US1360328A

US1360328A - Drill

Info

Publication number: US1360328A
Application number: US346273A
Authority: US
Inventors: John C Stokes
Original assignee: Individual
Current assignee: Individual
Priority date: 1919-12-20
Filing date: 1919-12-20
Publication date: 1920-11-30
Anticipated expiration: 1937-11-30

Description

i. C. STOKES.

DRILL.

PPLICATION FILED nc.2o, m19.

Patented Nov. 30, 1920,

2 SHEETS-SHEET 2.

. cll-n'x :h5-15211155.

514mm, tot

UNITED STATESy .PATE-IN1"OFFI'.`

JOHN U. STOKES, OF SHREVEPORT, LOUISIANA.

DRILL.

Application med December To all whom t may conceive.: p

Be it known that I, JoHN (l. b'roxns, e

citizen of the United States, residing at Shreveport, in the county of Caddo and Stute of Louisiana., have invented certain new and useful Improvements in Drills, of which the following is :i specification.

This invention relates to Well digging apparatus, and the primari7 object of the invention is to provide an improved drill having ineens for chaniefiimr the drill bits in o deep well, without necessitating the witle drewel of the drill stem or pipe from the hole.

Another object of the invention is the rovision of an improved means for expan ing the drill` bits, after the sinne have reached :i predetermined position in relation to the drill stein lor pipe, and for holding; the bits in their extended posilions against ac cidental displacement.

A further object of the invention is to rovide on improved means for connecting the drill hit to the drill holder, so that the drill holder will engage the-hit in such e manner that the weight thereof will ef fcctively hold the bit in extended position and brace the .same so as to prevent breek ege thereof when the same strikes a rock or boulder.

further object of the invention is to provide u sectional bit. which when in its extended position will be identical in form with the usual solid fish tail bit now in vogue, which has 'been found to give the best results .in deep well boring.

A still further object of the invention is to provide an improved bit holder havingr means formed therein for effectively waslr inp; the curved terminals of the bit sections, so :is to remove the debris from around the sinne during` the drilling operation.

still further object of the invention is to improve thc construction of the tool holder or bushing,F so as to effectively bruce the bit sections when the salme are in their extended positions, so as to prevent the breaking of the bits when the tool-is in operation.

A still further object of the invention is to provide an improved device oi the above character which is of exceedingly simple and durable construction. one which will be easy to monufnelure, and one which con specicefion of Letters Patent.

. rier.

Patented Nov. 30; 1921 20, 1919. arial N0. 346,273.

be placed upon the market at a reasonable cost.

Other objects of the invention will iil'ppearl -through the improved drill apparatus.

Fig. 2 is an enlarged fragmentary section shoiving the drill bit holder in its raised position, and the bits in their collapsed relation.

Fig. 3 is an enlarged vertical longitudinal section teken at right angles to Fig. 1, and showing the bit holder and bits in their raised position.

Fig. 4 is a detail transverse section taken on the line 4-4 of Fig. 1.

Fig. 5 is e detail transverse section taken on the line 5--5 of Fig. 3.

Fig. 6 is a detail vertical longitudinal section taken on the line 6-6 of Fig. 1.

Fig. is a detail transverse vsection through the tool holder or bushing' taken on the line 7-7 of Fig. 3. and

Fig. 8 is a bottom plan view of the tool holder or bushing, showing the bits in their extended operative positions.

Referring to the drawings, in detail, wherein similar reference characters designele corresponding parts throughout the several views, the letter A indicates the improved device which includes the stem B, the tool holder C. the bit carrier D, the bit E and the hoisting cable F for the bit car- The stem B is made up of the usual pipe sections 10 of the desired diameter connected together in the usual manner. The uppermost pipe section 10 has rotatably connected thereto the cop 11 by the usual or any preferred couplingrl, and the cap is provided with a henger 13 and hose 14. Any standard rig i' not hose connection and ferrule can be used with the improved drill. The lowerrnost pipe section 10 has threadably connected thereto the bushing or tool holder C.

The bushing or tool holder C includes a tubulnr'lmdy l5 having its upper end pro vided with internal threads 16. for thc reception of the lower threaded end of the loivernnist pipe section l0 as heretofore stated, and the body 15 directly below the shown), cap. hunger,

shoulders 20. If the blades 26` do not drop at once into their places, they will remain against the walls 18 until they are lowered to the bottom of the well and the tool holder begins to revolve, and when anything strikes the bit it will have a tendency to hold the same, and the saine remains stationary until the toolholder touches them, at which time the weight of the tool holder C and bit carrier D will force the blades 26 into the slots 19 and against the shoulders Q0. When the whole tool is revolving', the bits A will have a tendency to brace one another in the center of the tool holder. The drilling is done in the usual manner, and the water or mud und water that has come down the drill stem, to remove the debris from the bottom of the well passes from the pump through the hose 14, `throu l1 the perforated cable holder ell] which Wi l be hereinafter more fully described down the drill stem B through the openings 35 and36 to the bottom of the well and up the outside of the drill stem ll to the surface of the ground i When it is desired to remore the drill hit E from the stem the same is raised in the manner heretofore described, and the can reu moved, after which the cable l+` is puller upwardly which 'forces the bolt 33 to the upper ends of the slots thus collapsing the blades 26 of the bill E and thus permitting the same to be easily pulled out o the stem.

The perforated cable holder 4-0 is of disk shape and is provided with u slot 41 to hold the cable F in position when the last cable section is placed in position. The upper ter minal of the last cable section is provided with the coupling` 42 which prevents the u i per end of the cable from slipping out of t .e slot 41, This plate or cable holder 40 can he placed in any joint of the drill stem B. It is so constructed that the same will fit the end o'l` a section of the drill pipe B, and at the same time allow the section to he Fitted into the coupling or pipe cap.

From the foregoing description 1t can be seen that an improved drill is provided of exceptionally durable and simple construction, which will permit the drill bit to be changed, Without necessitating the removal of the entire drill stem.

Changes in details may be made without departing from the spirit. or scope of my 1n vention; but,'

I claim:

1. A drill comprising a tool holder, a sectional bit, and means slidably and pivotally carrying the bits arranged to open and close the seme in relation to each other.

2. A drill comprising a stem, a tool holder carried by the stern, a bit carrier, a support on the carrier, a bit including a. pair of sections slidably and pvotally mounted on said support,

A drill comprising a stem, a tool holder carried by the lower end of the an inwardly` extending annular shoulder 5. A drill comprising a stem, a tool holder A carried by the stem, a bit carrier including a heavy body and a pair of dependin spaced legs, n holt carried by the legs and extending transversely across the same, a pair of bit blades slidably and pivotall mounted on said holt, and outwardly exten ing shoulders formed on the upper terminals of the bit blades, arranged to engage the tool holder when the same reaches a. predetermiued osition.

6. A drill comprising a stem, a tool-holder carried by the stern, a bit carrier arranged in the holder, a pair of bit blades having slots formed therein below the transverse axes thereof mounted in said holder, and a holt carried bythe bit narrier fitted in said slots arranged to slidably and pivotally support said blades.

7. ln a' drill, a drill carrier, a pair of relatively long bit blades havin slots formed therein arranged entirely belw the transverseexes thereof, and a bolt carried by the carrier positioned in said slots arranged to slidably and pivotally support said blades.

8. A drill comprising e stem, a tool holder, a bit carrier slidably mounted in the stem and holder* indluding a solid body, and a pair of depending spaced le bit blades slidably and pivotally carrie by the legs offthe carrier, the legs of the carrier having longitudinally extending bores therethrough terminating adjacent to the lower ends of the bit blades.

9. A drill comprising a stem, a tool holder stem having formed therein, a bit carrier slidably mounted in the stem and holder, the inner face of the holder below the shoulder being provided with an outwardly flared face, bit blades pivotally and slidably carried by the carrier, yand having outwardly rejecting extensions formed on their outer edges adjacent to their upper ends arranged to engage the shoulder, the blades having inwardly extending inclined notches formed therein opposite to said projecting portions arranged to engage the shoulder.

10. A drill comprising a stem, a tool holder carried by the stem, a bit carrier slidably mounted in the stem and tool holder,

said tool holder having an internal annular `of the bits arranged to engage the shoulder of 4the tool holder to prevent downward movement thereof, the outer edges of the blades being arranged to enga e in the 10 grooves and lon itu( inallyexten ing shoulders when the b ades reach their lowermost positions.

J OHN C. STOKES.