US122149A - Improvement in spring-bits for cleaning and enlarging wells - Google Patents

Description

JAMES H. BOYD.

lmprovement in Spring Bit for Cleaning and Enlargingh Wells.

Patented Dec.26, 1871.V

UNITED u STATES PATENT QEEICE.

JAMES H. BOYD, OF MONTEREY, PENNSYLVANIA.

Specification forming part .of Letters Patent No. 122,149, dated December 26, 1871.

To all 'whom it may concern:

Beit known that I, JAMES H. BOYD, of West Monterey, in the county of Clarion and State of Pennsylvania, have invented a new and Improved Spring-Bit for Cleaning and Enlarging Wells; and I do hereby declare that the following is a full, clear, and exact description thereof, which will enable others skilled in the art to make and use the same, reference being had to the accompanying drawing forming part of this specification.

' Figure 1 represents a face view, partly in section, of my' improved well-bit. Fig. 2 is a section of the same taken on the plane of the line c c, Fig. l. Figs. 3 and 4 are side views of the bit, showing it with a long and short spring-jaw, respectively. y

Similar letters of reference indicate corresponding parts The ob]l ect of this invention is to produce a convenient tool for cleaning out' or enlarging oilwells; and the invention consists in the application, to the shank ofthe bit, of a spring for crow d ing it against the well, and of a catch for holding the spring close to the bit during its application to the well.

Ain the drawing represents the shank of my improved tool, made with a screw, a, at its upper end, whereby it can be connected with suitable mechanism, and provided also with an outwardly-projecting steel bit, b, at the lower end.

To one face of the shank A is rigidly secured a spring, B, which, as lin Figs. l, 2, and 3, extends below the bit, or, as in Fig. 4, may be shorter than the same. In a mortise of the -shank A is pivoted a spring-catch, C, which can, as in Fig.

2, be hooked over a lip, d, of the spring for holding it close to the shank, and which, when thus holding the spring, lwill project with its outer end from the back ofthe shank.

When the tool is to be applied toa well the spring is held close to the shank by the springcatch C, so that the insertion of the tool will be facilitated. The projecting outer end ofthe catch at the same time holds the bit clear from the wall of thewell, preventing it from scraping while be-l ing let down. As soon as the device is being worked, when in its proper place the catch will releasethe spring, causing the same to crowd the bit against the wall of the well, as in Figs. 3 y

and 4.'

, For enlarging a well, the bit is used with the long spring, Fig. 3. In this case the spring will enter the smaller part of the well and cause the bit to work in the, larger vpart of the same upon the shoulder e.

For cleaning out wells the short spring is used,

B on one face having lip d, and extending below the bit, and with the pivoted spring-catch C with a hook thereon, all constructed. and arranged as and for the purpose specified.

` JAMES H. BOYD.

Witnesses G. M. HENRY,

J. M. BEST. `(124)

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