Expansible chamber devices – With releasable stop or latch means to prevent movement of... – Means includes element interfitting between working member...
Patent
1991-04-01
1992-03-17
Look, Edward K.
Expansible chamber devices
With releasable stop or latch means to prevent movement of...
Means includes element interfitting between working member...
92 21MR, 92 27, F15B 1526
Patent
active
050958089
ABSTRACT:
A sequential remote control plug release system allows actuation of plug release plungers and manifold valves associated with a cementing plug container only in a predetermined sequence. With regard to a plug container having two plugs, and thus two plug release plungers, and three manifold valves, the middle and upper manifold valves and the upper plug release plunger can be opened and retracted only in a predetermined sequence. This is implemented through interconnected actuation valves and sequencing valves contained in a housing which can be located remotely from the plug container. An improvement in plug release plungers is also disclosed.
REFERENCES:
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patent: 2434828 (1948-01-01), Ashton et al.
patent: 2615519 (1952-10-01), Carr
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patent: 2887991 (1959-05-01), Driskel et al.
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LaFleur Petroleum Services brochure which begins "Now . . . a Safe, Sure and Proven Cementing Head that Permits Positive Plug Drop with Continuous Cement Flow", believed to be published more than one year prior to Apr. 27, 1990.
LaFleur Petroleum Services brochure with front page containing the word "FASDROP", believed to be published more than one year prior to Apr. 27, 1990.
Halliburton Company Technical Data Sheet C-1152, "Remote Control For Release of Cementing Plug", dated Nov., 1965.
Denion Thomas E.
Duzan James R.
Gilbert III E. Harrison
Halliburton Company
Look Edward K.
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