Gravel pack assembly with tubing seal

A sand control screen assembly for installation in a well comprising:

• a sand control screen operably connected to an elongated tubing;
• a tubing seal support sub including means for securing said sub in a predetermined position in a wellbore, said seal support sub including at least one circumferential seal member operably engaged with said tubing to permit reciprocation and rotation of said tubing relative to said seal support sub while maintaining a substantially fluid tight seal between spaced-apart portions of a wellbore;
• and
• frangible coupling means interconnecting said tubing and said seal support sub in such a way that said tubing, said sand control screen and said seal support sub may be run into a wellbore and said tubing disconnected from said seal support sub to permit reciprocation of said tubing relative to said seal support sub while maintaining a fluid tight seal therebetween.