
2,151,416
tihtist‘ls' with the result that the completed
521bristle comprises radially extending portions l1
what in excess of the interior diameter of the
and-'22.;on the two wires,v each radial portion‘ liner, the radial portions of‘ the bristles at the
beingiiconnected at its base to several coil-like
convolutions which, in turn, are connected to the
laterally extending tails l9 and 23. When the
two wires are assembled or nested together they,
have their spring-like coils disposed in-recesses, 24
drilled into the exterior surface of body in. The
laterally extending tails extend laterally through
the body in small drilled holes 25 and are secured
therein by means of threaded plugs 25.
The operation and advantages of the improved
ends of the reciprocating strokes enter the per
forations or slots in the liner and
poke outwardly any clogging material thus clean
ing the perforations.
Various changes may be made in the details
of construction without departing from the spirit
or scope of the invention as defined by the ap
pended claims.
'
We claim:
1. A perforation cleaner comprising a body
perforation cleaner are as follows: As the device . having a plurality of outwardly extending wire
bristles secured thereto, said bristles having a
is being lowered into the well, if the radial ex
tending portions l1 and 22 of the bristles should plurality of convolutions formed therein adjacent
encounter some obstruction or should engage ‘the body arranged in planes transverse to the
lengths of the bristles rendering the bristles
the walls of the casing or of the liner, the ra
more readily bendable adjacent the body than
dially extending portions will not bend nor be
outwardly therefrom. ’
come permanently bent from their radial posi
2. A perforation cleaner comprising a body,
tions. Instead, the radial portions will remain
straight, all bending taking place in the coils l8 there being recesses formed in the exterior sur
face of the body, and wire bristles, each having
and M. In ‘other words, should the radial por
coil-like convolutions disposed in the recesses,
tions l1 and 22 encounter some obstruction tend
25 ing to bend them upwardly, these radial portions the axes of the convolutions being substantially
will be bent bodily in an upward direction with parallel to the lengths of the bristles, thereby 25
rendering the bristles more readily bendable ad
most of the bending taking place in the spring
jacent the body than outwardly therefrom.
like coils l8 and 2|.
3. A perforation vcleaner comprising a. body,
When the bristles pass the obstruction or are
released,» the eifect of the spring-like coils is to there being recesses formed in the exterior sur
instantly return the radially extending portions face of the body, and wire bristles, each having 30
to their initial radial positions. In this way,.the coil-like convolutions disposed in the recesses,
outwardly extending portions of the bristles will
be maintained in proper condition at the time
that the level of the perforations or slots in the
liner is reached. When the perforated portion
of the liner is reached the perforations are
cleaned by merely reciprocating the perforation
cleaner up and down in- the liner.
The cus
40 tomary practice is to start at the bottom of
the liner and during the reciprocation gradually
work upwardly.‘ After the liner has been cleaned,
the perforation cleaner is bodily withdrawn.
In use of the present type of construction,‘we
have found that we have been able to increase
the production of oil wells having badly clogged
perforations in their liners, from between 25 and
50%.
'
It is not essential that each bristle be made
50 up of two wires having their coils nested one
within the other. If desired, each bristle may
wire having its coil recessed
in the body. We prefer to employ the double
. be made of a single
wire construction for the reason that the radi
55
ally extending portions I1 and 22 being posi
tioned side by side, mutually contribute to each
other’s stiffness. At the same‘ time each of the
radial portions is more readily bendable in the
spring-like coils in the recesses in the body I0.
60 It will‘ be noted that the convolutions of the coils
are arranged in planes transverse with respect to
the radially or outwardly extending portions of
the bristles so that the axes of the convolutions
are approximately parallel to their respective ra
65 dial or bristle portions.
During the cleaning operation when the per
rendering the bristles more readily bendable ad
jacent the body than outwardly therefrom, each
bristle having a tail and means for securing the 35
tails in the body.
4. A bristle for perforation cleaners and the i
‘like, comprising a section of wire having an out
wardly extending portion and having at its in
ner end a number of coil-like convolutions, the 40
axes of the convolutions being approximately
parallel to the length of the outwardly extending
portion.
5. A bristle for perforation cleaners and the
like, comprising a section of wire having an out-,
wardly extending portion and having at its inner
end a number of coil-like convolutions and a lat~
erally extending tail, the axes of the convolutions
being approximately parallel to the length of
I
til
the outwardly extending portion.
6. A bristle for perforation cleaners and the
like, comprising two sections of wire, each of
which has an outwardly extending portion and
each of which has adjacent its inner end a plu
rality of coil-like convolutions, the coil-like con 55
volutions of one wire being disposed within the»
coil-like convolutions of the other wire.
7. A bristle for perforation cleaners and’ the
like, comprising two sections of wire, each of
which has an outwardly extending portion and 60
each of which has adjacent its inner end a plu
rality of coil-like convolutions, the coil-like con
volutions of one wire being disposed within the
coil-like convolutions of the other wire, each
foration cleaner is reciprocated, the overall di- ' wire having a laterally extending tail.
ameter of the perforation cleaner being some
45
'
JULIAN P. BLACK.
HOWARD C. STROEBEL.
65
Документ
Категория
Без категории
Просмотров
0
Размер файла
348 Кб
Теги
1/--страниц
Пожаловаться на содержимое документа