Hydraulic well pumping apparatus

Patent · Tue Mar 03 00:00:00 EST 1987

OSTI ID:7047519

Wright, C P

This patent describes a hydraulic powered well pumping apparatus for operation of a sucker rod well pump in a well borehole, the apparatus comprising: (a) an elongate polished rod having upper and lower ends, the rod being aligned above and adapted to connect to a string of sucker rods in a well borehole therebelow; (b) an adjustably positioned sleeve means aligned above and enclosing a portion of the polished rod and having a shorter length than the polished rod to enable the polished rod to extend above the sleeve means and below the sleeve means for connection to the string of sucker rods in the well borehole; (c) an axially hollow upstanding cylinder slideably receiving the sleeve means therethrough and enclosing a piston therein, the piston being: (1) moved on admitting hydraulic oil to the cylinder, and (2) joined to the sleeve means for moving the sleeve means and thereby moving the polished rod; (d) means for mounting the upstanding cylinder directly aligned with and above a casing at the top of a well adapted to have a sucker rod string positioned therein; (e) means for adjusting the stroke length imparted to the sucker rod string between minimum and maximum stroke lengths; and (f) means for adjusting the location of the sleeve means relative to the polished rod to vary the relative length of polished rod below the sleeve means and wherein a portion of the polished rod extends above the sleeve means dependent on the relative respective portions thereof.

• Assignee: NOV; NOV-87-050620; EDB-87-070369
• Patent Number(s): US 4646517
• OSTI ID: 7047519
• Resource Relation: Patent File Date: Filed date 11 Apr 1983
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
OIL WELLS
ROD PUMPS
HYDRAULIC EQUIPMENT
ALIGNMENT
CYLINDERS
HYDRAULIC FLUIDS
HYDRAULICS
LUBRICATING OILS
POSITIONING
EQUIPMENT
FLUID MECHANICS
FLUIDS
LUBRICANTS
MECHANICS
OILS
ORGANIC COMPOUNDS
OTHER ORGANIC COMPOUNDS
PETROLEUM PRODUCTS
PUMPS
WELLS
WORKING FLUIDS
020300* - Petroleum- Drilling & Production