F - Mech Eng,Light,Heat,Weapons – 04 – B
Patent
F - Mech Eng,Light,Heat,Weapons
04
B
103/142
F04B 47/00 (2006.01)
Patent
CA 2028617
In well pumping apparatus in which a polished rod is arranged for extension through a stuffing box at the upper end of a wellhead, the stuffing box assembly having a pair of axially spaced bearing assemblies and packing coils positioned between rod guide members at either end of the assembly to guide the polished rod for reciprocal movement along a vertical path through the wellhead. Each rod guide member is composed of an inert material and provided with a liner portion occupying the annular space between an exposed end of the stuffing box and the polished rod in such a way as to retain alignment of the polish rod in its reciprocal movement through the stuffing box. In a modified form, the lowermost liner portion has scraper rings mounted in internal grooves to remove scale build-up on the polished rod, reduce packing wear and minimize leakage.
Newton Hille
Thompson Lambert Llp
LandOfFree
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