close

Вход

Забыли?

вход по аккаунту

?

Патент USA US3095062

код для вставки
June 25, 1963
3,095,052
J. G. JACKSON
REVERSE CIRCULATION SUB
Filed July 13, 1959
E
a
Z9
J0 HN 60H00” .MC/60A(
INVENTOR.
WHA/VN a ‘Mc MAN/GAL
United States Patent
1
3,095,052
REVERSE CIRCULATIGN SUB
John Gordon Jackson, Denver, Colo., assigner to Gas
O” ICC
3,395,052
Patented June _25, v1963 _
2
_sides of Iwhich are operably mounted the cones or cut
ters 14.
At its upper end, the body 11 is provided with means
for connecting the bit to the adjacent end of Áa drill string
Drilling Services Co., Los Angeles, Calif., a co-partner
or the like.
slnp
box or other means, one such other means being shown
Any suitable means may be used, such as a _
Filed July 13, 1959, Ser. No. 826,683
4 Claims. (Cl. 175-324)
This invention 'relates generally to well drilling equip
and comprises a hollow, externally threaded pin 1‘5 thread
ment and relates vmore particularly to reverse circulation
tools or apparatus.
sageZt) Íwhich extends longitudinally through the sub v1-8.
ably disposed within the internally threaded box 16 at `
the lower end of a vtubular sub »18. The interior 19 of
the pin is of substantially the same diameter as the pas
The head 11 is provided with an axial bore 21 there
While the invention has particular utility in drilling
through which is of substantially smaller diameter than
equipment utilizing reverse circulation of air or other
the diameter of the interior 19 of the pin` 15. A tube 22
gaseous fluid or a mist of gaseous fluid and liquid, and is
15 is secured in the opening or bore 21 of the head 11 by
shown and described in such connection, it is to be under
-rneansof welding 23 or other suitable means and said
stood that its utility is not confined thereto.
tube extends from the lower side of the body 1-1 upwardly _
It is an object of the present invention to provide a
a substantial distance above the upper end of the pin Y1.5
reverse circulation sub adapted to eliminate plugging,
so Athat there is an upper portion of said tube that ex
bridging or sticking of the bit by the cuttings.
20 tends upwardly in the lower end portion of the sub ‘18. _
Another object of the invention is to provide a device
Below the upper end of the tube 22 and inwardly of `
of this character whereby quantities of fluids are removed
the box 16 there are a plurality of ‘annular-ly spaced open
from the bit thus allowing more air to circulate around
ings 25 in the wall of the sub 18, said openings being
said bit land effect faster drilling.
inclined upwardly and inwardly.
_
A further object of the invention is to provide a device 25 The upper end of the sub P18 is provided with a pin,
of this character having pickup passages for fluids, liquid
not shown, which is screwed into a box in the lower end _
of the adjacent pipe section 26 of -t-he drill string which
extends upwardly to the surface land is connected to the
or gas or a mixture of both.
A still further object of the invention is to provide a
device of this character that is extremely etlicient in
usual operating equipment -for effecting rotation of the
picking up the cuttings and the like to be carried to the 30
drill or bit.
top of the well for disposal.
-As reverse circulation is used, gaseous fluid under rela
Another object of the invention is to provide a device
tively high pressure is forced downwardly between the
of this character which, when used in high angle direc
drill string and the wall 2S of the well, as indicated by
tional drilled wells will cause the sand and/ or cuttings to
the arrows 2.9 in FIGS. l and 2. The gaseous fluid travels
be »rotated so that such material cannot f-all out by 35 to the -lower end of the well where the cutting is taking _
gravity.
place and flows over the cutters and through the spaces
It has been found that a mixture of air-water mist and
thereabout-and into the lower end of the tube 22 as iu
lime serves as »a highly effective fluid for use during
dicated by the arrows 30 :and 32 respectively.
drilling operations. The water acts `as -a lubricant and
As the tube 22 is of «relatively small diameter, the
the lime is a corrosion inhibitor.
40 velocity of the gas passing therethrough will be substan
Still another object of the invention is to provide a
tially increased over the velocity thereof coming down
the =annulus between the drill string and the well wall and,
device of this character which lowers the pressure on the
formation.
hence, there is «a more elîective picking up of the cuttings
Still another object of the invention is to provide a
device of this character which tends to keep the side
walls and the bit clean.
A still further object of the invention is -to provide a
device of this character wherein standard circulation may
be used for certain purposes, such as, for example, liner
cleaning.
by this high velocity flow. Also, substantially larger cut
tings will be entrained in the gaseous lluidand carried up
wardly through the tube 22 from the upper end _of which
itis discharged into 'he passage 20 of the sub 18 and
thence carried upwardly through the interior of the drill
string.
50
i
At the same time, gas ¿from the annul-us between the
Another object of the invention is to provide a device
of this character that is relatively simple and sturdy in
construction, «and effective and reliable in operation.
The characteristics and advantages of the invention
drill string 'and the well wall will also dow yinto the inte
rior 20 of the sub »through the openings or ports 25.
This ñow will be at a relatively high velocity and the gas
will pass upwardly in the iannulus 34 between the exterior
are further sufficiently referred to in connection with the 55 of the tube 22 and the wall of the passage 20. As the
following detailed description of the accompanying draw
gas from the passages or ports 25 passes the upper end
ings which represent one embodiment. After considering
of the tube 22, it creates a suction effect which serves to
this example, skilled persons will understand that varia
increase the elîective flow of the gas and its capacity to
tions may be m-ade without ldeparting from the principles
carry the cuttings upwardly.
string sections is of
disclosed, and l contemplate the employment of any 60 -Since the interior of the
smaller effective size than the annulus between the exte
structures, arrangements, modes of operation `or methods
rior of lthe drill string and the well wall, 4the velocity of
that are properly within the scope of the appended claims.
the gaseous fluid flowing upwardly through the drill string
Referring to the drawings, which are for illustrative
D is substantially greater than the velocity of said ñuid llow
Gl ing down the tannulus between the string and well 'wall so
FIG, 1 is a side view of drilling apparatus embodying
that the cuttings are effectively carried upwardly to the
the invention and disposed in a well;
surface for disposition.
FIG. 2 is an enlarged longitudinal section thereof; and
It has been Kfound that with this arrangement, the bit
FIG. 3 is a sectional view -taken on line 3_3 of FIG. 2.
is kept clean so that there is no plugging or bridging
Referring more particularly to the drawings, there is 70
thereof, an effect due to the suction at the upper end of
shown a rotary drilling bit, indicated generally at 10
the tube 22. The pressure on the formation may be
comprising a body 11 with depending arms to the inner
purposes only:
i
3
3,095,052
lower with this arrangement and iluids are removed from
the bit so as to allow more air to pass thereover and
hence, permit ‘faster drilling.
While air and/or other gaseous ñuid may be used as
a drilling liuid, it has been ffound that a mixture of air
water mist and lime is very effective. The Water acts as
a lubricant and the lime corrosion inhibitor.
Relative to the use of water mist or air-foam in drill
ing operations, water, either plain or containing a foam
ends thereof spaced downwardly of the upper end of
said tube, »gaseous fluid passing downwardly in the well
at the outer sides of the sub ñowing upwardly through
the tube Iand also through the -openings in the sub and
passing upwardly about the tube to elîect reduced pres
sure at the upper'end of said tube.
2. In »apparatus for drilling wells «and the like: a rotary
. bit including a head with an .axial
opening therethrough;
an externally threaded pin extending upwardly from the
ing agent, is injected into the air stream in lrather large 10 upper end of said head and having an upwardly opening
amounts. This water travels down Ithe annulus between
recess therein; 4an upwardly extending tube having a
»the 'well wall and the exterior of the drill string and so
lower end portion secured in the opening in the bit head
dilutes the cuttings that balling -action does not take place.
and projecting upwardly of the upper end of the pin,
The -foam water mist then carries the cuttings «to the
the external diameter of said tube being substantially
surface together with any water produced from the for 15 less than that of the recess in the pin; a tubular mem
mations which are being drilled. In mist drilling the air
ber of substantially uniform external diameter through~
is more than just saturated with Water. The conditions
out yits length Iand having ran internally threaded box
are more like that found in a driving rainstorm or the
at the lower end in which said pin is threadably received,
spray -from a high pressure nozzle.
the passage through said member being of substantially
The purpose of putting lime into an air-water mixture 20 the same diameter as the diameter of said recess, said
is to prevent so-called oxygen corrosion of the drill string
member having a plurality of «annularly spaced openings
or drill pipe.
`
in the wa-ll thereof inwardly of the box and inclined
While only one port or passage through the 'bit or body
inwardly and upwardly, the inner ends of said openings
is shown, it is to be understood :that there may be a plu
'being spaced downwardly of the upper end of said tube,
rality of Isuch por-ts connected to a jet tube such as the
gaseous iluid passing downwardly in the well at the outer
tube 22. The important Áfactor is the suction applied to
sides of the member ilowing upwardly through the tube
the bottom of the bit caused by the ñow of >a portion of
and »also through the openings in the member ‘and pass
:the liuid into the sub and past the upper, open end of the
ing upwardly about the tube.
tube 22.
‘Put another way, the total amount of the drill
3. `In apparatus lfor drilling wells and the like: a rotary
ing ñuid is divided up, some passing about and through 30 bit including a head with a longitudinal opening there
the fbit parts and some entering the sub to create suction
through; «an upwardly extending tube secured in the
which will be elïective at the lower end of the bit -to
opening in the bit head and projecting upwardly thereof;
increase the rate or speed of ñow and'upward through the
van elongated member secured to said bit, said member
drill string.
I
having a passage therethrough of substantially greater
r[The tool may -be used `to clean a liner or` perforation
diameter than the externa-l 4diameter of the tube, said
and when thus used there is a simple jetting action out
tube being disposed .in said passage and defining, with
of the ports 25, standard circulation then being used.
the inner wall of the elongated member, an annular
The Ibit could vbe drilling the formation which has ñlled
space, said member having Ia substantially uniform con
into the liner and the jets blow out »against the perforation
figuration throughout its length and having a plurality
of the liner.
40 `of annularly spaced openings in the wall thereof inclined
Itis thought that the invention and many of its attend
inwardly »and upwardly »and discharging directly into .the
ant advantages will be understood from the Iforegoing
annular space of said tube; and means releasably con
description and it is believed that it will be apparent
necting the Ibit to the lower end of said elongated mem
ber.
that various changes may be made in the form, construc
tion, arrangement of the parts, and of the method of the 45
4. In apparatus for drilling wells and theV like with
gaseous-like drilling fluid: a rotary bit including a head
invention without departing from the spirit and scope
thereof or sacrificing all of its material advantages, the
` with »a longitudinal opening therethrough; connecting
means extending upwardly from the upper end of saidV
embodiment hereinbefore described being merely for pur
poses of illustration.
head; 4an upwardly extending tube secured in the open
50 ing in the bit head and projecting upwardly of said con
I claim:
'1. Apparatus for drilling wells and :the like, compris
necting means; and a tubular member of substantially
uniform diameter throughout its length and having a
part at the lower end connectible with said connecting
means, the passage through said member being of sub
stantially greater diameter than the external diameter of
the tube, thereby delining -a relatively large annular pas
ing: a rotary bit having a head with an axial opening
therethrough,` said head having depending arms, cutter
elements operably mounted on said arms, vand an exter
nally threaded pin extending upwardly from the upper
'endA of> said head and having an upwardly opening re
cess therein; an upwardly extending tube secured in the
sage between said tube `and the wall of the passage
Vthrough said member, said member having 'a plurality of
opening in the bit head and projecting upwardly of the
upper end of the pin, the external diameter of said tube
annularly spaced openings in the |wall thereof discharg
being substantially less than that 4of the recess in the 60 ing directly upwardly and inwardly about said tube.
pin; anda tubular sub adapted to be connected to the
References Cited in the ñle of this patent
lower end off a pipe string and having an internally
UNITED STATES PATENTS
threaded box at the lower end in which said pin is
threadably received, the extern-alV diameter of said sub
being substantially uniform throughout its length, the
65
passage through the sub being of substantiallyV the same
diameter ças -v the diameter of the recess of said pin, saidv
sub having a plurality of annularly spaced openings in
the wall thereof upwardly ofthe box and in the same
plane relative to each other, said tube extending up 70
wardly into the, passage of the sub and said openings
being inclined inwardly »and :upwardly with the inner
626,761
1,346,939
1,850,143
2,421,997
2,485,998
2,546,586
2,574,717
Leyner ______________ __ .lune '13,
Carmichael __________ __ July 20,
Schu-rmeyer _________ __ May 22,
C-rake _______________ __ lune 10,
Johnson _____________ __ Oct. 18,
Cross _______________ __ Mar. 27,
Stokes ______________ __ Nov. 13,
1899
1920
1932'
1947
1949V
1951
1951
2,729,426
Smith ________________ __ Jan. 3, 1956
2,849,213
Failing ______________ __ Aug. 26, 1958
Документ
Категория
Без категории
Просмотров
0
Размер файла
440 Кб
Теги
1/--страниц
Пожаловаться на содержимое документа