CA2452708A1 - Hydraulic oil well pump drive system - Google Patents

Hydraulic oil well pump drive system Download PDF

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Publication number
CA2452708A1
CA2452708A1 CA002452708A CA2452708A CA2452708A1 CA 2452708 A1 CA2452708 A1 CA 2452708A1 CA 002452708 A CA002452708 A CA 002452708A CA 2452708 A CA2452708 A CA 2452708A CA 2452708 A1 CA2452708 A1 CA 2452708A1
Authority
CA
Canada
Prior art keywords
master cylinder
master
oil well
piston
working
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CA002452708A
Other languages
French (fr)
Other versions
CA2452708C (en
Inventor
Lloyd Stanley
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority claimed from CA002131192A external-priority patent/CA2131192C/en
Publication of CA2452708A1 publication Critical patent/CA2452708A1/en
Application granted granted Critical
Publication of CA2452708C publication Critical patent/CA2452708C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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  • Reciprocating Pumps (AREA)
  • Details Of Reciprocating Pumps (AREA)

Abstract

A hydraulic oil well pump drive system for driving an oil well sucker rod (not shown) includes a master piston positioned within a master cylinder for axial displacement between first and second ends of the master cylinder. The master piston has a piston drive rod which extends through one end of the master cylinder.
The drive rod is connected to a crankpin of an eccentric crank. The eccentric crank is driven at a constant rotational speed to reciprocate the master piston within the master cylinder at a sinusoidal rate. A center seal assembly divides the master cylinder into a working chamber and a pressure chamber in opposite ends of the master cylinder. Each respective chamber defines a fluid volume which varies with the displacement of the master piston.
The master piston displacement creates a bi-directional flow of working fluid from the working chamber. A wellhead hydraulic assembly is operably connected to the oil well sucker rod and is in fluid communication with the master cylinder working chamber to receive the working fluid flow. The wellhead hydraulic assembly is responsive to the working fluid flow to reciprocate an oil well sucker rod at a rate which relates to the rate of master piston displacement. A gas accumulator is in fluid communication with the master cylinder pressure chamber to bias the master piston toward the master cylinder working end, providing an upward biasing force at the wellhead hydraulic assembly.
CA002452708A 1992-03-03 1993-03-01 Hydraulic oil well pump drive system Expired - Fee Related CA2452708C (en)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
US84537992A 1992-03-03 1992-03-03
US07/845,379 1992-03-03
US96741192A 1992-10-26 1992-10-26
US07/967,411 1992-10-26
CA002131192A CA2131192C (en) 1992-03-03 1993-03-01 Hydraulic oil well pump drive system

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
CA002131192A Division CA2131192C (en) 1992-03-03 1993-03-01 Hydraulic oil well pump drive system

Publications (2)

Publication Number Publication Date
CA2452708A1 true CA2452708A1 (en) 1993-09-16
CA2452708C CA2452708C (en) 2007-07-17

Family

ID=31949974

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002452708A Expired - Fee Related CA2452708C (en) 1992-03-03 1993-03-01 Hydraulic oil well pump drive system

Country Status (1)

Country Link
CA (1) CA2452708C (en)

Also Published As

Publication number Publication date
CA2452708C (en) 2007-07-17

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