Title:
SYSTEM FOR PRODUCING CRUDE OIL FROM UNDERGROUND OIL STRATUM
Document Type and Number:
Japanese Patent JPH03258071
Kind Code:
A
Abstract:
PURPOSE: To guide an accurate amount of processing fluid into a pump chamber of a oil pump below the ground level by allowing 1st and 2nd seal means which hermetically seal a pump barrel inside a mounted nipple means, the pump barrel and the mounted nipple to form a hermetically sealed annular chamber together inside a 2nd annular space. CONSTITUTION: A underground pump 26 is hermetically sealed and contained inside a mounted nipple 24, and mounting sealing elements 28 and 30 form a hermetically sealed partition chamber 34 together with a pump barrel 32 and a generating tube 18. The annular seals 28 and 30 prevent fluid from leaking between the barrel 32 around the pump 26 and a mounted nipple part 24 of the tube 18. An outlet valve 42 is placed inside a pump piston 44 to carry fluid from a pump chamber 40 to the surface of a oil well through the tube 18. Thereby, an accurate amount of processing fluid is guided into the pump chamber of a oil pump below the ground level.
Inventors:
JIIZASU II CHIYACHIN YUU
Application Number:
JP32875990A
Publication Date:
November 18, 1991
Filing Date:
November 28, 1990
Export Citation:
Assignee:
INTEVEP SA
International Classes:
E21B41/02; E21B43/12; E21B43/25; H04N1/32; (IPC1-7): H04M11/00; H04N1/32
Attorney, Agent or Firm:
Fujiya Shiga (1 person outside)