Patent ID: 6145590
Filing Date: 2000-11-14
Classification: E21B

Abstract:
An oil pumping apparatus comprising:a downhole tubing;a valve rod positioned within the downhole tubing and adapted for reciprocating movement within the downhole tubing;a working barrel positioned within the downhole tubing, said valve rod received within said working barrel, said working barrel having a one-way valve at one end thereof;a plunger positioned within said working barrel and interconnected to said valve rod so as to move in correspondence with the reciprocating movement of said valve rod, said plunger having a one-way valve at an end opposite said valve rod;a first sand remover attached between said valve rod and said plunger, said first sand remover having a wiper extending outwardly therefrom so as to be in wiping contact with an interior surface of said working barrel; anda second sand remover attached to a bottom of said plunger below said one-way valve of said plunger, said second sand remover having a wiping member extending outwardly therefrom so as to be in wiping contact with the interior surface of said working barrel.