US1067496A - Valve for well-pumps. - Google Patents

Description

T. B. WILKINSON. VALVE FOR WELL PUMPS. APPLIOATION FILED APR-.17, 191 2.

Patentd July 15, 1913.

Invgni'. or. 0mm? 15. wdisz'nron.

witnesses.

THOMAS B. WILKINSON, OF LOS ANGELES, CALIFORNIA.

VALVE FOR WELL-PUMPS.

Specification of Letters Patent.

Patented July 15, 1913.

Application filed April 17, 1912. Serial No. 691,329.

commonly known in the art as standing valves, and an obgect thereof 1s to provide a valve mechanism which will at all times remain stationary and will not become loose and work up and down with the suction plunger of the pump mechanism during its operation.

A further object of the invention is to provide a novel standing valve construc-.

tion, in which the packing is expansible,

whereby the valve will always be maintained:

I in positive engagement with its seat at all times after its initial placement.

I accomplish these objects by means of the device described herein and illustrated in the accompanying drawings, in which:

Figure 1 is a central vertical section of a pump barrel showing the pumping mechanism located therein, my new valve being shown in elevation at the bottom thereof. Fig. 2 is a front elevation of my standing valve mechanism, partially in section, showing it in place in the pump barrel. Fig. 3 is a transverse section taken on the line 33 of Fig. 2. Fig. 4 is a front elevation of a portion of my standing valve mechanism, and showing the form of a valve cage.

In the drawings, 5 indicates a pump barrel of usual construction which is inserted in the bore of the well, and mounted therein and in movable engagement therewith is a hollow suction plunger 6 provided on the upper end thereof with a ball valve 7 and cage 8 therefor. This suction plunger is of usual form and is operated by mechanism of usual construction (not shown). The lower end of said plunger is interiorly screw threaded, a hollow'cylindrical washer 9 being in screw threaded engagement therewith. This washer being in the lower end of the suction plunger presents an annular shoulder 10 which is adapted to arrest the wings of a spider 11 which is in screw threaded engagement with the upper end of a connecting rod 12, the use of which will be more fully explained hereinafter.

The extreme lower internal periphery of the pump barrel 5 is sub-conical in form as clearly indicated at 13, thus forming a seat for the lower end of the standing valve. This valve 14 preferably consists of an annular exteriorly tapering hollow base member 15, sub-conical in form, which is seated in the lower end of the pump barrel 5 as clearly shown in Figs. 1 and 2 of the drawmg.

Mounted in the centrally disposed bore 16 of member 15, is a hollow cylindrical member 17, the lower end of this member extends downwardly below the pump barrel 5, and its exterior surface is tapered approximately from the upper edge of the member 15 upwardly and to within a short distance of its top, as clearly shown in Fig. 2 of the drawing. From the upper end of the tapering portion it extends in a vertical direction the remaining distance, and is exteriorly screw threaded as at 18 for the engagement of an interiorly threaded base member 19 of the valve cage 20. The upper interior bore of the valve member 17 is greater in diameter than the main bore so as to form an annular shoulder 21 in which is seated a ground valve seat 22, the upper end of which receives the ball valve, 23.

The valve seat 22 is held securely in position by the base section 19 of the cage 20. This cage 20 is provided with the usual upwardly extending arms 2% which meet at the top thereof and form a bearing 25 for the connecting rod 12 which has heretofore been mentioned.

As shown in my construction, the two other arms extend upwardly from the valve seat or base member 19, terminating in free ends to prevent the cage from clogging with sand or other debris during a pumping operation. These arms 26, terminating approximately midway bet-ween the ball seat and bearing 25 allow for a free and unobstructed flow of oil through the lower standing valve to the plunger 6. Arms 24 and 26 are preferably triangular in cross section, so as to give more clearance for the oil which is pumped, and also to allow the ball valve 28 to clear itself of any sand or gravel that may be held in suspension in the oil, thus eliminating any probability of the ball sticking. The lower end of connecting rod 12 is provided with an anvil 27, the under face or base of which is concave so as to form a seat for the ball 28. During the downward movement of the plunger 6 the connecting rod 12 will drop and normally force ball 23 to its seat, thus preventing any escape of fluid from, the plum ger 6 of the pump.

Inter-posed between, the lower end of, the base member 19 and the upper horizontal face of the member 15 is a spirally formed packing 28 which is preferably rectangular in;cross section, and formed of Babbitt metal, fiber, leather orother similar material. This packing is cylindrical in form externally and sub-conical in form internally to conform to the tapering base member 15, and; serves to keep the standing valve in positive: engagement by expansion at all times and under all circumstances with the interior annular periphery of the pump barrel; 5, thus preventing any shifting or movementofthe valve fromitsoriginal position.

The weight of the suction plunger 6 and other pumping mechanism is sufficient to forcethe standing valve downwardly to its seat, the ta ering portion 17 of the valve expanding t e packing 28 into positive engagement with the interior surface of the pump barrel, If; there is any slack after the valve has been forced into place by the weight of the mechanism as hereinbefore described, it may be taken up by a mechanism which preferablyv consists of a coiled spring 29, interposed between the lower end of the member 15 and a coupling 30, which is in screw threaded engagement with the lower end of'member 16. Into this coupling is screwed another length of pipe 31 which serves to act as a lock nut and prevent the disengagement of the coupling 30 from the member 16.

lVhen it is desirableto remove the standing valve the pumping mechanism above the same is pulled upwardly, the arms of the spider 11' contacting with the annular shoulder 10 of the member 9, thus it may be pulled upwardly andfrom its seat and out of the barrel 5 0f thepump.

The operationof my improved valve will be understood from the following: hen the suction piston. 6 is reciprocated in the pump barrel 5 on its upward stroke it will force the oil from the bottom of the well upwardly through the central boreof the standing valve and force the ballvalve 23 and the rod 12 upwardly until the subconical end 27 engages the lower face of the bearing 25 of the cage, the oil following upwardly into the barrel of the suction plunger, and thence upwardly through a ball valve32 attached-to the upper end of the suction plunger to the point of discharge.

By providing an expansible packing and forming the centrally disposedmember of the standing valve sub conicalin form, as is also the packing on its inner face, I am enabledto expand the same into a close and positiveengagement with the interior surface of the pump barrel and to maintain it in this position at all times and under all circumstances, thus obviating the loss of unnecessary time in repairs or replacement of the standing valves that might by the old method of construction and placement be pulled out of position during the pumping operation.

that I claim is:

1'. The. combination with a pump barrel provided with azvalve seat, of a valve mecha: nism mounted therein, said mechanism comprising a, hollow cylindrical member pro vided with a valve seat, a valve stopper mounted thereon, and a sairally arranged internally taperedexpansible packing surrounding said cylindrical member.

2. A standing valve forwell pumps, comprising a hollow cylindrical member adapted tovbe seated in the barrel of a pump, a ball'valve mechanlsm.mounted on the upper end of said member, and a spirally arranged member and the inner surface of said pump barrel, and means to force said packing into positive engagement with said pump barrel after the initial placement of said valve member inv said barrel;

4; A standing valve for well'pumps, comprising a hollow cylindricalimember adapt:- ed for engagement with the barrel of the pump, a ball valve and a-seat therefor on the upper endof said member, and'a spirally arranged lnternally tapered expansible packmg surrounding said member.

5. The combination with a pump barrel provided on its lower end with a tapered valveseat, of a hollow cylindrical memberhaving shoulders midway of its oppositely disposed ends mountedtherein, a spirallywound internally tapered packing surround ing said member,- the upper and'lower ends of said packing abutting against said shoulders, sa-id packing being-formed of an expansible material, and a valve seat formed on the upper ends of said member and aballvalve therefor.

6. The combination with a pump barrel provided on its, lower end with a tapered valve seat, a hollow cylindrical memberseated therein, asecondhollow cylindrical member, mounted in said-firstnained member, a valve cage plOVlClGdWltll a valveseat and a ball therefor mounted on the upper end of said second named member, a spirally wound expansible packing surrounding said second named member, the interior periphery of said packing being tapered from the upper end thereof to its lower extremity, a spring tension means mounted on said second named member and adapted to force the first named member upwardly so as to expand the packing surrounding said second named member into engagement with the pump barrel.

7. A standing valve for well pumps, comprising a hollow cylindrical member adapted for engagement with the barrel of the 15 pump a ball valve and a seat therefor on the upper end of said member, a spirally arranged expansible packing surrounding said member, and means to force the said packing into positive engagement with the 20 pump barrel after the initlal placement of said valve member in the pump barrel.

In Witness that I claim the foregoing I have hereunto subscribed my name.

THOMAS B. WILKINSON. Witnesses:

EDMUND A. STRAUSE, EARLE R. PoLLAnD.

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

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