SBOP swarf wiper
AssigneeNational Oilwell Varco, L.P.
InventorsSergio Garcia, Chris Johnson, Lydia Mireles, Ali A. Al-Quraishi, Nathan Follett
Life of this patent
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Abstract
A wiper (200a) for a blowout preventer having an adapter ring (102a) and a piston (104a) slideable relative to the adapter ring along an interface can include a base (202) adapted to couple the wiper to the adapter ring and a head (204) coupled to the base. The head can include a first portion adapted to bridge the interface and contact the piston and a second portion adapted to contact the adapter ring and support the first portion. The second portion of the head can be adapted to at least partially resist rotation of the wiper. A blowout preventer can include one or more wipers as shown and described.
Claims21
A wiper for an annular blowout preventer having an adapter ring and a piston slideable relative to the adapter ring along an interface, the wiper comprising:
- a base adapted to couple the wiper to the adapter ring;
- and
- a head coupled to the base;
- wherein the head includes a first portion adapted to bridge the interface and contact the piston and a second portion adapted to contact a surface of the adapter ring;
- wherein the second portion of the head is adapted to bias the first portion of the head toward the piston;
- wherein the first portion of the head is adapted to wipe the piston when the piston slides relative to the adapter ring;
- and
- wherein a length of the first portion of the head extending outward from the base is greater than a length of the second portion of the head extending outward from the base, and wherein the second portion of the head includes a first side that intersects the base at an angle that is either obtuse or acute.
An annular blowout preventer, comprising:
- an adapter ring having an interior wall;
- a piston having an exterior wall and being slideable relative to the adapter ring along an interface between the interior wall of the adapter ring and the exterior wall of the piston;
- a pressure seal disposed along the interface fluidicly between a bore chamber and a hydraulic fluid chamber;
- and
- a wiper disposed within the bore chamber, the wiper comprising
- a base coupled to the adapter ring;
- and
- a head coupled to the base;
- wherein the head includes a first portion adapted to bridge the interface and contact the piston and a second portion adapted to contact the interior wall of the adapter ring;
- wherein the second portion of the head is adapted to bias the first portion of the head toward the piston;
- wherein the first portion of the head is adapted to wipe the piston when the piston slides relative to the adapter ring;
- and
- wherein a length of the first portion of the head extending outward from the base is greater than a length of the second portion of the head extending outward from the base, and wherein the second portion of the head includes a first side that intersects the base at an angle that is either obtuse or acute.
An annular blowout preventer, comprising:
- a stationary component;
- a piston slideable relative to the stationary component along an interface;
- a pressure seal disposed along the interface fluidicly between a bore chamber and a hydraulic fluid chamber;
- and
- a wiper disposed within the bore chamber, the wiper comprising
- a base coupled to the stationary component;
- and
- a head coupled to the base;
- wherein the head includes a first portion adapted to bridge the interface and contact the piston and a second portion adapted to contact a wall of the stationary component;
- wherein the second portion of the head is adapted to bias the first portion of the head toward the piston;
- and
- wherein the first portion of the head is adapted to wipe at least a portion of the piston when the piston moves relative to the stationary component;
- and
- wherein a length of the first portion of the head extending outward from the base is greater than a length of the second portion of the head extending outward from the base, and wherein the second portion of the head includes a first side that intersects the base at an angle that is either obtuse or acute.
Dependencies are inferred from the claim text.