METHOD FOR SEALING OF A BOREHOLE LINER IN AN ARTESIAN WELL

摘要

A method for sealing a flexible liner that has been emplaced in a borehole manifesting artesian water flow. The upper end of the liner is closed with a plug, and a mud tube is extended from the plug down to a small volume of mud at the bottom end of the liner. The pressure in the liner interior is increased according to the weight of the mud column in the mud tube. Pressure in the liner interior can be regulated by allowing mud to move up and down in the mud tube, and by adding or withdrawing water from the closed liner interior.

主权项

1. A method for sealing a flexible liner disposed in a borehole having a wall, comprising:
placing a volume of weighted mud in a liner interior; at least partially filling the liner interior, above the volume of weighted mud, with water; sealing with a plug an upper end of the liner; installing a mud tube through the plug and extending the mud tube in the liner interior between the plug and the volume of weighted mud; and at least partially filling the mud tube with a flowable mud.