US872940A

US872940A - Tube-extractor for wells.

Info

Publication number: US872940A
Application number: US37877007A
Authority: US
Inventors: John A Holmberg
Original assignee: Individual
Current assignee: Individual
Priority date: 1907-06-13
Filing date: 1907-06-13
Publication date: 1907-12-03
Anticipated expiration: 1924-12-03

Description

PATENTBD DEC. 3, 1907.

J. A. HOLMBERG.

TUBE EXTRAGTOR FOR WELLS.

APPLICATION FILED JUNE 13,1907.

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JOHN A. HOLMBERG, OF LINDSBORG, KANSAS.

TUBE-EXTRACTOR FOR WELLS.

Specification of Letters Patent.

Patented Dec. 3, 1907.

Application filed June 13. 1907. Serial No. 378.770.

T 0 all whom it may concern:

Be it known that I, JOHN A. HOLMBERG, a citizen of the United States, residing at Lindsborg, in the county of McPherson and State of Kansas, have invented certain new and useful Improvements in Tube-Extractors for Wells and I do declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to improvements in tube extractors for drilled wells.

The object of the invention is to provide a device of this character by means of which the broken off sections of well tube may be quickly and easily extracted from wells.

I/Vith this object in view, the invention consists of certain novel features of construction, combination and arrangement of parts as will be more fully described and particularly pointed out in the appended claims.

In the accompanying drawings, Figure 1 is a side view of the device, parts of the same being shown in section; and Fig. 2 is a similar view of the device showing the manner in which the same is engaged with a broken well tube to extract the same.

Referring more particularly to the drawings, 1 denotes the extracting tool, which comprises a rod 2, having secured to its upper end a coupling or section'of pipe, 3,

threaded at its outer end and adapted to be.

screwed into the lower end of an operating tube or rod (not shown). The lower end of the rod 2 is preferably tapered to a point, as shown at 4.

Formed in one side of the rod 2, adjacent to its lower end is a wedge-shaped recess 5, the wider portion of which is disposed at its upper end, as shown. Loosely mounted in the recess 5 is a wedge-shaped extracting block 6, which is normally held in position in the recess 5 by means of a sleeve 7, as clearly shown in Fig. 1 of the drawing.

In operation the rod 2 is let down into the well so that the lower end of the same projects into the broken section of the tube. IVhen the lower end of the rod 2 enters the broken tube the upper end of the latter will engage the lower edge of the sleeve 7, and force the same upwardly on the rod 2 above the upper end of the wedge, which will permit the latter to slip downwardly in the recess 5 so that when the rod 2 is drawn upwardly, saidblock will be wedged or forced tightly between the inner wall of the recess 5, and the inner wall of the broken section of the tube, and will cause saidbroken section to be firmly gripped by the rod, and thus withdrawn from the well.

It will be seen from the foregoing that the heavier the section of tube, and the stronger the pull exerted upon the rod 2, the tighter will be the grip between the wedge and lower end of the rod with the tube.

Having described my invention, what I claim as new and desire to secure by Letters- Patent, is:

1. A well extractor having a gravity-actuated gripping device and a slidable. sleeve adapted to initially retain the latter retracted and, finally, to be engaged by the broken well tube for the release of said gripping device for its projection and-effective engagement with said broken well tube.

2. An extractor for well tubes comprising a rod having formed therein adjacent to its lower end a wedge-shaped recess, a wedgeshaped gripping block arranged in said recess, a sleeve slidably mounted on said rod to hold said wedgeblock in position, said sleeve being adapted to be engaged by the upper end of the broken Well tube to release said gripping block and thus permit the same to assume an operative position in engagement with the well tube, substantially as described.

3. An extractor for well tubes comprising a rod having a tapered lower end and a wedge-shaped recess formed therein adjacent to its lower end, a wedge-shaped gripping block arranged in said recess, a sleeve slidably mounted on said rod to normally hold said block in an inoperative position, and a coupling tube arranged on the upper end of said rod, substantially as described.

In testimony whereof I have hereunto set my hand in presence of two subscribing witnesses.

JOHN A. HOLMBERG.