E - Fixed Constructions – 21 – B
Patent
E - Fixed Constructions
21
B
E21B 29/00 (2006.01) E21B 10/32 (2006.01) E21B 17/10 (2006.01)
Patent
CA 2132858
2132858 9319281 PCTABS00025 A well conduit cutting and milling apparatus (22) conveyable into and out of a well on coilable tubing (27) using a tubing injection unit (21). The apparatus includes tubing or casing cutting arms (30) which are radially extendable and retractable with respect to a cylindrical support body by pressure fluid operated pistons (64, 70). The apparatus is made up of multiple end-to-end connected units including one which supports interchangeable cutting and milling arms (30) and units which have radially extensible and retractable stabilizing arms (38) which engage the inner wall of the tubing (12) or casing (10) to centralize and stabilize the apparatus during operation. The cutter and milling arms (30) are modified for milling away a section of tubing (12) by moving the apparatus in an upward or out of the well direction. The cutting elements (34) are preferably cylindrical hard metal members which are supported on the arms (30) for cutting away an end face of the tubing (12) in a tangential direction of movement.
Hailey Charles D.
Hearn David D.
Hightower Charles M.
Ward Stephen L.
Atlantic Richfield Company
Hailey Charles D.
Osler Hoskin & Harcourt Llp
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