US1585481A

US1585481A - Well fishing tool

Info

Publication number: US1585481A
Application number: US726144A
Authority: US
Inventors: William J Flury; Lewis P Brandel
Original assignee: Individual
Current assignee: Individual
Priority date: 1924-07-15
Filing date: 1924-07-15
Publication date: 1926-05-18
Anticipated expiration: 1943-05-18

Description

May 18 1926. 1,585,481

W. J. FLURY ET AL WELL FISHING TOOL 2 Shets-Sheet 1 Filed July 15, 1924 ATTORNEY May 18 1926.

W. J. FLURY ET AL WELL FISHING TOOL Filed July 15, 1924 2 Sheets-Sheet 2 Patented May 18, 1926.

WILLIAIVI J. FLUBY AND LEWIS 1?.

FATNT @FFEQE.

BRANDEL, OF 'IAFT, CALIFORNIA.

VIELL FISHING TOOL.

Application filed July 15,

This invention contemplates the provision of a fishing tool, designed to recover pieces of tools, etc., dropped into wells, irrespective of the cross sectional configuration of the article to be recovered.

Tn carrying out the invention we contemplate the use of a pair of gripping elements yieldably mounted within a casing, for simultaneous movement both vertically and laterally against wedge shaped blocks secured within the casing adjacent the lower end thereof, so that said gripping elements are permitted free movement in a resultant quick action to effectively engage and grip the article to be removed.

The nature and advantages of the invention will be better understood when the following detailed description is read in connection with the accompanying draw ings, the invention residing in the construction, combination and arrangement of parts as claimed.

In the drawings forming part of this application, like numerals of reference indicate similar parts in the several views, and wherein:

Figure 1 is a view in elevation of the tool forming the subject matter of the invention.

Figure 2 is a bottom plan View.

Figure 8 is a vertical sectional view,

Figure 4 is a sectional view taken on line 44 of Figure 3.

Figure 5 is a fragmentary vertical se tional view showing how the article is gripped when the tool is lowered into the well.

Figure 6 is a perspective view of one of the gripping elements.

The tool forming the subject matter of the present invention includes a cylindrical casing 10 which may be of any suitable size without departing from the spirit of the invention, and the lower end of this casing is flared outwardly as at 11. Immediately adjacent the lower end the casing is formed with an internal annular shoulder 12 upon which reposes the lower ends of wedge shaped blocks 13 arranged diametrically opposite each other. These blocks are of dovetail formation in cross section and are utilized to guide the gripping elements in their movements in a manner to be hereinafter described. Each of these blocks is secured to the casing by means of a suit-- 1924. Serial No. 726,144.

able fastening element 14. Each block is also formed with an extension 15 depending from the lower end of the block and beveled as at 16, with the beveled portion arranged to form a continuity of the flared surface 11 of the lower end of the casing. Each block is further formed to provide a shoulder 17 upon which reposes one of the grip ping elements above referred to.

There are two of these gripping elements, each being of the construction or design illustrated in Figure 6, wherein it will be noted that one side of each element is roughened or formed with teeth 18 eXte11ding across the entire width of said element, the element itself being indicated at 19. Eaclr element is substantially of uniform width throughout its length, and is bifurcated at its upper end as at 20. Each element is also formed with an enlarged centrally disposed portion 21 arranged ver tically on the back or rear wall of the element, and this portion terminates short of the lower end of the element to form" a shoulder 22 which normally reposes upon the shoulder 17 of the adjacent block 13 above described. This enlarged portion 2i is of cross sectional contour to accommodate itself to the block 13 to provide a'dovetail connection between these parts. Each gripping element is suspended from a rod 23 the lower end of which is reduced to be received by the bifurcated extremity of the element and secured thereinto by means of a pivot pin 24. The corresponding upper extremities of the rods are pivoted to lugs 25 which depend from the bottom of a sliding piston 26 arranged within the casing 10, and which piston is influenced by a coil spring 27, one end of which bears on top of said piston, while the other end of said spring is received within the recess 28 of the bar 29 which has its lower end reduced and threaded into the upper end of the casing 10, as indicated at in Figure In practice the gripping element 19 normally reposes upon the shoulders 17 of the wedge shaped blocks 13, which arrangement is clearly shown in Figure 3, and wherein it will be noted that the said gripping elements are closely related. When the tool is lowered into the well to recover a broken rod or other article, and the rod enters the lower end of the casing, it strikes the gripping elements, forcing the latter upwardly against the tension of the coil spring 27, the piston 26 moving with the gripping elements in this direction as a unit, because of the fact that the space between said gripping elements is not large enough to receive the rod 31. However as the gripping elements are "forced upwardly within the. cas;- ing 10 while the latter is being lowered into the well, the said gripping elements ride along the blocks 13, and by reason of the shape of these blocks, the gripping elements are allowed to spread, or move away from each other a su'iiicient distance to allow the rod 31 to position itself between the gripping elements. As soon as the jaws are spaced :1 sutiicient distance for this purpose, the spring 27 which is now under tension forces the grippingelements downwardly to obtain an effective purchase upon the rod 31, both gripping elements being allowed freedom of movement under such circui'nstances. and movable sin'iultaneously under the action of the spring so that they both obtain the same grip upon the rod 3' Consequently when the tool is elevated or removed from the well it has such an effective grip upon the rod 31 i that there is no possibility of the rod slipping from between the gripping elements. In other words the more power or force exerted upon the hoisting cable the tighter is the grip obtained upon the rod 31. It'will be turt-herniore noted that inasmuch as the grip ping elements move simultaneously, one cannot remain up while the other is being moved downwardly, and that both of said elements are guided in their movements by reason of the dovetail joint between said gripping elements and the block 13.

Vhile it is believed that from the foregoing description, the nature and advantages of .the invention will be readily apparent, we desire to have it understood that we do notdiinit ourselves to what is herein shown and described, and that such changes may be resorted to when desired as fall within the scope of what is claimed.

What we claim is:

A tool of the character described, comprising a cylindrical casing having a flared mouth piece at one end, wedge shaped blocks detachably secured within the casing adjacent the flared mouth piece and formed with tapering guide slots, gripping elements having enlarged centrally disposed portions on one side thereoi adapted to be disposed within said guide slots whereby to slidably mount said gripping elements, said gripping elements having their upper ends bifurcated, a slide piston in the casing, lugs carried by the piston and arranged upon opposite sides thereojt, connecting rods ha ing one oi their ends pivotaily connected with the lugs and the other ends disposed within the pistons 01 the gripping elements and secured thereto, and a coil spring disposed for bending engagement against the piston and for the purpose set forth.

In testimony whereof we atiix our signatures.

WILLIAM J. FLURY. LEWIS P. BRANDED