US1769371A

US1769371A - Rotary disk drill

Info

Publication number: US1769371A
Application number: US44774A
Authority: US
Inventors: William S Holdaway
Original assignee: Byron Jackson Co
Current assignee: Byron Jackson Co
Priority date: 1925-07-20
Filing date: 1925-07-20
Publication date: 1930-07-01
Anticipated expiration: 1947-07-01

Description

July 1, 1930. W.H OLDAWAY ROTARY DISK DRILL Filed July 20, 1925 Patented July 1, 1930 UNITED STATES FATE NT former-:1

WILLIAM s. HOLDAWAY, OF SAWTELLE, CALIFORNIA, 'AssIeNoR, BY MESNE Assien- MENTS, TO BYRON JACKSON 00., or WEST BERKELEY, CALIF R -9a Coleman.

TION OF DELAWARE ROTARY DISK DRILL I Application filed July 20,

This invention relates to rotary disk drills such as used in drilling wells. In this type of drill the cutter disks are carried below the end of the shank of the drill,

and as usually constructed, each disk is carried upon a fork, the forks being located opposite to each other. In using drills of this type, it has been found that thematerial cut or excavated by the disks accumulates between the edges of the disks and the end of the shank and frequently becomes clogged at this point. This clogged material sometimes sets and becomes so hard that it is very difficult to remove.

The general object of this invention is to provide a rotary disk drill of this type so constructed as to prevent the clogging of material between the disks and the shank; also to provide improved means for insuring that the water supply will be delivered at the face of the disks.

Further objects of the invention will appear hereinafter.

The invention consists in the novel parts and combination of parts to be described hereinafter, all of which contribute to produce an efiicient rotary disk drill.

A preferred embodiment of the invention is described in the following specification, while the broad scope of the invention is pointed out in the appended claims.

In the drawings;

Fig. 1 is a side elevation of a rotary disk drill embodying my invention, partially broken away and shown in section.

Fig. 2 is a View similar to Fig. 1 but showing the lower portion of the drill in section.

Fig. 3 is a bottom plan of the drill.

Fig. 4 is a horizontal cross section taken on the line 4z"-4: of Fig. 1.

In practicing the invention, I prefer to construct a drill with an elongated shank 1, the upper end of which is provided with means such as a threaded'tapered pin 2 to be secured to the lower end of the tool string. The lower ends of the two oppositely disposed forks 3 are provided with disks which extend down a considerable dis .tance below the transverse end face 4 of the shank in such a way that a relatively deep 1925. Serial No.- 44,774.

throat 5 is formed between therotary disks 6a'nd the: endface 4:. The disksare mounted oppositeto eachv other and sotliat the planes of the disks are substantially parallel with each other, though the axe'sof the clisk'smay be thrown slightly out of alignment with ered or wedge form in its longitudi'nal' sec-@ tion' taken in a plane perpendicular to the axes of rotation of the disks,1and this" nozzle is provided with a duct 9" which cemmuni'-- cates with the bore 7. It is detachably se I cured by a thread connection. The ower-'10 end of this nozzle extend'shdown and pro;

jects' into the space between the disks,

which point the nozzle delivers the water; to the disks. I

In order to enable the nozzle 8 to pas 7 form its function of expelling the cuttings? fromthe disks, its horizontal"cross-section is greater in onedire'ction than the other, and it 'is' preferably" constructed so that, as I viewed in horizontalc'rosss;ection (see Fig. 4) the longitudinal axis of the cross section extends substantially perpendiculanto' the planes of the disks. In this way; when the drill rotates the nozzle gives the effect of a central blader'otating in the space'between the disks' a'nd the end of'the' shank, and the effect of pushing the cl'ogged material out of the throat.

The depth of the throat i'spr'eferablysuch that the" dist'ance from the edgesofthe disks to the endof'th'e shank is substantially equal to'half the'diameter of'the disk- I t is understood that the eniliodiiiierit-ofi the invention described herein is'o n'ly" one of the many embodiments this inventionni'ay take, and" I dofnot wish to bl'imited in the practice ofthe' invention,- nor'jin the claims, to the particular embodiment set forth,

1. A rotary disk drill having a shank with forks extending downwardly from the shank and having a transverse end face disposed between the forks and cooperating with the same to form a relatively deep throat between the forks, disk cutters carried respectively by the forks, said shank having a Water bore extending through the same, and a separate nozzle detachably secured to the said end face extending down into the throat to a point adjacent the upper edges of the cutters, and having a duct communicating with the water bore and delivering water into the space between the disks, said nozzle being in the form of a tapered blade with a horizontal cross-section greater in one direction than in another, and with its large end seating against the said end face, the space between the nozzle and said forks being left open so that the nozzle operates during the rotation of the drill to expel the material tending to lodge above the level of the disks and between the disks and the said end face.

2. A rotary disk drill having a shank with forks extending downwardly from the shank and with a transverse end face connecting the forks and cooperating with the same to form a relatively deep throat between the forks, disk cutters carried respectively by the forks, said shank having a water bore extending down through the same, and a separate nozzle detachably secured co-axially at the said end face, extending downwardly into the throat and having a duct communicating with the water bore for delivering water into the space between the disks, said nozzle being in the form of a tapered blade whose cross-section has a greater dimension in one direction than in another, and operatingto expel cuttings from said disks, there being a space between the sides of the nozzle and the forks, said throat being of such depth that the distance to the end of the shank from the edge of the disks is substantially equal to half the diameter of the disks. 7 i

8. A rotary disk drill having a shank with forks extending downwardly from the shank, disk cutters carried respectively by the forks, said shank having a water bore extending down through the same, and a separate nozzle detachably secured to the lower end of the shank extending down into the space between the cutters and having a duct communicating with the water bore and delivering the water to the disks, said nozzle having the form of a tapered blade operating during the rotation of the drill to expel the material between the disks and the end of the shank.

4:. A rotary disk drill having a shank with forks extending downwardly from the shank and with a transverse end face connecting the forks, disk cutters carried respectively by the forks, said shank having a water bore blade during the rotation of the drill to engage and expel material between the disks and the end of the shank. Signed at Los Angeles, Calif, this 2d day of June, 1925.

WILLIAM S. HOLDAVVAY.