Hydraulically set well packer
First Claim
Patent Images
1. A hydraulically set well packer, for forming a fluid barrier at a downhole location within a well bore, having a mandrel means with packing elements and anchoring means carried on its exterior and a longitudinal bore extending therethrough, comprising:
- a. a shoulder on the exterior of the mandrel means;
b. a setting sleeve surrounding a portion of the mandrel means and longitudinally slidable relative thereto;
c. piston means slidably disposed on the exterior of the mandrel means and operatively engaging the setting sleeve;
d. the packing elements and anchoring means positioned between the shoulder and the setting sleeve;
e. an annular recess formed in a portion of the setting sleeve;
f. flexible collet fingers attached to the mandrel means;
g. a collet head on the end of each finger; and
h. means for releasably engaging the collet heads with the annular recess.
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Accused Products
Abstract
A hydraulically set well packer. The setting sleeve is releasably locked to the packer mandrel to prevent premature setting while the packer is being lowered to its desired downhole location. The setting sleeve is unlocked by increasing fluid pressure within the packer mandrel above a preselected value. The length of the setting sleeve can be easily adjusted to accommodate additional piston units, changes in mandrel length, and various packing elements.
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Citations
11 Claims
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1. A hydraulically set well packer, for forming a fluid barrier at a downhole location within a well bore, having a mandrel means with packing elements and anchoring means carried on its exterior and a longitudinal bore extending therethrough, comprising:
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a. a shoulder on the exterior of the mandrel means; b. a setting sleeve surrounding a portion of the mandrel means and longitudinally slidable relative thereto; c. piston means slidably disposed on the exterior of the mandrel means and operatively engaging the setting sleeve; d. the packing elements and anchoring means positioned between the shoulder and the setting sleeve; e. an annular recess formed in a portion of the setting sleeve; f. flexible collet fingers attached to the mandrel means; g. a collet head on the end of each finger; and h. means for releasably engaging the collet heads with the annular recess. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A hydraulically set well packer, for forming a fluid barrier at a downhole location within a well bore, having a mandrel means with packing elements and anchoring means carried on its exterior and a longitudinal bore extending therethrough, comprising:
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a. a shoulder on the exterior of the mandrel means; b. a setting sleeve surrounding a portion of the mandrel means and longitudinally slidable relative thereto; c. piston means slidably disposed on the exterior of the mandrel means and operatively engaging the setting sleeve; d. the packing elements and anchoring means positioned between the shoulder and the setting sleeve; e. an annular recess formed in a portion of the setting sleeve; f. flexible collet fingers attached to the mandrel means; g. a collet head on the end of each finger; h. the collet heads and annular recess providing means for releasably locking the setting sleeve to the mandrel means; and i. means for releasing engagement between the collet heads and the annular recess. - View Dependent Claims (9, 10, 11)
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Specification