Downhole pumps with sand snare

Details Downhole pumps with sand snare Downhole pumps with sand snare

F - Mech Eng,Light,Heat,Weapons

04

B

F04B 47/12 (2006.01) E21B 43/12 (2006.01) F04B 47/02 (2006.01) F04B 53/20 (2006.01)

Patent

CA 2572369

A downhole pump has a barrel and a plunger which reciprocate with respect to each other. The plunger has a first portion with a first seal, a second portion and a third portion with a second seal. The second portion is intermediate the first and second portions. A balancing chamber is formed between the plunger second portion and the barrel. The balancing chamber communicates with the plunger interior by way of an opening. A sand snare chamber is provided with respect to the opening so as to prevent sand from contacting the seals in the balancing chamber.

Une pompe de fond de trou comporte un cylindre et un plongeur qui se déplacent l'un par rapport à l'autre. Le plongeur comprend une première section, pourvue d'un premier joint, une seconde section et une troisième section, pourvues d'un second joint. La seconde section se trouve entre la première et la troisième section. Une chambre d'équilibrage est formée entre la seconde section du plongeur et le cylindre. Cette chambre communique avec la partie intérieure du plongeur au moyen d'une ouverture. Un piège à sable conçu pour empêcher le sable d'entrer en contact avec les joints, dans la chambre d'équilibrage, est aménagé au niveau de l'ouverture.

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