Wells – Expansible anchor or casing – With wedge or cam and friction drag
Patent
1998-03-05
2000-05-16
Bagnell, David
Wells
Expansible anchor or casing
With wedge or cam and friction drag
166210, 166243, E21B 2301
Patent
active
060623098
ABSTRACT:
A mandrel-operated torque roller anchor for insertion into the casing of a well, which when set resists axial movement and prevents rotation of itself and the string above it in one direction, but permits such motion when rotated in the other direction. The anchor comprises a central mandrel and a slip cage. The slip cage has a number of elongated slots. A number of drag slips rest on the mandrel within the slip cage and provide limited outward movement, through the slots, to bear against the casing. Each drag slip has a surface with wickers to grip the casing and set the anchor, and an adjacent unwickered drag portion to bear against the casing to allow the mandrel to rotate relative to the slips and cage, but permit axial movement of the string. Slots running through the drag portion of the slip provide flow around the anchor. Biasing elements extend between the mandrel and an interior surface of each slip to force the drag portion of the corresponding slip against the casing when in an unset position. Rollers are carried in axial grooves on the external surface of the mandrel and in an unset position are held by and positioned beneath the cage. In a set position the rollers are oriented beneath, and cause to pivot against the biasing elements, the wickered surfaces, to set the anchor. Components on the mandrel and cage limit rotative movement of the mandrel with respect to the cage between set and unset positions.
REFERENCES:
patent: 2737245 (1956-03-01), Knox
patent: 3102592 (1963-09-01), Dollison
patent: 3437136 (1969-04-01), Young
patent: 3526277 (1970-09-01), Scott
patent: 3599712 (1971-08-01), Magill
patent: 3887006 (1975-06-01), Pitts
patent: 5119875 (1992-06-01), Richard
patent: 5275239 (1994-01-01), Obrejanu
patent: 5623991 (1997-04-01), Jani
patent: 5636690 (1997-06-01), Garay
patent: 5771970 (1998-06-01), Jani
Varipharm Product 167 TQ Anchor--vol. 2, Dec. 1995, Canada, Published by: World Oil.
Brown Oil Tools, Inc., 1966-67, Canada.
Bagnell David
Kang Chris H.
Variperm Limited
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