Wells – Processes – Placing or shifting well part
Patent
1991-01-30
1991-10-22
Britts, Ramon S.
Wells
Processes
Placing or shifting well part
166387, 175318, E21B 3313
Patent
active
050586840
ABSTRACT:
A retrievable bridge plug apparatus, and associated methods, are provided for sealing the bore of a drill pipe string to control a well that is flowing out of control.
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Exhibit A--Brochure of Baker Oil Tools entitled "Baker Completion Systems Special Products", p. 816 (undated but admitted to be prior art).
Exhibit B--Halliburton Services Sales & Service Catalog, No. 43 (1985), pp. 2556-2562.
Brisco David P.
Winslow Donald W.
Beavers L. Wayne
Britts Ramon S.
Duzan James R.
Halliburton Company
Schoeppel Roger J.
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