Sand release apparatus and method

Details Sand release apparatus and method Sand release apparatus and method

1990-06-11

1991-05-28

Novosad, Stephen J.

Wells

Processes

Operating valve, closure, or changeable restrictor in a well

166 68, 166317, 166386, 166105, E21B 2300, E21B 3414, E21B 4300

Patent

active

050185810

ABSTRACT:
An apparatus and method are disclosed which are utilized in oil wells incorporating a reciprocating pump. The improvement is for the situation where the typical sand release apparatus has failed to clear a sand lock. The disclosed apparatus is such that the rotation of the two telescoping sleeves relative to each other is restricted thereby allowing the tool string to be unthreaded at a reverse thread at the top of the sand release apparatus. In this way, the apparatus allows removal of the tool string above the location where the tool is locked through rotation in a direction opposite of that normally used to unthread tool strings.

REFERENCES:
patent: 2626177 (1953-01-01), Maxwell et al.
patent: 4103739 (1978-08-01), Hall
patent: 4359094 (1982-11-01), Risinger

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