US1877684A - Puller - Google Patents

Description

Sept. 13, 1932. G. w. NICKERSON FULLER Filed July 27, 1951 2 Sheets-Sheet INVENTOR 62 71, ATTORNEY Sept. 13, 1932.

G. W. NICKERSON Filed July 27, 1931 2 Sheets-Sheet 2 Patented Sept. 13, 1932 p 1 enonqn winson nroxnnsoir,

or corurr, MASSACHUSETTS PULLER Application filed July 27,

My present invention has reference to a novel construction of pipe lifters and is primarily designed for pulling driven wells.

The object of the inventionis the provision of a device for this purpose that is lever operated, and which, through the reciprocatory movement of the lever in vertical directions will cause jaws to be brought against and to tightly grip the well so that when the outer end of the lever is moved downwardly the pipe will be raised and when the said end of the lever is moved upwardly the jaws will be brought out of engagement with the pipe in order to obtain a fresh grip on the pipe,"

the understanding, however, that the improvement is capable of extended application and is not confined to the exact showing of the drawings nor to the precise construction described and,ctherefore. such changes and modifications may be made therefrom as do not affect the spirit of the invention nor exceed the scope thereof as expressed in the ap pended claim.

In the drawings: I

Figure 1 is a side elevation of the improvement in use.

Figure 2 is a front elevation thereof.

Figure 3 is a sectional view approximately on the line 33 of Figure 1.

Figure 4 is a sectional view approximately on the line 44 of Figure 2.

Figure 5 is a face view of one of the removable aws.

Figure 6 is a plan view of another type of jaw.

In carrying out my invention I employ two facing heavy metal blocks 1, respectively.

1931. Serial 553,467,

Preferably the outer corners of these blopks H arecutat angles, as disclosed by the draw.

'ings, an'd the inner straight face. of each of the blocks is formedfrom its center, and for the maj or portion of its lengthwith a pocket 2, the inner wall'of the pocket being straight V and the sides thereof being arranged at a rightangle to the inner wall. The confronting faces of the'blocks to the opposite ends of the; pocket 2 are provided with round grooves or recesses 3. Each pocket 2 is designed to receive therein the straight "sides and inner wall of ajaw member 4. The outer faces 'of' the jaw members are concaved and are formed with'transversely arranged teeth 5. Jaws having concaved faces 7 of different widths maybe arranged in the pockets to grippingly engage different sized well pipesor tubes (land also ajjaw, such as illustrated by Figure 6 andindicated by the at p numeral -7-may' be employed. This iaw'ha's both of it sfac'es concaved longitudinally, the said concavities being of different depths and widths and the walls provided thereby are toothed. The jaw 7 may be thusireversely arranged in the pocket 2 to grippingly enf gage with different pipes or tubes Passing transversely and centrally throughthe body of the blocks 1, outward "of the pockets 2 there are pins 8, the said pins being held from longitudinal movement by cotter pins -9' that are passed'therethrough, and the cotter pins hold on the pins8 flat but heavy and'strohg'links'lO, respectively, The pairs of links on the sides of the cooperating jawc'arrying blocks are directed toward each other, but the outer ends thereof are in lapping engagement. Arranged over the outer faces of the respective links there are the lower ends of pairs of-heavy metal straps 11-11, respectively, and the headed pins 12 pass through openings in the straps and the links, the said pivot pins beingheld against longitudinal movementby cotter pins 13 that are passed through the outer ends thereof. Fixed on'each of the inner straps 11, at a arranged plates. 14. These plates are in the path of contact with the blocks when broughtthereagainst and designed to spread the blocks away from each other and consequently move the jaws out of engagement with the pipe 6: I

The upper or outer ends of the pairs of straps 11 are pivotally connected by pins 15, which are held from movement by rotter pins to heavy metal bars 16. The respective bars are arranged between the respective pairs-of straps 11 and between the bars 16 there is riveted or otherwise rigidly secured a pry bar 17, and this bar is of any desired length. The inner edges of the plates or bars 16, adjacent their pivotal connection with the straps 11 areprovidedwith alining semi-cylindrical openings 18 to receive therein a fulcrum pin 19 which is arranged in similar semi-cylindrical recesses on the upper beams 20 of a platform. [The beams 20 are held elevated by transverse blocks or beams 21. V

. The operator, after the device is arranged in a position to pull the pipe, arranges himself a comparatively great distanceaway from the blocks, that is, at the outer-end ofthepry bar andthis pry .bar is of a comparatively great length. A downward pressure upon the said outer end of the pry'bar will cause the straps 11 to swing the links 10 upwardly,

thereby forcing the bloclrs 1 toward each other and consequentlyforcing the gripping jaws into tight engagement with the pipe. Such movementelevates or pulls the pipe. The-pry bar is given avertical reciprocatory movement in orderthat fresh pulls and grips may be exerted by the gripping jaws, the outward movement of the pry bar being only slight and sufiicient to move the gripping jaws only a slight distanceaway from the pipebut when the jaws are to be separated or brought a distance'away from the pipe the pry bar has its outerend elevated to a determined extent to bring the plates .14: against the top-portions of the blocks 1 and to cause the said plates to exert a'downward pressure against the. blocks, thereby spreading the blocks awayfrom each other and bringing the gripping aws out of grip-' ping engagement with the pipe. F

It is believed the foregoing description will fully and clearly set forth the simplicity of the construction and the advantages thereof to those skilled-in the artto which such invention relates so that further detaileddescriptionwill not be required. 7 Y

Having described the invention, I claim: A holder forv the driven pipes of wells, comprising facing blocks having pockets therein at the confronting faces thereof, gripping jaws removably received in the pockets, links pivotally secured to the sides of the blocks and having their outer ends arranged inlapping relation, pairs of straps "contact ing with the outer faces of the links and gage with the pin and a laterally extending plate on each ofthe inner straps disposed in close proximity to the upper ends of the blocks, for the purpose set forth.

In testimony whereof-I affix-my signature.

7 GEORGE WILSON NICKERSON.

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