US860115A - Well-casing shoe. - Google Patents

Description

CTI

REUBEN ofBAKER, or ooALrNGA, oALrFoRiuA.

, I A wnnnonsme SHOE.

no. seams.

Specification of Letters lPatent.

Patented July 16, 1907.

Application filed April 22, 1907. Serial No. 369,588-

'To all whom it may concern:

Be it known that l, REUBEN C. BAKER, a citizen of the United States, residing at Coalinga, in the county' ol Fresno and State ol California, have `invented a new and useful Well-Casing Shoe, of which the following is a specification.

This invention relates to improvementsin apparatus for drilling Artesian wells, and it has for its object to provide an improved shoe or tool adapted to be attached to the Well casing or the boring tube, and having a series ol cutters thereon adapted to operate on'the walls of a relatively small bore, such as is formed by the usual boring tool, and enlarge it to receive the well casing, 'the cutters on the shoe or tool being so shaped as to afford sufficient clearance between the bore and the casing to permit the latter to be readily introduced in the well, the construction of the device being such that it may be made at a small. cost.

, pose oi rezoning or enlarging the bore formed by the ordi- ,bek positively iriitted slimme serres es a Stop Vo To these and other ends, the invention comprises the various novel features of construction and arrangement l of parts, which ivill be hereinafter more fully described and pointed out particularly in the claims appended hereto` i In theaccornpanying drawingz-Figurel is a sectional view of the lower end ol' the well casing havingY end of the well casing when the latter is operated as a part of the boring apparatus, or it may be attached to the usual boring tube, and it is employed for the purnary boring tool or chisel,` thereby sizing the Well bore to receive the Well seasing.

The shoe or tool shown in the present instance is composed of a substantially cylindrical shell ll made of tool steel or other suitable material andlis provided .with suitable means for attaching it to the wellcasing or other operating part, the means shown in the present instance embodying screw threads 2 formed on the in- .terior of the shell at a point intermediate its ends, and

` toward the lower end of the shell is formed an 'annular slvioulde` 3 wl:u', :hv Aprojects inwardly from the bore of $11 l and isi4 adapted .to vCooperate with the lower e well-easing or'operating part' 4 os a stopv lrees Aactingl.longitudinally of theipart will "to theshoeor tool the vent the casing or other part from becoming too tight on the screw threads, especially when a relative rotary movement is transmitted between the well casing, o1' other part, and the shoe or tool. This shoulder also provides a relatively thick portion on the shell on which the cutters-are formed; and the lower end of the thickened portionpf the shell is llared'outwardly, as at 5. The cutters em` ployed in thepresent instance embody a'series of concentrically arranged teeth 6 that are of substantially prismatic form, and those shown in the present instance may be readily formed by milling a series o slots 7 radially of the shell, forming iront and rear cutting edges' 8 and 9, and the inner sides of the teeth are beveled to forni a lower cutting edged() at the lower endof the shell, the flared form of the shell causing the outer cutter edges l0 to project beyond the outer wall of the shell, and in operation serves to afford ample clearanceor the body of the shell and the Well casing.l

The shoe -or tool ,shown in the present instance is operated by a combiried longitudinal and rotary movement'of the well casing or other operating part of the apparatus, the cutters constituting a series of chisels i as the boring operation progresses, and the shoe or tool remains in'position at the bottom of the well, the construction shown being relatively simple so that the devices may be used at a small cost. The flared iorln of the shell at the point where the cutters are formed in surcs a sufficient clearance between the bore of the well and the exterior oi the well casing, as will permit the unions or other joints employed to pass into the well bore Without liability oi its becoming caught, so thatV the operation oi applying the well casing is facilitated.

1. A well boring tool of the character doschs., einbodying a shell adapted for attachment to a sx'l'ltible operating part and having its lower end ilared, and a series of cutters formacion the flared portion of the shell.

2. A wel) boring tool of the character described embodylng a shell adapted to be attached to a suitable operating part, the lower 'end of the shelly being ared outwardly 'and beveled at its inner side, and 'a series or clrcularly nrrsnged cutters having cutting edges formed on the Ilm-,ed

portion' of the shell. ,t l,

. y l 3. A well boring vtool, of the' character described embodying ashell adapted to he attached to asuitable operating port, the lower portion of the shell being provided with :rshoulder extending around the inside thereof, the lower casing, the lower end of the shell being beveled inwardly r portion ot the shell, being ared outwardly and provided vvj/ith a'beveed surface extending A inwardly from the tinged portion, and a series of circularly arranged cutters formed on the flared portion ofthe shell.

4. A well boring tool of the chara'cter diesel-ined` embodylng s. substantially cylindrical shell having its lower end lured outwardly, an annular shoulder formed at the lower pogtion 'of `the shellnthreads formed in the bore of the Blll'l stie., nontzillfe theshoulder end advapted to comprate with zi-oorrespondlngly threaded end of the well from the ared portion and provided with substantially radial slots forming a series of cutters on the lower flared end of the shell.

In testimony that I claim the foregoing as my own, l have hereto affixed my signature'ln the 'presence of two Witnesses. l

' REUBEN C. BAKER.

Witnesses:

kJ. E. LACEY, IH. HENSHAW.

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