US1768577A

US1768577A - Drill-cutter mounting

Info

Publication number: US1768577A
Application number: US246722A
Authority: US
Inventors: John R Dallerup
Original assignee: Reed Roller Bit Co
Current assignee: Reed Roller Bit Co
Priority date: 1927-08-22
Filing date: 1928-01-14
Publication date: 1930-07-01
Anticipated expiration: 1947-07-01

Description

Original Filed Aug. 22, 1927 l/ v Il H Patented July i 1, A1930 UNITED STATES PATENT OFFICE JOHN R. DALLERUP, OF-EOUSTON, TEXAS., ASSIGNOR TO REED ROLLER BIT COMPANY, OF HOUSTON, TEXAS, A CORPORATION OF TEXAS DRILL-CUTTER MOUNTING Original application led August 22, 1927, Serial No. 214,683. Divided and this application iiled January 14, 1928. LSerial No. 246,722.

This invention relates to drills, and more particularly to drill cutter mountings of the type disclosed in my application for Letters Patent` of the United States, filed August 22nd, 1927, Serial Number 214,683,

of which this is a division.

The invention has for one of its speciiic objects the provision of 'an adjustable cutter mounting whereby a cutter may be mounted in various positions in a drill head.

Various other objects will hereinafter apear.

j p The preferred embodiment of the invention is illustrated by the accompanying drawing, inwhich Fig. 1 is a fragmentary side elevation of a bit head; Fig.` 2 is a fragmentary detaill side View at right angles to Fig. 1; Fig. 3 is a fragmentary side elevation illustrating the mounting of'ya reamer in the side of a reamer body; andiFig. 4 is a section on the line 4 4 of Fig. 3.

Referring specifically to Figs. 1 and 2 of the drawings, the bit head is indicated at A, and has the usual cross roller cutter recess in the bottom thereof and depending bearing projections A. Said projections support the ends of pin 3. Pin 3 has a sleeve or bushing 2 thereon, and. cutters 5 are revoluble on said bushing.'

This invention provides means whereby the axis of rotation of said cutters may be adjusted so that said cutters will project the desired distance below said head. l

The ends of pin 3 are substantially rectangular in cross section, and each ofthe bearin openings in the depending projections is adapted to receive one end of pin 3 and one of the gibs indicated by 1 and 1. One of these gibs may be made integral with pin 3.

`As shown, the parts are so disposed that the cutters will be held in their lowermost position. To so adjustl the parts that the cutters will be held in their uppermost position, it is necessary only to move the

gibs

1 and 1 so that they will be under the ends of pin 3. The gib 1 and the adjacent end of pin 3 are bored for the reception of retaining set screw 4. The gib 1 and the other 50 end of the pin 3 may be detachably connected together by a peg 11, which is preferably driven through the gib 1 into the pin 3, as shown.

To increase the diameter of a well bore, it is now the custom to remove the original reaming cutters from the head, and to mount larger cutters in the place thereof, the bit This, invention provides a mounting which renders unnecessary the use of cutters of more than one size, an embodiment thereof'being illustrated in Figs. 3 and 4 wherein the reamer body as indicated at B has a rounded recess in which the reamer cutters 8 are mounted.

.The pin having ends non-circular in cross section is indicated at 6, the gibs at 5, the retaining set Vscrew at 9, the bushing ,at 7, and the reamer cutters at 8.

vThe position in which the reamers are held is advantageous yfor various reasons, of which the ability to cut a hole' of a great diameter may be mentioned.- Should it become desirable to pass the'reamer assembly through a pipe casing of a comparatively small internal diameter the gibs may be placed on the outside of pin 6. It will be understood that the pin 6l is removable through. the opening 10.

It is not necessary that the intermediate portions of the pins 4 or 6 be noncircular in cross section.

I claim:

1. In a drill, a head having a bearing, a pin, a gib,`said pin and gib being supported in said bearing, and a cutter supported Joy said pin, said gib being movable to'vary the position of said cutter with respect to said head.

2. In a drill, a head having a bearing, a pin, said pin being non-circular in crosssection, and a gib, said pin and gib being supported in said bearing, and a cutter supported by said pin, said gib being movable to vary the position of said cutter with respect to said head.

3. In a drill, a head having a pair of bearings, a pin, the ends of said pin being noncircular in cross-section, and a pair of gibs, each of said bearings supporting one of the ends of said pin and one of said gibs, and a cutter supported by said pin, said gibs being movable to vary the position of said cutter with respect to said head.

4. In a drill, a head having a pair of bearings, a pin and a pair of gibs, each of said bearings supporting one end of said pin and one of said gibs, and a cutter supported by said pin, said gibs being movable to vary the position of said cutter with respect to said head.

5. In a drill, a head having a recess and a bearing opening communicating With said recess, a pin, a gib, said pin and gib being supported in said bearing, and a cutter supported by Vsaid pin, said gib being movable to vary the position of said cutter With respect to said head.

6. In avdrill, a head having a recess and a bearing opening communicating With said recess, a pin, a gib, said pin having an end non-circular in cross-section, said end and said gib being supported in said bearing, and a cutter supported by said pin, said gib being movable to vary the position of said cutters with respect to said head.

7. In a drill, a reamer body having a recess in the side thereof, and a bearing opening communicating with said recess, a pin,

a gib, said pin and gib being supported in,

said bearing' opening, and a reamer cutter supported by said pin, said gib being movable to vary the positiomnr` said cutter vvithl respect to said body.

In Witness whereof, I hereunto aix my signature.

JOHN It. DALLERUP.