US1748980A - Fishing tool - Google Patents

Description

" Maifch 4, 1930. Y A. o. HAMBLEN I FISHING TOOL Filed Jun 6, 1928 I .n r 37 s H 'P atented Mar. 4, 1930 UNITED STATES;

PATENT OFFICE i rrsrtme 'roor.

Applieation filed. June 6, 1928. Serial No. 283,222.

My invention relates to a fishing tool for use in the recovering of lost pump and drill rods or pipes in the so-called driven wells.

The main object is to provide a tool which may be lowered over the rod to be pulled whereby it willgrip the said rod so that the same may be drawn from 'the well.

Another object is to provide such a device with a plurality of gripping members which will automatically swing togetherand grip the rod to be withdrawn substantially entirely around its circumference, thus providing a better grip upon the rod and allowing long sections of rod to be removed from the well.

' A further object is to provide such a tool which is easily removed from the rod when the same is withdrawn and which will be simple and strong in construction and ellicient in operation.

' With theseand other objects in view the invention resides in the novel construction and arrangement of the parts as'hereinafter set forth and claimed.

-In the drawing:

Figure 1 is a side elevation of my tool. Figure 2 is a vertical section of my tool,

two of the hinged jaw elements being shown partially swung outward and the retaining band removed.

Figure'3 is a plan view of my tool; and Figure 4 is a detail view in perspective of one of the gripping elements or teeth.

In practicmg my invention I rovide a main body portion 1, formed 0 suitable metal, which is provided with a reduced extension 2 and a medial bore 3, the said extension 2 having threads 4 to receive the internally threaded end of a pipe (not shown) used in lowering the tool into a well (not shown). I

Four jaws 5 are hinged to the lower margin 6 of the body 1 by conventional hinges 7 and these jaws arearcuate in cross section.

and'wedge shaped on a longitudinal section thru the axis of the assembly, as shown, so that the inner faces 8 thereof will form a conical or hell shaped mouth 9 for the reception of the rod to be pulled. The walls of the mouth converge upwardly as shown and so tend to guide the tool in lowering it over the upper end of the said rod bemg pulled. The jaws 5 are releasably held in the closed position by a circular retaining band 10 adapted to slidingly fit downwardly thereover andv seat against the outer arcuate shoulders 11. .A band 12 is fixed upon the extended portion'2 of the body 1- and a chain 13 has its ends secured in apertured tabs or ears 14 formed upon the bands 10 and 12 thus preventing the entire removal of the band 10 from the tool so that it might become lost, yet allowing it to be readily removed from engagement with the jaws 5 as will be understood. Gripping teeth or blades 15 are rigidly secured at their lower ends in any suitable manner, as by screws 16, to the inner faces 8 of the jaws 5 adjacent the lower margins thereof. The gripping teeth 15 are formed of heavy spring material and are adapted to converge inwardly. and upwardly towards their gripping ends 17 as shown, thesaid teeth being concavo-convex in cross section to conform closely to the contour of the rod which they engage. The upper ends 17 are beveled or sharpened somewhat to aidin obtaining a firm grip upon the rodv being removed and as shown in Figure 3 the same will be engaged or gripped at four diametrically opposite points which also facilitates the removal of the said rod.

In the use and operation of the device the tool is screwed on the end of a suitable pipe and with the hinged jaws 5 closed, is low-'85 ered into the well. The flaring mouth 9 will slip downwardly over the end of the rod to be pulled and the gripping teeth 15 due to their being made of spring material will spring outward allowing the said rod to pass 9 the teeth. Then by pulling upward upon the tool by the attached pipe (not shown) the gripping teeth will grip the rod sothat'it may be pulled from the well as will be understood. When the rod is withdrawn from 9 the well the tool ,is removed therefrom by sliding the band 10 upward so that the jaws 5 may be swung outward releasing the rod. 1 It is obvious that any number of hinged jaws may be used as desired.

Thus it will be seen that I provide a simple and easily operated tool which is very efficient in fulfilling its function.

While I have herein set forth a preferred embodiment of my invention, it is understood that'I may vary the structural details thereof, within the scope of the appended claims.

I claim:

1. In a tool ofthe class described, a circular body portion having a threaded extension for the reception of an operating pipe, and a passageway for a drill rod, a plurality of jawsgin of the body, the

hinged to the lower mar said jaws being arcuate 1n cross-section and Wedge shaped longitudinally the narrow end being turned downwardly, a band adapted to slidinglyfit over the jaws in the closed position and spring set gripping teeth or blades. secured to the inner faces of the jaws and converging inwardly and upwardly. Y

'2. In a tool of the character described, a body portion having a longitudinal'passageway for a drill rod, a band or collar fixed thereon, a plurality of jaw elements hinged-to the body, the said jaw elements being arcuate in cross section and wedge shaped with the narrow ends disposed downwardly, a retaining band adapted to slidably fit over the jaw elements, a connecting element connecting the said retaining band and the said fixed bandor collar, and spring set means upon the'jaw ele-- ments to grip a drill pipe or the like for pull.- ing the same, Y

3. In a tool of the character described,

body portion having a longitudinalpassageway for a drill rod, a plurality of jaws hingedly connected to the and inwardly and a plurality 0 spring set pipe gripping teeth or blades .upon the aws, the said teeth also converging upwardly and inwardly and being ooncavo-convex 1n cross section.

In testimony whereof I aflix my signature.

ALVA OTIS HAMBLEN.

to hold the same body portion, the inner ,faces of the said jaws convergintg upwardly

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