Pre-set inhibiting extrusion limiter for retrievable packers
AssigneeExacta-Frac Energy Services, Inc.
InventorAhmed Mohamed Saeed
Life of this patent
Estimating the term…
Abstract
A pre-set inhibiting extrusion limiter has a segmented anti-extrusion ring with a plurality of anti-extrusion ring segments supported by a stepped cone frustum. Each ring segment is retained in a run-in condition by a compression spring retained by a retainer ring held in a retainer ring groove in the respective anti-extrusion ring segments. A push ring moves the respective anti-extrusion ring segments from the run-in condition to a packer-set condition in which the anti-extrusion ring segments abut a cone frustum step of the stepped cone frustum.
Claims19
A pre-set inhibiting extrusion limiter for a packer element of a retrievable packer, comprising:
- a stepped cone frustum having a lower cone surface an upper cone surface and a cone frustum step between the lower cone surface and the upper cone surface;
- a plurality of anti-extrusion ring segments respectively having a lower ring segment surface supported on the lower cone surface;
- a retainer ring that adapted to be retained in a retainer ring groove in the respective anti-extrusion ring segments;
- and
- a compression spring adapted to be captured between each of the respective anti-extrusion ring segments and the retainer ring.
A pre-set inhibiting extrusion limiter for a packer element of a retrievable packer comprising:
- a segmented anti-extrusion ring that comprises a plurality of anti-extrusion ring segments urged to an unexpanded run-in condition by an elastomeric ring received in an elastomeric ring groove in a the respective anti-extrusion ring segments and a retainer ring received in a retainer ring groove in the respective anti-extrusion ring segments, a bottom of the respective retainer ring grooves comprising a ring segment spring socket that receives an end of a compression spring having an opposite end retained in a respective retainer ring spring socket in the retainer ring;
- and a stepped cone frustum having a lower cone surface adapted to support the respective anti-extrusion ring segments in the run-in condition.
A pre-set inhibiting extrusion limiter for a packer element of a retrievable packer comprising:
- a stepped cone frustum having a lower cone surface, an upper cone surface and a cone frustum step between the lower cone surface and the upper cone surface;
- a segmented anti-extrusion ring that comprises a plurality of identical anti-extrusion ring segments that are urged to an unexpanded run-in condition by an elastomeric ring adapted to be received in an elastomeric ring groove in the respective anti-extrusion ring segments and a retainer ring adapted to be received in a retainer ring groove in the respective anti-extrusion ring segments, a bottom of the respective retainer ring grooves comprising a ring segment spring socket adapted to receive an end of a compression spring having an opposite end retained in a respective retainer ring spring socket in the retainer ring;
- and
- a push ring having a push ring inclined surface adapted to abut a ring, segment push surface of the respective anti-extrusion ring segments.
Dependencies are inferred from the claim text.