Multiple liner method for borehole access

Details Multiple liner method for borehole access Multiple liner method for borehole access

1998-06-15

2000-02-22

Suchfield, George

Wells

Processes

With indicating, testing, measuring or locating

166 66, 166 72, 166 971, 1662422, 1662423, 1662441, 166384, 166385, 405184, E21B 1700, E21B 3310, E21B 4325, E21B 4701

Patent

active

060269006

ABSTRACT:
A method is provided for supporting and sealing structure defining a generally cylindrical hole while introducing and removing devices from the hole. A first flexible liner is installed in the hole and pressurized to a pressure effective to support and seal the structure. A second flexible liner is everted between the first flexible liner and the structure, where the second flexible liner carries the devices to introduce and remove the devices from the hole while the first liner remain pressurized to continuously support and seal the structure.

REFERENCES:
patent: 2583316 (1952-01-01), Bannister
patent: 2927775 (1960-03-01), Hildebrandt
patent: 4976322 (1990-12-01), Abdrakhmanov et al.
patent: 5176207 (1993-01-01), Keller
patent: 5181565 (1993-01-01), Czernichow
patent: 5524709 (1996-06-01), Withers
patent: 5794702 (1998-08-01), Nobileau
patent: 5803666 (1998-09-01), Keller
patent: 5853049 (1998-12-01), Keller

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