Cameron Willis Chokes & Actuators - cedip

43Cameron Willis Subsea Control ChokesCameron Willis offers two types of subsea control chokes, non-retrievableand retrievable. The non-retrievable choke is permanently attached to asubsea structure. The retrievable chokes are designed so that the trim,actuator and retention mechanism can be retrieved to the surface formaintenance and upgrading.Cameron Willis designs and manufactures actuators for use with theirline of subsea production control chokes. Three designs are available: theRD250 Gearbox, the Aqua-Torq and SSLCA.Cameron Willis Subsea Control ChokesCameron Willis subsea chokes are used in production, water injection,gas injection and gas lift applications. Non-retrievable designs are usedprimarily in shallow water or as part of a retrievable manifold/moduleassembly. Retrievable chokes feature a retrievable insert and a fixedchoke body.Both retrievable and non-retrievable subsea chokes are available withplug and cage or external sleeve trim packages. Retrievable chokes areavailable with two types of connections for attaching the retrievableinsert to the choke body: Crown Connectors and Clamp Connectors.Nominal Sizes: 2", 3", 4", 6"Water Depth Rating: To 10,000 ft (3048 m)Working Pressure:To 15,000 psiOperating Temperatures: To 400˚ F (204˚C)Materials:API ratings AA, BB, CC, DD, EE, FF, HHPerformance Verification:Actuation:API 6A Appendix F, API 17DNon-Retrievable – SSLCA, RD250 GearboxRetrievable – Aqua-Torq, RD250 GearboxRD250 Gearbox ActuatorThe RD250 Gearbox actuator was developed for diver or ROV operation.In this design, the gearbox is oil-filled and pressure-compensated. Anexternal, local position indicator on the case allows precise choke settingsto be easily read.SSLCA ActuatorThe Subsea Stepping Linear Choke Actuator (SSLCA) was developed foruse on the Cameron Willis non-retrievable control chokes. The designof the SSLCA actuator includes independent open and close pistonassemblies, providing a “double step” operation on the close pistonfor rapid shut-in of the choke.Aqua-Torq ActuatorThe Cameron Willis Aqua-Torq Actuator is a compact and field-provenhydraulic actuator which provides actuation in precise incremental stepsfrom open to closed. It is suitable for mineral oil and water-basedcontrol fluids.The Aqua-Torq Actuator is oil-filled and pressure-compensated and hasbeen endurance tested to a minimum of 1 million actuation pulses andhyperbaric tested to 10,000 ft (3000 m). It incorparates a local, externalposition indicator and is available with an internal LVDT remote positiontransmitter.Remote Position FeedbackCameron Willis offers a remote position feedback sensor as an option forthe Aqua-Torq and SSLCA actuators. These sensors are robust, reliableand field-proven. They have been tested to simulated water depths of10,000 ft (3000 m).Fast Close ModuleAn operator may be faced with closing the well faster for HIPP systems,direct hydraulic systems, or oil fields with steep gradient flowlines. Withthis in mind, Cameron Willis offers a Fast Close Module that can be usedwith Aqua-Torq and SSLCA actuators. The Fast Close Module ensuresthat the operator can close a choke within 30 seconds without damagingthe choke or causing excessive pressure drops within the hydraulic supplysystem.Subsea Retrievable Chokewith Clamp ConnectorSubsea Retrievable Chokewith Crown ConnectorAqua-Torq Subsea Actuator(Cutaway View)© CAMERON, P.O. BOX 1212, HOUSTON TX, 77251-1212, TEL: 713.939.2211, FAX: 713.939.2620, WWW.CAMERONDIV.COM