Multifunctional double-acting hydraulic oil producing device

Abstract

The invention relates to a multifunctional double-acting hydraulic oil producing device which is characterized in that a two-way oil-well pump is placed in an oil well running casing, a long plunger piston is arranged in the two-way oil-well pump, a hollow draw rod is arranged on the long plunger piston, and pistons and hydraulic cylinders are arranged in the hollow draw bar; a two-way oil-well pump barrel is arranged between every two hydraulic cylinders, a traveling oil outlet valve is arranged on the hollow draw rod, and fixed oil inlet valves are arranged on sealing end covers; the hydraulic cylinders are connected with the two-way oil-well pump barrels through the sealing end covers, the pump barrels are connected with the hydraulic cylinders through the sealing end covers, the fixed oil inlet valves are arranged on the sealing end covers, and the long plunger piston and the pistons are connected through the hollow draw rod; and the travelling oil outlet valve is arranged on the hollow draw rod, a packer is connected with an overflow valve, the overflow valve is connected with a bayonet socket, the bayonet socket is connected with an oil tube until being connected with a well port. The hydraulic cylinders are used as driving force to drive the two-way pump plunger piston to synchronously move, and two-way oil inlet and outlet during up and down strokes are actually achieved. The invention has the characteristics of no eccentric wear between the oil pumping rod and the oil tube, energy saving and high production efficiency.

Description

technical field [0001] The present invention relates to a kind of oil production equipment used in oil fields, in particular to a multifunctional double-acting hydraulic oil production device in which the pump plunger can complete the oil inlet and discharge in both directions during the up and down strokes. The improvement of the structure of the pumping unit belongs to the technical field of E21B43 / 00 in the international patent classification table. Background technique [0002] At present, most of the oil extraction at home and abroad adopts mechanical oil extraction process equipment: downward bias barbell type beam composite balanced pumping unit, pendulum bar pumping unit, Xinyu long stroke pumping unit and electric submersible pump and other structures Form of pumping unit. Sand control is required for oil wells with a lot of sand during oil production, and heating (steam injection, electric heating, etc.) for heavy oil wells is required to ensure normal production,...

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Problems solved by technology

[0007] An object of the present invention is to solve the technical problem that the upper and lower chambers of the existing double-acting hydraulic oil production pump have accumulated sand, causing serious wear between the plunger and the pump barrel, often causing pump jams, and affecting work efficiency; another aspect of the present invention One purpose is to solve the technical problem that the existing double-acting hydraulic oil production pump stops the oil intake and discharge process for a period of time when the up and down stroke ends and changes direction, and at the same time it starts with load, which affects the stability of the hydraulic system.

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