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Патент USA US2122863

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July 5, 1938.
‘
J. H. HOWARD El‘ AL
2,122,863
REAMER
Filed April 15, 1936
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July 5, 1933-
J. H. HOWARD El" AL
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2,122,863
REAMER
Filed April 13, 1936
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Patented July‘s, 193s
' 2,122,863
UNITED T'STATES PATENT- OFFiCEZ
REAMEE
John H. Howard, Huntington’ Park, and Alfred
G. Catland, Alhambra, Calif; said Oatland as
signor to Globe Oil Tools Company, Los Nietos,
OaiiL, a corporation of California
Application April 13, 1936, Serial No. ‘74,186
10 Claim. (Cl. 255-73)
This invention relates to a well drilling tool
and relates more particularly to a well reamer.
Fig. l is a side elevation of the improved tool
provided by this invention. Fig. 2 is an enlarged
A general object of the invention is to provide a ' longitudinal detailed sectional view of the reamer
practical, eifective well reamer for reaming or portion of the tool, being a view taken substan
enlarging a pilot bore and for forming a smooth tially as indicated by line 2-2 on Fig. 5. Fig.
regular seat on the wall of the well to receive 3 is an enlarged transverse detailed sectional
the packer of a formation tester, or the like.
view taken as indicated by line 3-3 on Fig. 1.
Many formation testers or well testers embody Fig. 4 is an enlarged transverse detailed sectional
a packer designed to seal with an inclined view taken as indicated by line 4-4 on Fig; 1.
10 shoulder of earth formation in the well. Here
Figs. 5 and 6 are transverse detailed sectional
tofore it has been the general practice to employ views taken as indicated by lines 5--5and 6-6,
a drag or scrape type tool to form the inclined respectively, on Fig.‘ 2, and Fig. 7 is an enlarged
shoulder in a well to receive the packer of a . fragmentary detailed sectional view taken as in
tester. Drag type or scrape type drilling tools are dicatedby’line 1-4 on Fig. 2.
15 not capable of forming a smooth regular shoul
The well tool'provided by this invention inder for engagement by a packer. .
cludes, generally, a shank lo, a bit II on the
Another object of this invention is to provide lower end of the shank, removable inclined pins
a. well tool of the reamer type embodying roller
l2 and i2“ on the shank I0 above the bit ll,
cutters positioned and mounted to form a smooth means [3 locking the pins I2 and i2a in place,
20 regular inclined shoulder on the wall of the well and roller cutters A and B rotatable on the pins
for properly receiving the packer of a well tester I2‘ and i2“ respectively.
or the like.
The shank i0 is the mandrel or body of the
Another object of this invention is to provide tool and is adapted to be secured to the lower
a well reamer embodying roller' cutters and that end of a well drilling string. The shank ID is
25 is operable to enlarge a rat-hole or pilot bore to an elongate member and is provided at its upper
the desired full gauge.
‘
'
end with means for connecting with the drilling
Another object of this invention is to provide string. In the case illustrated in the drawings
a well drilling tool embodying a pilot bit oper
a tapered screw threaded pin I4 is provided on
able to guide the tool in a previously formed pilot the upper end of the shank Ill for connecting the
30 bore or to drill a pilot bore and that embodies shank with the drilling string. The shank Ill
reaming roller cutters rotatable about inclined is provided with a downwardly and inwardly
axes operable to enlarge the pilot bore to the de
tapered portion IS. The tapered portion I 5 is
sired gauge.
spaced some distance above the lower end of the
‘Another object of this invention is to provide shank ‘ l 0. An annular rim or ?ange I6 is provided
as novel and particularly effective means for rotat
at the upper end of the portion i5 and a similar
ably supporting the roller cutters of a well ?ange ll of less diameter is provided at the lower
endof the portion IS. The lower portion of
reamer.
Another object of this’ invention is to provide the shank l0 below the ?ange i1 is reduced in
a well reamer embodying a simple one diameter diameter and may be graduated in diameter. as
40 pin rotatably supporting the roller cutters and a illustrated. A central longitudinal ?uid passage
simple dependable means for locking the pin 9 extends longitudinally through the shank Ill
against movement and displacement.
'
Another object of this invention is to provide a
well reamer of the character mentioned in which
45 the cutter carrying pins are supported at their
ends and at points between their ends.
A further object of this invention is to provide
a well reamer that is very simple and inexpensive
'50
I.
10
1'
20
25
30
35
40
from one end to the other.
and that is easy to recondition after use.
In accordance with‘ the invention the shank I0
is shaped or formed to carry the pins i2 and i2.1
and the cutters A ‘and ‘B. Circumferentially 45
spaced sets or series of recesses-i8 and is are
provided in the tapered portion iii of the shank
i0. In the preferred construction there are three
equally spaced series of recesses. ‘At least one
The various objects and features of our in
vention will be fully understood from the follow
ing detailed description of a typical preferred
form and application of the invention, through
out which description reference is made to the
and at least one of the series has three vertically
spaced recesses iii. In the preferred form of the
invention illustrated in the drawings there are
two vertically spaced recesses iii in two of the
55 accompanying drawings, in which:
of the series has two vertically spaced recesses I8 50. '
series and three vertically spaced recesses iii in 55 v
2
2,122,868
the third series or recesses. The¥upper ends of
Sockets 29 are provided in the shank ?ange II at
the uppermost recesses I8 and I9 occur at the the lower ends of the lowermost recesses I8. The
?ange I6. The lower ends of the lowermost re- . longitudinal axes of the sockets 29 are inclined
downwardly and inwardly and the lower ends of
cesses I8 and I9'occur at the ?ange II‘. The re
cesses I8 are of the same length and adjacent ‘the sockets 29 are closed. Openings 39 extend
recesses I8 are separated by partitions .or webs through the ?ange I6 at the upper ends of the
29. The webs 29 are integral parts‘oi the shank uppermost recesses I8. The openings 39 are in
l9. The recesses I9 0! the third series of recesses clined downwardly and inwardly and are longi
may be of substantially the same size and are tudinally aligned with the sockets 29. Partially
10 separated or spaced by integral webs 2I of the cylindrical ‘grooves 3I are provided in the webs
shank I9. In accordance with the invention the 29. The axes of curvature of the walls of the
'inner walls of the recesses I8 and I9 are inclined grooves 3| are coincident with the axes of the
downwardly. and inwardly relative to the longi
sockets 29 and openings 39. The pins I2 are
..tudinal.axis of the shank I9. Portions of the passed ‘downwardly through the openings 39 to
15 walls of the lowermost recesses I8 and I9 may be have their lower end portions received in the 15
substantially vertical. In the preferred construc
sockets 29. The-bottoms oi the sockets 29 may
tion the inner walls of the other recesses I8 and limit'the downward movement of the pins I2.
I9 are curved about downwardly and inwardly The pins I2 bear in or cooperate with the grooves
inclined axes oi! curvature. The upper and lower 3I and are thus supported against inward pres— '
20 walls of the recesses I8 and I9 are?at and may Y sures between their ends. The upper ends of the 20
be normal to the axes of curvature of the pins I2 are preferably within the openings 39.
inner walls of the recesses. The recesses I8 and
A socket 32 is provided in the ?ange II at the
I9 are related so that the middle or intermediate
lower end of the lower recess I8. The socket 32
recess I9 lies in a horizontal plane or zone over-.
25 lapping the adjacent end portions of the upper
_ and lower recesses I8. Ports 8 are provided in
so
the shank I9 to conduct the circulation ?uid from
the passage 9 to the recesses I8 and I9. There’
may be a port 8 communicating with each recess
I8 and I9 to assure the proper ?ushing of the
cutters A and B. If desired the ?uid passage 9
may be of downwardly diminishing diameter as
illustrated in Fig. 2.
-
The bit I I may be employed to drill a pilot bore
35 in advance of the reaming cutters A and B or may
be employed to operate in a previously formed
pilot bore to guide the tool. In accordance with
the broader aspects of the invention the bit ll
may be varied considerably in character and may
40 be secured to the shank I9 in any suitable man
ner. The particular bit II ‘illustrated in the
drawings is a drag type or scrape type bit com
prising a stem 22 and cutting blades 23 project
ing from the lower end of the stem 22. In the
drawings we have shown the bit I I secured to the
shank I9 by a practical e?ective bayonet type
connection, it being understood that the bit II
may be threaded to the shank if desired. In the
structure illustrated in the drawings a longi
tudinal socket 24 is provided in the stem 22 to
receive the reduced lower portion I9“ of the
L-shaped slots or bayonet slots 25 are
- shank I9.
provided in the stem 22 to receive lugs 26 on the
shank portion I9“. The lugs 26 are adapted to
55 cooperate with the lateral portions of the bayonet
slots 25 to connect the bit II to the shank I9.
Keys 21 are inserted in the longitudinal or verti
cal portions of the slots 25 behind the lugs 26 to
lock the lugs in the lateral portions of the slots.
‘Screws 28 are threaded in the shank to hold the
keys 2'I'against upward displacement. The bit
II has one or more ?uid discharge ports (not
shown) for discharging the circulation ?uid de-'
livered to the bit by the ?uid passage 9.
The pins I2 and I2a are provided to rotatably
carry the cutters A and ,B and are removably se
cured to the shank I9 to extend through the
series of recesses I8 and I9. There is a pin I2
extending through each series or set of recesses
70 I8 and a pin I2‘ extending through the series of
recesses I9. The pins I2 and I2‘1 are plain cylin
drical members of the desired diameter. In ac
cordance with the invention the cutter carrying
pins I2 are inclined downwardly and inwardly
relative to the longitudinal axis of the shank I9.
Yrs
is inclined downwardly and inwardly relative to
the longitudinal axis of the shank. An opening 25
33 is provided in the flange I6 at the upper end
of the upper recess I9. The opening 33 is in
clined downwardly and inwardly and is in longi
tudinal alignment with the socket 32. Partially
cylindrical grooves 34 are provided in the webs 2 I. 30
The axes of curvature of the walls or grooves 34
are coincident with the axis of the socket 32 and
the opening 33. The pin I2“ is passed down
wardly through the opening 33 to have its lower
portion received in the socket 32. The upper 35
end of the pin I2“ is preferably within the open
ing 33. The pin I2a extending through the re
cesses I9, cooperates with the grooves 34 to be
supported against inward thrusts at spaced points
between its ends. It will be observed that the
pins I2 and I2“ arranged as just described are
held against movement in all directions except
about their own axes and upward movement.
The means I3 operates to lock or hold the pins
I2 and I2a against upward movement and against 45
turning about their axes whereby the pins are
held against displacement from the shank I9.
The pin retaining means I3 includes a block 36
secured to each web 29. The webs 29 each have
a ?at sided key 3‘I and a ?at walled slot or groove
38 is provided in the inner side of each block 36
to receive a key 3‘I. The cooperation of the keys
3‘I and the grooves 38 holds the blocks 36 against
lateral movement. A ?at walled slot 39 is pro
vided in the inner side of each block 36 to co .55
operate with a pin I2. In accordance with the
invention the pins I 2 each have a ?at walled notch
49 for cooperating with a slot 39. The coopera
tion of the walls of the'slots 39 and the notches
49 holds‘ the pins I2 against rotation. The upper
and lower ends of the blocks 36 cooperate with
the end walls of the notches 49 to hold the pins
I2 against longitudinal movement, It is to be
understood that the lower ends of the pins I2
may cooperate with the bottom walls of the
sockets 39 to prevent downward movement of the
pins. Means is provided for removably securing
the blocks 36 to the shank I9. Screws M are
passed through openings 42 in the blocks 36 and
are threaded into openings 43 in the webs 29 and 79
the adjacent parts of the shank I9. In practice
the screws 4I may be socket headed and their
heads may be received in the enlarged outer por
tions of the openings 42. The heads oi.’ the
screws 4| may be peened over in the openings 42 25
9,129,868 ‘
3
to hold the pins against displacement. It is be
lieved that it will be apparent how the coopera
tion 01’ the slots 38 in the blocks II with the pin
notches 40 effectively and dependably holds. the
pins against movement and displacement.
ters B. The thrust washers 85 in the upper
end of the uppermost cutter B has nonrotatable
cooperation with a ?at walled notch 86 in the
The pin retaining means l3 includes blocks 44
secured to the webs 2i. Flat sided keys 4' are
provided on the webs 2i and cooperate with
grooves 46 in the blocks 44 to hold the blocks
10 against lateral shifting. In accordance with the
invention ?at walled slots 41 are provided in the
blocks 44 and ?at walled notches 48 are provided
in the pin i2‘ to cooperate‘with the slots 41. The
engagement of the walls of the slots 41 and
most cutter B is held against turning by its
cooperation with a ?at walled notch 61 in the
15 notches 48 holds the pin I2‘ against rotational
movement. The ends of the blocks 44 are adapt
ed to cooperate with the end walls of the notches
48 to hold the pin l2! against longitudinal move
ment. Suitable means is provided for removably
securing the blocks 44 to the webs 2 I. In the par
ticular case illustrated screws . 48 are passed
through openings 50 in the blocks 2| and thread
into openings 5| in the webs 2| and the adjacent
35
70
75
thrust washer 65 at the lower end of the lower
bottom wall of the recess is. The thrust wash
ers 8i spacing the ends of the cutters B from
the webs 2| ,and the blocks 44 are partially re 10.
ceived in ?at walled notches B8 in the blocks
44. The ?at sided washers 85 seated in the ?at
walled notches 68 are held against turning on
the pin l2.
In operation, the tool provided by the pres
ent invention may be employed to form or ?nish
an inclined shoulder of earth formation at the
upper end or a rat-hole or pilot bore. When
used for this purpose the bit ll enters the pilot
bore to guide and steady the tool. The cutters
A and B are adapted to engage the formation
at the upper end of the pilot bore to cut or
provide a smooth regular inclined shoulder. The
parts of the shank iii. The screws 49 may be 1, cutters A and B are related so that no ‘ridges
The heads of the screws or grooves are formed on the shoulder. The
49 may be received in the enlarged outer ends of intermediate cutter B operates in a horizontal
the openings 50. The heads of the screws 49 may or circumferential plane which overlaps the ad
be peened over in the openings 50 to prevent loss jacent end portions of the cutters A. The plu
or unthreading of the screws 49. The blocks 44 rality of roller cutters independently rotatable
cooperate with the pin l2a to prevent rotational about inclined axes are particularly e?ective in
forming a smooth regular shoulder in the well.
and longitudinal shifting of the pin and to main
tain the pin in bearing cooperation with the The tool may be employed to- ream or enlarge
a'previously formed pilot‘ bore. When used for
grooves 34.
‘
The roller cutters A are rotatable on the pins this purpose the bit ll enters the pilot bore in
l2 to project from the mouths of the recesses I 8 advance of the‘cutters .A and B to guide and
while the roller cutters B are rotatable on the pin steady the tool. The cutters A and B act on
I2“l in the recesses IS. The cutters A and B are the earth formation at the upper end of the
in the nature of substantially cylindrical roller pilot bore and as the tool is rotated and fed
cutters. The upper portions of the uppermost downwardly they operate to enlarge the bore.
cutters A and B ‘may be tapered. The lower end The cutters A and B are spaced and positioned
portions of the lower cutters A and B may be to be particularly rapid and efficient in their
cutting action. If desired, the tool may be em
tapered as illustrated in the drawings. The cut
ters A and B have suitable clearance with the ployed as a drilling tool, in which case the bit
walls of their respective recesses l8 and i9 and Ii operates to form a pilot bore in advance of
‘the cutters A and B. As the bit N forms the
project from the mouths of the recesses to co
operate with the earth formation. The cutters pilot bore the cutters A and B operating above
A and B have suitable teeth or cutting parts. In the bit enlarge the pilot bore to the desired
the particular form of the invention illustrated diameter.
The cutters A and B are effectively and de
the cutting teeth of the cutters B are spiralled in
a left hand direction and the cutting teeth of the pendably supported for rotation about their in
cutters A in one series of recesses l8 are spiralled dividual axes. The cutter supporting pins 12
in a right hand direction. The cutting teeth of ' and l2a are simple cylindrical parts whose op
the cutters A in the other series of recesses i8 posite end portions are directly carried in open
are straight or axial. This relationship of the ings in the shank Ill. The pins l2 and I2‘3 are
supported intermediate their ends against the
cutting parts of the cutters A and B is best illus
operating thrusts. The webs 20 and 2| serve to
trated in Fig. 1 of the drawings.
Thrust washers 60 are provided on the pins .brace and support the intermediate portions of
l2 at the opposite ends‘ of the cutters A. The the pins l2 and I23 respectively. As described
washers‘ 6|! are polygonal or ?at sided. The above. the slotted blocks 36 and 44 cooperate
washers 60 at the upper ends of the uppermost with the pins l2 and i2u at the webs 20 and II
cutters A cooperate with ?at walled notches 6! to dependably lock the pins against movement.
in the upper walls of the upper recesses I8. The The blocks 36 and 44 are simple inexpensive
cooperation of the washers 60 with the notches parts and are easily secured to the shank. The
blocks may be readily removed from the shank
6i prevents turning of the washers. The wash
ers 60 at the lower ends of the lower cutters A III to permit the removal of the pins I2 and i2a
when it is desired to replace the cutters.
cooperate with ?at walled notches 62 in the bot
Having described only a typical preferred form
tom walls of the lower recesses l8. The ?at
sided washers 60 ?tting the'?at walled notches and application of our invention, we do not wish
62 are held against turning. The washers 60 to. be limited or restricted to the speci?c details
which space the ends of the cutters A from the herein set forth, but wish to reserve to our
webs 20>cooperate with ?at walled notches 63 selves any variations or modi?cations that may
in the blocks 36. The notches 63 receiving the appear to those skilled in the art or fall within
flat sided washers 60 holdthe washers against the scope of the following claims:
Having described our invention, we claim:
turning. Thrust washers 65 are provided on the
1. A well tool comprising. a shank having re 76
pin l2a at the opposite ends of the several cut
25 socket headed screws.
30
upper wall of the uppermost recess I8. ‘ The
4
2,122,868
cesses, a socket at an end of one recess and an
opening at an end of another recess, a web on
the shank between the recesses, a pin extend
ing through the recesses, cooperating with the
web, having one end portion carried in the
socket and having its other end portion carried
in the opening, and a part on the web cooper
' ating with the pin to hold the pin against lon
gitudinal movement, and cutters‘ in the recesses
10 rotatably supported by the pin.
2. A well tool including, a shank having a series
of aligned spaced recesses, and openings at the
opposite ends of said series, a pin extending
through the recesses and having its portions car
15 ried in said openings, a part secured to the por
tion of the shank between the recesses to hold the
pin against turning movement, and cutters on the
pin rotatable in the recesses.
3. A well tool including, a shank having a series
of recesses and an opening at each end of said
series, a part on the shank between the recesses,
a removable pin extending through the recesses
and having its end portions supported in the
openings and supported between its ends by said
part, means on said part holding the pin against
turning and moving longitudinally, and cutters
in the recesses rotatably supported by the pin.
4. A well tool including, a shank having a
series of recesses and an opening at each end of
said series, a part on the shank between the re
cesses, a removable pin extending through the
recesses and having its end portions supported in
the openings and supported between its ends by
said part, means on said part holding the pin
35 against longitudinal movement, and cutters in
the recesses rotatably supported by the pin, said
said part. the pin having a notch, a member at
tached to said part and cooperating with the
notch to hold the pin against movement, and
cutters rotatably carried by the pin to project
from the recesses.
-
7. A well reamer comprising, a shank having a
series of recesses, an opening at one end of the
series and a socket at the other end of the series,
a part on the shank between the recesses,.a pin
extending through the recesses'having one end
portion carried in the opening, having its other
end. portion carried in the socket and bearing
against said part, the pin having a notch, a mem
ber removably, secured to said part and coop
erating with the notch to lock the pin in posi 15
tion, and roller cutters rotatable on the pin and
projecting from the recesses.
8. A well reamer including, a shank, three cir- '
cumferentially spaced pins on the shank in
clined downwardly and inwardly relative to the 20
longitudinal axis of the shank, three roller cut
ters on one of the pins, and two roller cutters on
each of the other pins of greater length than the
?rst mentioned cutters, the cutters on the said
pins being related to overlap in their engagement
with the formation.
9. A well reamer comprising, a shank having a
series of vertically spaced recesses, a socket at
the, lower end of said series and an opening at the
upper end of said series, said socket and open
ing being inclined downwardly and inwardly
relative to the longitudinal axis of the shank, a
pin extending through the recesses and having
one end carried in the socket and one end car
ried in the opening, a member secured to the 35
shank between the recesses and cooperating with
means including a block secured to said part and
cooperating with the pin.
the pin to hold it against longitudinal movement,
5. A well tool including, a shank having a series
of recesses and an opening at each end of said
pm.
series, a part on the shank between the recesses,
a removable pin extending through the recesses
and having its end portions supported in the
circumferentially spaced series of vertically
openings and supported between its ends by said
part, a substantially ?at surface on the pin, a
member secured to said part and cooperating
with the surface to hold the pin against move
ment, and cutters rotatably carried by the pin
and roller cutters in the recesses rotatable on the
' :
10. A well tool comprising, a shank having 40
spaced recesses, sockets at the lower ends of said
series, and openings at the upper ends of said
series, the sockets and openings being inclined
downwardly and inwardly relative to the longi 45
tudinal axis of the shank, pins passing through
the recesses and bearing on the portions of the
shank between adjacent recesses, and having
to project from the recesses.
6. A well tool including, a shank having a
series of recesses and an opening at each end of
their ends carried in the sockets and openings,
blocks secured to said portions of the shank and
said series, a part on the shank between the re
ters in the recesses rotatable on'the pins.
cesses, a removable pin extending through the
recesses and having its end portions supported in
the openings and supported between its ends by
holding the pins against turning, and roller cut
JOHN H. HOWARD.
ALFRED C. CATLAND.
50'
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