초록 ▼

The invention comprises a packer design for use in high temperature well bores. The packer is set by pressuring the well fluid through a tubing string, which moves a piston and shoe assembly on the packer mandrel, compressing a non-elastomeric high temperature packer element. The piston and shoe ass

The invention comprises a packer design for use in high temperature well bores. The packer is set by pressuring the well fluid through a tubing string, which moves a piston and shoe assembly on the packer mandrel, compressing a non-elastomeric high temperature packer element. The piston and shoe assembly combination is maintained in position after pressure is decreased, and the packer element is maintained in a compressed state by belleville springs which compensate for the lack of resiliency of the non-elastomeric packer element.

대표청구항 ▼

A packer, comprising: mandrel means; a compressible packer element on said mandrel means; fluid pressure actuated piston means adapted to compress said packer element; and mechanical packer element compression maintenance means, including: ratchet means associated with said piston means; and spring

A packer, comprising: mandrel means; a compressible packer element on said mandrel means; fluid pressure actuated piston means adapted to compress said packer element; and mechanical packer element compression maintenance means, including: ratchet means associated with said piston means; and spring means adapted to exert an axial force on said packer element and said ratchet means.