US1477593A - Overshot fishing tool - Google Patents

Description

Dec. 1s 1923..

J. B. RElLLY -ET-AL OVERSHOT FISHING 4TOOL v Filedoct. 2o. 1921 ill.. Il

INVENTOR.

Patented Dec. l, i923.

retreat entre@ stares earner cerros.

JOHN REIILY, OF WH'ITTIER, AND CHARLES H. STONE, OF BREA, CALIFORNIA..

OVERSHOT FISHING TOOL.

Application led October 20, 1921.

To all whom it may concern:

Be it known that we, JOHN B. REILLY and CHARLES H. STONE, citizens of the United States, residingat Whittier and Brea, respectively, in the counties of Los Angeles and of Orange, respectively, and State of California, have invented new and useful Improvements in Overshot Fishing Tools, of which the following is a specification.

Our invention 'relates to an overshot ish'- -v ing tool that is, a tool utilized for engaging and removing from the lower portions of wells and drill holes, sections of. drill rods or tubes that have become broken or-disengaged from the upper portion of the drill rod or tube, the principal objects of'our in- .vention being to provide a relatively simple and practical tool that may be easily and cheaply produced, and which when lowered into a well or drill hole, will readily pass over the lupper end of the broken section" of drill -rod or tube, and said tool being provided withparts that will automatically engage with the broken rod or tube so as to firmly grip the same inorder that it may be elevated from the well or drill hole.

A further object of our invention is to construct an overshot fishing tool so that it may be easily and quickly disengaged Jfrom the hroken sections of tube or drill rod after ythe same has been elevated from the Well or drill hole. V

With the foregoing and other objects in view our invention consists in certain novel features oi' construction and arrangement of parts that will be hereinafter more fully' described and claimed and illustrated in the accompanying drawings, in which:

llig. 1 is a vertical section taken through the center of a fishing tool .of our improved construction, and showing the same posi- 'tioned in a Well or drill hole, and in engagenient with a member that is to be removed from said well or drill hole.

Fig. 2. is an enlarged horizontal section taken on the line 2-2 ofllig. l. fr,

Fig. 3. is an enlarged horizontal section taken on the line 3--3 of Fig. 2. v

Fig. l. is an enlarged horizontal section taken on the line 4-4 of Fig. l.

Fig. 5. is a perspective view of a rotatively mounted jaw carrying a ring that forms a part of our improved iishing tool.

Referring by numerals to the accompany- Serial No. 508,958.

threaded upper end of a ring 12, the opening' through which gradually increases in diameter toward its lower-end in order that said-ring may be readily passed over the upper end of the tube or rod that is to be engaged and removed from the well or drill hole engaged member may be shifted to the center of the Well or drill, a notch 13 is formed in the lower endl of the ring 12, and when the' tool is rotated, the shoulder at the end of thisnotch will engage the upper edge of the -tube or rod and force the same to the center of the well or drill hole.

Formed within the tubular member l0, and preferably at a point midway between its ends, is an annular shoulder 16, and positioned against the under side of said shoulder, and rigidlyixed in any suitable manner to member 10,'is a notched flange 17 that isprovided on its inner edge with a series of notches 18, spaced at equal distances apart, and one end of each notch being inclined to serve as a cam surface, as the :dange 17 is variably engagedl by jaws 20.

Loosely arranged within the lower portion of tubular member 10, between thevring '17 and the upper edge of ring l2, is a relatively short tubular member or ring 19 that serves as a carrier for a series of upwardly projecting rod or tube engaging jaws 20, and which latter are preferably formed of metal that is resilient to a certain degree.

rlhere are the same number of these jaws 20 as there are recesses in the notched flange 17, and the lower portions oir said jaws are loosely connected 'to ring ,19 by short lugs or pins 2l 'that project inwardly from the lower portions of said jaws into recesses 21a that are formed 1n the lower portion of sald rlng. ;l

In order that the upper portion of .theA

The lower portions of the jaws 20 lie immediately against the outer face of ring 19, and said jaws pass through notches 22 that are formed ina horizontally disposed flange 23 which latter projects outwardly.

from the upper portion of said ring.

Projecting outwardly from the lower edge ofring 19 is a flange 24 upon which the lower ends of the jaws 20 rest, and the outer face of' ring 19 between the flanges 23 and 24 gradually decreases in diameter toward the upper flange 23, so thatwhen the jaws are properly positioned on said ring, they occupy slightly inclined positions, with their inner ends inset with respect to their lower ends.

Formed in flange 24 is an arcuate slot or notch 25, and seated in the tubular member 41() and projecting into said notch or slot,

-is an opening 26, such construction providing means for limiting the rotary movement of the ring 19 and parts carried thereby, relative to the tubular body 10.

Formed in the flange 24 is a'recess 27 that is adapted to receive the end of a suitable tool 28 that is utilized for rotatin ring 19 within the tubular body 10, and rmed through tubular body 10 in the same horizontal plane with recess 27, is a short slot 29.

Arranged on t-he inclined out/er face of the ring 19, and preferably in an annular groove 30 that i's formed in said outer face, is al series'of short horizontally disposed sprin'jgs 31, each of which is secured at lits center by a pin or rivet 82, to the ring 19, and said springs are arranged sothat their ends occupy positions between an adjacent pair of the notches 22, and consequently the free ends of said springs bear against the inner faces of the jaws 20, tending to move thelatter to a disengaging position.

Vhen the fishing tool is to be inserted into a well or drill hole, a tool such as 28 is engaged in recess 27, and ring 19 'is rotated so that the intermediate portions of the jaws 20 bear against the edges of notched flange 17 between the notches 18 therein, and' thus said jaws may be maintained in inclined positions with their upper portions projecting inwardly toward the aXis of the tool, the notched flange 17 constitutinlg means, movable at will, for opposing the action of the mentioned springs and moving said jaws inwardly into an engaging position.

Tubular member 11 with the tool on the lower end thereof is now lowered into the well or drill hole, and said parts are manipulated so that the tool is engaged over the upper end of the drill rod or tube to be removed `from the well or drill hole, and said too-l is moved downward until the upper ends of the jaws- 2O engage beneath the shoulder of `a joint on the drill rod or tube as illustrated inFig. 1, and the parts are Lef/mea now lifted from the well or drill hole. To disengage the toolv from the drill rodor tube, ring 19 is rot-ated until the jaws 20 pass into notches 18, whereupon the free ends of springs 31 swing the jaws downwardly a short distance, consequently moving the upper ends thereof away from the shoulder-on the engaged rod or tube, thereby freeing the latter from the tool.

A fishing tool of our improved construction is of relatively simple structure, may be easily and cheaply produced, and is very effective` in performing its intended .functionS.

It will be understood that minor changes in the size, form and construction of the various parts of our improved fishing tool, may be made and substituted for those herein shown and described without departing from the spirit of our invention, the scope of which is set forth in the appended claims.

We claim as our invention:

1. In a fishing tool, a 'tubular body, ,a ring rotatively arranged within said body, a series of jawsl carried by and projecting upwardly from said ring, and springs on said ring beneath said jaws.

2. In a fishing tool, a tubular body, a notched flange on the interior thereof, a member arranged for rotary movement within said tubular body, and jaws carried b-y said `rotatively mounted member, and adapted to occupy the notches within said flange.

3. In a fishing tool, a tubular body, a notched flange on the interior thereof, a member arranged for rotary lmovement within said tubular body, jaws carried `by said roitatively mounted member, and adapted to occupy the notches within said flange, and springs onk said rotatively mounted member beneath said jaws.

L1. In a fishing tool, a 'tubular member, a ring arranged for rotation therein, a series of upwardly projecting jaws Vpivotally connecte-d to said ring, and means for moving said jaws from engaging position.

' 5. In a lishin tool, a tubular member, a rin arranged or rotation therein, and a series of upwardly projecting jaws pivotally connected to said ring, and disengaging springs-arranged on the rotatively mounted member beneath said jaws.

6. In a fishingtool, a tubular body, a

lring arranged for rotary 'movement within said body, a series of upwardly projecting jaws pivotally connected to said ring, and a notch ring within said tubular body above said rotatively arranged ring.

7. In a fishing tool, a tubular body, a ring arranged for rotary movement within said body, a series of upwardly projecting jaws pivotally connected to said ring, a notch ring within said tubular body above said rotatively arranged ring, and means for ias moving said jaws upwardly into the notches of said ring when the rst mentioned ring is partially rotated.

8. In a fishing tool, a tubular member, a series of resilient jaws pivotally arranged within said tubular member and extending upwardly therein, and a flange againstwhich the intermediate portions of said resilient jaws are adapted variably to en` ave. g fn testimony whereof we have signed our names to this specification.

JOHN B. .REILLY, CHAS. H. STONE.

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