US2208461A - Pump piston - Google Patents

Description

y 1940- E. sT. E. KILBY 2,208,461

PUMP PISTON Filed Oct. 19, 1938 FIG" 1; FIG. 2. F-|e; 4.

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INVENTOR.

B F Edward EFLEImm K-LUJH TTORNEYS.

Patented July 16, 1940 UNITED STATES PATENT OFFICE PUMP PISTON Edward St. Elmo Kilby, Yates Center, Kans.

Application October 19, 1938, Serial No. 235,864

1 Claim (01, 103--225) This invention relates to valved pistons of pumps.

An important object of the invention is to provide means for readily adjusting the peripherally-disposed packing of a piston and for positively retaining the packing in such adjusted position.

Another important object is to provide such a means, employing, as a lock nut, a suitable member associated with pumping operations. As'an example, in the novel valved piston disclosed, a traveling valve is shown for oil pumping purposes, and a conventional standing valve catcher may be employed as a lock nut at the free end of the valve structure to retain the packing and compression spring at desired adjustments. The standing valve catcher thus becomes a permanent portion of the traveling valve structure during operations and, by this arrangement, the

standing valve and traveling valve may be pulled together in one operation, for repairs, regrinding or the like.

Another object is to provide a valve structure, a portion of the body of which may be inserted in a vise or the like and held against rotation while adjustment is being made to the compression spring and packing, all without damage to the packing, spring, cups, spacer rings or other portions of the valve structure.

Still another important object is to provide a traveling valve structure, employing but one valve, yet the packing is effectually relieved of head pressure and the valve may be employed in pumping heavy loads and sand-bearing fluids,

with repairs and replacements materially reduced.

Other objects of this invention will be apparent during the course of the description of the invention, taken in connection with the accompanying drawing, forming a portion of this specification, and in which drawing:

Figure 1 is a vertical section of the novel valve with a conventional valve catcher coupled therewith.

Figure 2 is an enlarged elevation of a fragment of the upper portion of'the valve shown in Figure 1.

Figure 3 is a horizontal section, substantially 50 upon the line 3-3 of Figure 2 Figure 4 is an enlarged elevation and section of a fragment of the lower portion of the valve shown in Figure 1.

Figure 5 is a bottom plan of the fragment 5 shown in Figure 4.

Figure 6 is A an elevation of the novel valve, held in a vise for adjustment of the packing.

In the drawing, wherein for the purpose of illustration is shown a preferred embodiment of the invention and wherein similar reference 5 characters designate corresponding parts throughout the several views, the letter A may designate the novel valve, the letter B a conventional valve catcher, the letter C a vise and D a section of tubing. 10

The novel valve A includes a tubular body portion I0, having a suitable valve seat II at its upper end I2,may have exterior screw threads below the seat II and an abutment I3 below the screw threads, this abutment being in the nature 15 of an enlargement, integral with the body portion II], having wrench faces 14, so that the body portion may be held against rotation or other movement when a vise or wrench is employed to grip the abutment I3. 20

Below the abutment I 3 is disposed a suitable means to urge the packing, later described, toward the lower end of the body portion ID. This means may be an expansion coil spring I5 about the periphery of the body portion, bearing at 25 one end against'the lower face of the abutment I3 and with the opposite end of the spring I5 bearing upon the upper end of the uppermost of two or more conventional spacer rings it which cooperate with conventional packing cups IT, as 30 is well known in the art.

Disposed below the lowermost of the packing cups I! is a collar I8, slidable longitudinally of the body portion I0 and having an upper groove to receive the lower-end of the lowermost packing 3 cup I! and a lower groove to receive the uppermost end of a suitable conventional expansible and contractable packing I 9 disposed, as by winding, about a section of the periphery of the body portion I0. The lowermost end of the packing I9 is disposed within a suitable groove 20' in the upper end of an adjusting nut 20, which nut 20 has screw threads adapted to cooperate with exterior screw threads 2I upon the lower end 22 of the body portion I 0. It will be noted in Figures 1 and 5 that the screw threads 2| extend a considerable distance along the periphery of the body portion I i], so that there may be ample adjustment and compression of the packing I9, by means of the nut 20, and yet allow the extremity of the lower end 22 of the body portion II] to extend below the nut 20. The lowermost face of the nut 20 is substantially fiat. The valve seat I I may seat a ball valve member 23, housed in a suitable cage 24, as is well known in the art, the cage having interior screw threads at its lower end to engage the screw threads at the upper end of the body portion l0.

Carried at the extremity of the lower end 22 of the body portion I0 is a suitable means to lock the nut against rotation and have another function as well. This means may be a conventional standing valve catcher B. Such a catcher is not carried at the end of the traveling valve in standard practice, but is so employed herein and when screwed upon the lower end of the body portion Ill, utilizing its interior screw threads 25, cooperating with the exposed screw threads 2|, and with its upper face 26 in tight abutment with the lowermost face of the nut 20, the catcher B will function as a lock nut, yet may be employed, when desired, to couple together the traveling valve A and a conventional standing valve (not shown) in order to pull both together. Thus, the nut 20 will not work loose,

which would tend to release the packing IE or cause it to contract.

From Figure 6 it will be seen that because the portion 13 is integral with the body portion Ill, the valve may be held in a vise C, for example, against rotation of the body portion 10, and a suitable section of tubing D such as a small length of well tubing, slipped over the valve whereupon the nut 20 may be tightened so as to properly compress the spring-I 5 and give the desired adjustment of the packing l9, i. e., so that the packing will have the desired frictional engagement with the interior face of the wall of the tubing D.

While but one valve and one valve seat is employed, the construction is such that the assembly may be used in pumping oil, for instance, carrying a relatively heavy load of sand and there will not be the delays encountered in the packing becoming loosened and necessitating withdrawal of the valve, nor will two operations be necessary to withdraw each of the traveling valve and standing valve in turn.

Various changes may be made to the form of .invention herein shown and described, without departing from the spirit of the invention and scope of the following claim.

' I claim: a

In a traveling valve adapted for pumping cooperation with a standing valve disposed below said traveling valve, a tubular body portion, with a portion of the material forming said portion extending outwardly beyond the periphery of said body portion adjacent its upper end providing an abutment, and with screw threads at its lower end, compressible and expansible packing disposed about a section of the periphery of said body portion, resilient means bearing against said abutment and urging said packing toward the screw threaded end of said body portion, means for expanding said packing including a nut having screw threads cooperating with said first-named screw threads, and rotatable means disposed below said nut to provide both a lock for said nut and a selective coupling of said traveling valve and said standing valve.

EDWARD ST. ELMO ICILBY.

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