US1467604A - Fishing tool for deep wells - Google Patents

Description

Sept. 11, 1923.

' G. G. BOWEN ET AL FISHING TOOL FOR DEEP WELLS Filed Nov. 4, 1921 Patented Sept. 11, 1923.

UNH'EQ STATES atter Parana caries.

GEORGE G. BOWEN, CHARLEY A. DULEY, AND ROBERT ROSS, OF IVAN, TEXAS.

FISHING TOOL FOR DEEP WELLS.

Application filed November 4, 1921.

T all whom it may concern:

Be it known that we, GEORGE G. BOWEN,

' CHARLEY A. DULEY, and ROBERT B. Ross,

citizens of the United States, residing at Ivan, in the county of Stephens and State of Texas, have invented certain new and useful Improvements in'Fishing Tools for Deep Tells, of which the following is a specification.

The object of this invention is to provide a simple, inexpensive and efiicient tool by the use of which other tools, nuts or other objects which may have dropped to the bottom of a well may be easily found and reclaimed. The invention seeks "to provide a tool in' which a plurality of object-engaging members will be held separated while the tool is being lowered into the well but will be instantly released and caused to positively and effectually clamp the object when the bottom of the well has been reached sothat, upon withdrawal of the tool, the lost object will be lifted to the surface. One embodiment of our invention is illustrated in the accompanying drawing and will be hereinafter fully set forth.

In the drawings Figure 1 is a longitudinal section of our improved tool;

Fig. 2 is a side elevation of the same partly broken away;

Fig. 3 is a detail perspective view of one of the slips;

Fig. 4 is a detail perspective View of the slip-controlling head.

In carrying out our invention, we employ a socket 1 which is a cylindrical body having a closed upper end 2 and an open lower'end 3. the inner surface of the socket at the lower end thereof being flared to impart a bowllike form thereto. The socket is provided externally with a plurality of longitudinal grooves 4 which form water courses to permit the escape of oil, water or other liquid when the tool is being withdrawn so that its upward progress will not be unduly retarded, and thegreatestexternal diameter of the socket will be suchthat the socket will fit closely but slidably within the well in which it is to be used, it being our intention, in the commercial exploitation of the invention, to provide the sockets in various sizes corresponding to the standard diameters of wells. Arranged alternately with the grooves 4, openings 5 are formed through the wall of the socket and these openings provide seats Serial No. 512,857.

for the offsets 6 of the slips 7. The offsets, as shown most clearly in Fig. 1, do not entirely fill the openings 5 but are capable of pivotal movement therein and are retained within the said openings by pivot pins 8 inserted through the ribs or projecting por-' tions of the socket occurring between the longitudinal grooves 4 and through openings 9 in the offsets, as will be readily understood upon reference to Figs. -1 and 2. The portions of the slips below the offset 6 are tapered downwardly and at their lower extremities on their inner sides are provided with shoulders or teeth 10 to more effectually engage the object which is to be withdrawn from the well. The slips are arranged. to play in longitudinal grooves 11 formed in the inner surface of the socket 1 and the portions of the slips above the offset 6 are disposed at a slight angle to the lower portions thereof, as shown. The upper portions 12 of the slips are also out of alinement with the lower portions so that shoulders 13 are provided upon which the controlling head 14 may rest. The said head 14 is a wedge-shaped or downwardly'fiared body having slightly flattened surfaces 15 to engage the inner faces 'of the upper portions 12 of the slips and from the upper end of the said head, a shank 16 extends through the upper end 2 of the socket to engage in and be secured to the coupling 17 which may be suspended upon the end of a cable or may form the end of a jarring rod or other supporting instrumentality. In the drawing, the coupling 17 is shown as terminating in a threaded pin 17' to be engaged in a box on the lower end of the fishing rod. The shank 1G is of angular cross section through that portion which passesthrough the top of the socket and above the said angular portion is of circular cross section and threaded, as indicated at 18, whereby it may be readily secured in the lower end of the coupling.

- When the tool is to be lowered in a well,

the lower ends of the slips? are held apart, as indicated in full lines in Fig. 1, by fitting frangible pins 19 between the opposed slips so that the lower ends of the slips will be seated in the grooves 11. The tool is then to the slips so that .it will rest upon the shoulders 13 and will permit the upper ends of the slips to swing inwardly. When the tool reaches the bottom. of the well or the object which is to be withdrawn, the impact upon the object will break the pins 19', which may be thin pieces of light wood or other material, so that the lower ends of the slips mayqthen swing inwardly and engage the object, as indicated by dotted lines in Fig. 1., if a lifting force be then applied, the head 1% will be drawn upwardly and by reason of its flared or wedge-shaped con struction will spread the'upper ends of the slips, thereby forcing the lower ends of the same into positive gripping engagement with the object, The gripping action of the slips upon the object which is to be withdrawn from the well will be. increased as the tool moves upwardly owing to the fact that the entire weightof the socket and the slips; will be carried by the head and as the said weight tends to move the sockets and the slips relatively downward, the flared or wedge shape of the head will bind it against the upper ends of the slips forcing them outwardly and positively holding them against release.

Our improved tool is very simple in the construction and arrangement of its parts and is not apt to get out of order, while it may be easily operated and will be found highly efficient for the purpose for which it is designed, The external grooves in the socket will provide for the escape of water or other liquid which may be in the well above the tool and at the same time will reduce the surface of the tool in contact with the wall of the well and thereby minimize the frictional resistance and wear. the socket will be made of an external diametcr approximately equal to the internal diameter of the Well, the tool will be held positively to the center of the well and will, therefore, be guided with certainty over the object which is to be withdrawn and cannot pass to the side of the same so asto miss it.

Having thus described the invention, what is claimed as new is:

1, A tool for the purpose set forth comprising a socket provided with external longitw dinal grooves, a plurality of slips'pivotally ee-mos mitting the same to close and remain closed durin ascent of the socket.

2. & fishing tool for wells comprising a socket having a lower open end and having openings through its wall intermediate its ends, a plurality of slips disposed within the socket and provided with ofl sets pivotally seated Within the openings in the wall of the socket, a downwardly flared head arranged between the uppcr ends of the slips and having relative movement through the upper end of the socket, and. means above the socket connected with said head for suspending the tool.

3. A fishing tool for wells comprising a socket having an open lower end and provided with internal longitudinal grooves, a plurality of slips each seating in one of said internal grooves and pivotally fitted in the wall of the socket, frangible means for holding the lower ends of the slips expanded, a relatively movable head arranged between the upper ends of the slips and adapted to spread the same upon release of the said frangible means, and asuspending device connected with said head.

t. A fishing tool for wells comprising a socket having an open lower end, a plurality of slips pivotally fitted in the wall of the socket and having tapered lower ends, inwardly projecting shoulders on said slips above the pivotal points of the same, a downwardly flared head disposed within the socket and between the upper ends of the slips and engaging said slips to spread the same upon upward movement of the.

head, the head. normally resting on the inwardly projecting shoulders whereby to spread the lower ends of the slips during downward movement of the tool, a shank extendin from. the head through the upper end of tlie socket, and a suspending. mem ber secured on the upper end of said shank.

In testimony whereof we afiix our signatill

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