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Rodless hydraulic oil pumping unit

An oil pumping and hydraulic technology, which is applied in the direction of liquid displacement machinery, mining fluid, wellbore/well components, etc., can solve the problems of high power fluid requirements, short service life, large stroke loss, etc., and achieve high component strength, The effect of long life and increased down stroke

Inactive Publication Date: 2007-11-21
徐正国
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The current oil pumping device includes a hydraulic piston pump, which adopts a moving rod structure and is reversed through a slide valve. The oil pumping device is composed of the pumping unit on the ground, the sucker rod in the wellbore and the pump. This kind of device has problems such as large stroke loss, low pump efficiency and serious wear of the rod and tube.

Method used

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  • Rodless hydraulic oil pumping unit
  • Rodless hydraulic oil pumping unit
  • Rodless hydraulic oil pumping unit

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Embodiment Construction

[0034] As shown in Figures 1, 2, 3 and 4, a rodless hydraulic oil pumping device of the present invention includes a liquid inlet screen 1 connected to a lock joint 3, and the lock joint passes through the upper joint 4 of the outer pipe and the upper piston The rod 5 is internally threaded, the upper piston rod 5 is connected with the outer pipe upper joint, the outer pipe upper joint is threaded with the outer pipe 6, the collar 2 is threaded with the outer pipe upper joint 4, and the upper piston rod 5 passes through the sand control cap 7, The upper cylinder 8 is threaded with the valve cover 11, the sand control cap 7 is threaded with the upper cylinder 8, the upper cylinder 8 is threaded with the reversing joint 9, the reversing joint 9 is threaded with the lower cylinder 10, and the ball catcher 12 is installed in the symmetrical groove on both sides of the valve cover 11, the pin 13 connects the ball pliers with the valve cover, the valve ball 14 is installed in the val...

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PUM

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Abstract

The invention relates to a non-bar hydraulic pressure oil pumping device that belongs to power device installed underground. It is made up of ball valve reversing structure, pincer ball-catching structure, spring bearing structure and one-way valve drain structure. The invention adopts new type ball valve reversing structure to avoid blocking, and reducing tearing; adopts pincer ball-catching structure to make the ball valve switch more flexible and reliable; adopts one-way valve drain structure to reduce the burden on the up process and increase quantity to the down process.

Description

technical field [0001] The invention relates to an oil production device, in particular to a rodless hydraulic oil pumping device. Background technique [0002] The current oil pumping device includes a hydraulic piston pump, which adopts a moving rod structure and is reversed through a slide valve. The oil pumping device is composed of the pumping unit on the ground, the sucker rod in the wellbore and the oil pump. This kind of device has problems such as large stroke loss, low pump efficiency and serious wear of the rod and tube. Contents of the invention [0003] The object of the present invention is to provide a rodless hydraulic oil pumping device, which can effectively solve the aforementioned problems by adopting a moving cylinder structure and a ball valve reversing structure. [0004] The object of the invention adopts following technical scheme to realize: [0005] A rodless hydraulic oil pumping device, comprising a liquid inlet screen connected to a lock joi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F04B47/08E21B43/00
Inventor 徐正国徐正明董凯
Owner 徐正国