Pump tool

Details Pump tool Pump tool

1990-02-16

1992-07-07

Bertsch, Richard A.

Pumps

Drilled well free piston-type pump

Having condition or position responsive control of pump...

417 56, 417 60, F02B 4712

Patent

active

051278030

ABSTRACT:
An improved pump tool (10, 110, 200) is provided for lifting oil from within a casing 18 of a well. The gas in the well provides the lifting action. The pump tool includes a body (22) which is preferably formed of ABS plastic. The body defines an upper chamber (24) and a lower chamber (26) which is connected through a hydrostatically operated valve (44). The plastic body weighs less, is chemically resistant and reduces the risk of spark and explosion.

REFERENCES:
patent: 4070134 (1978-01-01), Grambling
patent: 4259858 (1981-04-01), Freeman et al.
patent: 4880366 (1989-11-01), Stinson
patent: 4889473 (1989-12-01), Krueger

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