Патент USA US2113098код для вставки
Patented Apr. 5, »193s ’ 2,113,098 UNITED STATES PATENT oFFlcE 2,113,998 PAcxER Percy B. Skinner, Tulsa, Okla.> applicati@ ,my 5, 1935, serial No. 29,933 (Cl. 286-31) Figure' 3y is a transverse, yvertical ì sectional ' This invention relates to’new and useful im- ’ 2' Claims. provements in packers. view taken on the line 3-'-3 of Figure 1, Figure 4 is a transverse, vertical, sectional view , One object of the invention is to provide an of a stuffing box having a plurality, of said rings , improved packer which is particularly adapted mounted therein, and showing said rings in a 5 5 for use in packing oif the polish rod of an oil well, or other element. . normal position, and- ` Í -. , ' Figure 5 is a view similar to Figure 4 and An important object of the invention „ist to rality of superimposed packing rings which are showing the packing rings distorted into packing engagement with the polish rod., arranged to surround an element extending through the packer, the rings having their upper cylindrical body, or housing which is providedy provide an improved packer including a plu In the drawing, the numeral I0 designates a . and lower peripheral surfaces convéx whereby with an axial bore Il. 1 The lower end of the bore ’ the line of contact between- said rings ,is oom visreduced at I2 to form an internal, annular » paratively small, and also whereby annular 'shoulder I3 Awithin the body. The upper end ofl the bore is vprovided with screw-threads I t, which' provides ample distortion Vspace when whereby a ,follower I5 may be threaded there- “ spaces or channels are formed between the rings, pressure is applied to said rings to move them into packingî relation with said element. Another object of the invention is to provide ’ an improved packer including a plurality of 20 superimposed resilient rings adapted-to engage the outer surface of a reciprocating element to pack off the same, said rings being so constructed that only a minimum pressure is necessary to i distortsaid rings into packing position, the dis-, tortion of the rings causing the entire inner'sur face of each ring to engage the element, whereby into. „ i _ The follower is formed with an axial bore »I6 which has the same diameter as the diameter of the reduced portion I2 of the bore of the hous ing. Thus, a polish rod A, or other element may pass upwardly through the housing and through the follower. It is notedthat the element has a f loose ñt in the reduced portion I2 and the bore I6 of the _follower because the diameter of said element is less than? the diameter of said -reduced ì portion _and said bore. The -above described an equal packingaction throughout the length i parts are ofthe ordinaryoconstruction and are, therefore, subject-to variation. , I of the rings is had, which provides for a maxi ' vmum packing area. A further object of the invention is to pro ' In carrying out the invention, a plurality of resilient packing rings I1 are superimposed with vide a pluralityVA of superimposed `resilient rings in the bore I I, the lowermost ring being support which surround a reciprocating element and ed onthe annular shoulder I3. ’The rings may . which, when distorted, >move into ,packing en ‘be constructedof rubber, rubber compound, orv gagement with the lelement, said rings being. con-` structed so as to positively Vengage the~ ele ment without pulling away from said element due to the pressure attempting to escape there by, which affords a perfect seal, the construction « 46 of said rings further permitting »a limited lateral movement or wobble of the element without _breaking said seal. , other suitable ?naterial,-` and, as clearly -shown in Figures 4 and 5, completely encircle the polish rod A. _Since each' ring is constructed in exact ly the same way, it is believed that a description _ of one ywill suiiice. v . Each ring has its upper and lower faces con 40 vex, or curved outwardly at- I8 (Figure 3) .` This convex portion does not extend the entire width A construction designed to carry out vthe in of formed the ring at the and inner thus-an edge annular portion of shoulder the top I9and is _` Iy veiítion will be hereinafter described, together i bottom of the ring.` /The ringr Vis provided with 45 45 with other features of the invention. f an inclined radial slit 20 which extends the width The invention will be more readily understood of the ring and facilitates'the positioning of the Afrom a reading of the following specification and ringswaround the rod and in the bore" he hous by reference to the accompanying drawing, in which an example of the invention is shown, and When the rings have been pla-ecl-Av n the bore 50k 5O wherein: ' ' Il of thebody, as shown in Figure 4, it will be ing.` Figure 1 is aplan view of .one ofthe packing rings, constructed in accordance with the inven ' tion', Figure 2 is a side elevation, ` - "' . seen-that vthe lowermost ring-restsI on the shoul-f vder i3, while the other rings are-.supported on each other. liuc to the curved or convex portion f I 8_0! each ring it will'ïbe obvioii'sfthat there> is_ 55 f x 2 ~2,113,098 only an annular line of contact 2l, at the top of the curve, between each ring. Thus, annular throughout the entire length of the packing rings spaces or channels 22 are formed at the inner and is had. outer edges of the rings between said rings. The pressure, as has been pointed out, is ap plied medially to the annular convex end faces of When the rings are in a normal position, they are in the position shown in Figure 4, with their outer peripheries 23 disengaged from the bore II, and their inner peripheries 24 disengaged from the rod. 10 Y to`be distorted equally, whereby equal packing l Whenthe follower I5 is rotated toV move down-V ' each ring and, therefore, the inner peripheral 5 . face 2,'4 of each ring is held in tight engagement with the surface of the rod `A and the outer peripheral face -23 of the ring in engagement with the cylindrical wall'of the body I0. Therefore, wardly into the bore of the body, the lower end of _ the pressure of fluid against the packing rings -10 said follower engages the convex portion I8 of cannot force the lowermost packing ring to pull the uppermost packing ring I'I, thereby com pressing the rings between the follower and away from the surface of the rod A, as is the case in the flat packing ringsv of the usual con 15 shoulder I3. As the endwise `pressure on saidV struction. Although three packing rings I‘I have rings is increased, it will be seen that the rings been shown, it is pointed out that any number will be distorted with laterally spreading now both inwardly and outwardly on opposite sides of the annular initial line of contact between the convex end faces of the rings. Since the annular spacesv or channels are provided, the rings will may be employed. Further, the rings are not to be limited to packing off a polish rod but may be utilized in any suitable way for any desired purpose. What I claim and desire to secure by Letters naturally distort into these spaces because of the Patent is: ` lack of resistance.A Thus, the concentration of 1. A rod packing comprising a plurality of de the pressure at the middle of the annular convex formable rsolid rings of rubber or like material, end portions of the ring, together with the pro each ring'having annular convex opposite >end vision of the annular spaces or channels, causes -faces joined at their outer margins by a cylindri the rings to be distorted so that the entire inner cal peripheral surface and at their inner margins peripheral face 24 snugly engages the surface by substantially radial flat annular opposite end of the polish rod A. At the same time, the en faces which terminate at and join a. cylindrical 30 tire outer~ peripheral face 23 of each ring-moves bore, said rings being adapted to be disposed in into close engagement with the bore II of the a. stuiling box and surround a rod therein with 30 housing (Figure 5). ` ‘ ` ' ` their convex end face portions superposed and So long as the follower is in a lowered position the rings remain in their packing position `and fluid cannot by-pass the- rod. Since the entire peripheral faces of the rings engage the rod A yand bore II, it is obvious that the' maximum packing area of each is utilized. Further, since the endwise pressure is applied to each ring in the region of the initial annular median line of contact between the convex end faces of the ad joining rings, and due td the annular channels which permit ready distortion, only a minimum vof pressure need ’be exerted to move the rings 46 into their packing position. in substantially medial annular line engagement with each other, and means for applying endwise pressure to said rings throughout the body por tions thereof in the region of said line engage ment of the annular convex end portions of the rings sufficient to effect an intimate engagement of the peripheral surfaces of the rings with the rod and the wall of the stuilìng box through dis 40 vtortion of the component material of the rings with laterally spreading flow thereof. 2. A deformable solid packing ring of rubber ' or like material, having a cylindrical outerv pe ripheral face, a cylindrical bore, annular convex opposite end faces adjacent to and joining at their outer margins with the cylindrical outer spaces or channels are not completely ñlled with 'peripheral face of the ring, and substantially the distorted material of the rings. This per radial flat annular opposite end faces adjacent 50 mits the rod A_which is loose in the reduced por to and joining at their inner margins with the tion I2 of the body bore and in the bore `>IIì óf cylindrical bore of the ring, said flat faces joined the follower, to undergo a hunted lateral move at their outer margins with the inner margins ment, without breaking the seal. Such lateral of said convex annular end faces of the ring, said movement would merely distort the. rings further ring in use'being subjected to endwise pressure into the channels. This 'lateral movement, or and concentrically of its convex annular 55 wobbling occurs in the polish rod of an oil well . medially end .portions and thereby distorted with laterally ^ and thus, it will be _seen the invention is par spreading flow of the component material ticularly adapted for such use, although it is not throughout the entire body whereby to effect an to be so limited as it may be used elsewhere. intimate engagement of the outer peripheral and 60 .It is further pointed out that due to the single the bore surfaces of the ring respectively with 60 initial contact line 2I between the rings, a pres the wall of the stuffing box and a rod therein. sure maintained on said rings in the region’ of It is noted that when the rings are distorted into the packing relation (Figure 5), the annular said line on opposite sides thereof causes them PERCY B. s/kINNER. .