US1785299A - Well-fishing tool - Google Patents

Description

Dec. 16, 1930. L. E. DAVIS 1,735,299

) WELL FISHING TOOL Filed Sept. 28, 1529.

' L.E". Dar/:17

INVENTOR A TTURNE Patented Dec. 16,1930 in v LOUISE; Davis, onsrgirr Application filedlSeptember The present invention is directed to 1m provementsin well fishing tools.

The primary object of the invention is to provide a device of this character which is of extremely simple construction and will the like in a well sothat the same can be conveniently withdrawn therefrom. j Another object of the invention is to provide a device of this character so, constructed 0 after more fully described, claimed and il-' lustrated in the accompanying drawingsfin.

thatobjectsvarying in size may be convenq iently gripped for removal from the well; f

Another object of the invention is-to p: r o vide a device of this character wherein the slips or jaws willibe positive ineoperation.

With these and other objects in view; the present invention resides in :the novel features of construction, formation, combination and arrangement of parts to be hereinwhich: V

Figure 1 is a central longitudinalsectional view throughthe device.

Figure 2 is asectional view on the line l of Figure 1. V V a Figure 3 is a sectional view on the line 33 of Figure 1. I a a The device comprises a tubular member 1 which consists of upper and lower sections2 and 3 and an intermediate section- 3, the intermediate section being provided with exteriorly threaded rims 4 and 5', for threaded engagement with the opposed ends of the sections 2 and 3. A l v The upper end of the section 2 is interiorly threaded, as at6, for receiving the plug? of the head 8, said thread havi-nga threaded shank 9 carried thereby for engagement with a rod or other device which serves to'lower the device into the well or lift the same therefrom. A The intermediate section 3' is provided with a bore 10 which opens at its upper end into the tapered seat 11, said section having a beveled lower edge. 12 to serve in guiding the tool into the bore 10 of the section 3. A pair of slip jaws 12 are mounted in the section 3 and are beveled for a 'portion of their length for engagement with the tapered seat 11,' said re r a effectively operate to engage broken rods or V cdownwardly. The spring will the object is comparatively. large indiameter it will engage the slip jaws 16 and as the de- L retained within the section 2;

The lower section '3 is provided with abeveled seat 15 andengaged therewith are the 0 slips 16, said slips having beveled surfaces 17 cooperating with the seat 15, and bearing upon'fthe upper ends of theslips a coil spring 18, the upperend of which bears against the lower end of the-section 3. This spring serves t'o'force'or urge the slips into engagement with the seat 17. i The-slips 16 are also provided with threads 19 and it will be observed that the diameter of the slip jaws '16" is greater than that of the' slip jaws 12in order that relatively large objects may be en.-

gaged by thejaws 16. Obviously, if the object is of adiameter which willpass freely between the slips'16, itwill be engaged by the slips 12. In this manner,robjects which vary indiameter may be removed from the well. 1 Brieflyjthe operationis as follows The device lowered into: the well and if vice is lowered, the weightthereof will cause the brokenpart which engagesthe slip jaws interiorly threaded-j as at 13,- for he reaper broken-pa t Resting" to move the same upwardly slightly so that they may spread,- during which time the 7 spring 18 will be contracted. As soon as the, j p

broken part isf-ully engaged with thesection 3 and the device is lifted; the spring will force the slips downwardly so that the beveled seat'thereof will contract the same to firmly grip the broken part. Should the brokenpart be of a diameter to pass through the slips 16, it will be engaged in a similar mannerbythe slips 12. V v 7 From the foregoing, it is thought that the operationand many advantages of the herein described invention will be apparent to those skilledin the art withoutfurther description and it will be understood that various changes in size, shape, proportion and minor details of I construction may be resorted to without de-* parting from the spirit or sacrificing any of p the advantages of the invention.

What is claimed is: 7 IA Well fishing tool comprising similar upper, lower and intermediate tubular sections of like external diameter and having openings 'thereth-rough of difi'erent diameters, the intermediate and lower sections ,';having. the '7 bottom portion of the'openings of uniform 1 diameter and the part immediately therev above tapered, slips in'th"-respec tivesections 7? having their lower ends taperedandtheir p j V upper ends of uniform diameter, 'thesli'psin" the intermediate sectiqnbeing of,lessexternal 7:.

15 diameter than the slips in 'thelovver section,

an'dsp'rings coasting With,.the-1slip s to' exert 1 "a" downward pressure thereon tohold their tapered endsinthetaperedopenings of the E .1

respective sections.

1 p In testimony fwhereof I afiiiz my signature. I

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