E - Fixed Constructions – 21 – B
Patent
E - Fixed Constructions
21
B
166/63
E21B 33/124 (2006.01) E21B 33/129 (2006.01) E21B 33/134 (2006.01) E21B 33/136 (2006.01)
Patent
CA 1294869
PERMANENT ANCHOR FOR USE WITH THROUGH TUBING BRIDGE PLUG Abstract of the Disclosure A through tubing bridge plug is disclosed. In the preferred and illustrated embodiment, a central hollow tube having a passage therein supports the external parts. The central passage terminates top and bottom with openings or passages. At the top end, a sleeve valve mechanism originally pinned in an open position is installed. When the installation is completed, the sleeve valve is closed by a sequence of operations -to permanently close the flow path. The device is set and anchored by applying a relative downward force to an external sleeve thereby deploying multiple link -toggle means to lock the device in location, additionally deploying a upwardly facing petal basket to receive a charge of sand and cement to form a plug, and also deploying a centralizer. The device is installed at a specified elevation by anchoring the toggle means to prevent movement, deploying the petal basket to hold sand and cement for curing, locating the device in the casing by a centralizer, and bypassing fluid around the curing sand and cement through a central tubing opening below and above the uncurred materials. The final step includes closing a sleeve valve means to prevent further flow through the device.
562137
Haliburton Company
Swabey Ogilvy Renault
LandOfFree
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