US242730A - Drilling-tool for oil-wells - Google Patents

Description

(No Model.)

i J. 8: A W WOLF Drilling Tool for Oil Wells, 800. No. 242,730.

Patented June 7,1881.

Z. V W

v ww m UNITED STATES PATENT OFFICE.

JOHN WOLF AND ABRAM W. WOLF, OF BRADFORD, PENNSYLVANIA.

DRILLING-TOOL FOR OIL-WELLS, 80c.

SPECIFICATION forming part of Letters Patent No. 242,730, dated June '7, 1881.

Application filed April 15, 1881.

To all whom it may concern: V

Beitknown that we, JOHN WVOLF and ABRAM W.WOLF, of Bradford,'McKean county, Pennsylvania', have invented new and useful 1mprovementsin Drillin g-Tools for Oil-\Vells, &c.; and we do hereby declare that the following is a full, clear, and exact description thereof, reference being had'to the accompanying drawing s and the letters or figures of reference.

marked thereon.

In drilling oil-wells small tools used upon the surface and stones often fall in the well and impede or entirely stop the work. This is particularly so if the tool or stone happens to fall between the reins of the jar. If the'jar becomes fixed it necessitates the use of another jar, which is fastened to the first. 'If the new jar becomes fixed another is added, unless the first jar has become detached. To prevent these accidents a small cup, which fits the hole, has been attached to the rope just above the rope-socket, to catch any substance that might fall in the well. It is obvious that such a device would not answer, as the tools ofttimes have a cutting-edge, which might sever the rope when they fell in the cup. This would be calamitous, as there would be no place where the fishing-tools could catch hold, as the cup, to be in any wise effective, must be of the same, or nearly the same, diameter as the hole. No tool therefore could pass around it, and the hole would probably be abandoned.

To obviate these difficulties is the object of our invention; and to this end it consists of a tool provided with a cup shaped collar or flange, attached at any suitable point thereon, as will hereinafter be described.

Referring to the drawings, Figure 1 represents a sectional view of a jar, showing our saucer-shaped collar attached thereto; Fig. 2, a transverse section on line 3 y, Fig. 1, and Fig. 3 a transverse section on line at 90, same figure.

B represents the common form of jar having the reins b b; D, the sinker-bar; A, the box upon the sinker -bar, and G G saucershaped flanges or collars. These flanges O are preferably made of steel, and may be attached to the tool in any suitable mannerthat is, they may be forged or welded upon, or, if desired, may be provided with screw-threads, which should agree with threads upon the tool.

We do not limit ourselves to any form or particular tool, but preferto place the saucerG upon (No model.)

the drill-jar, as this tool is the one most liable to get out of order by any object getting among the reins b,- or we might place the saucer upon some tool above the jar-for instance, upon the box A of the sinker-bar or upon the ropesocket, as in either of these positions the sancer 0 would catch any tool or stone that might fall in the well and prevent it from interfering V with the working of the tools below.

The incline that gives the flange its saucerlike shape may be at any desired angle; or, if

\ preferred, it may be concave, but we prefer to make it in the form shown. The edges or shoulders of the saucers should be rounded, to prevent them from catching upon the joints of the casing.

We are aware that it is not new to provide drilling-tools with flanges to steady them in the hole. These flanges are flat upon their upper surface, and could not therefore serve thesame purpose as our saucer-shaped flange, for the reason that the end of a tool resting upon this flat surface would slip off if the d'rillin g-tools were lifted, and probably become fixed crosswise in the hole and prevent further upward movement; whereas in ours the end of the tool will rest in the hollow between the body of thetool and the circumference of the flange, and stand straight, or nearly straight, in the hole, and be drawn out with the drillingtools without danger of it slipping outside the flange.

What we claim as new isl. A drilling-tool having a saucer-shaped flange, for the purposes mentioned, and arranged upon its upper end at any suitable point, substantiallyas set forth.

2. A drilling-jar having a saucer-shaped flange arranged upon its upper end at any suitable point, substantially as set forth.

3. A drilling-tool having a saucer-shaped flange, for the purposes mentioned, provided with rounded edges, and arranged upon its upper end at any suit-able point, substantially as set forth.

In testimony that we claim the foregoing we have hereunto set our hands this 12th day of April, 1881. l

JOHN WOLF. ABRAM W. WOLF. Witnesses:

D. L. Lnwrs, M. F. HALLEOK.

Images