Flexible Choke And Kill Lines

  1. 10.1 Function. Flexible choke and kill lines allow relative movement at the telescopic joint (drape hose) and at flex/ball joints (jumper hose) in the riser system.
  2. 10.2 Typical Design. Three basic designs are commonly used; flexible pipe, steel reinforced hoses, or flow loops with threaded, clamped, or flanged end fittings. If threaded end fittings are used, they must contain a sealing means other than the threads.
  3. 10.3 Selection Criteria. Flexible lines should be compatible with the rest of the choke and kill piping system and with the BOP stack, riser, and choke and kill manifold. Selection of flexible lines should take into account the following considerations:
  4. Length requirement and tolerance b. End fitting compatibility c. Pressure rating (gas and liquid)
  5. Collapse rating e. Temperature rating (maximum, minimum, and ambient conditions)
  6. Minimum bend radius g. Fluid compatibility h. Resistance to wear by abrasive fluids i. Corrosion resistance j. Fatigue resistance to bend and pressure cycling 2.11 RISER RUNNING EQUIPMENT.
  7. 11.1 Function. Riser and diverter handling tools are used for hoisting and lowering the riser and BOP stack. The riser spider is used to support the riser and BOP stack while they are being run or retrieved. When used, guidelines direct the riser and associated subsea equipment to the wellhead.
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