Patent ID: 8297940

Claim:
A method of operating a sucker rod pump assembly in a well that extends from a surface of the earth into the ground, comprising the steps of: a) providing at least a first barrel and a second barrel incorporated into a tubing string in the well with the first barrel closer to the surface than the second barrel, and a plunger reciprocated by a sucker rod string from the surface of the well; b) locating the plunger in one of the first or the second barrel; c) reciprocating the plunger within the one of the first or the second barrel and producing fluid from the well to the surface; d) suspending the reciprocation of the plunger; e) relocating the plunger to the other of the first or the second barrel while maintaining the tubing string in the well; f) reciprocating the plunger within the other of the first or the second barrel and producing the fluid from the well to the surface, wherein when the plunger is in the second barrel the sucker rod string reciprocates through the first barrel.