Valve cage insert
View Patent ↗The insert for a ball and seat valve comprises a tubular cylindrical body formed by vertically spaced apart top and bottom rings joined by helically inclined and circumferentially spaced apart ribs defining side openings. The ribs support inwardly arching ball guide flanges which thin in cross-section as they extend inwardly and upwardly from the ribs. The inner upper ends of the flanges are connected with and tied together by an elongate, upwardly extending reinforcing member protruding above the top ring. The reinforcement member provides structural strength to the thinned flanges. Thinning of the flanges leads to increasing the open area of the top outlets, thereby promoting the volumetric fluid capacity of the valve.
1. An insert for use in the shell of a ball and seat valve finding application in a reciprocating downhole pump, comprising:
a cylindrical tubular body forming a through-bore and having vertically spaced apart top and bottom rings joined by circumferentially spaced apart ribs, the rings and ribs combining to form side openings;
the ribs supporting inwardly protruding flanges having upper inner ends arching together toward the longitudinal axis of the body, the flanges each thinning upwardly and inwardly and having curved bottom surfaces; and
an upwardly directed, elongate reinforcing member connected with the flanges at their upper inner ends, the reinforcing member and flanges protruding above the top ring;
the curved bottom surfaces of the flanges and the reinforcing member combining to form a semi-spherical ball stop located beneath an upper edge of the top ring.
2. The insert as set forth in claim 1 wherein:
the ribs are inclined and shaped to form helically configured side openings; and
the flanges are helically directed.
3. The insert as set forth in claim 2 wherein:
the flanges correspond at their bases with the shaping of the ribs.
4. The insert as set forth in claim 3 wherein there are three ribs supporting three flanges.
5. The insert as set forth in claim 2 wherein there are three ribs supporting three flanges.
6. The insert as set forth in claim 1 wherein:
the flanges each thin upwardly and inwardly along their inner ends.
7. The insert as set forth in claim 6 wherein there are three ribs supporting three flanges.
8. The insert as set forth in claim 1 wherein there are three ribs supporting three flanges.