US1810978A - Weldless elevator link - Google Patents

Description

June 23, 1931. G. w. MOORE 1,810,978

WELDLESS ELEVATOR LINK Filed Sept. 23, 1929 I/V Vi/V TOR. Giana: M 110071;. BX X ITTOHMEX Patented June 23, 1931 UNITED STATES GEORGE w. MOORE, or LONG BEACH, CALIFORNIA WELD-LESS nLnvA'ron LINK original application filed November 18, 1927, Serial No. 234,228. Divided and this application filed September 23, 1929.

An object of my invention is to provide a link for tubing or casing elevators which is simple to manufacture, and one which will not readily break under severe strain. Here- ;tofore elevator links have been formed by bending a rod at its center, the free ends then being brought together and welded, the

' joint thus occurred at the point where the hook engaged the link, and under severe strain this weld would frequently break. The breaking of the link is extremely danger one to the workmen, and also may severely damage the well, by reason of the fact that the tubing or casing drops down into the hole.

Another object of my invention is to provide a weldless link which is formed with a very few operations, such operations being simple and quickly performed.

A further object of invention is to provide a weldless link with a hand grip thereon so that the operator can more readily grasp and manipulate the link.

Other objects, advantages and features of invention may appear from the accompanying drawings, the subjoined detailed descrip tion and the appended claims. I

This application is a division of my copending application on \Veldless elevator link, Serial Number 234,228, filed November 18, 1927.

In the drawings: 7

Figure 1 is a side elevation of the rod from which the link is made.

Figure 2 is a side elevation of the rod in the next stage of manufacture. V

Figure 3 is a side elevation of the rod in the third step of completion.

Figure l is a plan view of the completed rod.

Figure 5 is a side elevation of the same.

Figure tl is a side elevation of my links in position on an elevator.

Referring more particularly to the drawings, my weldless rod is formed in a series of steps starting with a rod 1, of substantially uniform diameter through its length. This rod being then moved through the rollers forming the structure as shown in Figure 2,

consists of a central circular cross section 2,

Serial No. 394,671. I

theends 3, 4, being'of substantially the same diameter as the rod 1, with which I-start.

During this rolling operation, the rod is elongated to the required length, which length varies from 6 feet to 8 feet, more or less. The rolling operation is socontrolled that each rod{ is made exactly the same length; this insures a uniform strain onthe two links which support the elevator.

The next step consists in flattening the ends 3, 4, as shown at .5, 6. Thecentral section'2 remains undisturbed. The next operation consists in cutting the openings 7, 8 to form the eyes 9, 10. The Opening 7, which extends over the elevator lugs is smaller'in size than the opening 8, which is engaged by the block hook. That is the opening 7, is smaller in dimension along-the longitudinal axis of the'link than the openmg 8. J

V The upper endof the eye 10 is flattened as at 11, and is bent upwardly at an angle.

The purposefo-f the flattening is to provide more metal along the line of greatest strain,

and the bending is to enableithe two links to fit more closely" together when in useo an elevator as shown in Figure 6. I

The central:- section 2 tapers gradually outwardly into the'eyes 9, 10, so'thatno abrupt angles are formed across whicha break can occur. The gradual, tapering'distributes the strain more equally and there is less likelihood of a" fracture occurring at the point. where the eyes, and the central section'come together.

It is obvious that the above described method can be accomplished by forging the rod into shape as well as by rolling the same, and also it may be desirable to make the end I 3 slightly smaller in diameter than the end 34 4, by reason ofthe fact that the eye 9 is above thefloor of the derrick on a specially provided platform, and as the elevator passes him, he reaches out and grasps the links to pull the pipe over into the rack. To provide a convenient hand grasp, a pair of loops 1212 are formed one on either end if of the link, and these loops may be either welded to the link or may be integrally formed thereon during the manufacturing process. A cable or rod 13, or any other rigid or flexible member, is secured to both of the loops and extends between them, thus forming a hand grasp for the operator so that the links may be more readily manipulated.

In the rolling operation, and in the cut- 7 ting of the eyes 910, it is desirable that the cross sectional area of the central section 2 be about the same as the sum of the cross sectional area of both sides of the loop,

thus making all parts of the link substantially the same in tensile strain.

Having described my invention, I claim:

1. A weldless elevator link for oil well elevators formed of a single iece of metal, said link comprising a straig t central section, enlarged ends on said piece, eyes'cut in said enlarged ends, a loop on said link on both ends thereof and a hand grasp secured to said loops.

2. A weldless elevator link for oil well elevators formed of a single piece of metal, said link comprising a straight central section, enlarged ends on said piece, eyes out in said enlarged ends and handlgrasp means extending substantially the lengthof said link, and means securing said hand grasp means to the link.

3. A weldless elevator link for oil well elevators formed ofa single piece of metal, said link comprising a straight central section, enlarged ends on said piece, eyes'cut .in said enlarged ends, a loop on said link on both ends thereof anda cable secured to said loops whereby a hand grasp is provided.

4:. A weldless elevator link for oil well elevators formed of a single piece of metal, said link comprising a straight central section, enlarged ends on said piece, eyes cut in said enlarged ends, one of said enlarged ends being flattened and bent at an angle with the centralsection thereof, hand grasp means extending substantially the length of said link, and means securing saidlink and the hand grasp means. a

In testimony whereof, I affix my signature.

GEORGE W. MOORE.

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