US2095553A - Trap cage - Google Patents

Description

C. MAGEE Oct. 12, 1937.

TRAP GAGE Filed June 26, 1936 ATTORN EYS Patented Oct. 12, 1937 UNITED STATES PATENT OFFICE TRAP CAGE Clyde Magee, Freer, Tex.

Application June 26, 1936, Serial No. 87,525

1 Claim. (Cl. 103-225) T s invention relates to attachments for oil well pumps and has for the primary object the provision of a simple and inexpensive device of this character which will prevent sand and other foreign matter taken up with the oil from gravitating back into engagement with the cups of the pump plunger consequently obviating undue wear on the cups and the sticking thereof and which may be easily and quickly adapted to a pump plunger without alteration thereto.

With these and other objects in View, this invention consists in certain novel features of construction, combination and arrangement of parts to be hereinafter more fully described and claimed.

For a complete understanding of my invention, reference is to be had to the following description and accompanying drawing, in which Figure 1 is a fragmentary vertical sectional View illustrating the application of my invention to a pump plunger and showing the same operating in a pum barrel.

Figure 2 is a sectional view taken on'the line 2-2 of Figure 1.

Figure 3 is a sectional view taken on the line 33 of Figure 1.

Referring in detail to the drawing, the numeral I indicates a pump barrel commonly used with oil pumps in which reciprocates a pump plunger 2 including the usual cups 3. A pump plunger of the character shown when reciprocating in the barrel-to raise oil from the well also lifts a large amount of sand and other foreign matter which matter after reaching a certain height in the well gravitates and frequently clogs the cups and causes sticking thereof and undue wear on said cups. To eliminate troubles of this kind,

my invention is adapted to the pump plunger and consists of a sleeve 4 threaded on the pump plunger, as shown at 5, and snugly fits the barrel l. A valve cage 6 is located in the sleeve and may be welded or otherwise secured thereto. The stem 1 of the cage 5 is connected to the usual operating rod 8 of the pump. A ball valve 9 operates in the cage in conjunction with a seat ll] held in the sleeve by a shoulder l l and the end of the plung- During the reciprocation of the plunger 10 2 in the barrel oil as well as foreign matter is forced upwardly past the valve 9 and the foreign matter after reaching a certain height or after the stopping of the pump gravitates and the sleeve having tight fit with the pump barrel prevents the foreign matter from contacting the cups 3 but will permit such foreign matter to pass therein so that on starting again of the pump such foreign matter may pass through the plunger during the unseating of the valve 9. It is to be understood that the oil and foreign matter passing upwardly in the barrel pass through the sleeve 4.

The upper edge of the sleeve is tapered, as shown at l2. 7

Having described the invention, I claim:

In combination with an oil well pump having a barrel and a plunger therein, a sleeve having a slidable snug fit with the barrel and detachably secured to the plunger at one end and having the other end thereof tapered internally, a shoulder formed in said sleeve, a valve seat held in the sleeve by the shoulder and the plunger, a Valve cage secured to the sleeve and to an operating stem, and a ball valve operating in the cage in conjunction with the seat.

- CLYDE MAGEE.

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