Hydraulic Decoking Systems Crosshead (Free Fall Arrestor)
The crosshead and free fall arrestor unit guides and centers the rotary joint-drill stem-cutting tool assembly in the coke drum. The crosshead is designed to safely absorb all torque loads normally sustained from cutting operations.
Petroleum Production and Refining, Decoking
Heavy Oil and Upgrading, Delayed Coking
Features and Benefits
- Crossheads are available in two designs –
- Shoe-type – Two rectangular shaped shoes which ride inside the structure’s beams
- Wheeled-type – Four wheel blocks with spring-loaded guides in two planes ride on a track attached to the structure’s beams.
- Free Fall Arrestor (FFA) – Ensures safe operation by preventing cutting assembly equipment from falling in the event of suspension failure. Built into the crosshead, no electric or pneumatic connections are required for activation.
- Provides personnel and equipment safety in the event of steel wire rope failure. Prevents cutting assembly from falling and damaging the cutting deck
- Prevents ancillary equipment damage
- Automatically disengages upon the restoration of required rope tension
- FFA includes cable gripping and rail gripping mechanisms as part of the standard scope of supply
- Other crosshead and FFA components include:
- Winch wire rope
- Wire rope tension monitoring (tensiometers)
- Lead, crown, traveling and guide blocks
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Оборудование систем гидравлической резки и выгрузки кокса
Remote and Automated Hydraulic Decoking Systems
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Flowserve Hydraulic Decoking System Equipment
|Description:||The lifting mechanism for the drill string utilizes multiple blocks and sheaves built to Flowserve specifications. Multiple sizes and load ratings are available to meet specific unit requirements.|
|Description:||Customized decoking ball valves are used to manage cutting water flow to the coke drums and to relieve drum pressure. The valve designs incorporate unique features that provide long life and safe operations.|
|Description:||The decoking winch is specifically designed for use in coke cutting to raise and lower the cutting tool in the coke drums. Several unique features are incorporated to assure safe, reliable operation in the most demanding environments.|
|Description:||Flowserve decoking hoses are designed for the harsh environment of the delayed coker. These high-pressure hoses are oil and chemical resistant and feature abrasive-resistant outer covers with multiple layers of wire reinforcement for strength and durability.|
|Description:||The decoking operating system utilizes state-of the-art programmable controllers, monitoring equipment, and field devices with over 20 years of field-proven design techniques.|
|Description:||The Flowserve decoking control valve controls the flow from the jet pump with a single valve providing three distinct features: recirculation flow control, pre-fill and full flow to the decoking tool nozzles.|
|Description:||The Flowserve compression type tensiometer replaces typical designs used for measuring cable tension. The result is a more practical load measurement system with many safety, operation and maintenance advantages.|
|Description:||The AutoShift combination decoking tool makes remote drum decoking feasible by removing the operator from the cutting deck. Boring and cutting mode shifting is accomplished automatically and safely within the drum by water pressurization and depressurization.|
|Description:||The Flowserve Pacific® heavy-duty rotary joint is robustly designed to support the suspended loads experienced in coking units. Its function is to transmit cutting fluid from the stationary hose connection to the drill stem and cutting tool. Flowserve is continually upgrading its rotary joint to accommodate increasingly higher cutting pressure requirements.|
|Description:||Built to meet or exceed ISO 13709/API 610 (BB5), latest design, the WIK is a multistage, double-case barrel pump. Its unique low specific speed hydraulics and extra heavy-duty design are especially engineered for reliable service in jet pump decoking services. The WIK is intended for special purpose, unspared, high-power density and extremely arduous conditions.|
|Description:||The Flowserve drill stem guide and shroud can accommodate up to 305 mm (12 inches) of overall lateral misalignment. The innovative design rides on the drill stem and fully encloses the cutting tool. It diverts dangerous water flow vertically away from operators in the unlikely event a pressurized cutting tool is retracted from the drum or energized while stowed.|
|Description:||Flowserve latch mechanisms enable stowing of the crosshead when not in use, providing a safe and practical way to remove tension on the cable and winch.|
|Description:||Video monitoring systems provide critical feedback to operators and are an essential part of remotely operated coke cutting systems from Flowserve.|
|Description:||Audio monitoring systems provide critical feedback to operators and are an essential part of remotely operated coke cutting systems from Flowserve.|
|Description:||Flowserve coke drum monitoring systems provide coke cutting personnel with positive confirmation that the coke has been removed and the cutting process can continue. The system can be integrated with the decoking control system for maximum ease-of-use or provided as a stand-alone option.|
|Description:||Flowserve threaded drill stems are extremely durable for decoking service with a side load strength four times greater than comparable welded drill stem designs.|
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