Landing Nipple and Lock Mandrel

Landing nipples are downhole components, fabricated as a short section of heavy wall tubular with a machined internal surface that provides a seal area and a locking profile. The Landing Nipples are included in most completions at a pre-determined intervals to enable the installation of flow-control devices, such as Plugs and Chokes.

Three basic types of Landing Nipples are commonly used: No-Go Nipples, Selective-Landing Nipples and Ported Safety Valve Nipples. The Landing Nipples have the same Packing Bore ID for a particular tubing size and weight. ‘LNX’ and ‘LNXN’ Landing Nipples are designed for use with standard weight tubing. ‘LNR’ and ‘LNRN’ Landing Nipples are for heavy weight tubing. The ‘N’ designation is for No-Go Nipples.

The completion can have as many LNX and LNR selective nipples with the same ID in any sequence as desired on the tubing string. This versatility result in an unlimited number of positions for setting and locking subsurface flow controls. The flow control, which is attached to the required lock mandrel, is run in the well via the selective running tool on the slickline.

Features and Benefits

• Large bore for minimum restriction
• Universal nipple with one internal profile
• Lock mandrel locks design to holds pressure from above and below
• Extra large ID for high flow rate
• Simple operation
• Versatility helps reduce completion and production maintenance costs
• Multiple options when running, setting, or retrieving subsurface flow controls
• Field proven
• Versatility helps reduce completion and production maintenance costs

Applications

• Gauge hangers for bottom hole pressure/temperature surveys
• Almost unlimited locations for setting and locking subsurface flow controls
• Lock Mandrel with plugs holds pressure from above and below
• Setting packers
• Killing the well
• Removing the wellhead