Schlumberger Technology Corporation

Saltel Industries

Services Petroliers Schlumberger

Francois Bajart

Samuel Roselier

Romain Neveu

Julie Leduc

Benjamin Saltel

Robin Limary

A technique facilitates pressure application downhole by locking a ball in place to prevent it from unseating even if the pressure is bled off. A ball seat is constructed with a locking feature for effectively capturing and retaining the ball once the ball is seated in the ball seat under sufficient pressure. According to an embodiment, the ball seat may be mounted at a desired position along an internal flow passage of a well string component. The ball seat comprises a throat section which is formed of a ductile material arranged in a suitable structure to enable a desired deformation upon receiving the ball under sufficient pressure. As the ball is pressed into the throat section, the material of the throat section deforms and partially springs back to resist movement of the ball in the uphole direction, thus capturing the ball in both the uphole direction and the downhole direction.

System and method utilizing ball seat with locking feature

An extrudable ball seat () is configured to be secured along a well tubing (). The extrudable ball seat () comprises a larger diameter section () and a smaller diameter () section connected by a conical section (). The conical section () has an internal seating surface () for receiving a corresponding element, e.g. a ball (), in sealing engagement. The extrudable ball seat () facilitates controlled extrusion of the element following a pressure actuation procedure by providing the smaller diameter section () with sufficient ductility to enable extrusion of the element under an increased predetermined pressure. Additionally, the extrudable ball seat comprises at least one notch (), e.g. a plurality of grooves (), positioned to initiate crack propagation and thus extrusion of larger elements.

Extrudable ball seat system and methodology

A device for lining or obturating a wellbore or a pipe. The device includes a tubular radially-expandable lining and at least one ring seal carried by the lining. The seal includes at least one first part formed by a filament or a braid mounted spirally about the external surface of the lining.

Device for lining or obturating a wellbore or a pipe

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Bruz, France

Francois Bajart