초록 ▼

A subterranean well tool seals along a section of a wall of the well and is carried on a conduit into the well. A plurality of anchoring elements and seals are provided for respective anchoring and sealing engagement along the wall of the well in concert and substantially concurrently with one anoth

A subterranean well tool seals along a section of a wall of the well and is carried on a conduit into the well. A plurality of anchoring elements and seals are provided for respective anchoring and sealing engagement along the wall of the well in concert and substantially concurrently with one another when the tool is shifted to the set position. When the well tool moves to the set position, a portion of the mandrel separates and is retrieved from the well bore, allowing the well tool to be reduced in overall length. The anchoring elements are sandwiched in between first and second, or upper and lower, sets of seals.

대표청구항 ▼

1. A packer device for a well comprising: a) a mandrel having a central flow passage,b) an axially movably upper cone member having a cone surface,c) a lower cone surface on an outer surface of the mandrel,d) a plurality of slip segments positioned on the mandrel between the upper cone member and th

1. A packer device for a well comprising: a) a mandrel having a central flow passage,b) an axially movably upper cone member having a cone surface,c) a lower cone surface on an outer surface of the mandrel,d) a plurality of slip segments positioned on the mandrel between the upper cone member and the lower cone surface on the mandrel,e) a shear recess on a surface of the mandrel located below a top portion of the upper cone member prior to setting the packer such that when the packer device is set within the well, the upper cone member is moved to a position downhole of the shear recess so as to be supported by the mandrel when a portion of the mandrel uphole of the shear recess is removed during the setting process. 2. A packer device according to claim 1 further including a plurality of upper seals positioned between the slip elements and the axially movable upper cone member. 3. A packer device according to claim 2 further including a plurality of lower seals positioned between the slip elements and the lower cone surface on the outer surface of the mandrel. 4. A packer device according to claim 3 wherein the axially movable upper cone member includes internal threads that engage a body lock ring, the body lock ring surrounding an uphole portion of the mandrel. 5. A packer device according to claim 1 further including a frangible disc within the mandrel and blocking the central flow passage. 6. A packer device for a well comprising: a) a mandrel having a shear recess on a surface thereof and a central flow passage,b) the mandrel having an uphole portion on the uphole side of the shear recess and a downhole portion on the downhole side of the shear recess,c) an axially movable upper cone member overlaying at least a portion of the uphole portion of the mandrel when the packer device is in a run-in position within the well,d) a cone surface located around the downhole portion of the mandrel,e) a plurality of slip elements positioned around the mandrel between the axially moveable cone member and the cone surface, whereby when the packer device is in a set position, the axially movable upper cone member is supported on the downhole portion of the mandrel and the uphole portion of the mandrel is removed. 7. A packer for a well according to claim 6 further including a plurality of upper seals positioned between the slip elements and the axially movable upper cone member. 8. A packer device for a well according to claim 7 further including a plurality of lower seals positioned between the slip elements and the cone surface. 9. A packer device as claimed in claim 6 further including a frangible disc within the mandrel and blocking the central flow passage.