Pumpling system for oil production

Patent · Tue May 29 00:00:00 EDT 1984

OSTI ID:5251543

Yamato, I; Yamata, T

A pumping system for oil production comprises a hydraulic unit set on the ground and adapted to send out a pressure oil, and a pump unit set in an oil well and adapted to draw up crude oil therefrom. The pump unit comprises a pump cylinder, and a plunger reciprocatingly moved in the pump cylinder. The plunger is provided with a clearance formed between the outer circumferential surface of a lower end portion thereof and the inner circumferential surface of the pump cylinder. The pressure oil supplied from the hydraulic unit is ejected from the clearance along the inner surface of the pump cylinder into a cylinder chamber.

• Assignee: Mitsui Engineering and Shipbuilding Co. Ltd. (Japan)
• Patent Number(s): US 4451212
• OSTI ID: 5251543
• Resource Relation: Patent Priority Date: Priority date 6 Nov 1981, Japan; Other Information: PAT-APPL-318981
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
OIL WELLS
ROD PUMPS
DESIGN
OPERATION
CYLINDERS
DEPTH
HYDRAULIC EQUIPMENT
PRESSURIZING
VALVES
VISCOSITY
CONTROL EQUIPMENT
DIMENSIONS
EQUIPMENT
FLOW REGULATORS
PUMPS
WELLS
020300* - Petroleum- Drilling & Production