US1643730A - Well drill - Google Patents

Description

WELL DRILL Filed Oct. 16, 1924 2 Sheets-Sheet 1 Jig].

' 1,643,730 Sept. 27, 1927- WILD WELL DRILL Patented Sept... 27, 1927.

PATENT OFFICE.

CHARLES WILD, OF EUREKA, CALIFORNIA.

WELL DRILL.

Application filed October 16, 1924. Serial No. 743,989.

This invention relates to well drilling tools and aims to provide a drill of a novel construction including tubing and movable cutting jaws arranged adjacent to the lower end of the tubing, the jaws being constructed so that they may be moved to positions beyond the lower end of the tubing to cut a path for the tubing.

Another important object of the invention is to provide a drill of this character which will accomplish the drilling result and at the same time preserve a core for testing purposes, which core is removed by a specially designed tool. I

A still further object of the invention is the provision of movable cutting jaws that are automatically moved from their inactive to their active positions at the limit of the downstroke of the drill.

With the foregoing and other objects in view which will appear as the description proceeds, the invention resides in the combination and arrangement of parts and in the details of construction. hereinafter described and claimed, it being understood that changes in the precise embodiment 0 the invention herein disclosed, may be made with'n the scope of what is claimed, without departing from the spirit of the invention.

Referring to the drawingszj Figure 1 is an elevational view illustrating the lower end'of a drill constructed in accordance with the invention, the cutting jaws being shown in their active positlons.

A Figure 2 is a longitudinal sectional view 1 through the drill.

Figure 3 is a bottom plan view thereof. Figure 4 is a sectional view taken on line 4-4 of Figure 2,.

Figure 5 is a sectional 5-5 of Figure 2.-

Figure 6 is a sectional view taken on hne 6-6 of Figure 2. 1 Figure 7 is a perspective view of one of view taken on line the! connecting links.

re 8 is a perspective view of'one of- Figu the cutting jaws.

Referring to the drawings in detail, the

reference character 5 indicates the outer casing of the drill in whichthe drill casing 6 moves.

The reference character 7 indicates the head of the drill casing which is secured within the casing by means of the bolts 8, the head 7 being provided with an opening through which the controlling rod 9 moves. Disposed within the drill casing and as shown, each of these blocks 12 is formed with an car 14. apertured to receive the shafts 15 that secure the connecting link 16 to the blocks 12 in a manner to permit the link 16 to swing vertically,

The shanks 18 are formed with openings 18 that receive shafts 19 for securlng the jaws 19 tothe links 16. At the lower end of the drill casing 6 is guide member 17 formed with openings through which the shanks 18 of the cutting jaws 19 move, the openings beingarranged at oblique angles so that when-the jaws are moved to their active positions, the lower ends thereof will extend beyond the outer surface of the easing 5 to undercut the lower end of the easing 5 and allow the casing to move downwardly. j

As illustrated by Figure 2 of the drawings, the rod 9 is formed with a threaded extremity 22 are positioned, the members 21 and 22 being held in spaced relation with each other to accommodate the heads 23 of the links 16, to the end that reciprocating movement of the rod 20 will result in movement of the connecting links 16 to move the cutting jaws into and out of their active positions.

A coiled spring indicated at 24 has its lower end engaging the member 21 that acts as a seat. for the coiled spring, while the opposite end of the coiled spring 24 engages under the partitioning member 10. This spring 24: normally acts to urge the members 21 and 22 downwardly towards the.

20 on which the members 21 andproper has beem released or dropped into the well being drilled. I

, Formed at the upper end of the rod 9 is an eye 25 to which a' suitable hook may be connected, thehook being of the usual type employed in the drilling of wells to permit ofa quick and easyapplication of the hook. The device is supported by the usual twisted cable which gives'the device a slight rotary movement as it is dro ped to the end that the jaws will be shi ed and will not be to undercut the casing 5 and allow the casing 5 to feed downwardly into the opening formed. Continuous reciprocation of the jaws results in the cutting or underreaming of the wall to allow the casing 5 to movev downwardly.

It will be obvious that the device cuts into the ground with each downward movement of the rod 9, leaving a central core which is removed by an especially constructed tool forming the subjectmatter of a separate application, the finer particles of stone and earth being removed by the well known bailer system.

I claim 1. A drilling tool including blocks secured within the drill casing and arranged in spaced relation with each other, connecting links having pivotal connection with the blocks and having heads, jaws having connection with the links at points intermediate the ends of the links, means .operating through the drill casing and engaging the heads of the links to move the jaws so that the cutting surfaces thereof will extend beyond the end of the drill casing.

. 2. A drilling tool including a drill casing, a rod extending through the casing and having adjustable members arranged on the lower end thereof, links having pivotal cona drill casing,

nection with the inner surface of the drill casing and having their free ends disposed between the adjustable members to connect the links to the rod, cutting members having pivotal connection with the links and adapted to move at oblique angles with respect to the drill casing to cause the cutting members to be extended beyond the lower end of the drill casing to cut the ground surface below the drill casing. i

3. A drilling tool including adrill casing, a partitioning member within the drill casing, a rod extending through the partitioning member, connectingmembers mounted on the rod, cutting members extending into the drill casing, means having connection with the upper ends of the cutting members and positioned between the connecting members for moving the cutting members when the rod is moved, and a coiled spring engaging the partioning member and resting on one of the connecting members for normally urging the cutting members to their active positions.

4:. A drilling tool including a drill casing, an inner movable drill casing, a vertically movable rod within the inner casing, a head on the rod, jaws within the inner casing, means connected with the inner casing and engaging within the head for connecting the aws and rod, a guiding member through which the jaws move, said guiding member being carried by the inner casing, and a coiled spring on the rod for normally urging the rod downwardly.

In testimony that I claim the foregoing as my own, I have hereto afiixed my signature;

. CHARLES WILD.

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