Artificial lifting system
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United States of America Patent
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Oct 4, 1994
Grant Date -
N/A
app pub date -
Jun 30, 1992
filing date -
Jun 30, 1992
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An artificial lifting system is designed for use at a pumping installation which has a pump drive at the surface or head end of a well and a reciprocating pump positioned in the lower end of the well. The artificial lifting system has a tubing string connected between the pump drive and the pump for performing the dual functions of reciprocating the pump plunger in response to activation of the pump drive, and for transporting oil from the underground source to the wellhead. The tubing string advantageously is constructed of a plurality of lightweight, non-metallic tubing segments which are axially connected to form an elongated conduit of several thousand feet in length. In the exemplary embodiment, the tubing segments are made of a glass and carbon reinforced epoxy resin. Preferably, the composite material has a density of approximately 0.1 pounds per cubic inch and a fiber content of approximately 60% by volume, with the resulting composite material having an elastic modulus in excess of 700,000 psi. The invention additionally is directed to various structural features for facilitating the implementation of such a composite lifting system.
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