US2291732A

US2291732A - Drilling rig

Info

Publication number: US2291732A
Application number: US331878A
Authority: US
Inventors: Arthur L Lay; Carl C Farque
Original assignee: Individual
Current assignee: Individual
Priority date: 1940-04-26
Filing date: 1940-04-26
Publication date: 1942-08-04
Anticipated expiration: 1959-08-04

Description

Aug. 4, 1942. A. L. LAY ElAL 2,291,732

DRILLING RIG I Filed April 26, 1940 s Sheets-Sheet 1 Aug. 4, 1942; A. L. LAY ETAL 2,291,732

DRILLING RIG- 1942- A, L. LAY EIAL 2,291,732

DRILLING RIG Filed April 26, 1940 3 Sheets-Sheet 3 Patented Aug. 4,1942

, DRILLING BIG Arthur L. Lay and Carl C. Farque, San Antonio, Tex., asslgnors to Olive S. Petty, San Antonio,

Tex.

Application April 26,1940, Serial No. 331,878 2 Claims. (Cl. 255-19) This invention relates to drilling rigs such as are primarily intended for use in connection with core drilling operations, the drilling of shot holes in seismic surveying, and the like. It is the principal object of the invention to provide a compact portable rig for these and similar purposes.

In a preferred form of the invention the rig comprises five principal parts, a support, a derrick, a power means, an encased power transmitting mechanism, and the drill operating mechanism. It is a feature of the invention that the rig may readily be dismantled and its component parts moved from place to place. For this purpose each of the principal parts preferably weigh less than 100 pounds each so that the assembly or dismantling of the rig may be effected by one man equipped with a single wrench for the manipulation of a few bolts. Preferably, all elements are mounted on a single support so that the entire mechanism may be moved on the skids of the support from one drilling operation to another without dismantling. In attaining these and other objects and features of the invention as hereinafter pointed out, we have provided improved details of structure, the preferred form of which is illustrated in the accompanying drawings, wherein:

Figure 1 is a perspective view of the assembled drilling rig;

Figure 2 is a perspective view of the chain drive casing and associated elements;

Figure 3 is a perspective view partly in section, of the drill operating mechanism of the rig; and

Figure 4 is a vertical sectional view of the chain drive casing and a part of the drill operating mechanism.

In order to facilitate an understanding of the invention, specific language is employed in describing the embodiment of the invention shown in the drawings and selected for the purpose of illustrating the principles thereof. It will, nevertheless, be understood that no limitation of the scope of the invention is intended by the use of such specific language, various structural alterations and modifications being contemplated, such as would occur to one skilled in the art to which the invention relates. v

Referring to Figure 1 of the drawings, the entire rig is shown mounted on a frame or support which preferably comprises two parallel bars or skids it on which are mounted parallel upright members l2 and parallel inclined members ll. Members in and H are connected by by various braces as at I4 and IS. The entire support may thus be formed of conventional structural metal elements and all members may be connected together in any conventional manner but are preferably bolted.

Mounted upon the support is a derrick comprising three or more upstanding tubular supports l1, l8, and I9 at the apex of which is mounted a pulley 20. A rope 2| passing over pulley and operated by cathead 22, is adapted to lift the swivel head 23 which holds the upper end of the conventional Kelly rod.

A gasoline engine 26 is mounted on the support by means of a cross bar 21. The power or driving shaft 3|! of the engine enters a housing or casing 28 in which are located chain drive members which drive a hydraulic pump 29, the cathead 22, and a drill rotating mechanism 3| through a clutch mechanism 22. The drill mechanism includes a Kelly rod 34 which is reciprocated by parallel pistons 35-35 through chuck 36.

elements l3 and the skids it are held in place 5 Referring now to Figure 2 which shows the exterior of the chain drive casing 28, it will be seen that the casing is substantially rectangular and that the engine shaft 30 enters the lower part of the casing. The hydraulic pump 29 is operable by a shaft located centrally of the casing, and the cathead 22 is near the upper end of the casing. The pump 29 is connected to fluid supply tank 39 by pipe 40 and to the hydraulic cylinders 50 through the pipe M, the fluid returning from the cylinders through pipe 42 into the tank 39. Inserted in the pipe M is a safety high pressure relief valve 43, a manually operable pressure control or shut-off valve 44, and a manually operable four-way valve 41 for changing the direction of reciprocation of the hydraulic pistons. The casing 28 and tank 39 are mounted on the support by means of the cross-bar 4B and bolted thereon, bolt holes 49 being provided in the cross-bar.

Referring now to Figure 3 which shows the drill operating mechanism, it will be seen that the drill is reciprocated by means of hydraulic pistons 35-35 operating in the cylinders 50-50. The cylinders are supplied, as hereinbefore mentioned, through pipe 4| and the fluid returns to the tank by means of pipe 42. To facilitate assembly of the parts, portions of pipes 4i and 42 may be made of flexible material, as at 5| and 52. The pistons 35-35 are connected to the chuck 36 by means of the yoke 53 and the bearing members 5%. The Kelly rod rotating mechanism 3i is attached to driven shaft 55 by means Referring now to Figure 4 which is a sectional view of the chain drive casing showing its operative connection with the drill rotating mechanism, it will be seen that drive shaft 30 in the lower end of the casing has a small sprocket wheel integral with the shait. An endless chain 6| connects the sprocket 46 with a larger sprocket 62 integral with the central driven shaft 63 which operates the hydraulic pump 29 and upon which is also integrally mounted a smaller sprocket 64 approximately corresponding in size to sprocket 46. Sprocket 64 drives another endless chain 66 which rotates a large sprocket wheel 61 substantlally the same size as sprocket 62 and rigidly mounted on driven shaft 32 at one end of which is mounted the cathead 22 and the other end of which is adapted to engage the rotary drill driving mechanism 3|. It will be seen that the plates of the casing are held in place by means of bolts 69-69 and spacer sleeves HI-10; adjustable chain tighteners 72-72 are interposed between the sprocket wheels. A clutch mechanism 32 connects the driven shaft 56 and a drill rotating shaft 1.5. The shaft operates in bearings 16 and has a bevel gear 11 at its end which drives bevel gear 18, thus through the Kelly rod bearing 19. In the operation of the drill it will be seen that the gasoline motor drives shaft 30 at a higher rate of speed than the central shaft 63 driving the hydraulic pump and that the driven shaft 56 rotates at a speed still slower than the central shaft. The operator may start or stop the rotating mechanism by the control means 51 and he may control the reciprocation of the pistons by the valve 41.

It will be seen from the foregoing that the assembly is a simple matter. The support is first rotating the Kelly rod 34 assembled and bolted. together and the derrick bolted on it. The drill operating mechanism is then put in place and bolted through the holes I! in cross-bar 58. Next the power transmission casing is put in place and bolted to the support through holes 49 in cross-bar 48 and to the lower cross brace. Flexible hoses 5| and 52 are now inserted to connect the pump and the hydraulic pistons. The engine is then put in place with the shaft inserted in it, and is bolted to the support. The rope is strung from the'cathead 22 to the swivel head 23 over the pulley 20 and the rig is ready for operation.

Having thus described the invention, what is claimed as new and desired to be secured by Letters Patent is:

1. In a portable drilling rig, a derrick, a support, three separate units adapted to be held in place on said support comprising an engine unit; a drill mechanism comprising a drill with hydraulic feed and a gear operated drill revolving means; and a casing unit including a casing member, a chain drive within said casing mem-- her and operatlvely connecting said engine and said drill revolving means, a hydraulic pump, and a tank for hydraulic fluid attached on the outside of said casing; means on each of said three units for detachably securing them to said support and conduits for conveying fluid between said hydraulic feed and said pump and tank.

2. In a drilling rig, the combination of an engine, a drill mechanism comprising a hydraulic feed and drill revolving means, a casing unit including a casing member, drive means within said casing operatively connecting said engine and said drill revolving means, a hydraulic pump and tank-carried by said casing member and conduits between said hydraulic feed, pump and tank.

ARTHUR L. LAY. CARL C. FARQUE.