US974760A

US974760A - Electric fishing-tool.

Info

Publication number: US974760A
Application number: US54157710A
Authority: US
Inventors: Harry Eastwood
Original assignee: Individual
Current assignee: Individual
Priority date: 1910-02-02
Filing date: 1910-02-02
Publication date: 1910-11-01
Anticipated expiration: 1927-11-01

Description

H. EASTWOOD. ELECTRIC FISHING TOOL. APPLIOATION FILED PEB. 2, 1910.

K 974,760. Patented N0v.1,1910.

HARRY EA-STWOOD, 0F FRESNO, CAL'IFORNIA,

ELECTRIC FISHING-Toor..

Specification of Letters Patent.

Patented Nov. 1, 1910.

' Application filed February', 1910. Serial No. 541,577.

To all wwm 'may con/:emr f 'Be it known that l, HARRY Eas'rwoon, a citizen of the. United States, residing at Fresno, in the county of Fresno and State of California, have invented new and use ful Improvements in Electric Fishing-Tools, ot' which the following is a specification.

This invention relates to fishing-tools such as are employed in well-drilling operations in recovering drill bits, reamers and the like which have been lost in the bottom of the well. n

lt is the object of this invention to provide a simple, practical fishing-tool in which electro-magnetic means are. employed Jfor engaging or picking up and recovering the metallic implements or broken parts lost in the well.

The invention consists. of the parts and the construction and combination of lparts as hereinafter more fully described and claimed, hawinol reference to the accompanying drawings, in whichl Y Figure is a vertical section of the invent-ion on the line X-X, Fig. 2. Fig. 2 is e a cross-section on, the line Y-.Y, Fig. l.

in each of which a pair of the eleetro-1nag Fig. 3 is a cross-section on Athe line Z-Z, Fig. l.

In the drawings, A is a waterproof nonmagnetic casing in` which is contained a series of soft iron cores 2 suitably wound with wire at 3 to form electro-magnets. The cores Q, in this case Jfour in number, are mounted in a sott ir0n,' tapered armature plug t at their lower ends, which plug is divided `centrally by a non-conducting plate 5 so as to orni a pair of armature sections,

nets, composed of a core 2 and helical wire 3, are mounted. The upper ends of the cores 2 are mounted in a non-conducting disk 6 which lits into the upperend of the casing A. 7 are draw-bolts which have one of their ends threaded into the tapered plug or ar mature sections 4, and, extending upward, pass` through the disk 6 and upper end of the casing A. The upper ends of the bolts 7 are threaded to receive nuts 8 which on be-k ing screwed onto the bolts 7, draw the tapered plug Il tight into the correspondingly tapered lower yend of the casing A, so as to form a water-'tight joint at this point. A rod 9, solid or tubular, passes lthrough the upper end of the-casing A and is ,threaded into the disk 6; a suitable rope or cable (not shown) being attached to this rod, by means of which the tool is manipulated in the well. As a means ot rendering the upper end ofthe casing water-tight, l employ a conical cap 9 which is provided with a flange l0 on its loweredge and closely lits the rod 9 at its apex, through which the rod extends.

The cap is adapted to be secured to the' end'ot the casing by suitable means, as the screws ll which pass through the iange l() and are threaded into the casing A.

gasket 12 is interposed between the flange 10 on the cap 9 and the casing A, so as to make a.\.atertight liointat this point. To insure that no liquid can enter the casing A along the rod 9, a collar 13 is secured-to the 'latter so as to forni a shoulder" which is adapted to bear againstthe upper edge of the cap 9 g a gasket ll being interposed between the cap 9. and the shoulder or collar -13so that by screwing the rod 9 further into the disk G a tight joint will be obtained. The terminals of the magnet wires 3 pass through suitable bores in the disk 6 and connect to a plug l5 which screws into a socket 1G on the cap 9. Plug 15 is con nected to suitably insulated feed wires l? which lead to any desired and suitable source of electrical energy; and the usual switches (not shown) are provided for cutting oli and 'controlling Vthev circuits affecting the coils 3. i I

In operation, the tool is lowered int-o a well in any suitable manner. Then the desired point -is reached the Vlarmature plug 4l is magnetized by directing a current ofv tieles, on being picked up,inay be drawn out of the well with the fishing-tool and removed.

In event the lost tool is ot considerable length and shouldzbe disposed at an angle or crosswise of .the well bore beneath the well casing, thereby rendering it impossible to withdraw it in that position, one side only of/the armature 4 is magnetized, and to such extentvthat it will not havesuliicient power to entirely lift the tool, but will allow the latter to slide moreor lesson the magnetized surface of the' armature. In this manner, .when the tool is attracted by the armature,

rits heaviest endwill Vtend to keep its position,

and as the armature 4 is gradually lifted upward,rthe lighter end of the tool will tendy proof casing with a removable, sectionalarmature plug in the bottom, and means within the casing for magnetizing said armature sections.

2. A fishing-tool comprising a non-magnetic tubular casing having an armature plug at one end, electro-magnets connected with said plug and housed within the casing, draw-bolts passing through the casing and seated in the plug to hold the latter in position, and electrical connections with the magnets extending out exterior of the casing.

3. An electrical fishing-tool comprising a non-magnetic water-tight casinghaving at its lower end a removable, tapered armature forming a closure, and electro-magnetic means housed in the casing and connected with said armature.

4. An electrical ishing-tool comprising a non-magnetic water-tight casing having at its lower end a removable, tapered armature forming a closure, and electro-magnetic means housed in the casing and connected with said armature, said armature made in -sections insulated from each other and casing, the lower end of which is provided with a removable, tapered armature plug, said plug made 1n sections, an electro-magnet for each armature section, said magnets housed .within the casing, and draw-bolts passing through the casing and seating iu the armature sections to hold the latter in place.

7. A fishing-tool comprising a water-tight tubular casing having a removable, tapered armature plug fitting its lower 4end, a rod passing through the top of the'casing and screwing into a block within the casing, a conical water-tight cap fitting around the rod and over the top of the casing, with means for forming a tight joint, and electromagnets within the casing and connected with the armature.

8. A fishing-tool comprising a watertight tubular casing having a removable, tapered armature plug fitting its lower end, a rod passing through the top of the casing and screwinginto a block within the casing, a conical water-tight cap fitting around the rodand overthe top of the casing, with means for forming a tight joint, electromagnets within the casing and connected with the armature, said armature made in sections insulated from each other, and means for holding the sections in place.

9. A iishing-tool comprising a water-tight tubular casing having a removable, tapered armature plug fitting its lower end, a rod passing through the top of the casing and screwing into a block within the casing, a conical water-tight cap fitting around the rod and over the top of the casing, with means for forming a tight joint, electromagnets within the casing and connected with the armature, draw-bolts connected with the armature passing through the cas-` ing, and means outside the casing acting on the draw-bolts and coacting therewith to hold the armature in position. v

In testimony whereof I have hereunto set my hand in the presence of two subscribing witnesses.

HARRY EASTWOOD.

lVitnesses J. W. HANNER, VILLARD G.CRAM.