US1028758A - Stuffing-box. - Google Patents

Description

G. W. MASON @E F. HAMMOND.

STUFFING BOX.

'APPLICATION FILED APM-11, 1911.

Patented June .4, 1912.

- TUNE STATES "PATENT OFFICE.' i

GEORGE W. MASON, OF MARSHALL, AND FRANCESCO HAMMOND, OF CASEY, ILLINOIS.

STUFFINGr-BOX.

Specification of Letters Patent.

Patented June 4, 1912.

To all whom 'it may concern:

Be it known that we, GEORGE W. MAsoN and FnANoEsoo HAMMOND, citizens of the 'United States, residing at Marshall, in the county of Clark, and Casey, in the county of Clark,` respectively, and State of Illinois,

have invented new and useful Improvements claimed.

In the drawings-Figure 1 illustrates a vertical longitudinal sectional view of the improved stuiiing box, showing the same attached to the tubing of an oil well. Fig. 2 is atop plan view ofthe same. Fig. 3 is a transverse sectional' viewupon the line 3-3 of Fig. 1.

The primary object of the invention is to provide a stuffing will effectively prevent the waste of oil while pumping, and which is so constructed as to receive and hold the-packing against the polish rod to prevent a leakage between the said polish rod i and the packing.

`As` is well known in the art, the packing in the stuffing boxes now commonly in use soon become worn, and it is necessary to vresort to a stop cock at the well to hold back the lead line pressure and in so doing it is a frequent occurrence for the bur7 or nut on the core of the stop l cock to become broken thus forcing out the core and consequently resulting in a big loss of oil before the pumper can get to a junction or to the power to shut. ofli `the wells that are pumping through this particular 'lead line, the o-il in the said lead line thereby being *-wasted before -a new stop cock can be attached. Our improvement is designed to prevent vsuch loss, said improvement embodying means which Obviates the employment of the stop cock in packing a well. The top follower'or head box for oil wells which of our device is held'and compressed by a weighted lever, commonly known in the trade as a calf sucker. These levers are quite frequently thrown ofil accidentally and a large loss of oil is the consequent result, especially when there are several wells connected to the same lead line.

Our invention, as above stated, is adapted to obviate and overcome the defects above enumerated, and in the drawings the numeral 1 designates the well tube,- and 2 the polish rod. The numeral 3 designates the stuffing box` `vThis box preferably comprises a cylinder and is provided with an inturned portion forming a shoulder 5 yfrom which extends a' reduced portion'G, which extends to the area of the mouth of the pipek 1, and the said extension isprovided with threads which are adapted to cooperate with similar threads upon the tube 1.l The box or casing 8 is provided, ata suitable distance above the shoulder 5, with right angularly arranged off-set or angular lugs 7. Each of these .lugs is provided with a threaded aperture and each of the said apertures is adaptl ed to receive the threaded stem 8 of suitable headed bolts 9. The lower portion of the 'boxor casing 3 is provided with an internal,

removable sleeve 10. This sleeve is, formed with an annular enlarged head 11, the latter adapted to have its inner face engaged withthe shoulder 5 of the' box or casingB. Positioned within the casing directly above the sleeve 10 and contacting with the head thereof is a compressible packing ring 12.

The bore or opening o'f the ring, as well yas the bore or opening ofthe sleeve 10 is of an area greater than that of the diameter of the' polish rod' 2. 'Arranged directly above the compressible packing ring 12 is a follower member 14; This member ,is adapted to snuglyA engage the circumferential surface of the box or casing 3, and has its bore or opening of an area suliicient to provide for the free movement The follower 14 may be'constructed of any desired material, preferably metal, the yperipheral wall formed to `present a substantially horizontal wall 16, and a downwardly inclined wall 17 forming a substantially V-shaped notch. The bolts 9 are arranged at an inclination corresponding to that of the inclined wall 17, and the said bolts 9 upon rotation are adapted to compress the of the polish rod 2. 'l

packing ring 12 to bring the same tightly into engagement with the polish krod 2 and the .circumferential surface of the box or casing 3.-

The numerals 18 designate a plural-ity of packing rings, preferably constructed of rubber which surround the polish rod and which are arranged directly above the follower 14.

The numeral 19 designates the upper follower for the box creasing 3.y This follower comprises an elongated body portion. The follower is further formed with an lenlarged head 21, the latter being adapted to support a weighted lever which compresses 19 on 18 in such a manner as to force 18 snugly against the polish rod and against the wall 33. It will be noted that the cap 19 really provides a follower for the compressible packing rings 18 and by reference `to Figs. 1 and 2 of the drawings it will be further noted that the central wall of the said follower cap is of a slightly larger area than the cross sectional area of the polish rod 2.

In the general construction of packing boxes for polish rods lemployed in connection with oil wells, as far as I am aware, no effective means have been provided for preventing the escape of oil from the tube after worn packing rings have bieen removed from the stuffing box to be replaced by new rings, and as a consequence, quite an amount of the fluid has been wasted. With our device, however, it will be noted that the packing ring 12 does not normally contact the surface of the polish rod 2, while the packing rings 18l at all times tightly engage with the said rod. When the packing rings 18 become worn and their removal is thus necessitated, the bolt members 9 are rotated so as to force the follower tightly against the packing ring 12 to compress the latter and to forcel the same tightly against the packing ring. When this is accomplished it is obvious that upon the removal of the follower cap 19 the worn packing rings 18 may be readily removed from the box or casing 3, and new rings replaced therefor. When the rings are in position and the follower cap readjusted upon the box or casing, the bolts 9 are rotated in anopposite direction so as to allow the compressible packing ring 13 to expand and to have its bore spread away from contact with the surface of the polish rod 2. It is also to be noted that all of the elements within the stuffing box 2 may readily be removed when desired. It will be noted that when the bolts 9 are rotated within the lugs 7V so as to bring their cont-acting faces away from the substantially horizontal wall 16 provided by the pockets 15, the said follower, as well as the ring 12 and sleeve 10 may be removed from the said box.

Having thus fully described thesaid invention, what we claim is:

1. A stuffing box for the purpose set forth comprising a cylindrical 'casing having its lower end reduced to provide a shoulder and a threaded extension, a headed sleeve within the casing and engaging the shoulder thereof, a packing ring arranged directly above theV sleeve, a follower member having its peripheral wall formed to present a substantially horizontal wall and a downwardly inclined wall arranged within the casing and positioned upon the said packingV ring, the casing being provided with a plurality of angularly projecting lugs, each of said lugshaving a threaded opening communicating with the casing, a plurality of packing rings positioned above said follower, a cap adapted to engage within the upper portion of the casing and to contact with the uppermost one of a series of packingrings positioned above said follower, and headed threaded bolts for the said openings and adapted to engage upon the substantially horizontal shoulder of the said follower. y y

2. A stuiiing box' for the purpose set forth comprising a cylindrical casing having its lower end reduced to provide a shoulder and an eXteriorly threaded extension, a headed downwardly inclined wall arranged within' K the casing, and positioned upon the said packing ring, the casing being provided with a plurality of angularly projecting lugs, each of said lugs having Va threaded opening communicating with the casing, a series of packing rings positioned above said floor, a cap 'adapted to engage within the upper portion ,of the'casing and to contact with the uppermost one of said series of packing rings positioned above said follower, and headed threaded bolts for the said openings arranged at an inclination to said downwardly inclined hollow of the follower, and adapted to engage the substantially horizontal shoulder. I

3. A stuffing box for the purpose set forth comprising a cylindrical casing having its lower end reduced to provide* aA shoulder and a threaded extension, a headed sleeve within the casing engaging the shoulder thereof, a packing ring arranged directly above the sleeve, a follower member having its peripheral wall formed to present a substantially V-shaped notch and positioned upon the packing rings, the casing being provided with a plurality of angularly projecting lugs, each of said lugs having a threaded opening communicating with the V-shaped notch of said follower, a cap adapted to engage within the upper portion In testimony whereof vwe affix our signaof the casing and to be Supported above the tures in. presence of two witnesses. said follower, and headed threaded bolts for GEORG-E W. MASON.

the said openings arranged at an inclination FRANCESCO HAMMOND. 5 to said V-shaped notch of the follower and Witnesses:

adapted to engage with one of the walls of ADA BUssELL,

the said V-shaped notch. GEO. G. ROBERTSON.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. C.

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