초록 ▼

A seal bore packer comprising a packer subassembly which can be employed with either wireline or tubing manipulatable packer setting subassemblies is disclosed. Packing elements and slips on a packer subassembly are expanded when relative axial forces are applied to the packer by wireline or mechani

A seal bore packer comprising a packer subassembly which can be employed with either wireline or tubing manipulatable packer setting subassemblies is disclosed. Packing elements and slips on a packer subassembly are expanded when relative axial forces are applied to the packer by wireline or mechanical setting forces. The packer has an inner mandrel and intermediate mandrel connected by a shear pin. A collapsible ring holds the outer packer assembly, including slips and packing elements, normally secured to the intermediate mandrel. Relative movement between the intermediate mandrel and the inner mandrel releases the packer.

대표청구항 ▼

In a packer apparatus for use in a subterranean well having a casing, said packer comprising: annular radially expandable, axially compressible packing element means; radially expandable anchoring slip means for securing the packer apparatus in the casing; first and second relatively axially shiftab

In a packer apparatus for use in a subterranean well having a casing, said packer comprising: annular radially expandable, axially compressible packing element means; radially expandable anchoring slip means for securing the packer apparatus in the casing; first and second relatively axially shiftable expander members engageable with the slip means to radially expand the slip means to engage the casing; first and second abutment means engageable with the packing element means, the first and second abutment means being relatively axially shiftable to expand the packing element means to engage the casing; an inner mandrel extending through the slip means, the expander members and the packing element means, and having a seal bore surface therein; an intermediate mandrel encircling the inner mandrel and extending through the slip means, the expander members and the packing element means, the first expander member being moveable relative to the intermediate mandrel; and locking means between the intermediate mandrel and the first expander member permitting relative movement therebetween in one direction only; the improvement comprising: first disengageable means for securing the inner mandrel and the intermediate mandrel against relative axial movement therebetween during radial expansion of the packing element means and the slip means, release of the first disengageable means with the packing element means and slip means expanded permitting relative axial movement between the inner and intermediate mandrels; second disengageable means securing the intermediate mandrel to the second abutment means, the second disengageable means being shiftable to release the second abutment means from the intermediate mandrel upon relative axial movement between the inner mandrel and intermediate mandrel; a setting subassembly comprising inner and outer axially telescoping members, the inner telescoping member being attachable to the inner mandrel and the outer telescoping member being engageable with the first expander member for imparting relative movement between the first expander and the inner mandrel in response to a force applied to the setting subassembly; and a tubular member connectable and disconnectable to the inner telescoping member and having seals on the exterior thereof, the tubular member being shiftable in the inner mandrel with the seals engaging the seal bore surface thereon, whereby the packer apparatus may be set within a well to seal the annulus between the tubular member and the casing.