US1710925A - Double-cylinder well drill - Google Patents

Description

April 30, 1929.

M. HARDSOCG DOUBLE CYLINDER WELL DRILL Filed sept. 2a,v 1925 2 sheets-sheet 1 April 30, 1929. M, HARDSOCG 1,710,925

DOUBLE CYLINDER WELL DRILL Filed Sept. 28, 1923 2 Sheets-Sheet 2 Patented Apr. 30, 1929.

UNITED STATES MARTIN HARDSOCG, OF OTTUMWA, IOWA.

DOUBLE-CYLINDER WELL DRILL.

Application led September 28, 1923. Serial No. 665,308.

My invention relates to an improvement in well drills, particularly of the larger type, and has for a principal object the provision of a double, or plural, cylinder drill, together with means for controlling the operation thereof so that the drilling elements associated with each cylinder are automatically and continuously operated with increased capacity and efliciency.

A further object of the invention is the provision of a double, or plural, cylinder drill in which the piston cylinders are enclosed within a main cylinder, which latter is divided into separate inlet and outlet chambers, permitting the operating medium (preferably compressed air) to be admitted through one chamber and exhausted through the other, it being thus unnecessary to exhaust against any pressure within the well.

Other objects and advantages of the invention will be apparent as it is better understood from the following description, which, taken in connection with the accompanying drawings, discloses a preferred embodiment thereof.

Referring to the drawings,

Figure l is a. side elevation of a well drill in which my invention is embodied, the same being shown in position in a drill hole and partially broken away for convenience in illustration;

Fig. 2 is an enlarged vertical section taken through the lower portion of the main cylinder and showing the piston cylinders vin section and side elevation, respectively;

Fig. 3 is a transverse section through the main cylinder, showing the piston cylinders in plan;

Fig. 4 is a transverse section, taken substantially on the broken line 4-4 in Fig. 2;

Fig. 5 is a bottom plan view; and

Fig. 6 is a partial vertical section, taken substantially on the line 6*-6 in Fig. 2.

As thus illustrated, the drill comprises a main cylinder 2l, which is composed of upper and lower sections 22 and 23, the latter forming a housing for two piston cylinders 24, in each of which is mounted an operating piston 25 and a drill bit 26. which is disposed in a key-hole 27 in the cylinder 24 and extends through a slot23 in a member 28', which is adapted to receive the impact of the piston 25.

The cylinder sections 22 and 23 are secured the side walls of the main cylinder,

together by means of connecting members, clearly illustrated in Fig. 2. A collar 29 is fitted upon a threaded lower portion. 31 of the cylinder 22 and upon a threaded ortion 32 of a division member 33 above a sioulder 34. Said member is apertured to permit the pistons 25 and certain pipes, to be later described, to extend therethrough and has a lower extension 35 fitting tightly within the cylinder section 23. The piston cylinders are enlarged at their lower ends, as indicated at 36, and a bottom filler 37, tightly positioned within the lower end of the cylinder section 23, closes the lower end of said cylinder section 23 and holds the cylinders 24 in proper alignment.

For the operation of the drill, I provide an air inlet pipe 38, extending down through the cylinder section 22 and communicating with a chamber 39 at one side of the piston cylinders 24. An air exhaust pipe 4l leads to an exhaust chamber 42 at the opposite side of said piston cylinders and it will be noted that said cylinders 24 are welded together and to as indicated at 43 and 44, to provide a partition between said chambers 39' and 42.

A pipe 45 leads to the bottom of the drill and is adapted to direct water or air to the bottom of the hole to carry the cuttings away from the drill bit.

The piston cylinders 24 are duplicates of each other in construction and operation and a description of one of them will, therefore, suffice for an understanding of both. A port 46 is provided in the cylinder wall and opens into a chamber 47 through which the piston 25 extends. The air in this chamber acts upon a shoulder 48 formed by a head 45) on the upper end of the piston 25 and servos to raise said piston within the cylinder. Ports 5l are provided in the wall of the piston 25 and when said piston is raised so that said ports are disposed within the chamber 47, the air is admitted to the interior of the piston and, exhausting through the open end thereof, acts upon a head or plug 52 threaded into the upper end of the cylinder 24. This causes the downward stroke of the piston 25, which strikes against the bit-carrying member 28, to operate the bit or cutter 26. An exhaust port 53 is provided in the cylinder wall opposite a chamber 54 and when the ports 51 enter said chamber on the downward stroke of the piston, the air obviously may exhaust through the ports 5l and 53 into the exhaust chamber 42, from which it 1s d1- rected to the top of t-he Wall through the pip'e 41. The incoming air then again acts upon the shoulder 48 to impart another upward stroke to said piston 25 and the operation is repeated in accordance with the cycle just described.

It will be noted that the actuating air or fluid passes down through the pipe 38 and into the chamber 39, which is in constant communication With the two ports 46 of Jc he two cylinders and through these ports with 'the chambers 47 thereof. Here the actuating fluid is confined while the chambers 47 enlarge through the raising of the strikers 25 until the ports 51 permit the air to pass out of the chambers 47 and into the spaces above the striker. Here a second confinement occurs until the striker is on the point of delivering its blow and the air is exhausted from both cylinders into the chamber 42 at the side ot the cylinders opposite to that in which thc pipe 38 is delivering actuating fluid. From this point exhaust is opened upwardly through the pipe 41. It Will be noted that the arrangement of the drawings, selected for the purposes of illustration, requires no synchronism or timing of action between the plungers, although such arrangement would in no sense depart from the spirit and scope of this invention.

It is thus possible to operate both pistons Within one main cylinder, With consequent 1pcrease in capacity and efficiency of the drill and the air is controlled and directed in such manner that the greatest possible effect is obtained therefrom.

It should be noted that access may be had to the interior of the cylinder 24 by removal ofthe plugs 52, which latter are flanged at the top (as indicated at 55) and are provided with sockets 56 adapted to receive the projections of a spanner wrench or the like. Recesses 57 are formed in the flanges 55 and when corresponding recesses of the adjacent plugs 52 are brought to opposed relationship (as shown in Fig. B) a pin 58 may be inserted' therein to hold said plugs in fixed position with respect to each other.

It is thought that the invention and many of its attendant advantages will be understood from the foregoing description, and it will be apparent that various changes may be made in the form, construction and arrangement of the parts Without departing from the spirit and scope of the invention, or sacrificing all of its material advantages, the form hereinbefore described being merely a preferred embodiment thereof.

I claim:

1. A Well drill, comprising a main cylinder, a plurality of piston cylinders arranged within said main cylinder, an air controlled piston in each of said iston cylinders, drilling means operable by said pistons, and nicans for admitting air at one side of said piston cylinders and exhausting it at the opposite side to cause automatic operation of' the pistons the space at one side of said cylinders being separated from that at the other.

2. A well drill, comprising a main cylinder, a plurality of piston cylinders arranged Within said main cylinder, an air controlled piston in each of said piston cylinders, drilling means operable by said pistons, and means for admitting air at one side of said piston cylinders and exhausting it at the opposite side to cause automatic and continuous operation of the pistons the space at one side of said cylinders being separated from that at the other.

3. A well drill, comprising a main cylinder, a plurality of smaller cylinders Within said main cylinder, air operated drilling means associated with each of said smaller cylinders, means for admitting compressed air to the interior of the main cylinder and to the smaller cylinders for operating said drilling means, and separate means for exhausting said air, the space within said main cylinder being divided to form a separate inlet chamber and an outlet chamber.

4. A Well drill, comprising a main cylinder, a plurality of smaller cylinders within said main cylinder, and drilling means associated with each of said smaller cylinders, each of said smaller cylinders being provided with inlet and outlet ports formed respectively at the opposite sides thereof and arranged to cause automatic operation of said drilling means, and the space Within said main cylinder being divided to provide separate inlet and outlet chambers.

5. A well drill comprising a main cylinder, a plurality of smaller cylinders within said main cylinder arranged substantially tangent externally to each other and internally to said main cylinder to provide separate chambers within said main cylinder, means for admitting compressed air to one of said chambers, means for exhausting air from the other of said chambers, and pistons in each of said small cylinders arranged for actuation hy air from one of said chambers and to exhaust used air into :mother of said chambers.

(i. A well drill comprising a main cylinder,

a. plurality of smaller cylinders within saidmain cylinder arranged substantially tangent externally to each other and internally to said main cylinder to provide separate chambers Within said main cylinder, means for admit-- ting compressed air to one of said chambers, means for exhausting air from the other of said chambers, and pistons in each of said cylinders formed for direct control by air from one of said chambers and to permit the lixhaust of used air into another of said chamers.

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7. A Well drill, comprising, a 11min cylinder, a plurality of small cylinders Within said main Cylinder arranged substantially tangentially externally to each other and internally to said main cylinder to provide separate chambers within said main cylinder, said Chambers being Connectible to said smaller cylinders, means for admitting/ 1r compressed air to one of said chambers, means for exhausting air from the other of said chambers, 1fnnd an air operated drilling means associated with eac-h of said smaller cylinders.

MARTIN HARDSOCG.

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