E - Fixed Constructions – 21 – B
Patent
E - Fixed Constructions
21
B
166/43
E21B 33/124 (2006.01) E21B 23/06 (2006.01) E21B 33/1295 (2006.01)
Patent
CA 1167761
-19- ABSTRACT OF THE DISCLOSURE The invention relates to downhole apparatus for causing sealing or mechanical engagement between two conduits. The apparatus includes telescopingly interfitted housing (32) and mandrel (16) members movable one relative to the other to actuate the seal and anchor systems for setting the packer. A locking mechanism for holding the packer in the set position includes a cylindrical lock ring (72) having axially spaced ratchet teeth, referred to in the art as wickers (70), on an outer circumferential surface engageable with cooperating internal axially spaced ratchet wickers (62) formed on the housing member. The lock ring (72) also includes axially spaced teeth (84) on an inner circumferential surface engageable with cooperating teeth (76) on a collapsible latch system engaged with the mandrel which may be collapsed radially inwardly to release the lock ring with respect to the mandrel to permit relative movement between the mandrel and the housing to release the packer elements from engagement with the casing. The collapsible latch system is held in position by a supportive sleeve (52) slidably disposed in a bore formed in the mandrel and held in its retaining position by shear pins (95). The arrangement of the mandrel (16) and housing (32) and the latching and releasing mechanism is adapted for use in well tools of all types and may be set by fluid pressure applied to an expansible chamber, within the apparatus, by various wireline setting tools adapted to move the mandrel with respect to the housing, or mechanically, and can be retrieved simply by shiftingthe supporting sleeve to release the latch system and lifting the tool by the mandrel.
384481
Baker International Corporation
Goudreau Gage Dubuc
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