US49717A - Improvement in expanding drills for well-boring - Google Patents

Description

NrTED STATES PATENT OFFICE.

GEORGE F. OASE, OF BROOKLYN, NEW YORK.

IMPROVEMENT IN EXPANDING DRILLS FOR WELL-BORING.

Specification forming part of Letters Patent No. 49,717, dated September 5, 1865.

To all lwhom it may concern:

Be it known that I, GEORGE F. GAsE, of Brooklyn, in the county of Kings and State of New York, have invented a new and useful Improvement in Expanding Drills for Artesian Vells; and I do hereby declare that the followin gis afull, clear, and exact description thereof, which will enable those skilled in the art to make and use the same, reference being had to the accompanying drawings, forming part of this specification, in which- Figure l represents an apparatus or implement made according to my invention, the greater part thereof being shown in section.

Fig. 2 is a longitudinal section thereof at right angles to the section in Fig. l. Fig. 3 represents a modification thereof, partly in section. Fig. 4 is a longitudinal section at right angles to the view given in Fig. 3. Fig. 5 is a plan or top view of Fig. l.

Similar letters of reference indicate corresponding parts.

The object of this invention is to produce an implement or apparatus by means of which the bottom of an Artesian well or any other part thereof can be chambered out or enlarged in diameter; and it consists in a tube which carries in a diametrical chamber at its lower end a horizontal drill capable of being driven outward beyond the periphery ot' the tube in order to cutaway the sides of the well when the tube which carries it is rotated.

A is a hollow cylinder, closed at thebottom, whose length is to be such as to extend from the surface of the earth down to the place to be chambered out. This cylinder is to be rotated by any suitable means, as by a belt or coggearing, or by a crank. Such means are not here shown, because I do not claim any particular manner of applying them. The bottom of the cylinder has a horizontal opening, E, made A clear across it on the line ofits diameter, to receive a drill or reaming-tool, D, whose upper Side has teeth cut thereon, as shown in the drawings. An annular groove, H, is cut in the bottom ofthe cylinder, in its inside, which intersects the opening E on opposite sides.

B is a central shaft, extending the whole length of the tube A, and fitted on top with a crank, F. Its bottom carries a helix, I, whose outline is seen in dotted outline in Fig. 5, and

which revolves in said groove H, and consequently when in motion engages the teeth on the tool D and causes said tool to protrude beyond the circumference of the tube when the crank is turned in one direction, and to be withdrawn when turned in the opposite direction. The bearing-point of the shaft is in the solid part of the bottom of the cylinder, above the opening E. Vhen the tool D has been protruded beyond the circumference of the tube it is evident that the revolution of the tube will cause the sides of the well to be worn and cut away by the tool. The tube may be nearly equal to the diameter ofthe well, ifsuch tube s specially provided for the operation deseribed; but the ordinary welltubing, which is ot' much less diameter, may be used for this purpose, in which case, iu tting the tool to its bottom, provision should be made not only for strengthening the bottom of such tubing, but also for properly supporting the tool therein. When the tool D has been driven out to its greatest extentthe advanced edge of the helix I comes against the broad tooth Gr of the tool, and the advance of the tool is stopped. So when it has been withdrawn into the tube the opposite edge of the helix comes against the broad tooth G at the opposite end ofthe tool, when its return movement ceases.

The modication of my invention shown in Figs. 3 and et consists in detaching the bottom of the tube H' from the rest of the tube, and in connecting such bottom to the shalt B, so that they revolve together, and also in forming the helix I, which drives out the tool D, upon the lower edge ofthe tube. When thus arranged the revolution ofthe tube causes the protruding end ofthe tool D to abrade and cut away the sides of the well, as in the plan above described. When the helix has reached the blank space G', where the teeth on the upper side of the tool have been cut out, the advance of the tool ceases, but since, if the tool and the helix were left in the position at which that advance places them, the helix would not be able to return the tool by a revolution in the opposite direction,therefore Ihave provided a spring, L, whose force is always exerted to carry the tool toward the right, so as to bring its last tooth against the inner side of the helix, whereby the helix is kept in constant engagement with the teeth of the tool to Withdraw or to advance it. 2. Advancing the tool D in a. horizontal di- The spring is placed ou the end of the hangrectiou, substantially as and for the purpose ing` bracket'K, whose end is screwed into the above described. 1 bottom section, H. The free end of the spring 3. In combination, the tube A, the shaft B, enters a recess made for itin thclowcr side of the tool D, toothed as described, and. the helix the tool I), au opening, J, being;` cut in the bot- I, substantially as shown. tom part, H, for the spring to play in. l I claim as new and desire to secure by Let- G. F. CASE. j ters Patentl. Enlarging the diameter ofthe bottom or Witnesses: other part of an Artesian well, substantially as S. T. POMEROY, shown. M. M. LIVINGSTON.

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