Tubing drain

Details Tubing drain Tubing drain

E - Fixed Constructions

21

B

166/52

E21B 41/00 (2006.01)

Patent

CA 1127075

ABSTRACT OF THE DISCLOSURE 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 blow 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. -1-

339843

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