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F and R Seating Nipples
The Model F™ seating nipple is a top no-go or selective seating nipple that provides for the location of various wireline flow control devices in the production string. The Model R™ seating nipple is a bottom no-go seating nipple that provides for the location of various wireline flow control devices in the production string. The location and number of seating nipples should be carefully considered in the completion planning stages to allow maximum versatility in the positioning of various flow control accessories. Models F and R seating nipples are manufactured per NACE MR0-175
Models F and Model R seating nipples may be used for the following operations: • Land blanking plugs to shut in well or to test the production tubing • Land velocity type safety valves (SSCSV) • Land equalizing check valves • Land circulating blanking plugs • Land chokes to reduce surface flowing pressures or to have pressure drops downhole to prevent surface freezing in gas production • Land instrument hangers with geophysical devices such as pressure and temperature recorders • Prevent loss of wireline workstring in some cases