Well bottom release valve

Claim 1

A valve assembly for draining a liquid from a well pipe comprising a pipe member having a permanently fixed lower flange and a removable upper flange, means for connecting said pipe member above said removable flange to a well pipe, a slidable sleeve circumscribing said pipe member, a coiled spring circumscribing said pipe member and positioned between said removable upper flange and said slidable sleeve to continually urge said sleeve downwardly to sealably enclose a liquid exit port bored in said pipe member above said permanently fixed lower flange and said slidable sleeve when said sleeve is in its maximum upward position, a complimentary spring biased detent functioning locking means including a groove and spring biased bearing means carried in communicable relationship on either said pipe or said sleeve for retaining said sleeve in a locked upward position and an external remote pulling means attached to said sleeve and extending upwardly to a point above ground surface for moving said slidable sleeve upwardly and engaging said locking means and thereby exposing said liquid exit port to permit liquid contained in said well pipe to drain therefrom and to permit said sleeve to be released from said locking means by further pulling said sleeve upwardly and thereby increasing said spring tension force to a degree where it is sufficient to override and bypass any containment of said spring biased bearing in said groove when said pulling means is released and thereby permit said sleeve to return to its normal position and enclose said liquid exit port.