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US 2004/0164494 A1Published application
BOP assembly with metal inserts
AssigneeVarco Shaffer, Inc.
InventorRaul Araujo
Life of this patent
Estimating the term…
Abstract
A blowout preventer assembly 10 includes opposed rams 12, 14, each including a rubber or elastomer sealing assembly 16, 18, with a plurality of inserts 20 forming an array 22 of metal inserts within each sealing assembly. Each insert has an upper body 24, a lower body 26, and a rib 50. Each upper and lower body includes a trailing face 36, a radially outward opposite face 38 and a leading face 40. An antiextrusion ledge 46 minimizes the extrusion gap between the OD of a tubular in the BOP and the leading face of the metal inserts in the array.
Claims20
A blowout preventer for sealing engagement with a tubular within a wellbore, comprising:
- a blowout preventer body with a central bore;
- a pair of opposing ram block assemblies, each ram block assembly including a ram block at an inner end of a cylinder rod;
- a seal assembly carried by each ram block and radially moveable for sealing engagement and disengagement with the tubular, each seal assembly including a resilient seal for sealingly engaging the tubular and a plurality of inserts at least substantially embedded within the resilient seal for preventing extrusion of the resilient seal;
- each insert including a generally triangular shaped upper body, a generally triangular shaped lower body, and a rib fixedly interconnecting the upper body and the lower body, each upper body and lower body having a leading face, a trailing face, and a radially outward opposite face;
- an antiextrusion ledge extending from the leading face of the upper body;
- and
- an antiextrusion groove in the trailing face of the upper body for receiving the antiextrusion ledge of an adjacent insert.
4 more elements
A blowout preventer for sealing engagement with a tubular within a wellbore, comprising:
- a blowout preventer body with a central bore;
- a pair of opposing ram block assemblies, each ram block assembly including a ram block at an inner end of a cylinder rod;
- a seal assembly carried by each ram block and radially moveable for sealing engagement and disengagement with the tubular, each seal assembly including a resilient seal for sealingly engaging the tubular and a plurality of inserts at least substantially embedded within the resilient seal for preventing extrusion of the resilient seal, the plurality of inserts arranged to move in an iris pattern to alter a bore diameter of the blowout preventer;
- each insert including a generally triangular shaped upper body, a generally triangular shaped lower body, and a rib fixedly interconnecting the upper body and the lower body, each upper body and lower body having a leading face, a trailing face, and a radially outward opposite face;
- each of the upper body and the lower body including a circumferentially extending ledge extending from one of the leading face and the trailing face, and a cavity of the other of the leading face and the trailing face for receiving an adjacent ledge;
- an antiextrusion ledge extending from the leading face of the upper body;
- and
- an antiextrusion groove in the trailing face of the upper body for receiving the antiextrusion ledge of an adjacent insert.
5 more elements
A blowout preventer for sealing engagement with a tubular within a wellbore, comprising:
- a blowout preventer body with a central bore;
- a pair of opposing ram block assemblies, each ram block assembly including a ram block at an inner end of a cylinder rod;
- a seal assembly carried by each ram block and radially moveable for sealing engagement and disengagement with the tubular, each seal assembly including a resilient seal for sealingly engaging the tubular and a plurality of inserts at least substantially embedded within the resilient seal for preventing extrusion of the resilient seal, the plurality of inserts arranged to move in an iris pattern to alter a bore diameter of the blowout preventer;
- each insert including a generally triangular shaped upper body, a generally triangular shaped lower body, and a rib fixedly interconnecting the upper body and the lower body, each upper body and lower body having a leading face, a trailing face, and a radially outward opposite face, the trailing face angled at from 60° to 70° with respect to a tangent to the central bore in the blowout preventer body;
- an antiextrusion ledge extending from the leading face of the upper body;
- and
- an antiextrusion groove in the trailing face of the upper body for receiving the antiextrusion ledge of an adjacent insert.
4 more elements
Dependencies are inferred from the claim text.