Tubing drain

Details Tubing drain Tubing drain

1979-11-05

1981-09-01

Leppink, James A.

Wells

Valves, closures or changeable restrictors

Destructible element

137 70, E21B 4311

Patent

active

042866626

ABSTRACT:
A well tubing drain assembly includes a tubing wall containing a bore intersecting the tubing interior and a counterbore intersecting the tubing exterior, an annular retainer in the counterbore having connection to the wall, the retainer forming a side drain passage, a retainer member carried by the retainer and projecting into the drain passage, a closure in alignment with the drain passage and retained by the member at the side thereof closest to the tubing bore interior, the closure closing off said tubing wall bore, the closure adapted to be blown out the drain passage when fluid pressure in the tubing bore transmits sufficient force via the closure to rupture said member, and a sealing washer located in the counterbore and extending about the closure to have sealing engagement therewith in response to pressure exerted on the washer by the fluid in the tubing.

REFERENCES:
patent: 2178845 (1939-11-01), Baker
patent: 2201290 (1940-05-01), Greene
patent: 2589144 (1952-03-01), Russell et al.
patent: 3358770 (1967-12-01), Zandmer
patent: 3366182 (1968-01-01), Solum
patent: 3417822 (1968-12-01), Howell

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