Wells – Processes – Placing or shifting well part
Patent
1992-10-28
1994-06-07
Britts, Ramon S.
Wells
Processes
Placing or shifting well part
166387, 1661176, 166123, 166181, E21B 2300
Patent
active
053181328
ABSTRACT:
Whipstock/packer assembly equipment and procedures to retrieve and reuse a whipstock assembly during drilling operations for horizontal drainhole application. The anchor is seated in a retrievable packer and has a bore communication with the fluid path in the whipstock and ports through the anchor body to the bore. Fluid pumped through the ports after a drilling operation flush cuttings from the annulus between the anchor and the associated packer and carry them to the surface, thereby preventing the cuttings from hampering removal of the anchor. The same fluid path can be used to introduce a gel to the annulus prior to drilling to prevent cuttings from collecting on the packer. Introduction of fluid after the drilling operation may be employed to remove the gel and collected cuttings or the whipstock/packer assembly may be withdrawn without flushing.
REFERENCES:
patent: 4397355 (1983-08-01), McLamore
patent: 4530398 (1985-07-01), Greenlee et al.
patent: 4565247 (1986-01-01), Tapp et al.
patent: 4665977 (1987-05-01), Mullins
patent: 5113938 (1992-05-01), Clayton
patent: 5154231 (1992-10-01), Bailey et al.
patent: 5197547 (1993-03-01), Morgan
Britts Ramon S.
Marathon Oil Company
Schoeppel Roger J.
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