P-X & P-XN LOCK MANDREL

P-X & P-XN LOCK MANDREL

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Description 

The ‘P-X’ Lock Mandrel is a downhole device, run and retrieved on slick line in which it is placed and anchored to the ‘P-X’ or ‘P-XN’ Landing Nipple within the tubing string to provide a set point for flow-control equipment such as valves, chokes, and plugs.

The two main types of Lock Mandrel use the different means of locating and anchoring; a Selective Lock locates and anchors any matching landing nipple profile within the tubing; and a No-Go non-selective nipple lock, usually installed at the bottom of the tubing string. The No-Go nipple lock can also be used in taper string applications.

Application

  • Plugging under pressure.
  • Provide pre-determined locations for setting and locking subsurface flow controls.
  • Locks are designed to hold pressure from above or below or from sudden reversals.
  • Landing Nipples have the same packing bore ID for a particular tubing size and weight.

Benefits

  • Faster slickline service because of the retractable keys.
  • Operator control of locating, landing, and locking in the selected nipple.
  • Inside fishing neck large ID to maximize production.
  • Optional hold-down feature for high flow rates and safety valve installation.
  • Hold-down reduce the risk of Lock Mandrel self-release.
  • Retractable Locking Key.
  • Extra-large ID for higher flow volumes.

 

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