US 1621714 A
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Description (OCR text may contain errors)
March 22 1927.
1,621,714 J. G. DYER ET AL BULL WHEEL ATTACHMENT Filed Feb. 12, 1926 Patented Mar. 22, 1927.
unites stares JOSEEH G. DYER AND JOHN C. TH
BULL-"WHEEL Application filed February Our invention relates to an auxiliary drum attachment for bull wheels and is particularly adapted for use in oil field work where rods or pipe must be withdrawn from and again lowered into the oil well.
In the operation of hoisting tubing or sucker rods, or even in drilling, it is customary to employ a bull wheel having a shaft or drum thereon upon which the cable is wound. This drum is of comparatively small diameter and when the bull wheel is employed in raising the pipe or rods from the well, the speed which may be attained is limited, due to the small size of the drum on the bull Wheel and the speed of the engine. Much time is, therefore, lost. in hoisting, due to the tact that where the load is light, as when the hoisting operations have withdrawn a portion of the load from the well, the speed cannot be increased.
It is an object of our invention to provide an auxiliary drum attachment for the shaft of the bull wheel whereby the size of the drum may be increased and the speed of operations be also increased sothat time may be saved in the hoisting of the rods or pipe from the well.
t is desired that the auxiliary drum may be so constructed as to be easily and quickly inserted in position upon the bull wheel when desired, and quickly clan'iped in operative position thereon. It is also desired that a plurality of speeds may be attained through the use of the drum, and the attachment is, therefore, adapted to change lrom one speed to the other, when desired, without diiliculty to the operator.
Further objects and advantages reside in the particular construction and arrangement of parts making up our attachment and will be set forth in greater detail herein.
Referring to the drawing, Fig. 1 is a side elevation of the auxiliary drum attachment. Fig. 2 is an end View thereof, certain parts being broken away for greater clearness. Fig. 3 is a side elevation taken at right angles to the view shown in Fig. 1. Fig. 4t is a front elevation of a bull wheel showing our attachment in position thereon. Fig. 5 is a reduced view somewhat diagrammatic and illustrating the manner in which the attachment may be placed in position upon the bull wheel shaft when it is desirable to use the attachment thereon. Like numerals of reference designate like parts in all the views.
1,621,714 PATENT QFFEE.
GMAS, or emanation, wroliimd.
12, 1926; Serial No. 87.8.44.
Our device is simple in its construction,
and we contemplate that it may be made of metal and cast the particular shape desired although we do not wish to be confined to this particular type of construction. When the drum is cast, however, it is contemplated that the interior will be cored out as much as possible to reduce the weight thereof and the walls of the drum are indicated in dotted lines to showthe manner in which the interior be hollowed out. This is not a material par-tot our invention, however, and it will not be necessary, therefore, to explain same in detail.
We contemplate forming an auxiliary drum which will be split longitudinally into two halves which may be indicated by the numerals 1 and 2. These twov halves, when assembled, form drum having two stages thereon, the first stage 3 being of small diameter and the outer stage 4 being of a larger diameter. Radial flanges 5 and 6 at each end of the attachment are provided as is common with hoisting drums. An intermediate radial flange 7 dividing the two stages of the drum is also provided. The two flanges 5 and 7 are also formed with diagonal slots Sand 9 therein to provide a space for the passage of the cable on to each of the drums, as will later more clearly appear.
The two longitudinal halves of the attachment are hinged together at the ends by means of links 10. The said links are comparatively short, having the ends thereof perforated to receive pivot bolts 11 upon which they secured in the two end flanges 5 and 6 of the drum in such manner as to allow the halves of the drum to swing thereon in an obvious manner.
On the opposite side of the drum, we provide clamping bolts 12. Said bolts are piv- I oted at one end 13 within a slot in the part 2 ot' the drum. The other end of the clamping bolt is threaded and provided with a nut 14.- thercon. The flanges 5 and 6 in which these bolts are secured are slotted at 15 to allow the bolts to be received therein and a notch 16 beyond the said slot is provided to receive the nut 14. The wall 17 of the notch or recess 16 is inclined upwardly, as shown in F ig. 2, so that when the nut 14 is clamped securely in osition, there will be no tendency of the c amping bolts 15 to move outwardly away from the clamped position. The interior opening 18 through the drum is made of such diameter as to fit upon the shaft of the bull wheel drum upon which it is to be mounted.
In order to raise the drum attachment thus provided and seat it upon the shaft of the bull wheel drum, we contemplate employing a hoisting device comprising a plurality of chains or cables 19 having hooks in the lower end thereof to engage within openings 20 formed in the central flange 7 of the attachment. These openings are indicated in dotted lines in Figs. 2 and 3. The openings are slightly above the center of the drum when the hinge 10 is placed uppermost and when the drum is thus raised it will be held in open position indicated in Fig. 5. It may then be swung over the drum of the bull wheel and lowered in place and quickly secured in position.
In the operation of the device, the cable 21, shown in Fig. 4: as being wound upon the shaft or drum 22 of the bull wheel, will be wound upon the shaft of the bull wheel when the hoisting operation is initiated. At this time the load upon the cable will be heavy and the operation somewhat slow, but as the pipe or rods are removed from the well and the load thereby gradually decreased, it will be desirable to speed up the operation as the load is lightened. The cable will then be passed through the slot 8 in the flange 5 of the auxiliary drum and will be wound on said drum until the load is further decreased so that the speed may be accelerated. lVhen this point is reached, the cable will be passed through the slot 9 in the flange 7 on to the larger drum 4; so that the speed of reeling up the cable will be further increased. It will, therefore, be obvious that the auxiliary attachment will act in the nature of a gear change upon the engine. It will allow the use of the ordinary engine whose speed of operation is exceedingly limited and will make it possible to reel up the cable and raise the load from the well with increasing speed as the load is lightened. A large saving of time in oil well operations may be thereby provided. It is found that the speed of operation may be increased by about 50% through the use of this attachment. WVhen the bull Wheel is used for ordinary operations, the drum may be quickly detached and removed from the bull wheel, and may be placed at some convenient point upon the derrick platform out of the way until it is again desired. The further advantages of this device will be apparent to those skilled in the art.
hat we claim as new and desire to protect by Letters Patent is:
1. A bull wheel attachment comprising an auxiliary drum having a longitudinal cylindrical opening to receive the drum of said bull wheel, said auxiliary drum being divided longitudinally into two sections, hinges connecting the sections at one side, detachable clamping devices at the other side, and means whereby said attachment may be elevated in open position. v
2. An attachment for the drum of a bull wheel comprising an auxiliary drum having a central longitudinal opening to receive said bull wheel drum, said auxiliary drum being longitudinally divided into two sections, links pivotally connecting said sections together at one side, and means to clamp said sections together at the other side.
An attachment for the drum of a bull wheel, comprising an auxiliary drum adapted to be clamped about the said bull wheel drum, said auxiliary drum having a plurality of stages with radial flanges at the ends of said stages, said flanges being slotted to allow the passage of a cable therethrough whereby the cable may be wound on either stage of the drum to obtain changes in the speed of operation upon said cable.
4:. An attachment for the drum of a bull wheel comprising a multiple stage auxiliary drum divided longitudinally into sections adapted to be clamped about said bull wheel drum.
5. An attachment for the drum of a bull wheel comprising an auxiliary drum divided longitudinally into sections hinged toget-her and adapted to be clamped about said bull wheel drum.
In testimony whereof we hereunto afiix our signatures this 27th day of January, A. D. 1926.
JOSEPH G. DYER. JOHN C. THOMAS.