Wells – Processes – Placing or shifting well part
Patent
1990-08-22
1992-06-02
Neuder, William P.
Wells
Processes
Placing or shifting well part
166386, 166 77, E21B 3310
Patent
active
051179156
ABSTRACT:
A ported float shoe (5) and a landing collar (16) are attached at a first end of a portion of a casing string (4) and a sliding air trapping insert (20) is attached at the other end. The air trapping insert (20) includes a fluid flow passageway (24) blocked by a plug (22) attached by shear pins to the insert (20) or the air trapping insert is an inflatable insert (55) having a conduit (60) providing a fluid passageway to the first end. The air trapping insert and float shoe form an air cavity (12a or 12b) within the string portion (4). The air cavity provides buoyant forces during running, cementing or other casing operations within a borehole (2), reducing running drag and the related chance of a differentially stuck casing (4). It also allows reciprocation and rotation during cementing and avoids separate removal steps.
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patent: 4308917 (1982-01-01), Dismukes
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"Mobil Identifies Extended-Reach-Drilling Advantages, Possiblities in North Sea" by Tolle et al., Presentation of Off shore Northern Seas Conf., 1985.
"Extended Reach Drilling From Platform Irene", by Mueller et al., OTC #6224, Presented at 22nd Annual Offshore Technology Conference, May 7-10, 1990.
Jones Frank L.
Mims Michael G.
Mueller Mark D.
Quintana Julio M.
Ruddy Kenneth E.
Jacobson William O.
Neuder William P.
Union Oil Company of California
Wirzbicki Gregory F.
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