Downhole well pump with bottom standoff
OwnerCharles McAnallyinventor
Life of this patent
Estimating the term…
Abstract
In a downhole well pumping system an elongated bottom standoff pipe member is connected at one end to the lower end of a well pump and includes a plug disposed at the opposite end of the standoff pipe. The standoff pipe member is adapted to rest on the wellbore bottom wall to relieve at least some of the tensile forces acting on and otherwise causing elastic stretching of the tubing string of the pumping system. The bottom standoff pipe member is preferably a smooth walled cylindrical member with fluid inlet ports and a gas relief port formed therein, respectively.
Claims10
In a downhole well pump system, the improvement comprising:
- a reciprocating piston pump connected to a tubing string and disposed in a wellbore, said pump including an elongated cylinder member;
- and
- an elongated standoff member connected to said cylinder member and adapted to engage a bottom wall of said wellbore for transferring at least a portion of the weight of said tubing string and pump to said wellbore bottom wall to reduce elastic stretching of said tubing string.
In a downhole well pump system, the improvement comprising:
- a reciprocating piston pump connected to a tubing string and disposed in a wellbore, said pump including an elongated cylinder member;
- and
- an elongated standoff pipe member connected to and extending below said pump, said standoff member including a plug connected to a distal end thereof for engagement with a well bottom wall.
Dependencies are inferred from the claim text.