US832920A - Fishing-tool for wells. - Google Patents

Description

PATENTED 001 .9, 1906. J. MORROW.

FISHING TOOL FOR WELLS. APPLICATION FILED MAR. 28. 1904.

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N0. 832,920. I PATENTBD OCT. 9, 1906. J. H. MORROW. FISHING TOOL FOR WELLS. APPLICATION IILEDYMAR. 2a. 1904.

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UNITED STATES -PATENT OFFICE.

JOHN H. MORROW, OF CHICAGO, ILLINOIS.

FISHING-TOOL FoR' WEQLLS.

Specification of Letters Patent.

Patented Oct. 9, 190

Applicatio fil d March 28,;1904. Serial No. 200.260.

pertains to make anduse the same, reference ein had to the accompanying drawings, whic form a part of this specification. I

My invention relates in. general to grappling-tools, and more particularly to a tool or removing pipes, rods, or other articles from Artesian wells.

In the boring of Artesian wells it frequently happens thattools, rods, or sections of pipes become detached in the well and muchtrouble is experienced in their removal owing not only to the difficulty in gripping the o bject, but also to the limited space requiring the use of a small toolwhi'ch as heretofore constructed has been-,insuflicient in structural strength to lift heavy objects.

The primary object of my invention is to provide a gra plin'g-tool which may be lowered into a we 1 and causedto engage any 0b- 1 ject therein that it is desired to remove from the well and which may be at all times controlled by the o erator, so that it may be disengaged from t e object, if desired. A further object of my invention is to provide a grappling device which will be simple in construction, inexpensive in manufacture, and eflicient in use.

My invention, generally described, consists in a pawl-carrier, means for lowering the carrier into a well, one ormore verticall swinging pawls pivotally supported in soc ets formed'in the carrier, means for swinging the pawl relatively to the, carrier, and a sup-' port'on the carrier below the pawl to relieve the strain on the pivot of the pawl when an object is being elevated.

My invention will be more fully described hereinafter with reference to the accompanying drawings, in which the same is illustrated as embodied in two convenient and practical forms, and in which Figure 1 is an elevational view, parts being shown in section; Fig. 2, a view similar to Fig. 1, showing the pawls in engagement with the surrounding pipe; Fig. 3, a sectional view on line 3 3, Big. 2; Fi 4, an elevational view of the tool remove from the pipe;

" strain upon the pivot.

Fig. 5, a vertical sectional view. of a modified embodiment of my invention, Fi 6-, a vertical sectional view in a plane at rig t angles to Fig. 5; and Fig. 7 a transverse section on line77,Fig. 5. 7' I Similar reference characters are used to of the drawings.

Referring more particularly to Figs. 1, 2, 3, and 4, reference-letter A designates a section designate similar parts in the several figures-- of pipe which is to be' engaged and elevated v by the grappling device. B desi nates a carrier for the pawls C- and C T e carrier B may conveniently consist in a solid metal post, at the lower end of which is a radiallyprojecting shoulder b the under side of which is provided-with a conical surface-B b designates a coupling in screw-threaded enga ement with the upper end of the car:

rier and by means of which the carrieris.

lowered into and elevatedout of the well.

The pawls C and C are seated in sockets formed in the carrier in any desired mannersuch, for instance, as by'milling. The'sockets B and B are out ofalinement and overlap at their'inner ends. C designates a pivotal rod extending through holes -in the over-- lapped inner ends of the pawls and supported at its opposite ends in the carrier. T e holes in the pawls through which the pivotal rod extends are sufficiently lar e to permit the inner ends of the pawls to ear against thewalls of the sockets, thereby relieving the The outer ends of the pawls are beveled, so as to form sharp edges adapted to bite into the inner wall of the surrounding pipe. Any suitable means may 'be provided for controlling the vertical move ment of the pawlssuch, for instance, as chains 0 and c which extend from holes near the outer ends of the pawls and are "when the tool has been lowered the desired de thinto the well. v I

designates a loose ring surrounding the carrier B immediately below the pawls and resting upon the shoulder bi. The operation and manner of using the embodiment of my invention above described are as follows: When it is desired to remove from the well a section of pipe A, the

tool islowered into the section,- the pawls C and C being preferably held in the elevated osition shown in dotted lines in Fig. 1.- hen the tool is in position within the pipemay be removed from t e .well.

- section, the tension on the chain c is discontinued, thereby allowing the pawls tofall by gravity into the position shown in full lines in Fig. 1. The'carrieris then pulled u wardly through power applied to any suita le connecting means united to the coupling 6. The upward movement of the carrier causes the ends of the pawls to bite intothe pipe,

Shtlfi) I i as s own at a a in Fig. 2, thereby securely carrier serves to guide the tool into the pi' e as it assumes an inclined position. when t e portion thereof which projects around the shoulder b rests upon the edge of the ipe, and thereby facilitates the insertion o the tool in the pipe.

In Figs. 5, 6, and 7.1 have illustrated a modified embodiment of my invention particularly adapted for removing rolds or small pipes from a well. In such figures A desig hates the pipe which forms the permanent wall of the well, while E designates a rod which it is desired to remove from the Well. F is a pawl-carrier consisting in a horizontal ring and an upwardly-projecting portion F rigidly secured to the ring. f 2 designates a rod secured to the ortion F of the carrier by means of which t e carrier is lowered into and elevated from the well.

The inner surface of the tin of the carrier iscut away to form an annu ar shoulder f,

which serves as a seat for a die G. The die G is removably held within the ring of the carrier by any suitable means-such, for instance, ascl'ai'np-screw's g. The die G is pro- 'vided with a central opening, at one side of which is a sharp biting edge G.

H designates a vertically-swinging pawl pivotally sup cited in a socket F, formed in the carrier. designates a ivotal rod about which the pawl swings, t e hole through which the rod extends being sufficiently large to permit the end of the pawl to bear against the wall of the surrounding socket. The portion of the die G beneath the pawl is provide'd with a recess which alines with the lower edge of the socket F in the carrier, so

that when the pawl assumes a horizontal position itwill be supported upon the die, as

clearly shown in Fig. 5.

Any suitable means m-a be provided for swinging the pawl'relativ'e y to the carriersnch, for instance, as a chain h-which extends from the pawl, through an opening f in the carrier, and thence upwardly to the surface of the ground.

The operation of the modified embodiment of my invention above described is as follows: The carrier is lowered within the pipe A,

forming thewall of the well by means of the rod f When the carrier'reaches the point where the rod E is located, the u per end of then be lifted out of the well and with it the It will be ,noticedthat in both of the illustrated' embodiments of my invention a pawl is seate'dwithina socket ina carrier and engages the wall of the socket and is provided with a support to relieve the strain upon the pivot of t 'e pawl when it engages an object.

It will be further 'ohserved that in both embodiments of my invention the pawl is at all times under the control of the operator,- so that it may be lifted upwardly and disengaged from the object should it be found necessary to do so.

In the embodiment of my invention (shown in Figs. 5, 6, and7) a set of dies G, having graduated sizes of openings therethrou'gh, may be employed, so that by changing the die the same tool ma be used for removing pipes or rods of di erent diameters. The die, G cooperates with the pawl H to cause the latter to tightly grip the pipe or rod E, while in the embodiment of my invention illnstratedi'n Figs. 1 to 4 each pawl cooperates with the other to cause it to tightly en'- gag e the inner surface of the tube.

'rom the foregoing description it is evident that I have invented an improved lifting-to'ol especially adapted tor use in removing. ipes or rods from Artesian wells and whic is simple and strong in construction and ma be readily operated to an object a tightly hold the same whi e'being elevated out of the Well.

While I have described more or less precisely the details of construction, I do not wish to be understood as limiting myself thereto, as I contemplate changes in form, the proportion of parts, and the substitution of 'equiva-lents'as circumstances may suggest or render expedient without departing from the spirit of my invention.

Having now fully described my invention, what I claim as new, and desireto secure by Letters Patent, is

1. In a lifting-tool, the combination with .a Garden 'of "a pawl vertically, movably supported within a socket in said carrier and ada ted to bear against the inner wall of the socket, means for raising and lowering said carrier, means for moving the pawl relatively to the carrier, and cooperating m'echaigi'sm for causing the pawl to tightly grip an o ject.

2. In a lifting-tool, the combination with a carrier, of a pawl vertically movably supported upon the carrier, means for raising and lowering the carrier, means for moving the pawl relativel to the carrier, cooperating mechanism or causing the awl to ti htly grip an object, and a shoul or upon w ich the pawl is supported and which relieves the strain upon the pivot of the pawl when an object is lifted.

3. In a lifting-tool, the combination with a carrier, of a vertically-movable pawl loosely supported within a socket in the carrier, and adapted to engage the inner "wall of the socket, a pivot-pin ext Ending loosely through a hole in the pawl, means for raising and lo wering said carrier, means for moving the pawl relatively to the carrier, and ooopera't ing a mechanism for causing the pawl to tightly grip an object.

4. In a lifting-tool, the combination with a carrier; of two oppositely radially projecting pawls vertically movably supported within sockets in the-carrier, the inner ends of the.

pawls adapted to bear against the inner walls of the sockets, means for raising and lowering the carrier, and means for mo ving' the pawls relatively to the carrier.

5. In a lifting-tool, the combination with a carrier having a radially-projectingshoulder,- of a pawl vertically movably supported upon the carrier, means for raising and lowering the carrier, means for moving the pawl relatively to the carrier, cooperating mechanism for causing the pawl to tightly grip an object, and a ring loosely supported upon the shoulder of the carrier and projecting radially around the carrier upon which the pawl rests and which cooperates with said shoulder to relieve the strain upon the pivot of the pawl when an object is elevated.

6. In a lifting-tool, the combination with a carrier having a radially-projecting shoulder, of two oppositely radially projecting pawls vertically movably supported within sockets in the carrier, means for raising and lowering the carrier, means for moving the pawls relatively to the carrier, and a ring loosely supported upon said shoulderand projecting radially around the carrier upon which the pawls rest and which cooperates with saidshoulder to relieve the strain upon the pivot I of the pawls when an object is'elevated.

7. Ina lifting-tool, the combination with a carrier having overlapping radially-project ing sockets'therein, of two oppositely-pro- I jecting pawls supported within said sockets, a rod extending loosely through holes in the inner ends of the pawls, means for raising and lowering the carrier, means for moving the pawls relatively to the carrier, and a ring loosely supported by and projectin radially around the carrier upon which t e pawls rest when anobject is lifted. i

In testimony whereof I sign this specification in the presence of two witnesses.

JOHN H. MORROW. Witnesses:

GrEo. LjWrLrnNsou, C. C. CUNNINGHAM.

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